Background of the preparation of Magnesium Fluoride MgF2 products
Colorless tetrahedral crystal or white powder, toxic. It is practically insoluble in water and ethanol, but easily soluble in nitric acid. Magnesium Fluoride MgF2 products are colorless tetragonal crystals or powders, soluble in nitric acid, slightly soluble in dilute acids, and practically insoluble in water and alcohol. It is mainly used as a flux in the manufacture of ceramics, glass and smelting magnesium and aluminum metals; coatings for lenses and filters in optical instruments; it can also be used as a fluorescent material for cathode ray screens, as a refractor and solder for optical lenses. The traditional production method of Magnesium Fluoride MgF2 products is to use different magnesium salts to react with hydrofluoric acid, mainly including magnesium carbonate method, magnesium oxide method and magnesium sulfate method.
The traditional method is to use hydrofluoric acid and magnesium salts for the reaction. Hydrofluoric acid is mainly produced by the reaction of fluorite with sulfuric acid. Traditional crafting requires consuming the valuable strategic resource of fluorite. Now the country has great control over fluorite, the higher the price of fluorite, the price of corresponding hydrofluoric acid will inevitably rise, thus affecting the cost of Magnesium Fluoride MgF2 products. Finding new sources of fluorine to replace hydrofluoric acid is an important way to reduce the cost and enhance the competitiveness of Magnesium Fluoride MgF2 products. In addition, the existing technology discharges a large amount of mother liquor in the production process, which has a serious impact on the surrounding environment.
The purity of Magnesium Fluoride MgF2 products is greatly affected by magnesium salts. The main content of Magnesium Fluoride MgF2 products produced using low-purity magnesium salts (magnesium carbonate, magnesium oxide) usually only reaches 75%, which can only meet the requirements of electrolytic aluminum and metal magnesium smelting additives. Flux requirements. To meet the requirements of optical lenses and fluorescent materials, high-purity magnesium salts must be used, and the two types of Magnesium Fluoride MgF2 products have very different specifications. At present, there is an urgent need to find a new magnesium salt to solve the problem of the high price of Magnesium Fluoride MgF2 products caused by the high price of high-purity magnesium salts.