An Examination of The Influence of Ash on The Combustion Characteristics of Anthracites

[+] Author and Article Information
R. W. Bryers, Z. Kerekes

Applied Thermodynamics Department, John Blizard Research Center, Foster Wheeler Energy Corporation, Livingston, N. J.

J. Eng. Power 99(3), 348-360 (Jul 01, 1977) (13 pages) doi:10.1115/1.3446501 History: Received August 06, 1976; Online July 14, 2010


There is growing interest on the international scene in the use of high-ash anthracites as fuel for generation of steam and production of energy. The formation of mineral glazes has been reported on certain high-ash anthracites, thus inhibiting the combustion process and causing high carbon losses. To determine the degree to which these mineral glazes may influence the combustion characteristics of other anthracites, a study was made of anthracites collected from various locations in the world. Conventional analytic techniques, as well as thermal shocking tests, reactivity tests, and thermal analysis, were used to predict glaze formation and its influence on combustion. It is concluded that by carefully controlling coal fines, combustion can be improved and the formation of mineral glazes can be avoided in high-ash coals.

Copyright © 1977 by ASME
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