... 3.For foundry,plastics,coating 4.Quartz powder SiO2 sand 1.Application of QK quartz sand Glassmaking; Refractory; Ferrosilicon Smelting; ... ,foundry,plastics ,coating and others).2.Other name:Quartz sand,Quanrtz powder,SiO2 Sand,SiO2 poweder .3.Size : 16- ... The company produces high-quality products using selected natural quartz stone, 5.The chemical composition formCommoditySiO2(%)Al2O3(%)Fe2O3(%) ...