JPS5729507A - Control of flow of reducing gas in blast furnace - Google Patents

Control of flow of reducing gas in blast furnace

Info

Publication number
JPS5729507A
JPS5729507A JP10365080A JP10365080A JPS5729507A JP S5729507 A JPS5729507 A JP S5729507A JP 10365080 A JP10365080 A JP 10365080A JP 10365080 A JP10365080 A JP 10365080A JP S5729507 A JPS5729507 A JP S5729507A
Authority
JP
Japan
Prior art keywords
slurry
blast furnace
water
reducing gas
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.)
Pending
Application number
JP10365080A
Other languages
Japanese (ja)
Inventor
Kinichi Sugawara
Tatsuya Kimura
Mutsumitsu Odera
Norio Kotabe
Hiroyuki Ishimatsu
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 JP10365080A priority Critical patent/JPS5729507A/en
Publication of JPS5729507A publication Critical patent/JPS5729507A/en
Pending 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
    • C21B5/001—Injecting additional fuel or reducing agents
    • C21B5/003—Injection of pulverulent coal
    • C21B5/004—Injection of slurries

Landscapes

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

Abstract

PURPOSE:To enable to arbitrarily control the radial distribution of the flow of a reducing gas in a blast furnace by a method wherein the water content of a slurry of pulverized coal is changed within a specified range and the slurry is blown into a blast furnace as an auxiliary fuel. CONSTITUTION:A surface active agent and water are supplied into an adjusting tank 3 from a supplying tank 1 for the surface active agent and a feed water supply pipe 2, respectively, and they are mixed with each other. The resulting aqueous solution and pulverized coal fed from a pulverized coal supplying device 4 are mixed with each other by stirring them in a mixing and storing tank 5 to prepare the slurry. The slurry is fed into a slurry supplying tank 8 and is stored. The water content of the slurry is adjusted to be within the range of 20-40wt% by adding water from a feed water supply pipe 9 as required, and then the slurry is blown into a blowing subpipe 13 through a nozzle 12 by a pressure feed pump 11. The water contained in the slurry is evaporated by hot air in the subpipe 13, while the thus dewatered slurry is injected into the furnace through a tuyere 14 and is burned. By the adjustment of the water content of the slurry, the depth of a raceway is controlled, the distribution of the flow of the reducing gas can be modified without controlling the distribution of materials charged via the top of the furnace, and a stable operation of the blast furnace can be accomplished.
JP10365080A 1980-07-30 1980-07-30 Control of flow of reducing gas in blast furnace Pending JPS5729507A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP10365080A JPS5729507A (en) 1980-07-30 1980-07-30 Control of flow of reducing gas in blast furnace

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP10365080A JPS5729507A (en) 1980-07-30 1980-07-30 Control of flow of reducing gas in blast furnace

Publications (1)

Publication Number Publication Date
JPS5729507A true JPS5729507A (en) 1982-02-17

Family

ID=14359645

Family Applications (1)

Application Number Title Priority Date Filing Date
JP10365080A Pending JPS5729507A (en) 1980-07-30 1980-07-30 Control of flow of reducing gas in blast furnace

Country Status (1)

Country Link
JP (1) JPS5729507A (en)

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS6357705A (en) * 1986-08-27 1988-03-12 Nippon Kokan Kk <Nkk> Operation of blast furnace
KR100389240B1 (en) * 2000-09-08 2003-06-27 주식회사 포스코 Gas density control method of blast furnace bottom
WO2015164902A1 (en) * 2014-05-01 2015-11-05 Glencore Technology Pty Limited Method of operating a furnace
CN109022650A (en) * 2018-09-29 2018-12-18 武汉钢铁有限公司 A kind of recognition methods of upper blast furnace gas fluid distrbution

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS6357705A (en) * 1986-08-27 1988-03-12 Nippon Kokan Kk <Nkk> Operation of blast furnace
KR100389240B1 (en) * 2000-09-08 2003-06-27 주식회사 포스코 Gas density control method of blast furnace bottom
WO2015164902A1 (en) * 2014-05-01 2015-11-05 Glencore Technology Pty Limited Method of operating a furnace
CN109022650A (en) * 2018-09-29 2018-12-18 武汉钢铁有限公司 A kind of recognition methods of upper blast furnace gas fluid distrbution

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