The basic properties and fusibility of coal ash.

概要

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The requirement for the studies on the basic properties or thermal behavior of coal ash increases in the fields of coal gasification, liquidization, combustion or coal ash utilization. In this study, 24 coal ash samples were tested through chemical analysis, X-ray diffraction, TG-DTA and JIS melting test. In addition, ash model samples were prepared and tested to discuss the fusibility and the fusing behavior in the view of mineral composition of coal ash.<BR>The main mineral composition of coal ash in initial state were determined from low temperature ash samples, which were ashed with oxygen plasma asher, and the result was that they are quartz, kaoline, carbonates and sulfates of alkaline earth metals, iron compounds and feldspars. The transformation, thermal decomposition and interactions between these minerals were investigated by TG-DTA and hightemperature X-ray diffraction.<BR>From the experimental results of model samples, it became clear that the fusibility of coal ash is strongly dependent on the mineral composition of coal ash, and consequently the simulation of thermal behavior of coal ash became possible when mineral composition was taken into account.
一般社団法人日本エネルギー学会の論文