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

1979-03-13

Andrews, M. J.

Specialized metallurgical processes, compositions for use therei

Processes

Electrothermic processes

75 63, 75 93R, C22B 2106

Patent

active

041440544

ABSTRACT:
The process for removing impurities, in particular for removing sodium chloride from aluminum melts, employs reactive chlorine which is introduced into the melt and then passes with the melt through a filter bed. Aluminum chloride formed by the reaction of the chlorine with the melt is chemisorbed on the chloride or group of alkali or alkali earth chlorides in the filter and the sodium in solution in the melt is in turn chemisorbed on the aluminum chloride thus reducing the sodium content of the melt.

REFERENCES:
patent: 3753690 (1973-08-01), Emley et al.
patent: 3907962 (1975-09-01), Ogiso

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