As we know, magnesia brick is made by firing at high temperature and its main crystal phase is magnesite. Generally speaking, magnesia brick manufacturing has burnt magnesia brick and the division that does not burn magnesia brick. Fired magnesia brick is divided into silicate combined magnesia brick, directly combined magnesia brick and recombined magnesia brick. Magnesia brick is divided into chemical combination of magnesia brick, asphalt combination of magnesia brick.
Magnesia brick is the most important refractory product in the basic refractory material, with high fire resistance and good corrosion resistance to iron oxides, basic slag and high calcium solvent. It is widely used in metallurgical kilns.
The fire resistance of magnesia brick can reach above 2000℃, the beginning temperature of general magnesia brick softening under load is 1520~1600℃, and high purity magnesia brick can reach 1800 ℃. Moreover, magnesia as the main component and magnesite as the main crystalline phase of the refractories are collectively referred to as magnesia refractories. In the heating furnace and the soaking pit, the magnesia brick is mainly used for paving the surface layer of the furnace bottom and the lower part of the soaking pit wall.
Magnesia brick manufacturing, with high thermal conductivity, is second only to carbon brick and silicon carbide brick in refractory products. This series of refractory brick in the room temperature conductivity is very low, but at high temperature (such as 1500℃) can not be ignored, if used in the bottom of the furnace, should be noticed. Magnesia brick in storage and transport to pay attention to moisture, rain and snow, so as not to cause irreparable losses.
The magnesia brick manufacturing is to break magnesia raw materials into granule and powder, according to a certain ratio of ingredients, add binder mixing mud, and then by molding, drying, firing and other processes finally made into burnt magnesia brick.
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