Electrolytic reduction cells

Details Electrolytic reduction cells Electrolytic reduction cells

C - Chemistry, Metallurgy

25

C

204/142

C25C 3/00 (2006.01) C25C 3/06 (2006.01) C25C 3/08 (2006.01)

Patent

CA 1175779

A B S T R A C T In an electrolytic reduction cell in which molten metal is produced by electrolysis of a molten electrolyte, less dense than the molten metal product, the molten product metal collects at the bottom of the cell. A filter is provided at this location and is constructed from a material which is resistant to attack by both the molten metal and molten electrolyte, and which is wetted by the molten metal, but not by the electrolyte. By correcting sizing of the passage or passages in the filter molten metal product can be drawn out of the cell without simultaneous withdrawal of molten electrolyte. In the case of a cell for the production of aluminium the filter is preferably constructed from titanium diboride.

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