Products List
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big fireclay bottom blocks
Description: Using big vibrating table and adopting special castables, the company produces furnace l...
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fire clay bricks
Description Fireclay bricks are the most widely used refractories made from clay minerals. It can be ...
Refractory Knowledge
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Refractory industry's sustainable development needs to ＂gre
At present, Europe, Japan, the United States and other countries and regions, because of the governme...
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Quality Management of Refractory Brick
The quality management of refractory brick problem description: 1. The quality problem in annular kil...
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Refractory Materials Used In the Alumina Circulation Boiling
The Alumina circulation boiling Baking Furnace is used to bake aluminum hydroxide. It is composed of ...
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6 major properties of refractory fiber
Refractory fiber is a fibrous light refractory material, which has the characteristics of light weigh...
News Center
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The advantages of diatomite insulation brick
Diatomite insulation brick is made of high-quality diatomite. It is made of high-quality diatomite, w...
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Application of Aluminosilicate Fiber Brick in Transformer
The traditional conversion furnace lining uses heavy refractory materials and the outer wall is insul...
What is Magnesia Brick?
According to different production process, magnesia brick is divided into sintered magnesia brick and chemical bonded magnesia brick. Sintered magnesia brick is used to burn, the size of particles ratio appropriate magnesia, adding brine (MgCl2 aqueous solution) and sulfite pulp waste liquid as a binder, press molding, firing under the high temperature of 1550-1650 ℃. And the chemical bonded magnesia brick is not through the firing process, after the sintered magnesia in proportion of granularity, adding the right amount of mineralizer and binder, press molding, through drying is finished product. The strength of the chemical bonded Magnesia brick is lower. The performance is not as good as sintered magnesia brick, but the price is cheap, less than half the price of sintered magnesia brick belongs to alkaline refractory material, has stronger resistance to the alkali slag, but can not resist the erosion of acidic slag, under the high temperature of 1600 ℃, can react when contacting with silica brick, fire clay brick or even high alumina brick. The refractoriness of magnesia brick is above 2000 ℃, but the load softening point is only 1550 ℃. And began to soften to 40%, the interval of deformation temperature is very small, only 30-50 ℃. The thermal stability of magnesia brick is also poorer, which is an important reason for the damage of magnesia brick.
In the heating furnace and the soaking furnace, magnesia brick is mainly used for surface layer of paving furnace bottom and the lower part of soaking furnace wall, which can resist the erosion of iron oxide skin.
In order to improve the thermal stability and high temperature strength of magnesia brick, adding industrial alumina powder into the ingredients, can be successfully used as high temperature furnace material, and also used for the parts of alkaline slag erosion.
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