High alumina bricks are high-quality refractory materials with alumina content typically between 48% and 90%. These refractory bricks can withstand high-temperature environments of different industrial sectors. Kerui Refractory can provide you with the high aluminum bricks you want!
Kerui Refractory high alumina brick is a type of refractory brick, that primarily consists of alumina (Al2O3). Because of the high alumina content in the fire brick, it can enhance thermal insulation, improve resistance to thermal shock, and increase fire refractoriness. Meanwhile, this refractory brick effectively protects the structural integrity of industrial equipment by avoiding heat loss and resisting chemical corrosion.
| Item/Grade | LZ-80 | LZ-75 | LZ-70 | LZ-65 | LZ-55 | LZ-48 | LZ-75G | LZ-65G | LZ-55G | ||
|---|---|---|---|---|---|---|---|---|---|---|---|
| ω (Al2O3)/% | μ0 ≥ | 80 | 75 | 70 | 65 | 55 | 48 | 75 | 65 | 55 | |
| σ | 1.5 | ||||||||||
| Apparent Porosity/% | μ0 ≤ | 21 (23) | 24 (26) | 24 (26) | 24 (26) | 22 (24) | 22 (24) | 19 | 19 | 19 | |
| σ | 1.5 | ||||||||||
| Cold Crushing Strength/MPa | μ0 ≥ | 70 (60) | 60 (50) | 55 (45) | 50 (40) | 45 (40) | 40 (35) | 65 | 60 | 50 | |
| Xmin | 60 (50) | 50 (40) | 45 (35) | 40 (30) | 35 (30) | 30 (35) | 55 | 50 | 40 | ||
| σ | 15 | ||||||||||
| 0.2MPa Refractoriness Underload/℃ | μ0 ≥ | 1530 | 1520 | 1510 | 1500 | 1450 | 1420 | 1520 | 1500 | 1470 | |
| σ | 13 | ||||||||||
| Permanent Linear Change/% | Xmin Xmax | 1500℃*2h -0.4~0.2 | 1450℃*2h -0.4~0.1 | 1500℃*2h -0.2~0.1 | 1450℃*2h -0.2~0 | ||||||
SK36 fire bricks have an alumina content of around 55-65%. These refractory bricks offer good thermal stability and high mechanical strength, which have wide applications in the lower temperature zones of industrial furnaces, such as hot blast stoves and blast furnaces.
SK37 bricks are a type of refractory brick with an alumina content of approximately 65-70%. They are suitable for use in moderate temperature applications. SK37 high alumina refractory bricks are commonly suitable in various industrial furnaces, such as reheat furnaces, and heating furnaces.
SK38 bricks have a higher alumina content of 70-82%. They show superior thermal shock resistance and can withstand higher temperatures compared to SK36 bricks. SK38 high alumina bricks are suitable for applications in areas of high thermal stress, such as steel ladles, cement rotary kilns, and electric arc furnaces.
SK40 bricks have an alumina content of approximately 82-90%, which have excellent wear resistance and chemical resistance. These bricks have a wide range of applications in the hottest areas of industrial furnaces, such as the burning zone of cement rotary kilns and the transition zone of lime kilns.
The main raw material used for high alumina fire brick is Bauxite, which is a natural mineral rich in alumina. At the same time, other materials and additives may be included to enhance specific high alumina bricks properties. The general raw material composition of these refractory bricks for sale includes:
Binders and the exact high alumina bricks chemical composition can vary based on the manufacturing process and detailed performance requirements of the high alumina bricks. Therefore, careful control of the chemical composition of the fire bricks is crucial to ensure refractory properties, thermal stability, and wear resistance in high-temperature applications.
This refractory brick has more alumina content and better slag resistance, which is suitable for molten metal or other corrosive materials.
These bricks have low thermal conductivity, which helps to minimize heat transfer and improve the overall thermal efficiency of industrial processes.
This brick has a high Al2O3 content, so their load-softening temperature is high. As such, they withstand high temperatures while maintaining structural integrity.
These bricks have a long service life due to their ability to withstand high temperatures. Meanwhile, it reduces the need for frequent maintenance.
These fire bricks have excellent thermal stability. They can maintain mechanical strength even when subjected to rapid temperature changes.
The fire resistance of these bricks is higher than silica bricks. The refractoriness of alumina fire bricks is from 1750°C (3182°F ) to 1790°C (3254 °F).
The cement industry widely used these bricks, specifically in cement kilns. For instance, the bricks are suitable for the burning zone, transition zone, and cooler areas of the kiln, where they endure high temperatures, chemical corrosion, and thermal shock.
Hot blast stoves are essential in the iron and steel industry. Besides, these refractory bricks are suitable for lining the combustion chamber and the hot blast stove stack, where they can withstand high temperatures and corrosive gases.
Fire bricks are appropriate for applications in the non-ferrous industry which includes copper smelting and refining furnaces. In addition, they offer excellent resistance to chemical corrosion and high-temperature conditions, to ensure long-lasting performance.
High alumina refractory bricks are suitable for lining the lower part of the blast furnace, known as the hearth and bosh. As a result, they can provide excellent resistance to high temperatures, mechanical stress, and chemical attack.
Ladles and tundishes are molten metal in the transporting and casting of the steel industry. Meanwhile, these vessels consist of refractory bricks that provide insulation and protection against high temperatures and chemical reactions.
These bricks are essential in glass manufacturing processes including glass tanks, and regenerators. So they show excellent thermal shock resistance, which allows them to withstand rapid temperature changes in glass production.
Generally, high alumina bricks price is higher than clay fire bricks due to their superior refractory properties. But as a refractory brick manufacturer in China, Kerui Refractory will offer you cheap fire bricks. For accurate and up-to-date pricing information, Contact us now!
Kerui is a manufacturer with more than 20 years of experience in producing high-alumina brick. We have professional technicians who can provide professional project guidance. If you are looking for high alumina brick, you will choose KERUI.