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Rotary degasser

  • US 5,678,807 A
  • Filed: 06/13/1995
  • Issued: 10/21/1997
  • Est. Priority Date: 06/13/1995
  • Status: Expired due to Term
First Claim
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1. A device for introducing gas into molten metal, said device including:

  • a) a degasser shaft, said shaft comprising a gas-transfer conduit;

    b) an impeller block connected to said degasser shaft, said impeller block having a gas inlet communicating with said gas-transfer conduit and at least one metal-transfer recess formed therein;

    c) at least one gas-release opening formed in each of said recesses; and

    d) a coupling connected to said degasser shaft;

    whereby said device is positioned in a molten metal bath and said degasser shaft is connected to a drive source by said coupling;

    the drive source turns the degasser shaft and the impeller block, the impeller block thereby displacing the molten metal substantially entirely radially and simultaneously, gas is introduced into said conduit whereby it passes into the gas inlet and out of the gas-release opening(s) where it is sheared by the molten metal being displaced by the recess.

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