Super Casting Sand CERAMIC BEADS **Be made of high alumina calcined bauxite,by fusing, spurtting and getting rid of impurity and sieving. **Be used to make molds for multiplicate castings in various sizes, shapes and materials. ** Be recycled for 3-4 times, no environment pollution problems. **Chemical composition(typical data) Chemical data AL2O3 SiO2 Fe2O3 CaO MgO K2O Na2O TiO2 % 77.61 13.07 2.43 0.28 0.37 tr 1.20 4.19 **Size:[...]