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High Alumina Refractory Bricks for Industrial Furnace
Features

1. High Refractoriness: They can withstand very high temperatures, making them suitable for use in furnaces and other high-temperature environments.
2. Excellent Thermal Stability: These bricks maintain their structural integrity and mechanical properties even under rapid temperature changes, reducing the risk of thermal shock damage.
3. Good Insulating Properties: While not as effective as specialized insulating materials, high alumina bricks offer some insulation against heat transfer, helping to conserve energy in industrial applications.
4. Resistance to Corrosion and Abrasion: They are resistant to chemical corrosion and mechanical wear, prolonging their lifespan in harsh operating conditions.
5. Low Thermal Conductivity: This property helps to minimize heat loss and maintain consistent temperature profiles within the refractory lining.
Overall, high alumina bricks are valued for their durability, reliability, and ability to withstand extreme conditions in various industrial processes.
Application
High alumina bricks are commonly used in industries such as steel, cement, glass, and ceramics for their ability to withstand extreme temperatures and harsh conditions. Masonry blast furnace, hot blast stove, electric furnace top and ladle permanent lining.
Main physical and chemical performance index
Index | LZ-75 | LZ-65 | LZ-55 | LZ-48 |
Al2O3 % ≥ | 75 | 65 | 55 | 48 |
Refractoriness ℃ ≥ | 1790 | 1790 | 1770 | 1750 |
Refractoriness under load (0.6%) ℃ ≥ | 1520 | 1500 | 1470 | 1420 |
Permanent linear change (1500℃×2h) % | +0.1~-0.4 | +0.1~-0.4 | +0.1~-0.4 | +0.1~-0.4 (1450℃) |
Apparent porosity % | 23 | 23 | 22 | 22 |
CCS MPa ≥ | 53.9 | 49 | 44.1 | 39.2 |