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Jet flow device for injecting gas into molten metal and process

  • US 5,340,379 A
  • Filed: 04/09/1993
  • Issued: 08/23/1994
  • Est. Priority Date: 11/09/1990
  • Status: Expired due to Fees
First Claim
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1. A device for injecting gas into molten metal in a furnace chamber comprising:

  • (a) a stirring apparatus having a reservoir chamber separate from the furnace chamber, a connector portion with an orifice connecting the interior of the furnace and the reservoir for the passage of the molten metal between them through the connector portion, vacuum/pressure generating means connected to the reservoir chamber interior for alternatively and successively producing therein a vacuum for drawing molten metal into its interior from the furnace chamber and a positive pressure for expelling the molten metal therefrom into the furnace chamber through the orifice in the form of a high velocity stirring jet, and(b) gas injector tube adapted to inject gas into the high velocity stirring jet emerging from the orifice in an axial core region thereof of maximum velocity such that the gas is broken down into a large number of small bubbles which are circulated throughout the furnace chamber with the stirring jet.

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