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 aluminate cement is used for high-grade refractory materials (corundum, mullite, chrome corundum and corundum spinel).
2.Water Glass Binder (Sodium Silicate)
Water glass binders are widely used. Acidic (siliceous, waxy), neutral (clay, high aluminum), alkaline (magnesium, magnesium chromium, magnesium aluminum), shaped and unshaped can be used.
3.Phosphoric Acid and Phosphate Binder
Phosphoric acid is used in phosphoric acid bonded refractory bricks, castables and fireclay; Aluminum phosphate is used for acid and neutral refractory; Sodium hexametaphosphate can be used as a binder for alkaline refractories.
4.Asphalt Binder
The asphalt binder is mainly used for the binder of carbon brick, magnesium carbon, aluminum carbon, aluminum silicon carbide carbon, aluminum magnesium carbon and magnesium calcium brick; Unshaped carbonaceous ramming material and gunshot mud binder.