Apparatus for degassing molten metal
AssigneeSwiss Aluminium Ltd.
InventorJoseph A. Clumpner
Life of this patent
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Abstract
A gas injection nozzle design for use in a swirling tank reactor used in the degassing of molten metal with a fluxing gas. The nozzle design eliminates metal leakage from the reactor around the nozzle tip and gas leakage within the fluxing gas delivery line. The nozzle tip is provided with an orifice profile consisting of a straight hole opening of constant diameter or consisting of a converging-diverging profile.
Claims11
An apparatus for use in the degassing of molten metal which comprises:
- a chamber having an inner elongated sidewall portion, an outer elongated sidewall portion and a central axis;
- metal inlet means positioned at a first height and tangentially located with respect to said chamber for tangentially introducing molten metal into said chamber such that said molten metal swirlingly flows from said molten metal inlet down through said chamber;
- metal outlet means positioned at a second height below said first height for removing molten metal from said chamber;
- and
- at least two fluxing gas inlet means mounted in said first inner elongated sidewall portion below said first height at different radial distances from said central axis of said chamber for introducing fluxing gas into said chamber.
A nozzle assembly comprising a nozzle blank, a screw assembly having an undercut portion, a seal provided in said undercut portion of said screw assembly and a nut wherein said undercut portion of said screw assembly abuts the nozzle blank in sealing relationship therewith and is secured to said nozzle blank by said nut.
Dependencies are inferred from the claim text.