Aluminium reduction cell

Details Aluminium reduction cell Aluminium reduction cell

1986-08-13

1988-04-12

Valentine, Donald R.

Chemistry: electrical and wave energy

Apparatus

Electrolytic

204288, 204290R, 204291, 204292, C25C 308, C25C 316

Patent

active

047372532

ABSTRACT:
In an aluminium reduction cell including a cell lining and embedded therein at least one cathode current collector including a high temperature section comprising an electrically conducting refractory material such as titanium diboride, generally in conjunction with molten aluminium metal, corrosion is a problem. The invention provides a substance to protect the collector section. The substance may be a liquid impermeable layer e.g. particulate material impregnated with a molten fluoride-or chloride-containing salt mixture; for a getter such as particulate aluminium to react chemically with gaseous corrosive species. Combinations of these substances may be used, optionally in conjunction with a solid layer such as an alumina or aluminium metal tube.

REFERENCES:
patent: 3156639 (1964-11-01), Kibby
patent: 3274093 (1966-09-01), McMinn
patent: 3287247 (1966-11-01), Dewey
patent: 3321392 (1967-05-01), McMinn et al.
patent: 3607685 (1971-09-01), Johnson
patent: 4308115 (1981-12-01), Foster, Jr. et al.
patent: 4396481 (1983-08-01), Pawlek et al.

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