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What is the use of mid-range magnesia?

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What is the use of mid-range magnesia?

2021-03-03 15:17:51
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The use of magnesia has attracted more and more attention with the development of the magnesia industry, and magnesia has become an important product in industrial production. Price of fused magnesia Understanding the use of magnesia is of great significance for the better development of the magnesia industry.


Magnesium is a general term for products produced by high-temperature treatment of magnesia raw materials such as magnesite to the extent of sintering. Using high-temperature equipment such as shaft kilns, rotary kilns and other high-temperature equipment for one-step calcination or two-step calcination process, magnesia fired with natural magnesite as raw material is called sintered magnesia; magnesite, etc. are used as raw materials to be melted and cooled by electric arc furnace smelting The latter is called fused magnesia; the one made by extracting magnesia from seawater is called seawater magnesia. Magnesia is one of the most important raw materials for refractory materials, and is used to manufacture various magnesia bricks, magnesia alumina bricks, ramming materials, and repairing materials. Containing more impurities, it is used to pave the bottom of steelmaking furnaces, etc.


Magnesia can be divided into fused magnesia, mid-range magnesia, high-purity magnesia and re-burned magnesia.


The burnt magnesia is made from natural magnesite ore and calcined in a high-temperature shaft kiln. The purpose of burnt magnesia: raw materials for making bricks and producing unshaped refractory materials, and the finished products are used for steelmaking, electric furnace bottom and ramming furnace lining.

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Fused magnesia is made by fusing selected special A-grade natural magnesite or high-purity light-burned magnesia particles in an electric arc furnace. The product has high purity, large crystal grains, compact structure, strong slag resistance, and good thermal shock stability. Therefore, the use of heavy fused magnesia is: it is an excellent high-temperature electrical insulation material, and it is also a high-grade manufacturing An important raw material for magnesia bricks, magnesia carbon bricks and unshaped refractories.


The mid-grade magnesia is produced from light-burned magnesia with 97% MgO content as raw material, and is produced by processes such as ball pressing and high temperature shaft kiln calcination. The product has good sintering degree and dense crystals. The purpose of mid-range magnesia is: it is a high-quality raw material for the production of mid-range magnesia refractory products.


High-purity magnesia is made by flotation and purification of natural super-grade magnesite ore, which is lightly burned, finely ground, pressed ball, and calcined in an ultra-high temperature oil shaft kiln. The purpose of high-purity magnesia is: it is a high-quality raw material for making bricks and indeterminate refractory materials.


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