JPS5770214A - Top-blown converters steelmaking method - Google Patents

Top-blown converters steelmaking method

Info

Publication number
JPS5770214A
JPS5770214A JP14436380A JP14436380A JPS5770214A JP S5770214 A JPS5770214 A JP S5770214A JP 14436380 A JP14436380 A JP 14436380A JP 14436380 A JP14436380 A JP 14436380A JP S5770214 A JPS5770214 A JP S5770214A
Authority
JP
Japan
Prior art keywords
blown
slag
gas
lance
pendulum
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
JP14436380A
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 JP14436380A priority Critical patent/JPS5770214A/en
Publication of JPS5770214A publication Critical patent/JPS5770214A/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

Abstract

PURPOSE:To stir a slag effectively even in melting a low-carbon steel by a method wherein a mixed gas is top-blown while swinging a lance in a pendulum-like manner with reference to the surface of a molten steel bath. CONSTITUTION:In a top-blown converter process for steelmaking a mixed gas consisting of oxygen gas and an inert gas is top-blown while singing the lance in the pendulum-like manner with respect to the surface of the molten steel bath. Consequently, the effective energy of impingement of the top-blown gas against the molten pig iron is increased, the slag is stirred effectively and the CO partial pressure (Pco) of the atmosphere inside the furnace is lowered. Accordingly, it becomes possible to contrive to reduce the degree of oxidation of the slag and enhance the yields of Fe and Mn, even in the case of melting a low-carbon steel.
JP14436380A 1980-10-17 1980-10-17 Top-blown converters steelmaking method Pending JPS5770214A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP14436380A JPS5770214A (en) 1980-10-17 1980-10-17 Top-blown converters steelmaking method

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP14436380A JPS5770214A (en) 1980-10-17 1980-10-17 Top-blown converters steelmaking method

Publications (1)

Publication Number Publication Date
JPS5770214A true JPS5770214A (en) 1982-04-30

Family

ID=15360358

Family Applications (1)

Application Number Title Priority Date Filing Date
JP14436380A Pending JPS5770214A (en) 1980-10-17 1980-10-17 Top-blown converters steelmaking method

Country Status (1)

Country Link
JP (1) JPS5770214A (en)

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