High Alumina Composite Brick
High Alumina Composite Brick is an insulating and energy-saving composite refractory product manufactured from high-alumina bauxite, bonding clay, and fine alumina powder as the principal raw materials.
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Erosion resistance
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Thermal shock resistance
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Energy saving
Product Introduction
High Alumina Composite Brick is an insulating and energy-saving composite refractory product manufactured from high-alumina bauxite, bonding clay, and fine alumina powder as the principal raw materials. Produced through a dual-layer batching design, integral molding, and high-temperature sintering process, the brick combines the advantages of both refractory performance and thermal insulation within a single unit.The product effectively reduces heat loss, improves thermal efficiency, and extends furnace service life, making it particularly suitable for modern industrial furnaces requiring energy conservation and environmental protection.
Product Specifications
| Index | HWLZF-75 | HWLZF-80 | ||
| Working layer | Composite Layer | Working layer | Composite Layer | |
| Al2O3（%） ≥ | 75 | 45 | 80 | 45 |
| Fe2O3（%） ≤ | 2 | 3 | 1.8 | 3 |
| Bulk Density（g/cm3 ） | ≥ 2.6 | ≤ 2.3 | ≥ 2.65 | ≤ 2.3 |
| Apparent Porosity（%） | ≤ 24 | 26-30 | ≤ 21 | 26-30 |
| Cold Compressive Strength（MPa） ≥ | 60 | 20 | 60 | 20 |
| 0.2MPa Refractoriness Under Load（T0.6 ℃) ≥ | 1500 | - | 1500 | - |
| Permanent Linear Change（1350℃）（%） | -0.4~0.2 | - | -0.4~0.2 | - |
- Grade:
- HWLZF-75
- HWLZF-80
