Aluminum smelting temperature selection

Details Aluminum smelting temperature selection Aluminum smelting temperature selection

1975-03-07

1976-04-20

Edmundson, F. C.

Chemistry: electrical and wave energy

Processes and products

C25C 306, C25C 318

Patent

active

039517632

ABSTRACT:
A process for producing aluminum in which alumina is decomposed electrolytically to aluminum metal in an electrolyte bath between an anode and a cathodic interface formed between aluminum metal and the electrolyte bath. The bath consists essentially of Al.sub.2 O.sub.3, NaF, and AlF.sub.3, and has a weight ratio NaF to AlF.sub.3 up to 1.1:1. During decomposition, the bath is maintained at an operating temperature greater than 40.degree.C above the cryolite liquidus temperature of the bath and effective for preventing bath crusting in interfacial areas between bath and aluminum metal.

REFERENCES:
patent: 2915443 (1959-12-01), Wallace et al.
Gadeau, Bull. Soc. Franc Electriciens, Ser. 6, Vol. VII, No. 74, pp. 540-544, 1947.
Antipin et al., Metallurgizdat, 1954, pp. 250, 251.
Rolin, Bull. Soc. Chim. de France, 1961, pp. 1112-1125.

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