Permeabilia-resistant high-alumina bricks
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Product Introduction
Permeabilia-resistant high-alumina brick is a special refractory material, which is mainly used in the aluminum industry for the lining of aluminum melting furnaces and holding furnaces. Here are some of the key properties and applications of permeability-resistant high-alumina bricks:
The impermeability-resistant high-alumina brick is made of high-alumina bauxite as the main raw material, by adding additives and firing treatment, which has the characteristics of anti-aluminium penetration. The surface microstructure of this type of brick is dense, which can effectively block the penetration of moisture and gases.
The impermeability high alumina bricks are divided into KST-85 and KST-70 according to the different aluminum oxide contents, of which 85 and 70 represent the mass percentage of aluminum oxide content. The shape and size of the bricks should meet the national standards, and they can also be produced according to the drawings provided by the buyer.
Permeabilia-resistant high-alumina bricks are mainly used in the lining of aluminum melting furnaces and holding furnaces in the aluminum industry, and have gradually become the preferred material in the industrial and construction fields because of their excellent permeability resistance and high temperature resistance.
Permeabilia-resistant high-alumina bricks are very important in high-temperature industrial applications due to their excellent properties, especially where direct contact with molten aluminum is required.
| Projects | Physical and chemical indicators | ||
| KST-85 | KST-70 | ||
| （Al2O3）/% | ≥ | 85 | 70 |
| （SiO2）/% | ≤ | 8 | 25 |
| （Fe2O3）/% | ≤ | 1.50 | 2.0 |
| Apparent porosity/% | ≤ | 15 | 18 |
| Bulk density (g/cm3) | ≥ | 2.90 | 2.60 |
| Compressive strength at room temperature /MPa | ≥ | 110 | 100 |
| △Si，△Fe(7075 aluminum alloy at 815°C×72h)/% | ≥ | Si≤0.50 Fe≤0.10 | Si≤0.80 Fe≤0.40 |
Key words:
Permeabilia-resistant high-alumina bricks
High-alumina bricks
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