Method for use of inert gas bubble-actuated molten metal pump in a well of a metal-melting furnace and the furnace
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United States of America Patent
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Apr 7, 1998
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N/A
app pub date -
Nov 6, 1996
filing date -
Nov 6, 1996
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Abstract
An inert gas bubble-actuated molten metal pump is located in a metal-melting furnace to effect circulation of molten metal throughout the furnace. The inert gas employed to actuate the molten metal pump is captured beneath a heat-resistant and flame-resistant cover located above the exit port of the pump and over a substantial portion of the molten metal, thereby to prevent splashing, spattering, and disruption of a thin protective layer or skin of oxidized metal at the surface of the molten metal as well as to provide a non-oxidizing atmosphere at the surface of the molten metal beneath said cover. In this manner and by this combination, the inert gas is employed most efficiently and economically.
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