SiO2 Quartz powder,sand Has different meshes, from10 mesh to 600 mesh. Their ... : fusing agent of metal's smelting, making acidity fire brickFused quartz: pure Silicol Dioxide can be used to make fusedquartz and extract ... correctingGrind materials: making grindstone, oilstone, sandpaper, silicon carbonate white SiO2 Quartz powder