Abstract: The invention disclosed and claimed herein is a device for processing minerals and a method for its use, which device and method employ gravimetric principles to separate values in a feedstock from gangue, thereby allowing recovery or concentration of the values. The invention includes a table that receives and holds the feedstock, a chassis for supporting the table, and a mechanism for imparting a specific motion to the table, the motion being referred to as “compound cyclic,” which is a reciprocating, rectilinear, to-and-fro motion parallel to or coincident with the working axis of the table, combined with a simultaneous, continuous, and smooth vertical up-and-down motion that eliminates vertical jolting, jarring, or bumping.

Abstract: An improved disc dryer for aggregate material which operates by rotating and impacting a tilted pan which holds the material being dried. Increased capacity is attained by transverse stabilizers on the impactor assembly, adjustable pressure air shock mounts for variable amplitude control of the impactor assembly, sets of dual support wheels upon which the pan rotates a reinforced support tract on the underside of the pan, and an adjustable feed box for supplying material to the pan at varying locations.

Abstract: An improved disc dryer for aggregate material which operates by rotating and impacting a tilted pan which holds the material being dried. Increased capacity is attained by transverse stabilizers on the impactor assembly, adjustable pressure air shock mounts for variable amplitude control of the impactor assembly, sets of dual support wheels upon which the pan rotates a reinforced support tract on the underside of the pan, and an adjustable feed box for supplying material to the pan at varying locations.

Abstract: An improved disc dryer for aggregate material which operates by rotating and impacting a tilted pan which holds the material being dried. Increased capacity is attained by transverse stabilizers on the impactor assembly, adjustable pressure air shock mounts for variable amplitude control of the impactor assembly, sets of dual support wheels upon which the pan rotates a reinforced support tract on the underside of the pan, and an adjustable feed box for supplying material to the pan at varying locations.

Abstract: A concentrator comprises a beneficiating member (1) in the form of a bowl with a tapered bottom (2) a concavity of which is provided with a discharge hole (13), and a drive mechanism (5) a hollow drive shaft (8) of which accommodates eccentrically a shaft (10) carrying the beneficiating member (1) executing a circular movement about a radius equal to the eccentricity. In cross section the bowl is elliptical and is connected to a base (3) by flexible elements (12), whereas the concavity of the tapered bottom (2) is offset relative to its shaft (10). A tray (14) for finally concentrating the material is provided under the discharge hole (13).

Abstract: To separate minerals, they are mde up into a slurry applied through feed pipe 46 to a vertical-axis spiralinder 32 spinning on its axis to generate 10 g centrifugal force. The spiralinder is also subjected to axial vibration at 5 to 10 Hz. A film of slurry is held centrifugally to the internal surface of the spiralinder and kept in suspension by the vibration. The denser (i.e. higher specific gravity) particles in the slurry tend to be most firmly pinned centrifugally. The lightest particles thus drop first into the trough 44 and are dumped by switchable box 45. The centrifugal spinning is then slowed and the dense particles scoured off by wash water. The whole cycle is then repeated.

Abstract: To separate minerals, they are made up into a slurry A applied to a hollow tapered cylinder 301 spinning on its axis to generate 10 g centrifugal force. The cylinder 301 is also subjected to axial vibration at 5 to 10 Hz. The cylinder widens at a half-angle of 1.degree., and its axis is inclined at 2.degree. upwardly in the direction of widening. A film of slurry is held centrifugally to the internal surface of the cylinder and kept in suspension by the vibration. The denser (i.e. higher specific gravity) particles in the slurry tend to move preferentially radially outwardly (centrifugally) and to move downwardly in the boundary layer (under Earth's gravity). The action of the washing water B is to displace waste accidentally entrained with the higher-specific-gravity-particles. The valuable higher-specific-gravity particles overflow downwardly continuously at C and are collected.

Abstract: A spiral-type ore concentrating wheel has a plurality of interleaved, spiral bands tapering in height uniformly from the periphery of the wheel to its central, discharge aperture for moving concentrates to the aperture while the wheel is oscillated back-and-forth during advancement thereof in a predetermined rotated direction.