Process for brasquing fused electrolysis cells

Details Process for brasquing fused electrolysis cells Process for brasquing fused electrolysis cells

1977-01-11

1977-10-04

Kaplan, G. L.

Chemistry: electrical and wave energy

Apparatus

Electrolytic

204244, 204294, 264 30, C25C 308, C25B 1112, F27D 116

Patent

active

040522881

ABSTRACT:
A process for brasquing cells for the fused electrolysis of alumina from the recovery of used brasques by treating the ground carbon-containing and refractory products of the base and walls by a known method with filtration of the insoluble constituents, distinguished by the fact that the base and lateral walls are covered by a heat-insulating bed formed by a mixture of carbon, NaF, CaF.sub.2, Al.sub.2 O.sub.3, Na.sub.2 SO.sub.4 and CaSO.sub.4, and by the fact that the cathode resting on the heat-insulating bed and containing the electrically conductive elements is formed from a brasque paste consisting of carbon, NaF, CaF.sub.2, AlF.sub.3, Na.sub.2 O and Al.sub.2 O.sub.3 associated with a binder which may be pitch.
The qualities of the aluminum obtained from this cell are unchanged in relation to conventional processes.

REFERENCES:
patent: 3457158 (1969-07-01), Bullough
patent: 3471380 (1969-10-01), Bullough
patent: 3514520 (1970-05-01), Bacchiega et al.
patent: 3723286 (1973-03-01), Hunt et al.
patent: 3764509 (1973-10-01), Etzel et al.

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