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Where are light-burned magnesia refractories widely used?

2022-07-29 16:51:15
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Refractory is a kind of fibrous light refractory material, the main chemical component is aluminum silicate, and can be divided into two categories: castable fiber and polycrystalline fiber according to its mineral composition. Castable fiber is an amorphous solid fiber formed by the molten liquid state in cooling. Polycrystalline fiber is mostly formed by colloid injection method (or spinning method), and is formed by high temperature calcination.


Light-burned magnesia refractory is widely used in thermal insulation and high temperature resistant materials of various thermal kilns. Because its heat capacity is much lower than other refractory materials, the heat storage is very small and the heat insulation effect is obvious. As a furnace lining material, it can greatly reduce the heat The power loss of the industrial kiln has brought an innovation to the thermal kiln in terms of energy saving. On the other hand, its application technology and methods have brought a revolution to the masonry of thermal kilns.


The main types of refractory materials are: general aluminum silicate fiber, high alumina aluminum silicate fiber, aluminum silicate fiber (Cr2O3, ZrO2), polycrystalline alumina fiber and polycrystalline mullite fiber. In recent years, some new types of refractories have been successfully developed (or are being developed) abroad, such as forsterite fibers, refractories (SiO2-CaO-MgO series and Al2O3-CaO series) and so on. Refractory cotton, felt, blanket, module, paper, cloth, belt, rope, etc.


Refractory blanket (fiber module): self-melting, continuous melting and continuous throwing production process is mostly used to make filament long fibers, and the fibers are interlaced by double-sided needle punching. , heat preservation in one, in neutral, oxidizing and partial reducing gas for long-term use, can still maintain good strength and resistance. The fiber module made of this fiber blanket does not contain binder and has good thermal stability, and is widely used in petrochemical, metallurgy, electric power and other thermal insulation and heat resistance fields.



Activated magnesium oxide is an important raw material for the preparation of high-function precision inorganic materials, electronic components, inks, and harmful gas adsorbents. It is expected to be developed as a material under severe conditions such as high temperature and high corrosion. It can also be used as a filler for paint, paper and cosmetics, a filler and reinforcing agent for plastics and rubber, and an auxiliary material for various electronic materials.


Light-burned magnesia is a kind of light-burned magnesia obtained from natural magnesite ore, brucite and magnesium hydroxide Mg(OH)2 extracted from seawater or brine, and calcined at a temperature of 700~1000℃.


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