Silica sand is Silica particles formed by crushing and processing of silica stone, a hard, wear-resistant, chemically stable silicate mineral, the main mineral composition is SiO2, is an important industrial mineral raw material.Silica sand color is milky white, or colorless translucent, hardness 7, brittle no cleavage, shell fracture, grease luster,density of 2.65, its chemical, thermal and mechanical properties have obvious anisotropy, insoluble in acid, slightly soluble in KOH solution, melting point 1750 degrees Celsius. Industrial silica sand is often divided into ordinary silica sand, refined silica sand, high purity silica sand, molten silica sand and silica powder, etc., widely used in glass, casting, ceramics and refractory materials, smelting iron silicon and other industries