Inertial hydrodynamic particle–bubble interaction in flotation

The flotation rate of particles of different size and with different contact angles, provided by surface modification of the surface of broken quartz particles, with single monodisperse bubbles was investigated. A monotonic increase of collection efficiency was observed with increasing particle size at high particle hydrophobicity where attachment and stability are at a maximum. At smaller particle hydrophobicity the dependence of collection efficiency on particle diameter for E is interpreted as a manifestation of particle rebound. At the moment of inertial impact acol particle deforms the bubble surface, creates a water layer between particle and bubble and causes the particle to recoil from the bubble surface. These phenomena as well as the influence of centrifugal force were incorporated in a model of particle–bubble inertial hydrodynamic interac-tion complicated by bubble surface mobility. The purpose of this chapter is an experimental test of .the model based on the Generalised Sutherland Equation GSE, incorporating the angular dependence of attachment efficiency as well as the influence of hydrophobicity in the model. .Attachment is impossible at the bubble front pole angle us0 vicinity because of particle .rebound and at u)u u angle of tangency for the particle grazing trajectory because of thet