JPS5789417A - Switching method of bottom blowing gas of converter - Google Patents

Switching method of bottom blowing gas of converter

Info

Publication number
JPS5789417A
JPS5789417A JP16513380A JP16513380A JPS5789417A JP S5789417 A JPS5789417 A JP S5789417A JP 16513380 A JP16513380 A JP 16513380A JP 16513380 A JP16513380 A JP 16513380A JP S5789417 A JPS5789417 A JP S5789417A
Authority
JP
Japan
Prior art keywords
gas
tuyere
gases
pressure
switching
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
JP16513380A
Other languages
Japanese (ja)
Other versions
JPS6151608B2 (en
Inventor
Kunio Iwai
Akira Saito
Akira Konakano
Nozomi Matsumoto
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 JP16513380A priority Critical patent/JPS5789417A/en
Publication of JPS5789417A publication Critical patent/JPS5789417A/en
Publication of JPS6151608B2 publication Critical patent/JPS6151608B2/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
    • C21C5/34—Blowing 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 prevent the variation in pressure at the tip part of tuyere as well as interrupt the back flow of molten metal to the tuyere by a method in which the opening degrees of flow regulating valve for afterward gas and the pressures of forward and after ward gases are controlled under fixed conditions and the switching of the gases is made by controlling the pressure. CONSTITUTION:Gases supply pipes 5 and 5' through which gases from forward gas source 4 (gas A) and afterward gas source 4' (gas B) are supplied to a bottom blowing tuyere 3 are provided with gas pressure gauges 6 and 6', gas flow meters 7 and 7', gas flow regulating valves 8 and 8', stop valves 9 and 9', and check valves 10 and 10'. When switching gas A to gas B, pressure before the tuyere 3 and the opening degree of the flow regulating valve 8' for gas B are controlled to specified value for afterward status by a controller 1 and gas B being pressurized is confirmed. Afterwards, the stop valve 9' for gas B is opened. Then, the stop valve 9 for gas A is closed to complete the switching work. Thus, the variation in pressure before the tuyere 3 can be prevented when the switching work is made.
JP16513380A 1980-11-22 1980-11-22 Switching method of bottom blowing gas of converter Granted JPS5789417A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP16513380A JPS5789417A (en) 1980-11-22 1980-11-22 Switching method of bottom blowing gas of converter

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP16513380A JPS5789417A (en) 1980-11-22 1980-11-22 Switching method of bottom blowing gas of converter

Publications (2)

Publication Number Publication Date
JPS5789417A true JPS5789417A (en) 1982-06-03
JPS6151608B2 JPS6151608B2 (en) 1986-11-10

Family

ID=15806521

Family Applications (1)

Application Number Title Priority Date Filing Date
JP16513380A Granted JPS5789417A (en) 1980-11-22 1980-11-22 Switching method of bottom blowing gas of converter

Country Status (1)

Country Link
JP (1) JPS5789417A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH0288710A (en) * 1988-09-22 1990-03-28 Kawasaki Steel Corp Method for changing over process gas in metallurgical furnace

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH0288710A (en) * 1988-09-22 1990-03-28 Kawasaki Steel Corp Method for changing over process gas in metallurgical furnace

Also Published As

Publication number Publication date
JPS6151608B2 (en) 1986-11-10

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