Cathode pot for an aluminum electrolytic cell and process...

Details Cathode pot for an aluminum electrolytic cell and process... Cathode pot for an aluminum electrolytic cell and process...

C - Chemistry, Metallurgy

25

C

204/209, 18/5

C25C 3/08 (2006.01)

Patent

CA 1239617

- 1 - ABSTRACT A cathode pot for the electrolytic production of aluminum has composite bodies which line the sidewalls of the steel shell (1a) and are bonded to the carbon floor elements (22) such that a seal is formed. The inner side (10) of the said composite is of carbonaceous material and the outer side (12) of a hard ceramic material. This conducts the electric current poorly but conducts heat well, is resistant to mol- ten aluminum and the prevailing atmosphere of the process, and has a coefficient of thermal expansion comparable to that of carbon. The intimate joining together of the two sides (10, 12) permits almost unhindered flow of heat from inside to out- side. The composite bodies are manufactured in layers, mechani- cally compacted and baked or graphitised in packing powder. (Figure 6)

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