Specialized metallurgical processes – compositions for use therei – Processes – Electrothermic processes
Patent
1977-03-22
1979-02-06
Andrews, M. J.
Specialized metallurgical processes, compositions for use therei
Processes
Electrothermic processes
75 63, 75 93R, C22B 2106
Patent
active
041382463
ABSTRACT:
The sodium content of aluminum melt is reduced efficiently to within acceptable limits by filtering the primary metal from the electrolytic cell through a loosely packed filter bed of granular material which in part comprises carbon. The treatment is carried out before alloy additions are made, and the temperature of the melt before entering the filter is higher than 780.degree. C.
REFERENCES:
patent: 3528801 (1970-09-01), Bylund et al.
patent: 3737304 (1973-06-01), Blayden et al.
patent: 3737305 (1973-06-01), Blayden et al.
patent: 3753690 (1973-08-01), Emley et al.
Bornand Jean-Daniel
Buxmann Kurt
Steinegger Alfred
Andrews M. J.
Bachman Robert H.
LaPointe Gregory P.
Swiss Aluminium Ltd.
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