Predicting flotation rates using a rate equation derived from first principles

A flotation rate equation was derived from first principles by Yoon and Mao (1996) by considering both hydrodynamic and surface forces involved in bubble-particle interactions. In the present communication, the equation is used to predict flotation results as functions of several important parameters such as contact angle, double-layer potentials of air bubbles and particles, and bubble size. The predictions are consistent with experience, and can be explained in view of the various subprocesses considered in the model development. Furthermore, the model suggests optimum conditions for achieving maximum separation efficiency. (C) 1997 Elsevier Science B.V.