Special high alumina bricks are a type of refractory brick made from high-purity alumina, with excellent resistance to thermal shock, corrosion, and erosion. They are used in high-temperature applications such as steel-making furnaces, kilns, and incinerators, as well as in the construction of glass furnaces.
| Application | Cement kiln, Chemical Industry, Glass Kiln, Steel Kiln |
|---|---|
| Raw Material | Al₂O₃ |
| Refractoriness (℃) | 1790, 1820, 1850, 1880, 1920 |
| Size (mm) | 230*114*65mm, 230*114*75mm, As your requirements |
| Capacity | |
| Package | Stretch film + corner protectors + straps + trays |
Special high alumina bricks are made from raw materials that are selected for their high alumina content, such as bauxite, corundum, and high-purity alumina. The bricks are manufactured using a process called sintering, which involves heating the raw materials to high temperatures to fuse them together into a solid mass. The resulting bricks are extremely dense and have a high resistance to thermal shock, corrosion, and erosion.
| Item | RBTAL-36 | RBTAL-37 | RBTAL-38 | RBTAL-39 | RBTAL-40 |
| Refractoriness（℃） ≥ | 1790 | 1820 | 1850 | 1880 | 1920 |
| Bulk Density（g/cm3） ≥ | 2.40 | 2.45 | 2.50 | 2.60 | 2.70 |
| Apparent Porosity（%） ≤ | 18 | 18 | 17 | 17 | 16 |
| Cold Crushing Strength（MPa） ≥ | 55 | 60 | 65 | 70 | 72 |
| @1400°×2h Permanent Linear Change（%） | ±0.2 | ±0.2 | ±0.2 | ±0.2 | ±0.2 |
| @0.2MPa Refractoriness Under Load（℃） ≥ | 1550 | 1600 | 1620 | 1650 | 1680 |
| Al2O3（%） ≥ | 55 | 60 | 70 | 75 | 82 |
| Fe2O3（5） ≤ | 1.8 | 1.5 | 1.5 | 1.2 | 1.0 |
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