Treated carbon cathodes for aluminium production

Details Treated carbon cathodes for aluminium production Treated carbon cathodes for aluminium production

C - Chemistry, Metallurgy

25

C

C25C 3/08 (2006.01)

Patent

CA 2155204

To improve its resistance to penetration and degradation by sodium, a carbon cathode for use in aluminium production by the electrolysis of alumina dissolved in a cryolite-based molten electrolyte is pretreated with a solution, suspension or melt of a lithium compound. This pre-treatment takes place prior to, during or after forming the cathode but before use thereof. The entire carbon cathode, or only that part of the carbon which is nearest to the active cathode surface is treated, malcing it more resistant to penetration by components of the molten electrolyte of aluminium.

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