Abstract:

The formation, micromorphology characteristics and heavy metals enrichment of fine particles generated during coal combustion were studied.The particles were sampled by using impacting classifier, the micromorphology was examined with SEM and the heavy metals content was measured with atomic absorption spectrophotometer.The results indicated that the morphology and heavy metals enrichment of the particles were related to the particle size.Coarse particles commonly showed irregular shapes,while particles were closer to spherical shape with decreasing size.Submicron particles were always spherical and usually attached to big ones.The heavy metals content of the particles increased with decreasing particle size.