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The difference between high alumina brick and anti-spalling high-alumina brick

Oct 27, 2023

Compared with high-alumina brick and anti-spalling high-alumina brick, its process ratio and raw materials are used, and bauxite with high aluminum content is the main raw material, but anti-spalling brick is used with high bauxite to add zirconite, so that the product strength is higher, chemical corrosion resistance, thermal expansion coefficient, low thermal conductivity. The high aluminum brick is only high bauxite as raw material, the chemical corrosion resistance is not as good as the anti-stripping brick, mainly the anti-stripping brick than the high aluminum brick thermal shock stability is better.

 

Anti-peeling brick has strong anti-peeling ability, but also has anti-potassium, sodium, sulfur, chlorine and alkaline salt erosion, low thermal conductivity and other properties, is the cement kiln transition zone and decomposition zone of choice products, the biggest feature is good heat resistance and shock resistance, adapt to a variety of atmosphere environment ability. It is used in the pre-heat zone of rotary kiln or in the decomposition furnace and the grate cooler.

High aluminum brick and anti-peeling brick in the firing temperature is also different, anti-peeling brick than high aluminum brick high temperature firing temperature 30℃ higher, anti-peeling brick than high aluminum brick thermal conductivity is low, load softening temperature is high. The reason why high aluminum bricks can not enter the large cement rotary dry kiln is that the service life is low, and the repair and stop of the kiln frequently form a large amount of energy loss and economic loss. More importantly, it can not resist the inherent shortcomings of use in harsh parts.

 

The refractoriness of high alumina brick is mainly affected by the content of aluminum, and the refractoriness increases with the increase of the content of aluminum. High aluminum brick is a neutral material, the ability to resist alkaline slag is much weaker than the anti-spalling brick. High aluminum brick is mainly used in blast furnace, hot blast furnace, electric furnace top, blast furnace, reverberation furnace, calcium carbide furnace lining. In addition, high aluminum bricks can also be used in the production of lattice bricks, can also be made into plug head, water brick and so on.

 

The use of high-aluminum bricks is relatively more than the use of anti-spalling bricks, the amount is large, and there are many differences in price. In fact, the selection of these two kinds of bricks is based on the erosion of the lining and the temperature, and each has its own performance and use effect.

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