CN105420491A - Iron ore sintering method - Google Patents
Iron ore sintering method Download PDFInfo
- Publication number
- CN105420491A CN105420491A CN201510852088.4A CN201510852088A CN105420491A CN 105420491 A CN105420491 A CN 105420491A CN 201510852088 A CN201510852088 A CN 201510852088A CN 105420491 A CN105420491 A CN 105420491A
- Authority
- CN
- China
- Prior art keywords
- sintering
- iron ore
- ore
- particle diameter
- sintering method
- 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.)
- Pending
Links
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
- C22B1/24—Binding; Briquetting ; Granulating
- C22B1/2406—Binding; Briquetting ; Granulating pelletizing
Landscapes
- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Manufacturing & Machinery (AREA)
- Geochemistry & Mineralogy (AREA)
- Geology (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Life Sciences & Earth Sciences (AREA)
- Environmental & Geological Engineering (AREA)
- Materials Engineering (AREA)
- Mechanical Engineering (AREA)
- Metallurgy (AREA)
- Organic Chemistry (AREA)
- Manufacture And Refinement Of Metals (AREA)
Abstract
The invention belongs to the technical field of iron ore smelting, and particularly relates to an iron ore sintering method. The iron ore sintering method comprises the following steps that a, rich ore fines, limestone and return fines are screened, and the portions with the grain size larger than 3 mm and the portions with the grain size smaller than 3 mm are screened out; b, the portions with the grain size smaller than 3 mm obtained in the step a are evenly mixed with concentrate fines, quick lime, fuel and auxiliary materials to be granulated to obtain a base material; and c, the portions with the grain size larger than 3 mm obtained in the step a are evenly mixed with the base material obtained in the step b for sintering. According to the method, reasonable separated granulation and sintering are performed on ore, so that the sintering yield is improved, and energy consumption is lowered.
Description
Technical field
The invention belongs to iron ore technical field of smelting, be specifically related to a kind of sintering method of iron ore.
Background technology
The existing iron ore for sintering can be divided into two classes by size classification: a class is concentrate level, from the product iron concentrate that the iron ore (raw ore) of nature exploitation is removed a large amount of impurity raising ferrous grade through fragmentation, ore grinding, ore dressing and obtained, granularity is generally less than 0.074mm (200 order) and accounts for 50 ~ 90%; Another kind of is the product rich ore powder directly exploited from nature or obtain through simple crushing, the general >35% of ferrous grade, granularity > 1mm part accounts for more than 50%, < 1mm grade part and accounts for 10 ~ 30%.
Agglutinating test and practice show: the general conduct of ore grain size < 0.2mm adheres to powder, and granularity 0.7 ~ 3mm ore, generally as grain core, adheres to powder and adheres on a core in pelletization, makes the bead that can be used for sintering.Fine ore can not be directly used in sintering, must carry out pelletizing and could be used for sintering to more than > 3mm, improve sintering efficiency, and rich ore powder can be directly used in sintering without granulation with facility for granulating (mixing machine, pelletizer).The ore of 0.2 ~ 0.7mm grade both can be used as adhesion powder, can be used as again a core, when adhering on a core as during adhesion powder, but can come off very soon in transhipment with sintering process, very slow as then the granulate speed of growth of bead of grain core.After have again investigator to show, the breeze of 0.0 ~ 1.05mm is zone of transition powder, not only can be adhesion powder but also a core can be done, zone of transition powder should be reduced in practical application as far as possible, then > 1mm breeze then exists as grain core, and < 0.2mm breeze then exists as adhering to powder.Obviously, concentrate can only as adhesion powder, rich ore, return mine, the grade of > 1mm then becomes granulation core in Wingdale, but the part of < 0.2mm then becomes adhesion powder.
Due to shortage and the change of resource, modern sintering general employing fine ore and rich ore powder are arranged in pairs or groups by a certain percentage and are used, sinter mixture granularity general requirement < 8mm, also the requirement < 6mm had, be not to be the bigger the better or the smaller the better, granularity larger then mineralising speed of response is slower, the less then materialbeds comminution of granularity is larger, ventilation property is poorer, and the rate of return mine is high, and productive rate is low.Sinter mixture is generally best at 3 ~ 5mm.Sintering pelletizing mechanism shows, coarse fraction ore in compound is to just producing destruction in the little club of the granulation of pelletizing, affect the normal coarsening rate of bead, because oarse-grained pellet performance is very poor in balling process, friction, extruding and collision are caused to the pellet of growing up, thus affect the size composition of compound, and then affect the main economic and technical indices such as Sintering Yield and energy consumption.
Summary of the invention
For existing iron ore sintering Problems existing, goal of the invention of the present invention is the sintering method providing a kind of iron ore.The method can improve iron ore concentrate sintering productive rate, reduces energy consumption, reduce smelting cost.
Technical problem to be solved by this invention is to provide a kind of sintering method of iron ore.The method comprises the following steps:
A, by rich ore powder, Wingdale, return mine and sieve, sieve out the part of particle diameter > 3mm and the part of particle diameter < 3mm;
B, the part of particle diameter < 3mm and fine ore, unslaked lime, fuel, the auxiliary material that are sieved out by step a granulate after mixing to obtain matrix material;
Obtain comprehensive material after c, the part of particle diameter > 3mm and the matrix material of step b that are sieved out by step a mix, comprehensive material is carried out sintering.
Preferably, in the sintering method step b of above-mentioned iron ore, participate in again granulating after described unslaked lime water digestion.
Preferably, in the sintering method step b of above-mentioned iron ore, described fuel is at least one in coke powder or pulverized anthracite.
Preferably, in the sintering method step b of above-mentioned iron ore, described auxiliary material is at least one in gas ash, slag, mud, iron sheet or scum.
Preferably, in the sintering method step b of above-mentioned iron ore, the water content of described granulation gained bead is 6 ~ 8wt%.
The inventive method is granulated after iron ore classification again, reduce the impact of coarse particles on bead when granulating, namely prevent macrobead raw material to the friction of bead, extruding, collision, improve the speed of growth of bead during granulation, thus improve sintering rate, reduce energy consumption simultaneously.Adopt the method can reduce mixing machine load and idle work, the granularity of granulation bead increases, and is conducive to improving sinter mixture granularity composition.
Embodiment
A sintering method for iron ore, comprises the following steps:
A, by rich ore powder, Wingdale, return mine and sieve, sieve out the part of particle diameter > 3mm and the part of particle diameter < 3mm;
Described rich ore powder is: directly to exploit and without ore dressing or through simple crushing and the iron ore of ferrous grade more than 35% from nature;
Described return mine for: through the powder of sieve size < 5mm after sintering;
The part of particle diameter > 3mm is granulated or pelletizing without the need to carrying out, and is directly used in sintering; The conduct that the part of particle diameter < 3mm has adheres to powder, some conduct granulation cores, wherein the part of particle diameter < 0.2mm naturally becomes adhesion powder in pelletization, adheres on the grain core of particle diameter > 1mm; Particle diameter 0.2 ~ 1mm part is then as zone of transition powder, namely can be used as adhesion powder and also can be used as a core, but very weak as adhering to powder adhesive capacity, impacting and extruding, transport and come off very soon in sintering process, as grain core, then the bead speed of growth is slow, is difficult to grow up.
B, the part of particle diameter < 3mm and fine ore, unslaked lime, fuel, the auxiliary material that are sieved out by step a granulate after mixing to obtain matrix material again;
Described fine ore is: removing through fragmentation, ore grinding, ore dressing the product that a large amount of impurity raising ferrous grade obtains from the iron ore (raw ore) of nature exploitation is iron ore concentrate, granularity is less than 0.074mm (200 order) and accounts for 50 ~ 90%, and ferrous grade is higher than raw ore; Described fuel is at least one in coke powder or pulverized anthracite; Described auxiliary material is at least one in gas ash, slag, mud, iron sheet or scum.
The mixing stage can adopt primary mixer, and granulating stage can adopt second drum mixer or pelletizer.Because the part of having sieved out particle diameter > 3mm in step a does not participate in mixed pelletization, thus alleviate coarse particles raw material in pelletization to just in the impact of the bead of development growth, namely prevent coarse particles raw material to the friction of bead, extruding, collision, thus the bead speed of growth is accelerated.
In order to increase cohesiveness, the unslaked lime digestion that needs to add water before mixing obtains calcium hydroxide and carries out follow-up mixed pelletization again, and digestion facility generally adopts specialty to join the device that disappears.
C, the part of particle diameter > 3mm and the matrix material of step b that are sieved out by step a obtain comprehensive material after mixing, and comprehensive material are carried out sintering.
Embodiment
(1) batch operation
Select sintering needed for raw material: rich ore powder, Wingdale, return mine, fine ore, unslaked lime, fuel, auxiliary material; Described rich ore powder is directly to exploit and without the iron ore of ore dressing or through simple crushing and the iron ore of Iron grade more than 35% from nature; Described returning mine is less than the powder of 5mm for sintering rear granularity; Described fine ore is that the iron ore exploited from nature passes through fragmentation, ore grinding, sorts and remove a large amount of impurity, and granularity is less than the breeze that 0.074mm accounts for 50 ~ 90%; Then each raw material is prepared burden;
(2) pre-screen operation
By the rich ore powder of having prepared burden, return mine, Wingdale sieves, obtain sieving out the part of particle diameter > 3mm and the part of particle diameter < 3mm;
(3) quicklime slaking operation
Mixed with water by unslaked lime and carry out digestion reaction and obtain calcium hydroxide, the general equipment of specialty that adopts of digestion joins the device that disappears;
(4) mixing and granulation
The part of particle diameter < 3mm and fine ore, postdigestive unslaked lime, fuel, auxiliary material are carried out mixing rear granulation and obtains matrix material, mixing generally adopts mixing machine, granulate general employing mixing machine or balling disc;
(5) complex operation
The part of particle diameter > 3mm is mixed to obtain comprehensive material with matrix material.Granulation operation is generally established on the ground by modern sintering, comprehensive material needs many belt transports could arrive material ore deposit groove above sinter machine, combined process is exactly directly be added on the transhipment belt of matrix material by the part of particle diameter > 3mm, turn over fortune by belt the two is mixed naturally, reach basic uniform degree.
(6) sintering work
Comprehensive material through steps such as the operation of the cloth such as round roller, multiple roll, igniter fire operation, smoke extractor exhausting, carries out normal sintering work after arriving the material ore deposit groove above sinter machine.
In cloth operation, round roller and the part of multiple roll to matrix material and particle diameter > 3mm mix further, and the comprehensive material arrived on sinter machine is substantially even.
(7) can arrange according to geographical conditions and actual needs as the concrete equipment in pre-screen, complex operation stage and Logistics Process.
The inventive method improves the granulation mechanism of iron ore; the fine particle that the coarse particles not needing to granulate by larger for particle and the less needs of particle are granulated separately; thus limit the former destruction to the latter in pelletization; improve the normal growth rate of granulation bead; increase the granularity of comprehensive material finished product bead; comprehensive material granularity is better than ordinary sinter material granularity, can accelerate sintering velocity, has obvious Increasing Production and Energy Saving effect.What particle was larger simultaneously does not need the coarse particles of granulating not participate in granulation operation, alleviates mixing machine load and useless effect, reduces equipment cost.
Claims (5)
1. a sintering method for iron ore, is characterized in that: comprise the following steps:
A, by rich ore powder, Wingdale, return mine and sieve, sieve out the part of particle diameter > 3mm and the part of particle diameter < 3mm;
B, the part of particle diameter < 3mm of being sieved out by step a carry out matrix material of granulating to obtain after mixing with fine ore, unslaked lime, fuel, auxiliary material;
C, the part of particle diameter > 3mm and the matrix material of step b that are sieved out by step a carry out sintering after mixing.
2. the sintering method of iron ore according to claim 1, is characterized in that: in step b, participates in granulating after described unslaked lime water digestion again.
3. the sintering method of iron ore according to claim 1, is characterized in that: in step b, and described fuel is at least one in coke powder or pulverized anthracite.
4. the sintering method of iron ore according to claim 1, is characterized in that: in step b, and described auxiliary material is at least one in gas ash, slag, mud, iron sheet or scum.
5. the sintering method of iron ore according to claim 1, is characterized in that: in step b, and the water content of described granulation gained bead is 6 ~ 8wt%.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510852088.4A CN105420491A (en) | 2015-11-27 | 2015-11-27 | Iron ore sintering method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510852088.4A CN105420491A (en) | 2015-11-27 | 2015-11-27 | Iron ore sintering method |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN105420491A true CN105420491A (en) | 2016-03-23 |
Family
ID=55499024
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201510852088.4A Pending CN105420491A (en) | 2015-11-27 | 2015-11-27 | Iron ore sintering method |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN105420491A (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108425008A (en) * | 2018-06-21 | 2018-08-21 | 攀钢集团攀枝花钢铁研究院有限公司 | A kind of classification cloth sintering method of siderite |
| CN111074067A (en) * | 2020-01-11 | 2020-04-28 | 武钢集团昆明钢铁股份有限公司 | Preparation method of carbonized sludge particles for iron ore powder sintering additive |
| CN113249568A (en) * | 2021-04-15 | 2021-08-13 | 首钢集团有限公司 | Sintering raw material and preparation method thereof |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101805826A (en) * | 2010-05-07 | 2010-08-18 | 攀钢集团钢铁钒钛股份有限公司 | Method for sintering taihe vanadium and titanium magnet concentrates |
| CN102102146A (en) * | 2009-12-22 | 2011-06-22 | 鞍钢股份有限公司 | Method for sintering high-aluminum refractory limonite |
| CN104232883A (en) * | 2013-06-19 | 2014-12-24 | 宝山钢铁股份有限公司 | Mineral material usage method for increasing usage amount and production rate of sintered iron concentrate |
| CN104294035A (en) * | 2014-10-28 | 2015-01-21 | 武汉钢铁(集团)公司 | Method for experimental research on pelletizing performance of iron ore powder |
-
2015
- 2015-11-27 CN CN201510852088.4A patent/CN105420491A/en active Pending
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102102146A (en) * | 2009-12-22 | 2011-06-22 | 鞍钢股份有限公司 | Method for sintering high-aluminum refractory limonite |
| CN101805826A (en) * | 2010-05-07 | 2010-08-18 | 攀钢集团钢铁钒钛股份有限公司 | Method for sintering taihe vanadium and titanium magnet concentrates |
| CN104232883A (en) * | 2013-06-19 | 2014-12-24 | 宝山钢铁股份有限公司 | Mineral material usage method for increasing usage amount and production rate of sintered iron concentrate |
| CN104294035A (en) * | 2014-10-28 | 2015-01-21 | 武汉钢铁(集团)公司 | Method for experimental research on pelletizing performance of iron ore powder |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108425008A (en) * | 2018-06-21 | 2018-08-21 | 攀钢集团攀枝花钢铁研究院有限公司 | A kind of classification cloth sintering method of siderite |
| CN108425008B (en) * | 2018-06-21 | 2019-12-03 | 攀钢集团攀枝花钢铁研究院有限公司 | A kind of classification cloth sintering method of siderite |
| CN111074067A (en) * | 2020-01-11 | 2020-04-28 | 武钢集团昆明钢铁股份有限公司 | Preparation method of carbonized sludge particles for iron ore powder sintering additive |
| CN113249568A (en) * | 2021-04-15 | 2021-08-13 | 首钢集团有限公司 | Sintering raw material and preparation method thereof |
| CN113249568B (en) * | 2021-04-15 | 2022-10-21 | 首钢集团有限公司 | Sintering raw material and preparation method thereof |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN102296177B (en) | Method for reinforcing sintering of iron ores difficult to pelletize by biomass fuel | |
| CN103667675A (en) | Treatment method of laterite-nickel ore | |
| CN101353708B (en) | Nickel iron smelting process with nickel oxide ore and stainless steel production wastes as raw materials | |
| CN101928824B (en) | Sinter production method for reducing sintering solid burnup and enhancing intensity | |
| CN105002352B (en) | A kind of preparation method of high performance pellet binder | |
| CN105039728A (en) | Method for treating copper slag | |
| CN102363218B (en) | Method for producing copper-powder-containing iron by reducing copper-containing furnace cinders directly | |
| CN103537366B (en) | The method of high grade iron is reclaimed from blast furnace dry slag | |
| CN105274325B (en) | A method of realizing super sintering at deep bed | |
| CN103551247B (en) | Iron removal of impurities ore-dressing technique is put forward in a kind of limonite reduction roasting | |
| CN110314763B (en) | Method for preparing pellet raw material by using fine ore | |
| CN105296746A (en) | Method for reducing sintered solid fuel consumption | |
| CN112553462A (en) | Sintered ore containing sintered dedusting ash pellets and preparation method thereof | |
| CN103710536A (en) | Preparation method of pellet binder with high performance | |
| CN103614548B (en) | Method for producing sinter from hematite concentrate powder | |
| CN105420491A (en) | Iron ore sintering method | |
| CN113604660A (en) | Dedusting ash micronized recycling process method | |
| CN105039681B (en) | A kind of manufacture method of alkaline magnesium-rich pellet nodulizing | |
| CN110283992B (en) | High-proportion limonite sintering method | |
| CN103882224A (en) | Coupling type sintering method of low-grade laterite-nickel ores | |
| CN103725875B (en) | High-performance pellet | |
| CN101994002B (en) | Method for sintering ore blending of Jianshan concentrate fines and limonite | |
| CN101892381A (en) | Process for producing pellet by mixing and processing hematite, siderite and vanadium titano-magnetite concentrate | |
| CN103757202A (en) | Sintering method with part of return mine being sintered without pelletization being pelletized | |
| CN113186392B (en) | Pelletizing method for realizing efficient utilization of metallurgical solid waste |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| RJ01 | Rejection of invention patent application after publication | ||
| RJ01 | Rejection of invention patent application after publication |
Application publication date: 20160323 |