GB776260A - Improved process for the reduction of iron ore - Google Patents

Improved process for the reduction of iron ore

Info

Publication number
GB776260A
GB776260A GB299755A GB299755A GB776260A GB 776260 A GB776260 A GB 776260A GB 299755 A GB299755 A GB 299755A GB 299755 A GB299755 A GB 299755A GB 776260 A GB776260 A GB 776260A
Authority
GB
United Kingdom
Prior art keywords
gas
reducing
hydrogen
furnace
zone
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
GB299755A
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.)
Norsk Hydro Elektrisk Kvaelstof AS
Original Assignee
Norsk Hydro Elektrisk Kvaelstof AS
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 Norsk Hydro Elektrisk Kvaelstof AS filed Critical Norsk Hydro Elektrisk Kvaelstof AS
Publication of GB776260A publication Critical patent/GB776260A/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
    • C21B13/026—Making spongy iron or liquid steel, by direct processes in shaft furnaces wherein iron or steel is obtained in a molten state heated electrically
    • 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
    • C21B13/0073—Selection or treatment of the reducing gases
    • C—CHEMISTRY; METALLURGY
    • C21—METALLURGY OF IRON
    • C21B—MANUFACTURE OF IRON OR STEEL
    • C21B13/00—Making spongy iron or liquid steel, by direct processes
    • C21B13/008—Use of special additives or fluxing agents
    • 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
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
    • Y02P10/00—Technologies related to metal processing
    • Y02P10/10—Reduction of greenhouse gas [GHG] emissions
    • Y02P10/122—Reduction of greenhouse gas [GHG] emissions by capturing or storing CO2
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
    • Y02P10/00—Technologies related to metal processing
    • Y02P10/10—Reduction of greenhouse gas [GHG] emissions
    • Y02P10/134—Reduction of greenhouse gas [GHG] emissions by avoiding CO2, e.g. using hydrogen

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)

Abstract

776,260. Reducing iron ores. NORSK HYDRO-ELEKTRISK KVAELSTOFAKTIESELS-KAB. Feb. 1, 1955 [Feb. 2, 1954], No. 2997/55. Class 72 In a process for the reduction of iron ores with a reducing gas consisting of hydrogen and carbon monoxide and having at least 50 per cent hydrogen, in a shaft furnace provided with electrical resistance heating, the waste gas being freed from water and carbon dioxide and recycled, fresh gas being supplied in such proportions of hydrogen and carbon monoxide that the recycled gas contains at least 50 per cent hydrogen, part of the sponge iron in the cold state-is added to the ore at the top of the furnace and fresh reducing gas is introduced into the reducing zone between a lower and an upper electrode. As shown a shaft furnace 1 has a pair of electrodes 2 which may be in the form of grids. Fresh gas may be added from an annular pipe 7 situated immediately below the upper electrode. The hot gas rises through a preheating zone A and is extracted at 9 at a temperature between 100 and 200‹C., after which water vapour and carbon dioxide are removed and the clean gas, which contains more than 50 per cent hydrogen, is returned to the bottom of the furnace where it cools the sponge iron produced arid it itself heated. Some of the sponge iron discharged from the furnace and is returned to the charging end and, together with the sponge iron formed in the zone A, improves the electrical conductivity in the reducing zone B. It is stated that the electric power used in the reducing prcoess is only that required to 'replace heat lost by radiation and to supply the heat required.for the endothermic reaction.
GB299755A 1954-02-02 1955-02-01 Improved process for the reduction of iron ore Expired GB776260A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
NO776260X 1954-02-02

Publications (1)

Publication Number Publication Date
GB776260A true GB776260A (en) 1957-06-05

Family

ID=19907006

Family Applications (1)

Application Number Title Priority Date Filing Date
GB299755A Expired GB776260A (en) 1954-02-02 1955-02-01 Improved process for the reduction of iron ore

Country Status (1)

Country Link
GB (1) GB776260A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN106676220A (en) * 2016-12-15 2017-05-17 江苏省冶金设计院有限公司 Gas base shaft furnace for preparing sponge iron by cold-solidified pellets and method thereof

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN106676220A (en) * 2016-12-15 2017-05-17 江苏省冶金设计院有限公司 Gas base shaft furnace for preparing sponge iron by cold-solidified pellets and method thereof

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