JPS5558307A - Blasting method for blast furnace - Google Patents

Blasting method for blast furnace

Info

Publication number
JPS5558307A
JPS5558307A JP13122178A JP13122178A JPS5558307A JP S5558307 A JPS5558307 A JP S5558307A JP 13122178 A JP13122178 A JP 13122178A JP 13122178 A JP13122178 A JP 13122178A JP S5558307 A JPS5558307 A JP S5558307A
Authority
JP
Japan
Prior art keywords
closed
tuyeres
tuyere
furnace
nos
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
JP13122178A
Other languages
Japanese (ja)
Other versions
JPS5739281B2 (en
Inventor
Yoshimasa Kajiwara
Koji Oki
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
Sumitomo Metal Industries Ltd
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 Sumitomo Metal Industries Ltd filed Critical Sumitomo Metal Industries Ltd
Priority to JP13122178A priority Critical patent/JPS5558307A/en
Publication of JPS5558307A publication Critical patent/JPS5558307A/en
Publication of JPS5739281B2 publication Critical patent/JPS5739281B2/ja
Granted legal-status Critical Current

Links

Classifications

    • C—CHEMISTRY; METALLURGY
    • C21—METALLURGY OF IRON
    • C21B—MANUFACTURE OF IRON OR STEEL
    • C21B5/00—Making pig-iron in the blast furnace

Landscapes

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

Abstract

PURPOSE:To stabilize the furnace condition over a long period of time by holding a fixed number of adjoining tuyere groups closed while the production is being reduced and moving these closed tuyere groups in their circumferential direction before inert zones are formed. CONSTITUTION:While the production with the blast furnace is under cutback, a fixed number of tuyeres adjoining to the tuyeres disposed in the circumferential direction in the furnace, e.g., Nos. 1-5 are held fully closed and the remaining ones are held open. Inert zones are forecast with the thermometers provided to the furnace body and before the inert zones by the closed tuyerse are formed, the closed tuyeres are moved two pieces each sequentially in the circumferential direction, thus air is blasted by closing the Nos. 6, 7 tuyeres and changing over the Nos. 1,2 tuyeres in the rear part of the moving direction to open tuyeres. In this way, the closed tuyere groups are moved at the specified date-number pitch in the clockwise rotating direction. Here, the number of the tuyeres to be selectively opened and closed out of the closed tuyeres is desirably 30-40% of the closed tuyere groups. By this method, the blast furnace is operated in a stable state and the frequencies of tuyere breakages are suppressed.
JP13122178A 1978-10-25 1978-10-25 Blasting method for blast furnace Granted JPS5558307A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP13122178A JPS5558307A (en) 1978-10-25 1978-10-25 Blasting method for blast furnace

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP13122178A JPS5558307A (en) 1978-10-25 1978-10-25 Blasting method for blast furnace

Publications (2)

Publication Number Publication Date
JPS5558307A true JPS5558307A (en) 1980-05-01
JPS5739281B2 JPS5739281B2 (en) 1982-08-20

Family

ID=15052856

Family Applications (1)

Application Number Title Priority Date Filing Date
JP13122178A Granted JPS5558307A (en) 1978-10-25 1978-10-25 Blasting method for blast furnace

Country Status (1)

Country Link
JP (1) JPS5558307A (en)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0992753A2 (en) * 1998-08-04 2000-04-12 Linde Aktiengesellschaft Operating process for a shaft furnace and shaft furnace
EP1035392A2 (en) * 1999-03-05 2000-09-13 Linde Technische Gase GmbH Shaft furnace operating method
EP1035221A2 (en) * 1999-03-05 2000-09-13 Linde Technische Gase GmbH Burner, shaft furnace and shaft furnace operating method

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0992753A2 (en) * 1998-08-04 2000-04-12 Linde Aktiengesellschaft Operating process for a shaft furnace and shaft furnace
EP0992753A3 (en) * 1998-08-04 2001-08-08 Linde Gas Aktiengesellschaft Operating process for a shaft furnace and shaft furnace
EP1035392A2 (en) * 1999-03-05 2000-09-13 Linde Technische Gase GmbH Shaft furnace operating method
EP1035221A2 (en) * 1999-03-05 2000-09-13 Linde Technische Gase GmbH Burner, shaft furnace and shaft furnace operating method
EP1035392A3 (en) * 1999-03-05 2002-12-11 Linde AG Shaft furnace operating method
EP1035221A3 (en) * 1999-03-05 2003-11-19 Linde AG Burner, shaft furnace and shaft furnace operating method

Also Published As

Publication number Publication date
JPS5739281B2 (en) 1982-08-20

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