Alumina reduction cell

Details Alumina reduction cell Alumina reduction cell

1981-05-21

1983-05-17

Valentine, Donald R.

Chemistry: electrical and wave energy

Apparatus

Electrolytic

204294, C25C 308, C25B 1112

Patent

active

043839100

ABSTRACT:
An improved alumina reduction cell is described in which the carbonaceous cathode includes refractory hard metal tiles projecting upwardly from the cell surface thereof, forming the true cathode surface, and a solid layer of alumina and cryolite beneath the molten aluminum produced within the cell and the alumina-cryolite bath from which the molten aluminum is obtained. This bottom alumina-cryolite layer protects the refractory hard metal-carbonaceous interface from attack by the molten aluminum, increasing the useful life of the cell.

REFERENCES:
patent: 4219391 (1980-08-01), Foster, Jr.
patent: 4224128 (1980-09-01), Walton
patent: 4231853 (1980-11-01), Rahn
patent: 4243502 (1981-01-01), Kugler
patent: 4308114 (1981-12-01), Das et al.
patent: 4308115 (1981-12-01), Foster, Jr. et al.

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