Cathode systems for the electrolytic production of aluminum

C - Chemistry – Metallurgy – 25 – C

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C25C 3/16 (2006.01)

Patent

CA 2509839

The invention relates to cathode systems for electrolytically obtaining aluminium, said cathode systems being divided into at least two parts with different electrical resistances, in the direction of the longitudinal axes thereof on the side of the current supply from the cathode, in such a way that the electrical resistance from the ends of the collector (2) to the part of the edge region of the cathode which faces the collector is equal to at least 1.2 times the electrical resistance from the ends of the collector to the part of the centre of the cathode which faces the collector, either the contact material or the collector being divided into regions (13, 14) with different resistances. The invention also relates to methods for producing said cathode systems and to the use of the same for electrolytically obtaining aluminium.

Systèmes de cathode pour la production électrolytique d'aluminium, qui sont divisés en direction de leur axe longitudinal, du côté des sorties de courant de la cathode, en au moins deux parties à résistance électrique différente de manière telle que la résistance électrique des extrémités du collecteur (2) jusqu'à la partie de bordure de la cathode faisant face au collecteur est 1,2 fois plus élevée que la résistance électrique des extrémités du collecteur jusqu'à la partie du milieu de la cathode faisant face au collecteur, la matière de contact ou le collecteur étant divisé en zones (13, 14) de résistance différente. La présente invention concerne également des procédés de production desdits systèmes de cathode et leur utilisation dans la production électrolytique d'aluminium

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