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Apparatus for treating a bath of liquid metal by injecting gas

  • US 4,372,541 A
  • Filed: 09/21/1981
  • Issued: 02/08/1983
  • Est. Priority Date: 10/14/1980
  • Status: Expired due to Fees
First Claim
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1. Apparatus for treating a bath of liquid metal by injection of a gas comprising a container for housing the liquid metal, a gas injection plug at the bottom of the container, an agitator mounted for rotational movement within the container, means mounting the agitator for vertical movement in the direction toward and away from the plug between rest position on the gas injection plug and raised position spaced from the gas injection plug responsive to gas emission from the plug, whereby the agitator is supported in raised position by a fluid bearing to enable rotational movement of the agitator in raised position while allowing a multitude of dispersed bubbles of the gas to escape through the space between the separated agitator and plug, and means for rotating the agitator about the axis.

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