Хороший керамический литейный песок

Using: Manufacture high-quality risers of iron and steel foundries, Lost-foam, Precoated sand;, Sodium silicon sand , Resin sand Ceramic Moulding sand for foundry Al2O3≥75% Fe2O3≤5% Tio2 :2.5%-3.5% SiO2 :8-12% Bulk density: 1.9-2.1g/cm3 Refractoriness: 1800 min oC Shape Ball Shape ,Sand Shape Angle Factor≤1.1 very close to ball or Sand Shape Thermal expansion0.13%10 minutes at 1000 Size:AFS 18-140 Using: Manufacture high-quality risers of iron and steel foundries, Lost-foam, Precoated sand;, Sodium silicon sand , Resin sand, Precision casting etc.