Light burnt magnesium powder is light yellow and light brown powder with particle size below -100 mesh, small crystal size (<3μm), true specific gravity 3.07~3.22, accumulation density 0.8~1.2g/cm3, refractive index 1.68~1.70, large lattice constant (α=0.4212), many lattice defects, brittle texture, pore structure, etc. High reactivity, easy to carry out solid reaction or sintering, with water to produce Mg(OH)2 and hardening, have bonding ability. Light fired magnesia powder from magnesite calcination, volume shrinkage of about 5%; Usually 3% to 5% of CO2 remains due to incomplete decomposition.
Light burned magnesium is mainly used to make cementing materials, such as cement containing magnesium. Insulation and sound insulation building materials, can also be made of ceramic raw materials. After chemical treatment of lightly burned magnesium, a variety of magnesium salts can be made and used in medicine. Light - fired magnesium ball rubber. Artificial fiber. Papermaking and other raw materials. Refired magnesium. Refractory material used mostly in metallurgy, used in the manufacture of magnesia bricks. Chrome magnesia brick. Magnesia. Metallurgical powder. Electromolten magnesium oxide is mainly used for smelting special alloy steel. Medium and high frequency induction furnace linings for non-ferrous and precious metals. Magnesium crucible. It can also be used as high temperature electrical insulation material. The source of light burning powder is calcined magnesite.