Product Description of Wear-Resistant High Alumina Bricks For Extreme Industrial Applications
High alumina wear-resistant bricks refer to aluminosilicate refractory materials with an Al₂O₃ content of more than 48%. They are typically categorized into three grades:
- Grade I: Al₂O₃ content ≥75%
- Grade II: Al₂O₃ content 60%–75%
- Grade III: Al₂O₃ content 48%–60%
They can also be classified based on their mineral composition into five types: low-mullite, mullite, mullite-corundum, corundum-mullite, and corundum. The main mineral components are corundum, mullite, and a glassy phase. The softening temperature under load for high alumina refractory bricks increases with the Al₂O₃ content.
High alumina wear-resistant bricks are widely used as checker bricks for regenerative furnaces, stoppers for pouring systems, and nozzle bricks. However, high alumina bricks are more expensive than fireclay bricks, so the latter should be used wherever they can meet the requirements.
Main Features of High Alumina Wear-Resistant Bricks:
- Excellent resistance to wear, erosion, and corrosion
- Cost-effective
- Suitable for use wherever the required refractoriness is met, offering an economical alternative to more expensive mullite-corundum bricks
High alumina wear-resistant bricks can also be customized based on the operating conditions of lime kilns and waste incinerators. For example, the previously common T3 standard brick with a thickness of 75 mm was increased to 100 mm. This increased thickness reduces the number of layers, thereby lowering friction frequency and significantly extending the service life of the bricks.
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