Specialized metallurgical processes – compositions for use therei – Processes – Electrothermic processes
Patent
1989-12-14
1991-07-16
Andrews, Melvyn J.
Specialized metallurgical processes, compositions for use therei
Processes
Electrothermic processes
75687, 75685, C22B 402
Patent
active
050321714
ABSTRACT:
A method for removing dissolved alkali metals and alkaline earth metals from aluminum is disclosed. The method comprises providing a body of molten aluminum containing the alkali metal and alkaline earth metals in a container and inductively moving the molten aluminum in upper regions of the body in a generally downward direction at outward regions of the body and in a generally upward direction in inner regions of the body. Fluoride values are added to the body to react with the alkali metals or alkaline earth metals.
REFERENCES:
patent: 4571258 (1986-02-01), Bamji et al.
Gorss Jeffrey B.
Gutknecht Robert A.
Robare Thomas J.
Semk J. Richard
Alexander Andrew
Aluminum Company of America
Andrews Melvyn J.
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