CN101126121A - Production method of pre-reduced composite sinter - Google Patents
Production method of pre-reduced composite sinter Download PDFInfo
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- CN101126121A CN101126121A CNA2007101574573A CN200710157457A CN101126121A CN 101126121 A CN101126121 A CN 101126121A CN A2007101574573 A CNA2007101574573 A CN A2007101574573A CN 200710157457 A CN200710157457 A CN 200710157457A CN 101126121 A CN101126121 A CN 101126121A
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- Prior art keywords
- sinter
- ore
- furnace
- production method
- pellet ore
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- 238000004519 manufacturing process Methods 0.000 title claims abstract description 22
- 239000002131 composite material Substances 0.000 title claims abstract description 14
- 230000002829 reductive effect Effects 0.000 title description 2
- 239000008188 pellet Substances 0.000 claims abstract description 25
- 238000005245 sintering Methods 0.000 claims abstract description 19
- 238000000034 method Methods 0.000 claims abstract description 13
- 239000002994 raw material Substances 0.000 claims abstract description 10
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical group [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 claims description 44
- 229910052742 iron Inorganic materials 0.000 claims description 22
- 230000002378 acidificating effect Effects 0.000 claims description 16
- 239000002817 coal dust Substances 0.000 claims description 14
- 239000000203 mixture Substances 0.000 claims description 14
- 239000000463 material Substances 0.000 claims description 12
- 239000012141 concentrate Substances 0.000 claims description 11
- 239000000440 bentonite Substances 0.000 claims description 9
- 229910000278 bentonite Inorganic materials 0.000 claims description 9
- SVPXDRXYRYOSEX-UHFFFAOYSA-N bentoquatam Chemical compound O.O=[Si]=O.O=[Al]O[Al]=O SVPXDRXYRYOSEX-UHFFFAOYSA-N 0.000 claims description 9
- 230000004907 flux Effects 0.000 claims description 9
- 239000000446 fuel Substances 0.000 claims description 9
- 239000002253 acid Substances 0.000 abstract description 4
- 239000000843 powder Substances 0.000 abstract description 2
- 239000003245 coal Substances 0.000 abstract 1
- 238000005453 pelletization Methods 0.000 description 7
- 238000003723 Smelting Methods 0.000 description 4
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 3
- 239000000571 coke Substances 0.000 description 3
- -1 flux Substances 0.000 description 3
- 239000008187 granular material Substances 0.000 description 3
- ODINCKMPIJJUCX-UHFFFAOYSA-N Calcium oxide Chemical compound [Ca]=O ODINCKMPIJJUCX-UHFFFAOYSA-N 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- UFHFLCQGNIYNRP-UHFFFAOYSA-N Hydrogen Chemical compound [H][H] UFHFLCQGNIYNRP-UHFFFAOYSA-N 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 239000000292 calcium oxide Substances 0.000 description 1
- 235000012255 calcium oxide Nutrition 0.000 description 1
- 229910052799 carbon Inorganic materials 0.000 description 1
- 150000001875 compounds Chemical class 0.000 description 1
- 238000005265 energy consumption Methods 0.000 description 1
- 239000004744 fabric Substances 0.000 description 1
- 238000005469 granulation Methods 0.000 description 1
- 230000003179 granulation Effects 0.000 description 1
- 229910052739 hydrogen Inorganic materials 0.000 description 1
- 239000001257 hydrogen Substances 0.000 description 1
- 238000005272 metallurgy Methods 0.000 description 1
- 238000002360 preparation method Methods 0.000 description 1
- 238000005204 segregation Methods 0.000 description 1
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Abstract
The invention relates to a production method of prereduced composite sintering ore, which mixes two furnace charges of high-alkalinity sintering ore and acid pellet ore, adds coal powder into the raw material for producing pellets of acid pellet ore, and then sinters the uniformly mixed high-alkalinity sintering ore and acid pellet ore together on a sintering machine to produce the furnace charge for prereduced blast furnace. The furnace charge prepared by the method has higher grade, and simplifies the operation of the blast furnace.
Description
Technical field
The present invention relates to a kind of production method of pre-reducing composite sinter.
Background technology
At present, in the production of metallurgy industry agglomerate, generally the blast furnace burden of Shi Yonging is to use single agglomerate, passes through blast furnace ironmaking process again, produces agglomerate; Perhaps use single pellet, pass through blast furnace ironmaking process again, produce agglomerate.
Above-mentioned method burden structure is single, needs agglomerate furnace charge and pellet furnace charge all will must be equipped with the ore deposit groove of a plurality of blast furnaces through sintering process independently, and groove investment in ore deposit is big, the energy consumption height.
Summary of the invention
The purpose of this invention is to provide a kind of less investment, simplify the blast-furnace burden facility, simple to operate, produce the furnace charge grade higher, reduce coke ratio, improve the production method of the pre-reducing composite sinter of blast-furnace smelting efficient.
In order to address the above problem, the present invention by the following technical solutions:
A kind of production method of pre-reducing composite sinter, it is characterized in that: this method is to adopt high basicity sinter and two kinds of furnace charges of acidic pellet ore to mix, and in the raw material of acidic pellet ore system ball with addition of coal dust, then high basicity sinter and the acidic pellet ore that mixes carried out sintering, production prereduction blast furnace furnace charge together on sinter machine.
The part by weight of high basicity sinter and two kinds of furnace charges of acidic pellet ore is (50-80): (50-20).
In the high basicity sinter production process, the part by weight of each composition is: iron-bearing material 70-80, flux 27-14, fuel 3-6; In the production process of acidic pellet ore, the part by weight of each composition is: iron ore concentrate 80-90, bentonite 0.5-1.5, coal dust 8.5-19.5.
Compared with prior art, the invention has the beneficial effects as follows:
1, becomes high basicity sinter that present blast furnace generally adopts and be a kind of pre-reducing composite sinter blast furnace burden with addition of two kinds of furnace charges of acidic pellet ore, on sinter machine, carry out sintering together, production prereduction blast furnace furnace charge, can reduce the ore deposit groove quantity of newly-built blast furnace, reduce ore deposit groove investment, and simplify blast furnace operating.
2, solved the cloth segregation problem of high basicity sinter when acidic pellet ore is smelted, made the blast furnace burden potential of hydrogen more even.
3, because the pelletizing in the pre-reducing composite sinter furnace charge contains coal dust, can react, produce metallic iron,, and can improve blast-furnace smelting efficient so blast furnace uses this single Charging stock not only can reduce blast furnace coke ratio with iron ore concentrate.
4, can reduce bentonite proportion in the present pellet, improve the comprehensive grade of furnace charge.
5, owing to be mixed with a large amount of pelletizings in the sinter mixture,, and can adopt, can reduce the sintering power consumption than lower negative pressure and less air quantity sintering so sinter bed can be realized super deep-bed sintering.
Description of drawings
Fig. 1 is a product profile of the present invention.
Among the figure: A is carbonaceous pelletizing
Embodiment
Embodiment 1
A kind of production method of pre-reducing composite sinter, this method is to adopt high basicity sinter and two kinds of furnace charges of acidic pellet ore to mix, and in the raw material of acidic pellet ore system ball with addition of coal dust, then high basicity sinter and the acidic pellet ore that mixes carried out sintering, production prereduction blast furnace furnace charge together on sinter machine.This method steps is:
1. iron-bearing material, flux, fuel are prepared burden by a certain percentage, and mix and granulate; Wherein the weight part ratio of each composition is: iron-bearing material 70, flux 27, fuel 3;
2. iron ore concentrate, bentonite, coal dust are prepared burden by a certain percentage, and carry out mixing and make ball; Wherein the weight part ratio of each composition is: iron ore concentrate 90, bentonite 1.5, coal dust 8.5; The granularity of ball is 5-16mm.
3. the raw material that 2. makes of raw material that 1. step is made and step is according to 1: 1 part by weight batching, goes into to send into sinter machine behind the mixing machine mixing and carry out sintering.
Fig. 1 is the blast furnace prereduced burden material sectional view that adopts novel method to produce, A is exactly a carbonaceous pelletizing among the figure, it is wrapped up by high basicity sinter, in sintering process, the carbon in the pelletizing might be partly or entirely and the iron ore concentrate in the pelletizing react and produce the metallic iron or the easy suboxide of reductive iron.After this furnace charge enters blast furnace, because the ferriferous oxide in the pellet easily reduces, can improve the efficient of blast-furnace smelting, and reduce the blast-furnace smelting coke ratio.
The present invention has drawn the advantage in present production high basicity sinter and the acidic pellet ore technology, with both feed proportioning system, mixing system and granulation and make the ball system and keep, high-basicity sintering compound and acid carbonaceous pelletizing that these two systems are made respectively cooperate by a certain percentage, and in the preparation of pellet with addition of a certain amount of coal dust or coke powder, adopt sinter machine to carry out sintering then, the product behind the sintering is prereduced burden material.
Embodiment 2
A kind of production method of pre-reducing composite sinter, this method steps is:
1. iron-bearing material, flux, fuel are prepared burden by a certain percentage, and mix and granulate; Wherein the weight part ratio of each composition is: iron-bearing material 80, flux 14, fuel 6;
2. iron ore concentrate, bentonite, coal dust are prepared burden by a certain percentage, and carry out mixing and make ball; Wherein the weight part ratio of each composition is: iron ore concentrate 80, bentonite 0.5, coal dust 19.5; The granularity of ball is 5-16mm.
3. the raw material that 2. makes of raw material that 1. step is made and step is according to 3: 2 part by weight batching, goes into to send into sinter machine behind the mixing machine mixing and carry out sintering.
Embodiment 3
A kind of production method of pre-reducing composite sinter, this method steps is:
1. iron-bearing material, flux, fuel are prepared burden by a certain percentage, and mix and granulate; Wherein the weight part ratio of each composition is: iron-bearing material 75, flux 19, fuel 6;
2. iron ore concentrate, bentonite, coal dust are prepared burden by a certain percentage, and carry out mixing and make ball; Wherein the weight part ratio of each composition is: iron ore concentrate 85, bentonite 3, coal dust 12; The granularity of ball is 5-16mm.
3. the raw material that 2. makes of raw material that 1. step is made and step is according to 4: 1 part by weight batching, goes into to send into sinter machine behind the mixing machine mixing and carry out sintering.
Among the above embodiment: iron-bearing material selects concentrate, rich ore powder, assorted material, one or more mixing in returning mine; Flux is one or more mixing in Wingdale, unslaked lime, the wagnerite; Fuel is coke powder or coal dust.
Claims (3)
1. the production method of a pre-reducing composite sinter, it is characterized in that: this method is to adopt high basicity sinter and two kinds of furnace charges of acidic pellet ore to mix, and in the raw material of acidic pellet ore system ball with addition of coal dust, then high basicity sinter and the acidic pellet ore that mixes carried out sintering, production prereduction blast furnace furnace charge together on sinter machine.
2. the production method of a kind of pre-reducing composite sinter according to claim 1 is characterized in that: the part by weight of high basicity sinter and two kinds of furnace charges of acidic pellet ore is (50-80): (50-20).
3. the production method of a kind of pre-reducing composite sinter according to claim 2, it is characterized in that: in the high basicity sinter production process, the part by weight of each composition is: iron-bearing material 70-80, flux 27-14, fuel 3-6; In the production process of acidic pellet ore, the weight percent of each composition is: iron ore concentrate 80-90, bentonite 0.5-1.5, coal dust 8.5-19.5.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNA2007101574573A CN101126121A (en) | 2007-10-16 | 2007-10-16 | Production method of pre-reduced composite sinter |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNA2007101574573A CN101126121A (en) | 2007-10-16 | 2007-10-16 | Production method of pre-reduced composite sinter |
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| CN101126121A true CN101126121A (en) | 2008-02-20 |
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| CNA2007101574573A Pending CN101126121A (en) | 2007-10-16 | 2007-10-16 | Production method of pre-reduced composite sinter |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102312084A (en) * | 2010-06-29 | 2012-01-11 | 鞍钢股份有限公司 | Composite sintering method for iron-containing raw material |
| CN103779441A (en) * | 2013-11-13 | 2014-05-07 | 河南科技学院 | Cleaning recovery treatment process of solar cell sheet |
| CN104419824A (en) * | 2013-09-05 | 2015-03-18 | 鞍钢股份有限公司 | Material distribution method for producing pre-reduced sinter |
| CN104673948A (en) * | 2015-01-30 | 2015-06-03 | 中南大学 | Iron making furnace burden and mineralizing method of iron making furnace burden |
-
2007
- 2007-10-16 CN CNA2007101574573A patent/CN101126121A/en active Pending
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102312084A (en) * | 2010-06-29 | 2012-01-11 | 鞍钢股份有限公司 | Composite sintering method for iron-containing raw material |
| CN104419824A (en) * | 2013-09-05 | 2015-03-18 | 鞍钢股份有限公司 | Material distribution method for producing pre-reduced sinter |
| CN103779441A (en) * | 2013-11-13 | 2014-05-07 | 河南科技学院 | Cleaning recovery treatment process of solar cell sheet |
| CN104673948A (en) * | 2015-01-30 | 2015-06-03 | 中南大学 | Iron making furnace burden and mineralizing method of iron making furnace burden |
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