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Gas injection apparatus

  • US 4,169,584 A
  • Filed: 08/18/1978
  • Issued: 10/02/1979
  • Est. Priority Date: 07/18/1977
  • Status: Expired due to Term
First Claim
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1. A gas injection apparatus for introducing gas into molten metal, comprising:

  • (1) a reverberatory furnace;

    (2) means within said reverberatory furnace for pumping metal through a metal transfer conduit, said pumping means having a pumping capacity of at least 4000 lbs/min, said metal transfer conduit being at least partially submerged in a metallic bath;

    (3) a two-ended gas injection conduit having one end submerged within the metallic bath and connected to the metal transfer conduit, the gas injection conduit being so constructed and arranged that the metal is pumped past the submerged end of the gas injection conduit so as to contact the gas within the gas injection conduit connected to the metal transfer conduit, the gas injection conduit having an unsubmerged end opposite the submerged end of the gas injection conduit; and

    (4) means for providing gas to be introduced into the molten metal into the unsubmerged end of the gas injection conduit.

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