Liquid film flow and solid–liquid separation on a rotating inclined surface

Some fundamental aspects of liquid film flow on rotating inclined surfaces have been investigated, together with a novel method of solid liquid separation or wet classification not based on the principles of the more conventional methods of sedimentation or filtration. The separation or classification is achieved by feeding the slurry onto a rotating device, on which it is transformed into a liquid film flowing radially outwards and finally being discharged at its extremity. The design of the rotor is such that at least part of its surface is inclined away from its axis of rotation and as the liquid film flows down this surface, solid particles are removed from the liquid film by centrifugal force according to the physical properties of the liquid and the shape and density of the solid particles. [Continues.]