The preheater recovers a large portion of the warmth in the ignition gasses, gets dried out and de-hydroxylates the bauxite and de-carbonates the limestone. The hydration responses of high alumina refractory cements are extremely mind boggling. The quality creating stages are monocalcium aluminate, dodeca-calcium hepta-aluminate and belite. Calcium aluminoferrite, monocalcium dialuminate, gehlenite and pleochroite contribute little to quality.
Source(S): http://mahakoshalrefractories.com/
