Chemistry: electrical and wave energy – Processes and products
Patent
1988-08-31
1989-09-12
Valentine, Donald R.
Chemistry: electrical and wave energy
Processes and products
204241, 204244, 204245, 204247, C25C 306, C25C 308, C25C 312
Patent
active
048657018
ABSTRACT:
Alumina is reduced to molten aluminum in an electrolytic cell containing a molten electrolyte bath composed of halide salts and having a density less than alumina and aluminum and a melting point less than aluminum. The cell comprises a plurality of vertically disposed, spaced-apart, non-consumable, dimensionally stable anodes and cathodes. Alumina particles are dispersed in the bath to form a slurry. Current is passed between the electrodes, and oxygen bubbles form at the anodes, and molten aluminum droplets form at the cathodes. The oxygen bubbles agitate the bath and enhance dissolution of the alumina adjacent the anodes and inhibit the alumina particles from settling at the bottom of the bath. The molten aluminum droplets flow downwardly along the cathodes and accumulate at the bottom of the bath.
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Beck Theodore R.
Brooks Richard J.
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