Electrolysis tank, for the production of aluminum, having a floa

Details Electrolysis tank, for the production of aluminum, having a floa Electrolysis tank, for the production of aluminum, having a floa

1983-06-30

1985-08-06

Valentine, Donald R.

Chemistry: electrical and wave energy

Apparatus

Electrolytic

204284, 204290R, 204291, C25C 308, C25B 1103, C25B 1104

Patent

active

045334528

ABSTRACT:
The invention relates to an electrolysis tank for production of aluminum by electrolysis of alumina dissolved in a molten cryolite bath, by the Hall-Heroult process, between at least a carbon anode and an aluminum sheet covering a carbon cathode substrate. At the interface of the aluminum sheet and molten cryolite bath it comprises a floating screen, which is conductive of electric current, not connected to the carbon cathode substrate and free to move at least in the vertical direction.
The floating conductive screen can extend over the entire interface or be limited to being perpendicular to each anode.
The distance between each anode and the floating conductive screen can be reduced to about 20 mm.

REFERENCES:
patent: 2407691 (1946-09-01), Suchy et al.
patent: 3554893 (1971-01-01), DeVarda
patent: 4177128 (1979-12-01), Rahn
patent: 4338177 (1982-07-01), Withers et al.
patent: 4436598 (1984-03-01), Tabereaux et al.
patent: 4443313 (1984-04-01), Gesing et al.
patent: 4462886 (1984-07-01), Kugler

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