Properties of MGO magnesium oxide
MGO magnesium oxide commonly known as bitter, also known as MGO magnesium oxide, MGO magnesium oxide is alkaline oxide, with alkaline oxide of the nature, are cementitious materials. White powder (light yellow for the magnesium nitride), odorless, tasteless, non-toxic, is a typical alkaline earth metal oxide, chemical formula MgO. White powder, melting point of 2852 ° C, the boiling point of 3600 ° C, the relative density of 3.58 (25 ° C). Soluble in acid and ammonium salt solution, insoluble in alcohol. Solubility in water is 0.00062 g / 100 mL (0 ° C)
0.0086 g / 100 mL (30 ° C). Exposed to the air, easy to absorb moisture and carbon dioxide and gradually become the basic magnesium carbonate, light goods heavier goods faster, combined with water under certain conditions to produce magnesium hydroxide, was slightly alkaline reaction, saturated aqueous solution pH Is 10.3. Soluble in acid and ammonium salts are insoluble in water, the solution is alkaline. Insoluble in ethanol. There is a strong refraction in the visible and near ultraviolet light range. Magnesite (MgCO3), dolomite (MgCO3 · CaCO3) and seawater are the main raw materials for the production of MGO magnesium oxide. Thermal decomposition of magnesite or dolomite in magnesia. With the use of lime to deal with seawater magnesium hydroxide precipitation, burning magnesium hydroxide was magnesium oxide. Can also be used in the comprehensive utilization of magnesium chloride brine or bromine brine as raw material, add sodium hydroxide or sodium carbonate to produce magnesium hydroxide or alkaline magnesium carbonate precipitation, and then burned MGO magnesium oxide. China mainly uses magnesite, dolomite, brine or halogen as raw material.