Rheological properties of selected bituminous coals |
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| Authors: | Richard B Read Philip J Reucroft William G Lloyd |
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| Affiliation: | 1. Department of Metallurgical Engineering and Materials Science, University of Kentucky, Lexington, KY 40506, USA;† Ogden College of Science, Technology and Health, Western Kentucky University, Bowling Green, KY 42101, USA |
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| Abstract: | The rheological behaviour of several bituminous coals has been evaluated by means of a constant torque Gieseler plastometer, utilizing both steadily increasing (3 °C min−1) and isothermal (410 °C) temperature conditions. The results indicated that under either thermal treatment, the coals investigated showed predominantly pseudoplastic behaviour. The greatest degree of non-Newtonian behaviour occurred at or near the temperature of maximum fluidity for coals heated at 3 °C min−1, or within the early stages of melting when isothermal heating was used. Empirical relationships relating the Gieseler fluidities to apparent viscosity were derived from the data. |
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| Keywords: | rheological properties bituminous coals |
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