... by the high quality bauxite as raw materials, anthracite,scrap iron,in electricarc furnace (stationary,dump type) more than 2000 degrees ... two kinds,F sand can be used in making ceramics,resin abrasive consolidation;P sand is used in the manufacturing of the sand ... grinding,polishing,With tools such as attached,Can also be used in the surface piating,precision casting or make advanced refractory ...