Abstract
In two-deimensional and three-dimensional gas-fluidised beds of binary particle mixtures, cine-photographic measurements were made on the solids ejection phenomena induced by bubble eruption. Fine particles concentration in the bed and their elutriation rates were also measured. It was experimentally shown that fine particles contained in the bulge region are projected into freeboard and elutriated. Further, from the similarity of dependence of the estimated ejection mass flux based on this mechanism and of the measured elutriation rate on the bed height, the ejection mechanism of fine particles from the bulge region is also supported.
