Process for the production of grained abrasives from melted or sintered, highly refractory inorganic hard materials with high grain toughness

Abstract From the Canadian patent

The present invention relates to a process for the production of grained abrasives from highly refractory inorganic hard materials with improved grain toughness which is distinguished, by the fact that a material in lump or block form obtained by, known processes for producing a finely cristalline internal structure, is size-reduced and the grains subjected to grading by grinding in a ball mill or tube mill in such a way that essentially only the porous, faulty or coarsely crystalline grains are sizereduced and separated off from the rest of the material. The process according to the invention is particularly suitable for improving the grain toughness of grained finely crystalline abrasives …