Abstract: A method for concentrating and dewatering fine-grained materials wherein the material is delivered by a feeder to the central portion of a pressing chamber in an arcuately shaped housing. A profiled sieve is mounted in the housing. An electric motor imparts a vertical-elliptical oscillatory motion to the housing at a frequency up to 160 Hz and at an amplitude from up to 5 mm.An apparatus for performing the aforementioned method, comprising a frame on which an electric motor is secured. A housing is supported by springs on the frame. The housing is arcuately shaped and a sieve extends along the whole length of the arcuately shaped housing. The sieve divides the housing into a pressing chamber and a dewatering chamber. In the bottom portion of the dewatering chamber there is provided a pipe for discharging liquid from the dewatering chamber. In the axes of the springs supporting the housing there are provided regulator bolts for limiting the amplitude of the vibratory motion of the housing.

Abstract: Apparatus for processing ore by a combined milling, froth flotation and size classifying operation, wherein A milling chamber contains elastomeric milling bodies situated between first and second screens. The milling chamber is provided with an agitating means for vertical vibration of the milling bodies. A first outlet on the milling chamber removes froth. A second outlet below the first and lowermost screen removes the coarser components.

Abstract: Material treating apparatus including one or more pneumo-hydraulic vibrators. The apparatus includes a container with cells separated by at least one valve lying on a supporting frame, the valve having a movable valve element which is urged toward its valve-closed position by the hydrostatic pressure and optionally also by springs. On one side of the valve there is an air cell connected with a source of air under pressure, and on the other side of the valve there is a second cell containing a liquid or a liquid suspension of material to be treated. When the air cell is subjected to air under pressure, the movable valve element vibrates and generates intensive vibro-pulsation turbulent streams in the liquid material in the second cell.