Aluminium smelting cells

C - Chemistry – Metallurgy – 25 – C

Patent

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204/142

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

Patent

CA 2010324

An aluminium smelting cell comprising a cathode having an active upper surface, a plurality of anodes each having a lower surface spaced from the upper surface of the cathode, said cathode upper surface being sloped at an acute angle in a primary or longitudinal direction of each anode, and being formed with pairs of oppositely sloped surfaces extending in a transverse or secondary direction under each anode to cause complementary shaping of the lower anode surfaces to reduce the migration of bubbles between the anode and cathode along the anode surfaces in said primary or longitudinal direction to thereby reduce the path length of said bubbles whereby the turbulence caused by coalesced bubble disengagement from the bath electrolyte is significantly reduced while maintaining adequate bath circulation between the anode and cathode.

Cellule de fusion de l'aluminium comprenant une cathode qui a une surface supérieure active, une pluralité d'anodes qui ont chacune une surface inférieure espacée de la surface supérieure de la cathode, ladite surface supérieure de la cathode étant inclinée à un angle aigu dans un sens primaire ou longitudinal de chaque anode, et étant formée avec des paires de surfaces inclinées de façon opposée s'étendant dans un sens transversal ou secondaire sous chaque anode pour causer un façonnage complémentaire de la surface inférieure des anodes de manière à réduire la migration des bulles entre l'anode et la cathode le long des surfaces d'anode dans ledit sens primaire ou longitudinal et ainsi réduire la longueur de parcours desdites bulles, ce qui fait que la turbulence causée par le dégagement des bulles coalescées de l'électrolyte du bain est réduite de façon importante alors qu'est maintenue dans le bain une circulation adéquate entre l'anode et la cathode.

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