Physical, chemical, mineralogical, and thermal properties of cenospheres from an ash lagoon

A small percentage of the particles, present in the pulverized coal ash, co nsists of thin-walled hollow spheres or cenospheres. Their quantity depends on the carbon and iron contents present in the ash. The apparent density o f these cenospheres is less than that of water and as such, they float on t he ash slurry when it is impounded in the ash ponds or lagoons. Cenospheres are being used in different industrial applications, mainly due to their l ow density, high strength, and good thermal properties. However. it is impo rtant and mandatory to study and characterize these ash particles for a bet ter and effective usage. As such, an effort. has been made in this paper to study physico-chemico-mineralogical and thermal properties of the cenosphe res obtained from an ash lagoon. (C) 2001 Elsevier Science Ltd. All rights reserved.