JPS57149413A - Addition of mn to molten steel - Google Patents

Addition of mn to molten steel

Info

Publication number
JPS57149413A
JPS57149413A JP3340681A JP3340681A JPS57149413A JP S57149413 A JPS57149413 A JP S57149413A JP 3340681 A JP3340681 A JP 3340681A JP 3340681 A JP3340681 A JP 3340681A JP S57149413 A JPS57149413 A JP S57149413A
Authority
JP
Japan
Prior art keywords
slag
molten steel
cao
mno
added
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
JP3340681A
Other languages
Japanese (ja)
Inventor
Akihiko Nanba
Kenichiro Suzuki
Takashi Omori
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 JP3340681A priority Critical patent/JPS57149413A/en
Publication of JPS57149413A publication Critical patent/JPS57149413A/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
    • C21C7/00—Treating molten ferrous alloys, e.g. steel, not covered by groups C21C1/00 - C21C5/00
    • C21C7/0006—Adding metallic additives

Abstract

PURPOSE:To raise the yield of Mn as well as prevent the reversion of P from molten slag in the adjustment of the Mn content of the molten steel by a method in which a Mn oxide and a Fe-Si substance as a reducing agent are added to the molten steel and the basicity of slag formed is adjusted within a specific range. CONSTITUTION:In the addition of Mn to molten steel for adjusting the Mn content of the molten steel, a Mn oxide or a slag generated in the manufacture of a Fe-Mn substance is used as a Mn source. At the same time, a Fe-Si powder is added to the molten steel to reduce MnO2 and MnO present in the Mn ore and Fe-Mn slag. In this case, CaO is concurrently added to adjust the basicity[(CaO+MgO)/SiO2]of slag formed within a range of 1.8-4.0. Since MnO to combine with SiO2 in the slag is replaced with CaO and separated into a free state, the reduction of MnO to Mn by Si is effectively conducted to raise the yield of Mn. At the same time, P2O5 in the slag is fixed by CaO into a stable state in the slag to prevent the reversion of P into the molten steel.
JP3340681A 1981-03-09 1981-03-09 Addition of mn to molten steel Pending JPS57149413A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP3340681A JPS57149413A (en) 1981-03-09 1981-03-09 Addition of mn to molten steel

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP3340681A JPS57149413A (en) 1981-03-09 1981-03-09 Addition of mn to molten steel

Publications (1)

Publication Number Publication Date
JPS57149413A true JPS57149413A (en) 1982-09-16

Family

ID=12385709

Family Applications (1)

Application Number Title Priority Date Filing Date
JP3340681A Pending JPS57149413A (en) 1981-03-09 1981-03-09 Addition of mn to molten steel

Country Status (1)

Country Link
JP (1) JPS57149413A (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2006206957A (en) * 2005-01-27 2006-08-10 Jfe Bars & Shapes Corp Method for recovering manganese from slag produced when manufacturing manganese-based ferroalloy
JP2015193924A (en) * 2014-03-19 2015-11-05 Ｊｆｅスチール株式会社 Method for recycling dust generated in rh vacuum degassing apparatus

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5291722A (en) * 1976-01-29 1977-08-02 Sumitomo Metal Ind Ltd Revision of slag
JPS545764A (en) * 1977-06-15 1979-01-17 Showa Electric Wire & Cable Co Device of detecting deformed condition of filament body
JPS5477214A (en) * 1977-12-02 1979-06-20 Otani Masayasu Simultaneous dephosphorizing and desulfurizing smelting agent for molten iron alloy
JPS54159322A (en) * 1978-06-08 1979-12-17 Kawasaki Steel Co Prevention of rephosphoring molten steel
JPS5540085A (en) * 1978-09-15 1980-03-21 Aisin Seiki Co Ltd Manufacture of circular body and its device

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5291722A (en) * 1976-01-29 1977-08-02 Sumitomo Metal Ind Ltd Revision of slag
JPS545764A (en) * 1977-06-15 1979-01-17 Showa Electric Wire & Cable Co Device of detecting deformed condition of filament body
JPS5477214A (en) * 1977-12-02 1979-06-20 Otani Masayasu Simultaneous dephosphorizing and desulfurizing smelting agent for molten iron alloy
JPS54159322A (en) * 1978-06-08 1979-12-17 Kawasaki Steel Co Prevention of rephosphoring molten steel
JPS5540085A (en) * 1978-09-15 1980-03-21 Aisin Seiki Co Ltd Manufacture of circular body and its device

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2006206957A (en) * 2005-01-27 2006-08-10 Jfe Bars & Shapes Corp Method for recovering manganese from slag produced when manufacturing manganese-based ferroalloy
JP2015193924A (en) * 2014-03-19 2015-11-05 Ｊｆｅスチール株式会社 Method for recycling dust generated in rh vacuum degassing apparatus

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