Magnesium oxide (chemical formula: MgO) 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 has a high degree of refractory insulation properties. It can be converted into crystal by burning at a temperature above 1000 °C, and it is raised to 1500 - 2000 °C [1] to form a burnt magnesia (also known as magnesia) or sintered magnesia.
Magnesium oxide is commonly known as bitter soil, also known as magnesium oxide. Magnesium oxide is an alkaline oxide and has the property of a basic oxide. It is a gelling material. White powder (light yellow is magnesium nitride), odorless, odorless, non-toxic, is a typical alkaline earth metal oxide, chemical formula MgO. A white powder having a melting point of 2852 ° C, a boiling point of 3600 ° C and a relative density of 3.58 (25 ° C). Soluble in acid and ammonium salt solution, insoluble in alcohol. The solubility in water is 0.00062 g/100 mL (0 °C)
0.0086 g/100 mL (30 °C). Exposure to air, easy to absorb water and carbon dioxide and gradually become basic magnesium carbonate, lighter products are faster than heavy products, combined with water to form magnesium hydroxide under certain conditions, slightly alkaline reaction, pH of saturated aqueous solution It is 10.3. Soluble in acid and ammonium salts are insoluble in water, and the solution is alkaline. Do not dissolve in ethanol. Strong refraction in the visible and near-ultraviolet range. Magnesite (MgCO3), dolomite (MgCO3·CaCO3) and seawater are the main raw materials for the production of magnesium oxide. Thermal decomposition of magnesite or dolomite gives magnesia. The seawater is treated with slaked lime to obtain magnesium hydroxide precipitate, and the magnesium hydroxide is burned to obtain magnesium oxide. The magnesium chloride halide block obtained by comprehensive utilization of seawater or the brine after bromine extraction may be used as a raw material, and sodium hydroxide or sodium carbonate may be added to form magnesium hydroxide or basic magnesium carbonate precipitate, and then calcined to obtain magnesium oxide. China mainly uses magnesite, dolomite, brine or halogen blocks as raw materials.
Application:
Chemical industry used as raw
material for producing magnesium sulfate, magnesium hydroxide, magnesium chloride, building materials industry, magnesium mobile house, magnesium fertilizer production raw material, waste acid water neutralizer, heavy metal ion adsorbent
industrial oxidase: also known as light Magnesium oxide. It plays an important role in many inorganic salt products.
It is mainly used in the production of enamel, ceramics, refractory materials, etc.
as a filler
in the manufacture of polishing agents, adhesives, and paints. It is used as a promoter and catalyst
in rayon, rubber (chloroprene rubber, fluororubber). Antacids and laxatives for the treatment of hyperacidity, stomach and duodenal ulcers are
used as decolorants in food processors for sugar refining. Ph adjusting agent of ice-cream
in the construction industry, can be produced magnesium hydroxide and special cement insulation board:
in agriculture as a fertilizer and the maximum use is livestock feed, animal and plant metabolism are the main elements, Used as a feed for dairy cows to prevent nervous system dysfunction caused by magnesium deficiency, the so-called pasture rickets;
in the chemical industry, the use of magnesium and magnesium chemicals such as magnesium sulfate, magnesium oxide and other industrial products;
In addition, it is also used in water treatment, flue gas washing and in the glass, dye, cable, silicon steel industry, uranium processing electronics industry, insulation materials industry, as well as in petroleum additives, casting, phenolic plastics and other industries.
