Common refractory binders include calcium aluminate, phenolic resin, silica sol, calcium silicate, sodium silicate, phosphoric acid and phosphate. 1. Calcium Aluminate Cement Calcium aluminate cement is mainly used as a binder for refractory castables and shotcrete; Ordinary calcium aluminate cement is used for medium and low-grade refractory castables (clay and high alumina), and pure calcium […]