Specialized metallurgical processes – compositions for use therei – Processes – Free metal or alloy reductant contains magnesium
Patent
1995-06-05
1997-08-26
Andrews, Melvyn
Specialized metallurgical processes, compositions for use therei
Processes
Free metal or alloy reductant contains magnesium
75681, 75708, C22B 2106
Patent
active
056606141
ABSTRACT:
A method of and apparatus for treating molten metal to achieve effective removal of such unwanted inclusions as gases, alkali metals, entrained solids, and the like. The method comprises continuously introducing molten metal into a container forming a trough or trough section, such as the trough provided between a melting furnace and a casting machine, providing at least one mechanically movable gas dispenser submerged within the metal in the container and introducing a gas into the metal adjacent to the gas disperser in a part of the trough forming a treatment zone such that the gas is broken into smaller bubbles by the gas dispenser and dispersed through the treatment zone. The trough or trough section is such that it exhibits a static to dynamic metal holdup of less than 50%.
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patent: 4290590 (1981-09-01), Montgrain
patent: 4372541 (1983-02-01), Bocourt et al.
patent: 5160693 (1992-11-01), Eckert et al.
patent: 5527381 (1996-06-01), Waite et al.
332 Giesseri, vol. 81, No. 14, Jul. 1994 Dusseldorf, DE. pp. 478-483, XP 000457409. Reinigung von Aluminiumiumschmelzen by Wolfgang Schneider of Bonn, pp. 479-480--Translation only.
The Use of Rotating-Impeller Gas Injection in Aluminum Processing, Christophe Leroy and Gerard Pignault, JOM, 43(1991) Sep., No. 9, Warrendale, PA, USA.
Dube Ghyslain
Dumont Robert
Lavoie Serge Eugene
Waite Peter D.
Alcan International Limited
Andrews Melvyn
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