JPS56116815A - Controlling method of switching of bottom blowing gas in metal refining furnace - Google Patents

Controlling method of switching of bottom blowing gas in metal refining furnace

Info

Publication number
JPS56116815A
JPS56116815A JP1742980A JP1742980A JPS56116815A JP S56116815 A JPS56116815 A JP S56116815A JP 1742980 A JP1742980 A JP 1742980A JP 1742980 A JP1742980 A JP 1742980A JP S56116815 A JPS56116815 A JP S56116815A
Authority
JP
Japan
Prior art keywords
gas
time
switching
valve
flow
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
JP1742980A
Other languages
Japanese (ja)
Other versions
JPS6136051B2 (en
Inventor
Shozo Murakami
Mutsuo Nakajima
Toshihiro Murata
Isao Saitou
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 JP1742980A priority Critical patent/JPS56116815A/en
Publication of JPS56116815A publication Critical patent/JPS56116815A/en
Publication of JPS6136051B2 publication Critical patent/JPS6136051B2/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 maintain a minimum of total gas flow at switching time, by a method wherein gas is switched from the preceding gas to the following, using a valve opening that provides a minimum flow to prevent molten steel from entering the tuyere, and under a virtual condition that there is no mushroom at each end of the tuyere. CONSTITUTION:The preceding gas A is maintained at a constant flow rate up to time e; and in order to switch it to the following gas B, the valve of the preceding gas A is reduced, at time f, to the specified opening at which molten metal does not enter the tuyere, if mushroom drops. At time g, the valve of the following gas B is made to the specified opening, then, at time h, each gas flow becomes nearly the same, and total flow reaches a peak. Then, a time g, the valve of the preceding gas A is closed and, at time j, the flow rate of the preceding gas A is made to 0. At this time, the valve of the following gas B is maintained at the specified opening, so that following gas B also corresponds. At time k, the bollowing gas B is controlled to the flow that meets the requirement of flowing operation after switching gas, and gas switching is completed.
JP1742980A 1980-02-15 1980-02-15 Controlling method of switching of bottom blowing gas in metal refining furnace Granted JPS56116815A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP1742980A JPS56116815A (en) 1980-02-15 1980-02-15 Controlling method of switching of bottom blowing gas in metal refining furnace

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP1742980A JPS56116815A (en) 1980-02-15 1980-02-15 Controlling method of switching of bottom blowing gas in metal refining furnace

Publications (2)

Publication Number Publication Date
JPS56116815A true JPS56116815A (en) 1981-09-12
JPS6136051B2 JPS6136051B2 (en) 1986-08-16

Family

ID=11943766

Family Applications (1)

Application Number Title Priority Date Filing Date
JP1742980A Granted JPS56116815A (en) 1980-02-15 1980-02-15 Controlling method of switching of bottom blowing gas in metal refining furnace

Country Status (1)

Country Link
JP (1) JPS56116815A (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS58185710A (en) * 1982-04-22 1983-10-29 Kawasaki Steel Corp System for switching gas in bottom blown converter
JPH04276008A (en) * 1991-03-01 1992-10-01 Nippon Steel Corp Method for operating bottom blowing converter

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS58185710A (en) * 1982-04-22 1983-10-29 Kawasaki Steel Corp System for switching gas in bottom blown converter
JPS6221846B2 (en) * 1982-04-22 1987-05-14 Kawasaki Seitetsu Kk
JPH04276008A (en) * 1991-03-01 1992-10-01 Nippon Steel Corp Method for operating bottom blowing converter

Also Published As

Publication number Publication date
JPS6136051B2 (en) 1986-08-16

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