JPS5763616A - Manufacture of ultralow-carbon steel - Google Patents

Manufacture of ultralow-carbon steel

Info

Publication number
JPS5763616A
JPS5763616A JP13873180A JP13873180A JPS5763616A JP S5763616 A JPS5763616 A JP S5763616A JP 13873180 A JP13873180 A JP 13873180A JP 13873180 A JP13873180 A JP 13873180A JP S5763616 A JPS5763616 A JP S5763616A
Authority
JP
Japan
Prior art keywords
top blowing
tuyeres
ultralow
manufacture
oxygen
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.)
Pending
Application number
JP13873180A
Other languages
Japanese (ja)
Inventor
Akiya Ozeki
Teruyuki Hasegawa
Youichi Nimura
Kenzo Yamada
Tsutomu Usui
Kounoshin Tamura
Toshio Edane
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
Application filed by NKK Corp, Nippon Kokan Ltd filed Critical NKK Corp
Priority to JP13873180A priority Critical patent/JPS5763616A/en
Publication of JPS5763616A publication Critical patent/JPS5763616A/en
Pending legal-status Critical Current

Links

Classifications

    • 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
    • C21C5/00—Manufacture of carbon-steel, e.g. plain mild steel, medium carbon steel or cast steel or stainless steel
    • C21C5/28—Manufacture of steel in the converter
    • C21C5/30—Regulating or controlling the blowing
    • C21C5/35—Blowing from above and through the bath

Landscapes

  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Manufacturing & Machinery (AREA)
  • Materials Engineering (AREA)
  • Metallurgy (AREA)
  • Organic Chemistry (AREA)

Abstract

PURPOSE:To manufacture an ultralow-carbon steel having <=0.003% C content by attaching a plurality of tuyeres to the bottom of a top blowing oxygen converter, blowing one or >=2 kinds of gases selected from an inert gas, O2 and CO2 simultaneously with the top blowing of oxygen to adjust the C concn. of molten steel to a specified value or below, and carrying out degassing. CONSTITUTION:A plurality of tuyeres are attached to the bottom of a top blowing oxygen converter, and one or >=2 kinds of gases selected from an inert gas, O2 and CO2 are blown into molten steel from the tuyeres simultaneously with the top blowing of oxygen to refine a steel contg. <=0.015%C. The total amount of the gases blown from the bottom is about 0.01-0.3Nm<3>/min/t. The resulting low-carbon molten steel is degassed.
JP13873180A 1980-10-06 1980-10-06 Manufacture of ultralow-carbon steel Pending JPS5763616A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP13873180A JPS5763616A (en) 1980-10-06 1980-10-06 Manufacture of ultralow-carbon steel

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP13873180A JPS5763616A (en) 1980-10-06 1980-10-06 Manufacture of ultralow-carbon steel

Publications (1)

Publication Number Publication Date
JPS5763616A true JPS5763616A (en) 1982-04-17

Family

ID=15228837

Family Applications (1)

Application Number Title Priority Date Filing Date
JP13873180A Pending JPS5763616A (en) 1980-10-06 1980-10-06 Manufacture of ultralow-carbon steel

Country Status (1)

Country Link
JP (1) JPS5763616A (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS58207311A (en) * 1982-05-27 1983-12-02 Nippon Kokan Kk <Nkk> Converter steel making method
JP2009270136A (en) * 2008-05-01 2009-11-19 Kobe Steel Ltd Converter-blowing method for ultra-low carbon steel using general pig iron

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS52146711A (en) * 1976-06-01 1977-12-06 Nippon Steel Corp Operation of converter
JPS5591908A (en) * 1978-12-30 1980-07-11 Nippon Steel Corp Decarburizing method for molten cast iron

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS52146711A (en) * 1976-06-01 1977-12-06 Nippon Steel Corp Operation of converter
JPS5591908A (en) * 1978-12-30 1980-07-11 Nippon Steel Corp Decarburizing method for molten cast iron

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS58207311A (en) * 1982-05-27 1983-12-02 Nippon Kokan Kk <Nkk> Converter steel making method
JP2009270136A (en) * 2008-05-01 2009-11-19 Kobe Steel Ltd Converter-blowing method for ultra-low carbon steel using general pig iron

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