Maintaining molten salt electrolyte concentration in...

Details Maintaining molten salt electrolyte concentration in... Maintaining molten salt electrolyte concentration in...

C - Chemistry, Metallurgy

25

C

C25C 3/06 (2006.01) C25C 3/08 (2006.01) C25C 3/22 (2006.01)

Patent

CA 2473579

A method of maintaining molten salt concentration in a low temperature electrolytic cell used for production of aluminium from alumina dissolved in a molten salt electrolyte contained in a cell free of frozen crust wherein volatile material is vented from the cell and contacted and captured on alumina being added to the cell. The captured volatile material is returned wiht alumina to cell to maintain the concentration of the molten salt.

La présente invention porte sur un procédé visant à maintenir la concentration de sel fondu dans une cellule d'électrolyse basse température utilisée pour produire de l'aluminium à partir d'alumine dissoute dans un électrolyte de sel fondu contenu dans une cellule dépourvue de croûte gelée. Selon ce procédé, un matériau volatile est évacué de la cellule, puis mis en contact et capturé sur l'alumine ajoutée dans la cellule. Le matériau volatile capturé est réintroduit avec l'alumine dans la cellule afin de maintenir la concentration de sel fondu.

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