Process for the removal of impurities from aluminum melts

Details Process for the removal of impurities from aluminum melts Process for the removal of impurities from aluminum melts

1977-11-21

1979-02-06

Andrews, M. J.

Specialized metallurgical processes, compositions for use therei

Processes

Electrothermic processes

75 93R, C22B 2100

Patent

active

041382455

ABSTRACT:
Sodium is removed from aluminum by introducing a gaseous chlorinating agent for molten aluminum into a body of molten aluminum which has a content of sodium and passing the resulting mixture through a filter which carries a liquid metal chloride coating and which is able to chemisorb aluminum chloride which forms. As a result of this combined gas and filter treatment sodium chloride forms and adheres to the filter surface thus reducing the amount of sodium in the melt.

REFERENCES:
patent: 3753690 (1973-08-01), Emley et al.
patent: 4052198 (1977-10-01), Yarwood

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