Alkali resistant castable

Castable refractories that are resistant to alkali oxides (e.g., K2O and Na2O) at medium and high temperatures are called alkali resistant refractories. The composition of this type of castable is similar to that of common calcium aluminate cement, which is a mixture of alkali resistant refractory aggregate and powder, binder and admixture. Alkali resistant refractory castable has light and heavy parts, the porosity of more than 45% for light alkali resistant castable, porosity of less than 45% for heavy quality alkali resistant castable. And the heavy is divided into medium temperature alkali resistant castable and high temperature alkali resistant castable.