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RESEARCH PAPERS

Flame Imprinted Characteristics of Ash Relevant to Boiler Slagging, Corrosion, and Erosion

[+] Author and Article Information
E. Raask

Central Electricity Research Laboratories, Kelvin Avenue, Leatherhead, Surrey, United Kingdom

J. Eng. Power 104(4), 858-866 (Oct 01, 1982) (9 pages) doi:10.1115/1.3227356 History: Received June 02, 1981; Online September 28, 2009

Abstract

Pulverized fuel flames imprint marked characteristics on different particulate species which influence their subsequent behavior in boiler plant. The paper discusses some of the high temperature changes, namely, the transformation of irregularly shaped mineral granulates to spherical shapes found in ash, coal/ash interface behavior and the surface properties of semi-molten ash particles, combustion of the ash-rich coal particles, and the release of potassium from aluminosilicates. This is followed by a brief assessment of relevance of the findings to boiler slagging, corrosion and erosion.

Copyright © 1982 by ASME
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