Refractory article for electrolysis with a protective coating ma

Details Refractory article for electrolysis with a protective coating ma Refractory article for electrolysis with a protective coating ma

1977-07-22

1979-10-09

Williams, Howard S.

Chemistry: electrical and wave energy

Apparatus

Electrolytic

204297R, C25C 308, C25D 1702, C25C 310

Patent

active

041705335

ABSTRACT:
A molten salt charge as used in the electrolysis of aluminum contains aluminum oxide in excess of the eutectic composition and is cooled at a surface colder than the melt in such a way that the aluminum oxide precipitates onto this surface in the form of corundum crystals. Such a layer of crystals provides chemical and electrical insulation to the cooling surface under the corrosive conditions produced by the charge.

REFERENCES:
patent: 3829374 (1974-08-01), Kugler et al.
patent: 3859198 (1975-01-01), Emblem
patent: 4008144 (1977-02-01), Toubai et al.
patent: 4054500 (1977-10-01), Parent

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