JPS5672116A - Circulating type vacuum degassing method - Google Patents

Circulating type vacuum degassing method

Info

Publication number
JPS5672116A
JPS5672116A JP14949779A JP14949779A JPS5672116A JP S5672116 A JPS5672116 A JP S5672116A JP 14949779 A JP14949779 A JP 14949779A JP 14949779 A JP14949779 A JP 14949779A JP S5672116 A JPS5672116 A JP S5672116A
Authority
JP
Japan
Prior art keywords
treatment
vacuum degassing
molten steel
time
gas
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
JP14949779A
Other languages
Japanese (ja)
Inventor
Akira Nobemoto
Kazuya Kuroiwa
Yoshiyuki Kasuya
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 JP14949779A priority Critical patent/JPS5672116A/en
Publication of JPS5672116A publication Critical patent/JPS5672116A/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 accelerate vacuum degassing treatment, such as decarburization reaction, by homonizing a molten steel in a ladle by forced mixing at the initial stage of the circulating vacuum degassing treatment that a molten steel having constant quality may be supplied to the vacuum degassing treatment tank always. CONSTITUTION:During an unstable period at the begining of vacuum degas treatment (RH treatment), namely at least 5-10min from the commencement of treatment, molten steel 6 contained in ladle 5 is agitated by a blown gas from plug 7 and density difference between upper and lower layers of molten steel is eliminated. As a result, the total processing time can be reduced. Moreover, when this gas blowing is performed at the time of alloy adding to RH treatment tank 1, the adding amount required for each time can be increased and adding time required can be reduced. The above-mentioned agitation can also be made by blowing a gas from pipe 8.
JP14949779A 1979-11-20 1979-11-20 Circulating type vacuum degassing method Pending JPS5672116A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP14949779A JPS5672116A (en) 1979-11-20 1979-11-20 Circulating type vacuum degassing method

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP14949779A JPS5672116A (en) 1979-11-20 1979-11-20 Circulating type vacuum degassing method

Publications (1)

Publication Number Publication Date
JPS5672116A true JPS5672116A (en) 1981-06-16

Family

ID=15476434

Family Applications (1)

Application Number Title Priority Date Filing Date
JP14949779A Pending JPS5672116A (en) 1979-11-20 1979-11-20 Circulating type vacuum degassing method

Country Status (1)

Country Link
JP (1) JPS5672116A (en)

Similar Documents

Publication Publication Date Title
US5047081A (en) Method of decarburizing high chromium molten metal
US3268326A (en) Treatment of metal melts
JPS5623215A (en) Converter steel making method
US3099699A (en) Apparatus for degassing molten steel
JPS5672116A (en) Circulating type vacuum degassing method
EP0355163A1 (en) Process for producing molten stainless steel
JPH0420967B2 (en)
US3574603A (en) Method for producing stainless steel
US2837800A (en) Casting of ferrous ingots
DE4401244C2 (en) Process for decarburizing molten steel
JPS5698415A (en) Steel making method
JPS54161514A (en) Vacuum treating method for molten metal
JPS5873713A (en) Manufacture of steel containing strong deoxidation element
JPS56102514A (en) Manufacture of steel
JPS5782452A (en) Manufacture of nonmagnetic high-manganese steel
JPS5754216A (en) Production of low solved aluminum steel
JPS5893810A (en) Deoxidizing method for molten steel
JPS57200514A (en) Method for degassing molten steel
JPH1192821A (en) Production of clean steel in rh degassing apparatus
JPS5496414A (en) Manufacture of molten steel for continuous casting
JPH11293329A (en) Production of extra-low carbon silicon-killed steel excellent in cleaning property
JPH05279721A (en) Method for removing slag in converter
JPH04131316A (en) Method and device for vacuum degassing of extra-low-carbon steel
JPS57137415A (en) Steel making method for chromium-containing steel
JPS5534657A (en) Manufacture of clean steel