GB1468450A - - Google Patents

Info

Publication number
GB1468450A
GB1468450A GB3946174A GB3946174A GB1468450A GB 1468450 A GB1468450 A GB 1468450A GB 3946174 A GB3946174 A GB 3946174A GB 3946174 A GB3946174 A GB 3946174A GB 1468450 A GB1468450 A GB 1468450A
Authority
GB
United Kingdom
Prior art keywords
molten metal
metal
converter
steel
iron
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
GB3946174A
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
Priority claimed from SE7316039A external-priority patent/SE397100B/en
Priority claimed from SE7406840A external-priority patent/SE397203B/en
Priority claimed from SE7407845A external-priority patent/SE401199B/en
Application filed filed Critical
Publication of GB1468450A publication Critical patent/GB1468450A/en
Expired legal-status Critical Current

Links

Classifications

    • CCHEMISTRY; METALLURGY
    • C21METALLURGY OF IRON
    • C21CPROCESSING OF PIG-IRON, e.g. REFINING, MANUFACTURE OF WROUGHT-IRON OR STEEL; TREATMENT IN MOLTEN STATE OF FERROUS ALLOYS
    • C21C5/00Manufacture of carbon-steel, e.g. plain mild steel, medium carbon steel or cast steel or stainless steel
    • C21C5/56Manufacture of steel by other methods
    • CCHEMISTRY; METALLURGY
    • C21METALLURGY OF IRON
    • C21BMANUFACTURE OF IRON OR STEEL
    • C21B13/00Making spongy iron or liquid steel, by direct processes
    • C21B13/0006Making spongy iron or liquid steel, by direct processes obtaining iron or steel in a molten state
    • C21B13/0013Making spongy iron or liquid steel, by direct processes obtaining iron or steel in a molten state introduction of iron oxide into a bath of molten iron containing a carbon reductant

Landscapes

  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Manufacturing & Machinery (AREA)
  • Materials Engineering (AREA)
  • Metallurgy (AREA)
  • Organic Chemistry (AREA)
  • Treatment Of Steel In Its Molten State (AREA)

Abstract

1468450 Producing steel, steel alloy or iron from oxides. UDDEHOLMS AB 10 Sept 1974 [28 Nov 1973 3 April 1974 (2) 22 May 1974 14 June 1974] 39461/74 Heading C7D A metal oxide is reduced to metal by reaction with a reducing agent in a body of molten metal by introducing metal into a converter 1 through a melting zone spaced from the converter and having at least one channel 8 opening into the deepest region of the converter below the molten metal surface and electric induction heating means e.g. windings 12, a temperature gradient being established in the molten metal between the melting zone and the converter thereby forcing the hotter metal from the melting zone out into the deepest region of the converter, introducing the metal oxide suspended in a carrier gas into the molten metal body below its surface through at least one tuyere 14 directed towards the channnel 8 to bring about replacement of the hotter metal in the deepest region by colder metal from other parts, and removing molten metal e.g. via tap hole 15 from the converter. For producing iron or steel the oxide may be haematite and/or magnetite ore concentrate, and the molten metal may be pig iron or steel, a stoichiometric mixture of C or carbonaceous material and ore concentrate suspended in the carrier gas being injected into the molten metal body. For unalloyed steel the molten metal temperature is 1480 to 1550‹C; for producing alloyed steel, the suspension injected may include powdered magnetite, chromite, to yield e.g. 1À1% Cr, and scheelite, to yield e.g. 2À5% W. CaO may be present in the suspension for eliminating S. The C e.g. coal or coke powder may be injected through the tuyere and/or supplied on top via port 17; alternatively fuel oil or hydrogen gas may be supplied. Addititionally iron oxide pellets may be supplied from above. The carrier gas may be air, hydrocarbon gas, or argon and/or steam. Once the desired C content has been achieved, the converter atmosphere may be replaced by argon, the temperature raised by continued air blowing through the tuyere, the slag removed and the molten metal tapped for vaccuum refining.
GB3946174A 1973-11-28 1974-09-10 Expired GB1468450A (en)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
SE7316039A SE397100B (en) 1973-11-28 1973-11-28 METAL OXIDITY REDUCTION KIT ACCORDING TO 7306894-2
SE7406840A SE397203B (en) 1974-05-22 1974-05-22 METAL OXIDITY REDUCTION KIT ACCORDING TO 7306894-2
SE7407845A SE401199B (en) 1974-06-14 1974-06-14 KIT FOR MANUFACTURE OF STAINLESS STEEL ACCORDING TO PATENT 7316039-2

Publications (1)

Publication Number Publication Date
GB1468450A true GB1468450A (en) 1977-03-23

Family

ID=27355060

Family Applications (1)

Application Number Title Priority Date Filing Date
GB3946174A Expired GB1468450A (en) 1973-11-28 1974-09-10

Country Status (1)

Country Link
GB (1) GB1468450A (en)

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Legal Events

Date Code Title Description
PS Patent sealed
PCNP Patent ceased through non-payment of renewal fee