1. Spherical grain, low thermal expansion 2. Good anti-breakness, well refractory 3. Low density, neutral materials For supporting foundry and casting industry, we supply Ceramsite Foundry Sand (also called ceramic foundry sand) in large quantity. Regarding to this product, please find details as below, DescriptionCeramic Foundry sand is made from fine bauxite, by re-fused and blown to ball type. With advantage of fine surface smooth finish and air permeability, it is a new type casting material for precision casting, coated sand and self hardening sand etc. Using: Manufacture high-quality risers of iron and steel foundries, Lost-foam, Precoated sand;, Sodium silicon sand , Resin sand, Precision casting etc. Advantages:Spherical grain, low thermal expansion, good anti-breakness, well refractory, low density, neutral materials Application:Waterglass bonded sand, resin bonded sand, precision casting, Expendable Pattern Casting (EPC), Copper and Aluminium articles polishingChemical: Al2O3: 70% min ; Fe2O3: 3% maxGrain type: ball, sphericalAngularity: 1.1 max, similar to ballPacking density: 1.95-2.05 g/cm3Refractoriness: 1790 C minThermal expansion: 0.13% (10 min at 1000 C )Size: 10-14 mesh; 20-30 mesh; 30 mesh; 40-70 mesh; 100-140 mesh; 170 meshPacking: 25kg/bag or others 

AFS:20-150 Ceramic Foundry Sand For Casting