High Alumina Refractory Bricks from China Suppliers - Durable Solutions for Industrial Furnace Manufacturing
Features
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 |
Frequently Asked Questions
Q: What is the refractoriness limit of High Alumina Bricks?
High alumina bricks exhibit high refractoriness depending on their grade, ranging from ≥ 1750 ℃ for LZ-48 up to ≥ 1790 ℃ for LZ-75 and LZ-65 grades, making them ideal for high-temperature applications.
Q: Where are High Alumina Bricks typically applied?
They are commonly used in the steel, cement, glass, and ceramics industries. Typical installations include masonry blast furnaces, hot blast stoves, electric furnace tops, and ladle permanent linings.
Q: How do High Alumina Bricks handle rapid temperature changes?
These bricks feature excellent thermal stability, which allows them to maintain structural integrity and mechanical properties under rapid temperature fluctuations, significantly reducing thermal shock damage.
Q: What is the Al2O3 percentage range in these bricks?
The Al2O3 content varies by grade: LZ-75 contains ≥ 75%, LZ-65 contains ≥ 65%, LZ-55 contains ≥ 55%, and LZ-48 contains ≥ 48% alumina.
Q: Do High Alumina Bricks provide insulation?
Yes, they offer good insulating properties and low thermal conductivity. While not as insulating as specialized materials, they help minimize heat loss and conserve energy in industrial processes.