Process and gaseous effluent-collection device for changing spen

Electrolysis: processes – compositions used therein – and methods – Electrolytic synthesis – Utilizing fused bath

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Details

205392, 204245, 204247, 204279, 266157, 75 1027, C25C 322, C21B 722

Patent

active

059618124

ABSTRACT:
A process for changing spent anodes while recovering the majority of the gaseous compounds evolved by the spent anodes and by the bath crust removed from the electrolytic pots during the cooling phase uses an effluent-collection device for electrolytic pots. A device for collecting gaseous effluents from pots for the production of aluminum by igneous electrolysis allows the recovery of the gaseous compounds evolved by the spent anodes and by the crust which they contain during the replacement and cooling of these anodes and this crust. The device preferably includes a degassing and cooling container located at one of the ends of the hooding device of the pots. The container can be made to communicate with the suction produced by the gas collection device.

REFERENCES:
patent: 3664935 (1972-05-01), Johnson
patent: 4053384 (1977-10-01), Siegmund
patent: 4668352 (1987-05-01), Duprat et al.
patent: 4855031 (1989-08-01), Zannini
patent: 5435897 (1995-07-01), Zannini
patent: 5787108 (1998-07-01), Pavlicevic et al.

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