The difference and function of quartz stone, quartz sand, and silica powder

    The quartz ore extracted from the mine is processed and the product with a general particle size below 120 mesh sieve is called quartz sand. The product that passes through a 120 mesh sieve is called quartz powder. Quartz sand is a hard, wear-resistant, and chemically stable Silicate mineral. Its main mineral component is SiO2. Its color is milky white, or colorless and translucent. Its hardness is 7. It is brittle and has no cleavage. It has a shell shaped fracture. It has grease luster. Its density is 2.65. Its bulk density (1.6 for 1-20 meshes, 1.5 for 20-200 meshes). Its chemical, thermal, and mechanical properties have obvious anisotropy. It is insoluble in acid, slightly soluble in KOH solution, and its melting point is 1750 ℃. Quartz sand is mainly used as water purification materials, glass manufacturing raw materials, casting additives and fluxes, raw materials for ceramic embryos, glazes, and refractory materials, main raw materials for smelting ferrosilicon, metallurgical fluxes, casting molding sand, grinding materials (sandblasting, hard grinding paper, sandpaper, sandcloth, etc.), raw materials for metallurgy, building materials, silicon compounds, and water glass, amorphous silica powder, improving the wear resistance of plastics, rubber, abrasive, etc.