Titanium diboride granules as erosion protection for cathodes

摘要

The invention relates to titanium diboride granules comprising aggregates of titanium diboride primary particles, where the titanium diboride granules have a rounded shape and are fracture-resistant. The invention further relates to a process for producing such titanium-diboride granules, their use for covering graphite cathodes in electrolysis cells in Al melt flux electrolysis or for the repair of holes in the cathode bottom of electrolysis cells and likewise a process for the repair of holes in the cathode bottom of electrolysis cells.