Cryolite is a crystalline white powder. Slightly soluble in water, with a density of 2.95-3.0 and a melting point of about 1000 ¡æ. It is prone to water absorption and moisture, and can be decomposed by strong acids such as sulfuric acid and hydrochloric acid to generate hydrofluoric acid and corresponding aluminum and sodium salts. Mainly used as a co solvent for aluminum electrolysis and as a wear-resistant additive for grinding products, it can effectively improve the wear resistance and cutting force of grinding wheels, extend their service life and storage time; Fluxes for ferroalloys and boiling steel, fluxes for non-ferrous metals, deoxidizers for casting, catalysts for olefin polymerization; And it is used for anti reflective coatings on glass, opacifying agents for enamel, floating agents for glass, cosolvents for welding materials, fillers in the ceramic industry, resins, wear-resistant fillers in the rubber industry, insecticides for pesticides, etc.