Cryolite belongs to the white monoclinic system and is slightly soluble in water, and molten cryolite can dissolve alumina. Cryolite is often used as a flux in the electrolytic aluminum industry. With it, milky white glass can be produced, and it is also an opacifier for enamel.
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Cryolite uses：
Cryolite can be used as a co-solvent in aluminum electrolysis, and can be used as a wear-resistant additive in abrasive products. Abrasives with cryolite added have significantly improved grinding force and cutting force, as well as service life and storage time. be extended.Cryolite can be used as a solvent in ferrous alloys, boiling steel, non-ferrous metals, as a deoxidizer in casting, as a catalyst in the polymerization of alkenes, as an anti-reflection coating, in glass, as an emulsifier It is also used in enamel, and it is also an opalizing agent for glass, a flux for welding materials, a filler for ceramic industry, and so on.
The main purpose：
Cryolite produced in nature is very rare, and most of it is artificially used in industry. Cryolite is used as co-solvent, additive, deoxidizer, catalyst, emulsifier and filler in aluminum electrolysis, grinding products, ferroalloys, non-ferrous metals, enamel, glass, ceramics and other fields.
Industrial Quality Requirements:
The field with the largest amount of cryolite is the aluminum industry. As a flux for electrolytic aluminum smelting, there are strict requirements for the sodium-aluminum molecular ratio, impurity content, water content and other standards of cryolite.
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First of all, the higher the ratio of sodium to aluminum in cryolite, the higher the current efficiency of electrolytic aluminum smelting, which can reduce the loss of fluorine and cause less pollution to the environment. The cryolite with high polymer ratio is also suitable for the aluminum removal industry. used in other industries.
Secondly, the content of impurities such as silicon oxide, iron oxide, and phosphorus pentoxide in cryolite should be strictly controlled, because these impurities will affect the quality of aluminum ingots and the current efficiency of aluminum smelting.
Finally, control the water content of cryolite, the lower the water content, the better, because the presence of water will increase the consumption of cryolite.
