Flow characteristics of a coal-oil-water mixture prepared by disintegration of de-ashed coal agglomerates

The flow characteristics of a coal- oil-water mixture (COW) were investigat ed. COW was: prepared by disintegrating de-ashed coal agglomerates that had been obtained by oil agglomeration of coal. When the volume fraction of di spersed waterdrops in COW was smaller than 0.2, the dispersed waterdrops ha d a similar effect to that of the dispersed coal particles on the flow char acteristics of COW. COW behaved as a Bingham fluid. Both the yield value an d Bingham viscosity increased with increases in the total disperse-phase vo lume fraction in COW and with decreases in temperature. The relative viscos ity of COW was well-correlated by an equation derived from Mooney's equatio n.