... is a black, friable, medium bulk density silicon carbide abrasive grain. Description:The high density black silicon carbide fused by heating high purity silicon sand and ... bonded grinding wheels, resign bonded grinding wheels. As loose grains, it is widely used for pressure blasting, surface finish and other ... 240, 280, 320, 360, 400, 500, 600, 800, 1000, 1200. Black Silicon Carbide used for Ceramic