Process for continuous graphitization

Details Process for continuous graphitization Process for continuous graphitization

C - Chemistry, Metallurgy

04

B

C04B 35/52 (2006.01) C01B 31/04 (2006.01) F27B 9/06 (2006.01) F27B 14/06 (2006.01)

Patent

CA 2470686

Process for continuous graphitization, carried out in a tunnel furnace having a transport device, heat locks at the inlet and outlet of the furnace and in the interior of the furnace at least one heating section whose length is less than the length of the bodies to-be graphitized and whose heating power is altered according to the movement of the bodies, in particular for cathode blocks which are used in the electrolytic reduction of aluminum oxide.

L'invention concerne un procédé de graphitisation en continu, faisant appel à un four de type tunnel comprenant un dispositif d'acheminement, des sas thermiques à l'entrée et à la sortie du four, ainsi qu'au moins une section de chauffage située à l'intérieur du four, la longueur de cette section étant inférieure à la longueur du corps devant subir le traitement de graphitisation et sa puissance de chauffage étant modifiée à la suite du déplacement du corps. Ce procédé est destiné en particulier à des blocs cathodiques utilisés pour la réduction électrolytique d'oxyde d'aluminium.

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