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Lightly burnt magnesia

2020-08-27 13:40:47
Lightly burnt magnesia
Detailed introduction:

Classification of magnesium oxide: light magnesium oxide and heavy magnesium oxide. Light weight loose volume, white amorphous powder. Odorless, tasteless and non-toxic. Density of 3.58 g/cm after. Insoluble in pure water and organic solvents, solubility in water increases due to the presence of carbon dioxide. Soluble in acid and ammonium salts solution. To be transformed into crystals by burning at high temperatures. Meet the carbon dioxide in the air to form magnesium carbonate double salt. Dense weight, white or beige powder. Easy to combine with water, dew air easy to absorb water and carbon dioxide. Mixed with magnesium chloride solution easy to gelatinize hardening.

With the industrial upgrading and the demand and development of high-tech functional materials market, the company has developed and produced a series of high-tech fine magnesium oxide products, which are mainly used for nearly ten varieties, such as high lubricating oil, high tanning leather extraction alkali grade, food grade, medicine grade, silicon steel grade, high electromagnetic grade and high purity magnesium oxide.

Industrial grade light burning

Application: Mainly used in the production of magnesite products. Light burned magnesium oxide and magnesium chloride aqueous solution in a certain proportion can be gelled and hardened into a certain physical and mechanical properties of the hardened body, known as magnesite cement. Magnesite cement, as a new type of cement, has the advantages of light weight and high strength, fire prevention and heat insulation, energy conservation and environmental protection, and can be widely used in building materials, municipal, agriculture, machinery and other fields.

Magnesium oxide is commonly known as bitter soil, also known as magnesium oxygen, magnesium oxide is an alkaline oxide, has the common property of alkaline oxide, belongs to cementitious material. White powder (pale yellow for magnesium nitride), odorless, tasteless, non-toxic, is a typical alkaline earth metal oxide, chemical formula MgO. White powder, melting point 2852℃, boiling point 3600℃, relative density 3.58(25℃). Soluble in acids and ammonium salts, insoluble in alcohol. The solubility in water was 0.00062g/100mL(0℃) and 0.0086g/100mL(30℃). When exposed to air, it is easy to absorb water and carbon dioxide, and gradually becomes basic magnesium carbonate. Light products are faster than heavy ones, and combine with water to produce magnesium hydroxide under certain conditions, showing a slightly alkaline reaction. The pH of saturated aqueous solution is 10.3. Soluble in acids and ammonium salts are insoluble in water, and the solution is alkaline. Insoluble in ethanol. Strong refraction in both visible and near-ULTRAVIOLET light. Magnesite (MgCO3), dolomite (MgCO3·CaCO3) and sea water are the main raw materials for producing magnesium oxide. To obtain magnesium oxide by thermal decomposition of magnesite or dolomite. The precipitation of magnesium hydroxide was obtained by treating seawater with calcined lime, and then magnesium hydroxide was obtained by burning magnesium hydroxide. It is also possible to use the magnesium chloride halogen block obtained in the comprehensive utilization of seawater or the brine after bromine extraction as raw materials, add sodium hydroxide or sodium carbonate to produce magnesium hydroxide or basic magnesium carbonate precipitation, and then burn to obtain magnesium oxide. China mainly USES magnesite, dolomite, brine or brine as raw materials

Magnesium oxide has high fire-resistant insulation properties. It can be transformed into crystal by high temperature burning above 1000℃, and then become dead burned magnesia (also known as magnesia) or sintered magnesia when rising to 1500-2000 ℃.


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