Melt film is mainly used for casting, plaster filler V shape and vacuum suction casting method of modeling materials, and large, medium and small steel, copper pieces, the refractory lining, but also for the manufacture of glass, refractory products, concrete and so on. Widely used in machinery, aviation, weapons, metallurgy, oil, insulation, sintering, construction and other industries. 
 General requirements for precision casting process: 
 Surface layer of pulp, zirconium powder: 325 mesh + silica sand: 120 mesh zircon sand 
 Back layer pulp: 325 + silica + mullite powder 200 mesh sand: Mo to sand 30-60 mesh 
 Reinforcement layer: mullite powder 200 mesh + silica sand: Mo to sand 16-30 mesh 
 Sealing slurry: mullite powder 200 mesh + sol