JPS5757818A - Method for controlling changeover of gas of metal refining furnace - Google Patents

Method for controlling changeover of gas of metal refining furnace

Info

Publication number
JPS5757818A
JPS5757818A JP13158480A JP13158480A JPS5757818A JP S5757818 A JPS5757818 A JP S5757818A JP 13158480 A JP13158480 A JP 13158480A JP 13158480 A JP13158480 A JP 13158480A JP S5757818 A JPS5757818 A JP S5757818A
Authority
JP
Japan
Prior art keywords
gas
pressure
valve
valves
changeover
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
JP13158480A
Other languages
Japanese (ja)
Other versions
JPS6223044B2 (en
Inventor
Shozo Murakami
Mutsuo Nakajima
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 JP13158480A priority Critical patent/JPS5757818A/en
Publication of JPS5757818A publication Critical patent/JPS5757818A/en
Publication of JPS6223044B2 publication Critical patent/JPS6223044B2/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 eliminate excessive gaseous pressure and flow rate and lower the costs for gas changing and equipment by mutually differing and changing over the pressure set values of previously and succeedingly blowing gases while maintaining gas blowing of prescribed flow rates at the changeover of the gases. CONSTITUTION:Three kinds of gases are supplied via pressure control valves 14- 14'', and shutoff valves 15-15'' to the gas blowing tuyeres 12 in the bottom part of a bottom blown converter 11. Before the changeover of the gases, the valves 14', 15' for Ar which is the succeeding gas are fully shut, and the valve 15' is fully opened by a gas changeover command signal. An Ar control pressure set value is set slightly higher than that of the previous gas O2 and immediately the pressure controlling of the Ar system is started. Then, the valve 14' begins to open, and the pressure between he valves 16 and 24 after joining with the valves 14, 14' begins to rise gradually from the pressure before the gas changeover command. In accordance with this, the valve 14 begins to shut until it is fully shut. After the time T, the valve 15 is fully shut, the pressure controlling of the O2 system is stopped and the valve 14 is fixed in the full shut position. Further, the control pressure set value of Ar is lowered to an ordinary value, and this completes the gas changeover.
JP13158480A 1980-09-24 1980-09-24 Method for controlling changeover of gas of metal refining furnace Granted JPS5757818A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP13158480A JPS5757818A (en) 1980-09-24 1980-09-24 Method for controlling changeover of gas of metal refining furnace

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP13158480A JPS5757818A (en) 1980-09-24 1980-09-24 Method for controlling changeover of gas of metal refining furnace

Publications (2)

Publication Number Publication Date
JPS5757818A true JPS5757818A (en) 1982-04-07
JPS6223044B2 JPS6223044B2 (en) 1987-05-21

Family

ID=15061464

Family Applications (1)

Application Number Title Priority Date Filing Date
JP13158480A Granted JPS5757818A (en) 1980-09-24 1980-09-24 Method for controlling changeover of gas of metal refining furnace

Country Status (1)

Country Link
JP (1) JPS5757818A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS586918A (en) * 1981-07-02 1983-01-14 Kobe Steel Ltd Controller for gas blowing for bottom blowing to top and bottom blowing converter

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS586918A (en) * 1981-07-02 1983-01-14 Kobe Steel Ltd Controller for gas blowing for bottom blowing to top and bottom blowing converter
JPS6215606B2 (en) * 1981-07-02 1987-04-08 Kobe Steel Ltd

Also Published As

Publication number Publication date
JPS6223044B2 (en) 1987-05-21

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