Forming crust in electrolysis of salt charge of aluminium...

Details Forming crust in electrolysis of salt charge of aluminium... Forming crust in electrolysis of salt charge of aluminium...

C - Chemistry, Metallurgy

25

C

204/49

C25C 3/06 (2006.01) C25C 3/08 (2006.01)

Patent

CA 1080151

ABSTRACT OF THE DISCLOSURE A molten salt charge as used in the electrolysis of aluminium contains aluminium oxide in excess of that of eutectic composition and is cooled at a surface colder than the melt in such a way that the aluminium 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.

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