JPS5496414A - Manufacture of molten steel for continuous casting - Google Patents

Manufacture of molten steel for continuous casting

Info

Publication number
JPS5496414A
JPS5496414A JP351278A JP351278A JPS5496414A JP S5496414 A JPS5496414 A JP S5496414A JP 351278 A JP351278 A JP 351278A JP 351278 A JP351278 A JP 351278A JP S5496414 A JPS5496414 A JP S5496414A
Authority
JP
Japan
Prior art keywords
steel
oxygen
blowing
decarburization
molten steel
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
JP351278A
Other languages
Japanese (ja)
Other versions
JPS5651212B2 (en
Inventor
Sankichi Hori
Yasunori Owada
Satoshi Tsuneoka
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 JP351278A priority Critical patent/JPS5496414A/en
Publication of JPS5496414A publication Critical patent/JPS5496414A/en
Publication of JPS5651212B2 publication Critical patent/JPS5651212B2/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
    • C21C7/00—Treating molten ferrous alloys, e.g. steel, not covered by groups C21C1/00 - C21C5/00
    • C21C7/10—Handling in a vacuum

Landscapes

  • Chemical & Material Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Materials Engineering (AREA)
  • Metallurgy (AREA)
  • Organic Chemistry (AREA)
  • Continuous Casting (AREA)
  • Treatment Of Steel In Its Molten State (AREA)

Abstract

PURPOSE:To reduce the load of a converter and economically manufacture a low carbon steel by discharging molten steel of higher blowing out C content from the converter and subjecting the molten steel to self decarburization to a predetermined carbon grade by vacuum degassing and oxygen blowing. CONSTITUTION:In refining of a low carbon steel contg. C<0.05%, molten steel contg. C>0.09% at the time of blowing out is discharged from a converter. Ferroalloy other than a small amt. of Fe-Mn is not added to the molten steel, and the free oxygen content of the steel is regulated to below 350 ppm. The steel is then treated in a vacuum degassing unit under a reduced press. of 300-100 mmHg to carry out decarburization and degassing according to the reaction C+O CO. As the reaction proceeds, the degassing vessel is evacuated to lower the CO partial press., thereby preventing the decarburization rate from dropping. The amt. of oxygen reduced by the above reaction in the steel is supplied by blowing oxygen. After blowing oxygen up to a carbon content at which a difference between decarburization rate according to oxygen blowing and self decarburization rate according to the above reaction is eliminated, steel of a predetermined carbon content is manufactured by self decarburization.
JP351278A 1978-01-17 1978-01-17 Manufacture of molten steel for continuous casting Granted JPS5496414A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP351278A JPS5496414A (en) 1978-01-17 1978-01-17 Manufacture of molten steel for continuous casting

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP351278A JPS5496414A (en) 1978-01-17 1978-01-17 Manufacture of molten steel for continuous casting

Publications (2)

Publication Number Publication Date
JPS5496414A true JPS5496414A (en) 1979-07-30
JPS5651212B2 JPS5651212B2 (en) 1981-12-03

Family

ID=11559406

Family Applications (1)

Application Number Title Priority Date Filing Date
JP351278A Granted JPS5496414A (en) 1978-01-17 1978-01-17 Manufacture of molten steel for continuous casting

Country Status (1)

Country Link
JP (1) JPS5496414A (en)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS59232212A (en) * 1983-06-14 1984-12-27 Nippon Steel Corp Production of steel
JPH01148439A (en) * 1987-12-02 1989-06-09 Kawasaki Steel Corp Method for improving surface quality of steel containing high oxygen
JPH08291317A (en) * 1995-04-20 1996-11-05 Nippon Steel Corp Method for producing medium carbon Al killed steel

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS59232212A (en) * 1983-06-14 1984-12-27 Nippon Steel Corp Production of steel
JPH01148439A (en) * 1987-12-02 1989-06-09 Kawasaki Steel Corp Method for improving surface quality of steel containing high oxygen
JPH08291317A (en) * 1995-04-20 1996-11-05 Nippon Steel Corp Method for producing medium carbon Al killed steel

Also Published As

Publication number Publication date
JPS5651212B2 (en) 1981-12-03

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