GB1225404A - - Google Patents

Info

Publication number
GB1225404A
GB1225404A GB1225404DA GB1225404A GB 1225404 A GB1225404 A GB 1225404A GB 1225404D A GB1225404D A GB 1225404DA GB 1225404 A GB1225404 A GB 1225404A
Authority
GB
United Kingdom
Prior art keywords
metal
deoxidation
aluminium
chamber
deoxidized
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
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 filed Critical
Publication of GB1225404A publication Critical patent/GB1225404A/en
Expired legal-status Critical Current

Links

Classifications

    • C—CHEMISTRY; METALLURGY
    • C21—METALLURGY OF IRON
    • C21C—PROCESSING OF PIG-IRON, e.g. REFINING, MANUFACTURE OF WROUGHT-IRON OR STEEL; TREATMENT IN MOLTEN STATE OF FERROUS ALLOYS
    • C21C7/00—Treating molten ferrous alloys, e.g. steel, not covered by groups C21C1/00 - C21C5/00
    • C21C7/04—Removing impurities by adding a treating agent
    • C21C7/06—Deoxidising, e.g. killing

Landscapes

  • Chemical & Material Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Materials Engineering (AREA)
  • Metallurgy (AREA)
  • Organic Chemistry (AREA)
  • Treatment Of Steel In Its Molten State (AREA)
  • Manufacture And Refinement Of Metals (AREA)
  • Gas Separation By Absorption (AREA)

Abstract

1,225,404. Metal treatment Deoxidation. KAISER INDUSTRIES CORP. July 22, 1968 [Aug.3, 1967], No.34948/68. Heading C7D. Ferrous metal substantially free from oxygencontaining impurities is prepared by lowering the dissolved oxygen content in a preliminary deoxidation to not more than that given by the formula Log 10 %0 = 7640/T(‹ K)+2À84 and, if aluminium is used for this deoxidation, not more than that which is related to the aluminium present by the formula Log 10 [(%Al)<SP>2</SP>. (%O)<SP>4</SP>] = -79600/T (‹ K)+32À15, separating the preliminarily deoxidized metal from deoxidisation products and subjecting it to further treatment. The further treatment involves preparing a chamber lined with refractory containing 3À5% Feo or less which will not yield oxygen to molten metal containing aluminium as a deoxidizer, passing a non-oxygen-yielding gas into the chamber, adding a stoichiometric excess of aluminium over that theoretically required to deoxidized the metal, introducing the metal into the chamber, maintaining the chamber above the melting point of the metal until deoxidation has reduced dissolved oxygen in the metal to not more than 0À006% by weight and separating insoluble material from the deoxidized molten metal. Other agents such as hydrogen or carbon may be used for the preliminary deoxidation.
GB1225404D 1967-08-03 1968-07-22 Expired GB1225404A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US65816267A 1967-08-03 1967-08-03

Publications (1)

Publication Number Publication Date
GB1225404A true GB1225404A (en) 1971-03-17

Family

ID=24640162

Family Applications (1)

Application Number Title Priority Date Filing Date
GB1225404D Expired GB1225404A (en) 1967-08-03 1968-07-22

Country Status (4)

Country Link
BE (1) BE718960A (en)
DE (1) DE1758765A1 (en)
FR (1) FR1582227A (en)
GB (1) GB1225404A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2459836A1 (en) * 1979-06-27 1981-01-16 Uss Eng & Consult PROCESS FOR DEOXIDATION OF STEEL BY ADDITION OF ALUMINUM THEN INSUFFLATION OF ARGON

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2459836A1 (en) * 1979-06-27 1981-01-16 Uss Eng & Consult PROCESS FOR DEOXIDATION OF STEEL BY ADDITION OF ALUMINUM THEN INSUFFLATION OF ARGON

Also Published As

Publication number Publication date
BE718960A (en) 1969-01-16
DE1758765A1 (en) 1972-04-06
FR1582227A (en) 1969-09-26

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Legal Events

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