1.ISO 9001:2000 2. Patent No.:200510017799.6 3.New Invention:China Artifical Sand 4Can replace chromite sand in refractory Process of ceramic sand :Raw material of calcined bauxite--- remelt ---blown into solid ball . Ceramic foundry sand with reasonable price,take advantage of cost and performance than chromite sand and zircon sand,especially low expansion,unsintered,non pulverse,non craze,non ...