Apparatus and methods for the electrolytic production of aluminu

Details Apparatus and methods for the electrolytic production of aluminu Apparatus and methods for the electrolytic production of aluminu

1978-07-14

1981-03-24

Williams, Howard S.

Chemistry: electrical and wave energy

Processes and products

204245, 204284, 204285, C25B 1103, C25C 306

Patent

active

042578558

ABSTRACT:
An electrolytic cell for the production of aluminum metal comprises a permanent hollow anode structure of substantially corrosion-resistant material, with numerous perforations in the base of said structure, a packed bed of consumable carbon pieces supported by said base within the hollow space of said structure, means for heating said base so as to form a molten cryolite bath upon cell start-up, means for controllably cooling the walls of said anode structure to form a protective layer of frozen cryolite over said walls at the air-cryolite interfaces, means for adding fresh pieces of said consumable carbon to replenish said packed bed when a substantial portion thereof has been consumed, and means for adjusting the depth of immersion of said packed bed within said molten cryolite bath so as to reduce voltage and energy requirements or increase the rate of aluminum production.

REFERENCES:
patent: 3278410 (1966-10-01), Nelson
patent: 4118292 (1978-10-01), Fray et al.

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