Nature protection technologies

3.2.3.3. Segregation, classification and dewatering of slag and bottom ash

Part 3. ASH AND SLAG HANDLING

3.2. Ash and slag handling systems at TPPs

3.2.3. Bottom ash/slag removal

3.2.3.3. Segregation, classification and dewatering of slag and bottom ash

J.J. Hycnar, Ecocoal Consulting Center, Katowice, Poland

P. Pasiowiec and J. Brożyna, Progress Eco S.A., Dobrów, Poland

 The purpose of dewatering and classification of slag from hard coal combustion is the elimination of slag hydro-transport to disposal lagoons thus reducing  water consumption as well as costs of hydro-transport and storage of water-slag or water-ash-slag suspension  and of slag aggregates’ production. The developed technology is based on application of centrifugal sieves, enabling not only slag dewatering but also its classification and removal of remaining bottom ash and cenospheres.