Kupper Ceramsite Spherical Ceramic Foundry Sand

We are offering Size:200#-1500# AFS15-AFS170 Main Chemical Composition: Al2O3:70-85% SiO2:5%-20% Fe2O3:5%max TiO2 :5%max Physical Properties: Shape:ball, spherical Angularity: 1.1 max, similar to ball Bulk Density:1.95-2.05(gcm3) Refractoriness: 1790 C min Thermal expansion: 0.13% (10 min at 1000 C ) Application: Waterglass bonded sand, resin bonded sand, precision casting, Expendable Pattern Casting (EPC), Copper and Aluminium articles casting treatment. Advantages: 1,replacement of Quartz Sands and Silica Sands 2,Low thermal expansion rate 3,high refractoriness