... with other foundry s Specifications1. Patent No.2005100177 2.Patent NO.200510017799.6 3.Replace zircon sand in casting industry 4 ... and steel foundries, Lost-foam, Precoated sand;, Sodium silicon sand , Resin sandCeramic Moulding sand for foundry Al2O3≥75%Fe2O3≤5% Tio2 :2 ... and steel foundries, Lost-foam, Precoated sand;, Sodium silicon sand , Resin sand, Precision casting etc Ceramsite Foundry Sand