JPS6475616A - Slag refining method in molten iron pretreatment - Google Patents

Slag refining method in molten iron pretreatment

Info

Publication number
JPS6475616A
JPS6475616A JP23092087A JP23092087A JPS6475616A JP S6475616 A JPS6475616 A JP S6475616A JP 23092087 A JP23092087 A JP 23092087A JP 23092087 A JP23092087 A JP 23092087A JP S6475616 A JPS6475616 A JP S6475616A
Authority
JP
Japan
Prior art keywords
molten iron
slag
converter
blowing
generated
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
JP23092087A
Other languages
Japanese (ja)
Inventor
Satoshi Kodaira
Hiromi Nakamura
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 JP23092087A priority Critical patent/JPS6475616A/en
Publication of JPS6475616A publication Critical patent/JPS6475616A/en
Pending legal-status Critical Current

Links

Abstract

PURPOSE:To effectively utilize generated slag in a converter by blowing molten iron pretreated for reducing P in a converter under less-slag, charging Mn- contained material in the converter and using the generated slag to pretreatment of the molten iron of the blast furnace. CONSTITUTION:While blowing CaO powder into the molten iron 1 charged in the molten iron 1 ladle 2 with a lance 3, oxygen gas is blown with a lance 4 to promote the dephosphorizing reaction by oxydizing, and this pretreated molten iron 1 is introduced into the converter and Mn-contained material is charged in the furnace together with a little quantity of slag making material to execute the less-slag blowing. The slag 5 generated by the less-slag blowing is charged into the molten iron 1 tapped in the ladle 2 from the blast furnace together with a little quantity of lime, etc., to pretreat the molten iron 1. By this method, the lime consumption at the time of pretreating the molten iron 1 can be reduced and yield of Mn is improved and further, protection of furnace brick in the converter is strengthened and the generated slag 5 in the converter as industrial waste can be effectively utilized.
JP23092087A 1987-09-17 1987-09-17 Slag refining method in molten iron pretreatment Pending JPS6475616A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP23092087A JPS6475616A (en) 1987-09-17 1987-09-17 Slag refining method in molten iron pretreatment

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP23092087A JPS6475616A (en) 1987-09-17 1987-09-17 Slag refining method in molten iron pretreatment

Publications (1)

Publication Number Publication Date
JPS6475616A true JPS6475616A (en) 1989-03-22

Family

ID=16915352

Family Applications (1)

Application Number Title Priority Date Filing Date
JP23092087A Pending JPS6475616A (en) 1987-09-17 1987-09-17 Slag refining method in molten iron pretreatment

Country Status (1)

Country Link
JP (1) JPS6475616A (en)

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