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JPS6468415A - Production of molten stainless steel by smelting reduction - Google Patents

Production of molten stainless steel by smelting reduction

Info

Publication number
JPS6468415A
JPS6468415A JP22525587A JP22525587A JPS6468415A JP S6468415 A JPS6468415 A JP S6468415A JP 22525587 A JP22525587 A JP 22525587A JP 22525587 A JP22525587 A JP 22525587A JP S6468415 A JPS6468415 A JP S6468415A
Authority
JP
Japan
Prior art keywords
blowing
blown
decarburization
inert gas
time
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
Application number
JP22525587A
Other languages
Japanese (ja)
Other versions
JP2556052B2 (en
Inventor
Haruyoshi Tanabe
Masahiro Kawakami
Kenji Takahashi
Katsuhiro Iwasaki
Shigeru Inoue
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
JFE Engineering Corp
Original Assignee
NKK Corp
Nippon Kokan Ltd
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Priority to JP62225255A priority Critical patent/JP2556052B2/en
Application filed by NKK Corp, Nippon Kokan Ltd filed Critical NKK Corp
Priority to DE3850394T priority patent/DE3850394T2/en
Priority to AT88907783T priority patent/ATE107706T1/en
Priority to AU23057/88A priority patent/AU604974B2/en
Priority to BR888807201A priority patent/BR8807201A/en
Priority to US07/362,418 priority patent/US4944799A/en
Priority to EP88907783A priority patent/EP0355163B1/en
Priority to PCT/JP1988/000910 priority patent/WO1989002478A1/en
Publication of JPS6468415A publication Critical patent/JPS6468415A/en
Application granted granted Critical
Publication of JP2556052B2 publication Critical patent/JP2556052B2/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

Links

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  • Manufacture Of Iron (AREA)
  • Carbon Steel Or Casting Steel Manufacturing (AREA)

Abstract

PURPOSE:To efficiently produce a molten stainless steel in a shot period of time by respectively specifying gas blowing and executing a reduction treatment and decarburization treatment at the time of executing decarburization blowing by reducing a Cr raw material by a C source. CONSTITUTION:Co or/and inert gas is blown from a bottom blowing tuyere during the smelting reduction period at the time of executing the decarburization blowing by reducing Cr ore by a carbonaceous material. The Co or inert gas is also blown from a side blowing tuyere 2 in such a manner that at least a part of the gas flow collides against the build-up molten metal part by the bottom blowing gas. O2 for decarburization is blown from a top blowing lance 3 into the molten metal and O2 for secondary combustion is blown into slag. The secondary combustion ratio is maintained at >=0.3 at this time. The slag is discharged after the end of the reduction treatment. O2 for decarburization diluted with the inert gas is then top blown from the top blowing lance 3 to the high-Cr molten iron formed in such a manner and the inert gas is blown thereto from the bottom blowing tuyere 2 to strongly stir the molten iron, by which the decarburization blowing is executed. The molten stainless steel is thereby produced at high productivity and low cost.
JP62225255A 1987-09-10 1987-09-10 Method for producing molten stainless steel by smelting reduction Expired - Lifetime JP2556052B2 (en)

Priority Applications (8)

Application Number Priority Date Filing Date Title
JP62225255A JP2556052B2 (en) 1987-09-10 1987-09-10 Method for producing molten stainless steel by smelting reduction
AT88907783T ATE107706T1 (en) 1987-09-10 1988-09-09 METHOD OF MAKING MOLTEN STAINLESS STEEL.
AU23057/88A AU604974B2 (en) 1987-09-10 1988-09-09 Process for producing molten stainless steel
BR888807201A BR8807201A (en) 1987-09-10 1988-09-09 METHOD OF PRODUCTION OF STAINLESS STEEL IN REDUCING FUSION FUSION
DE3850394T DE3850394T2 (en) 1987-09-10 1988-09-09 METHOD FOR PRODUCING MELTED STAINLESS STEEL.
US07/362,418 US4944799A (en) 1987-09-10 1988-09-09 Method of producing stainless molten steel by smelting reduction
EP88907783A EP0355163B1 (en) 1987-09-10 1988-09-09 Process for producing molten stainless steel
PCT/JP1988/000910 WO1989002478A1 (en) 1987-09-10 1988-09-09 Process for producing molten stainless steel

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP62225255A JP2556052B2 (en) 1987-09-10 1987-09-10 Method for producing molten stainless steel by smelting reduction

Publications (2)

Publication Number Publication Date
JPS6468415A true JPS6468415A (en) 1989-03-14
JP2556052B2 JP2556052B2 (en) 1996-11-20

Family

ID=16826444

Family Applications (1)

Application Number Title Priority Date Filing Date
JP62225255A Expired - Lifetime JP2556052B2 (en) 1987-09-10 1987-09-10 Method for producing molten stainless steel by smelting reduction

Country Status (1)

Country Link
JP (1) JP2556052B2 (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH01246309A (en) * 1988-03-28 1989-10-02 Kawasaki Steel Corp Method for melting high alloy steel
US5246482A (en) * 1990-06-29 1993-09-21 Kawasaki Jukogyo Kabushiki Kaisha Molten metal producing and refining method

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR101356898B1 (en) * 2012-06-26 2014-01-28 주식회사 포스코 Hot metal decarburization method for stainless steel

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH01246309A (en) * 1988-03-28 1989-10-02 Kawasaki Steel Corp Method for melting high alloy steel
US5246482A (en) * 1990-06-29 1993-09-21 Kawasaki Jukogyo Kabushiki Kaisha Molten metal producing and refining method

Also Published As

Publication number Publication date
JP2556052B2 (en) 1996-11-20

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