Specialized metallurgical processes – compositions for use therei – Processes – Producing or treating free metal
Patent
1996-11-06
1998-04-07
Andrews, Melvyn
Specialized metallurgical processes, compositions for use therei
Processes
Producing or treating free metal
75581, 75602, 75621, 75686, 75687, 75708, 266207, 266901, 420590, C22B 916
Patent
active
057359350
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.
REFERENCES:
patent: 5203910 (1993-04-01), Areaux et al.
patent: 5211744 (1993-05-01), Areaux et al.
Andrews Melvyn
Premelt Pump, Inc.
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