CN102378820A - Method for adding binder, device for adding binder, kneading machine and kneading method - Google Patents

Method for adding binder, device for adding binder, kneading machine and kneading method Download PDF

Info

Publication number
CN102378820A
CN102378820A CN2010800145388A CN201080014538A CN102378820A CN 102378820 A CN102378820 A CN 102378820A CN 2010800145388 A CN2010800145388 A CN 2010800145388A CN 201080014538 A CN201080014538 A CN 201080014538A CN 102378820 A CN102378820 A CN 102378820A
Authority
CN
China
Prior art keywords
tackiness agent
raw material
water
nozzle
mixing
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Granted
Application number
CN2010800145388A
Other languages
Chinese (zh)
Other versions
CN102378820B (en
Inventor
兼井玲
安部洋一
藤木涉
八代健一
长田淳治
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Nippon Steel Corp
Original Assignee
Nippon Steel Corp
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Nippon Steel Corp filed Critical Nippon Steel Corp
Publication of CN102378820A publication Critical patent/CN102378820A/en
Application granted granted Critical
Publication of CN102378820B publication Critical patent/CN102378820B/en
Active legal-status Critical Current
Anticipated expiration legal-status Critical

Links

Images

Classifications

    • C—CHEMISTRY; METALLURGY
    • C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
    • C22B—PRODUCTION AND REFINING OF METALS; PRETREATMENT OF RAW MATERIALS
    • C22B1/00—Preliminary treatment of ores or scrap
    • C22B1/14—Agglomerating; Briquetting; Binding; Granulating
    • C22B1/16—Sintering; Agglomerating
    • C—CHEMISTRY; METALLURGY
    • C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
    • C22B—PRODUCTION AND REFINING OF METALS; PRETREATMENT OF RAW MATERIALS
    • C22B1/00—Preliminary treatment of ores or scrap
    • C22B1/14—Agglomerating; Briquetting; Binding; Granulating
    • C22B1/24—Binding; Briquetting ; Granulating
    • C22B1/2406—Binding; Briquetting ; Granulating pelletizing
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01F—MIXING, e.g. DISSOLVING, EMULSIFYING OR DISPERSING
    • B01F23/00—Mixing according to the phases to be mixed, e.g. dispersing or emulsifying
    • B01F23/50—Mixing liquids with solids
    • B01F23/54—Mixing liquids with solids wetting solids
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01F—MIXING, e.g. DISSOLVING, EMULSIFYING OR DISPERSING
    • B01F25/00—Flow mixers; Mixers for falling materials, e.g. solid particles
    • B01F25/70—Spray-mixers, e.g. for mixing intersecting sheets of material
    • B01F25/72—Spray-mixers, e.g. for mixing intersecting sheets of material with nozzles
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01F—MIXING, e.g. DISSOLVING, EMULSIFYING OR DISPERSING
    • B01F25/00—Flow mixers; Mixers for falling materials, e.g. solid particles
    • B01F25/70—Spray-mixers, e.g. for mixing intersecting sheets of material
    • B01F25/72—Spray-mixers, e.g. for mixing intersecting sheets of material with nozzles
    • B01F25/721—Spray-mixers, e.g. for mixing intersecting sheets of material with nozzles for spraying a fluid on falling particles or on a liquid curtain
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01F—MIXING, e.g. DISSOLVING, EMULSIFYING OR DISPERSING
    • B01F27/00—Mixers with rotary stirring devices in fixed receptacles; Kneaders
    • B01F27/60—Mixers with rotary stirring devices in fixed receptacles; Kneaders with stirrers rotating about a horizontal or inclined axis
    • B01F27/70—Mixers with rotary stirring devices in fixed receptacles; Kneaders with stirrers rotating about a horizontal or inclined axis with paddles, blades or arms
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01F—MIXING, e.g. DISSOLVING, EMULSIFYING OR DISPERSING
    • B01F33/00—Other mixers; Mixing plants; Combinations of mixers
    • B01F33/80—Mixing plants; Combinations of mixers
    • B01F33/82—Combinations of dissimilar mixers
    • B01F33/821—Combinations of dissimilar mixers with consecutive receptacles
    • B01F33/8212—Combinations of dissimilar mixers with consecutive receptacles with moving and non-moving stirring devices
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01J—CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS
    • B01J2/00—Processes or devices for granulating materials, e.g. fertilisers in general; Rendering particulate materials free flowing in general, e.g. making them hydrophobic
    • C—CHEMISTRY; METALLURGY
    • C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
    • C22B—PRODUCTION AND REFINING OF METALS; PRETREATMENT OF RAW MATERIALS
    • C22B1/00—Preliminary treatment of ores or scrap
    • C22B1/14—Agglomerating; Briquetting; Binding; Granulating
    • C22B1/24—Binding; Briquetting ; Granulating
    • C22B1/242—Binding; Briquetting ; Granulating with binders

Landscapes

  • Chemical & Material Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Engineering & Computer Science (AREA)
  • Organic Chemistry (AREA)
  • Materials Engineering (AREA)
  • Geology (AREA)
  • Manufacturing & Machinery (AREA)
  • Geochemistry & Mineralogy (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Mechanical Engineering (AREA)
  • Metallurgy (AREA)
  • General Life Sciences & Earth Sciences (AREA)
  • Environmental & Geological Engineering (AREA)
  • Dispersion Chemistry (AREA)
  • Manufacture And Refinement Of Metals (AREA)
  • Glanulating (AREA)

Abstract

Provided are: a method for adding a binder, whereby a binder can be uniformly added to an iron ore material in the course of pelletizing the iron ore material and the concentration and additive amount of the binder can be highly accurately and quickly controlled; and an addition device therefor. The method for adding a binder is characterized by comprising: providing a mixing nozzle (70) for mixing a binder with water, which are separately supplied from a binder supply pipe (63) and a water supply pipe (66) respectively, in the vicinity of a material-feeding part (55) of a kneading machine (50); and, from the mixing nozzle (70), spraying an aqueous binder solution, which comprises the binder and water mixed together, onto an iron ore material having been fed into the material-feeding part (55) of the kneading machine (50).

Description

Tackiness agent addition means, tackiness agent adding set, mixing roll and compounding process
Technical field
The present invention relates to and to add tackiness agent equably and but high precision is promptly controlled the concentration of tackiness agent and tackiness agent addition means, tackiness agent adding set, mixing roll and the compounding process of addition to the iron ore raw material.
Background technology
In the granulation of iron ore raw material, after adding to tackiness agent stoste (being also referred to as the granulation treatment agent) and moisture adjustment water (below be called add water) in the iron ore raw material, carry out mixing and granulation.In the granulating working procedure, improving the granulation thing qualitatively, importantly high precision and promptly control amount of binder and add the water yield, be the concentration and the addition of binder aqueous solution, and the iron ore raw material is added binder aqueous solution equably.
For example, in patent documentation 1, proposed in the granulation of the raw materials for sintering that contains iron ore,, moisture has been evenly dispersed in the raw material integral body through utilizing different watering mechanism spray adhesive and water in tablets presss such as drum mixer.
To have mixed when containing particle diameter and carrying out granulation from the state of the iron ore raw material of the micro mist of the coarse grain about several mm below 250 μ m; Tackiness agent importantly through playing a role as dispersion agent; Micro mist in the raw material is suitably disperseed, make micro mist attached on the coarse-grained surface that becomes nuclear particle.So; When the granulation of the iron ore raw material that is the main body with said micro mist, in order to improve the quality of granulation thing, as utilizing tablets press to make the last stage of granulation thing; The mixing roll that will be used for mixing iron ore raw material is located at the leading portion of tablets press; In this mixing roll, need binder aqueous solution that adjust to normality be added in the iron ore raw material equably, fully carry out mixing.
In patent documentation 2; When carrying out with the micro mist being the granulation of iron ore raw material of main body, in order to obtain the size-grade distribution as target, having proposed at first to use mixing roll is that the iron ore raw material of the particle below the 250 μ m carries out mixing to containing granularity more than the 60 quality %; Making mean particle size is the above and mixing thing below the 7mm of 3mm; Then, this mixing thing is carried out granulation with drum mixer (tablets press), make granularity and be the above and granulation thing below the 10mm of 3mm method.
Usually, for example when adding binder aqueous solution of above-mentioned patent documentation 2 through mixing roll, adopt from the main part of the mixing roll of rotating vanes and supply with tackiness agent and water, in this mixing roll, add the method for binder aqueous solution.
In addition, in patent documentation 3,, proposed to be pre-mixed the granulation treatment agent and added water, this mixed solution has been sprayed in the tablets press, with the method for iron ore raw materials mix in order in tablets press, the granulation treatment agent to be blended in the iron ore raw material equably.
The prior art document
Patent documentation
Patent documentation 1: TOHKEMY 2007-113087 communique
Patent documentation 2: TOHKEMY 2007-247020 communique
Patent documentation 3: TOHKEMY 2004-137595 communique
Patent documentation 4: Japan special table 2003-515440 communique
Summary of the invention
The problem that invention will solve
But; In above-mentioned patent documentation 2 described tackiness agent addition meanss; As shown in Figure 1; Owing between main part 2 inner peripheral surfaces of the mixing roll 1 of rotating vanes and agitating vane 3, have the gap, thereby adhere to raw material at the inner peripheral surface of main part 2, formation adhesive coating 4 (be raw material from coating layer (self ling)).Therefore; Via the pipe arrangement 5 that is connected on the main part 2; Receive the obstruction of above-mentioned adhesive coating 4 from adding the binder aqueous solution 7 that nozzle 6 sprayings form, thereby can not be sprayed directly in the raw material in mixing, wander and propagate along the inner peripheral surface of main part 2; Get into from the crack of adhesive coating 4, be added in the raw material partly.In this case, in the difficult specified time in raw material is trapped in mixing roll 1, add binder aqueous solution 7 equably, tackiness agent is inhomogeneous existence in raw material, and binder concn produces deep or light, thereby can not obtain being fit to the mixing thing of granulation condition.
In addition; The residence time of raw material in mixing roll can be obtained through the raw material accumulating amount in its input amount and the mixing roll; But according to the relation of plant bulk, difficulty is defined as the very long time with this residence time, is the short period of time about 3 minutes even length is also mostly usually.Therefore, need be in the said short period of time, make the uniform binder aqueous solution of concentration be blended in equably raw material all in, when adding binder aqueous solution, need this binder aqueous solution is controlled at the concentration of regulation through mixing roll.
Method as the binder concn of guaranteeing from above-mentioned viewpoint to stipulate; For example; Can consider to adopt following method: in the interpolation of the binder aqueous solution in mixing roll, use patent documentation 3 described formations of adding the device of granulation treatment agent to tablets press; As shown in Figure 2; Through the static agitation machine 10 that sets at (below be called point of addition) isolating position from the position of the interpolation nozzle 6 of mixing roll 1, with tackiness agent stoste with add water and mix, binder aqueous solution is transported to the point of addition of mixing roll 1 through 1 pipe arrangement 5.
In the method; Can adopt regulating valve 11 and magnetic flow meter 12, control is adopted regulating valve 14 and magnetic flow meter 15 simultaneously along the flow of pipe arrangement 13 mobile tackiness agent stostes; The flow of water is added in control along pipe arrangement 16 mobile; Mix both through static agitation machine 10 thus, generate the binder aqueous solution of normality, this binder aqueous solution is supplied in the mixing roll 1 with 1 pipe arrangement 5.
, the many keepings of iron ore raw material are outdoor, because of the contained moisture of climatic influences iron ore raw material (below be called raw material moisture) frequent variations.In addition, the situation that the proportioning of multiple iron ore raw material changes is also more, and according to this proportioning, raw material moisture changes.Owing to these reasons, the moisture of putting into the iron ore raw material in the mixing roll 1 frequently changes, thereby unstable.Therefore,, and add in the mixing roll 1 even generate the binder aqueous solution of normalitys through above-mentioned static agitation machine 10, practical function in the binder concn of raw material also according to the raw material moisture change.So, seeking the addition that moisture is controlled binder concn and binder aqueous solution accurately that contains according to raw material always.That is to say; The concentration of binder aqueous solution and addition need be corresponding with the variation of raw material moisture, control the quality of the solids component in the tackiness agent stoste accurately and by the quality of the moisture in the tackiness agent stoste and add this two aspect of moisture quality that the total of the quality of water constitutes.
Yet; In the method for the static agitation machine 10 of above-mentioned employing Fig. 2; Remaining in the pipe arrangement 5 through static agitation machine 10 blended binder aqueous solutions before changing of raw material moisture; Even thereby raw material moisture after changing control pipe arrangement 13,16 flow, also be difficult to control accurately the concentration and the addition that add the tackiness agent in the raw material to.
For example, as after state, under the situation that raw material moisture in putting into mixing roll 1 descends, the concentration that remains in the binder aqueous solution in the pipe arrangement 5 becomes higher with comparing with respect to the top condition of the raw material moisture after this decline.That is to say; Under the situation that raw material moisture descends; Need relatively to increase and add the water yield; Thereby with the decline of raw material moisture before compare the concentration itself that needs to reduce binder aqueous solution, but can not adjust remaining in pipe arrangement 5 interior binder aqueous solutions, binder concn is still high density.Therefore, if the binder aqueous solution that this is remaining adds in the raw material, then utilizing mixing roll 1 to carry out when mixing, binder concn is too high, and mixing thing presents the argillaceous that is clamminess, the state that formation can not granulation (below be called slurry form).On the other hand, under the situation that raw material moisture rises, the concentration that remains in the binder aqueous solution in the pipe arrangement 5 becomes lower with comparing with respect to the top condition of the raw material moisture after this rising.Therefore, binder concn is low excessively when mixing, can not obtain good granule size and intensity.
Particularly, mixing thing is appeared under the situation of slurry form, can not carry out self the conveying from the mixing roll to the tablets press sometimes, the significant trouble that manufacturing line stops to take place.In the example that the application inventor experienced; Following example occurs repeatedly: even reduce a little under the situation of 0.5 quality % at the raw water score value, the raw material that transfers out from mixing roll 1 also is slurry form, can not carry out later conveying; Production line stops, and has to go out this raw material clearly with manual work.The control lag of the binder concn that is caused by the binder aqueous solutions in the pipe arrangement in the downstream side that remains in static agitation machine 10 5 like this, becomes important problem.
For addressing the above problem, as shown in Figure 3, can consider to carry tackiness agent stoste respectively and add water with pipe arrangement 13,16, make near the method for static agitation machine near the point of addition that arrives mixing roll 1.However, even using this method of Figure 3, when the mixture through a static mixer 10 and adding the amount of binder liquid water changes, along pipes 13 and 16, respectively, within a predetermined pressure and transported to the binder liquid water is added In the static mixer 10 is another Interference, the collapse pressure balance between the two, and thus far there is a fee to the stabilization of time.Therefore; In the method that adopts Fig. 2 and static agitation machine 10 shown in Figure 3, even the situation that the reply raw material moisture changes with 0.5 quality % a little can not instantaneously carried out the flow adjustment; To dominant discharge stable till generation time postpone, thereby above-mentioned significant trouble might take place.Like this; Think for the binder aqueous solution that obtains normality in the method for the static agitation machine 10 that must use having adopted; For poor with the responsiveness of the change of the corresponding binder concn of change of raw material moisture, thereby the concentration of adding the tackiness agent in the raw material to and addition are promptly controlled accurately is unusual difficulty.
Situation from above explanation; In the past in order to improve the granulation property in the granulating working procedure; In advance to being that the iron ore raw material of main body carries out in the mixing mixing operation with the micro mist; Expectation always can be added tackiness agent in this raw material and can be according to the raw material operational throughput and the raw material moisture that at every moment change equably, accurately the concentration of the tackiness agent that added of control promptly and the method for addition.
Thereby; The present invention accomplishes in view of the above problems; The objective of the invention is to, provide and to add tackiness agent equably and can promptly control concentration and addition novel of tackiness agent accurately and the iron ore raw material through improved tackiness agent addition means, tackiness agent adding set, mixing roll and compounding process.
Be used to solve the means of problem
In order to solve above-mentioned problem; Inventors further investigate, and the result finds: the mixing nozzle through utilizing outlet side to open wide mixes tackiness agent and interpolation water, and the raw material in the raw material throw-in part of putting into mixing roll is sprayed; Thereby can not make tackiness agent stoste and the pressure equilibrium collapse of adding water; Can promptly control addition and binder concn to the change of soil water content of iron ore raw material, be blended in the iron-smelting raw material equably.
In addition, find to collide contacting the binder aqueous solution that can be uniformly mixed with tackiness agent through the interpolation water that makes spraying in order to mix the high tackiness agent of viscosity equably and to add water.
The present invention takes all factors into consideration above-mentioned opinion and accomplishes, and is described below as the part of its main idea.
According to certain viewpoint of the present invention; A kind of tackiness agent addition means is provided; It is characterized in that: in the granulation of iron ore raw material; To be arranged near the raw material throw-in part of mixing roll of iron ore raw material the tackiness agent supplied with respectively by tackiness agent supply-pipe and water-supply pipe and water mixes and outlet side opens wide mixing nozzle, the iron ore raw material the raw material throw-in part that drops into said mixing roll sprayed the binder aqueous solution that mixes by said tackiness agent and said water from said mixing nozzle.
In addition; For solving above-mentioned problem; According to another viewpoint of the present invention; A kind of tackiness agent adding set is provided, it is characterized in that: possess in the granulation of iron ore raw material the tackiness agent supply-pipe of supplying with tackiness agent, water-supply pipe and the mixing nozzle of supplying with water, said mixing nozzle is arranged near the raw material throw-in part of mixing roll of iron ore raw material; Said tackiness agent and said water to being supplied with respectively by said tackiness agent supply-pipe and said water-supply pipe mix, and the outlet side of said mixing nozzle opens wide; Said mixing nozzle sprays by said tackiness agent and said water the iron ore raw material in the raw material throw-in part that drops into said mixing roll and mixes and the binder aqueous solution of generation.
In addition,,, a kind of mixing roll is provided, it is characterized in that: possess said tackiness agent adding set according to another viewpoint of the present invention for solving above-mentioned problem.
In addition; For solving above-mentioned problem,, a kind of compounding process is provided according to another viewpoint of the present invention; It is characterized in that: adopt said tackiness agent adding set; For the iron ore raw material in the raw material throw-in part of putting into mixing roll, on one side the spray adhesive aqueous solution, mixing said iron ore raw material in said mixing roll on one side.
In addition; Can carry out according to following mode: said mixing nozzle is by outer nozzle and is provided in the dual structure that the inner nozzle in the said outer nozzle constitutes; On a side of said outer nozzle or said inner nozzle, connect said tackiness agent supply-pipe, on the opposing party of said outer nozzle or said inner nozzle, connect said water-supply pipe, through for the said tackiness agent of in said outer nozzle, supplying with by said tackiness agent supply-pipe; The said water that spraying is supplied with by said water-supply pipe; In said outer nozzle, mix said tackiness agent and said water, generate said binder aqueous solution, said iron ore raw material is sprayed said binder aqueous solution from the jet hole of said outer nozzle.
In addition; Can carry out according to following mode: said tackiness agent supply-pipe is connected with influx on the side that is formed at said outer nozzle with connecting; Said water-supply pipe is connected with said inner nozzle with being communicated with, through being ejected into the said tackiness agent in the said outer nozzle for the said influx from said outer nozzle, from the jet hole of the said inner nozzle said water of spraying; Said water is blended in the said tackiness agent, generates said binder aqueous solution.
In addition; Can carry out according to following mode: said water-supply pipe is connected with opening on the side that is formed at said outer nozzle with connecting; Said tackiness agent supply-pipe is connected with said inner nozzle with being communicated with, through being ejected into the said tackiness agent in the said outer nozzle for the jet hole from said inner nozzle, from the said opening of the said outer nozzle said water of spraying; Said water is blended in the said tackiness agent, generates said binder aqueous solution.
In addition, said tackiness agent also can be the dispersion agent of polyacrylic.Have, the viscosity of tackiness agent stoste is preferably below the 5000mPas again.
In addition, the moisture that also can be contained according to said iron ore raw material or the input amount of the said iron ore raw material in the said mixing roll are controlled either party flow at least in said tackiness agent supply-pipe or the said water-supply pipe.
In addition, can carry out according to following mode: said iron ore raw material contains micro mist and the nuclear particle that after utilizing said mixing roll mixing, utilizes tablets press to carry out granulation, and said tackiness agent is in said iron ore raw material, to make said micro mist dispersive dispersion agent.
According to above-mentioned formation; Near the raw material throw-in part that mixing nozzle is arranged on mixing roll; Through using pipe arrangement separately to be transported to the mixing nozzle that is positioned near point of addition (the raw material throw-in part) in tackiness agent and water, can control the feed rate of tackiness agent and water accurately.In addition, mixing nozzle mixes tackiness agent and the water of being supplied with respectively by tackiness agent supply-pipe and water-supply pipe, generates binder aqueous solution, and the iron ore raw material in the raw material throw-in part of putting into mixing roll is sprayed this binder aqueous solution.Thus, can, the iron ore raw material add the uniform binder aqueous solution of concentration equably before being dropped into mixing roll to this iron ore raw material.In addition; Because mixing nozzle mixed adhesive and water under opening pressure; Therefore can change the concentration of binder aqueous solution rapidly, and, can concentration binder aqueous solution after changing be added in the iron ore raw material immediately through mixing nozzle being located near the raw material throw-in part.Thereby, can make the concentration of binder aqueous solution and addition be altered to suitable value respectively accurately rapidly according to the change that contains moisture or raw material input amount of iron ore raw material, add in the iron ore raw material.
The invention effect
As described above, according to the present invention, can in the iron ore raw material, add tackiness agent equably and can promptly control the concentration and the addition of tackiness agent accurately.
Description of drawings
Fig. 1 is the explanatory view of expression attached to the adhesive coating on the main part inner peripheral surface of in the past rotating vanes mixing roll.
Fig. 2 is the synoptic diagram that the tackiness agent addition means of static agitation machine is adopted in expression.
Fig. 3 is the routine synoptic diagram of change of the tackiness agent addition means of expression employing static agitation machine.
Fig. 4 is the synoptic diagram of agglomerating plant that expression possesses the mixing roll of the 1st embodiment of the present invention.
Fig. 5 is the synoptic diagram of mixing roll that expression possesses the tackiness agent adding set of this embodiment.
Fig. 6 is the synoptic diagram of mixing nozzle of the tackiness agent adding set of this embodiment of expression.
Fig. 7 is the synoptic diagram of the mixing nozzle of the routine tackiness agent adding set of the change of this embodiment of expression.
Embodiment
Below, with reference to accompanying drawing, the embodiment of the best of the present invention is elaborated.Have again, in this specification sheets and accompanying drawing, for having the integrant that identical function constitutes in fact, additional phase symbol together, and omission repeat specification.
[1. the integral body of agglomerating plant constitutes]
At first, with reference to Fig. 4, the integral body of the agglomerating plant of the mixing roll that adopted the tackiness agent adding set with the 1st embodiment of the present invention constituted describe.Fig. 4 is the synoptic diagram that the integral body of the agglomerating plant of the expression mixing roll that adopted the tackiness agent adding set with this embodiment constitutes.
As shown in Figure 4, the agglomerating plant of this embodiment mainly possesses simulation granulation production line 20, grain granulation production line 30 and sinter machine 40.Grain granulation production line 30 is the manufacturing lines that are used to make to being the iron ore raw material of the main body granulation thing that carries out granulation and form (below be called " raw materials for sintering particle ") with the micro mist.On the other hand, simulation granulation production line 20 is to be used to make carry out granulation and make the manufacturing line of micro mist attached to the granulation thing that forms on the coarse grain that becomes nuclear particle (below be called " simulation granulation thing ") containing micro mist and coarse-grained iron ore raw material.
Here, at first the iron ore raw material that is used to make above-mentioned raw materials for sintering particle and simulate the granulation thing is described.Adopt the iron ore raw material as the raw materials for sintering of making agglomerate with sinter machine 40.As this raw materials for sintering; For example, can use at main raw material is the mixing raw material that obtains as auxiliary material more than a kind or 2 kinds that has added in the iron ore raw material in ironmaking dust (blast furnace control of dust dust, converter dust etc.), particle feed, Wingdale, rhombspar, silica, peridotites, coke powder, the hard coal etc.As the iron ore raw material, so long as the common iron ore as the raw materials for sintering use, its kind is unqualified; For example, except rhombohedral iron ore, magnetite, also can be (for example to contain than the iron ore of multi-crystallization water; Pyrrhosiderite, limonite (beans ore (pisolitic ore) etc.) etc.); Having, also can be the ore (for example, horse traction mamba ore (Marra Mamba Ore), high phosphorus Bu Luokeman ore (Brockman Ore) etc.) of porous matter again.
Above-mentioned iron ore raw material makes granulation property variation because of containing more micro mist, the weakened of granulation thing, and the granulation thing breaks in conveying operation before sinter machine 40 and the sintering circuit in the sinter machine 40.Therefore, when the iron ore raw material that will contain more said micro mist directly imports sinter machine 40, cause air permeability to worsen significantly, the productivity of infringement agglomerate.So, handle the intensity that improves the granulation thing through said iron ore raw material is applied granulation.
That is to say; Above iron ore raw material is classified according to its mineral or granularity; Granulation production line with simulation granulation production line 20 and grain granulation production line 30 these two systems carries out granulation (simulation particleization or prilling) respectively, makes raw materials for sintering particle and simulation granulation thing.Below, each granulation production line is detailed.
At first, simulation granulation production line 20 is elaborated.Simulation granulation production line 20 is to make the production line that makes micro mist (for example particle diameter is below the 250 μ m) go up the simulation granulation thing that obtains attached to the coarse grain (for example particle diameter is more than the 3mm) of the iron ore raw material that becomes nuclear particle.As shown in Figure 4, this simulation granulation production line 20 has the raw material tank 21 that stores the raw materials for sintering contain seedy and micro mist, sifting machine 22, mixing roll 23 that raw materials for sintering and water-soluble binder etc. are mixing, makes the tablets press 24 of simulating the granulation thing through mixing raw materials for sintering being carried out granulation.
In raw material tank 21; For example; Store iron ore (for example beans ore) that contains seedy and micro mist or the iron ore raw material that contains coke powder, Wingdale etc., adopt sifting machine 22 that this iron ore raw material screening is become the coarse grain of regulation particle diameter above (for example more than the 3mm) and the micro mist littler than coarse grain.Wherein can flow to tablets press 24 with coarse grain directly as nuclear particle.
On the other hand, micro mist is for example packed in the mixing roll 23 that is made up of sieve ground lattice mixing machine (Loedige mixer) etc., together mixing with tackiness agent, generate mixing thing.As mixing roll 23, can use ploughshare mixing machine (Ploughshare mixer), love the upright mixing roll of being permitted mixing machine rotating vanes such as (EIRICH mixer).As the tackiness agent that adds in the mixing roll; From improving the viewpoint of granulation property; For example can adopt in dispersion agents such as polyacrylic (be used to the dispersion agent that promotes that solid is crosslinked, comprise the aqueous solution or the colloid that have added dispersion agent), unslaked lime, the xylogen more than at least a kind.The tackiness agent in the mixing roll that adds to as in the granulating working procedure of the agglomerating plant that has adopted this embodiment example preferably adopts dispersion agents such as polyacrylic.
The mixing thing that will obtain through mixing roll 23 and pack in the tablets press 24 that constitutes by drum mixer etc. from the coarse grain of above-mentioned sifting machine 22.About this tablets press 24, for example, can use drum mixer or pan pelletizer etc., through said tablets press 24, the mixing thing of iron ore raw material is carried out granulation (simulation particleization), become simulation granulation thing.Particularly, handle through the granulation that utilizes tablets press 24, coarse grain be nuclear particle around adhere to coke powder, other iron ore, be contained in the micro mist (for example particle diameter is 250 μ m below) in the tackiness agent, make and simulate the granulation thing (for example, particle diameter is 1～10mm).
Then, grain granulation production line 30 is elaborated.Grain granulation production line 30 is to make the iron ore raw material that is the main body with the micro mist below the particle diameter of regulation is carried out granulation and the granulation thing that obtains is a raw materials for sintering particulate production line.With the micro mist is the iron ore raw material of main body, for example is to contain the iron ore raw material that the above particle diameter of 60 quality % is the particle below the 250 μ m.The raw materials for sintering particle for example is that particle diameter is that 1～10mm, median size are the granulation thing of 5mm, in this embodiment, is to contain the granulation thing that the above particle diameter of 70 quality % is the above particle of 3mm.
As shown in Figure 4, this grain granulation production line 30 possesses raw material tank 31, the sifting machine 32 that is used to store with the micro mist iron ore raw material that is main body, the kibbler 33 that is used to pulverize this iron ore raw material, raw materials for sintering after pulverizing and tackiness agent etc. is carried out mixing mixing roll 34, makes raw materials for sintering particulate tablets press 35, sifting machine 36, the raw materials for sintering particle of granulation is carried out exsiccant drying machine 37 through mixing raw materials for sintering being carried out granulation.Wherein, mixing roll 34 is examples that possess the mixing roll of tackiness agent adding set of the present invention, and it is stated after specifying.
In the raw material tank 31 of above-mentioned grain granulation production line 30; Store the raw materials for sintering of tackiness agents such as the various iron ore raw materials (for example, horse traction mamba ore, high phosphorus Bu Luokeman ore etc.) that contain more micro mist, the powder material that contains above-mentioned ironmaking dust, particle feed etc. or Wingdale etc.As this iron ore, from being easy to granulation and embodying the viewpoint of the intensity of granulation thing, preferably wait through sifting machine (not shown) in advance the scalping screen blanking more than the regulation particle diameter is gone, become the micro mist (for example particle diameter is that 3mm is following) of certain degree.
From the iron ore raw material that said raw material tank 31 is supplied with, at first,, will stipulate that then the micro mist below the particle diameter (for example 3mm) supplies in the kibbler 33 by sifting machine 32 screenings.On the other hand, this particle more than regulation particle diameter is fed in the tablets press 24 of simulation granulation production line 20 for the nuclear particle as above-mentioned simulation granulation thing.Kibbler 33 for example is made up of roll extrusion compressor, ball mill etc., with the size-grade distribution of the iron ore raw material pulverizing that drops into to regulation.So, through the iron ore raw material pulverizing being carried out micronization and whole grain, the granulation processing of back segment is more prone to.
Then, in mixing roll 34, after having carried out the moisture adjustment, carry out mixing to little powdered iron ore raw material through interpolation tackiness agent and moisture.In this embodiment,, for example, can use the mixing roll of rotating vanes such as sieve ground lattice mixing machine, ploughshare mixing machine as this mixing roll 34.So in this embodiment, mixing roll 34 is set, forms the formation of the mixing ability that has improved iron ore raw material and tackiness agent through leading portion at tablets press 35.As the tackiness agent that adds in the mixing roll; From improving the viewpoint of granulation property; For example, can adopt in dispersion agents such as polyacrylic (be used to the dispersion agent that promotes that solid is crosslinked, comprise the aqueous solution or the colloid that have added dispersion agent), unslaked lime, the xylogen more than at least a kind.The tackiness agent in the mixing roll that adds to as in the granulating working procedure of the agglomerating plant that adopts this embodiment example preferably adopts dispersion agents such as polyacrylic.
Pack into and carry out granulation in the tablets press 35 utilizing mixing roll 34 to carry out raw materials for sintering after mixing.As tablets press 35, for example, can use drum mixer or pan pelletizer etc.Through utilizing the granulation of said tablets press 35, for example, the roughly spheric granulation thing that can make particle diameter and be 1～10mm, preferable particle size and be 3～6mm (for example median size is 5mm) is the raw materials for sintering particle.About this raw materials for sintering particulate size-grade distribution, for example, can be that granularity more than the 3mm is defined as 70 quality % also with particle diameter.
The raw materials for sintering particle of so making carries out drying with drying machine 37 screened the granulation thing more than the regulation particle diameter with sifting machine 36 after.As drying machine 37, can use fluidised bed drying machine, packing layer drying machine, drum type brake drying machine etc.
As previously discussed, cooperate with the simulation granulation thing of simulation granulation production line 20 granulations with the raw materials for sintering particle of grain granulation production line 30 granulations, supply in the sinter machine 40 by the proportioning of regulation.40 pairs of above-mentioned 2 kinds of raw materials for sintering granulation things of sinter machine carry out sintering, make agglomerate.This agglomerate supplies to blast furnace via after the fragmentation that utilizes crusher (not shown) and utilizing the cooling of sinter cooler (not shown).
More than, the integral body of the agglomerating plant of this embodiment constituted be illustrated.In this embodiment; In above-mentioned simulation granulation production line and grain granulation production line 30; In order to improve the granulation property of tablets press 24,35, at its leading portion mixing roll 23,34 is set respectively, through this mixing roll 23,34; Tackiness agent is added to carried out in the iron ore raw material mixing after, the mixing thing that obtains is offered tablets press 24,35 carries out granulation.This embodiment is utilizing said mixing roll 23,34 to carry out having characteristic aspect the tackiness agent addition means when mixing, and mixing roll 23,34 possesses the tackiness agent adding set of characteristic structure in order to realize this tackiness agent addition means.Have again, after the mixing roll shown in Figure 5 50 stated be suitable as the mixing roll 23,34 of above-mentioned agglomerating plant shown in Figure 4.The tackiness agent adding set and the tackiness agent addition means that about the characteristic of this embodiment are mixing roll 50 are said (with reference to Fig. 5～Fig. 7) like the back.
[the 2. checking result of the necessity of binder concn control]
Then; Before the tackiness agent addition means to this embodiment is elaborated; Adopt the example of above-mentioned Fig. 2 and tackiness agent addition means shown in Figure 3, high precision and the checking result that promptly controls the necessity of binder concn describe when adding to tackiness agent in the mixing roll.
As stated; In the tackiness agent addition means of Fig. 2 and Fig. 3,, adopt static agitation machine 10 for uniform binder aqueous solution is added in the iron ore raw material; The water (interpolation water) of mixed adhesive stoste and moisture adjustment usefulness; Generate the binder aqueous solution of normality, this binder aqueous solution is supplied with mixing rolls 1 via 1 pipe arrangement 5, add to the iron ore raw material from the main part 2 of mixing roll 1.In addition, because of moisture (raw material moisture) change that the iron ore raw material of putting in the mixing roll 1 contains, the appropriate value that therefore adds the binder concn in this raw material to also at every moment changes.If the binder concn that adds in the iron ore raw material through mixing roll 1 is not an appropriate value, then the granulation property decline of the granulating working procedure of back segment.So, when raw material moisture changes, need promptly binder concn to be changed to the concentration of the raw material moisture after being fit to change as far as possible.
; The tackiness agent addition means of above-mentioned Fig. 2 and Fig. 3 is owing to be that 1 device through 1 pipe arrangement, 5 supply binder aqueous solutions constitutes from static agitation machine 10 to mixing roll; Thereby when raw material moisture changes; Even 11,14 pairs in IMU inflow-rate of water turbine variable valve is supplied with the tackiness agent stoste of static agitation machine 10 and the flow of interpolation water is regulated; Be controlled to the binder concn of the raw material moisture after being fit to change, remain in the binder aqueous solution (the concentration adhesive aqueous solution of the raw material moisture before being fit to change) in this pipe arrangement 5 in any case also be fed in the mixing roll 1, thereby add in the raw material.So, the tackiness agent addition means of above-mentioned Fig. 2 and Fig. 3 produces delay with the degree that remains in the binder aqueous solution in the pipe arrangement 5 in the change of binder concn, thereby poor with respect to the responsiveness of the variation of raw material moisture.
Thereby; The application inventors are in the tackiness agent addition means of above-mentioned Fig. 2 and Fig. 3; When raw material moisture changes, remain in binder aqueous solution in the pipe arrangement 5 and the binder concn of the mixing thing that is suitable for granulation is produced the how detrimentally affect of degree verify.
Table 1 and table 2 illustrate its result.Table 1 is illustrated in this tackiness agent addition means; The ratio (raw material moisture ratio) of the moisture that the iron ore raw material in dropping into mixing roll 1 is shared is verified and the result that obtains the deviation of comparing with appropriate value of the adhesive solids composition in the raw material when 8.5 quality % drop to 8.0 quality %.Table 2 is illustrated in the raw material moisture ratio when 8.0 quality % rise to 8.5 quality %, and the deviation of comparing with appropriate value of the adhesive solids composition in the raw material is verified and the result that obtains.Have again, in above-mentioned checking, in the tackiness agent addition means of Fig. 2,, use the pipe arrangement 50A of long 20m as pipe arrangement 5.
Table 1: the deviation of the adhesive solids composition ratio of raw material moisture ratio when 8.5 quality % drop to 8.0 quality %
Figure BDA0000095055120000131
Table 2: the deviation of the adhesive solids composition ratio of raw material moisture ratio when 8.0 quality % rise to 8.5 quality %
Figure BDA0000095055120000141
Here, the various terms that use in his-and-hers watches 1 and the table 2 define.Have, binder aqueous solution is the aqueous solution that tackiness agent stoste and water (interpolation water) mix again, and raw material moisture is the moisture that the iron ore raw material is contained.
The quality of the moisture in the tackiness agent stoste: WB (ton)
The quality of the solids component in the tackiness agent stoste: SB (ton)
Add the quality of water: WW (ton)
Drop into the quality of the preceding raw material moisture of mixing roll: WF (ton)
Drop into the quality of the preceding iron ore raw material of mixing roll: SF (dry-ton)
Binder concn CB is the concentration (quality %) of adding the binder aqueous solution in the iron ore raw material to, representes with following formula.
CB＝{SB/(SB+WB+WW)}×100
Binder aqueous solution addition T is the quality of adding the binder aqueous solution in the iron ore raw material to, representes with following formula.
T＝SB+WB+WW
The adhesive solids composition is the ratio (quality %) of the quality SB of the solids component in the tackiness agent stoste with respect to the quality SF of iron ore raw material than RS, representes with following formula.
RS＝{SB/SF}×100
Raw material moisture ratio RW0 is the ratio (quality %) of the quality WF of raw material moisture with respect to the total mass (SF+WF) of iron ore raw material and raw material moisture, representes with following formula.
RW0＝{WF/(SF+WF)}×100
The ratio (quality %) of the total mass of the quality of mixing back raw material moisture ratio RW1 and be total moisture after with respect to the mixed adhesive aqueous solution and iron ore raw material is represented with following formula.
RW1＝{(WF+WB+WW)/(SF+SB+WF+WB+WW)}×100
Then, the checking result of his-and-hers watches 1 and table 2 describes.
In tackiness agent addition means shown in Figure 2; As shown in table 1;, remain in the binder concn CB (14.1 quality %) of the binder aqueous solution in the pipe arrangement 5 and compare with optimal concentration CB (7.7 quality %) and increase when 8.5 quality % are reduced to 8.0 quality % at raw material moisture ratio RW0 with respect to the raw material moisture ratio (8.0 quality %) after the decline.Therefore; The binder aqueous solution that remains in the high density in this pipe arrangement 5 is added to raw material during A; With in about 1.9 times tackiness agent of SB solids component SB ' supply in the iron ore raw material in the mixing roll 1, thereby binder concn is too high in mixing.Consequently, the tackiness agent excess supply, mixing thing slurryization, thus produce mixing thing the decline of granulation property, or can not carry great influence such as mixing thing.
On the other hand; As shown in table 2;, remain in the binder concn CB (7.7 quality %) of the binder aqueous solution in the pipe arrangement 5 and compare with optimal concentration CB (14.1 quality %) and decrease when 8.0 quality % rise to 8.5 quality % at raw material moisture ratio RW0 with respect to the raw material moisture ratio (8.5 quality %) after the rising.Therefore; The binder aqueous solution that remains in the lower concentration in this pipe arrangement 5 is being added among the time A in the raw material; Only will be in about 0.52 times tackiness agent of SB solids component SB ' supply in the iron ore raw material mixing roll 1 in, so binder concn is low excessively in mixing.Consequently, the tackiness agent undersupply produces great influence such as granulation thing particle size reduction.
More than, learn from the checking result of table 1 and table 2: even the moisture of iron ore raw material that drops into mixing roll 1 in the tackiness agent addition means of above-mentioned Fig. 2, also occurs the problem that granulation property descends significantly with 0.5 quality % left and right sides subtle change.In addition; In the tackiness agent addition means of Fig. 3; Though how much improve the problems referred to above; But the responsiveness of the static agitation machine 10 when changing binder concn according to the variation of raw material moisture is poor, and therefore have following problems: before the pressure equilibrium in static agitation machine 10 reached stabilization, the binder aqueous solution of deviation of concentration proper concn was added.So; In the tackiness agent addition means of above-mentioned Fig. 2 and Fig. 3; Through adopting static agitation machine 10; Although have the advantage that can generate the uniform binder aqueous solution of concentration, there is following technical task: the binder aqueous solution that when the variation of raw material moisture, can not supply with proper concn rapidly.
In addition; In the tackiness agent addition means of Fig. 2 and Fig. 3; For the structure of the interpolation nozzle 6 spray adhesive aqueous solution from the main part 2 of the mixing roll 1 that is connected rotating vanes, therefore, as shown in Figure 1; Also there is following technical task: if form adhesive coating 4 at the inner peripheral surface of main part 2, then can not be to the spray adhesive aqueous solution equably of the raw material in the mixing roll 1.
Thereby; In order all to solve these technical tasks; Like following detailed description, the tackiness agent addition means of this embodiment is characterised in that: with tackiness agent stoste with add water and under the state of dominant discharge accurately, be transported in the raw material throw-in part of mixing roll with separately pipe arrangement, through near the mixing nozzle that is configured in this raw material throw-in part both are mixed; Form binder aqueous solution, binder aqueous solution is added to the iron ore raw material that drops into mixing roll from this mixing nozzle.
[3. tackiness agent adding set and addition means]
Then, with reference to Fig. 5, the tackiness agent adding set of an embodiment of the present invention and the tackiness agent addition means that adopts it are described.Fig. 5 is the synoptic diagram of mixing roll that expression possesses the tackiness agent adding set of this embodiment.Have, mixing roll 50 shown in Figure 5 is applicable to the mixing roll 23,34 in the simulation granulation production line 20 that is located at agglomerating plant shown in Figure 4, the grain granulation production line 30 again.
As shown in Figure 5, the mixing roll 50 of this embodiment is the mixing roll with blade rotational structure, for example, is made up of sieve ground lattice mixing machine, ploughshare mixing machine etc.Mixing roll 50 possesses: be used to accommodate by the columnar main part 52 of mixing thing (for example the iron ore raw material 57), through turning axle 54 rotations a plurality of agitating vanes 53, make the driving part (not shown) of turning axle 54 rotations, the raw material throw-in part 55 that constitutes with funnel etc. by the raw material input of reverse tapered shapes, the delivery section such as travelling belt 56 that are used to carry iron ore raw material 57.
In the mixing roll 50 of said structure, the iron ore raw material 57 that transports through delivery section 56 falls from the end of delivery section 56, drops in the main part 52 of mixing rolls 50 from raw material throw-in part 55.When this raw material drops into, from after the mixing nozzle 70 stated binder aqueous solution is added to the iron ore raw material 57.Putting into iron ore raw material 57 in the main part 52 through be that the agitating vane 53 that the center is rotated is stirred with turning axle 54 on one side, advances to prescribed direction (for example the left of Fig. 5 to) in main part 52 in one side.Thus, iron ore raw material 57 and binder aqueous solution are carried out mixing, generate the mixing thing (for example particle diameter is hundreds of μ m～several mm) of the regulation particle diameter of the granulation that is fit to the back segment granulating working procedure.This mixing thing is discharged from the relief outlet (not shown) of main part 52, flow to tablets press.In this embodiment, the structure and the addition means that in above-mentioned mixing roll 50, tackiness agent are added to the tackiness agent adding set in the iron ore raw material 57 have characteristic.
Here, at first tackiness agent is described.Tackiness agent is the granulation treatment agent that adopts in order the iron ore raw material that contains the micro mist iron ore to be carried out granulation handle.As this tackiness agent, the granulation property in the back segment granulating working procedure that improves above-mentioned mixing operation preferably adopts the polyacrylic dispersion agent, to guarantee the dispersiveness of the particulate of iron ore raw material than the highland.
As above-mentioned tackiness agent, for example be fit to use the granulation treatment agent of putting down in writing in the TOHKEMY 2003-155524 communique (polyacrylic dispersion agent).This granulation treatment agent is to contain the treatment agent that the clay dispersion ability is the water-soluble high-molecular compound more than 0.5.This macromolecular compound contains carboxyl and/or its salt, and number-average molecular weight is in the scope more than 500 and below 20000, and the polydispersity of representing with weight-average molecular weight/number-average molecular weight can be in the scope more than 1.2 and below 12.0.More particularly, above-mentioned macromolecular compound for example is the part of the carboxyl that contained from (a) ROHM, (b) ROHM or all is selected from least a neutralization among sodium, potassium, calcium, the ammonia and at least a compound selected the polyacrylate that obtains.
Through with such polyacrylic dispersion agent as tackiness agent; Add in the iron ore raw material that contains the iron ore micro mist; Can make in this raw material that micro mist is impartial to be disperseed, thereby micro mist can not solidify each other to each other, can make the dispersive micro mist attached to around the nuclear particle (coarse grain).So, when the iron ore raw material that contains micro mist is carried out granulation (simulation particleization or prilling), make the dispersive micro mist attached to the effect around the nuclear particle through highly keeping the dispersiveness of the micro mist in this raw material, can improving.Thereby, can carry out suitable granulation (simulation particleization or prilling) to the iron ore raw material, can improve granulation property.
Then, refer again to Fig. 5, tackiness agent adding set and addition means in the mixing roll 50 of this embodiment are described.As shown in Figure 5, the tackiness agent adding set possesses: be used to supply with tackiness agent stoste tackiness agent supply-pipe 63, be used to supply with the water-supply pipe 66 of moisture adjustment water (interpolation water), the gear (not shown) that is connected mixing nozzle 70 on the leading section of this tackiness agent supply-pipe 63 and water-supply pipe 66, the flow of tackiness agent supply-pipe 63 and water-supply pipe 66 is controlled.
Tackiness agent supply-pipe 63 is the pipe arrangements that are used for supplying with to mixing nozzle 70 from tackiness agent supply source (for example the tackiness agent original fluid container is not shown) tackiness agent stoste.In the way of tackiness agent supply-pipe 63, be provided with regulating valve 61 and magnetic flow meter 62.The flow of 62 pairs of mobile tackiness agent stostes in tackiness agent supply-pipe 63 of magnetic flow meter carries out instrumentation; Regulating valve 61 is according to the instrumentation result and the information such as raw material moisture rate or raw material input amount of magnetic flow meter 62, the regulation flow that the flow control of the tackiness agent stoste in the tackiness agent supply-pipe 63 is being set.Have, the tackiness agent supply-pipe 63 of this embodiment is supplied with tackiness agent stoste as tackiness agent of the present invention again, but the present invention is not limited to this example, for example, also can supply with the binder aqueous solution that in advance tackiness agent stoste is diluted to normality.
Water-supply pipe 66 is to be used for from the water supply source (for example water pot is not shown) supplied with pipe arrangement from the interpolation water of the concentration that is used to adjust binder aqueous solution to mixing nozzle 70.In the way of water-supply pipe 66, be provided with regulating valve 64 and magnetic flow meter 65.The flow of 65 pairs of mobile interpolation water in water-supply pipe 66 of magnetic flow meter carries out instrumentation; Regulating valve 64 is according to the instrumentation result and the information such as raw material moisture rate or raw material input amount of magnetic flow meter 65, the regulation flow that the flow control of the interpolation water in the water-supply pipe 66 is being set.
Have, the tackiness agent adding set also possesses gear (not shown) again, and instrumentation is dropped into raw material moisture and the input amount of the iron ore raw material 57 in the mixing roll 50 and the data input control device that obtains.Gear is obtained information such as above-mentioned raw material moisture rate or raw material input amount based on the data of input, calculates the manipulated variable of regulating valve 61 or regulating valve 64, indicates the aperture of each variable valve.
As previously mentioned, raw material moisture often changes because of keeping state or weather, the material fiting ratio etc. of iron ore raw material.The gear of the tackiness agent adding set of this embodiment is controlled with the interpolation water yield the former liquid measure of tackiness agent that supplies in the mixing nozzle 70 through change dominant discharge variable valve 61 or regulating valve 64 according to this raw material moisture accurately.In addition,, measure down through setting from the letting out of raw material tank about the raw material input amount, but weight feed iron ore raw material basically, but the change that can produce some amounts in the reality.
Thereby, before dropping into mixing roll 50, for example,, the raw material input amount of delivery section 56 (travelling belt etc.) is measured through mensuration mechanisms such as belt scales, also can control the former liquid measure of tackiness agent accurately and add the water yield according to this measured value.
Through above-mentioned tackiness agent supply-pipe 63, water-supply pipe 66 and flow control mechanism thereof, can the subtend mixing nozzle the 70 tackiness agent stostes supplied with and the flow that adds water control accurately.So, can the concentration and the addition that add the binder aqueous solution the iron ore raw material 57 from mixing nozzle 70 to be controlled accurately according to the raw material moisture and the raw material input amount of iron ore raw material 57.
Then, be that the function of mixing nozzle 70 describes to the characteristic of this embodiment.Structure about mixing nozzle 70 is narrated in the back.Tackiness agent stoste and water that mixing nozzle 70 has being supplied with separately respectively by above-mentioned tackiness agent supply-pipe 63 and water-supply pipe 66 carry out the blended function and will be sprayed at the function in the iron ore raw material of putting in the mixing roll 50 57 through the binder aqueous solution that this mixing obtains.Further, since the mixing nozzle outlet nozzle 70 side is opened, not as a static mixer, and that liquid water is added to the adhesive occurs in a static mixer Interference another, thereby balancing the pressure between the crash, so that even the supply changes, there is no control delay, flow stability.Through adopting said mixing nozzle 70, be fit to carry out the tackiness agent addition means of this embodiment.
Mixing nozzle 70 is arranged near the raw material throw-in part 55 of mixing roll 50, to dropping into the iron ore raw material 57 direct spray adhesive aqueous solution in this raw material throw-in part 55.Here, what is called sets near the raw material throw-in part 55 of mixing nozzle, and being meant can be directly to putting into the position arbitrarily of the iron ore raw material 57 spray adhesive aqueous solution the mixing roll 50 from mixing nozzle 70.For example; Like diagram; Can mixing nozzle 70 be configured in neighbouring (mixing nozzle 70 and raw material throw-in part 55 isolating positions) of raw material throw-in part 55, though not shown in addition, also can mixing nozzle 70 be arranged on the position arbitrarily (for example funnel side) of raw material throw-in part 55.
So, through mixing nozzle 70 being located near the raw material throw-in part 55 of mixing roll 50, can with through mixing nozzle 70 blended binder aqueous solutions directly the iron ore raw material 57 in putting into raw material throw-in part 55 spray interpolation.Thus, the tackiness agent adding set of this embodiment can improve the responsiveness to the change of the raw material moisture of iron ore raw material 57, can tackle the variation of binder concn and addition rapidly.
That is to say; As stated, in the addition means that adopts Fig. 2 and static agitation machine 10 shown in Figure 3, when raw material moisture changes; Hope flow, make through the former liquid measure of static agitation machine 10 blended tackiness agents and add the water yield to change through instant change pipe arrangement 13,16., have the 1st following problem: in the properties of piping system, the unsuitable binder aqueous solution of concentration that remains in the pipe arrangement 5 in the downstream side that is arranged in static agitation machine 10 all can be added to the iron ore raw material in any case.In addition, there is a second problem as described below: If the flow pipe 13 and 16 and adding a binder liquid water flow (pressure) is changed, both in the static mixer 10 is another Interference between the two pressure balance collapse, thereby stabilizing the adhesive to the desired concentration in an aqueous solution until the very time.Because of these problems, can not add the binder aqueous solution that concentration is fit to the raw material moisture after the change immediately, poor for the responsiveness of the change of raw material moisture.
Relative therewith; In the tackiness agent addition means of this embodiment; With tackiness agent stoste with add hydromining with separately pipe arrangement 63,66 at (tackiness agent point of addition near) near the raw material throw-in part 55 that is transported to mixing roll 50 under the state of dominant discharge accurately; Through mixing, directly add in the iron ore raw material 57 with mixing nozzle 70.For example, when raw material moisture rises, make the flow of the interpolation water in the water-supply pipe 66 reduce appropriate amount through regulating valve 64.In addition, when raw material moisture reduces, make the flow of the interpolation water in the water-supply pipe 66 increase appropriate amount through regulating valve 64.Thus; Mixing nozzle 70 mixes with interpolation water adjusted the tackiness agent stoste behind the flow separately accurately through tackiness agent supply-pipe 63 and water-supply pipe 66; High precision and promptly generate the binder aqueous solution that concentration is fit to the raw material moisture after the change is added then.
Have again; In above-mentioned for the increase and decrease of raw material moisture; To flow through the interpolation water in the regulating valve 64 adjustment water-supply pipes 66; The method of control tackiness agent input amount is illustrated, but as other method, also can control the tackiness agent input amount through the flow that utilizes the tackiness agent stoste in the regulating valve 61 adjustment tackiness agent supply-pipes 63.But; In such cases; Drop into the amount of binder change of the net weight in the mixing roll 50, also change, the therefore preferred method that adopts the flow that pass through the interior interpolation water of regulating valve 64 adjustment water-supply pipes 66 of front explanation with respect to the interpolation ratio of the tackiness agent of raw material.
According to the above; The tackiness agent addition means of this embodiment can not adopt for the static agitation machine 10 of responsiveness difference of change that changes corresponding binder concn with above-mentioned raw materials moisture as mixed organization; And employing mixing nozzle 70; Can tackle the change of raw material moisture rapidly thus, change binder concn immediately, the responsiveness of binder concn control is good.Thereby, have and can control binder concn accurately, add the effect of the best binder aqueous solution of concentration in the raw material moisture after the earthquake rapidly.
In addition, in mixing nozzle 70,, generate the uniform binder aqueous solution of concentration, directly the iron ore raw material 57 that drops into is sprayed this binder aqueous solution from mixing nozzle 70 through before interpolation, being pre-mixed tackiness agent stoste and adding water.Thus, has the effect that to add the uniform binder aqueous solution of concentration to iron ore raw material 57 equably.
In addition, owing to be not the main part 52 interpolation binder aqueous solutions from mixing roll 50, but binder aqueous solutions are added to iron ore raw material 57 in the position before dropping into mixing roll 50.Therefore, can also prevent adhesive coating 4, and hinder the interpolation of binder aqueous solution, the problem that can not evenly add because of main part 2 inner peripheral surfaces that are formed at mixing roll shown in Figure 11.That is to say, in this embodiment, do not add binder aqueous solutions, but from being configured near the mixing nozzle 70 the raw material throw-in part 55, to investment subject portion 52 in, add binder aqueous solution in before the iron ore raw material 57 from main part 52.Therefore, even for example at the main part 52 inner peripheral surfaces formation adhesive coating 4 of mixing roll 50, adhesive coating 4 does not hinder the even interpolation of tackiness agent yet, can add tackiness agent equably to iron ore raw material 57.
[the 4. concrete formation of mixing nozzle]
Then, with reference to Fig. 6, the concrete formation of the mixing nozzle 70 of tackiness agent addition means that be fit to realize above-mentioned embodiment is elaborated.Fig. 6 is the longitudinal section of formation example of mixing nozzle 70 of the tackiness agent adding set of this embodiment of expression.
As shown in Figure 6, mixing nozzle 70 has the dual cylindrical structure that is made up of outer nozzle 71 and inner nozzle 72.Outer nozzle 71 is the bigger cylinder parts of diameter, inner nozzle 72 cylinder part littler than outer nozzle 71 that be diameters.Inner nozzle 72 is provided in the inside of outer nozzle 71 with the mode of xsect on concentric(al) circles.Have, in the example of this mixing nozzle 70, mixing nozzle is dual cylindrical structure, but also is not limited to cylindrical structure, also can be polygonal barrel structure again.
The leading section of above-mentioned tackiness agent supply-pipe 63 connects the influx 74 that forms with the side of outer spray nozzle 71 and is connected.Tackiness agent supply-pipe 63 is connected with the lateral vertical ground of outer nozzle 71 in Fig. 6, but this connection angle does not have special qualification.In addition, in the example of Fig. 6, be that 1 tackiness agent supply-pipe 63 is connected the structure on the outer nozzle 71 at 1 place, but also be not limited to said example, for example, also can many tackiness agent supply-pipes 63 be connected the many places of the circumferential direction of outer nozzle 71.Thus, can in outer nozzle 71, supply with tackiness agent more equably.
In addition, under the viscosity ratio condition with higher of tackiness agent stoste, shown in the example of Fig. 6, merely, supply in the outer nozzle 71 from the tackiness agent supply-pipe 63 tackiness agent stoste B that hangs down., same with the spraying of adding water W under the lower situation of the viscosity ratio of tackiness agent stoste B (for example, in advance during the quantitative interpolation water of hybrid regulatory etc.), also can adopt spray nozzle that tackiness agent stoste B is supplied with to outer nozzle 71 internal sprayings.
On the other hand, the leading section of water-supply pipe 66 is connected with inner nozzle 72 with being communicated with.In the example of Fig. 6, be connected with at the leading section of water-supply pipe 66 and be used to pipe box 73 that caliber is dwindled, in addition, be connected with at the leading section of this pipe box 73 that to add the spray nozzle that water uses be inner nozzle 72.Through above-mentioned formation, can be with the interpolation water W that supplies with by water-supply pipe 66 from the jet hole 75 of the leading section of inner nozzle 72 to outer nozzle 72 internal sprayings.Have again; Also be not limited to like diagram and form the example that inner nozzle 72 constitutes through jet element is installed at the leading section of water-supply pipe 66 separately; For example; Also can the leading section of water-supply pipe 66 itself be played a role as inner nozzle 72 through leading section and the inner nozzle 72 that constitutes water-supply pipe 66 integratedly.
In addition, the inside of the leading section of water-supply pipe 66 and inner nozzle 72 outer spray nozzle 71 is configured to the direction identical with the direction of principal axis of outer nozzle 71, is provided with the jet hole 75 of the structure that makes interpolation water W spraying diffusion at the leading section of inner nozzle 72.The position of the jet hole 75 of the leading section of inner nozzle 72 is in the downstream side (downside) of the influx 74 of the outer nozzle 71 that connects tackiness agent supply-pipe 63, and is configured in the nozzle inboard (upside) of jet hole 76 of the leading section of outer nozzle 71.
Through above-mentioned configuration, make from the jet hole 75 of inner nozzle 72 and to add water W towards the below, to the interior side spray diffusion of outer nozzle 71, collide with tackiness agent stoste B that internal surface along outer nozzle 71 hangs and mix.Through the interpolation water W that is sprayed being collided with tackiness agent and mixing, tackiness agent is blended in adds in the water.Thus, can in outer nozzle 71, supply with tackiness agent more equably.
Then, the work to the mixing nozzle 70 of Fig. 6 with above formation describes.Make the tackiness agent stoste B that supplies with via tackiness agent supply-pipe 63 in outer nozzle 71, spray (inflow), hang along the inner peripheral surface of outer nozzle 71 from the influx 74 of outer nozzle 71.On the other hand, the interpolation water W that supplies with via water-supply pipe 66 is spread to outer nozzle 71 internal sprayings from the jet hole 75 of inner nozzle 72.Consequently, the lower side of the inside of outer spray nozzle 71, above-mentioned interpolation water W and tackiness agent stoste B by the spraying diffusion mixes through collision, generates the binder aqueous solution M of normality.Spraying through above-mentioned interpolation water W is pressed, and this binder aqueous solution M is sprayed towards iron ore raw material 57 from the leading section jet hole 76 of outer nozzle 71.Thus, mixing nozzle 70 generates the uniform binder aqueous solution M of concentration near the point of addition (the raw material throw-in part 55) of tackiness agent, can be sprayed in the iron ore raw material 57.
Then, with reference to Fig. 7, another formation of the mixing nozzle 70 of tackiness agent addition means that be fit to realize above-mentioned embodiment is described.Fig. 7 is the longitudinal section of formation of mixing nozzle 70 of tackiness agent adding set of the change example of this embodiment of expression.
As shown in Figure 7, the mixing nozzle 70 of change example is also same with the mixing nozzle 70 of above-mentioned Fig. 6, has the dual cylindrical structure that is made up of outer nozzle 81 and inner nozzle 82.Outer nozzle 81 is the bigger cylinder parts of diameter, inner nozzle 82 cylinder part littler than outer nozzle 81 that be diameters.Inner nozzle 82 is provided in the inside of outer nozzle 81 with the mode of xsect on concentric(al) circles.
In the example of Fig. 7, constitute the leading section of tackiness agent supply-pipe 63 integratedly with inner nozzle 82.That is to say that the internal diameter and the external diameter of tackiness agent supply-pipe 63 and inner nozzle 82 are identical footpath, the leading section of tackiness agent supply-pipe 63 plays a role as inner nozzle 82, and the mouth of pipe of tackiness agent supply-pipe 63 plays a role as jet hole 85.Said formation is useful when the viscosity ratio of tackiness agent stoste B is higher for example, and the tackiness agent stoste B that is supplied with by tackiness agent supply-pipe 63 hangs downwards through deadweight from jet hole 85 ejections of the inner nozzle 82 of its front end.Have, said here jet hole 82 refers to the ejiction opening that is used to spray liquid again, is not limited to be used for the aperture with liquid spray.
Have, the formation of the leading section of tackiness agent supply-pipe 63 and inner nozzle 82 is not limited to the formation of above-mentioned Fig. 7 again.For example, also can be through the jet element of tackiness agent stoste ejection usefulness is installed and is played a role at the leading section of tackiness agent supply-pipe 63 separately as inner nozzle 82.For example; When the viscosity ratio of tackiness agent stoste B is low (for example; In advance during the quantitative interpolation water of hybrid regulatory etc.); Also can the spray nozzle (not shown) as inner nozzle 82 be installed at the leading section of tackiness agent supply-pipe 63, make tackiness agent stoste B from the jet hole 85 of this spray nozzle to outer nozzle 81 internal sprayings.
On the other hand, the leading section of water-supply pipe 66 is connected on the opening 84 on the side that is formed at outer nozzle 81 with connecting.Say that at length diameter is connected than water-supply pipe 66 big pipe connectings 87 on the peripheral part of opening 84 of outer nozzle 81.Water-supply pipe 66 is configured in the state of the inside of pipe connecting 86 with its leading section, is installed in the pipe connecting 87 via flange 88.At this moment; The leading section of water-supply pipe 66 is configured in and the vertical direction of the extending direction of outer nozzle 81, is connected with the lateral vertical ground of outer nozzle 81, but also is not limited to said closure; As long as can be, can be closure arbitrarily with adding water W to tackiness agent stoste B spraying.Thus, can the leading section of water-supply pipe 66 be connected via pipe connecting 87 and flange 88 on the periphery of opening 84 of outer nozzle 81.
In addition, be equipped with to be used to make at the leading section of said water-supply pipe 66 and add the spray nozzle 90 of water W to outer nozzle 81 internal sprayings.At length say, on the leading section of water-supply pipe 66, be connected with the pipe box 89 that caliber is dwindled, and then, be connected with at the leading section of this pipe box 89 and add the spray nozzle 90 that water is used.Spray nozzle 90 is configured near the opening 84 of above-mentioned outer nozzle 81.Through said formation, opening 84 places of outer spray nozzle 81, can make the interpolation water W that supplies with by water-supply pipe 66 from the jet hole 91 of the leading section of spray nozzle 90 to outer nozzle 81 internal sprayings.
In addition, the inside of the leading section of tackiness agent supply-pipe 63 and inner nozzle 82 outer spray nozzle 81 is configured in the identical direction of direction of principal axis (for example vertical direction) with outer nozzle 81.The nozzle of the jet hole 86 of the leading section of the position outer spray nozzle 81 of the jet hole 85 of the leading section of inner nozzle 82 inboard (upside), and, be configured in the upstream side (upside) of the opening 84 of the outer nozzle 81 that connects water-supply pipe 66.Through said configuration; Spray nozzle 90 from the opening 84 that is configured in outer nozzle 81; Make and add water W and spray to horizontal direction, the diffusion of being sprayed of the inboard of the interpolation water W outer spray nozzle 81 that this is sprayed mixes with the tackiness agent stoste B collision that jet hole 85 from inner nozzle 82 hangs.
Have again, in the example of Fig. 7, be that 1 water-supply pipe 66 is connected the structure on the outer nozzle 81 at 1 place, but be not limited to said example, for example, also can many water-supply pipes 66 be connected on a plurality of positions of circumferential direction of outer nozzle 81.Thus, can in outer nozzle 81, supply with interpolation water W more equably.
Then, the work to the mixing nozzle 70 of Fig. 7 with above formation describes.The tackiness agent stoste B that supplies with via tackiness agent supply-pipe 63 sprays (inflow) from the jet hole 85 of inner nozzle 82 in outer nozzle 81, hang towards the below.On the other hand, the jet hole 91 that makes the interpolation water W that supplies with via water-supply pipe 66 spray nozzle 90 from the opening 84 that is configured in outer nozzle 81 spreads to outer nozzle 81 internal sprayings towards the above-mentioned tackiness agent stoste B that hangs.Consequently, the lower side of the inside of outer spray nozzle 81, above-mentioned mixed through colliding by the interpolation water W of spraying diffusion and tackiness agent stoste B, the binder aqueous solution M of generation normality.Spraying through above-mentioned interpolation water W is pressed, and this binder aqueous solution M is sprayed towards iron ore raw material 57 from the jet hole 86 of the leading section of outer nozzle 81.Thus, mixing nozzle 70 generates the uniform binder aqueous solution M of concentration near the point of addition (the raw material throw-in part 55) of tackiness agent, can be sprayed in the iron ore raw material 57.
More than, with reference to Fig. 6 and Fig. 7, the concrete structure of the mixing nozzle 70 of this embodiment is illustrated.According to the mixing nozzle 70 of this embodiment, through near the raw material throw-in part 55 of mixing roll 50, generate the uniform binder aqueous solution M of concentration, can be sprayed at equably in the iron ore raw material 57.In addition, also high with respect to the responsiveness of the change of this binder concn according to the change of raw material moisture change binder concn the time, the uniform binder aqueous solution of controlling concn accurately.
At length saying, in the tackiness agent addition means of above-mentioned Fig. 2 and Fig. 3, is mixed adhesive stoste and the mode of adding water in airtight static agitation machine 10.Therefore, be accompanied by the flow change of tackiness agent stoste or interpolation water, when the tackiness agent stoste in the static agitation machine 10 is collapsed with the pressure equilibrium of adding water, the very time taking problem of the stabilization of reaching arranged.Relative therewith, in this embodiment, be mixed adhesive stoste B and the mode of adding water W in the mixing nozzle 70 that opens wide to atmosphere.So, in mixing nozzle 70 to tackiness agent stoste B or add water W and do not exert pressure, can be in opening pressure mixed adhesive stoste B with add water W.Thereby, can tackle the change that changes corresponding binder concn with raw material moisture rapidly, the concentration of the binder aqueous solution of generation and sprinkling is also even.
[5. effect]
More than, the tackiness agent adding set and the tackiness agent addition means of the mixing roll 50 that is applicable to this embodiment detailed.According to this embodiment; Near (point of addition of tackiness agent) configuration mixing nozzle 70 raw material throw-in part 55 of mixing roll 50; Adopt pipe arrangement 63,66 separately, in High Accuracy Control under the state of flow separately, with tackiness agent stoste with add water supply to mixing nozzle 70.Then, through mixing nozzle 70, mixed adhesive stoste and interpolation water generate binder aqueous solution, and binder aqueous solution is directly added in the iron ore raw material 57 that drops in the mixing roll 50.
This mixing nozzle 70 for before interpolation in advance equably mixed adhesive stoste have dual cylindrical structure with adding water.Thus, mixing nozzle 70 is sprayed to tackiness agent stoste B through the inside of outer spray nozzle 71,81 and is added water W, makes tackiness agent stoste B and interpolation water W collide mixing, can generate the uniform binder aqueous solution M of concentration, is sprayed in the iron ore raw material 57.
Through above formation; The tackiness agent addition means of this embodiment can add the uniform binder aqueous solution of concentration in the iron ore raw material equably, and can according to the change of raw material input amount or raw material moisture etc. accurately control promptly add the concentration and the addition of the tackiness agent in the raw material to.
That is to say that as previously mentioned, raw material moisture is because of the keeping state or the change often such as weather, material fiting ratio of iron ore raw material.According to this embodiment, can control the former liquid measure of tackiness agent accurately and add the water yield according to the change of this raw material moisture.In addition, about the raw material input amount, also can be before dropping into mixing roll 50, for example, the raw material input amount of the iron ore raw material carried through delivery section 56 is measured, according to this former liquid measure of measured value High Accuracy Control tackiness agent and add the water yield.In this embodiment, can be that raw material input amount or raw material moisture are adjusted the former liquid measure of tackiness agent accurately and added the water yield so, can add the binder aqueous solution of optimum concn according to the change essential factor.
At length say; With tackiness agent stoste with add the pipe arrangement of water through separately and be transported to the mixing nozzle 70 that is configured in front of the point of addition; Thereby can tackle the raw material moisture of the iron ore raw material of putting in the mixing roll 50 57 or the change of input amount; Can be rapidly and generate concentration accurately and be fit to raw material moisture or the binder aqueous solution of raw material input amount after the change, can add in this iron ore raw material 57.So; Like Fig. 2 and addition means shown in Figure 3; Can prevent when the change of binder concn, the unsuitable binder aqueous solution of concentration that remains in the pipe arrangement 5 to be added in the raw material; Even and do not use the low static agitation machine 10 of responsiveness for the change of binder concn, and adopt the high mixing nozzle of this responsiveness 70, also can generate the uniform binder aqueous solution of concentration rapidly.Thereby; In this embodiment; When changing according to the change of raw material moisture or raw material input amount and to the concentration of adding the binder aqueous solution in the raw material to, can be rapidly and control the concentration of this binder aqueous solution, the time-delay that can not produce Fig. 2 and method shown in Figure 3 accurately.
So; The mixing roll 50 of this embodiment can be corresponding immediately with the raw material operational throughput or the raw material moisture that at every moment change; Accurately the concentration and the addition that add the binder aqueous solution in the iron ore raw material to are adjusted on one side, to iron ore raw material and binder aqueous solution carry out mixing on one side.Thus, the mixing thing of making through this mixing roll 50 can or not make the decline of granulation property because of tackiness agent too much forms pulp-like because of tackiness agent is very few, can guarantee suitable granulation condition.Thereby, can improve the granulation property in the granulating working procedure of tablets press 24,35 of back segment, guarantee the granulation quality equably.So; According to this embodiment, irrelevant with the change of raw material operational throughput or raw material moisture, can under the state of keeping suitable granulation condition, continue mixing and granulating working procedure; Thereby fault such as can not cause that equipment stops, can tackling the change of raw material moisture or the variation of raw material treatment capacity accurately.Consequently, high-quality granulation thing can be stably made, the stabilization of the sintering manufacturing process of sinter machine 40 can be sought.
In addition, according to this embodiment, be not main part 52 from mixing roll 50, but from above-mentioned mixing nozzle 70 directly to dropping into the iron ore raw material 57 spray adhesive aqueous solution before the mixing roll 50.So; Even the inner peripheral surface at the main part 52 of mixing roll 50 forms adhesive coating 4 (with reference to Fig. 1); Also can prevent to hinder the sprinkling of tackiness agent because of this adhesive coating 4; Can add the uniform binder aqueous solution of concentration equably to the iron ore raw material 57 before dropping into, therefore can in mixing roll 50, carry out mixing uniformly.
In addition, about the residence time of the iron ore raw material in the mixing roll 50,, the uniform binder aqueous solution of concentration is blended in the iron ore raw material integral body equably even length also is the short period of time about 3 minutes usually.In this embodiment; When adding binder aqueous solution with mixing roll 50; Through mixing nozzle 70, on one side the uniform binder aqueous solution of concentration is sprayed in the iron ore raw material integral body of input equably, carry out mixing on one side; Therefore even in the above-mentioned short period of time, also can thorough mixing binder aqueous solution and iron ore raw material.
In addition, to the micro mist being the iron ore raw material of main body when carrying out granulation, need be before granulation in advance with mixing roll reliably with tackiness agent and iron ore raw material mixing after, should drop into tablets press by mixing thing.In the tackiness agent addition means of above-mentioned patent documentation 1, in tablets press (drum mixer) respectively spray adhesive with add water, if but respectively spray adhesive with add water, then can not the uniform tackiness agent of concentration be added in the raw material equably.Based on this point, the tackiness agent addition means of this embodiment is suitable at the leading portion of granulating working procedure being that the iron ore raw material of main body carries out fully mixing mixing roll 50 with the micro mist.
In addition, as the tackiness agent that this embodiment adopts, in order to improve granulation property, employing can be guaranteed the polyacrylic dispersion agent of the dispersiveness of the micro mist (particulate) in the iron ore raw material than the highland.The tackiness agent addition means of this embodiment can be suitable for containing the tackiness agent (granulation treatment agent) of said polyacrylic dispersion agent.That is to say, can the uniform tackiness agent of concentration be added in the raw material equably, thereby make micro mist attached to the effect around the nuclear particle (coarse grain) through utilizing tackiness agent that the micro mist of iron ore raw material is disperseed, can improving.Thereby, can compatibly carry out granulation (simulation particleization or prilling) to the iron ore raw material that contains micro mist, can compatibly make the granulation thing of suitable granularity (for example particle diameter is the scope of a few mm～10mm).
More than, specify with reference to the embodiment of accompanying drawing, but the present invention is not limited to said example the best of the present invention.Undoubtedly; So long as have the personnel of the ABC of the technical field under the present invention; Just can in the category of the described technological thought of claims, associate various change examples or revise example, these change example or revise example and will of course be appreciated that to belonging to technological category of the present invention.
For example; In the above-described embodiment; To tackiness agent adding set of the present invention and addition means are applied to be located at the simulation granulation production line 20 of agglomerating plant shown in Figure 4, the example of mixing roll 23,34 on the grain granulation production line 30 is illustrated, but the present invention is not limited to said example.Tackiness agent adding set of the present invention and addition means also can be applicable to ironmaking such as iron ore raw material are carried out mixing mixing roll arbitrarily with raw material except that can be used for above-mentioned mixing roll 23,34.
In addition; In the above-described embodiment, through utilizing mixing nozzle 70 mixed adhesive stostes and add water, generated hope the binder aqueous solution of concentration; But; For example, also can be through mixing binder solution and the water be diluted to normality in advance, generate hope the binder aqueous solution of concentration.
In addition, the structure of mixing nozzle 70 is not limited to Fig. 6 and example shown in Figure 7, if equably mixed adhesive with add water, but just design alteration becomes structure arbitrarily.
Embodiment
(embodiment 1)
As shown in Figure 5, below illustrate and adopted the mixing roll that possesses the tackiness agent adding set, the embodiment that has adopted mixing nozzle shown in Figure 6.The iron ore raw material average out to 200dry-ton/h of input grain granulation production line, raw material moisture ratio average out to 8%, employing polyacrylic dispersion agent so carry out granulation as tackiness agent.(here; With MV iron ore raw material and raw material moisture ratio are shown respectively, as previously mentioned, although be because quantitatively let out down the iron ore raw material from raw material tank; But in fact produce the change of some amounts, raw material moisture changes because of taking care of state and weather, proportioning raw materials etc.)
Carried out granulation by this condition, the result has eliminated the control lag of the binder concn that the binder aqueous solution by remaining in the pipe arrangement that in existing installation shown in Figure 3, takes place causes, can supply with by set(ting)value.Therefore, even when the adhesive solids composition than Rs is 0.2% high density, also continuous operation stably, make granularity and the suitable granulation thing of intensity.
(embodiment 2)
The mixing nozzle shown in Figure 7 in adopting the present invention; When no matter under the condition identical, making an experiment with embodiment 1; Still equally when the adhesive solids composition than Rs is 0.2% high density; Do not produce slurry, granularity and the suitable granulation thing of intensity are made in continuous operation stably.
(comparative example)
Adopt existing installation shown in Figure 3, same with embodiment 1, put into iron ore raw material average out to 200dry-ton/h in the grain granulation production line, raw material moisture ratio average out to 8%, adopt the polyacrylic dispersion agent as tackiness agent, so carry out granulation.In this case, even the adhesive solids composition is 0.1% than Rs, also the several years take place because of producing the significant trouble that slurry causes, and the control lag of the binder concn that is caused by the binder aqueous solution that remains in the pipe arrangement is an important problem.
Utilizability on the industry
Through the granulation with the iron ore raw material is that example is carried out above-mentioned detailed explanation, and the present invention that hence one can see that can use in the granulating working procedure of the iron ore raw material in the iron and steel manufacturing process.In addition, the present invention is not limited to the granulation of iron ore raw material, also can be used for the granulation of other material.
Nomenclature
The 4-adhesive coating, 23,34, the 50-mixing roll, 52-main part, 53-agitating vane, 54-turning axle, 55-raw material throw-in part; The 56-delivery section, 57-iron ore raw material, 61-regulating valve, 62-magnetic flow meter, 63-tackiness agent supply-pipe, 64-regulating valve; The 65-magnetic flow meter, 66-water-supply pipe, 70-mixing nozzle, 71, the 81-outer nozzle, 72, the 82-inner nozzle; The 74-influx, 75, the 85-jet hole, 76, the 86-jet hole, 84-opening, 87-pipe connecting; The 88-flange, the 90-spray nozzle, B-tackiness agent stoste, W-adds water, M-binder aqueous solution.

Claims (14)

1. tackiness agent addition means; It is characterized in that; In the granulation of iron ore raw material; To be arranged near the raw material throw-in part of mixing roll of iron ore raw material the tackiness agent supplied with respectively by tackiness agent supply-pipe and water-supply pipe and water mixes and outlet side opens wide mixing nozzle, the iron ore raw material the raw material throw-in part that drops into said mixing roll sprayed the binder aqueous solution that mixes by said tackiness agent and said water from said mixing nozzle.
2. tackiness agent addition means according to claim 1; It is characterized in that said mixing nozzle is by outer nozzle and is provided in the dual structure that the inner nozzle in the said outer nozzle constitutes, and on a side of said outer nozzle or said inner nozzle, connects said tackiness agent supply-pipe; On the opposing party's nozzle, connect said water-supply pipe; Through for the said tackiness agent of in said outer nozzle, supplying with by said tackiness agent supply-pipe, spray by the said water of said water-supply pipe supply, in said outer nozzle, mix said tackiness agent and said water; Generate said binder aqueous solution, said iron ore raw material is sprayed said binder aqueous solution from the jet hole of said outer nozzle.
3. tackiness agent addition means according to claim 2; It is characterized in that said tackiness agent supply-pipe is connected with influx on the side that is formed at said outer nozzle with connecting, be connected to said water-supply pipe and said inner nozzle connection; Through being ejected into the said tackiness agent in the said outer nozzle for said influx from said outer nozzle; From the jet hole of the said inner nozzle said water of spraying, said water is blended in the said tackiness agent, generate said binder aqueous solution.
4. tackiness agent addition means according to claim 2; It is characterized in that said water-supply pipe is connected with opening on the side that is formed at said outer nozzle with connecting, be connected to said tackiness agent supply-pipe and said inner nozzle connection; Through be ejected into the said tackiness agent in the said outer nozzle for jet hole from said inner nozzle; From the said opening of the said outer nozzle said water of spraying, said water is blended in the said tackiness agent, generate said binder aqueous solution.
5. according to each described tackiness agent addition means in the claim 1～4, it is characterized in that said tackiness agent is the polyacrylic dispersion agent.
6. the described tackiness agent addition means of each in the claim 1～5; It is characterized in that; The moisture that is contained according to said iron ore raw material or the input amount of the said iron ore raw material in the said mixing roll are controlled the arbitrary at least side's in said tackiness agent supply-pipe or the said water-supply pipe flow.
7. tackiness agent adding set; It is characterized in that; Possess the tackiness agent supply-pipe of in the tablets press of iron ore raw material, supplying with tackiness agent, water-supply pipe and the mixing nozzle of supplying with water; Said mixing nozzle is arranged near the raw material throw-in part of mixing roll of iron ore raw material, said tackiness agent and the said water of being supplied with respectively by said tackiness agent supply-pipe and said water-supply pipe is mixed, and the outlet side of said mixing nozzle opens wide; Said mixing nozzle sprays by said tackiness agent and said water the iron ore raw material in the raw material throw-in part that drops into said mixing roll and mixes and the binder aqueous solution of generation.
8. tackiness agent adding set according to claim 7; It is characterized in that said mixing nozzle is by outer nozzle and is provided in the dual structure that the inner nozzle in the said outer nozzle constitutes, and on a side of said outer nozzle or said inner nozzle, connects said tackiness agent supply-pipe; On the opposing party's nozzle, connect said water-supply pipe; Through for the said tackiness agent of in said outer nozzle, supplying with by said tackiness agent supply-pipe, spray by the said water of said water-supply pipe supply, in said outer nozzle, mix said tackiness agent and said water; Generate said binder aqueous solution, said iron ore raw material is sprayed said binder aqueous solution from the jet hole of said outer nozzle.
9. tackiness agent adding set according to claim 8; It is characterized in that said tackiness agent supply-pipe is connected with influx on the side that is formed at said outer nozzle with connecting, be connected to said water-supply pipe and said inner nozzle connection; Through being ejected into the said tackiness agent in the said outer nozzle for said influx from said outer nozzle; From the jet hole of the said inner nozzle said water of spraying, said water is blended in the said tackiness agent, generate said binder aqueous solution.
10. tackiness agent adding set according to claim 8; It is characterized in that said water-supply pipe is connected with opening on the side that is formed at said outer nozzle with connecting, be connected to said tackiness agent supply-pipe and said inner nozzle connection; Through be ejected into the said tackiness agent in the said outer nozzle for jet hole from said inner nozzle; From the said opening of the said outer nozzle said water of spraying, said water is blended in the said tackiness agent, generate said binder aqueous solution.
11. each the described tackiness agent adding set according in the claim 7～10 is characterized in that said tackiness agent is the polyacrylic dispersion agent.
12. according to each the described tackiness agent adding set in the claim 7～11; It is characterized in that; Also possesses control part; The moisture that said control part is contained according to said iron ore raw material or the input amount of the said iron ore raw material in the said mixing roll are controlled the arbitrary at least side's in said tackiness agent supply-pipe or the said water-supply pipe flow.
13. a mixing roll is characterized in that, possesses each the described tackiness agent adding set in the claim 7～12.
14. compounding process; It is characterized in that; Adopt each the described tackiness agent adding set in the claim 7～12, on one side to the iron ore raw material spray adhesive aqueous solution in the raw material throw-in part of putting into mixing roll, one side mixing said iron ore raw material in said mixing roll.
CN201080014538.8A 2009-03-31 2010-03-30 Adhesive adding method, device for adding binder, kneading machine and compounding process Active CN102378820B (en)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
JP2009-086593 2009-03-31
JP2009086593 2009-03-31
PCT/JP2010/056131 WO2010114152A1 (en) 2009-03-31 2010-03-30 Method for adding binder, device for adding binder, kneading machine and kneading method

Publications (2)

Publication Number Publication Date
CN102378820A true CN102378820A (en) 2012-03-14
CN102378820B CN102378820B (en) 2017-06-20

Family

ID=42828435

Family Applications (1)

Application Number Title Priority Date Filing Date
CN201080014538.8A Active CN102378820B (en) 2009-03-31 2010-03-30 Adhesive adding method, device for adding binder, kneading machine and compounding process

Country Status (5)

Country Link
JP (1) JP4659144B2 (en)
KR (1) KR101377279B1 (en)
CN (1) CN102378820B (en)
BR (1) BRPI1012754B8 (en)
WO (1) WO2010114152A1 (en)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN102853675A (en) * 2012-10-09 2013-01-02 李兴文 Iron ore powder sintering atomization spray system
CN106902704A (en) * 2017-01-06 2017-06-30 北京长峰金鼎科技有限公司 Wet mixing pelletizer interval adds paste-making method and uses its wet mixing pelletizer
CN115485402A (en) * 2020-05-07 2022-12-16 株式会社神户制钢所 Method for producing granulation water and method for producing iron ore pellets

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP7371766B2 (en) * 2020-04-15 2023-10-31 Ｊｆｅスチール株式会社 Method for manufacturing sintered ore

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB752978A (en) * 1953-07-29 1956-07-18 Duisburger Kupferiiutte Improvements in the granulation of fine grained materials
JPS62185838A (en) * 1986-02-10 1987-08-14 Kobe Steel Ltd Manufacture of coldbond briquette
CN1621541A (en) * 2004-12-14 2005-06-01 白俊卿 Process for preparing pellet from high-grade ironstone by using direct dry method
EP1733785A1 (en) * 2005-06-16 2006-12-20 JAG Jakob Prozesstechnik AG Apparatus and method for mixing a granular solid material or a liquid with a gas or a liquid

Family Cites Families (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH0611125B2 (en) * 1985-09-18 1994-02-09 日本電気株式会社 Same frequency relay system
JPH0230019Y2 (en) * 1985-10-17 1990-08-13
JPH08109386A (en) * 1994-10-07 1996-04-30 Mitsubishi Oil Co Ltd Jet-type emulsifying apparatus
JP2001254127A (en) * 2000-03-09 2001-09-18 Nkk Corp Method of producing sintered ore for blast furnace
JP3792583B2 (en) * 2001-09-07 2006-07-05 新日本製鐵株式会社 Granulation treatment agent for iron making and granulation treatment method using the same
JP4112450B2 (en) * 2002-08-21 2008-07-02 新日本製鐵株式会社 Method for granulating raw materials for iron making
JP4887729B2 (en) * 2005-10-21 2012-02-29 日新製鋼株式会社 Granulation method of sintering raw material
JP5181485B2 (en) * 2007-02-05 2013-04-10 Ｊｆｅスチール株式会社 Method for producing granulated and sintered raw materials

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB752978A (en) * 1953-07-29 1956-07-18 Duisburger Kupferiiutte Improvements in the granulation of fine grained materials
JPS62185838A (en) * 1986-02-10 1987-08-14 Kobe Steel Ltd Manufacture of coldbond briquette
CN1621541A (en) * 2004-12-14 2005-06-01 白俊卿 Process for preparing pellet from high-grade ironstone by using direct dry method
EP1733785A1 (en) * 2005-06-16 2006-12-20 JAG Jakob Prozesstechnik AG Apparatus and method for mixing a granular solid material or a liquid with a gas or a liquid

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN102853675A (en) * 2012-10-09 2013-01-02 李兴文 Iron ore powder sintering atomization spray system
CN102853675B (en) * 2012-10-09 2014-12-24 李兴文 Iron ore powder sintering atomization spray device
CN106902704A (en) * 2017-01-06 2017-06-30 北京长峰金鼎科技有限公司 Wet mixing pelletizer interval adds paste-making method and uses its wet mixing pelletizer
CN106902704B (en) * 2017-01-06 2018-04-06 北京长峰金鼎科技有限公司 Wet mixing pelletizer interval adds paste-making method and uses its wet mixing pelletizer
CN115485402A (en) * 2020-05-07 2022-12-16 株式会社神户制钢所 Method for producing granulation water and method for producing iron ore pellets
CN115485402B (en) * 2020-05-07 2024-05-28 株式会社神户制钢所 Method for producing pelleting water and method for producing iron ore pellets

Also Published As

Publication number Publication date
JPWO2010114152A1 (en) 2012-10-11
WO2010114152A1 (en) 2010-10-07
BRPI1012754B8 (en) 2019-12-17
BRPI1012754B1 (en) 2017-12-05
KR20110122760A (en) 2011-11-10
BRPI1012754A2 (en) 2016-04-05
KR101377279B1 (en) 2014-03-21
JP4659144B2 (en) 2011-03-30
CN102378820B (en) 2017-06-20

Similar Documents

Publication Publication Date Title
AU2010234908B2 (en) Pastillation of ammonium sulfate nitrate
US20240017226A1 (en) Spray Coated Fertilizer Composition
BG105040A (en) Method for producing fertilizer granulates containing urea and ammonium sulfatate
CN102378820A (en) Method for adding binder, device for adding binder, kneading machine and kneading method
CN106135644A (en) The feedstuff production method of composite particles carrier
CN110218114A (en) A kind of chemical fertilizer automation machining production line
JP5987958B2 (en) Method of adding binder to sintering raw material
CN101152622B (en) Granulation method
CN115427591B (en) Method for producing sintered ore
US20220370974A1 (en) Fluid bed granulator
JPH11262650A (en) Automatic granulating apparatus for powder
CN201135869Y (en) Again dropping and sprinkling leak type fine particle material blender
JP7148030B2 (en) Method for producing sintered ore and sintered ore
JP7024647B2 (en) Granulation method of raw material for sintering
JP7107472B1 (en) Pelletizing method for powder raw material and method for producing sintered ore
WO2022215584A1 (en) Particulate raw material granulation method and sintered ore production method
EP3478401A1 (en) Method for manufacturing of granular fillers using a granular nuclei, producing device and granulate obtained by this method
JP2008161793A (en) Powder dissolving apparatus and its method
CN206731016U (en) Mixing and stirring tank
SU1006526A1 (en) Method for pelletizing agglomeration batch
JPH02213424A (en) Manufacture of green pellet in manufacture of agglomerated ore
JPH02102724A (en) Production of pellet with vibrating mill
PL231358B1 (en) Continuous method for producing granulated washing agent
MX2007006076A (en) Process for the granulation of ammonium sulfate with urea and hemihydrated calcium sulfate.

Legal Events

Date Code Title Description
C06 Publication
PB01 Publication
C10 Entry into substantive examination
SE01 Entry into force of request for substantive examination
ASS Succession or assignment of patent right

Owner name: NIPPON STEEL + SUMITOMO METAL CORPORATION

Free format text: FORMER OWNER: SHIN NIPPON STEEL LTD.

Effective date: 20130402

C41 Transfer of patent application or patent right or utility model
TA01 Transfer of patent application right

Effective date of registration: 20130402

Address after: Tokyo, Japan

Applicant after: Nippon Steel Corporation

Address before: Tokyo, Japan

Applicant before: Nippon Steel Corporation

GR01 Patent grant
GR01 Patent grant
CP01 Change in the name or title of a patent holder

Address after: Tokyo, Japan

Patentee after: Nippon Iron & Steel Corporation

Address before: Tokyo, Japan

Patentee before: Nippon Steel Corporation

CP01 Change in the name or title of a patent holder