Differences between heavy burned magnesia and light burned magnesia

Sintered magnesia is mainly made of magnesite, brucite or magnesium hydroxide extracted from seawater by calcination at high temperature. Strong hydration resistance. When magnesite is calcined at 700-950 ℃, CO2 escapes, and the magnesite obtained is a soft porous loose material, which cannot be used as refractory material; Electrical-grade magnesia and magnesite are calcined at 1550-1600 ℃, which is called burnt magnesia. The burnt magnesia produced with natural magnesite as raw material by one or two step calcination process using high-temperature equipment such as shaft kiln and rotary kiln is called sintered magnesia; The sintered magnesia is divided into 18 grades according to its physical and chemical indexes,

When magnesite is calcined at 1800 ℃, carbon dioxide completely escapes, magnesium oxide forms a dense block of periclase, and the calcined magnesite (also known as sintered magnesite) is weighed. This kind of calcined magnesite has high fire resistance. Its main component is magnesium oxide, which is made from natural super-grade magnesite ore through flotation purification, light burning, fine grinding, high pressure ball pressing and ultra-high temperature oil shaft kiln calcination.

Light burned magnesium powder is a kind of bending resistant, pressure resistant, high strength, gas hardening and cementing material, which is widely used in national defense, medicine, chemical industry, paper making, shipbuilding and other industries. In the building materials industry, it can be used to make tire boards, particleboards, thermal insulation columns, railings, artificial marble, asbestos tiles, ordinary tiles, wallboards, and flooring. With the progress of science and technology, the use of calcined magnesium powder is more extensive. It can be used as civil products, light and heavy machinery packaging boxes, packaging bottom beams, high-temperature refractory materials, and also can be used to make beautiful and bright furniture, and can be used as casting models in the machinery industry.