Cement Kilns

Cement Kilns use raw materials for manufacture (primarily limestone and clay) in a kiln where they are heated at high temperature to produce a ‘clinker’ which is then processed to produce a cement. Selected C&D Wastes and Mining and Quarrying Wastes have been progressively used to replace the raw materials, and selected combustible wastes (including tyres, SRF and hazardous Chemical Wastes) have been used to replace the coking coal traditionally used in firing the kiln process.

As all of the materials ultimately become part of the cement product the introduction of materials is carefully managed and monitored and materials need to meet defined specifications to ensure they do not compromise the process and the final product.