JPS5729515A - Top-blown oxygen steelmaking method - Google Patents

Top-blown oxygen steelmaking method

Info

Publication number
JPS5729515A
JPS5729515A JP10382780A JP10382780A JPS5729515A JP S5729515 A JPS5729515 A JP S5729515A JP 10382780 A JP10382780 A JP 10382780A JP 10382780 A JP10382780 A JP 10382780A JP S5729515 A JPS5729515 A JP S5729515A
Authority
JP
Japan
Prior art keywords
refining
blown oxygen
lance
locus
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
JP10382780A
Other languages
Japanese (ja)
Inventor
Moriyuki Ishiguro
Koji Toyoda
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 JP10382780A priority Critical patent/JPS5729515A/en
Publication of JPS5729515A publication Critical patent/JPS5729515A/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 contrive to enhance the yield of iron and that of Mn by a method wherein a lance for top-blowing a refining gas is intermittently moved in such a manner as to form a locus other than a circle during a refining process. CONSTITUTION:In a steelmaking furnace, the lance for top-blowing is intermittently moved in a two-dimensional or three-dimensional manner so as to form a locus than a circle during the refining process. By this method, the slag forming properties during the refining and the dephosphorizing ratio are enhanced and the degree of oxidation of the slag is lowered. In additon, the yield of iron at the time of finishing the refining and that of Mn which is added in the form of a ferroalloy are enhanced.
JP10382780A 1980-07-29 1980-07-29 Top-blown oxygen steelmaking method Pending JPS5729515A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP10382780A JPS5729515A (en) 1980-07-29 1980-07-29 Top-blown oxygen steelmaking method

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP10382780A JPS5729515A (en) 1980-07-29 1980-07-29 Top-blown oxygen steelmaking method

Publications (1)

Publication Number Publication Date
JPS5729515A true JPS5729515A (en) 1982-02-17

Family

ID=14364242

Family Applications (1)

Application Number Title Priority Date Filing Date
JP10382780A Pending JPS5729515A (en) 1980-07-29 1980-07-29 Top-blown oxygen steelmaking method

Country Status (1)

Country Link
JP (1) JPS5729515A (en)

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