electrolytic cells for aluminum cathode blocks with heterotypic carbon structure

摘要

An aluminum electrolytic cell with cathode blocks profiled carbon, comprising: a box for lacelda (1) a carbon anode, an internal carbon coating on the bottom, and refractory and aislantestérmicos materials (3) provided between the inner liner carbon in the background and the cell box, internal elrevestimiento carbon in the background consists of a plurality of cathode carbon blocks (4), wherein the longitudinal direction of the cathode carbon block is perpendicular to the longitudinal direction of HOPPER cell, each cathode carbon block comprises a connecting portion at the lower end of decarbono cathode block and the protruding portion at the upper end of the cathode carbon block, the connecting portion integrally estáformada with the protruding portion, the connecting portions carbonoadyacentes cathode blocks are connected by compacting carbon pastes, and forming grooves extending in longitudinal ladirección the carbon cathode block between adjacent protruding portions of the carbon bloquescatódicos, wherein each protruding portion of the cathode carbon block comprises 2-8 bulging portions which estáncolocadas at predetermined intervals in the longitudinal direction the cathode carbon block to form bulging portions betweenthe adjacent a slot extending in the longitudinal direction of the cell box, and the height of the molten aluminum in the electrolytic cell from the top surface of the protruding portions of 30-200mm esaproximadamente after the aluminum is generated.