... of grains, we specially process the ingots, separate the magnetic material, and sieve the grains carefully to get a ... and abrasive area, such as making vitrified bonded grinding wheels, resin bonded tools, to process cast iron ... steel. As loose grains, it is widely used for polishing none-metal material like ceramic, glass, stone ... 1. Green Silicon Carbide / GC-GPA for vitrified bonded grinding wheel