SURFACE-PROFILED CATHODE BLOCK CONTAINING HARD MATERIAL

摘要

The invention relates to a cathode block for an aluminum electrolytic cell, comprising a base layer and a cover layer arranged thereon, the base layer containing graphite and the cover layer comprising at least in some sections a profiled surface, characterized in that the cover layer is composed of a carbon composite material that comprises 15 to less than 50% by weight of a hard material having a melting point of at least 1000 °C.