JPS54149313A - Elevated temperature refining method for molten steel - Google Patents

Elevated temperature refining method for molten steel

Info

Publication number
JPS54149313A
JPS54149313A JP5721578A JP5721578A JPS54149313A JP S54149313 A JPS54149313 A JP S54149313A JP 5721578 A JP5721578 A JP 5721578A JP 5721578 A JP5721578 A JP 5721578A JP S54149313 A JPS54149313 A JP S54149313A
Authority
JP
Japan
Prior art keywords
steel
compsn
inert gas
molten steel
deoxidizer
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
JP5721578A
Other languages
Japanese (ja)
Inventor
Yoshinori Tsunehisa
Kanichi Fukui
Takuo Shioda
Eiichi Sudo
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.)
IHI Corp
Original Assignee
IHI 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 IHI Corp filed Critical IHI Corp
Priority to JP5721578A priority Critical patent/JPS54149313A/en
Publication of JPS54149313A publication Critical patent/JPS54149313A/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
    • C21C7/04—Removing impurities by adding a treating agent
    • C21C7/072—Treatment with gases

Landscapes

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

Abstract

PURPOSE:To refine molten steel to a desired compsn. outside a furnace by shifting the steel to a container such as a ladle; adding Al, Si, etc. to raise the steel temp. by heat of oxidation with oxygen; blowing an inert gas to stir the steel and clean it; and adding a deoxidizer and a compsn. regulating alloy. CONSTITUTION:Molten steel is shifted from a melting furnace to ladle 1 provided with porous plug 3 at bottom 2. While introducing an inert gas such as Ar through plug 3 at a rate of 5 l/min, Al; 0.4-0.6% and Si; about 0.5% are added to the steel. Oxygen is then sprayed upon the steel surface through lance 4 and blown into the steel through pipe 5 to oxidize the Al and Si, thereby raising the steel temp. by heat of the oxidation. The formed Al2O3 and SiO2 are allowed to rise to the steel surface with inert gas bubbles and separated. A deoxidizer, a compsn. regulating ferro-alloy, etc. are finally added to deoxidation-refine the steel to a desired compsn. Lining refractory of the melting furnace is scarcely demaged, elongating the service life.
JP5721578A 1978-05-16 1978-05-16 Elevated temperature refining method for molten steel Pending JPS54149313A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP5721578A JPS54149313A (en) 1978-05-16 1978-05-16 Elevated temperature refining method for molten steel

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP5721578A JPS54149313A (en) 1978-05-16 1978-05-16 Elevated temperature refining method for molten steel

Publications (1)

Publication Number Publication Date
JPS54149313A true JPS54149313A (en) 1979-11-22

Family

ID=13049294

Family Applications (1)

Application Number Title Priority Date Filing Date
JP5721578A Pending JPS54149313A (en) 1978-05-16 1978-05-16 Elevated temperature refining method for molten steel

Country Status (1)

Country Link
JP (1) JPS54149313A (en)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS62240709A (en) * 1986-04-11 1987-10-21 Nippon Steel Corp Equipment for temperature rising of molten steel in ladle
JPS63266017A (en) * 1987-04-23 1988-11-02 Sumitomo Metal Ind Ltd Method for refining molten steel while raising temperature in ladle
JPS6456816A (en) * 1987-08-27 1989-03-03 Sumitomo Metal Ind Heating method for molten steel in ladle

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS62240709A (en) * 1986-04-11 1987-10-21 Nippon Steel Corp Equipment for temperature rising of molten steel in ladle
JPS63266017A (en) * 1987-04-23 1988-11-02 Sumitomo Metal Ind Ltd Method for refining molten steel while raising temperature in ladle
JPS6456816A (en) * 1987-08-27 1989-03-03 Sumitomo Metal Ind Heating method for molten steel in ladle
JPH0510406B2 (en) * 1987-08-27 1993-02-09 Sumitomo Metal Ind

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