CN105714103A - Method for producing sintering ore with iron ore concentrate as main iron materials - Google Patents
Method for producing sintering ore with iron ore concentrate as main iron materials Download PDFInfo
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- CN105714103A CN105714103A CN201410740807.9A CN201410740807A CN105714103A CN 105714103 A CN105714103 A CN 105714103A CN 201410740807 A CN201410740807 A CN 201410740807A CN 105714103 A CN105714103 A CN 105714103A
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Abstract
The invention provides a method for producing sintering ore with iron ore concentrate as main iron materials. The method comprises the steps that the iron ore concentrate, return fines with the particle size being 3-5 mm, coke powder with the particle size less than 1 mm, limestone, chondrodite and calcium oxide are added with water and then made into mixed pellets A through a powerful mixer; the iron ore concentrate, return fines with the particle size less than 3 mm, coke power with the particle size being 1-5 mm, limestone with the particle size being 1-2 mm, chondrodite with the particle size being 1-2 mm and calcium oxide are added with water and then made into mixed pellets B through the powerful mixer; and the mixed pellets A, the mixed pellets B and coke powder with the particle size less than 1 mm are mixed evenly to form a sintering mixture C, and the sintering mixture C is subjected to material distribution and sintering on a sintering unit to be manufactured into the finished sintering ore. By means of the method, the air permeability and sintering speed of a sintering bed can be improved, so that the sintering yield of the iron ore concentrate is increased, and sintering burn-up of the iron ore concentrate is reduced; and meanwhile, the mineralization performance of iron-containing raw materials and generation of calcium ferrite can be enhanced, the strength of the sintering ore can be improved, and the rate of finished products of the sintering ore can be increased.
Description
Technical field
The invention belongs to ironmaking production technical field, particularly to a kind of sinter production method with iron ore concentrate for main iron charge.
Background technology
Iron ore is the important source material producing sintering deposit, and the sintering iron charge of certain iron-smelter is broadly divided into two large divisions, and one is the fine iron breeze that is produced from own mine, and two is the rich ore powder of import, such as the rich ore powder of Brazil and Australia.In recent years along with the continuous expansion of domestic iron and steel production capacity, the demand of iron ore being continuously increased, causes that iron ore price goes up, iron and steel enterprise's production cost increases, have to the yield that improves own mine iron ore concentrate for these many iron and steel enterprises, to alleviate the rising of steel cost.
And self-produced iron ore concentrate granularity is relatively thin ,-200 purposes account for more than 90%, and sintering character is poor.Concentrate proportioning can make permeability of sintering material bed worsen after improving, and sintering negative pressure raises, and fan capacity can not meet production requirement, has a strong impact on sintering deposit all technical.For improving permeability of sintering material bed, generally take following measure: some import rich ore powders of (1) adapted, improve raw materials for sintering condition；(2) the thinning bed of material, reduces machine speed, to delay its response speed, it is ensured that Ore-forming time.Home-made concentrate proportioning being made not improve with addition of import rich ore powder, iron and steel enterprise's production cost improves；The thinning bed of material, reduces machine speed and Sintering Yield can be made to reduce.
Number of patent application 200810302466.1 discloses a kind of granulating sinter mixture method, adopts twice granulation, and first add water prepared iron ore concentrate bead by part iron ore concentrate and quick lime mixing；Then by iron ore concentrate bead and coke powder, flux, return mine, gas ash and Iron Ore Powder and the mixing of remaining iron ore concentrate, carry out secondary granulation.Although have employed secondary to granulate, improve the breathability of sinter bed to a certain extent, but the method still with the addition of the rich ore powder of significant proportion, and not considering to return mine granularity, fuel granularity and flux granularity to iron ore concentrate sintered impact.
Number of patent application 201310181541.4 discloses a kind of with iron ore concentrate for main iron charge sintering mine making method, including following step successively: 1, dispensing: iron ore concentrate, BF return fines, flux and coke powder raw material, weigh up according to weight portion；2, part material profit mill processes: a portion iron ore concentrate first mixes profit mill before mixing in advance with the BF return fines less than 3mm；3, part material brute force batch mixer mixing: by another part iron ore concentrate with slaked lime through powerful batch mixer mixing；4, mixing: the compound after above-mentioned process, then be mixed into mix pellet with remaining iron ore concentrate and other sintering feed；5, sintering: mixing pellet is carried out on agglomerating plant cloth, sintering, obtains finished product sintering deposit.The method merotomizes raw materials for sintering, different piece each mixes, then all raw materials for sintering mixing, to a certain extent can Intensified support, improve sinter quality, but the method easily causes raw materials for sintering component segregation, also without considering the impact on granulation and sinter quality of flux and fuel granularity.
Number of patent application 201310236432.8 discloses the industrial production process of a kind of high fine powder rate ore agglomerates, after being mixed by the bentonite of iron-bearing material percentage by weight 2%～6%, prepares into acid green-ball, and green-ball granularity is 4～10mm；By raw material it is: the high-basicity sintering compound of iron ore concentrate or iron ore concentrate and the mixing of ultra-fine iron ore concentrate, Imported powder iron ore, limestone, light dolomite, quick lime and coke powder is after batch mixer, a rerolling machine carry out mixed pelletization respectively, before entering sintering feed belt, being added by acidity green-ball and constitute soda acid compound, the addition of green-ball accounts for the 20%～60% of high-basicity sintering material percentage by weight；Soda acid compound passing through swinging belt, wide belt, the nine roller feeder cloth to pallet, by lighting a fire, roasting obtains high-quality ore agglomerates.The method is to twice granulation of sinter mixture, it is possible to improve the breathability of high fine powder rate sinter bed, but the method still with the addition of the import rich ore of high price, and the basicity easily caused by sintering deposit fluctuates.
Summary of the invention
The present invention provides a kind of sinter production method with iron ore concentrate for main iron charge, the high problem low with sinter quality of sintering burnup caused because sintered mixture ventilation difference when its object is to solve iron ore concentrate sintered at high proportion, thus improving intensity and the yield rate of sintering deposit, reduce iron ore concentrate sintered burnup.
For this, the solution that the present invention takes is:
A kind of sinter production method with iron ore concentrate for main iron charge, its concrete grammar and step be:
1, by iron ore concentrate, return mine, coke powder, limestone, magnesite and quick lime composition compound A；Each constituent mass percent is: iron ore concentrate 65%～75%, return mine 5%～15%, coke powder 3%～5%, limestone 5%～10%, magnesite 1%～3%, the amount of quick lime is added according to the basicity of compound A；Wherein, granularity of returning mine is 3～5mm, and coke fines size is less than 1mm, and limestone granularity is less than 1mm, and magnesite granularity is less than 1mm；Compound A is added water, through intensive mixer mixed pelletization, pellet A must be mixed.
2, by iron ore concentrate, return mine, coke powder, limestone, magnesite and quick lime composition compound B, each constituent mass percent is: iron ore concentrate 65%～75%, return mine 5%～15%, coke powder 3%～5%, limestone 5%～10%, magnesite 1%～3%, the amount of quick lime is added according to the basicity of compound B；Wherein, granularity of returning mine is less than 3mm, and coke fines size is 1～5mm, and limestone granularity is 1～2mm, and magnesite granularity is 1～2mm；Compound B is added water, through intensive mixer mixed pelletization, pellet B must be mixed.
3, mixing pellet A, mixing pellet B and coke powder mix homogeneously, and form sinter mixture C, its mass percent is: mixing pellet A49%～60%, mixes pellet B39%～50%, the granularity coke powder 0.5%～1.5% less than 1mm；By sinter mixture C cloth, sintering on agglomerating plant, prepare finished product sintering deposit.
The basicity of described mixing pellet A and mixing pellet B is 1.9～2.2.
The invention have the benefit that
1, the present invention can improve the granularmetric composition of sinter mixture, improves breathability and the sintering velocity of sinter bed, thus improving iron ore concentrate sintered yield, reduces the burnup of Haematite sintering.
2, raw materials for sintering distribution is granulated by the present invention according to characteristic and the granularmetric composition of raw materials for sintering, is conducive to the mineralising performance of strengthening iron-bearing material and the generation of calcium ferrite, improves intensity and the yield rate of sintering deposit.
Detailed description of the invention
Below in conjunction with embodiment, the invention will be further described, and in embodiment, each component percentages is mass percent.
Embodiment 1:
By iron ore concentrate, return mine, coke powder, limestone, magnesite and quick lime composition compound A, wherein: iron ore concentrate 70%, granularity be 3～5mm return mine 11%, the granularity coke powder 4% less than 1mm, the granularity limestone 6.5% less than 1mm, the granularity magnesite 2.5% less than 1mm, quick lime 6%.Being added water by compound A, through intensive mixer mixed pelletization, must mix pellet A, its basicity is 1.95.
By iron ore concentrate, return mine, coke powder, limestone, magnesite and quick lime composition compound B, wherein: iron ore concentrate 71%, granularity returns mine 10% less than 3mm, granularity is the coke powder 3.9% of 1～5mm, granularity is the limestone 7.6% of 1～2mm, and granularity is the magnesite 2% of 1～2mm, quick lime 5.5%.Being added water by compound B, through intensive mixer mixed pelletization, must mix pellet B, its basicity is 1.95.
By mixing pellet A, mixing pellet B and coke powder Homogeneous phase mixing, form sinter mixture C, wherein mixing pellet A58%, mixing pellet B41%, the granularity coke powder 1% less than 1mm, by sinter mixture C cloth, sintering on agglomerating plant, prepare finished product sintering deposit.
Assay shows: compared with the original production process not adopting the present invention, and sintered mixture ventilation index of the present invention improves 0.035JPU, and sintering usage factor improves 0.198t/ (m2.h), sintering deposit yield rate is brought up to 85.8% by 82.3%, and drum strength is brought up to 78.3% by 75.4%, and reduction degree is brought up to 80.8% by 77.6%.
Embodiment 2:
By iron ore concentrate, return mine, coke powder, limestone, magnesite and quick lime composition compound A, wherein iron ore concentrate 68%, granularity is that 3～5mm returns mine 11%, granularity is less than 1mm coke powder 4.5%, granularity is less than 1mm limestone 8.5%, and granularity is less than 1mm magnesite 2%, quick lime 6%.Being added water by compound A, through intensive mixer mixed pelletization, must mix pellet A, its basicity is 2.
By iron ore concentrate, return mine, coke powder, limestone, magnesite and quick lime composition compound B, wherein iron ore concentrate 70%, granularity returns mine 8% less than 3mm, granularity is 1～5mm coke powder 4.5%, granularity is 1～2mm limestone 8.5%, and granularity is 1～2mm magnesite 2%, quick lime 7%.Being added water by compound B, through intensive mixer mixed pelletization, must mix pellet B, its basicity is 2.
To mix pellet A, mixing pellet B and coke powder Homogeneous phase mixing, and form sinter mixture C, wherein mixing pellet A is 55.4%, and mixing pellet B is 43.4%, and the granularity coke powder less than 1mm is 1.2%.By sinter mixture C cloth, sintering on agglomerating plant, prepare finished product sintering deposit.
Assay shows: compared with the original production process not adopting the present invention, and sintered mixture ventilation index of the present invention improves 0.032JPU, and sintering usage factor improves 0.205t/ (m2.h), sintering deposit yield rate is brought up to 85.1% by 82.3%, and drum strength is brought up to 81.8% by 79.6%, and reduction degree is brought up to 82.4% by 79.5%.
Claims (2)
1. the sinter production method with iron ore concentrate for main iron charge, it is characterised in that concrete grammar and step be:
(1) by iron ore concentrate, return mine, coke powder, limestone, magnesite and quick lime composition compound A；Each constituent mass percent is: iron ore concentrate 65%～75%, return mine 5%～15%, coke powder 3%～5%, limestone 5%～10%, magnesite 1%～3%, the amount of quick lime is added according to the basicity of compound A；Wherein, granularity of returning mine is 3～5mm, and coke fines size is less than 1mm, and limestone granularity is less than 1mm, and magnesite granularity is less than 1mm；Compound A is added water, through intensive mixer mixed pelletization, pellet A must be mixed；
(2) by iron ore concentrate, return mine, coke powder, limestone, magnesite and quick lime composition compound B, each constituent mass percent is: iron ore concentrate 65%～75%, return mine 5%～15%, coke powder 3%～5%, limestone 5%～10%, magnesite 1%～3%, the amount of quick lime is added according to the basicity of compound B；Wherein, granularity of returning mine is less than 3mm, and coke fines size is 1～5mm, and limestone granularity is 1～2mm, and magnesite granularity is 1～2mm；Compound B is added water, through intensive mixer mixed pelletization, pellet B must be mixed；
(3) mixing pellet A, mixing pellet B and coke powder mix homogeneously, and form sinter mixture C, its mass percent is: mixing pellet A49%～60%, mixes pellet B39%～50%, the granularity coke powder 0.5%～1.5% less than 1mm；By sinter mixture C cloth, sintering on agglomerating plant, prepare finished product sintering deposit.
2. the sinter production method with iron ore concentrate for main iron charge according to claim 1, it is characterised in that the basicity of described mixing pellet A and mixing pellet B is 1.9～2.2.
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106350667A (en) * | 2016-09-12 | 2017-01-25 | 鞍钢股份有限公司 | Super-thick bed layer sintering method for reducing content of small particles by pre-sintering |
| CN110727917A (en) * | 2019-09-04 | 2020-01-24 | 攀钢集团攀枝花钢铁研究院有限公司 | Vanadium-titanium magnetite concentrate blast furnace smelting added imported ore and critical unit price analysis method thereof |
| CN113789439A (en) * | 2021-09-18 | 2021-12-14 | 重庆钢铁股份有限公司 | Preparation process of sintering material and sintering process |
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| CN1962897A (en) * | 2006-11-30 | 2007-05-16 | 武汉钢铁(集团)公司 | Sintered ore capable of improving viscosity of blast furnace slag and process for preparing same |
| CN101665867A (en) * | 2009-10-16 | 2010-03-10 | 武汉钢铁(集团)公司 | Method for increasing grade of sinter |
| CN101928823A (en) * | 2009-06-22 | 2010-12-29 | 鞍钢股份有限公司 | Sintering method of iron ore powder with high content of crystal water |
| CN103614548A (en) * | 2013-11-12 | 2014-03-05 | 山西太钢不锈钢股份有限公司 | Method for producing sinter from hematite concentrate powder |
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2014
- 2014-12-01 CN CN201410740807.9A patent/CN105714103A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
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| JPS6052533A (en) * | 1983-08-31 | 1985-03-25 | Nippon Kokan Kk <Nkk> | Preliminary treatment of sintered raw material |
| CN1962897A (en) * | 2006-11-30 | 2007-05-16 | 武汉钢铁(集团)公司 | Sintered ore capable of improving viscosity of blast furnace slag and process for preparing same |
| CN101928823A (en) * | 2009-06-22 | 2010-12-29 | 鞍钢股份有限公司 | Sintering method of iron ore powder with high content of crystal water |
| CN101665867A (en) * | 2009-10-16 | 2010-03-10 | 武汉钢铁(集团)公司 | Method for increasing grade of sinter |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106350667A (en) * | 2016-09-12 | 2017-01-25 | 鞍钢股份有限公司 | Super-thick bed layer sintering method for reducing content of small particles by pre-sintering |
| CN110727917A (en) * | 2019-09-04 | 2020-01-24 | 攀钢集团攀枝花钢铁研究院有限公司 | Vanadium-titanium magnetite concentrate blast furnace smelting added imported ore and critical unit price analysis method thereof |
| CN110727917B (en) * | 2019-09-04 | 2022-08-05 | 攀钢集团攀枝花钢铁研究院有限公司 | Vanadium-titanium magnetite concentrate blast furnace smelting added imported ore and critical unit price analysis method thereof |
| CN113789439A (en) * | 2021-09-18 | 2021-12-14 | 重庆钢铁股份有限公司 | Preparation process of sintering material and sintering process |
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Application publication date: 20160629 |