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Where Does Silica Sand Come From?

Posted: 2022-02-18

Quartz sand products come from naturally formed quartz sandstone mines, processed through complex physical processes, and the silica content is as high as 99%. Its ultra-high silicon content determines its hardness. Because of this characteristic, quartz sand is also used in the construction industry. In recent years, quartz sand has also been used in the advanced aviation industry, electronics industry, etc.

fluorite flotation process

Where does silica sand come from

1. Ordinary quartz sand

Ordinary quartz sand, that is, SiO2≥90-99% Fe2O3≤0.06-0.02%. Refractoriness 1750℃. The particle size range is 5-220 mesh, which can be produced according to user requirements. Some large particles have yellow skin cysts on the surface. Ordinary quartz sand is generally a water treatment filter material made of natural quartz ore, which is crushed, washed, dried, and screened twice. The filter material has the characteristics of no impurities, no edges and corners, high density, high mechanical strength, and long service life of the dirt-carrying capacity line. It is an ideal material for chemical water treatment. Mainly used in metallurgy, ink silicon carbide, glass and glass products, enamel, cast steel, water filtration, caustic soda, chemical, and other industries.

2. Refined quartz sand

Refined quartz sand is also called pickling quartz sand, SiO2≥99-99.5% Fe2O3≤0.005%. Selected high-quality natural quartz ore for complex processing. Appearance is white or crystalline. The particle size range is 5-480 mesh, which can be produced according to user requirements. The main uses are glass products, refractory materials, smelting stones, precision casting, grinding wheel abrasives, etc.

3.  High purity quartz sand

High-purity quartz sand, SiO2≥99.5-99.9% Fe2O3≤0.001%. High-purity quartz sand is made of 1-3 grade natural crystal stones and high-quality natural stones. The particle size range is 1-0.5mm, 0.5-0.1mm, 0.1-0.01mm, 0.01-0.05mm, and can be produced according to user requirements.

4. Fused silica sand

Appearance is the colorless and transparent block, granule, or white powder. Relative specific gravity: 2.21. Mohs hardness: 7.0. PH value: 6.0.

5. Microsilica

Appearance is a gray or off-white powder, refractoriness > 1600 ℃. Bulk density: 200~250 kg/m3.

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