Cell for aluminium electrowinning

Details Cell for aluminium electrowinning Cell for aluminium electrowinning

1999-03-29

2000-07-25

Valentine, Donald R.

Electrolysis: processes, compositions used therein, and methods

Electrolytic synthesis

Utilizing fused bath

204245, 204294, C25C 308, C25C 300, C25B 1112

Patent

active

060933046

ABSTRACT:
An electrolytic cell for the electrowinning of aluminium from alumina dissolved in a halide-containing molten electrolyte, has a cathode cell bottom made of a series of carbon cathode blocks (10) connected side-by-side by glue or ramming paste, each one provided with steel or other conductive bars (11) for the delivery of current and a series of anodes (15) facing the cathode cell bottom. The tops of the carbon blocks (10) forming the cathode cell bottom are shaped in such a way as to provide in the cell bottom a series of parallel channels (25) or grooves preferably coated with an aluminium-wettable refractory coating (35) covered in use by a pool (40) of molten aluminium or a layer of molten aluminium forming a drained surface. Movement of the aluminium pool (40) is decreased, cell operation improved and cell life extended.

REFERENCES:
patent: 3729398 (1973-04-01), Schmidt-Hatting
patent: 4392925 (1983-07-01), Alder et al.
patent: 4462886 (1984-07-01), Kugler
patent: 4622111 (1986-11-01), Brown et al.
patent: 5362366 (1994-11-01), de Nora et al.
patent: 5472578 (1995-12-01), de Nora

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