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High alumina brick performance and fire resistance

2020-03-25

 High alumina brick performance and fire resistance

 

A neutral refractory with alumina content above 48%. It is made from bauxite or other raw materials with high alumina content through molding and calcination. High thermal stability, fire resistance above 1770 ° C. Good slag resistance. For the lining of masonry steelmaking electric furnace, glass melting furnace, cement rotary furnace, etc. High-load soft, low-creep high-alumina brick is a high-grade refractory made of super-alumina, fused alumina, and fused mullite. This product has low temperature creep and strong erosion resistance. Good thermal shock stability and other advantages, suitable for large and medium-sized hot blast stoves, it is high quality, high

The domestication of grade imported refractories has opened the next successful path and has been included in the national "Spark Program" project.

 

Refractory

The fire resistance of high alumina bricks is higher than that of clay bricks and semi-silica bricks, 1750 ~ 1790 ° C, which belongs to advanced refractory materials. There are many AI2O3 in high alumina bricks, which are close to neutral refractory materials, and can resist the erosion of acidic and alkaline slags. Because it contains SiO2, its ability to resist alkaline slags is weaker than that of acid slags.

 

The use of high alumina brick

Mainly used for masonry blast furnace, hot blast stove, electric furnace top, blast furnace, reverberatory furnace, rotary kiln lining. In addition, high-alumina bricks are also widely used as open-hearth regenerative lattice bricks, plugs for nozzle systems, and nozzle bricks. However, the price of high alumina bricks is higher than that of clay bricks, so it is not necessary to use high alumina bricks where clay bricks can meet the requirements.

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