JPS57188610A - Steelmaking method - Google Patents

Steelmaking method

Info

Publication number
JPS57188610A
JPS57188610A JP7140381A JP7140381A JPS57188610A JP S57188610 A JPS57188610 A JP S57188610A JP 7140381 A JP7140381 A JP 7140381A JP 7140381 A JP7140381 A JP 7140381A JP S57188610 A JPS57188610 A JP S57188610A
Authority
JP
Japan
Prior art keywords
slag
produced
cao
molten iron
suctionally
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
JP7140381A
Other languages
Japanese (ja)
Other versions
JPS6214001B2 (en
Inventor
Hisashi Matsunaga
Shoki Minami
Katsuhiko Ishikura
Shigeaki Tonomura
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.)
Nippon Steel Corp
Original Assignee
Nippon 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 Nippon Steel Corp filed Critical Nippon Steel Corp
Priority to JP7140381A priority Critical patent/JPS57188610A/en
Publication of JPS57188610A publication Critical patent/JPS57188610A/en
Publication of JPS6214001B2 publication Critical patent/JPS6214001B2/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

Abstract

PURPOSE:To decrease the produced amount of slag greatly by discharging the greater portion of produced slag after desilicating molten iron and then performing a dephosphorizing and a desulfurizing treatment by using a CaO treating agent, and performing decarbonization by adding a small amount of a slag making agent in the presence of a small remaining amount of produced slag. CONSTITUTION:After molten iron is desilicated, produced slag is suctionally discharged from above by a slag cleaner. Then, a CaO treating agent, such as CaO-CaCl2 flux, is blown by injection without the molten iron replaced, thereby performing dephosphorization and desulfurization. Then, the great portion, or about 80% of the produced slag is suctionally discharged again by a slag cleaner. Further, the molten iron is sent to a decarbonizing furnace, where a small amount of a slag making agent, such as CaO, is added for a decarbonizing treatment.
JP7140381A 1981-05-14 1981-05-14 Steelmaking method Granted JPS57188610A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP7140381A JPS57188610A (en) 1981-05-14 1981-05-14 Steelmaking method

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP7140381A JPS57188610A (en) 1981-05-14 1981-05-14 Steelmaking method

Publications (2)

Publication Number Publication Date
JPS57188610A true JPS57188610A (en) 1982-11-19
JPS6214001B2 JPS6214001B2 (en) 1987-03-31

Family

ID=13459508

Family Applications (1)

Application Number Title Priority Date Filing Date
JP7140381A Granted JPS57188610A (en) 1981-05-14 1981-05-14 Steelmaking method

Country Status (1)

Country Link
JP (1) JPS57188610A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP4649694B2 (en) * 1999-12-21 2011-03-16 Ｊｆｅスチール株式会社 Hot metal refining method

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5594427A (en) * 1980-01-05 1980-07-17 Nippon Steel Corp Bottom blowing decarbonization method in which sub-material is not used
JPS5594415A (en) * 1979-01-13 1980-07-17 Nippon Steel Corp Steel making method of less slag producing amount

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5594415A (en) * 1979-01-13 1980-07-17 Nippon Steel Corp Steel making method of less slag producing amount
JPS5594427A (en) * 1980-01-05 1980-07-17 Nippon Steel Corp Bottom blowing decarbonization method in which sub-material is not used

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP4649694B2 (en) * 1999-12-21 2011-03-16 Ｊｆｅスチール株式会社 Hot metal refining method

Also Published As

Publication number Publication date
JPS6214001B2 (en) 1987-03-31

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