Clay fire bricks and high-alumina bricks are fundamental materials for industrial kilns. However, many users often face confusion when selecting them. This article will analyze the differences from the following three aspects to help you make the optimal decision.
1. Material Differences Between Clay Bricks and High-Alumina Bricks
Clay refractory bricks are mainly composed of 30%-48% alumina content. High-alumina bricks, on the other hand, use bauxite with an alumina content of over 48% as their main raw material.
Therefore, the refractoriness of high-alumina bricks generally reaches 1750-1790℃, while the refractoriness of clay bricks is usually in the range of 1580-1750℃.
Of course, clay bricks have better thermal shock resistance and a relatively low thermal conductivity. Therefore, they still have advantages in applications with frequent temperature fluctuations or where insulation is required.
2. Comparison of Clay fire Brick Types and Performance
Clay brick types mainly include ordinary clay bricks, low-porosity clay bricks, and alkali-resistant clay bricks.
Ordinary clay bricks are suitable for the working layer of general industrial kilns. Low-porosity clay bricks offer better high-temperature volume stability. Alkali-resistant refractory clay bricks are specifically designed to resist alkaline gas corrosion.
In contrast, high-alumina bricks have a higher alumina content and a higher load softening temperature, but their price is correspondingly higher. Furthermore, high-alumina bricks have better wear resistance. Therefore, they are more widely used in areas with severe material erosion, such as the transition zone of rotary kilns and the firing zone of cement kilns.
3. How to Make the Optimal Choice
Choosing between clay bricks and high-alumina bricks essentially involves finding a balance between performance requirements and cost budget.
Clay fire bricks are preferred when temperatures are below 1450℃ and corrosion is relatively weak. However, high-alumina bricks should be chosen for high-temperature, highly corrosive environments. Although the initial cost is higher, in the long run, it can reduce downtime for maintenance, resulting in better overall benefits.
Of course, making the right choice requires not only understanding the material properties but also communicating with professional suppliers. Choosing a reputable refractory brick manufacturer to ensure stable product quality is crucial for achieving the best cost-performance ratio.
Henan Ruitai Lianxin Refractory Materials Co., Ltd. has focused on refractory materials for 20 years. We not only provide customers with high-quality refractory bricks that meet quality standards, but also offer solutions tailored to specific kiln operating conditions.
If you have any needs for refractory materials, please feel free to contact us. We supply not only clay bricks, but also high-alumina bricks, corundum bricks, refractory castables, ramming mixes, and other high-quality refractory materials. Choosing Ruitai Lianxin means choosing strength.