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Abstract
The removal of finely-divided prticles in alumina, silica and coal particles of average size of 5 microns in diameter has been investigated utilizing liquid fluidized and packed beds. The bed particles used included 40×100, 100×150 and 150×200 mesh silica and corundum particles. Important variables examined included surface charge, flow rate, pH and amount of bed particles
A mathematical model describing the concentration profile of fine particles in the axial direction in liquid fluidized beds has also been developed. The equation of continuity was solved using a forward finite differentiation technique. The application of this model to the scale-up investigation was discussed
The recovery of silica and coat fines was possible on corundum bed particles, while alumina fines was possible on silica beds as well as corundum bed particles due to electrostatic and van der Waals attractive forces. Fine particle recovery wasdirectly proportional to the total surface area of bed particles. The possibility of recycling bed particles after desorption of adsorbed fine particles was also studied.