JPS5729517A - Steelmaking method using top-blown converter - Google Patents

Steelmaking method using top-blown converter

Info

Publication number
JPS5729517A
JPS5729517A JP10382980A JP10382980A JPS5729517A JP S5729517 A JPS5729517 A JP S5729517A JP 10382980 A JP10382980 A JP 10382980A JP 10382980 A JP10382980 A JP 10382980A JP S5729517 A JPS5729517 A JP S5729517A
Authority
JP
Japan
Prior art keywords
gas
iron
lance
refining
blown
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
JP10382980A
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 JP10382980A priority Critical patent/JPS5729517A/en
Publication of JPS5729517A publication Critical patent/JPS5729517A/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 yields of iron and Mn by a method wherein a refining gas consisting of a mixture of oxygen and an inert gas is blown downward through a top-blowing lance and, simultaneously, the lance is whirled during the refining process. CONSTITUTION:As the refining gas, a mixture of oxygen and an inert gas such as Ar and N2 is used. The mixed gas is blown downward through a single top-blowing lance and, simultaneously, the lance is whirled during the refining process. By this method, it is possible to increase the effective collision energy with which the top- blown gas impinges upon the molten pig, iron, stirring the slag and the molten steel more effectively. At the same time, the CO partial pressure in the atmosphere inside the furnace is lowered. Accordingly, the degree of oxidation of the slag can be blowed and the yields of iron and Mn can be enhanced, particularly in the case of melting a low carbon steel.
JP10382980A 1980-07-29 1980-07-29 Steelmaking method using top-blown converter Pending JPS5729517A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP10382980A JPS5729517A (en) 1980-07-29 1980-07-29 Steelmaking method using top-blown converter

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP10382980A JPS5729517A (en) 1980-07-29 1980-07-29 Steelmaking method using top-blown converter

Publications (1)

Publication Number Publication Date
JPS5729517A true JPS5729517A (en) 1982-02-17

Family

ID=14364302

Family Applications (1)

Application Number Title Priority Date Filing Date
JP10382980A Pending JPS5729517A (en) 1980-07-29 1980-07-29 Steelmaking method using top-blown converter

Country Status (1)

Country Link
JP (1) JPS5729517A (en)

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS51108609A (en) * 1975-03-20 1976-09-27 Sumitomo Metal Ind Sansowabukitenrono suirenho
JPS54118317A (en) * 1978-03-07 1979-09-13 Nippon Kokan Kk <Nkk> Preparation of low carbon steel
JPS54149312A (en) * 1978-05-16 1979-11-22 Kawasaki Steel Co Converter slag making control

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS51108609A (en) * 1975-03-20 1976-09-27 Sumitomo Metal Ind Sansowabukitenrono suirenho
JPS54118317A (en) * 1978-03-07 1979-09-13 Nippon Kokan Kk <Nkk> Preparation of low carbon steel
JPS54149312A (en) * 1978-05-16 1979-11-22 Kawasaki Steel Co Converter slag making control

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