CN106702048B - Method for improving coal and reducing coke of blast furnace - Google Patents
Method for improving coal and reducing coke of blast furnace Download PDFInfo
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- CN106702048B CN106702048B CN201510791166.4A CN201510791166A CN106702048B CN 106702048 B CN106702048 B CN 106702048B CN 201510791166 A CN201510791166 A CN 201510791166A CN 106702048 B CN106702048 B CN 106702048B
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- blast furnace
- coke
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- blast
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- 239000000571 coke Substances 0.000 title claims abstract description 26
- 238000000034 method Methods 0.000 title claims abstract description 11
- 239000003245 coal Substances 0.000 title abstract description 10
- 239000000843 powder Substances 0.000 claims abstract description 18
- 238000005453 pelletization Methods 0.000 claims abstract description 8
- 238000009826 distribution Methods 0.000 claims abstract description 7
- 239000011159 matrix material Substances 0.000 claims abstract description 7
- 239000000463 material Substances 0.000 claims abstract description 4
- 239000011280 coal tar Substances 0.000 claims description 9
- 239000004744 fabric Substances 0.000 claims description 8
- 238000002347 injection Methods 0.000 claims description 4
- 239000007924 injection Substances 0.000 claims description 4
- 239000002817 coal dust Substances 0.000 claims description 3
- 230000000295 complement effect Effects 0.000 claims description 3
- 230000006855 networking Effects 0.000 claims description 3
- 238000003723 Smelting Methods 0.000 abstract description 3
- 239000004484 Briquette Substances 0.000 abstract 2
- 238000007599 discharging Methods 0.000 abstract 1
- 239000004615 ingredient Substances 0.000 abstract 1
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 6
- 238000005516 engineering process Methods 0.000 description 5
- 229910000831 Steel Inorganic materials 0.000 description 4
- 239000010959 steel Substances 0.000 description 4
- 229910052742 iron Inorganic materials 0.000 description 3
- 238000007664 blowing Methods 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 229910000805 Pig iron Inorganic materials 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 230000035699 permeability Effects 0.000 description 1
- 238000005245 sintering Methods 0.000 description 1
- 239000000243 solution Substances 0.000 description 1
Landscapes
- Manufacture Of Iron (AREA)
Abstract
The invention provides a method for improving coal and reducing coke of a blast furnace, which interconnects powder preparation systems and powder conveying systems; changing the disk pelletizing into large mixer pelletizing, and introducing the return ores of the blast furnace into ingredients; reducing the area of a blast furnace tuyere, and uniformly moving a distribution matrix to an inner ring for 1.9-2.1 degrees; the central coke adding amount is changed from 4 circles to 5.5 circles, and the central coke adding amount is gradually adjusted back to 4 circles after 5-10 days; controlling the temperature of a 2580m3 blast furnace throat at 120-180 ℃ and the temperature of a 3200m3 blast furnace throat at 40-80 ℃; the coke briquette discharging material is placed at the middle and rear sections of the ore batch, and the coke briquette ratio is increased to 63-66 kg/t. The invention can reduce the coke ratio by 15kg/t and improve the coal ratio by 19.815kg/t, thereby greatly reducing the smelting cost of the blast furnace and improving the market competitiveness of enterprises.
Description
Technical field
The invention belongs to ironmaking technology field, more particularly to method that coal tar reduction is proposed in a kind of blast furnace ironmaking process.
Background technology
Carrying out proposing coal tar reduction on blast furnace and carrying high-coal ratio reduces the exploitation of coke ratio technology, to improving blast furnace economic technology
Index and alleviation coke supply pressure are of great practical significance.Therefore for many years, one straight grip blast furnace of Anshan iron and steel plant puies forward coal drop
Coke, which carries high-coal ratio, reduces the coke ratio strategic objective important as one, especially competes fiercer, form in iron and steel enterprise
Propose coal tar reduction increasingly serious today, reduction pig iron smelting cost has become urgently to be solved concerning one of the living or death of ironmaking enterprise
Certainly the problem of.Due to defect of the long-established enterprise in equipment and production technology, the widespread adoption for proposing coal tar reduction is made greatly to be limited
System causes the coke ratio index of Anshan iron and steel plant to be not up to top level always in national major steel mill's ranking, therefore finds out a set of row
The effective method for proposing coal tar reduction is imperative.
Invention content
The present invention provides a kind of method that blast furnace proposes coal tar reduction, and purpose is intended to increase coal ejection ratio, reduces coke ratio, improves coal
Close-burning structure reduces blast furnace process cost.
For this purpose, this invention takes following technical solutions：
A kind of method that blast furnace proposes coal tar reduction, specific method are：
(1) each powder unit processed is linked into each cloth bag case of connection by powder processed, the powder system interconnection by pipeline and valve
Cloth bag manifold on, realize powder pipeline processed networking；Mutual union and valve are added, the injection pipeline for connecting each injecting tank of blast furnace is led to
Cross mutual union it is parallel with one another with valve together with, realize that coal dust is complementary；
(2) ball disk pelletizing is changed to large-scale mixer pelletizing, and BF return fines is introduced into dispensing, returning mine accounts for material rate and be
8~12%, granularity < 6mm；
(3) blast-furnace tuyere area is reduced, blast-furnace tuyere area is reduced into 0.3150m2；
(4) burden distribution matrix is adjusted, burden distribution matrix unification is moved 1.9 °~2.1 ° to inner ring；
(5) edge airflow is controlled, central coke amount is become into 5.5 circles from 4 circles, gradually pulls back to 4 circles after 5~10 days again；
(6) furnace throat temperature is adjusted, the control of 2580m3 blast furnace throat temperature is at 120~180 DEG C, 3200m3 blast furnace throat temperature
Control is at 40~80 DEG C；
(7) nut coke discharge position is placed on to the posterior segment of mine batch；
(8) increase nut coke amount, nut coke ratio is increased into 63~66kg/t.
Beneficial effects of the present invention are：
The present invention can make coke ratio reduce 15kg/t, and coal is than improving 19.815kg/t, to greatly reduce the smelting of blast furnace
Cost improves the market competitiveness of enterprise.
Description of the drawings
Fig. 1 is powder processed, the powder system pipeline interconnection architecture schematic diagram；
Fig. 2 is each blast furnace blowing pipeline interconnection architecture schematic diagram.
In figure：Cloth bag case 1, cloth bag manifold 2, subtube I 3, subtube II 4, mutual union 5, valve 6, injecting tank of blast furnace group I
7, injecting tank of blast furnace group II 8.
Specific implementation mode
By taking certain large-scale iron-smelter as an example, the invention will be further described.
1, powder processed, the powder system interconnection.According to each unbalanced problem of powder unit capability processed, each powder unit processed is led to
It crosses subtube I 3, subtube II 4 and valve to be linked on the cloth bag manifold 2 for connecting each cloth bag case 1, realizes powder pipeline networking processed,
It is owed with surplus mend.Mutual union 5 and valve 6 are added, is each blast furnace blowing by connection injecting tank of blast furnace group I 7, injecting tank of blast furnace group II 8
The injection pipeline of tank by mutual union 5 it is parallel with one another with valve 6 together with, discharge coal powder injection ability, realize that coal dust is complementary.
2, ball disk pelletizing is changed to large-scale mixer pelletizing, and BF return fines is introduced into dispensing, returning mine accounts for material rate and be
10%, granularity < 6mm.Two burn, three burn, comprehensive stock ground input is burnt in west, and subsidiary factory stock ground is perfect, and sintering index, which is obviously stablized, to be promoted,
High furnace group stable smooth operation.
3, blast-furnace tuyere area is reduced, by blast-furnace tuyere area by original 0.366m2It is reduced into 0.315m2。
4, burden distribution matrix is adjusted, burden distribution matrix unification is moved 2 ° to inner ring.
5, edge airflow is controlled, central coke amount is become into 5.5 circles from 4 circles, gradually pulls back to 4 circles after 7 days again.
6, furnace throat temperature is adjusted, at 150 DEG C, the control of 3200m3 blast furnace throat temperature exists the control of 2580m3 blast furnace throat temperature
60℃。
7, nut coke discharge position is uniformly placed on to the posterior segment of mine batch, ensure the direct motion of blast furnace.
8, increase nut coke amount, by nut coke than increasing to 65kg/t by original 50kg/t, to increase sinter bed in stove
Gas permeability.
Claims (1)
1. a kind of method that blast furnace proposes coal tar reduction, it is characterised in that：
(1) each powder unit processed is linked into the cloth for connecting each cloth bag case by powder processed, the powder system interconnection by pipeline and valve
On bag manifold, powder pipeline networking processed is realized；Mutual union and valve are added, the injection pipeline for connecting each injecting tank of blast furnace is passed through mutual
Together with union is parallel with one another with valve, realize that coal dust is complementary；
(2) ball disk pelletizing is changed to large-scale mixer pelletizing, BF return fines is introduced into dispensing, return mine account for material rate be 8~
12%, granularity < 6mm；
(3) blast-furnace tuyere area is reduced, blast-furnace tuyere area is reduced into 0.3150m2；
(4) burden distribution matrix is adjusted, burden distribution matrix unification is moved 1.9 °~2.1 ° to inner ring；
(5) edge airflow is controlled, central coke amount is become into 5.5 circles from 4 circles, gradually pulls back to 4 circles after 5~10 days again；
(6) furnace throat temperature is adjusted, at 120~180 DEG C, 3200m3 blast furnace throat temperature controls the control of 2580m3 blast furnace throat temperature
At 40~80 DEG C；
(7) nut coke discharge position is placed on to the posterior segment of mine batch；
(8) increase nut coke amount, nut coke ratio is increased into 63~66kg/t.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510791166.4A CN106702048B (en) | 2015-11-17 | 2015-11-17 | Method for improving coal and reducing coke of blast furnace |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510791166.4A CN106702048B (en) | 2015-11-17 | 2015-11-17 | Method for improving coal and reducing coke of blast furnace |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN106702048A CN106702048A (en) | 2017-05-24 |
| CN106702048B true CN106702048B (en) | 2018-10-26 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201510791166.4A Active CN106702048B (en) | 2015-11-17 | 2015-11-17 | Method for improving coal and reducing coke of blast furnace |
Country Status (1)
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| CN (1) | CN106702048B (en) |
Family Cites Families (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101812556B (en) * | 2010-04-15 | 2011-07-20 | 南京钢铁股份有限公司 | Method for increasing blast furnace output and reducing blast furnace coke ratio by enhancing qualification rate of SiO2 in blending stack |
| CN102719581B (en) * | 2011-03-29 | 2014-11-05 | 鞍钢股份有限公司 | Blast furnace tapping method for reducing molten iron circulation in hearth |
| CN103589818A (en) * | 2012-08-14 | 2014-02-19 | 攀钢集团研究院有限公司 | Blast furnace coal spraying tube, and method for reducing coke rate of blast furnace |
| CN102936633A (en) * | 2012-10-15 | 2013-02-20 | 中冶南方工程技术有限公司 | Blast furnace coal injection method adopting coke oven coal gas as coal injection conveying carrier |
| CN103820590B (en) * | 2014-02-11 | 2016-06-01 | 东北大学 | The blast-furnace smelting method for vanadium titano-magnetite of a kind of ore-coke mixed charging |
| CN104962674A (en) * | 2015-07-09 | 2015-10-07 | 山西太钢不锈钢股份有限公司 | Method for lowering furnace hearth temperature by lowering coke strength and increasing coke ratio |
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| CN106702048A (en) | 2017-05-24 |
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