High Strength Ultra Low Cement Castable

Low cement castable is the castable whose CaO content less than 3%, usually the refractory cement dosage is from 3-8%, but high grade cement is needed to ensure the strength of the castable. Comparing to common refractory castable, low cement castable has better performance in high temperature, and require less water, it makes the castable has lower porosity and higher density. We have three classifications for low cement castable, bauxite based low cement castable, mullite based low cement castable and corundum based low cement castable. As we all know, mullite is a very good kind of refractory raw material, the Al2O3 content is not very high, but the strength, wear resistance and the stability in high temperature is better than bauxite.