JPS57194204A - Converter blowing method - Google Patents

Converter blowing method

Info

Publication number
JPS57194204A
JPS57194204A JP7858881A JP7858881A JPS57194204A JP S57194204 A JPS57194204 A JP S57194204A JP 7858881 A JP7858881 A JP 7858881A JP 7858881 A JP7858881 A JP 7858881A JP S57194204 A JPS57194204 A JP S57194204A
Authority
JP
Japan
Prior art keywords
nozzle
furnace
tuyeres
circle
subnozzle
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
JP7858881A
Other languages
Japanese (ja)
Inventor
Masayuki Hanmiyo
Teruyuki Hasegawa
Youichi Nimura
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 JP7858881A priority Critical patent/JPS57194204A/en
Publication of JPS57194204A publication Critical patent/JPS57194204A/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
    • 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 insufficient agitation of a steel bath and to accelerate the secondary combustion of CO by top blowing O2 to the molten steel from a lance nozzle provided with a subnozzle on the lateral side of a main nozzle and bottom blowing an agitating gas through tuyeres provided below the steel bath level of a furnace body. CONSTITUTION:The angle theta of the above-described subnozzle 2 is set larger than the angle of a main nozzle 1, and the extension line of the hole of the nozzle 2 is located nearer the centerline C side of the furnace body than the boundary between the surface of the molten steel in the furnace and the furnace wall. On the other hand, tuyeres 3 are provided between the circle that the points of intersection of the extension lines of the O2 jets from the main nozzle 1 and the furnace bottom draw and the circle that the points of 1/2 the distances from said circle up to the inside circumference of the furnace wall draw. O2 is top blown through the nozzle 1 and the nozzle 2 and an agitating gas is bottom blown through the tuyeres 3 by the above-mentioned constitution. As a result, the gaseous CO generated during decarburization is burned positively to CO2 and the heat level in the furnace is increased.
JP7858881A 1981-05-26 1981-05-26 Converter blowing method Pending JPS57194204A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP7858881A JPS57194204A (en) 1981-05-26 1981-05-26 Converter blowing method

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP7858881A JPS57194204A (en) 1981-05-26 1981-05-26 Converter blowing method

Publications (1)

Publication Number Publication Date
JPS57194204A true JPS57194204A (en) 1982-11-29

Family

ID=13666065

Family Applications (1)

Application Number Title Priority Date Filing Date
JP7858881A Pending JPS57194204A (en) 1981-05-26 1981-05-26 Converter blowing method

Country Status (1)

Country Link
JP (1) JPS57194204A (en)

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5014964A (en) * 1973-06-12 1975-02-17
JPS53102205A (en) * 1977-02-19 1978-09-06 Nippon Kokan Kk <Nkk> Duplex lange nozzle for oxygen top-blown converter

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5014964A (en) * 1973-06-12 1975-02-17
JPS53102205A (en) * 1977-02-19 1978-09-06 Nippon Kokan Kk <Nkk> Duplex lange nozzle for oxygen top-blown converter

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