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Lid and containment vessel for refining molten metal

  • US 5,718,416 A
  • Filed: 01/30/1996
  • Issued: 02/17/1998
  • Est. Priority Date: 01/30/1996
  • Status: Expired due to Fees
First Claim
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1. A dome lid assembly for use in combination with a molten metal refinement tub to form a containment vessel, the containment vessel being for use in combination with one or more rotary gas dispersion device to refine molten metal, the dome lid assembly comprising:

  • a. a lid body, comprised of;

    i. four outer lid walls which form a lower outer surface which corresponds and attaches to an upper outer surface of a tub assembly;

    ii. a roof which is integral with the four outer lid walls and which together form an interior cavity, the roof being elevated from lower ends of the four outer lid walls, and the roof including openings for receiving one or more rotary gas dispersion devices;

    wherein the interior volume of the four outer lid walls and the roof is four cubic feet or more;

    b. an access door to the interior cavity through two or more of the four outer walls;

    c. a gas inlet port through the lid body; and

    d. a gas outlet port through the lid body.

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