JPS57149409A - Refining by top and bottom blowing converter - Google Patents

Refining by top and bottom blowing converter

Info

Publication number
JPS57149409A
JPS57149409A JP3354981A JP3354981A JPS57149409A JP S57149409 A JPS57149409 A JP S57149409A JP 3354981 A JP3354981 A JP 3354981A JP 3354981 A JP3354981 A JP 3354981A JP S57149409 A JPS57149409 A JP S57149409A
Authority
JP
Japan
Prior art keywords
converter
tuyere
refining
steel
converter bottom
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
JP3354981A
Other languages
Japanese (ja)
Other versions
JPS635448B2 (en
Inventor
Yutaka Kino
Michitaka Kanemoto
Yutaka Narita
Yoshihiro Hatsuta
Junichi Sakane
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.)
Nippon Steel Corp
Original Assignee
Nippon Steel Corp
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 Nippon Steel Corp filed Critical Nippon Steel Corp
Priority to JP3354981A priority Critical patent/JPS57149409A/en
Publication of JPS57149409A publication Critical patent/JPS57149409A/en
Publication of JPS635448B2 publication Critical patent/JPS635448B2/ja
Granted 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 smoothly advance the making and refining of steel by properly retaining a mushroom above the tuyere of converter bottom by mixing oxygen in CO2 from the tuyere of the converter bottom as needed in a steel-making converter in which oxygen is blown into the top lance and CO2 is blown into the tuyere of converter bottom. CONSTITUTION:Pure oxygen is blown onto molten pig iron 27 inside a converter 26 from the upper lance 25, and also CO2 gas is blown onto the converter 26 from the tuyere 2a of the converter bottom. While stirring molten steel 27, the molten steel is refined with excellent refining speed. In this case, the converter bottom tuyere 2a is made up of a concentric double pipe consisting of an outer pipe 7 and an inner pipe 8, each of which is connected to CO2-supply pipes 70 and 80. An oxygen-supply pipe 14 is connected to the CO2-supply pipe 80. In case where semicoagulated mushroom is formed in molten steel above the converter bottom tuyere 2a and blocks the CO2-passing hole 6, O2 from the O2 supply pipe 14 is mixed in CO2 in the inner pipe 8 to keep the CO2-passing hole 6 open, and thereby gas is properly stirred by CO2 to advance smoothly the refining of steel.
JP3354981A 1981-03-09 1981-03-09 Refining by top and bottom blowing converter Granted JPS57149409A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP3354981A JPS57149409A (en) 1981-03-09 1981-03-09 Refining by top and bottom blowing converter

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP3354981A JPS57149409A (en) 1981-03-09 1981-03-09 Refining by top and bottom blowing converter

Publications (2)

Publication Number Publication Date
JPS57149409A true JPS57149409A (en) 1982-09-16
JPS635448B2 JPS635448B2 (en) 1988-02-03

Family

ID=12389631

Family Applications (1)

Application Number Title Priority Date Filing Date
JP3354981A Granted JPS57149409A (en) 1981-03-09 1981-03-09 Refining by top and bottom blowing converter

Country Status (1)

Country Link
JP (1) JPS57149409A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
TWI630276B (en) * 2016-09-02 2018-07-21 中國鋼鐵股份有限公司 Method for controlling status of accretion formation in pyrometallurgical treatment

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH02140346U (en) * 1989-04-20 1990-11-22

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS55161014A (en) * 1979-05-31 1980-12-15 Sumitomo Metal Ind Ltd Refining method for steel
JPS5613423A (en) * 1979-07-06 1981-02-09 Sumitomo Metal Ind Ltd Refining method for steel

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS55161014A (en) * 1979-05-31 1980-12-15 Sumitomo Metal Ind Ltd Refining method for steel
JPS5613423A (en) * 1979-07-06 1981-02-09 Sumitomo Metal Ind Ltd Refining method for steel

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
TWI630276B (en) * 2016-09-02 2018-07-21 中國鋼鐵股份有限公司 Method for controlling status of accretion formation in pyrometallurgical treatment

Also Published As

Publication number Publication date
JPS635448B2 (en) 1988-02-03

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