Light burned magnesia powder is produced by roasting magnesite at a temperature below 1000 ℃, Light burned magnesium powder ， It plays a role in metallurgy, chemical industry, light industry, agriculture, mining, environmental protection and other industries. Light burned magnesia is an important part of raw materials for the production of magnesite products, that is, active magnesia produced by calcining magnesite. The ability of magnesium oxide to carry out physical adsorption and chemical reaction is called the activity of magnesium oxide, which has a significant impact on the production process and quality of products. The light burned magnesia is calcined into sintered magnesia by two-step calcination method.
Light burned magnesium oxide is commonly known as light burned powder, light burned magnesium oxide, and also called caustic magnesium oxide, which is often presented in white and light yellow shapes. Its melting point and boiling point are 2852 ℃ and 3600 ℃ respectively. It is very easy to dissolve in acid and ammonium salt, but not easy to dissolve in organic solvents such as ethanol. It is a hard cementing material that is easy to be deliquested in the air. The sample with a mass fraction of more than 98% is called high-purity magnesium oxide. It is widely used in electronics, ceramics, chemical industry, etc. because of its excellent alkali resistance, insulation resistance, light transmittance performance in high temperature environment, and its relatively large thermal expansion coefficient and excellent thermal conductivity.
At present, the production of light burned magnesia is mostly made by calcining magnesite of 20~100mm block size at 700~1200 ℃. Because the decomposition rate of MgCO3 and the state of MgO development are different, the activity will also be different. Its activity lies in the content of active magnesium oxide in light burned magnesium oxide, and its physical adsorption and chemical reactivity depend on this. Because of this, whether its activity can be accurately measured will directly affect the production and application of light burned magnesia in practice.
