Magnesia is far the largest magnesium salt dosage, mainly used for refractory material and light color of plastic and rubber products filling agent and reinforcing agent, used in ceramic, enamel, firebrick, refractory crucible refractory manufacture, can also as a polishing agent, adhesives, paint and paper packing, synthetic fiber and neoprene and fluorine rubber accelerator and activator, mixes with magnesium chloride solution with chloride magnesium cement could be;
It is used as an antacid and laxative in medicine for the treatment of gastric acid overload, gastric and duodenal ulcer and other diseases;
It can also be used in glass, dyestuff, phenolic plastics, etc.
It is used in the chemical industry to make magnesium metal and magnesium sulfate, magnesium chloride and other chemicals, and also used in water treatment, flue gas washing, etc.
At present, the production of light magnesium oxide by the carbonization method of dolomite is all made by separating calcium and magnesium under atmospheric pressure and low temperature (≤ 25%) carbonization method, and then producing light magnesium oxide by calcination. The whole process is characterized by great temperature variation and high energy consumption.
The principle of producing light magnesium oxide (industrial magnesium oxide) by carbonization of dolomite is to calcine the dolomite to obtain light calcined dolomite, then digest the light calcined dolomite, send it to the carbonization tower after the slag is removed, and react with CO from the calcined kiln.
During carbonation, carbonates dissolved in aqueous solution are dissociated by secondary stage (i.e. HCO;
(1) The dissociation ratio determines the H concentration of carbonized liquid.
When pH is 12.4, it is CO.
One being accounts for 99.3%.
Due to the strong alkalinity and high activity of calcium hydroxide, it is easy to form calcium carbonate precipitation.
When almost all of the calcium hydroxide is converted into calcium carbonate, the pH value of the suspension suddenly drops to 8.5 -- 9, and is determined by the equilibrium of magnesium hydroxide solution.
When the pH value is 8.5 at 25℃, 97.5% of the carbonates are dissociated in the form of HCO. Magnesium hydroxide is continuously dissolved into the liquid phase to form magnesium bicarbonate. However, when the pH value of the solution is 7.5, carbonation should be stopped to prevent the dissolution of calcium carbonate.
After filtration, magnesium bicarbonate solution (commonly known as heavy magnesium water) is obtained. Finally, alkaline magnesium carbonate is obtained by pyrolysis of heavy magnesium water, which is filtered again and dried to obtain basic magnesium carbonate.
Magnesium oxide can be obtained by calcination of basic magnesium carbonate at 700℃ ~ 1000 ℃
Meishen is the world's leading producer of magnesium oxide, Magnesium oxide is an oxide of magnesium, an ionic compound. It is a white solid at room temperature. Magnesium oxide exists in the form of periclase in nature and is a raw material for magnesium smelting. Magnesium oxide is white or light yellow powder, odorless, tasteless, this product is insoluble in water and ethanol, melting point 2852 ° C, boiling point 3600 ° C, magnesium oxide has high refractory insulation properties. It can be converted into crystal by burning at a temperature above 1000 ° C. If it rises above 1500 ° C, it will form a burnt magnesia or sintered magnesia.
Magnesium oxide can be used in the manufacture of metallurgy, smelting, advanced magnesia bricks, refractory materials and moisturizing materials. It is also widely used in rubber, rubber sheet, rubber products, pharmaceutical industry, food industry, plastic sheet accelerator, glass fiber reinforced plastics and Surface coating of silicon steel sheet, paper production, steel ball polishing, leather treatment, insulation materials, grease, dyes, ceramics, desiccant, resin, flame retardant, etc.
Hebei Meishen Chemical Technology Group is the main magnesium oxide producer in the world. It is also the largest magnesium salt producer in China and has won the ISO9002 quality system certification. It also has GMP-Certification.
With rich experience in the research, development, production, management and operation of magnesium oxide products, Meishen Group has always attached great importance to the research and development of new products and strict requirements on product quality. Meishen has a high-level sales team. The business covers more than 20 countries and regions around the world. It is widely welcomed by new and old customers.
Meishen has a high-level sales team. The business covers more than 20 countries and regions around the world. It is widely welcomed by new and old customers.