CN105648150A - Method for using bauxite slag washing process in converter steel tapping - Google Patents
Method for using bauxite slag washing process in converter steel tapping Download PDFInfo
- Publication number
- CN105648150A CN105648150A CN201610195828.6A CN201610195828A CN105648150A CN 105648150 A CN105648150 A CN 105648150A CN 201610195828 A CN201610195828 A CN 201610195828A CN 105648150 A CN105648150 A CN 105648150A
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- CN
- China
- Prior art keywords
- slag
- bauxite ore
- steel
- bauxite
- tapping
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Classifications
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- C—CHEMISTRY; METALLURGY
- C21—METALLURGY OF IRON
- C21C—PROCESSING OF PIG-IRON, e.g. REFINING, MANUFACTURE OF WROUGHT-IRON OR STEEL; TREATMENT IN MOLTEN STATE OF FERROUS ALLOYS
- C21C7/00—Treating molten ferrous alloys, e.g. steel, not covered by groups C21C1/00 - C21C5/00
- C21C7/04—Removing impurities by adding a treating agent
- C21C7/076—Use of slags or fluxes as treating agents
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- C—CHEMISTRY; METALLURGY
- C21—METALLURGY OF IRON
- C21C—PROCESSING OF PIG-IRON, e.g. REFINING, MANUFACTURE OF WROUGHT-IRON OR STEEL; TREATMENT IN MOLTEN STATE OF FERROUS ALLOYS
- C21C7/00—Treating molten ferrous alloys, e.g. steel, not covered by groups C21C1/00 - C21C5/00
- C21C7/04—Removing impurities by adding a treating agent
- C21C7/072—Treatment with gases
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P10/00—Technologies related to metal processing
- Y02P10/20—Recycling
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- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Materials Engineering (AREA)
- Metallurgy (AREA)
- Organic Chemistry (AREA)
- Carbon Steel Or Casting Steel Manufacturing (AREA)
- Treatment Of Steel In Its Molten State (AREA)
Abstract
The invention discloses a method for using bauxite slag washing process in converter steel tapping, and belongs to the technical field of the washing process of converter steel tapping. During steel tapping, the method includes opening a ladle bottom argon gas system, adding lime and bauxite ore when steel output reaches one third of the total mass, refining to remove slag, adjusting slag and deoxidizing agent according to different steel-grade component requirements, slag-removal molten steel temperature, slag conditions and others, and then heating and treating molten steel subsequently. The method has the advantages that slag making and slugging time at the former state is shortened, the integral slag making cost of the refining process is effectively reduced, and molten steel purity is improved.
Description
Technical field
The invention belongs to converter tapping deslagging process technical field, particularly to a kind of method that converter tapping uses bauxite ore deslagging process.
Background technology
More for the research of converter tapping deslagging process both at home and abroad at present, existing converter tapping deslagging process is: converter tapping, opens ladle bottom blowing argon, adds white lime with addition of a certain amount of fluorite in tapping process. It is high to there is slag system fusing point in this technique, and agglomerating caking phenomenon is serious, and restriction wash heat amount promotes, and refine slag condition of arriving at a station is poor. The problems such as whole process slagging agent consumption is high simultaneously, the seriously corroded of resistance to material, and integrated cost is high. In order to improve converter deslagging process, reduce comprehensive slag making cost, now invent a kind of new wash heat optimization method. Use the method to greatly reduce slag system fusing point, improve mobility, promote that the adsorption of field trash improves the cleanliness factor of molten steel, reduce comprehensive slag making cost.
Summary of the invention
It is an object of the invention to provide a kind of method that converter tapping uses bauxite ore deslagging process. Solve original problem that wash heat condition is poor, cost is high.
A kind of converter tapping uses the method for bauxite ore deslagging process, and concrete steps and parameter are as follows:
1) in tapping process, opening ladle bottom blowing argon system, argon flow amount controls at 600��1000NL/min;
2) when tap reaches about 1/3rd of gross mass, add white lime and bauxite ore, white lime and bauxite ore gross mass account for the 0.2��2% of tap gross mass; The mass ratio of white lime and bauxite ore is 1:0.1��10; Wherein the composition of bauxite ore is: �� Al2O3>=70wt%, SiO2�� 15wt%, bauxite ore granularity is 2��20mm, and this granularity is beneficial to fusing and strengthens wash heat effect;
3) refine is arrived at a station, and according to different steel grade composition requirements, arrive at a station liquid steel temperature, slag conditions etc., after regulating slag charge and deoxidizer, carries out heating up and follow-up steel treatment.
It is an advantage of the current invention that:
1, the slag system that wash heat is joined can be effectively improved refine and arrives at a station slag conditions, shortens early stage slag making and changes the slag time.
2, use this technology, it is possible to can substitute for other slagging agents with the bauxite ore of relative low price, effectively reduce refinery practice entirety slag making cost.
3, owing to this slag system mobility is better, slag system contains the Al of 18��28% ratios simultaneously2O3, this slag system has bigger help to improving the absorption of refine LF stove process non-metallic inclusion, is conducive to improving Molten Steel Cleanliness.
Detailed description of the invention
Embodiment 1
Steel grade Q345B low-alloy steel, the technique that refine adopts is LF refine, and tap is 100 tons.
1) in tapping process, opening ladle bottom blowing argon system, argon flow amount controls at 700NL/min.
2) when tap reaches about 1/3rd of total amount, 400kg white lime and 250kg bauxite ore are added. Wherein the composition of bauxite ore is: �� Al2O3>=75wt%, SiO2�� 15wt%.
3) refine is arrived at a station, and according to steel grade one-tenth requirement, arrive at a station liquid steel temperature, slag conditions etc., after regulating slag charge and deoxidizer, carries out heating up and follow-up steel treatment.
Embodiment 2
Steel grade X65 pipe line steel, the technique that refine adopts is LF refine, and tap is 100 tons.
1) in tapping process, opening ladle bottom blowing argon system, argon flow amount controls at 800NL/min.
2) when tap reaches about 1/3rd of total amount, 400kg white lime and 300kg bauxite ore are added. Wherein the composition of bauxite ore is: �� Al2O3>=75wt%, SiO2�� 15wt%.
3) refine is arrived at a station, and according to steel grade one-tenth requirement, arrive at a station liquid steel temperature, slag conditions etc., after regulating slag charge and deoxidizer, carries out heating up and follow-up steel treatment.
Claims (2)
1. the method that a converter tapping uses bauxite ore deslagging process, it is characterised in that concrete steps and parameter are as follows:
1) in tapping process, opening ladle bottom blowing argon system, argon flow amount controls at 600��1000NL/min;
2) when tap reaches about 1/3rd of gross mass, add white lime and bauxite ore, white lime and bauxite ore gross mass account for the 0.2��2% of tap gross mass; The mass ratio of white lime and bauxite ore is 1:0.1��10;
3) refine is arrived at a station, and according to different steel grade composition requirements, the liquid steel temperature that arrives at a station, slag conditions, after regulating slag charge and deoxidizer, carries out heating up and follow-up steel treatment.
2. method according to claim 1, it is characterised in that step 2) described in the composition of bauxite ore be: �� Al2O3>=70wt%, SiO2�� 15wt%, bauxite ore granularity is 2��20mm, and this granularity is beneficial to fusing and strengthens wash heat effect.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610195828.6A CN105648150A (en) | 2016-03-30 | 2016-03-30 | Method for using bauxite slag washing process in converter steel tapping |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610195828.6A CN105648150A (en) | 2016-03-30 | 2016-03-30 | Method for using bauxite slag washing process in converter steel tapping |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN105648150A true CN105648150A (en) | 2016-06-08 |
Family
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201610195828.6A Pending CN105648150A (en) | 2016-03-30 | 2016-03-30 | Method for using bauxite slag washing process in converter steel tapping |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN105648150A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114318113A (en) * | 2021-12-17 | 2022-04-12 | 扬州恒润海洋重工有限公司 | Slag washing direct-upward continuous casting production process of hot rolled steel converter |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| RU2413006C1 (en) * | 2009-09-17 | 2011-02-27 | Общество С Ограниченной Ответственностью "Группа "Магнезит" | Procedure for treatment of steel in casting ladle |
| CN102115805A (en) * | 2010-01-06 | 2011-07-06 | 丹东泓辉科大高温材料有限公司 | Pre-melted refining slag |
| CN103233098A (en) * | 2013-05-13 | 2013-08-07 | 涟源市飞达冶金炉料厂 | Novel direct slag-feeding washing mixed material application method in converter tapping process |
| CN104946850A (en) * | 2015-06-13 | 2015-09-30 | 秦皇岛首秦金属材料有限公司 | Converter tapping slag washing method using low-Al alumina ball |
-
2016
- 2016-03-30 CN CN201610195828.6A patent/CN105648150A/en active Pending
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| RU2413006C1 (en) * | 2009-09-17 | 2011-02-27 | Общество С Ограниченной Ответственностью "Группа "Магнезит" | Procedure for treatment of steel in casting ladle |
| CN102115805A (en) * | 2010-01-06 | 2011-07-06 | 丹东泓辉科大高温材料有限公司 | Pre-melted refining slag |
| CN103233098A (en) * | 2013-05-13 | 2013-08-07 | 涟源市飞达冶金炉料厂 | Novel direct slag-feeding washing mixed material application method in converter tapping process |
| CN104946850A (en) * | 2015-06-13 | 2015-09-30 | 秦皇岛首秦金属材料有限公司 | Converter tapping slag washing method using low-Al alumina ball |
Non-Patent Citations (1)
| Title |
|---|
| 王克玉 等: "Q195L渣洗工艺研究与优化", 《2013年低成本炼钢技术交流论坛论文集》 * |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114318113A (en) * | 2021-12-17 | 2022-04-12 | 扬州恒润海洋重工有限公司 | Slag washing direct-upward continuous casting production process of hot rolled steel converter |
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| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
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| WD01 | Invention patent application deemed withdrawn after publication |
Application publication date: 20160608 |
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| WD01 | Invention patent application deemed withdrawn after publication |