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How to distinguish magnesia bricks

Date:2019-11-13 Author: Click:

Magnesite brick (magnesite brick) magnesium oxide content of more than 90%, basic refractory with periclase as the main crystal phase magnesite brick listed company


Generally, it can be divided into two categories: sintered magnesia bricks (also known as fired magnesia bricks) and chemically bonded magnesia bricks (also known as unfired magnesia bricks). Magnesia bricks with high purity and high firing temperature are called direct bonded magnesia bricks due to the direct contact of periclase crystal grains; bricks made of fused magnesia as raw materials are called fused combined magnesia bricks.


Magnesia bricks have high refractoriness, good resistance to alkaline slag, high starting temperature for softening under load, but poor thermal shock resistance. Sintered magnesia brick is made of brick magnesia brick as raw material. After being crushed, batched, kneaded and shaped, it is fired at a high temperature of 1550 to 1600°C. The firing temperature of high-purity products is above 1750°C. Non-cast magnesia bricks are made by adding appropriate chemical binders to magnesia, then mixing, molding, and drying.

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The fired magnesia brick uses high-quality sintered magnesia as the main raw material, and paper pulp as the binder. After mixing and high-pressure forming, it is fired in a high temperature tunnel kiln above 1550℃. Has good thermal stability, corrosion resistance and peeling resistance. It is widely used in industrial furnaces such as converters and electric arc furnaces as refractory linings.


Fused magnesia brick has the advantages of compact brick structure, high mechanical strength and low impurity content. It is mainly used for heat storage in large glass kilns.


The high temperature area of the room. Fused magnesite is made by melting high-quality magnesite as raw material, and its English name is fused magnesite. It is calcined at high temperature from magnesite, brucite or magnesium hydroxide extracted from seawater. Strong resistance to hydration.


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