According to the quality, quartz sand can be divided into ordinary quartz sand, refined quartz sand, high-purity quartz sand and fused quartz sand.
1. Ordinary quartz sand
SiO2≥90~99%, FeO ≤0.06~0.02%, refractoriness 1750~1800℃. Part of the appearance is large particles with yellow skin cysts on the surface. The particle size range is 5~220 mesh, and it can be produced according to user requirements.
Main application: metallurgy, ink silicon carbide, glass and glass products, enamel, cast steel, water filtration, sodium hydroxide, chemical industry, 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 ranges from 5 to 480 mesh, and can be produced according to user requirements. The appearance is white or crystalline.
Main applications: high-grade glass, glass products, refractory materials, smelting stones, precision casting, grinding wheels, etc.
3. High-purity quartz sand
SiO2≥99.5~99.9%, FeO≤0.005%. It is made of 1~3 grade natural crystal stones and high-quality natural stones, which are carefully selected and finely processed. The particle size range is 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. Max Li2O content: 1~2PPM. Max Al2O3 content: 20~30PPM. Max K2O content: 20~25PPM. Max Na2O content: 10~20PPM.
Physical properties: Appearance is colorless transparent block, granule or white powder.
True specific gravity: 2.21
Mohs hardness: 7.0
PH value: 6.0
5. Silica powder
Silica powder: Appearance is gray or off-white powder. Refractoriness>1600℃.
Bulk density: 200-250 kg/m3.