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Quartz sand, also known as silica sand, can be made into high-purity quartz sand after beneficiation and purification, which is widely used in glass, ceramics, metallurgy, casting and refractory materials industries.
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To make high-purity and ultra-high-purity quartz raw materials, it is necessary to remove all impurities except silica. The harmful impurities are composed of minerals containing iron and aluminum. The purification of raw materials is mainly reflected in the effective removal of impurities containing iron and aluminum.
Silica sand
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Silica sand includes ordinary silica sand, refined silica sand and high-purity silica sand. The content of silica in ordinary silica sand is between 90% and 99%, and the content of iron oxide is less than 0.02%; the content of silica in refined silica sand is between 99% and 99.5%, and the content of iron oxide is less than 0.015%; high-purity quartz The content of silica in sand is between 99.5% and 99.9%, and the content of iron oxide is less than 0.001%.
Silica sand with higher purity is milky white. When there is a large amount of impurities, silica sand will appear brownish red, light brown and other colors. The melting point of silica sand is about , the particle size is between 0.02mm and 3.35mm, and it is insoluble in removing hydrogen and fluorine. Acids other than acids have good chemical stability, electrical insulation, and wear resistance.
The major glass-producing countries, such as the Soviet Union, the United States, Belgium and others, mostly use natural silica sand as raw materials for glass. The quality of natural silica sand in my country is relatively poor. Generally, silica sand crushed by quartz sandstone is used as the raw material for glass.
Quartz sand
Quartz sand is a quartz particle produced by crushing quartz stone. Quartz stone is a non-metallic, hard, wear-resistant, and chemically stable silicate mineral. The color of quartz sand is milky white, or colorless and translucent, with a Mohs hardness of 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 materials and other industries.
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