PROCEDIMIENTO DE FABRICACION DE ANODOS DE CARBON EN ESPECIAL PARA LA PRODUCCION DE ALUMINIO POR ELECTROLISIS.

摘要

A collar for protecting the iron spade of an anode rod for a carbon block that serves as an anode in the electrolytic production of aluminum comprises a plurality of shaped carbon blocks each with two close-fitting, abutting end faces and recesses which jointly correspond in cross-section to that of the anode spade or pin and surround the anode spade or pin projecting out of the anode block; the base areas of the said carbon collar blocks form a plane which is in contact with the carbon anode. The shaped carbon blocks are manufactured out of 60-90 wt % carbonaceous solids and 10-40 wt % bitumen binder. Because of their low pore volume the protective collars exhibit a low absorption capacity for sodium and a favorable combustion behavior during the electrolytic process.