The details of magnesia carbon brick

Magnesia carbon brick is a refractory consisting of MgO at 80-85% or more, with magnesite as the main mineral. The raw material of Magnesia carbon brick is mainly magnesite, the basic component is MgC03, after high temperature calcination into sintered magnesite, and then broken into a certain size after sintering magnesia (also known as metallurgical magnesia). Magnesia is widely used as a furnace material, refractory ramming material, containing less magnesium magnesia, as the manufacture of refractory raw materials of magnesia fire brick. Natural magnesite resources are few, China's reserves and production rank the forefront of the world. Many countries that lack magnesite rely on magnesia made from seawater, and the cost is high.

Magnesia carbon bricks according to their different production processes, divided into two kinds of sintered magnesia and chemical combination of magnesia brick. Sintered magnesia is used to burn, the size of particles with the appropriate proportion of magnesia, adding brine (MgCl2 aqueous solution) and sulfite pulp waste as a binder, press molding, in the 1550-1650 ℃ high temperature firing. In the firing process, the impurities in the magnesite and the addition of liquid phase, the magnesia carbon brick bonded together. And the chemical combination of magnesia carbon brick is not through the firing process, the sintered magnesite according to the proportion of grain with a good amount, adding the right amount of mineralizer and binder, press molding, after drying is finished. Chemical combination of magnesia carbon brick strength is low, the performance is not as good as sintered magnesia, but the price is cheap, less than half the price of sintered magnesia. It is used in the performance requirements are not too high parts, such as heating furnace and soaking furnace bottom.

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Article Source:Magnesia Carbon Brick
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