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Rheological properties of selected bituminous coals

✍ Scribed by Richard B. Read; Philip J. Reucroft; William G. Lloyd

Publisher
Elsevier Science
Year
1985
Tongue
English
Weight
646 KB
Volume
64
Category
Article
ISSN
0016-2361

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✦ Synopsis

The rheological behaviour of several bituminous coals has been evaluated by means of a constant torque Gieseler plastometer, utilizing both steadily increasing (3Β°C min-') and isothermal (410Β°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 3Β°C min-', 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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