Mainly used as intermediate substance of pharmaceutical products, decomposer of acid liquor, desiccant, color protection liquor, carrier, anti-agglomeration liquor. It also used as additive for food, supplement of magnesium element. For rubber industry, it is used as ancillary substance and filler; It can be used as adiabatic, heatproof, fire proof and heat preservation material. For high-level glass product, ceramics, chinaware, it can increase their brightness of the surface. It can be used for magnesium salt pigment, paint, cosmetic, ship manufacture, boiler and so on.