Reduction pot

Details Reduction pot Reduction pot

1984-08-06

1985-10-22

Valentine, Donald R.

Chemistry: electrical and wave energy

Apparatus

Electrolytic

204294, C25C 308, C25B 1112

Patent

active

045486921

ABSTRACT:
A reduction pot for the fused salt electrolytic production of aluminum comprises an outer steel shell, a thermally insulating layer, and an inner lining made essentially of carbon with iron cathode bars embedded in it. At least the lower 75% of the floor insulation is a mechanically compacted layer of a granulate material essentially of particle size ranging up to 8 mm. This granulate contains the fully ground but otherwise untreated insulation layers, without carbon residues which are sorted out mechanically before grinding, from replaced electrolytic cells. The remaining 25% of the floor insulation is a layer of firebrick, ground firebrick and/or smelter alumina. The sidewalls of the steel shell are insulated solely by firebrick.

REFERENCES:
patent: 3457158 (1969-07-01), Bullough
patent: 3723286 (1973-03-01), Hunt et al.
patent: 4033836 (1977-07-01), Holmes
patent: 4175022 (1979-11-01), Vadla et al.
patent: 4411758 (1983-10-01), Hess et al.
patent: 4430187 (1984-02-01), Snaelund et al.

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