JPS5613423A - Refining method for steel - Google Patents

Refining method for steel

Info

Publication number
JPS5613423A
JPS5613423A JP8612579A JP8612579A JPS5613423A JP S5613423 A JPS5613423 A JP S5613423A JP 8612579 A JP8612579 A JP 8612579A JP 8612579 A JP8612579 A JP 8612579A JP S5613423 A JPS5613423 A JP S5613423A
Authority
JP
Japan
Prior art keywords
oxygen
carbon dioxide
mixed gas
bath
blowing
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
JP8612579A
Other languages
Japanese (ja)
Inventor
Masaharu Anezaki
Yujo Marukawa
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
Sumitomo Metal Industries 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 Sumitomo Metal Industries Ltd filed Critical Sumitomo Metal Industries Ltd
Priority to JP8612579A priority Critical patent/JPS5613423A/en
Publication of JPS5613423A publication Critical patent/JPS5613423A/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
    • C21C5/34—Blowing 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 increase the stirring force for steel bath, by blowing a mixed gas of oxygen with carbon dioxide into the bath during oxygen top-blowing operation period or continuously to the discharging period. CONSTITUTION:In the final period of oxygen top-blowing steel making process, carbon contained in molten steel decreases, hence generation of carbon monoxide decreases rapidly, consequently the reaction of molten steel with molten slag goes down quickly so that stirring force also goes down. Therefore the stirring force is increased by blowing a mixed gas of oxygen with carbon dioxide into the bath thereby improving the refining efficiency. As the mixed gas are used a portion of top- blown oxygen and carbon dioxide produced by the purification of exhaust gas, and 0.5-2.0 oxygen/carbon dioxide mixing ratio is preferable. It is preferable to use a nozzle provided at the bottom or side of the refining vessel in order to blow the mixed gas into the bath.
JP8612579A 1979-07-06 1979-07-06 Refining method for steel Pending JPS5613423A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP8612579A JPS5613423A (en) 1979-07-06 1979-07-06 Refining method for steel

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP8612579A JPS5613423A (en) 1979-07-06 1979-07-06 Refining method for steel

Publications (1)

Publication Number Publication Date
JPS5613423A true JPS5613423A (en) 1981-02-09

Family

ID=13877972

Family Applications (1)

Application Number Title Priority Date Filing Date
JP8612579A Pending JPS5613423A (en) 1979-07-06 1979-07-06 Refining method for steel

Country Status (1)

Country Link
JP (1) JPS5613423A (en)

Cited By (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS57140811A (en) * 1981-02-25 1982-08-31 Nippon Steel Corp Protection method for double pipe tuyere for bottom blowing of oxygen
JPS57143420A (en) * 1981-02-27 1982-09-04 Kawasaki Steel Corp Steel making method by converter
FR2501236A1 (en) * 1981-03-03 1982-09-10 Sumitomo Metal Ind PROCESS FOR REFINING STEEL WITH HIGH CHROMIUM CONTENT
JPS57149409A (en) * 1981-03-09 1982-09-16 Nippon Steel Corp Refining by top and bottom blowing converter
JPS5882942A (en) * 1981-11-10 1983-05-18 Toppan Danball Kk Corrugated cardboard transferring device positioned after corrugate cutter
JPS58204112A (en) * 1982-05-24 1983-11-28 Nippon Steel Corp Refining method of pig iron
JPS59192069U (en) * 1983-06-08 1984-12-20 三菱重工業株式会社 Sheet disturbance prevention device
JPS60184615A (en) * 1984-03-02 1985-09-20 Kawasaki Steel Corp Blowing method for top and bottom blown converter
JPS6376758U (en) * 1986-11-06 1988-05-21

Cited By (13)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS6235447B2 (en) * 1981-02-25 1987-08-01 Nippon Steel Corp
JPS57140811A (en) * 1981-02-25 1982-08-31 Nippon Steel Corp Protection method for double pipe tuyere for bottom blowing of oxygen
JPS57143420A (en) * 1981-02-27 1982-09-04 Kawasaki Steel Corp Steel making method by converter
FR2501236A1 (en) * 1981-03-03 1982-09-10 Sumitomo Metal Ind PROCESS FOR REFINING STEEL WITH HIGH CHROMIUM CONTENT
JPS57149409A (en) * 1981-03-09 1982-09-16 Nippon Steel Corp Refining by top and bottom blowing converter
JPS635448B2 (en) * 1981-03-09 1988-02-03 Nippon Steel Corp
JPS5882942A (en) * 1981-11-10 1983-05-18 Toppan Danball Kk Corrugated cardboard transferring device positioned after corrugate cutter
JPS58204112A (en) * 1982-05-24 1983-11-28 Nippon Steel Corp Refining method of pig iron
JPS59192069U (en) * 1983-06-08 1984-12-20 三菱重工業株式会社 Sheet disturbance prevention device
JPS6246683Y2 (en) * 1983-06-08 1987-12-18
JPS60184615A (en) * 1984-03-02 1985-09-20 Kawasaki Steel Corp Blowing method for top and bottom blown converter
JPH0360885B2 (en) * 1984-03-02 1991-09-18 Kawasaki Steel Co
JPS6376758U (en) * 1986-11-06 1988-05-21

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