JPS6468416A - Method for decarburizing high-cr molten pig iron - Google Patents

Method for decarburizing high-cr molten pig iron

Info

Publication number
JPS6468416A
JPS6468416A JP22404887A JP22404887A JPS6468416A JP S6468416 A JPS6468416 A JP S6468416A JP 22404887 A JP22404887 A JP 22404887A JP 22404887 A JP22404887 A JP 22404887A JP S6468416 A JPS6468416 A JP S6468416A
Authority
JP
Japan
Prior art keywords
blowing
pig iron
decarburization
molten pig
inert gas
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
JP22404887A
Other languages
Japanese (ja)
Inventor
Haruyoshi Tanabe
Masahiro Kawakami
Kenji Takahashi
Katsuhiro Iwasaki
Shigeru Inoue
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 JP22404887A priority Critical patent/JPS6468416A/en
Priority to ZA886672A priority patent/ZA886672B/en
Priority to CA000576818A priority patent/CA1333663C/en
Priority to DE3888518T priority patent/DE3888518T2/en
Priority to US07/320,270 priority patent/US5047081A/en
Priority to PCT/JP1988/000909 priority patent/WO1989002479A1/en
Priority to AT88907784T priority patent/ATE103006T1/en
Priority to EP88907784A priority patent/EP0331751B1/en
Priority to AU23058/88A priority patent/AU619488B2/en
Priority to BR888807195A priority patent/BR8807195A/en
Priority to CN88107053A priority patent/CN1013280B/en
Publication of JPS6468416A publication Critical patent/JPS6468416A/en
Pending legal-status Critical Current

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  • Carbon Steel Or Casting Steel Manufacturing (AREA)

Abstract

PURPOSE:To inhibit Cr oxidation loss under atmospheric pressure and to carry out decarburizing treatment in a short time, by top-blowing an O2 gas diluted with inert gas through a top-blowing lance against high-Cr molten pig iron in a vessel and also blowing an inert gas through bottom-blowing tuyeres. CONSTITUTION:O2 for decarburization diluted with inert gas is top-blown through a top-blowing lance against high-Cr molten pig iron in a vessel provided with bottom-blowing tuyeres and the top-blowing lance. Simultaneously, an inert gas is blown through the bottom-blowing tuyeres, by which the molten pig iron is subjected to vigorous agitation. At this time, it is preferable that the proportion of inert gas for dilution in a top-blown gas is successively raised, according to progress of decarburization, from the middle of blowing and also the throttling of O2 for decarburization is carried out by stages or continuously. By this method, the decarburization of high-Cr molten pig iron can be carried out with high efficiency while obviating the necessity of vacuum decarburization.
JP22404887A 1987-09-09 1987-09-09 Method for decarburizing high-cr molten pig iron Pending JPS6468416A (en)

Priority Applications (11)

Application Number Priority Date Filing Date Title
JP22404887A JPS6468416A (en) 1987-09-09 1987-09-09 Method for decarburizing high-cr molten pig iron
ZA886672A ZA886672B (en) 1987-09-09 1988-09-08 A method of decarburizing high chromium molten metal
CA000576818A CA1333663C (en) 1987-09-09 1988-09-08 Method of decarburizing high cr molten metal
DE3888518T DE3888518T2 (en) 1987-09-09 1988-09-09 METHOD FOR THE DECARBONIZING OF HIGH CHROMED PIG IRON.
US07/320,270 US5047081A (en) 1987-09-09 1988-09-09 Method of decarburizing high chromium molten metal
PCT/JP1988/000909 WO1989002479A1 (en) 1987-09-09 1988-09-09 Process for decarburizing high-cr molten pig iron
AT88907784T ATE103006T1 (en) 1987-09-09 1988-09-09 PROCESS FOR DECARBURIZING HIGH CHROMIUM PIG IRON.
EP88907784A EP0331751B1 (en) 1987-09-09 1988-09-09 PROCESS FOR DECARBURIZING HIGH-Cr MOLTEN PIG IRON
AU23058/88A AU619488B2 (en) 1987-09-09 1988-09-09 Process for decarburizing high-cr molten pig iron
BR888807195A BR8807195A (en) 1987-09-09 1988-09-09 PROCESS FOR DECARBURIZING METAL MELTED WITH HIGH CHROME CONTENT
CN88107053A CN1013280B (en) 1987-09-09 1988-09-09 Decarbonization method of high-chromium molten iron

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP22404887A JPS6468416A (en) 1987-09-09 1987-09-09 Method for decarburizing high-cr molten pig iron

Publications (1)

Publication Number Publication Date
JPS6468416A true JPS6468416A (en) 1989-03-14

Family

ID=16807776

Family Applications (1)

Application Number Title Priority Date Filing Date
JP22404887A Pending JPS6468416A (en) 1987-09-09 1987-09-09 Method for decarburizing high-cr molten pig iron

Country Status (2)

Country Link
JP (1) JPS6468416A (en)
ZA (1) ZA886672B (en)

Also Published As

Publication number Publication date
ZA886672B (en) 1989-08-30

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