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 kind of castable is similar to that of common calcium aluminate cement, which is a mixture of alkali resistant refractory aggregate, powder and binder. Its alkali resistance mechanism is that it reacts with alkali metal oxide at high temperature to form a high viscosity liquid phase, forming a layer of enamelized protective layer to prevent the penetration and erosion of alkali metal melt.