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Apparatus for gas treatment of molten metals

  • US 5,656,236 A
  • Filed: 09/09/1996
  • Issued: 08/12/1997
  • Est. Priority Date: 02/04/1994
  • Status: Expired due to Term
First Claim
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1. Apparatus for treating a molten metal with a treatment gas, comprising:

  • a container forming an elongated trough defining a channel for holding and conveying a molten metal, having a bottom wall and opposed side walls;

    at least one gas injector in use positioned in said container submerged in said metal;

    means for moving said gas injector selected from the group consisting of means for rotating said gas injector about a central vertical axis thereof, means for vibrating said gas injector, and means for oscillating said gas injector about a central vertical axis thereof; and

    means for conveying gas to said injector for injection into said metal;

    wherein a portion of said trough adapted for containing said molten metal has a transverse vertical cross-sectional area centred on each said injector and a maximum width at a midpoint of said injector, and wherein the product of said transverse vertical cross-sectional area and said maximum width does not exceed 0.2 m2.

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