JPS569319A - Vacuum treatment controller for molten steel - Google Patents

Vacuum treatment controller for molten steel

Info

Publication number
JPS569319A
JPS569319A JP8534279A JP8534279A JPS569319A JP S569319 A JPS569319 A JP S569319A JP 8534279 A JP8534279 A JP 8534279A JP 8534279 A JP8534279 A JP 8534279A JP S569319 A JPS569319 A JP S569319A
Authority
JP
Japan
Prior art keywords
molten steel
vacuum
content
oxygen
molten
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
JP8534279A
Other languages
Japanese (ja)
Inventor
Yuji Senda
Noboru Okuyama
Yasuo Yamagami
Mamoru Izumiyama
Takashi Seki
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 JP8534279A priority Critical patent/JPS569319A/en
Priority to DD22241680A priority patent/DD151965A5/en
Priority to NL8003885A priority patent/NL8003885A/en
Priority to DE19803025425 priority patent/DE3025425C2/en
Publication of JPS569319A publication Critical patent/JPS569319A/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
    • C21C5/00—Manufacture of carbon-steel, e.g. plain mild steel, medium carbon steel or cast steel or stainless steel
    • C21C5/28—Manufacture of steel in the converter
    • C21C5/30—Regulating or controlling the blowing
    • 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)
  • Manufacturing & Machinery (AREA)
  • Treatment Of Steel In Its Molten State (AREA)

Abstract

PURPOSE: To decarburize molten steel to a target C value by automatically controlling the degree of vacuum in a vacuum treatment apparatus and the amount of oxygen to supply on the basis of the content of molten steel, both obtained by measurement of waste gas, specimen, in the decarburization treatment of the molten steel by vacuum degassing.
CONSTITUTION: In order to decarburize and refine a molten stainless steel, etc., under oxidation, in the vacuum treatment apparatus without oxidizing Cr, the ambient pressure of the apparatus 3 is lowered by the evacuator 1, the partial pressure of CO is lowered, and O2 gas from an O2 supplier is blown into the molten steel. In this case, the measured values of the flow meter 4 and the analyzer 6 for waste gas, provided in the waste gas path 4 of the appartus 3, are put in the arithmetical unit 7 to obtain the C content of the molten metal. On the basis of the measured value and the C amount-ambient pressure-oxygen amount relation stored in the memory 10, the vacuum regulator 8 and the O2 gas supply regulator 9 are automatically controlled properly by the control unit 11. Also,at the time when the C content is 0.02W0.06% larger than the target C value, the supply of oxygen is stopped and decarburization is performed by O2 present in the molten steel, the O2 content of the molten steel is reduced, and the consumption of Al of deoxidizer is saved.
COPYRIGHT: (C)1981,JPO&Japio
JP8534279A 1979-07-05 1979-07-05 Vacuum treatment controller for molten steel Pending JPS569319A (en)

Priority Applications (4)

Application Number Priority Date Filing Date Title
JP8534279A JPS569319A (en) 1979-07-05 1979-07-05 Vacuum treatment controller for molten steel
DD22241680A DD151965A5 (en) 1979-07-05 1980-07-04 METHOD AND DEVICE FOR CONTROLLING THE VACUUM GASIFICATION OF A STEEL MELT
NL8003885A NL8003885A (en) 1979-07-05 1980-07-04 METHOD AND APPARATUS FOR CONTROLLING THE VACUUM DEGASSIFICATION OF MOLED STEEL.
DE19803025425 DE3025425C2 (en) 1979-07-05 1980-07-04 Method and device for controlling the vacuum degassing of a steel melt

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP8534279A JPS569319A (en) 1979-07-05 1979-07-05 Vacuum treatment controller for molten steel

Publications (1)

Publication Number Publication Date
JPS569319A true JPS569319A (en) 1981-01-30

Family

ID=13855973

Family Applications (1)

Application Number Title Priority Date Filing Date
JP8534279A Pending JPS569319A (en) 1979-07-05 1979-07-05 Vacuum treatment controller for molten steel

Country Status (4)

Country Link
JP (1) JPS569319A (en)
DD (1) DD151965A5 (en)
DE (1) DE3025425C2 (en)
NL (1) NL8003885A (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS62263916A (en) * 1986-05-10 1987-11-16 Sumitomo Metal Ind Ltd Controlling method for carbon content of molten steel for vacuum refining furnace
JPS634013A (en) * 1986-06-23 1988-01-09 Nisshin Steel Co Ltd Decarburizing method for molten stainless steel

Families Citing this family (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS6173817A (en) * 1984-09-18 1986-04-16 Sumitomo Electric Ind Ltd Method and apparatus for control refining molten steel
DE3706742A1 (en) * 1987-02-28 1988-09-08 Salzgitter Peine Stahlwerke METHOD AND DEVICE FOR DEGASSING TREATMENT OF A STEEL MELT IN A VACUUM SYSTEM
DE19540490C1 (en) * 1995-10-23 1997-04-10 Mannesmann Ag Process for decarburizing a molten steel
FR2835613B1 (en) * 2002-02-06 2004-10-01 Air Liquide METHOD AND DEVICE FOR DETERMINING THE CONCENTRATION OF CARBON IN LIQUID STEEL

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS4859017A (en) * 1971-11-30 1973-08-18
JPS5181722A (en) * 1975-01-16 1976-07-17 Nippon Yakin Kogyo Co Ltd YOKONOSHINKUSEIRENSEIGYOHOHO

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3594155A (en) * 1968-10-30 1971-07-20 Allegheny Ludlum Steel Method for dynamically controlling decarburization of steel
US3700429A (en) * 1970-01-05 1972-10-24 Allegheny Ludlum Steel Method of controlling vacuum decarburization
JPS5442324A (en) * 1977-09-10 1979-04-04 Nisshin Steel Co Ltd Control procedure of steel making process using mass spectrometer

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS4859017A (en) * 1971-11-30 1973-08-18
JPS5181722A (en) * 1975-01-16 1976-07-17 Nippon Yakin Kogyo Co Ltd YOKONOSHINKUSEIRENSEIGYOHOHO

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS62263916A (en) * 1986-05-10 1987-11-16 Sumitomo Metal Ind Ltd Controlling method for carbon content of molten steel for vacuum refining furnace
JPS634013A (en) * 1986-06-23 1988-01-09 Nisshin Steel Co Ltd Decarburizing method for molten stainless steel

Also Published As

Publication number Publication date
DE3025425C2 (en) 1986-10-09
DE3025425A1 (en) 1981-01-15
DD151965A5 (en) 1981-11-11
NL8003885A (en) 1981-01-07

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