CN105331808B - A kind of method of iron mineral powder agglomeration - Google Patents
A kind of method of iron mineral powder agglomeration Download PDFInfo
- Publication number
- CN105331808B CN105331808B CN201510837483.5A CN201510837483A CN105331808B CN 105331808 B CN105331808 B CN 105331808B CN 201510837483 A CN201510837483 A CN 201510837483A CN 105331808 B CN105331808 B CN 105331808B
- Authority
- CN
- China
- Prior art keywords
- iron
- granularity
- iron ore
- iron block
- ore powder
- 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.)
- Active
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
- C22B1/242—Binding; Briquetting ; Granulating with binders
- C22B1/243—Binding; Briquetting ; Granulating with binders inorganic
-
- 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
Landscapes
- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (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)
- Inorganic Chemistry (AREA)
- Manufacture And Refinement Of Metals (AREA)
Abstract
The invention discloses a kind of method of iron mineral powder agglomeration, it is intended to improves iron ore Iron grade, reduces energy expenditure, reduces environmental pollution.The step of this method, includes：Iron ore powder agglomates dispensing：Iron Ore Powder, agstone, magnesium water, pore creating material；Mixed once：The less Iron Ore Powder of granularity, agstone, magnesium cement and pore creating material are put into mixer；Secondary mixing：Mixed once material and the larger remaining Iron Ore Powder of granularity are put into mixer and are uniformly mixed so as to obtain uniform compound；Uniform compound is put into rectangular shape mould and is pressed into iron block raw material；Iron block raw material are calcined；Crushing and screening.The present invention is using magnesium cement as binding agent and MgO additives, pore creating material is added in compound, using cold moudling technology, porous iron block is pressed into, iron mineral powder agglomeration efficiency is improved, the metallurgical performance of iron block is improved, simplify the technological process of production, the use of adhesive in agglomerates of sintered pellets is reduced, iron ore deposit is extended, improves the volume density and blast fumance efficiency of iron block.
Description
Technical field
The present invention relates to blast furnace raw material preparation method, particularly a kind of method of iron mineral powder agglomeration.
Background technology
Agglomeration of fine ore be metal mining powder by can not directly enter stove after dispensing, method manually causes to meet smelting will
The nugget asked.Agglomeration of fine ore is the important step that raw material prepares before smelting, and it had both expanded the source of raw materials for metallurgy, and changed again
It has been apt to the quality of raw material.
The main method of iron mineral powder agglomeration has two kinds of sintering and pelletizing.Sintering is by particulate iron-bearing material and fuel, flux
Coordinate according to a certain percentage, then the wetting that adds water, mixing is distributed on sintering machine, by igniting, exhausting, and by sintering feed
Fuel combustion produces high temperature, and then occurs a series of physical-chemical reaction, and generating portion low melting point forms certain amount
Liquid phase, by iron mineral wetting of particulates bond get up, after cooling formed with some strength porous block product --- sintering
Ore deposit.Fine ore is first added appropriate moisture and binding agent that viscous consistency, the green-ball with sufficient intensity is made by pelletizing, through drying, pre-
It is calcined after heat in oxidizing atmosphere, makes green-ball conglomeration, pellet is made.
Pelletizing production technique needs to add to being typically only capable to handle in the higher iron ore concentrate of the thinner grade of granularity, balling process
Binding agent bentonite, can so reduce the pelletizing grade increase blast furnace quantity of slag, and blast furnace needs more than 1250 DEG C using pellet
High temperature oxidation roasting, consumption mass energy and discharge great amount of carbon dioxide, while pellet structure is relatively compact, reproducibility is relative
Porous sintered ore deposit is lower；Although sintering process can handle the Iron Ore Powder of various grades, sintering finished rate is relatively low (only to exist
70% or so), capacity usage ratio is low (sintering machine all has 50% or so air leak rate of air curtain), and sintering coke powder or coal dust are produced largely
Sulfide and nitride, pollute atmospheric environment.Addition material containing magnesia has not been cohesive action in current agglomerates of sintered pellets, simply
Play regulation agglomerates of sintered pellets metallurgical performance, its addition adds agglomerates of sintered pellets adhesive usage amount, reduces sintered balls nodulizing
Iron grade, add energy expenditure.
Patent application publication CN104232884A, discloses a kind of method of iron mineral powder agglomeration, and this method can be integrated
Using resource, expand the raw material type of ironmaking, remove objectionable impurities, reclaim beneficial element, environmental protection improves the smelting of ore
Golden performance.But this method is still using the metallurgical iron-containing waste production sintering deposit of simple conventional sintering chassis PROCESS FOR TREATMENT, production
Less efficient, using energy source is low, produce a large amount of sulfide and nitride of pollution air, while metallurgical iron-containing waste is because production
Technique is different with production real condition to cause the fluctuation of its composition larger, so as to easily cause sinter chemical composition to fluctuate.
The content of the invention
The invention provides a kind of method of iron mineral powder agglomeration, it is intended to improves iron ore Iron grade, saves energy expenditure, reduces
Environmental pollution.
A kind of method for iron mineral powder agglomeration that the present invention is provided comprises the following steps：
A. iron ore powder agglomates dispensing：By weight percentage, Iron Ore Powder 85-90%, agstone 5-10%, magnesium cement 3-5%,
Iron Ore Powder therein, is divided into two parts, a part of granularity is 0-1mm, and a part of granularity is 1- by pore creating material 0.5% by granularity
5mm；
B. mixed once：Iron Ore Powder, 5-10% agstone, 3-5% that granularity is 0-1mm are put into mixer
Magnesium cement and 0.5% pore creating material, incorporation time 3-5min, and addition material gross mass 2-4% water steams in mixed process
Vapour, obtains mixed once material；
C. two mixing：Mixed once material and granularity are put into mixer for 1-5mm remaining Iron Ore Powder and mixed, mixing
Time 2-3min, and material gross mass 3-4% water vapour is added in mixed process, be uniformly mixed material；
D. suppress：Uniform compound is put into rectangular shape mould and is pressed into iron block raw material；
E. high pressure is calcined：Iron block raw material are 2.0-8.0Mpa in pressure, and temperature is roasting under conditions of 200-400 DEG C, roasting
The burning time is chlorine element in 15-30min, removing iron block；
F. crushing and screening：By roasting iron block crushing and screening, granularity is less than 5mm return dispensing, 5-20mm for finished product
Porous iron block, dual alkalinity R=1.10-1.50, the TFe weight percent content of the porous iron block of finished product are 54-63%.
Magnesium cement in described step a is magnesia oxychloride cement, the mesh of granularity≤200；Pore creating material in described step a is
Ball-type plastic foam, average diameter is 0.1-2mm.
It is of the invention compared with existing similar technique, it significantly has the beneficial effect that：
Using magnesium cement as binding agent and MgO additives, pore creating material is added in compound, using cold moudling technology, pressure
Porous iron block is made, iron mineral powder agglomeration efficiency is improved, the metallurgical performance of iron block is improved, simplifies the technological process of production, reduces
The use of adhesive, improves iron ore Iron grade, reduces energy expenditure, extend in agglomerates of sintered pellets (quick lime, bentonite)
Iron ore deposit, improves the volume density and blast fumance efficiency of iron block, reduces environmental pollution.
Embodiment
The present invention is described in more detail below by embodiment.
Embodiment 1
By dual alkalinity R=1.10, TFe content be 63% requirement dispensing, by weight percentage：Iron Ore Powder
89.5%th, agstone 5%, magnesium cement 5%, average diameter are 0.1-2mm ball-type plastic foam pore creating material 0.5%, it
In Iron Ore Powder be divided into two parts by granularity, a part of granularity is 0-1mm, and a part of granularity is 1-5mm；It is put into mixer
Granularity is xx-yy Iron Ore Powder, 5% agstone, 5% magnesium cement and 0.5% pore creating material are mixed, incorporation time
3min, and in mixed process add gross mass 2% water vapour, obtain mixed once material；It is by mixed once material and granularity
1-5mm remaining Iron Ore Powder is put into mixing in mixer, mixing time 2min, and the addition gross mass 4% in mixed process
Water vapour, be uniformly mixed material；Uniform compound is put into rectangular shape mould and is pressed into iron block raw material；Iron block raw material
It is 3.0Mpa in pressure, roasting iron block is carried out crushing and screening, obtain grain by temperature under conditions of 200 DEG C, to be calcined 15min
Spend the porous iron block of finished product for 5~20mm.
Embodiment 2
By dual alkalinity R=1.50, TFe content be 55% requirement dispensing, by weight percentage：Iron Ore Powder
84.5%th, agstone 10%, magnesium cement 5%, average diameter are 0.1-2mm ball-type plastic foam pore creating material 0.5%, it
In Iron Ore Powder be divided into two parts by granularity, a part of granularity is 0-1mm, and a part of granularity is 1-5mm；It is put into mixer
Granularity is 0-1mm Iron Ore Powder, 10% agstone, 5% magnesium cement and 0.5% pore creating material are mixed, incorporation time
5min, and in mixed process add gross mass 3% water vapour, obtain mixed once material；It is by mixed once material and granularity
1-5mm remaining Iron Ore Powder is put into mixing in mixer, incorporation time 3min, and the addition gross mass 4% in mixed process
Water vapour, be uniformly mixed material；Uniform compound is put into rectangular shape mould and is pressed into iron block raw material；Iron block raw material
It is 4.0Mpa in pressure, roasting iron block is carried out crushing and screening, obtain grain by temperature under conditions of 260 DEG C, to be calcined 20min
Spend for the finished product for 5~20mm.
Embodiment 3
By dual alkalinity R=1.20, TFe content be 59% requirement dispensing, by weight percentage：Iron Ore Powder
89.5%th, agstone 6%, magnesium cement 4%, average diameter are 0.1-2mm ball-type plastic foam pore creating material 0.5%, it
In Iron Ore Powder be divided into two parts by granularity, a part of granularity is 0-1mm, and a part of granularity is 1-5mm；It is put into mixer
Granularity is 0-1mm Iron Ore Powder, 6% agstone, 4% magnesium cement and 0.5% pore creating material are mixed, incorporation time
4min, and in mixed process add gross mass 3% water vapour, obtain mixed once material；It is by mixed once material and granularity
1-5mm remaining Iron Ore Powder is put into mixing in mixer, incorporation time 2min, and the addition gross mass 4% in mixed process
Water vapour, be uniformly mixed material；Uniform compound is put into rectangular shape mould and is pressed into iron block raw material；Iron block raw material
It is 8.0Mpa in pressure, roasting iron block is carried out crushing and screening, obtain grain by temperature under conditions of 400 DEG C, to be calcined 30min
Spend the finished product for 5-20mm.
Embodiment 4
By dual alkalinity R=1.30, TFe content be 60% requirement dispensing, by weight percentage：Iron Ore Powder
87.5%th, agstone 8%, magnesium cement 3%, average diameter are 0.1-2mm ball-type plastic foam pore creating material 0.5%, it
In Iron Ore Powder be divided into two parts by granularity, a part of granularity is 0-1mm, and a part of granularity is 1-5mm；It is put into mixer
Granularity is 0-1mm Iron Ore Powder, 8% agstone, 3% magnesium cement and 0.5% pore creating material are mixed, incorporation time
3min, and in mixed process add gross mass 2% water vapour, obtain mixed once material；It is by mixed once material and granularity
1-5mm remaining Iron Ore Powder is put into mixing in mixer, incorporation time 2min, and the addition gross mass 4% in mixed process
Water vapour, be uniformly mixed material；Uniform compound is put into rectangular shape mould and is pressed into iron block raw material；Iron block raw material
It is 6.0Mpa in pressure, roasting iron block is carried out crushing and screening, obtain grain by temperature under conditions of 300 DEG C, to be calcined 25min
Spend the finished product for 5-20mm.
The embodiment effect of table 1
| Embodiment | TFe% | Yield rate % | Rotary drum coefficient | FeO% | Reduction degree |
| Embodiment 1 | 63.01 | 94.67 | 93.34 | 2.12 | 86.34 |
| Embodiment 2 | 56.23 | 93.33 | 90.34 | 1.34 | 89.23 |
| Embodiment 3 | 59.23 | 90.45 | 89.34 | 3.12 | 84.37 |
| Embodiment 4 | 60.12 | 88.67 | 84.34 | 4.34 | 83.56 |
Claims (2)
1. a kind of method of iron mineral powder agglomeration, it is characterized in that this method comprises the following steps：
A. iron ore powder agglomates dispensing：By weight percentage, Iron Ore Powder 85-90%, agstone 5-10%, magnesium cement 3-5%, pore-creating
Iron Ore Powder therein, is divided into two parts, a part of granularity is 0-1mm, and a part of granularity is 1-5mm by agent 0.5% by granularity；
B. mixed once：Iron Ore Powder, 5-10% agstone, 3-5% magnesium water that granularity is 0-1mm are put into mixer
Mud and 0.5% pore creating material, incorporation time 3-5min, and material gross mass 2-4% water vapour is added in mixed process, obtain
To mixed once material；
C. two mixing：Mixed once material and granularity are put into mixer for 1-5mm remaining Iron Ore Powder and mixed, incorporation time
2-3min, and material gross mass 3-4% water vapour is added in mixed process, be uniformly mixed material；
D. suppress：Uniform compound is put into rectangular shape mould and is pressed into iron block raw material；
E. high pressure is calcined：Iron block raw material are 2.0-8.0Mpa in pressure, and temperature is roasting under conditions of 200-400 DEG C, during roasting
Between be 15-30min, removing iron block in chlorine element；
F. crushing and screening：By roasting iron block crushing and screening, granularity is less than 5mm return dispensing, 5-20mm for finished product it is porous
Iron block, dual alkalinity R=1.10-1.50, the TFe weight percent content of the porous iron block of finished product are 54-63%.
2. the method for a kind of iron mineral powder agglomeration according to claim 1, it is characterized in that the magnesium cement in step a is chlorine oxygen magnesium
Cement, the mesh of granularity≤200；Pore creating material in step a is ball-type plastic foam, and average diameter is 0.1-2mm.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510837483.5A CN105331808B (en) | 2015-11-26 | 2015-11-26 | A kind of method of iron mineral powder agglomeration |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510837483.5A CN105331808B (en) | 2015-11-26 | 2015-11-26 | A kind of method of iron mineral powder agglomeration |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN105331808A CN105331808A (en) | 2016-02-17 |
| CN105331808B true CN105331808B (en) | 2017-08-29 |
Family
ID=55282566
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201510837483.5A Active CN105331808B (en) | 2015-11-26 | 2015-11-26 | A kind of method of iron mineral powder agglomeration |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN105331808B (en) |
Families Citing this family (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110029223B (en) * | 2019-04-03 | 2021-07-09 | 辽宁科技大学 | Magnesium-based iron coke composite pellet and preparation method thereof |
| CN111549215A (en) * | 2020-06-30 | 2020-08-18 | 刘浩睿 | Iron ore processing method |
| CN112342374B (en) * | 2020-11-06 | 2022-04-01 | 建龙西林钢铁有限公司 | Method for producing pellet ore by using low-moisture mineral powder |
| CN113564353B (en) * | 2021-08-07 | 2023-03-03 | 湘潭炜达机电制造有限公司 | Iron ore powder agglomeration method and extrusion molding die |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101671752A (en) * | 2009-04-23 | 2010-03-17 | 北京科技大学 | Method for producing directly reduced pellets by adding pore-forming agent and organic binder |
| CN102268543A (en) * | 2011-08-30 | 2011-12-07 | 北京科技大学 | Shaping adhesive for chromium powder ore cold-pressed pellets and using method of shaping adhesive |
| CN102719659A (en) * | 2011-03-30 | 2012-10-10 | 宝山钢铁股份有限公司 | Sinter mixture granulating method |
| CN104232884A (en) * | 2013-06-24 | 2014-12-24 | 凌敬平 | Agglomeration method of iron ore powder |
-
2015
- 2015-11-26 CN CN201510837483.5A patent/CN105331808B/en active Active
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101671752A (en) * | 2009-04-23 | 2010-03-17 | 北京科技大学 | Method for producing directly reduced pellets by adding pore-forming agent and organic binder |
| CN102719659A (en) * | 2011-03-30 | 2012-10-10 | 宝山钢铁股份有限公司 | Sinter mixture granulating method |
| CN102268543A (en) * | 2011-08-30 | 2011-12-07 | 北京科技大学 | Shaping adhesive for chromium powder ore cold-pressed pellets and using method of shaping adhesive |
| CN104232884A (en) * | 2013-06-24 | 2014-12-24 | 凌敬平 | Agglomeration method of iron ore powder |
Non-Patent Citations (1)
| Title |
|---|
| 影响氯氧镁水泥强度因素的初步探讨;童义平;《湛江师范学院学报》;19941231(第2期);第53-56页 * |
Also Published As
| Publication number | Publication date |
|---|---|
| CN105331808A (en) | 2016-02-17 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN101649392B (en) | Pelletizing method of ilmenite concentrates and pellet binder | |
| CN105331808B (en) | A kind of method of iron mineral powder agglomeration | |
| KR101304686B1 (en) | Part reduced iron for blast furnace and method thereof | |
| CN106591575B (en) | Low energy consumption coal-pressing ball and preparation method thereof | |
| CN105132673B (en) | A kind of method for reducing carbon containing dust pellet material composite agglomeration solid fuel consumption | |
| CN104259470B (en) | A kind of low pine is than the production method of high fine powder rate 100 order reduced iron powders | |
| CN104313308B (en) | Iron ore low-carbon sintering method | |
| CN105087907B (en) | A kind of ferrochrome powder mine sintering technique | |
| CN104556039A (en) | Method for preparing solid calcium carbide | |
| CN108070713B (en) | Iron ore sintering method using light-burned magnesium balls | |
| CN103276294B (en) | Method for rapidly reducing nickel slag to produce iron-nickel-copper alloy powder in kiln under reducing atmosphere | |
| CN101407858A (en) | Preparation of carbonaceous composite pellet containing manganese | |
| CN103436694A (en) | Method for preparing chrome ore pellets | |
| JP5194378B2 (en) | Method for producing sintered ore | |
| CN103627895B (en) | Production method for sintering chromium powder ore by continuous strand sinter machine | |
| CN103451421B (en) | A kind of preparation method of blast furnace gas mud pre-reduced pellet | |
| CN106811597A (en) | A kind of method that utilization limekiln exhaust gas produce blast furnace cold-bonded carbonaceous pelletizing | |
| CN100355910C (en) | Composite carbon-containing pellet | |
| CN104726698B (en) | Acid composition metal pellet and its production technology | |
| WO2023015765A1 (en) | Iron ore powder briquetting method and an extrusion molding die | |
| CN104711418A (en) | Method for using metallurgical iron-bearing dust in iron-making | |
| CN101691621A (en) | Method of producing sponge iron from carbon dedusting ash and iron scales | |
| WO2010041770A1 (en) | Blast furnace operating method using carbon-containing unfired pellets | |
| JP2017505379A (en) | Production method of manganese-containing alloy iron | |
| CN103160683A (en) | Roasting pretreatment method for high crystal water content iron ore |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant |