Dispersing gas into molten metal

  • US 4,898,367 A
  • Filed: 07/22/1988
  • Issued: 02/06/1990
  • Est. Priority Date: 07/22/1988
  • Status: Expired due to Term
First Claim
Patent Images

1. Apparatus for dispersing gas into molten metal, comprising:

  • an impeller in the form of a rectangular prism having upper and lower faces, a width (A), a depth (B), and a height (C), with (A) being equal to (B), the impeller having a gas discharge outlet opening through the lower face of the prism;

    an elongate, rotatable shaft rigidly connected to the impeller and projecting from the upper face of the impeller; and

    means for conveying gas to the gas discharge outlet, whereby gas to be dispersed into molten metal can be pumped along the lower face of the impeller.

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