High alumina bricks are a type of refractory brick that is made from high-purity alumina and other raw materials. They have excellent resistance to high temperatures and are often used in industrial applications such as furnaces, kilns, and other high-temperature environments.
| Application | Cement kiln, Glass Kiln, Other Kiln, Steel Kiln |
|---|---|
| Raw Material | Al₂O₃ |
| Refractoriness (℃) | 1770, 1790, 1820, 1850, 1880, 1920 |
| Size (mm) | 230*114*65mm, 230*114*75mm, As your requirements |
| Capacity | |
| Package | Stretch film + corner protectors + straps + trays |
High alumina brick is a type of refractory brick made from high-purity alumina and other materials. It has a high content of alumina, typically over 50%, which gives it excellent resistance to high temperatures, corrosion, and erosion.
High alumina brick can be classified into three categories based on their alumina content:
Low-grade high alumina brick (alumina content between 48% and 55%): Used in areas of moderate wear such as hot blast stove checkers, glass kilns, and coke oven roofs.
Medium-grade high alumina brick (alumina content between 55% and 65%): Suitable for areas of high wear such as blast furnace tuyere, cement kiln, and electric furnace roofs.
High-grade high alumina brick (alumina content between 75% and 85%): Used in the most severe conditions such as the hot zone of a blast furnace, the steel-making furnace, and the cement rotary kiln.
High alumina brick is commonly used in industries that require high-temperature resistance, such as steelmaking, cement production, glassmaking, and petrochemicals. It has many advantages such as high refractoriness, excellent thermal shock resistance, and low thermal conductivity.
| Item | SK-35 | SK-36 | SK-37 | SK-38 | SK-39 | SK-40 |
| Refractoriness（℃） ≥ | 1770 | 1790 | 1820 | 1850 | 1880 | 1920 |
| Bulk Density（g/cm3） ≥ | 2.25 | 2.30 | 2.35 | 2.40 | 2.45 | 2.50 |
| Apparent Porosity（%） ≤ | 23 | 23 | 22 | 22 | 21 | 20 |
| Cold Crushing Strength（MPa） ≥ | 40 | 45 | 50 | 55 | 60 | 70 |
| Permanent Linear Change（%） @1400°×2h | ±0.3 | ±0.3 | ±0.3 | ±0.3 | ±0.2 | ±0.2 |
| Refractoriness Under Load（℃） ≥ @ 0.2MPa | 1420 | 1450 | 1480 | 1520 | 1550 | 1600 |
| Al2O3（%） ≥ | 48 | 55 | 62 | 70 | 75 | 80 |
| Fe2O3（%） ≤ | 2.0 | 2.0 | 2.0 | 2.0 | 2.0 | 1.8 |
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