Manufacturer of magnesia information

Manufacturer of magnesia information

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; Magnesite calcined at 1550-1600 ℃ 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. See the national standard GB/T 2273-1998 for details. Magnesite and other raw materials are melted in the electric arc furnace to reach the melting state and cooled, which is called fused magnesite; The magnesia extracted from seawater is called seawater magnesia. High-purity magnesia is made from natural super-grade magnesite ore after flotation purification, light burning, fine grinding, ball pressing and ultra-high temperature oil shaft kiln calcination. It is a high-quality raw material for brick and refractory materials. The medium-grade magnesia is produced from light-burned magnesia with a MgO content of 97% by pressing ball and calcining in high temperature shaft kiln. The product has good sintering degree and dense crystal. It is a high-quality raw material for producing medium-grade magnesia refractory products. It can also be used to manufacture various magnesia bricks, magnesia-alumina bricks, ramming materials, furnace repair materials, etc. It contains many impurities and is used to pave the bottom of the steelmaking furnace. 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.