High purity magnesium oxide generally refers to magnesium oxide products with purity greater than 99%. Since high-purity magnesium oxide has excellent physical properties such as ultra-high melting point, good magnetic conductivity and excellent insulating properties, and specific chemical properties, it is widely used in many fields such as ceramics, metallurgy, medicine, electronics and national defense.
The development and industrialization of high purity magnesium oxide will greatly promote the development of electronics, national defense, aerospace and advanced ceramics industries[. The production of common grade magnesium oxide products in China is large, a large number of exports, the market is weak; and some fine magnesium oxide such as high purity magnesium oxide, active magnesium oxide, silicon steel magnesium oxide and other fine magnesium oxide market demand is large, the products are imported in large quantities.
1 common magnesium oxide preparation method
The production of magnesium oxide raw material sources are mainly liquid ore and solid ore. The former is mainly seawater, underground brine, salt lake brine; solid ore is mainly magnesite, hydromagnesite, dolomite, serpentine and asbestos tailings, etc. By the brine or water chloromagnesite preparation of magnesium oxide method mainly has lime milk method, ammonium carbon method, ammonia method, soda ash method, water chloromagnesite direct pyrolysis method; by solid ore preparation of magnesium oxide method mainly has calcined magnesite method, carbonization method, acid solution method, ammonium sulfate method and ammonium sulfate compound salt method, etc.
2 high purity magnesium oxide preparation method
The production of high-purity magnesium oxide is generally used in…
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