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GB1333846A - Method of operaing a furnace with prereduced pellets of ore - Google Patents

Method of operaing a furnace with prereduced pellets of ore

Info

Publication number
GB1333846A
GB1333846A GB2346571A GB2346571A GB1333846A GB 1333846 A GB1333846 A GB 1333846A GB 2346571 A GB2346571 A GB 2346571A GB 2346571 A GB2346571 A GB 2346571A GB 1333846 A GB1333846 A GB 1333846A
Authority
GB
United Kingdom
Prior art keywords
furnace
gas
smelting
blown
iron ore
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.)
Expired
Application number
GB2346571A
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.)
JFE Engineering Corp
Original Assignee
Nippon Kokan 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 Nippon Kokan Ltd filed Critical Nippon Kokan Ltd
Publication of GB1333846A publication Critical patent/GB1333846A/en
Expired legal-status Critical Current

Links

Classifications

    • C—CHEMISTRY; METALLURGY
    • C21—METALLURGY OF IRON
    • C21B—MANUFACTURE OF IRON OR STEEL
    • C21B13/00—Making spongy iron or liquid steel, by direct processes
    • C21B13/02—Making spongy iron or liquid steel, by direct processes in shaft furnaces
    • C21B13/023—Making spongy iron or liquid steel, by direct processes in shaft furnaces wherein iron or steel is obtained in a molten state
    • C—CHEMISTRY; METALLURGY
    • C21—METALLURGY OF IRON
    • C21B—MANUFACTURE OF IRON OR STEEL
    • C21B13/00—Making spongy iron or liquid steel, by direct processes
    • C21B13/0046—Making spongy iron or liquid steel, by direct processes making metallised agglomerates or iron oxide
    • C—CHEMISTRY; METALLURGY
    • C21—METALLURGY OF IRON
    • C21B—MANUFACTURE OF IRON OR STEEL
    • C21B13/00—Making spongy iron or liquid steel, by direct processes
    • C21B13/12—Making spongy iron or liquid steel, by direct processes in electric furnaces
    • 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

Landscapes

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

Abstract

1333846 Smelting iron ore NIPPON KOKAN KK 19 April 1971 [26 Feb 1970] 23465/71 Heading C7D A process for smelting pre-reduced pelleted iron ore comprises blowing a non-oxidizing gas through the smelter charge, the temperature of the gas being at least as high as that of the charge at the points where the gas is blown into the furnace. The blowing of the gas increases the available heat capacity of the furnace and thus thermally stabilzes the furnace when operating with lowered coke/hot metal ratios. The non-oxidizing gas may be nitrogen, carbon monoxide, mixtures containing them, or waste gases from combustion, and is blown into positions above the tuyeres at temperatures above 800‹C. preferably between 850 and 1200‹C. Apart from preventing undesirable cooling in the upper portions of blast or shaft furnaces, the invention is also applicable to cupola or electric smelting furnaces. The pellets may be combined with scrap metal.
GB2346571A 1970-02-26 1971-04-19 Method of operaing a furnace with prereduced pellets of ore Expired GB1333846A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP1590870A JPS5022966B1 (en) 1970-02-26 1970-02-26

Publications (1)

Publication Number Publication Date
GB1333846A true GB1333846A (en) 1973-10-17

Family

ID=11901856

Family Applications (1)

Application Number Title Priority Date Filing Date
GB2346571A Expired GB1333846A (en) 1970-02-26 1971-04-19 Method of operaing a furnace with prereduced pellets of ore

Country Status (3)

Country Link
JP (1) JPS5022966B1 (en)
FR (1) FR2079120A5 (en)
GB (1) GB1333846A (en)

Also Published As

Publication number Publication date
DE2109316A1 (en) 1971-09-09
JPS5022966B1 (en) 1975-08-04
FR2079120A5 (en) 1971-11-05
DE2109316B2 (en) 1976-07-29

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Legal Events

Date Code Title Description
429A Application made for amendment of specification (sect. 29/1949)
429H Application (made) for amendment of specification now open to opposition (sect. 29/1949)
429D Case decided by the comptroller ** specification amended (sect. 29/1949)
PS Patent sealed
PCNP Patent ceased through non-payment of renewal fee