JPS57200514A - Method for degassing molten steel - Google Patents

Method for degassing molten steel

Info

Publication number
JPS57200514A
JPS57200514A JP8432381A JP8432381A JPS57200514A JP S57200514 A JPS57200514 A JP S57200514A JP 8432381 A JP8432381 A JP 8432381A JP 8432381 A JP8432381 A JP 8432381A JP S57200514 A JPS57200514 A JP S57200514A
Authority
JP
Japan
Prior art keywords
molten steel
degassing
container
gas
pipe
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
JP8432381A
Other languages
Japanese (ja)
Inventor
Moriyuki Ishiguro
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 Engineering Corp
Original Assignee
NKK Corp
Nippon Kokan Ltd
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 NKK Corp, Nippon Kokan Ltd filed Critical NKK Corp
Priority to JP8432381A priority Critical patent/JPS57200514A/en
Publication of JPS57200514A publication Critical patent/JPS57200514A/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
    • C21C7/10—Handling in a vacuum

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 enhance degassing efficiency of molten steel, in degassing and refining molten steel in an RH degassing apparatus, by blowing an inert gas into a molten steel container from the bottom part thereof to increase recirculating and stirring actions of molten steel. CONSTITUTION:The raising pipe 1 and the falling pipe 2 of a degassing tank 3 are immersed in the molten steel m in a container 4 as well as an inert gas such as Ar or the like is blown into the container from a gas blow-in apparatus 10 provided to the bottom part of the container directly under the raising pipe 1. Gas bubbles of Ar gas are raised through the raising pipe 1 to subject the molten steel to degassing and refining treatment such as dehydrogenation or denitrification in the vacuum part of the degassing tank 3. Because the molten steel is sufficiently stirred from the gas stream from the gas blow-in apparatus provided the bottom part of the container 4 as well as the molten steel issued from the falling pipe 2 forms a short-circuit stream to be prevented from being introduced into the raising pipe 1, the all molten steel is degassed and refined in excellent efficiency.
JP8432381A 1981-06-03 1981-06-03 Method for degassing molten steel Pending JPS57200514A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP8432381A JPS57200514A (en) 1981-06-03 1981-06-03 Method for degassing molten steel

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP8432381A JPS57200514A (en) 1981-06-03 1981-06-03 Method for degassing molten steel

Publications (1)

Publication Number Publication Date
JPS57200514A true JPS57200514A (en) 1982-12-08

Family

ID=13827299

Family Applications (1)

Application Number Title Priority Date Filing Date
JP8432381A Pending JPS57200514A (en) 1981-06-03 1981-06-03 Method for degassing molten steel

Country Status (1)

Country Link
JP (1) JPS57200514A (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH02197515A (en) * 1989-01-25 1990-08-06 Kawasaki Steel Corp Smelting method for dead soft steel having high cleanness
WO2011023337A1 (en) 2009-08-28 2011-03-03 Sms Siemag Aktiengesellschaft Device for degassing molten steel with an improved discharge nozzle

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH02197515A (en) * 1989-01-25 1990-08-06 Kawasaki Steel Corp Smelting method for dead soft steel having high cleanness
WO2011023337A1 (en) 2009-08-28 2011-03-03 Sms Siemag Aktiengesellschaft Device for degassing molten steel with an improved discharge nozzle
DE102009039260A1 (en) 2009-08-28 2011-03-03 Sms Siemag Ag Apparatus for degassing a molten steel with an improved spout
US9181602B2 (en) 2009-08-28 2015-11-10 Sms Group Gmbh Device for degassing molten steel with an improved discharge nozzle

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