JPS5521504A - Controlling method for decarburization of molten steel - Google Patents

Controlling method for decarburization of molten steel

Info

Publication number
JPS5521504A
JPS5521504A JP9230578A JP9230578A JPS5521504A JP S5521504 A JPS5521504 A JP S5521504A JP 9230578 A JP9230578 A JP 9230578A JP 9230578 A JP9230578 A JP 9230578A JP S5521504 A JPS5521504 A JP S5521504A
Authority
JP
Japan
Prior art keywords
molten steel
vacuum
temperature
oxygen
decarburization
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
JP9230578A
Other languages
Japanese (ja)
Other versions
JPS6043408B2 (en
Inventor
Yozo Takemura
Toyoichi Saito
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 JP9230578A priority Critical patent/JPS6043408B2/en
Publication of JPS5521504A publication Critical patent/JPS5521504A/en
Publication of JPS6043408B2 publication Critical patent/JPS6043408B2/en
Expired 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 efficiently refine molten steel in a vacuum degassing vessel, by regulating the quantity of blown oxygen to control the vacuum pressure below a prescribed level when decarburizing the molten steel. CONSTITUTION:The vacuum degassing vessel 1 is provided with a vacuum pressure gauge 2. The pressure in the vessel 1 is introduced into a controller 3. A flow control valve 5 installed in an oxygen blowing pipe 4 is regulated by the output of the controller 3. The vacuum pressure is set at 400 Torr or less to obtain a high decarburization efficiency. Necessary quantities of oxygen, coolant and temprature raising agent are calculated from the carbon content and temperature of the molten steel not yet treated, those of the molten steel on a command point and desired decarburization efficiency and temperature raising efficiency to decarburize the molten steel under a vacuum. The fall in the temperature of the molten steel is compensated by the decarburizing reaction. Therefore, the molten steel is efficiently refined.
JP9230578A 1978-07-28 1978-07-28 Molten steel decarburization control method Expired JPS6043408B2 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP9230578A JPS6043408B2 (en) 1978-07-28 1978-07-28 Molten steel decarburization control method

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP9230578A JPS6043408B2 (en) 1978-07-28 1978-07-28 Molten steel decarburization control method

Publications (2)

Publication Number Publication Date
JPS5521504A true JPS5521504A (en) 1980-02-15
JPS6043408B2 JPS6043408B2 (en) 1985-09-27

Family

ID=14050689

Family Applications (1)

Application Number Title Priority Date Filing Date
JP9230578A Expired JPS6043408B2 (en) 1978-07-28 1978-07-28 Molten steel decarburization control method

Country Status (1)

Country Link
JP (1) JPS6043408B2 (en)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH0230711A (en) * 1988-07-18 1990-02-01 Kawasaki Steel Corp Manufacture of extremely low carbon steel having superior cleanness
JPH03193815A (en) * 1989-12-22 1991-08-23 Kawasaki Steel Corp Smelting method for high-cleanliness dead soft steel
CN105603158A (en) * 2016-03-10 2016-05-25 河北钢铁股份有限公司邯郸分公司 Method for controlling dissolved carbon content in ultralow-carbon bake-hardening steel

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1154023A1 (en) * 1995-08-01 2001-11-14 Nippon Steel Corporation Vacuum refining method for molten steel

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH0230711A (en) * 1988-07-18 1990-02-01 Kawasaki Steel Corp Manufacture of extremely low carbon steel having superior cleanness
JPH03193815A (en) * 1989-12-22 1991-08-23 Kawasaki Steel Corp Smelting method for high-cleanliness dead soft steel
CN105603158A (en) * 2016-03-10 2016-05-25 河北钢铁股份有限公司邯郸分公司 Method for controlling dissolved carbon content in ultralow-carbon bake-hardening steel

Also Published As

Publication number Publication date
JPS6043408B2 (en) 1985-09-27

Similar Documents

Publication Publication Date Title
US3046107A (en) Decarburization process for highchromium steel
GB1087079A (en) Improvements in or relating to metallurgical converter control systems and methods
JPS5521504A (en) Controlling method for decarburization of molten steel
US5190577A (en) Replacement of argon with carbon dioxide in a reactor containing molten metal for the purpose of refining molten metal
ES8302787A1 (en) Process for refining high-chromium steels
ES8203971A1 (en) Process for operating a blast furnace
CN214422680U (en) RH refining furnace ascending pipe internal side blowing CO2-Ar refining device
JPS56142815A (en) Refining method of stainless steel
US3692293A (en) Apparatus for blowing high-temperature reducing gas into blast furnace
TW346505B (en) Process for producing low-carbon chromium-containing steel
GB1153938A (en) Improvements in and relating to the Refining of Pig Iron
EP0160375A2 (en) System and method for producing steel in a top-blown vessel
JPS5265710A (en) Method of producing low phosphorus molten cast iron
JPS57137415A (en) Steel making method for chromium-containing steel
GB1241242A (en) Process for the automatic control of the pig iron refining operation
JPS5773315A (en) Melting furnace for wastes and its operation
JPS54119316A (en) Slopping control method in converter
JPS56102518A (en) Annealing method for steel
JPS5770215A (en) Controlling method for finish temperature of converter operation
JPS56123315A (en) Method for controlling blowing in converter
US3528802A (en) Deoxidation process
JPS5629619A (en) Treatment apparatus of pressurized molten metal
JPS5514873A (en) Operating method for vacuum degassing of molten steel
GB1156392A (en) Process and Apparatus for Stopping the Blowing of Oxidising Gas into a Bath of Crude Iron
JPS5735620A (en) Method for controlling furnace gas in bright heat treatment