JPS57192210A - Dephosphorization of low-silicon pig iron - Google Patents

Dephosphorization of low-silicon pig iron

Info

Publication number
JPS57192210A
JPS57192210A JP7472081A JP7472081A JPS57192210A JP S57192210 A JPS57192210 A JP S57192210A JP 7472081 A JP7472081 A JP 7472081A JP 7472081 A JP7472081 A JP 7472081A JP S57192210 A JPS57192210 A JP S57192210A
Authority
JP
Japan
Prior art keywords
pig iron
low
fluxing
assistant
blowing
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.)
Granted
Application number
JP7472081A
Other languages
Japanese (ja)
Other versions
JPH0135046B2 (en
Inventor
Hitoshi Morishita
Sumio Yamada
Fumio Sudo
Hideji Takeuchi
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 Steel Corp
Original Assignee
Kawasaki Steel Corp
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 Kawasaki Steel Corp filed Critical Kawasaki Steel Corp
Priority to JP7472081A priority Critical patent/JPS57192210A/en
Priority to EP19810302859 priority patent/EP0043238B1/en
Priority to DE8181302859T priority patent/DE3166581D1/en
Priority to AU72345/81A priority patent/AU529793B2/en
Publication of JPS57192210A publication Critical patent/JPS57192210A/en
Publication of JPH0135046B2 publication Critical patent/JPH0135046B2/ja
Granted 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
    • C21C1/00—Refining of pig-iron; Cast iron
    • C21C1/02—Dephosphorising or desulfurising
    • C21C1/025—Agents used for dephosphorising or desulfurising
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
    • Y02P10/00—Technologies related to metal processing
    • Y02P10/20—Recycling

Landscapes

  • Chemical & Material Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Materials Engineering (AREA)
  • Metallurgy (AREA)
  • Organic Chemistry (AREA)
  • Refinement Of Pig-Iron, Manufacture Of Cast Iron, And Steel Manufacture Other Than In Revolving Furnaces (AREA)

Abstract

PURPOSE:To efficiently dephosphorize low-Si pig iron, by blowing and charging specified amounts of a powdery refining agent and a fluxing assistant to the low-Si pig iron in a bottom-blown converter, and holding the pig iron at a specified temperature by charge of a cooling agent. CONSTITUTION:Low-Si molten pig iron containing 0.15wt% or less of Si is poured into a bottom-blown converter, a powdery refining agent is injected by bottom-blowing refining gas as a carrier, a fluxing assistant is charged through the top opening of the vessel, and the temperature of the molten pig iron during blowing is held and controlled at 1,250-1,450 deg.C by charge of a cooling agent. In order to attain a dephosphorizing ratio of about 85% or more, 12kg or more of the powdery refining agent of calcium oxide powder is blown in, and 2kg or more of the fluxing assistant comprising at least one or fluorite, soda ash, cryolite, colemanite and red mud is charged. As the cooling agent is used at least one of iron ore, mill scale and scrap.
JP7472081A 1980-06-28 1981-05-18 Dephosphorization of low-silicon pig iron Granted JPS57192210A (en)

Priority Applications (4)

Application Number Priority Date Filing Date Title
JP7472081A JPS57192210A (en) 1981-05-18 1981-05-18 Dephosphorization of low-silicon pig iron
EP19810302859 EP0043238B1 (en) 1980-06-28 1981-06-25 Method of dephosphorizing molten pig iron
DE8181302859T DE3166581D1 (en) 1980-06-28 1981-06-25 Method of dephosphorizing molten pig iron
AU72345/81A AU529793B2 (en) 1980-06-28 1981-06-29 Method of dephosphorizing molten pig iron

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP7472081A JPS57192210A (en) 1981-05-18 1981-05-18 Dephosphorization of low-silicon pig iron

Publications (2)

Publication Number Publication Date
JPS57192210A true JPS57192210A (en) 1982-11-26
JPH0135046B2 JPH0135046B2 (en) 1989-07-24

Family

ID=13555333

Family Applications (1)

Application Number Title Priority Date Filing Date
JP7472081A Granted JPS57192210A (en) 1980-06-28 1981-05-18 Dephosphorization of low-silicon pig iron

Country Status (1)

Country Link
JP (1) JPS57192210A (en)

Also Published As

Publication number Publication date
JPH0135046B2 (en) 1989-07-24

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