Hardening Mechanism and Proper Storage of Phosphate Refractory Castables

Phosphoric acid hardly reacts with acidic oxides at room temperature and does not harden; therefore, it is not suitable as a binder for acidic refractories. Phosphoric acid reacts with amphoteric oxides (such as Al2O3) at room temperature to form a hard solid, and the reaction rate between them can be controlled, making it particularly suitable … Read more