Electrolytic cell for the production of aluminium and a...

C - Chemistry – Metallurgy – 25 – C

Patent

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C25C 3/08 (2006.01)

Patent

CA 2411453

The present invention relates to an electrolytic cell for the production of aluminum comprising an anode and an electrolytic tank where the electrolytic tank comprises an outer shell made from steel and carbon blocks in the bottom of the tank forming the cathode of the electrolytic cells. At least a part of the sidewall of the electrolytic tank consists of one or more evaporation cooled panels, and wherein high temperature, heat resistant and heat insulating material is arranged between the evaporation cooled panels and the steel shell. The invention also includes a method for maintaining a crust on the sidewall of the tank and for recovering heat from the cooling medium inside the panel for transformation into electrical energy.

La présente invention concerne une cellule d'électrolyse pour la production d'aluminium. Cette cellule comprend une anode et une cuve électrolytique qui comporte une enveloppe extérieure en acier, et des blocs de carbone dans le fond de la cuve formant cathode. Au moins une partie de la paroi latérale de la cuve se compose d'un ou de plusieurs panneaux refroidis par évaporation. En outre, un matériau calorifuge, thermo-résistant et supportant des températures élevées est placé entre les panneaux refroidis par évaporation et l'enveloppe d'acier. L'invention traite également d'un procédé pour maintenir une croûte sur la paroi latérale de la cuve et pour récupérer la chaleur du fluide de refroidissement à l'intérieur du panneau en vue de sa transformation en énergie électrique.

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