Abstract
The flow characteristics of coal-oil-water mixture (COW) was investigated. COW was prepared by a disintegration of deashed coal agglomerates, which were obtained by the oil agglomeration of coal. When the volume fraction of dispersed waterdrops in COW was smaller than 0.2, the dispersed waterdrops influenced the flow characteristics of COW to the same extent as the dispersed coal particles. COW behaved as Bingham fluid. Both the yield value and Bingham viscosity increased with increasing total disperse phase volume fraction in COW, and with decreasing temperature. The relative viscosity of COW was well correlated by the equation derived with reference to Mooney's equation.
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