CN105907947B - It prepares the method for iron powder and prepares the system of iron powder - Google Patents
It prepares the method for iron powder and prepares the system of iron powder Download PDFInfo
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- CN105907947B CN105907947B CN201610395358.8A CN201610395358A CN105907947B CN 105907947 B CN105907947 B CN 105907947B CN 201610395358 A CN201610395358 A CN 201610395358A CN 105907947 B CN105907947 B CN 105907947B
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- 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
- C22B1/02—Roasting processes
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22F—WORKING METALLIC POWDER; MANUFACTURE OF ARTICLES FROM METALLIC POWDER; MAKING METALLIC POWDER; APPARATUS OR DEVICES SPECIALLY ADAPTED FOR METALLIC POWDER
- B22F9/00—Making metallic powder or suspensions thereof
- B22F9/16—Making metallic powder or suspensions thereof using chemical processes
- B22F9/18—Making metallic powder or suspensions thereof using chemical processes with reduction of metal compounds
- B22F9/20—Making metallic powder or suspensions thereof using chemical processes with reduction of metal compounds starting from solid metal compounds
-
- 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
- C22B5/00—General methods of reducing to metals
- C22B5/02—Dry methods smelting of sulfides or formation of mattes
- C22B5/18—Reducing step-by-step
Abstract
The invention discloses the method for preparing iron powder and the systems for preparing iron powder for implementing the method for preparing iron powder.Wherein, the method for preparing iron powder includes：Phosphorus-containing iron ore is subjected to break process, obtains iron ore particle；Magnetizing roast processing, material after being magnetized are carried out to iron ore particle using also Primordial Qi；Material carries out water quenching cooling after magnetizing, and through first order mill ore magnetic selection, obtains fine iron breeze；Fine iron breeze and reducing agent, lime stone, additive and binder are subjected to mixed processing, material after being mixed；Material carries out pelletizing processing after mixing, and obtains mixing pelletizing；Mixing pelletizing is subjected to reducing and smelting processing, obtains metallized pellet；Metallized pellet is subjected to second level mill ore magnetic selection processing, obtains iron powder, wherein the phosphorus grade of the iron powder is not higher than 0.05%.This method uses twin-stage " roasting-magnetic separation " flow processing phosphorus-containing iron ore, obtains the metal iron powder of the high and low phosphorus of Iron grade.
Description
Technical field
The present invention relates to the method for preparing iron powder, and implement the method above-mentioned for preparing iron powder prepare iron powder be
System.
Background technology
With the fast development of whole world steel and iron industry, high-quality iron ore resource largely consumes and tends to be exhausted, to ensure steel
The sustainable development of iron industry, it is imperative to the exploitation of iron ore resource inferior.China's high-phosphor oolitic hematite is extremely abundant,
About 3,500,000,000 tons or so of gross reserves, wherein about 16.8 hundred million tons of commercial reserves, about 18.2 hundred million tons of prospective reserves belong to phosphorus associated minerals, and red
Iron ore disseminated grain size is superfine mutually to be wrapped up layer by layer, it is necessary to which the dissociation of its annulus or roe can just be made by being milled to 30 μm or less or several microns
Nuclear monomer dissociates, and in addition phosphorus ore containing is mainly present in dispersed in iron mineral, and phosphorus is caused to be difficult to slough.Due to phosphorus content compared with
Height, traditional blast furnace process flow are also rarely employed, and high-phosphor oolitic hematite is caused never effectively to be developed for many years
It utilizes.
Currently, domestic utilized to high-phosphor oolitic hematite has carried out extensive work, it is mainly reflected in dephosphorization and carries two side of iron
Mainly there are the techniques such as reverse floatation process, magnetic roasting process, coal-based direct reduction-magnetic separation in face, but by dephosphorization rate and iron recycling
A set of technically reliable, reasonable in economy process is not found in the limitation of rate yet so far.
The method for developing and using high-phosphor oolitic hematite as a result, requires study.
Invention content
The present invention is directed at least solve one of the technical problems existing in the prior art.For this purpose, one object of the present invention
Be to propose a kind of method preparing iron powder, this method is handled by magnetizing roast magnetized after material, then mill ore magnetic selection, from
And the phosphorus in phosphorus-containing iron ore is removed, fine iron breeze is obtained, also, in magnetizing roast processing procedure, using gaseous reducing agent
To reduce the introducing of impurity in iron ore.
Thus, according to an aspect of the present invention, the present invention provides a kind of methods preparing iron powder.It is according to the present invention
Embodiment, this method include：Phosphorus-containing iron ore is subjected to break process, to obtain iron ore particle；Using also Primordial Qi to institute
It states iron ore particle and carries out magnetizing roast processing, so as to material after being magnetized；Wherein, the reducing gas includes carbon dioxide
And carbon monoxide, and the volume ratio of carbon dioxide and carbon monoxide is (10~100)：1；Material after the magnetization is subjected to water quenching
It is cooling, it is handled through first order mill ore magnetic selection, to obtain fine iron breeze；By the fine iron breeze and reducing agent, lime stone, addition
Agent and binder carry out mixed processing, so as to material after being mixed；Material after the mixing is subjected to pelletizing processing, so as to
To mixing pelletizing；The mixing pelletizing is subjected to reducing and smelting processing, to obtain metallized pellet；And by the metallization
Pelletizing carries out second level mill ore magnetic selection processing, to obtain iron powder, wherein the phosphorus grade of the iron powder is not higher than 0.05%.
The method according to the ... of the embodiment of the present invention for preparing iron powder, this method is handled by magnetizing roast magnetized after object
Material, then mill ore magnetic selection obtain fine iron breeze, also, in magnetizing roast processing procedure to remove the phosphorus in phosphorus-containing iron ore
In, using gaseous reducing agent, without matching coal quality reducing agent, to reduce the introducing of impurity in iron ore.This method is using double as a result,
Grade " roasting-magnetic separation " flow processing phosphorus-containing iron ore, the low-phosphorous fine iron breeze of the first order " roasting-magnetic separation " flow acquisition, second
The grade low-phosphorous fine iron breeze of " roasting-magnetic separation " flow processing obtains iron powder, realizes dephosphorization twice, can effectively remove in iron ore
Phosphorus obtains the metal iron powder of the high and low phosphorus of Iron grade, can be used as high-quality steel-making coolant after briquetting.
In addition, the method according to the above embodiment of the present invention for preparing iron powder, can also have following additional technology special
Sign：
According to an embodiment of the invention, the average grain diameter of the iron ore particle is 1~5mm, and water content is not higher than
10%.
According to an embodiment of the invention, the reducing gas includes carbon dioxide and carbon monoxide.
According to an embodiment of the invention, in the reducing gas, the volume ratio of carbon dioxide and carbon monoxide be (10~
100)：1.
According to an embodiment of the invention, the temperature of magnetizing roast processing is 600~1000 DEG C, the time is 20~
60min。
According to an embodiment of the invention, the magnetizing roast processing carries out under conditions of anoxybiotic radiant heating.
According to an embodiment of the invention, the Iron concentrate, the reducing agent, the lime stone, the additive and described
Binder in mass ratio 100：(18~35)：(20~30)：(0~3)：3 carry out the mixed processing.
According to another aspect of the present invention, iron is prepared the present invention provides a kind of implementation method above-mentioned for preparing iron powder
The system of powder.According to an embodiment of the invention, which includes：Crusher, the crusher have phosphorus-containing iron ore entrance and
Iron ore particle exports；Magnetizing roasting device, the magnetizing roasting device have also Primordial Qi entrance, iron ore particle entrance and magnetic
Material outlet after change, the iron ore particle entrance are connected with iron ore particle outlet；First order mill ore magnetic selection device, institute
State first order mill ore magnetic selection device have magnetization after material inlet and fine iron breeze outlet, after the magnetization material inlet with it is described
Material outlet is connected after magnetization；There is fine iron breeze entrance, reducing agent entrance, lime stone to enter for mixing arrangement, the mixing arrangement
Material outlet after mouth, additive entrance, binder entrance and mixing, the fine iron breeze entrance export phase with the fine iron breeze
Even；Palletizing device, the palletizing device have mixing after material inlet and mixing pelletizing outlet, after the mixing material inlet with
Material outlet is connected after the mixing；Reducing and smelting device, the reducing and smelting device have mixing pelletizing entrance and metallization
Pelletizing exports, and the mixing pelletizing entrance is connected with mixing pelletizing outlet；And second level mill ore magnetic selection device, described
There is two level ore grinding concentration equipment metallized pellet entrance and iron powder to export, the metallized pellet entrance and the metallization ball
Group outlet is connected.
The system according to the ... of the embodiment of the present invention for preparing iron powder, the system are carried out by magnetizing roasting device at magnetizing roast
Material after reason is magnetized, then mill ore magnetic selection obtain fine iron breeze, also, magnetizing to remove the phosphorus in phosphorus-containing iron ore
During calcination process, using gaseous reducing agent, without matching coal quality reducing agent, to reduce the introducing of impurity in iron ore.As a result,
The system uses twin-stage " roasting-magnetic separation " flow processing phosphorus-containing iron ore, the first order " roasting-magnetic separation " flow to obtain low phosphor iron
Concentrate powder, the second level low-phosphorous fine iron breeze of " roasting-magnetic separation " flow processing obtain iron powder, realize dephosphorization twice, can effectively remove
Phosphorus in iron ore obtains the metal iron powder of the high and low phosphorus of Iron grade, can be used as high-quality steel-making coolant after briquetting.
According to an embodiment of the invention, the magnetizing roasting device is magnetization roasting furnace.
According to an embodiment of the invention, the magnetizing roasting device is totally-enclosed magnetizing roasting device.
According to an embodiment of the invention, the magnetizing roasting device has upper and lower radiant tube.According to an embodiment of the invention,
The also Primordial Qi entrance of the magnetizing roasting device is connected with carbon dioxide air source and carbon monoxide air source.
The additional aspect and advantage of the present invention will be set forth in part in the description, and will partly become from the following description
Obviously, or practice through the invention is recognized.
Description of the drawings
The above-mentioned and/or additional aspect and advantage of the present invention will become in the description from combination following accompanying drawings to embodiment
Obviously and it is readily appreciated that, wherein：
Fig. 1 shows the flow diagram of the method according to an embodiment of the invention for preparing iron powder；
Fig. 2 shows the structural schematic diagram of the system according to an embodiment of the invention for preparing iron powder；
Fig. 3 shows the structural schematic diagram of the cross section of magnetizing roasting device according to an embodiment of the invention；
Fig. 4 shows the partial structural diagram of magnetizing roasting device according to an embodiment of the invention.
Specific implementation mode
The embodiment of the present invention is described below in detail, examples of the embodiments are shown in the accompanying drawings, wherein from beginning to end
Same or similar label indicates same or similar element or element with the same or similar functions.Below with reference to attached
The embodiment of figure description is exemplary, and is only used for explaining the present invention, and is not considered as limiting the invention.
The method for preparing iron powder
According to an aspect of the present invention, the present invention provides a kind of methods preparing iron powder.With reference to figure 1, according to this hair
Bright embodiment, this method include：
S100 break process
According to an embodiment of the invention, phosphorus-containing iron ore is subjected to break process, obtains iron ore particle.Pass through broken place
Reason obtains the iron ore particle of small particle, increases the contact area of iron ore and also Primordial Qi, is conducive to fully restore.
According to an embodiment of the invention, the grain size of iron ore particle is not particularly limited, as long as can be contacted with also Primordial Qi
Ensure that iron oxide is fully reduced to ferroso-ferric oxide.According to some embodiments of the present invention, the average grain of iron ore particle
Diameter is 1~5mm, and water content is not higher than 10%.The grain size of iron ore particle is smaller, bigger with the contact area of also Primordial Qi, has
It is abundant conducive to reduction, but granularity it is meticulous be easy to be reduced air-flow take away, inventor has found that the average grain diameter when iron ore particle is 1
When~5mm, that is, ensure that iron ore particle is reduced fully in finite time, meanwhile, it is not easy to be reduced air-flow and take away, cause original
Material loss.
S200 magnetizing roasts are handled
According to an embodiment of the invention, magnetizing roast processing is carried out to the iron ore particle using also Primordial Qi, obtains magnetic
Material after change.As a result, by magnetizing roast, the iron oxide in iron ore is made to be reduced to ferroso-ferric oxide, convenient for passing through magnetic separation
Dephosphorization.
According to an embodiment of the invention, reducing gas includes carbon dioxide and carbon monoxide.Inventor passes through heating power as a result,
It learns to calculate and find, using CO and CO2Gaseous mixture controls the ratio between them and ensures certain oxygen as reducing gas
Partial pressure, the iron oxide that iron ore may be implemented are reduced to ferroso-ferric oxide.According to an embodiment of the invention, in reducing gas, two
The volume ratio of carbonoxide and carbon monoxide is (10~100)：1.It is likely to cause with ferromagnetic Fe if the ratio is too small3O4
Also it is further floating scholar's body, not easily passs through magnetic separation recovery, and ratio crosses conference and rate of reduction is caused to slow down, effect is deteriorated.When two
The volume ratio of carbonoxide and carbon monoxide is (10~100)：When 1, the reproducibility of reducing gas is appropriate, makes iron oxide that can only restore
For with ferromagnetic ferroso-ferric oxide, specific reaction equation is as follows：
Fe2O3+ CO=Fe3O4+CO2
According to an embodiment of the invention, the temperature of magnetizing roast processing is 600~1000 DEG C, and the time is 20~60min.By
This ensures that iron ore can only be reduced to have ferromagnetic ferroso-ferric oxide, also, phosphorus ore containing under the temperature condition
It is not reduced in elemental phosphorous entrance Copper component, to effectively realize phosphorus and the iron separation of phosphorus-containing iron ore.If temperature mistake
Iron oxide in low iron ore is not easy reduced gas reduction or reduction rate is very slow, if the phosphorus in the excessively high mineral of temperature holds
It is easily reduced and then enters in iron phase, dephosphorization effect cannot be played.
According to an embodiment of the invention, magnetizing roast processing carries out under conditions of anoxybiotic radiant heating.Make as a result,
Magnetizing roast processing carries out in the reducing atmosphere of ingredient stability, ensures that iron oxide can only be reduced to have ferromagnetic four oxidation
Three-iron.
Further, according to a particular embodiment of the invention, magnetization roasting furnace used by handling above-mentioned magnetizing roast
It illustrates, the cross-sectional view of magnetization roasting furnace is as shown in figure 3, magnetizing roast furnace radiating pipe heating schematic diagram such as Fig. 4 institutes
Show, furnace body carries out totally-enclosed, using upper and lower radiant tube mode of heating, it can be achieved that anoxybiotic heats, it is ensured that furnace atmosphere.Above and below material
Heated, temperature is more uniform, and reaction can carry out thoroughly.It roasts furnace bed driven by hydraulic system to rotate, CO2/ CO gaseous mixtures
It is passed through from discharge end so that airflow direction is opposite with siege direction of rotation.In addition, roasting system can continuous discharge and charging,
Treating capacity is big, and production efficiency is high.According to some embodiments of the present invention, iron ore particle is equably distributed into magnetization roasting furnace
Above siege, layer thickness 0-60mm, material is rotated with siege.
The processing of S300 first order mill ore magnetic selections
According to an embodiment of the invention, material after magnetization is subjected to water quenching cooling, then at through first order mill ore magnetic selection
Reason, obtains fine iron breeze.It utilizes first order mill ore magnetic selection to handle as a result, realizes ferrophosphorus separation, screened from material after magnetization
To fine iron breeze, to be effectively removed phosphorus, obtain the low fine iron breeze of phosphorus content.
S400 mixed processings
According to an embodiment of the invention, fine iron breeze is carried out mixing place with reducing agent, lime stone, additive and binder
Reason, material after being mixed.Utilize reducing agent, lime stone, additive to be uniformly mixed with fine iron breeze as a result, fine iron breeze and
Reducing agent, lime stone and additive come into full contact with, and make in reducing and smelting processing procedure, and fine iron breeze is reduced sufficiently, and is bonded
Agent promotes above-mentioned material to be bonded together, and is handled convenient for subsequent pelletizing.
According to an embodiment of the invention, the Iron concentrate, the reducing agent, the lime stone, the additive and described
Binder in mass ratio 100：(18~35)：(20~30)：(0~3)：3 carry out the mixed processing.As a result, reducing agent with it is mixed
The molar ratio of carbon and oxygen in ferriferous oxide is (1.1-1.5) in material after conjunction：1, to which, reducing agent and reduction additive and iron are smart
Miberal powder reacts completely, avoids material from excessively causing to waste, also, the ratio of binder is appropriate, is easy to reunite between material one
It rises, and then mixed material is made to be easy to agglomerating.
According to some embodiments of the present invention, reducing agent is selected from least one of semi-coke, anthracite and bituminous coal.By
This, the reduction effect of reducing agent is good, also, reducing agent is cheap, reduces production cost.
According to some embodiments of the present invention, additive is sodium carbonate or borax.Reducing agent reduced iron is effectively facilitated as a result,
Oxide.
According to some embodiments of the present invention, the binder is selected from least one of bentonite, molasses and starch.
Bond effect is good as a result, is conducive to pelletizing processing.
The processing of S500 pelletizings
According to an embodiment of the invention, material after mixing is subjected to pelletizing processing, obtains mixing pelletizing.As a result, by making
Ball processing, obtains grain size mixing pelletizing appropriate, is handled convenient for subsequent reducing and smelting.
According to some embodiments of the present invention, material and water in mass ratio 100 after mixing：(8-11) mixing carries out at pelletizing
Reason.
The processing of S600 reducing and smeltings
According to an embodiment of the invention, mixing pelletizing is subjected to reducing and smelting processing, obtains metallized pellet.Lead to as a result,
Reducing and smelting processing is crossed, fine iron breeze is made to be reduced to fe.
According to an embodiment of the invention, the temperature of reducing and smelting is 1000~1200 DEG C, and the time is 40~60min.As a result,
The temperature of reducing and smelting processing is no more than 1200 DEG C, and the apatite in iron ore, which will not be reduced, obtains phosphorus simple substance, and then ensures
Phosphorus does not enter in iron phase.
The mill ore magnetic selection processing of the second level S700
According to an embodiment of the invention, metallized pellet is subjected to second level mill ore magnetic selection processing, obtains iron powder, wherein
The phosphorus grade of iron powder is not higher than 0.05%.According to some embodiments of the present invention, which is pressed into block and can be used as good steel-making
Coolant.It is handled as a result, by second level mill ore magnetic selection and carries out slag sluicing system, and further go dephosphorization, obtain low-phosphorous iron powder.Its
In, it should be noted that the simple substance Iron activiation that second level mill ore magnetic selection is handled is not particularly limited, can be according to tool
The production needs and device of body are selected, and can be iron powder, iron block or molten iron etc..
The system for preparing iron powder
According to another aspect of the present invention, iron is prepared the present invention provides a kind of implementation method above-mentioned for preparing iron powder
The system of powder.With reference to figure 2, according to an embodiment of the invention, which is explained, the system packet
It includes：Crusher 100, first order mill ore magnetic selection device 300, mixing arrangement 400, palletizing device 500, is gone back magnetizing roasting device 200
Former smelting device 600 and second level mill ore magnetic selection device 700.
According to an embodiment of the invention, there is crusher 100 phosphorus-containing iron ore entrance and iron ore particle to export.By broken
Broken machine carries out break process, obtains the iron ore particle of small particle, increases the contact area of iron ore and also Primordial Qi, is conducive to fill
Divide reduction.
According to an embodiment of the invention, the grain size of iron ore particle is not particularly limited, as long as can be contacted with also Primordial Qi
Ensure that iron oxide is fully reduced to ferroso-ferric oxide.According to some embodiments of the present invention, the average grain of iron ore particle
Diameter is 1~5mm, and water content is not higher than 10%.The grain size of iron ore particle is smaller, bigger with the contact area of also Primordial Qi, has
It is abundant conducive to reduction, but granularity it is meticulous be easy to be reduced air-flow take away, inventor has found that the average grain diameter when iron ore particle is 1
When~5mm, that is, ensure that iron ore particle is reduced fully in finite time, meanwhile, it is not easy to be reduced air-flow and take away, cause original
Material loss.
According to an embodiment of the invention, magnetizing roasting device 200 has also Primordial Qi entrance, iron ore particle entrance and magnetization
Material outlet afterwards, wherein iron ore particle entrance is connected with iron ore particle outlet, using also Primordial Qi to the iron ore particle
Carry out magnetizing roast processing, material after being magnetized, to by magnetizing roast, the iron oxide in iron ore be made to be reduced to four
Fe 3 O goes dephosphorization convenient for passing through magnetic separation.
According to an embodiment of the invention, magnetizing roasting device 200 is magnetization roasting furnace.Specifically, according to the present invention one
The structural schematic diagram of a little embodiments, magnetizing roasting device 200 is as shown in Figures 3 and 4, wherein Fig. 3 is the transversal of magnetizing roasting device
Face schematic diagram, Fig. 4 are the structural schematic diagrams of upper and lower radiant tube, and upper and lower radiant tube is arranged in the both sides up and down of the bed of material, in addition, magnetic
It can be that totally-enclosed is heated to change calciner, heated using upper and lower radiant tube, it can be achieved that anoxybiotic heats, it is ensured that furnace atmosphere
Ingredient stability ensures that iron ore can only be reduced to have ferromagnetic ferroso-ferric oxide.Also, material is heated up and down, temperature
More uniformly, reaction is more thorough.Meanwhile furnace bed driven by hydraulic system of roasting rotates, CO2/ CO gaseous mixtures are logical from discharge end
Enter so that airflow direction is opposite with siege direction of rotation.Roasting system can continuous discharge and charging, treating capacity is big, production effect
Rate is high.
According to an embodiment of the invention, the also Primordial Qi entrance of magnetizing roasting device 200 and carbon dioxide air source and an oxidation
Carbon air source is connected.Inventor is had found by calculation of thermodynamics, using CO and CO2Gaseous mixture is controlled simultaneously as reducing gas
Ratio between them ensures certain partial pressure of oxygen, and the iron oxide that iron ore may be implemented is reduced to ferroso-ferric oxide.
According to an embodiment of the invention, in reducing gas, the volume ratio of carbon dioxide and carbon monoxide is (10~100)：
1.It is likely to cause with ferromagnetic Fe if the ratio is too small3O4Also it is further floating scholar's body, not easily passs through magnetic separation recovery, and
Ratio crosses conference and rate of reduction is caused to slow down, and effect is deteriorated.When the volume ratio of carbon dioxide and carbon monoxide is (10~100)：1
When, the reproducibility of reducing gas is appropriate, makes iron oxide that can only be reduced to have ferromagnetic ferroso-ferric oxide, specific reaction equation is such as
Under：
Fe2O3+ CO=Fe3O4+CO2
According to an embodiment of the invention, the temperature that magnetizing roasting device 200 carries out magnetizing roast processing is 600~1000
DEG C, the time is 20~60min.As a result, under the temperature condition, ensure that iron ore can only be reduced to have ferromagnetic four oxygen
Change three-iron.If the iron oxide in the too low iron ore of temperature is not easy reduced gas reduction or reduction rate is very slow, if warm
The phosphorus spent in high mineral is easy to be reduced and then enter in iron phase, cannot play dephosphorization effect.Implementation according to the present invention
Example, magnetizing roasting device 200 carry out magnetizing roast processing and are carried out under conditions of anoxybiotic radiant heating.Make magnetization as a result,
Calcination process carries out in the reducing atmosphere of ingredient stability, ensures that iron oxide can only be reduced to have ferromagnetic four oxidation three
Iron.
According to an embodiment of the invention, first order mill ore magnetic selection device 300 has material inlet and fine iron breeze after magnetization
Outlet, wherein material inlet is connected with material outlet after magnetization after magnetization, and material after magnetization is carried out water quenching cooling, is then existed
It is handled through first order mill ore magnetic selection, obtains fine iron breeze.First order mill ore magnetic selection device is utilized as a result, realizes ferrophosphorus separation, from
Screening obtains fine iron breeze in material after magnetization, to be effectively removed phosphorus.
According to an embodiment of the invention, mixing arrangement 400 have fine iron breeze entrance, reducing agent entrance, lime stone entrance,
Material outlet after additive entrance, binder entrance and mixing, wherein fine iron breeze entrance is connected with fine iron breeze outlet, will
Fine iron breeze carries out mixed processing, material after being mixed with reducing agent, lime stone, additive and binder.As a result, using also
Former agent, lime stone, additive are uniformly mixed with fine iron breeze, and fine iron breeze fully connects with reducing agent, lime stone and additive
It touches, makes in reducing and smelting processing procedure, fine iron breeze is reduced sufficiently, and binder promotes above-mentioned material to be bonded together, just
In the processing of subsequent pelletizing.
According to an embodiment of the invention, palletizing device 500 has material inlet and the outlet of mixing pelletizing after mixing, wherein
Material inlet is connected with material outlet after mixing after mixing, and material after mixing is carried out pelletizing processing, obtains mixing pelletizing.By
This, is handled by pelletizing, obtains grain size mixing pelletizing appropriate, is handled convenient for subsequent reducing and smelting.
According to an embodiment of the invention, reducing and smelting device 600 has mixing pelletizing entrance and metallized pellet outlet,
In, mixing pelletizing entrance is connected with the outlet of mixing pelletizing, and mixing pelletizing is carried out reducing and smelting processing, obtains metallized pellet.
It is handled as a result, by reducing and smelting, fine iron breeze is made to be reduced to fe.
According to an embodiment of the invention, the temperature of reducing and smelting is 1000~1200 DEG C, and the time is 40~60min.As a result,
Reduction temperature is low, and reduction effect is good.
According to an embodiment of the invention, there is second level mill ore magnetic selection device 700 metallized pellet entrance and iron powder to export,
Wherein, metallized pellet entrance is connected with metallized pellet outlet, and metallized pellet is carried out second level mill ore magnetic selection processing, is obtained
To iron powder, wherein the phosphorus grade of iron powder is not higher than 0.05%.It is handled as a result, by second level mill ore magnetic selection and carries out slag sluicing system,
And dephosphorization is further gone, obtain low-phosphorous iron powder.Wherein, it should be noted that the fe that second level mill ore magnetic selection is handled
Form be not particularly limited, can be needed according to specific production and device be selected, can be iron powder, iron block or molten
Melt iron etc..
Below with reference to specific embodiment, the present invention will be described, it should be noted that these embodiments are only explanation
Property, and be not considered as limiting the invention.
Embodiment 1
Iron powder is prepared using high-phosphorus iron ore, wherein the ingredient of high-phosphorus iron ore is that TFe is that 46.03%, FeO is
2.91%, P 0.92%, water content 8%, the specific method is as follows：
(1) it is 3mm iron ore to be crushed to average grain diameter, is equably distributed into magnetization roasting furnace, layer thickness 60mm,
It is passed through CO2/ CO volume ratios are 10:1 mixture control atmosphere, calcination temperature control are 750 DEG C, roast 35min.
(2) ore grinding after material water cooling after the roasting for obtaining step (1), carries out magnetic separation, magnetic separation obtains under 1500Oe field strength
Obtain fine iron breeze.
(3) according to 100 parts of fine iron breeze, 25 parts of reducing agent, 20 parts of lime stone, 3 parts of sodium carbonate, 3 parts of bentonite mixed
It closes, material adds water pelletizing after mixing.
(4) it is uniformly distributed into rotary hearth furnace after pelletizing drying, 50min is restored at 1000 DEG C~1200 DEG C.Reduzate discharges
Directly cooling afterwards, after ore grinding, the magnetic separation under the field strength of 1200Oe, acquisition Iron grade is 92.26%, P grades are 0.047% metal
Iron powder.
Embodiment 2
Iron powder is prepared using high-phosphorus iron ore, wherein the ingredient of high-phosphorus iron ore is that TFe is that 46.03%, FeO is
2.91%, P 0.92%, water content 8%, the specific method is as follows：
(1) it is 3mm iron ore to be crushed to average grain diameter, is equably distributed into magnetization roasting furnace, layer thickness 50mm,
It is passed through CO2/ CO volume ratios are 20:1 mixture control atmosphere, calcination temperature control are 750 DEG C, roast 35min.
(2) ore grinding after material water cooling after the roasting for obtaining step (1), carries out magnetic separation, magnetic separation obtains under 1200Oe field strength
Obtain fine iron breeze.
(3) according to 100 parts of fine iron breeze, 23 parts of reducing agent, 25 parts of lime stone, 3 parts of sodium carbonate, 3 parts of bentonite mixed
It closes, material adds water pelletizing after mixing.
(4) it is uniformly distributed into rotary hearth furnace after pelletizing drying, 40min is restored at 1000 DEG C~1200 DEG C.Reduzate discharges
Directly cooling afterwards, the magnetic separation under the field strength of 1000Oe after ore grinding, acquisition Iron grade is 93.11%, P grades are 0.035% metal
Iron powder.
Embodiment 3
Iron powder is prepared using high-phosphorus iron ore, wherein the ingredient of high-phosphorus iron ore is that TFe is that 51.01%, FeO is
1.86%, P 0.71%, water content 4%, the specific method is as follows：
(1) it is 3mm iron ore to be crushed to average grain diameter, is equably distributed into magnetization roasting furnace, layer thickness 50mm,
It is passed through CO2/ CO volume ratios are 50:1 mixture control atmosphere, calcination temperature control are 800 DEG C, roast 30min.
(2) ore grinding after material water cooling after the roasting for obtaining step (1), carries out magnetic separation, magnetic separation obtains under 1500Oe field strength
Obtain fine iron breeze.
(3) according to 100 parts of fine iron breeze, 25 parts of reducing agent, 30 parts of lime stone, 3 parts of sodium carbonate, 3 parts of bentonite mixed
It closes, material adds water pelletizing after mixing.
(4) it is uniformly distributed into rotary hearth furnace after pelletizing drying, 42min is restored at 1000 DEG C~1200 DEG C.Reduzate discharges
Directly cooling afterwards, the magnetic separation under the field strength of 1200Oe after ore grinding, acquisition Iron grade is 93.46%, P grades are 0.028% metal
Iron powder.
In the description of this specification, reference term " one embodiment ", " some embodiments ", " example ", " specifically show
The description of example " or " some examples " etc. means specific features, structure, material or spy described in conjunction with this embodiment or example
Point is included at least one embodiment or example of the invention.In the present specification, schematic expression of the above terms are not
Centainly refer to identical embodiment or example.Moreover, particular features, structures, materials, or characteristics described can be any
One or more embodiments or example in can be combined in any suitable manner.
Although an embodiment of the present invention has been shown and described, it will be understood by those skilled in the art that：Not
In the case of being detached from the principle of the present invention and objective a variety of change, modification, replacement and modification can be carried out to these embodiments, this
The range of invention is limited by claim and its equivalent.
Claims (8)
1. a kind of method preparing iron powder, which is characterized in that including：
Phosphorus-containing iron ore is subjected to break process, to obtain iron ore particle；
Magnetizing roast processing is carried out to the iron ore particle using also Primordial Qi, so as to material after magnetize, wherein it is described and also
Primordial Qi includes carbon dioxide and carbon monoxide, and the volume ratio of carbon dioxide and carbon monoxide is (10~100)：1；
Material after the magnetization is subjected to water quenching cooling, is handled through first order mill ore magnetic selection, to obtain fine iron breeze；
The fine iron breeze and reducing agent, lime stone, additive and binder are subjected to mixed processing, so as to object after being mixed
Material, wherein the additive is sodium carbonate or borax；
Material after the mixing is subjected to pelletizing processing, to obtain mixing pelletizing；
The mixing pelletizing is subjected to reducing and smelting processing, to obtain metallized pellet；And
The metallized pellet is subjected to second level mill ore magnetic selection processing, to obtain iron powder, wherein the phosphorus grade of the iron powder
Not higher than 0.05%,
The average grain diameter of the iron ore particle is 1~5mm,
The magnetizing roast processing carries out under conditions of anoxybiotic radiant heating, wherein the stone of the iron ore particle is thick
Degree is 0~60mm, and the temperature of the magnetizing roast processing is 600~1000 DEG C, and the time is 20~60min,
The temperature of the reducing and smelting processing is 1000~1200 DEG C.
2. according to the method described in claim 1, it is characterized in that, the water content of the iron ore particle is not higher than 10%.
3. according to the method described in claim 1, it is characterized in that, the Iron concentrate, the reducing agent, the lime stone, institute
State additive and the binder in mass ratio 100：(18~35)：(20~30)：(0~3)：3 carry out the mixed processing.
4. a kind of system for preparing iron powder implemented claim 1-3 any one of them and prepare the method for iron powder, feature exist
In, including：
There is phosphorus-containing iron ore entrance and iron ore particle to export for crusher, the crusher；
Magnetizing roasting device, material goes out after the magnetizing roasting device has also Primordial Qi entrance, iron ore particle entrance and magnetization
Mouthful, the iron ore particle entrance is connected with iron ore particle outlet；
First order mill ore magnetic selection device, the first order mill ore magnetic selection device go out with material inlet after magnetization and fine iron breeze
Mouthful, material inlet is connected with material outlet after the magnetization after the magnetization；
Mixing arrangement, the mixing arrangement have fine iron breeze entrance, reducing agent entrance, lime stone entrance, additive entrance, glue
Material outlet after tying agent entrance and mixing, the fine iron breeze entrance are connected with fine iron breeze outlet；
Palletizing device, the palletizing device have material inlet and the outlet of mixing pelletizing after mixing, material inlet after the mixing
It is connected with material outlet after the mixing；
Reducing and smelting device, the reducing and smelting device have mixing pelletizing entrance and metallized pellet outlet, the mixing ball
Group's entrance is connected with mixing pelletizing outlet；And
There is metallized pellet entrance and iron powder to export for second level mill ore magnetic selection device, the second level mill ore magnetic selection device, institute
Metallized pellet entrance is stated with metallized pellet outlet to be connected.
5. system according to claim 4, which is characterized in that the magnetizing roasting device is magnetization roasting furnace.
6. system according to claim 5, which is characterized in that the magnetizing roasting device fills for totally-enclosed magnetizing roast
It sets.
7. system according to claim 5, which is characterized in that the magnetizing roasting device has upper and lower radiant tube.
8. system according to claim 4, which is characterized in that also Primordial Qi entrance and the titanium dioxide of the magnetizing roasting device
Carbon air source is connected with carbon monoxide air source.
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN107083479A (en) * | 2017-05-25 | 2017-08-22 | 江苏省冶金设计院有限公司 | The processing system and processing method of a kind of ferrous manganese ore |
| CN107186216B (en) * | 2017-06-02 | 2019-07-23 | 新冶高科技集团有限公司 | A kind of method that low cost low temperature direct-reduction prepares superfine iron powder |
| CN107164630A (en) * | 2017-06-15 | 2017-09-15 | 江苏省冶金设计院有限公司 | The system and method for handling troilite concentrate |
| CN107151737A (en) * | 2017-07-05 | 2017-09-12 | 江苏省冶金设计院有限公司 | It is a kind of to handle the system and method that hematite-type difficulty selects iron material |
| CN110184405A (en) * | 2019-06-04 | 2019-08-30 | 甘肃酒钢集团宏兴钢铁股份有限公司 | A kind of method and device thereof using acid carbonaceous metallized pellet production molten iron |
| CN114026041A (en) * | 2019-06-25 | 2022-02-08 | 杰富意钢铁株式会社 | Method for removing phosphorus from phosphorus-containing substance, method for producing raw material for metal smelting or metal refining, and method for producing metal |
| CN111763821B (en) * | 2020-07-23 | 2023-10-24 | 宝武集团环境资源科技有限公司 | Electroplating sludge treatment method and device |
| CN111872412B (en) * | 2020-07-30 | 2022-11-11 | 钢研晟华科技股份有限公司 | Preparation method of metal iron powder for powder metallurgy |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101487068A (en) * | 2009-03-03 | 2009-07-22 | 北京科技大学 | Technological process for directly producing spongy iron from high-phosphor oolitic hematite |
| CN103643030A (en) * | 2013-11-20 | 2014-03-19 | 长沙矿冶研究院有限责任公司 | Mineral processing process for preparing qualified iron concentrate by adopting oolitic iron mine as raw material |
| CN104313229A (en) * | 2014-10-30 | 2015-01-28 | 武汉钢铁(集团)公司 | Method for manufacturing high-phosphorus iron by using shaft furnace to directly reduce high phosphorus ore |
| CN104451132A (en) * | 2014-11-25 | 2015-03-25 | 北京神雾环境能源科技集团股份有限公司 | Method for reducing phosphorus-containing iron ore |
| CN104451124A (en) * | 2014-11-17 | 2015-03-25 | 长沙有色冶金设计研究院有限公司 | Method for iron increase and dephosphorization of low-grade high-phosphorus oolitic hematite |
Family Cites Families (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101338361A (en) * | 2008-08-11 | 2009-01-07 | 昆明晶石矿冶有限公司 | Method for reducing phosphorus in high phosphorus haematite or hematite and limonite ore by magnetization roasting-leaching method |
| CN101818249B (en) * | 2010-04-27 | 2012-07-18 | 武汉理工大学 | Method for improving iron and reducing phosphorus of high phosphorus oolitic iron ore by magnetic roasting and two-step bioleaching |
| CN102974456B (en) * | 2012-12-11 | 2015-10-21 | 中国地质科学院矿产综合利用研究所 | Separation process of refractory iron ore |
-
2016
- 2016-06-03 CN CN201610395358.8A patent/CN105907947B/en active Active
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101487068A (en) * | 2009-03-03 | 2009-07-22 | 北京科技大学 | Technological process for directly producing spongy iron from high-phosphor oolitic hematite |
| CN103643030A (en) * | 2013-11-20 | 2014-03-19 | 长沙矿冶研究院有限责任公司 | Mineral processing process for preparing qualified iron concentrate by adopting oolitic iron mine as raw material |
| CN104313229A (en) * | 2014-10-30 | 2015-01-28 | 武汉钢铁(集团)公司 | Method for manufacturing high-phosphorus iron by using shaft furnace to directly reduce high phosphorus ore |
| CN104451124A (en) * | 2014-11-17 | 2015-03-25 | 长沙有色冶金设计研究院有限公司 | Method for iron increase and dephosphorization of low-grade high-phosphorus oolitic hematite |
| CN104451132A (en) * | 2014-11-25 | 2015-03-25 | 北京神雾环境能源科技集团股份有限公司 | Method for reducing phosphorus-containing iron ore |
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