ABSTRACT
The Scrap Tire Management Council was established in 1990 by the North American tire manufacturers. The largest potential fuel market identified in this evaluation was cement kilns. To expand the use of scrap tires in cement kilns, the Council has prepared this report that describes the use, destruction, and energy recovery of whole or processed scrap tires in rotary kilns. Use of tires has decreased the carbon dioxide transported by the kiln which, in turn, allows room for additional oxygen to be used in the kiln. Tires can be introduced at the riser duct to the fourth stage preheater vessel through a double tipping valve. This tire feeding system, designed at the Southwestern Portland Cement facility at Fairborne, OH is in use by several cement kilns in the US The quality of the cement, whether using whole or shredded tires and regardless of the point of entry, is as good or better than when using only coal.
