JPS5767109A - Steel making method - Google Patents

Steel making method

Info

Publication number
JPS5767109A
JPS5767109A JP13979980A JP13979980A JPS5767109A JP S5767109 A JPS5767109 A JP S5767109A JP 13979980 A JP13979980 A JP 13979980A JP 13979980 A JP13979980 A JP 13979980A JP S5767109 A JPS5767109 A JP S5767109A
Authority
JP
Japan
Prior art keywords
lance
blowing lance
yield
iron
circular motion
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
JP13979980A
Other languages
Japanese (ja)
Inventor
Moriyuki Ishiguro
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 JP13979980A priority Critical patent/JPS5767109A/en
Publication of JPS5767109A publication Critical patent/JPS5767109A/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
    • C21C5/32—Blowing from above

Landscapes

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

Abstract

PURPOSE:To improve the yield of iron and Mn and dephosphorization rate by top- blowing refining gases into a converter or the like and at the same time, moving a top blowing lance continuously in a manner as to draw other loci except circular motion. CONSTITUTION:In converter steel making or the like, gaseous mixture of gaseous oxygen and an inert gas is top-blown by a top blowing lance. At this same instant, the top blowing lance is continuously moved two- or three-dimensionally in a manner as to draw single or combined loci of single-stroke continuous pattern of triangular, square, elliptical, star, and spiral shapes except circular motion during refining. The stirring of molten steel slag is made easy by such lance movement, and since the CO partial pressure (Pco) during refining lowers, the %TFe in the slag can be reduced while the concn. of phosphorus on the steel is maintained at a low level, and the yield of iron is improved. In addition, %Mn is on rather a high level, and the reduction in the Mn alloy material to be added is made possible.
JP13979980A 1980-10-08 1980-10-08 Steel making method Pending JPS5767109A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP13979980A JPS5767109A (en) 1980-10-08 1980-10-08 Steel making method

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP13979980A JPS5767109A (en) 1980-10-08 1980-10-08 Steel making method

Publications (1)

Publication Number Publication Date
JPS5767109A true JPS5767109A (en) 1982-04-23

Family

ID=15253695

Family Applications (1)

Application Number Title Priority Date Filing Date
JP13979980A Pending JPS5767109A (en) 1980-10-08 1980-10-08 Steel making method

Country Status (1)

Country Link
JP (1) JPS5767109A (en)

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