Pumping mineral froths utilising centrifugal pumps has typically presented major problems for users. Most of these problems have occurred due to incorrect application and selection of operating speeds.New horizontal froth pump designs now offer opportunities to greatly improve the pumping of froths while maintaining high efficiencies, simple selection procedures are presented along with tips and techniques to maximise froth pumping applications.
Vertical and horizontal centrifugal pumps have traditionally been used for pumping froth. Due to the added bulk of the froth, the size of the pump used for froth pumping needs to be larger than if the pump is being selected for a normal slurry duty without froth. Pumps with large intakes are necessary to pump froths due to the difficuties of drawing the froth into the pump.Horizontal froth pumps are preferred as they take up less floor space for their capacity, are easier to maintain and pump more froth flowrate than vertical pumps.