Quartz can be divided into ordinary quartz sand, refined quartz sand, high-purity quartz sand and fused silica sand according to its quality. 1, ordinary quartz sand: SiO2≥90~99%, FeO≤0.06~0.02%, refractoriness 1750~1800°C, large part of the appearance, yellow skin encapsulation on the surface. The particle size range is 5~220 mesh, which can be produced according to the user's requirements. Main uses: metallurgy, ink silicon carbide, glass and glass products, enamel, cast steel, water filtration, sodium silicate, chemical, sandblasting and other industries. 2, refined quartz sand: SiO2 ≥ 99 ~ 99.5%, Fe2O3 ≤ 0.02 ~ 0.015%, selected high-quality ore for complex processing. The particle size range is from 5 to 480 mesh, which can be produced according to user requirements, and the appearance is white or crystalline. Main uses: high-grade glass, glass products, refractory materials, smelting stones, precision casting, grinding wheel and other materials. 3, high purity quartz sand: SiO2 ≥ 99.5~99.9%, FeO ≤ 0.005%, is made of 1~3 grade natural crystal stone and high quality natural stone, carefully selected and finely processed. Particle size range 1~0.5mm, 0.5~0.1mm, 0.1~0.01mm, 0.01~0.005mm. 4, fused silica sand Chemical composition: SiO2: 99.9~99.99%; Fe2O3: 10PPM~25PPM; MaxLi2O content: 1~2PPM; MaxAl2O3 content: 20~30PPM; MaxK2O content: 20~25PPM; MaxNa2O content: 10~20PPM. Physical properties: Appearance is colorless and transparent, granular or white powder. True specific gravity: 2.21; Mohs hardness: 7.0; PH value: 6.0 5, silicon micropowder Silicon micropowder: Appearance is gray or off-white powder. Refractoriness > 1600 ° C. Bulk density: 200 ~ 250 kg / cubic meter. Velvet Fabric,Melange Velvet Fabric,Melange Elastane Velvet Fabric,Polyester Cotton Spandex Velvet Fabric SHAOXING LINGGE TEXTILE CO., LTD. , https://www.lingertex.com