High-strength alkali-resistant bricks
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Heavy refractory brick
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Details Introduction
Alkaline-resistant bricks are generally made from low-alumina clay bricks with an Al2O3 content of 25-30%, and are produced by adding silica, bauxite, and a suitable amount of additives to improve compressive strength. Alkaline-resistant bricks use silica, bauxite, and a suitable amount of additives to improve the microstructure of the products. During use, they react with alkaline oxides to form a high-viscosity glass phase that covers the surface of the bricks, blocking surface pores and preventing the infiltration of alkaline slag, thus achieving resistance to alkaline corrosion. The products have characteristics such as volume stability, erosion resistance, and impermeability. They are widely used in preheaters, decomposition furnaces, and tertiary air ducts of cement kilns.Physical and chemical indicators:ProjectUnitInsulation type alkaline-resistant brick
Al
| ≥ |
% |
30 |
| Load softening temperature ≥Physical and chemical indicators:ProjectUnit℃ |
1200 |
Volume density ≥ |
| ≤1.8 |
Normal temperature compressive strength ≥ |
Mpa |
| 20 |
g/cmUnit |
Note: The above physical and chemical indicators are conventional indicators and can be optimized according to the actual usage environment characteristics of the user's kiln. |
| 常温耐压强度 ≥ |
Mpa |
20 |
| 注：以上理化指标为常规指标，可根据用户的窑炉实际使用环境特点另行优化标准 |
||
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High-strength alkali-resistant bricks
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