The role of magnesium oxide

The annual output of magnesia in China is about 12 million tons.


Sulfur and pyrite in coal and sulfur and arsenic in steel were determined. Used as a standard for white pigments. Light magnesium oxide is mainly used as raw material for preparing ceramics, enamel, refractory crucible and refractory brick. It is also used as polishing agent, adhesive, filler of paper, promoter and activator of chloroprene rubber and fluororubber. After mixing with magnesium chloride and other solutions, magnesium oxide water conditioner can be made. In medicine, it is used as antacid and laxative, for gastric ulcer and duodenal ulcer. In chemical industry, it is used as catalyst and raw material for making magnesium salt. It is also used in the manufacture of glass, dye meal and phenolic plastics. In the rice milling industry, heavy magnesium oxide is used for firing, grinding and semi roller. The construction industry is used to make artificial chemical floor, artificial marble heat proof board, sound insulation board, and the plastic industry is used as filler. It can also be used to produce other magnesium salts.


Used for dyestuff, paint, glass, ceramic, chemical reagent, medicine, food additive, etc


It is used in library to prevent books from being corroded by acid;


Insulation skin for conductor;


For the treatment of heartburn, gastric acid and acid dyspepsia;


It can be used as a short acting laxative;


It can be used as magnesium supplement;


Because of its refractory, it can be used as furnace lining;


Used as a white reference in colorimetry; (emissivity is about 0.9)


The pressed magnesium oxide can be used as optical coating. When the coating thickness is between 300 nm and 7 mm, the coating is transparent. The refractive index of 1 mm thick coating is 1.72.


It is used for climbing stone. It can absorb sweat from hands


Magnesium oxide smoke can cause metal smog


It is mainly used to prepare oral medicine to neutralize excessive gastric acid. The commonly used preparations are: magnesium milk emulsion; magnesium cover tablet containing 0.1g MgO per tablet; zhisuan powder powder mixed with magnesium oxide and sodium bicarbonate, etc.


The content of MgO is proportional to the activity in a certain range


And beyond that


It's inversely proportional!


Nowadays, magnesium oxide is misunderstood as light calcined powder by most people. In fact, this understanding is wrong. Light calcined powder can be said to be a kind of magnesium oxide. It is also called light calcined magnesium oxide, light calcined magnesium oxide, magnesia, Kutu powder (Japanese translation), magnesium calcium powder (because light calcined powder contains calcium oxide)


In the building materials industry, the lower the calcium oxide content, the better!


Properties: white powder, tasteless, exposed to air, easy to absorb water and carbon dioxide, soluble in acid and ammonium salt, insoluble in water and ethanol, melting point 2800, boiling point 3600, magnesia has high fire resistance and insulation performance, high melting point.






Magnesium oxide is one of the main uses of magnesium oxide as flame retardant. Traditional flame retardant materials widely use halogen-containing polymer or halogen-containing flame retardant mixture. However, in case of fire, due to thermal decomposition and combustion, a large number of smoke and toxic corrosive gases will be produced, which will hinder fire fighting and evacuation, and corrode instruments and equipment. In particular, it is found that more than 80% of the fatal accidents in fire are caused by the smoke and toxic gases produced by materials, so in addition to the flame retardant efficiency, low smoke and low toxicity is also an essential index of flame retardant. The development of China's flame retardant industry is extremely unbalanced. The proportion of chlorine based flame retardants is the largest among all flame retardants, and chlorinated paraffin is the monopoly. However, chlorine based flame retardants release toxic gases, which is far away from the non-toxic and high efficiency pursued by modern life. Therefore, in order to comply with the development trend of low smoke, low toxicity and pollution-free flame retardants in the world, the development, production and application of magnesium oxide flame retardants are imperative.


From the current situation, magnesium oxide as a flame retardant has a very broad development prospects, with the replacement of traditional flame retardant is more and more attention, the market prospect of magnesium oxide will be more bright.


Another use of magnesium oxide is to be used as neutralizing agent. Magnesium oxide is alkaline and has good adsorption performance. It can be used as neutralizing agent for acid containing waste gas, waste water treatment, waste water treatment containing heavy metals and organic matter. With the improvement of environmental protection requirements, domestic demand is growing rapidly.