Froth Characteristics in Air-sparged Hydrocyclone Flotation

Abstract

Air-sparged hydrocyclone flotation is a new technology that has been under development during the past decade. This technology combines froth flotation principles together with the flow characteristics of a hydrocyclone such that the air-sparged hydrocyclone system can perform flotation separations in a matter of seconds or even less. The most important feature of the air-sparged hydrocyclone is its high specific capacity which corresponds to significant savings in capital cost (equipment and floor space). In air-sparged hydrocyclone flotation, the slurry is in swirl flow having high tangential and axial velocities. Both concentrate product (froth) and tailings are formed and discharged at high velocities. These unique fluid-flow features have a significant effect on the nature of the froth phase created and the corresponding transport properties. Froth characteristics and froth control as currently understood are emphasized in this chapter which reviews the state-of-the-art in air-sparged hydrocyclone flotation.