JPS56123316A - Method for making high-carbon steel with combined top- and bottom-blown converter - Google Patents

Method for making high-carbon steel with combined top- and bottom-blown converter

Info

Publication number
JPS56123316A
JPS56123316A JP2396680A JP2396680A JPS56123316A JP S56123316 A JPS56123316 A JP S56123316A JP 2396680 A JP2396680 A JP 2396680A JP 2396680 A JP2396680 A JP 2396680A JP S56123316 A JPS56123316 A JP S56123316A
Authority
JP
Japan
Prior art keywords
blowing
carbon steel
program
converter
lance
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
JP2396680A
Other languages
Japanese (ja)
Other versions
JPS622603B2 (en
Inventor
Katsuhisa Hirayama
Masayuki Onishi
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 Steel Corp
Original Assignee
Kawasaki 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 Kawasaki Steel Corp filed Critical Kawasaki Steel Corp
Priority to JP2396680A priority Critical patent/JPS56123316A/en
Publication of JPS56123316A publication Critical patent/JPS56123316A/en
Publication of JPS622603B2 publication Critical patent/JPS622603B2/ja
Granted 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
    • C21C5/35—Blowing from above and through the bath

Landscapes

  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Manufacturing & Machinery (AREA)
  • Materials Engineering (AREA)
  • Metallurgy (AREA)
  • Organic Chemistry (AREA)

Abstract

PURPOSE:To make high-carbon steel smoothly by incorporating the detecting means which measures the acceleration of the movement of an oxygen lance produced by the movement of slag under blowing with a vibration accelerometer mounted to the oxygen lance of top blowing converter to the blowing regulated by the program of a combined top- and bottom-blown converter. CONSTITUTION:In making high-carbon steel with a combined top- and bottom-blown converter 11, a program is so set with respect to the height of a top blowing lance 12 and the amount of top blowing oxygen that ratio L/L0 of O2 jet entering from the lance 12 (see the figure) conforms to 0.6-0.7 until the blowing progresses to 60-80% the entire process of blowing. On the other hand, a program is so set that the amount of the stirring gas to be blown through bottom tuyeres 21 attains 50-70% ofhe maximum value until the blowing progresses to 60-80% of the entire process of blowing. During the progression of both programs mentioned above, the changes in slagging conditions with the lapse of blowing time are grasped by measuring the movement of the slag in furnace 20 in furnace with respect to the crystal oscillation accelerometer 13 inserted into the furnace 11. Next, the making of high-carbon steel with the converter 11 is carried out while the above-mentioned top blowing program is being corrected by the detection of these changes in the slagging conditions.
JP2396680A 1980-02-29 1980-02-29 Method for making high-carbon steel with combined top- and bottom-blown converter Granted JPS56123316A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP2396680A JPS56123316A (en) 1980-02-29 1980-02-29 Method for making high-carbon steel with combined top- and bottom-blown converter

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP2396680A JPS56123316A (en) 1980-02-29 1980-02-29 Method for making high-carbon steel with combined top- and bottom-blown converter

Publications (2)

Publication Number Publication Date
JPS56123316A true JPS56123316A (en) 1981-09-28
JPS622603B2 JPS622603B2 (en) 1987-01-21

Family

ID=12125285

Family Applications (1)

Application Number Title Priority Date Filing Date
JP2396680A Granted JPS56123316A (en) 1980-02-29 1980-02-29 Method for making high-carbon steel with combined top- and bottom-blown converter

Country Status (1)

Country Link
JP (1) JPS56123316A (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS58147507A (en) * 1982-02-27 1983-09-02 Kawasaki Steel Corp Blowing method for acceleration of dephosphorization by combination of top and bottom blowing
JP2013036055A (en) * 2011-08-03 2013-02-21 Nippon Steel & Sumitomo Metal Corp Method of decarburizing molten iron

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS63176423U (en) * 1987-05-08 1988-11-16

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS58147507A (en) * 1982-02-27 1983-09-02 Kawasaki Steel Corp Blowing method for acceleration of dephosphorization by combination of top and bottom blowing
JP2013036055A (en) * 2011-08-03 2013-02-21 Nippon Steel & Sumitomo Metal Corp Method of decarburizing molten iron

Also Published As

Publication number Publication date
JPS622603B2 (en) 1987-01-21

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