Specialized metallurgical processes – compositions for use therei – Processes – Producing or treating free metal
Patent
1997-12-10
1999-04-06
Andrews, Melvyn
Specialized metallurgical processes, compositions for use therei
Processes
Producing or treating free metal
75411, C22B 1514
Patent
active
058912150
ABSTRACT:
Molten metal (e.g., on its way to a continuous casting machine for forming a bar that will be rolled into a rod to be drawn down to wire) is filtered to remove particulate impurities by passing it through at least one and preferably several ceramic filters. In addition, the molten metal is degassed by injecting a flushing gas into the metal through one or more porous plugs in the bottom of the chamber through which the molten metal flows. A partial vacuum column above each porous plug is used to help pull gas up through and out of the metal.
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patent: 4472195 (1984-09-01), Gupta et al.
patent: 4515630 (1985-05-01), Tyler et al.
patent: 5037471 (1991-08-01), Iwamura et al.
patent: 5183486 (1993-02-01), Gatten et al.
Meseha George M.
Tavares Fausto
Andrews Melvyn
Phelps Dodge Industries, Inc.
Treyz G. Victor
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