What is the difference between high alumina refractory brick and clay refractory brick?

1. The chemical PH value of high alumina refractory bricks belongs to neutral and alkaline refractory bricks, and clay refractory bricks belong to neutral and acid refractory bricks.

2. In addition to the thermal shock resistance of high alumina refractory bricks, other refractory bricks are not as good as clay refractory bricks. Generally, in the construction of kilns and other thermal equipment, if clay refractory bricks can be used, high alumina bricks are used for masonry.

3. High alumina refractory bricks are aluminum silicate refractory bricks with Al2O3 content greater than 48%. Clay refractory bricks refer to clay products with Al2O3 content of 30%-40% aluminum silicate materials.

4. Clay bricks have good thermal performance and are resistant to rapid cold and rapid heat; the firing temperature of high alumina refractory bricks depends on the sintering performance of the raw materials of bauxite.

5. The softening temperature of high alumina refractory bricks varies with the content of Al2O3. Clay refractory bricks have a low softening temperature, shrink at high temperatures, and have a thermal conductivity 15%-20% lower than silica bricks.