Abstract
Power ultrasound may be used in the processing of minerals to clean their surfaces of oxidation products and fine coatings,
mainly through the large, but very localised, forces produced by cavitation. Results of the application of power ultrasound to
remove iron-rich coatings from the surfaces of silica sand used in glass making and to improve the electrostatic separation of
mineral sand concentrates through lowering the resistivity of the conducting minerals (ilmenite and rutile) are presented