... for the powder eg: W40, that is 320# 3. Application 1) Abrasive: Produce ceramic gring wheel, resinoid gringding wheel, Grinding stone ... , Gringing block, sand paper, sand cloth, sand belt, polish wax, abrasive paste, coating etc.. 2) Refractory material: Mainly used for ... furnace etc.. 3) Sandblasting abrasive: Mainly used for various material workpieces to decontaminate, derusting, prevent ...