A new solid cathode,TiB 2 composite coating based on graphite has been invented Preliminary study indicates that the glutinous property between coating and graphite is nice,and the mechanical intensity of the coating is high The new cathode is expected to be used for lowering the distance between the two electrodes of three-layer aluminium electrolytic refinement and for saving electricity largel

This article introduces, analyzes and compares systematically the process characteristics for the aluminum purifying methods (three-layer liquid electrolytic purifying method and segregation method) which are widely adopted in international industrialization nowadays, meanwhile it puts forward several suggestions about developing national refined aluminum industry.