JPS6479316A - Method for refining low p, s molten steel - Google Patents
Method for refining low p, s molten steelInfo
- Publication number
- JPS6479316A JPS6479316A JP23604387A JP23604387A JPS6479316A JP S6479316 A JPS6479316 A JP S6479316A JP 23604387 A JP23604387 A JP 23604387A JP 23604387 A JP23604387 A JP 23604387A JP S6479316 A JPS6479316 A JP S6479316A
- Authority
- JP
- Japan
- Prior art keywords
- molten steel
- temp
- ladle
- reaction
- converter
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
Classifications
-
- 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
Landscapes
- Treatment Of Steel In Its Molten State (AREA)
Abstract
PURPOSE:To efficiently refine a low P, S molten steel in a short period of time by adding Al through an immersion pipe to the in-ladle molten steel of an adequate temp. tapped after converter refining is blown out at a cryogenic temp. and subjecting this molten steel to oxygen blowing and heating up, then to desulfurization. CONSTITUTION:High P and S raw materials contg. low-grade steel scrap, etc., are charged into a converter and a slag forming material such as lime is added thereto, then oxygen blowing is executed. This converter refining is blown out at the cryogenic temp. to accelerate the dephosphorization reaction. The molten steel subjected to the dephosphorization is tapped from the converter into the ladle and the temp. of the molten steel in the ladle is set higher by 10-40 deg.C than the liquid phase temp. (LL) of the molten steel. The immersion pipe is then inserted into the in-ladle molten steel. Oxygen is blown to the molten steel from a lance while metal or alloy of Al is added thereto through this immersion pipe. The reaction to form Al2O3 is thereby efficiency effected and the molten steel is heated up in a short period of time by the reaction heat thereof. A flux contg. a desulfurizing agent such as quicklime is added to this molten steel and an inert gas is blown thereto to stir the molten steel. The desulfurization reaction is efficiently accelerated by the above-mentioned Al2O3 and the smelting of the low P, S molten steel is executed.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP23604387A JPS6479316A (en) | 1987-09-19 | 1987-09-19 | Method for refining low p, s molten steel |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP23604387A JPS6479316A (en) | 1987-09-19 | 1987-09-19 | Method for refining low p, s molten steel |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS6479316A true JPS6479316A (en) | 1989-03-24 |
| JPH0341525B2 JPH0341525B2 (en) | 1991-06-24 |
Family
ID=16994913
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP23604387A Granted JPS6479316A (en) | 1987-09-19 | 1987-09-19 | Method for refining low p, s molten steel |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS6479316A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR100973651B1 (en) * | 2003-07-16 | 2010-08-02 | 주식회사 포스코 | Process for excluding phosphate of ingot steel |
| CN112126737A (en) * | 2019-06-24 | 2020-12-25 | 上海梅山钢铁股份有限公司 | Production method of low-sulfur alloy molten steel |
-
1987
- 1987-09-19 JP JP23604387A patent/JPS6479316A/en active Granted
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR100973651B1 (en) * | 2003-07-16 | 2010-08-02 | 주식회사 포스코 | Process for excluding phosphate of ingot steel |
| CN112126737A (en) * | 2019-06-24 | 2020-12-25 | 上海梅山钢铁股份有限公司 | Production method of low-sulfur alloy molten steel |
| CN112126737B (en) * | 2019-06-24 | 2022-04-15 | 上海梅山钢铁股份有限公司 | Production method of low-sulfur alloy molten steel |
Also Published As
| Publication number | Publication date |
|---|---|
| JPH0341525B2 (en) | 1991-06-24 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| LAPS | Cancellation because of no payment of annual fees |