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A study was made to investigate the fusibility behaviour of coal ashes of high ash fusion temperatures. Coals and ashes formed in the boiler were sampled in several Australian power stations, with laboratory ashes being prepared from the coals. The laboratory ashes gave lower values for the deformation temperature (DT) than the combustion ashes when the ash had low levels of basic oxide components...
The poor repeatability and reproducibility of fusibility temperatures of the ashes with high (SiO 2 + Al 2 O 3 ) levels are well known. A study was, therefore, made of such ashes using thermo-mechanical analysis (TMA) to indicate the shrinkage of samples progressively heated at the same rate as the test for standard ash fusibility temperatures (AFT). The results confirm that...
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