CN104195275B - A kind of big-and-middle-sized blast furnace process - Google Patents
A kind of big-and-middle-sized blast furnace process Download PDFInfo
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- CN104195275B CN104195275B CN201410457222.6A CN201410457222A CN104195275B CN 104195275 B CN104195275 B CN 104195275B CN 201410457222 A CN201410457222 A CN 201410457222A CN 104195275 B CN104195275 B CN 104195275B
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- slag
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- 238000000034 method Methods 0.000 title claims abstract description 18
- 239000000463 material Substances 0.000 claims abstract description 23
- 230000033228 biological regulation Effects 0.000 claims abstract description 4
- 239000002893 slag Substances 0.000 claims description 18
- 239000004744 fabric Substances 0.000 claims description 9
- 229910000805 Pig iron Inorganic materials 0.000 claims description 6
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 claims description 6
- 239000000571 coke Substances 0.000 claims description 6
- 239000008188 pellet Substances 0.000 claims description 6
- PWHULOQIROXLJO-UHFFFAOYSA-N Manganese Chemical compound [Mn] PWHULOQIROXLJO-UHFFFAOYSA-N 0.000 claims description 3
- WUKWITHWXAAZEY-UHFFFAOYSA-L calcium difluoride Chemical compound [F-].[F-].[Ca+2] WUKWITHWXAAZEY-UHFFFAOYSA-L 0.000 claims description 3
- 230000007423 decrease Effects 0.000 claims description 3
- 239000010436 fluorite Substances 0.000 claims description 3
- 229910052748 manganese Inorganic materials 0.000 claims description 3
- 239000011572 manganese Substances 0.000 claims description 3
- 239000002994 raw material Substances 0.000 claims description 3
- -1 rhombspar Chemical compound 0.000 claims description 3
- 239000000377 silicon dioxide Substances 0.000 claims description 3
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 abstract description 10
- 229910052742 iron Inorganic materials 0.000 abstract description 5
- 230000001105 regulatory effect Effects 0.000 abstract description 3
- 238000003723 Smelting Methods 0.000 abstract description 2
- 229910000831 Steel Inorganic materials 0.000 abstract description 2
- 239000010959 steel Substances 0.000 abstract description 2
- 230000026676 system process Effects 0.000 abstract description 2
- 239000003034 coal gas Substances 0.000 description 3
- 239000003245 coal Substances 0.000 description 2
- 239000000446 fuel Substances 0.000 description 2
- 238000002347 injection Methods 0.000 description 2
- 239000007924 injection Substances 0.000 description 2
- 241001669679 Eleotris Species 0.000 description 1
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- 230000001276 controlling effect Effects 0.000 description 1
- 238000001514 detection method Methods 0.000 description 1
- 238000009826 distribution Methods 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 239000011159 matrix material Substances 0.000 description 1
- 239000001301 oxygen Substances 0.000 description 1
- 229910052760 oxygen Inorganic materials 0.000 description 1
- 239000000843 powder Substances 0.000 description 1
- 238000004904 shortening Methods 0.000 description 1
- 230000007704 transition Effects 0.000 description 1
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- Manufacture Of Iron (AREA)
Abstract
The invention belongs to the technical field of smelting iron and steel, be specifically related to a kind of big-and-middle-sized blast furnace process.This kind big-and-middle-sized blast furnace process, comprises the following steps: the structure of (1) regulation and control blow-on material; (2) combination of blow-on material is regulated; (3) control to enter furnace charge pattern in blow-on; (4) windy mouth air supply pattern is controlled.This process of the start-up defines blow-on power core engine, greatly can optimize the system process process of big-and-middle-sized blast furnace opening, improves blow-on control, accelerates blow-on process, alleviates blow-on labor capacity, reduces blow-on consumption, improves efficiency and the benefit of blow-on.
Description
Technical field
The invention belongs to the technical field of smelting iron and steel, be specifically related to a kind of big-and-middle-sized blast furnace process.
Background technology
Big-and-middle-sized blast furnace opening is that one contains crude fuel structure design, auxiliary material structure, crude fuel tissue, blow-on material whole process enter stove pattern and detection, air port layout, pushing wind manipulation, blow-on igniting, draw coal gas, the design of the tissue that taps a blast furnace, follow-up regular burden(ing), thermal system and the systems engineering such as slagging regime control and the operation of coal powder injection oxygen enrichment.The current domestic big-and-middle-sized blast furnace opening ubiquity blow-on cycle is long, blow-on consumption is high, blow-on direct motion degree is poor, be unfavorable for the series of problems such as prolonging campaign.
Summary of the invention
The object of the invention is to for the technical problem that the current blow-on cycle is long, blow-on consumption is high, blow-on direct motion degree is poor, be unfavorable for prolonging campaign, and a kind of big-and-middle-sized blast furnace process is provided, this process of the start-up defines blow-on power core engine, greatly can optimize the system process process of big-and-middle-sized blast furnace opening, improve blow-on control, accelerate blow-on process, alleviate blow-on labor capacity, reduce blow-on consumption, improve efficiency and the benefit of blow-on.
Technical scheme of the present invention is: a kind of big-and-middle-sized blast furnace process, comprises the following steps:
(1) structure of regulation and control blow-on material: with agglomerate and pellet for main raw material structure, with silica, rhombspar, fluorite
Be auxiliary material with manganese ore; Al in blow-on initial stage control by stages slag
2o
3content; Promote temperature of the furnace hearth;
(2) combination of blow-on material is regulated: control by stages load difference gradient, basicity of slag gradient and the pig iron [Si] gradient respectively;
(3) control to enter furnace charge pattern in blow-on: control cloth angle by 15 ° ~ 38 °, cloth gear by single gear to 6 gear systems
Row model, form that blow-on stock column radial direction is uniformly distributed, longitudinal edge and in be formed centrally the cloth regular of twice air-flow;
(4) windy mouth air supply pattern is controlled: control air-supply load and successively decrease by air port area 3:2:1.
In described step (1), agglomerate is 50 ~ 70% of blow-on material gross weight; Pellet is 20 ~ 40% of blow-on material gross weight.
In described step (1) at the blow-on initial stage by Al in slag
2o
3control in 17 ~ 19% of blow-on material gross weight, then be reduced to less than 15%.
Temperature of the furnace hearth is promoted to more than 1480 DEG C in (1) by described step.
In described step (2) control overhead difference gradient by 100kg/t coke ratio to 30kg/t coke ratio.
Basicity of slag gradient is controlled by 0.05 times to 0.02 times in described step (2).
The slag forming 4.0 ~ 0.8% pig iron [Si] gradient and 1.05 ~ 1.20 in 2 ~ 3 days is controlled in described step (2)
Basicity gradient.
Controlling air supply direction in described step (4) is inverse Tie Kou direction.
In described step (4), controlled wind speed is at 220 ~ 280m/s.
Beneficial effect of the present invention is: the time that blast furnace can tap a blast furnace from lighting a fire to by big-and-middle-sized blast furnace process of the present invention shortened to 8 ~ 10 hours from 20 ~ 24 hours; Blast furnace opening draws the time shorten about 30% of coal gas; Blast furnace full blast time shorten more than 50%, within shortening to 2 ~ 4 days; Coal injection within blast furnace one week.
Embodiment
Below by embodiment, the present invention will be described in detail.
A kind of big-and-middle-sized blast furnace process, comprises the following steps:
(1) structure of regulation and control blow-on material: with agglomerate and pellet for main raw material structure, with silica, rhombspar, fluorite
Be auxiliary material with manganese ore, wherein agglomerate is 50 ~ 70% of blow-on material gross weight; Pellet be blow-on material gross weight 20 ~
40%。At the blow-on initial stage by Al in slag
2o
3control in 17 ~ 19% of blow-on material gross weight, then be reduced to less than 15%.
By temperature of the furnace hearth fast lifting, make molten iron temperature bring up to more than 1480 DEG C very soon, thus make molten iron and slag have good fluidity, make slag have good sweetening power.This step makes the formation of blow-on whole process have excellent metallurgical performance
Molten iron and slag.
(2) combination of blow-on material is regulated: regulate following blow-on material to combine sleeper, clean burnt, empty burnt and regular burden(ing); Add empty burnt and regular burden(ing) again; Add the modes such as empty Jiao and regular burden(ing) again.Control by stages load difference gradient, basicity of slag gradient and the pig iron [Si] gradient respectively; Control overhead difference gradient by 100kg/t coke ratio to 30kg/t coke ratio; Control basicity of slag gradient by 0.05 times to 0.02 times.Control the basicity of slag gradient forming 4.0 ~ 0.8% pig iron [Si] gradient and 1.05 ~ 1.20 in 2 ~ 3 days.
(3) control to enter furnace charge pattern in blow-on: control cloth angle by 15 ° ~ 38 °, cloth gear to 6 gear series models, form that blow-on stock column radial direction is uniformly distributed by single gear, longitudinal edge and in be formed centrally the cloth regular of twice air-flow; Ensure the smooth transition of subsequent production and blow-on stock column.
(4) windy mouth air supply pattern is controlled: control air supply direction for inverse Tie Kou direction; Air-supply load successively decreases by air port area 3:2:1; Wind speed is at 220 ~ 280m/s.
The real-time status such as synthetic load, slag, air port, burden distribution matrix, is formed and adds wind and draw coal gas fast, and the blow-on such as to tap a blast furnace fast comprehensively advances pattern.
Claims (1)
1. a big-and-middle-sized blast furnace process, comprises the following steps:
(1) structure of regulation and control blow-on material: with agglomerate and pellet for main raw material structure, wherein agglomerate is 50 ~ 70% of blow-on material gross weight, and pellet is 20 ~ 40% of blow-on material gross weight; With silica, rhombspar, fluorite and manganese ore for auxiliary material; Al in blow-on initial stage control by stages slag
2o
3content, at the blow-on initial stage by Al in slag
2o
3control in 17 ~ 19% of blow-on material gross weight, then be reduced to less than 15%; Promote temperature of the furnace hearth, temperature of the furnace hearth is promoted to more than 1480 DEG C;
(2) regulate the combination of blow-on material: control by stages load difference gradient, basicity of slag gradient and the pig iron [Si] gradient respectively, wherein control overhead difference gradient by 100kg/t coke ratio to 30kg/t coke ratio; Control basicity of slag gradient by 0.05 times to 0.02 times; Control the basicity of slag gradient forming 4.0 ~ 0.8% pig iron [Si] gradient and 1.05 ~ 1.20 in 2 ~ 3 days;
(3) control to enter furnace charge pattern in blow-on: control cloth angle by 15 ° ~ 38 °, cloth gear to 6 gear series models, form that blow-on stock column radial direction is uniformly distributed by single gear, longitudinal edge and in be formed centrally the cloth regular of twice air-flow;
(4) windy mouth air supply pattern is controlled: control air-supply load and successively decrease by air port area 3:2:1; Controlling air supply direction is inverse Tie Kou direction; Controlled wind speed is at 220 ~ 280m/s.
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| CN201410457222.6A CN104195275B (en) | 2014-09-10 | 2014-09-10 | A kind of big-and-middle-sized blast furnace process |
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| CN104195275B true CN104195275B (en) | 2016-03-02 |
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Families Citing this family (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111593149A (en) * | 2019-02-20 | 2020-08-28 | 新疆八一钢铁股份有限公司 | Smooth blow-in method for large blast furnace for iron making |
| CN111041139A (en) * | 2019-12-17 | 2020-04-21 | 首钢集团有限公司 | Material distribution method for blast furnace blowing-in |
| CN111914203B (en) * | 2020-04-30 | 2023-06-09 | 武钢集团昆明钢铁股份有限公司 | Calculation method of first tapping time and blast furnace opening method |
| CN111763789B (en) * | 2020-05-21 | 2021-09-17 | 南京钢铁股份有限公司 | Method for preparing filling material for blowing in blast furnace full coke |
| CN114134263B (en) * | 2021-11-25 | 2023-02-17 | 德龙钢铁有限公司 | Rapid blow-in method |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1151439A (en) * | 1995-11-30 | 1997-06-11 | 承德钢铁公司 | Method of blowing-in furnace for smelting whole sefstromite using sefstromite blast furnace |
| CN101671751A (en) * | 2009-10-14 | 2010-03-17 | 首钢总公司 | Quantification blow-in method for blast furnace |
| CN101713005A (en) * | 2009-12-30 | 2010-05-26 | 安阳钢铁股份有限公司 | Method for blowing-in operation of steel-making blast furnace |
| CN102337360A (en) * | 2011-09-13 | 2012-02-01 | 攀钢集团攀枝花钢钒有限公司 | Blow-in method for blast furnace to smelt high-titanium type vanadium titano-magnetite |
| CN102888474A (en) * | 2012-09-26 | 2013-01-23 | 武汉钢铁(集团)公司 | Method for controlling aluminum oxide in first furnace blow-in slag of blast furnace |
-
2014
- 2014-09-10 CN CN201410457222.6A patent/CN104195275B/en active Active
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1151439A (en) * | 1995-11-30 | 1997-06-11 | 承德钢铁公司 | Method of blowing-in furnace for smelting whole sefstromite using sefstromite blast furnace |
| CN101671751A (en) * | 2009-10-14 | 2010-03-17 | 首钢总公司 | Quantification blow-in method for blast furnace |
| CN101713005A (en) * | 2009-12-30 | 2010-05-26 | 安阳钢铁股份有限公司 | Method for blowing-in operation of steel-making blast furnace |
| CN102337360A (en) * | 2011-09-13 | 2012-02-01 | 攀钢集团攀枝花钢钒有限公司 | Blow-in method for blast furnace to smelt high-titanium type vanadium titano-magnetite |
| CN102888474A (en) * | 2012-09-26 | 2013-01-23 | 武汉钢铁(集团)公司 | Method for controlling aluminum oxide in first furnace blow-in slag of blast furnace |
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| 本钢新1号4747m_3高炉开炉达产实践;王凤民 等;《金属世界》;20091231(第6期);1-5 * |
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Address after: West Industrial Park 256209 Shandong province Binzhou city Zouping County Patentee after: XIWANG SPECIAL STEEL Co.,Ltd. Address before: West Industrial Park 256209 Shandong province Binzhou city Zouping County Patentee before: SHANDONG XIWANG SPECIAL STEEL Co.,Ltd. |
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Inventor after: Wang Tao Inventor after: Wang Jialin Inventor after: Wang Hui Inventor after: Jiang Changlin Inventor after: Wang Dong Inventor after: Li Wenshuang Inventor after: Gao Panfeng Inventor after: Zhang Meng Inventor before: Zhao Xiaoming Inventor before: Wang Hui Inventor before: Jiang Changlin Inventor before: Wang Dong |
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Effective date of registration: 20170707 Address after: 256209 Shandong city of Binzhou province Zouping County Han Wang Zhen West Industrial Park Patentee after: XIWANG METAL TECHNOLOGY Co.,Ltd. Address before: West Industrial Park 256209 Shandong province Binzhou city Zouping County Patentee before: XIWANG SPECIAL STEEL Co.,Ltd. |
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Denomination of invention: A blowing in process of large and medium-sized blast furnace Effective date of registration: 20211227 Granted publication date: 20160302 Pledgee: Xiwang Group Finance Co.,Ltd. Pledgor: XIWANG METAL TECHNOLOGY Co.,Ltd. Registration number: Y2021980016144 |
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Date of cancellation: 20220711 Granted publication date: 20160302 Pledgee: Xiwang Group Finance Co.,Ltd. Pledgor: XIWANG METAL TECHNOLOGY Co.,Ltd. Registration number: Y2021980016144 |