JPS55125221A - Production of low-carbon stainless steel by plasma arc melting - Google Patents
Production of low-carbon stainless steel by plasma arc meltingInfo
- Publication number
- JPS55125221A JPS55125221A JP3336279A JP3336279A JPS55125221A JP S55125221 A JPS55125221 A JP S55125221A JP 3336279 A JP3336279 A JP 3336279A JP 3336279 A JP3336279 A JP 3336279A JP S55125221 A JPS55125221 A JP S55125221A
- Authority
- JP
- Japan
- Prior art keywords
- gas
- plasma
- plasma arc
- stainless steel
- partial pressure
- 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)
- Furnace Details (AREA)
Abstract
PURPOSE: To remove and refine C, N and other impurites while reducing the consumption of plasma torch electrode by decreasing stepwise the oxygen partial pressure in inert gas as plasma working gas at the time of refining low-carbon stainless steel by a plasma arc melting method.
CONSTITUTION: Steel scrap, return scrap, Fe-Cr, Fe-Ni are charged into the crucible 7 in the plasma arc furnace and a furnace cover 8 is put on. After Ar gas is fed into a melting chamber 12 from an Ar gas cylinder 18, the charged raw material is melted by supplying current to an induction coil 9. The molten slag formed at this time is removed, after which CaO-Al2O3-base flux is charged from a storage tank 15 and while the mixed gases of O2 partial pressure 0.5atm are being flowed by Ar gas and the O2 gas from a cylinder 22, plasma arc is formed between a plasma torck 16 and molten metal M, whereby the molten metal is heated and its impurities such as C, N, Pb, Sn and Zn are oxidation-removed. The slag is renewed and the oxygen partial pressure is decreased along with the progression of the refining, whereby the refining is repeated and the high-quality stainless steel is provided without oxidizing Cr and consuming the plasma torch 16.
COPYRIGHT: (C)1980,JPO&Japio
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP3336279A JPS55125221A (en) | 1979-03-23 | 1979-03-23 | Production of low-carbon stainless steel by plasma arc melting |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP3336279A JPS55125221A (en) | 1979-03-23 | 1979-03-23 | Production of low-carbon stainless steel by plasma arc melting |
Publications (2)
Publication Number | Publication Date |
---|---|
JPS55125221A true JPS55125221A (en) | 1980-09-26 |
JPS5733324B2 JPS5733324B2 (en) | 1982-07-16 |
Family
ID=12384466
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP3336279A Granted JPS55125221A (en) | 1979-03-23 | 1979-03-23 | Production of low-carbon stainless steel by plasma arc melting |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPS55125221A (en) |
Cited By (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS6013014A (en) * | 1983-06-30 | 1985-01-23 | Ishikawajima Harima Heavy Ind Co Ltd | Ladle refining device |
FR2796517A1 (en) * | 1999-07-12 | 2001-01-19 | Air Liquide | Method for reducing nitrogen oxides (NOx) emitted by plasma torch operating in air, has air supply partially replaced by a mixture with reduced oxygen content |
KR101188326B1 (en) | 2010-11-05 | 2012-10-09 | 주식회사 포스코 | Method of molten metal refining |
CN114959423A (en) * | 2022-06-07 | 2022-08-30 | 甘肃酒钢集团宏兴钢铁股份有限公司 | Smelting method of high-silicon titanium-containing austenitic stainless steel |
-
1979
- 1979-03-23 JP JP3336279A patent/JPS55125221A/en active Granted
Cited By (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS6013014A (en) * | 1983-06-30 | 1985-01-23 | Ishikawajima Harima Heavy Ind Co Ltd | Ladle refining device |
FR2796517A1 (en) * | 1999-07-12 | 2001-01-19 | Air Liquide | Method for reducing nitrogen oxides (NOx) emitted by plasma torch operating in air, has air supply partially replaced by a mixture with reduced oxygen content |
KR101188326B1 (en) | 2010-11-05 | 2012-10-09 | 주식회사 포스코 | Method of molten metal refining |
CN114959423A (en) * | 2022-06-07 | 2022-08-30 | 甘肃酒钢集团宏兴钢铁股份有限公司 | Smelting method of high-silicon titanium-containing austenitic stainless steel |
CN114959423B (en) * | 2022-06-07 | 2023-04-14 | 甘肃酒钢集团宏兴钢铁股份有限公司 | Smelting method of high-silicon titanium-containing austenitic stainless steel |
Also Published As
Publication number | Publication date |
---|---|
JPS5733324B2 (en) | 1982-07-16 |
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