Quartz sand is quartz particles formed by crushing and processing of quartz stone.Quartz stone is a non-metallic mineral, is a hard, wear-resistant, chemically stable silicate mineral, its main mineral composition is SiO2.The color of quartz sand is milky white, or colorless translucent, Mohs hardness 7.

Quartz sand is an important industrial mineral raw material, non-chemical dangerous goods, widely used in glass, casting, ceramics and fireproof materials, smelting ferrosilicon, metallurgical flux, metallurgy, construction, chemical industry, plastics, rubber, abrasives, filter media and other industries.

Quartz sand is a hard, wear-resistant, chemically stable silicate mineral, its main mineral composition is SiO2, quartz sand color is milky white, or colorless translucent, hardness 7, brittle no cleavage, shell fracture, grease luster, density of 2.65, bulk density (1-20 mesh is 1.6~1.8), 20-200 mesh is 1.5.Its chemical, thermal and mechanical properties have obvious anisotropy, insoluble in acid, slightly soluble in KOH solution, melting point 1750℃.

Common specifications of quartz sand are :0.5-1mm, 1-2mm, 2-4mm, 4-8mm, 8-16mm, 16-32mm, 10-20 mesh, 20-40 mesh, 40-80 mesh, 100-120 mesh.

Quartz sand is a variant of colorless, transparent quartz, which the Greeks called "Krystallos, "meaning" white ice, "and they were convinced that quartz was durable and strong ice.Ancient Chinese believed that cold crystals in the mouth could quench thirst.Quartz sandstone is a consolidated clastic rock, quartz debris content of more than 95%, from a variety of magmatic rocks, sedimentary rocks and metamorphic rocks, less heavy minerals, associated minerals for feldspar, mica and clay minerals.Quartzite can be divided into two types of sedimentary origin and metamorphic origin. The former refers to the quartzite ore with deep metamorphism and pure quality, and the boundary between clastic particles and cements is not obvious.Gangue is formed by hydrothermal process, almost all composed of quartz, dense block structure.

The mineral content of quartz sand varies greatly, mainly quartz, followed by feldspar, mica, cuttings, heavy minerals, clay minerals and so on.

Main classification

Quartz has a high fire resistance, the industrial quartz sand is often divided into: ordinary quartz sand, refined quartz sand, high purity quartz sand, molten quartz sand and silica powder.

Ordinary quartz sand

Ordinary quartz sand, that is, SiO2≥90-99%Fe2O3≤0.06-0.02%, refractoriness 1750℃, appearance: some large particles have yellow skin capsule on the surface.Ordinary quartz sand is generally a kind of water treatment filter material made of natural quartz ore by crushing, washing, drying and secondary screening;The filter material has the characteristics of: no impurities, no edges, high density, high mechanical strength, long service cycle of fouling capacity line, and is an ideal material for chemical water treatment.Grain size range 5-220 mesh, can be produced according to user requirements.Main applications: metallurgy, ink silicon carbide, glass and glass products, enamel, cast steel, water filtration, foam alkali, chemical industry, spray noise and other industries.

Refined quartz sand

Also known as pickling quartz sand, SiO2≥99-99.5%Fe2O3≤0.005%, the use of high-quality natural quartz sand, mortar.

High purity quartz sand

SiO2≥99.5-99.9%Fe2O3≤0.001%, the use of high-quality natural quartz stone, mortar.(mm is millimetres)

Molten quartz sand

Chemical composition :SiO299.9-99.95%Fe2O35PPM-25PPMmaxLi2O1-2PPMmaxAl2O320-30PPMmax

K2O20-25PPMmaxNa2O10-20PPMmax(PPM is one part per million)

Physical properties:

The appearance is colorless transparent block, granule or white powder.

Relative gravity :2.21;

Mohs hardness :7.0;

PH value :6.0.

Silica powder

Silicon powder: the appearance is gray or gray white powder, refractoriness >1600℃.Bulk weight :200~250 kg/m3.