Light burned magnesia powder is produced by calcining magnesite at a temperature below 1000 ℃. It plays an important 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. Light burned magnesia powder is the active magnesia produced by calcining magnesite. The ability of physical adsorption and chemical reaction of magnesium oxide is called the activity of magnesium oxide, which has a great influence on the production process and quality of products. Light burned magnesia was calcined by two-step calcination method to obtain sintered magnesia.
Light burned magnesia is commonly known as light burned powder, light burned magnesia, also known as caustic magnesia, often in white, light yellow shape. The melting point and boiling point are 2852 ℃ and 3600 ℃ respectively. It is easily soluble in acid and ammonium salt, but not in organic solvents such as ethanol. It is a hard cementing material that is easy to be deliquescent 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 and other fields because of its excellent alkali resistance, insulation resistance, light transmittance, large coefficient of thermal expansion and excellent thermal conductivity in high temperature environment.
Light burned magnesium powder
At present, the production of light burned magnesia is mostly made by calcining 20-100 mm magnesite at 700-1200 ℃. Because the decomposition rate of MgCO3 and the state of MgO development are different, the activity of MgCO3 is also different. Its activity lies in the content of active magnesia in light burned magnesia, and its physical adsorption and chemical reactivity depend on it. For this reason, whether the activity of MgO can be accurately measured directly affects the production and application of light burned MgO in practice.