Calcium fluoride is the main component of fluorite or fluorite. The natural calcium fluoride mineral is fluorite or fluorite. It can be used as the source of fluorine and the raw material for hydrofluoric acid and fluoride; It is also used in the manufacture of glass, enamel, glaze and so on. Fluorite is mainly used as a flux for smelting metals, and very pure fluorite is used to make special lenses. Content in drinking water (1 ~ 1.5) × 10-6 calcium fluoride can prevent and treat dental disease. In addition, it is also used in steel smelting, chemical industry, glass and ceramic manufacturing. The pure product can be used as a catalyst for dehydration and dehydrogenation.