Abstract: The invention relates to a dehydrating centrifugal sieve of small overall dimensions, small weight and big yield. The sieve is appropriated for dehydration, de-sludging, enrichment and classification of mineral grains.The sieve according to the invention has in a common housing (1) several conical sieve elements (2), (12), (13) disposed successively under each other and at the same time inside each other. Between particular sieve elements there are funnels (4) terminated at the bottom with a circumferential gutter (5). The circumferential gutter (5) is connected by pipe passages (6) situated in an offtake (7) of granular concentrate through a flow-off surface (9) with an offtake (10) of clarified liquid.

Abstract: A vibratory feeder with a transport chute mounted on a supporting frame and drive connected with said frame. The bottom of the transport chute is concave at said inlet means and convex at said outlet means has a shape similar to that of a horizontal stylized letter "S". A concave portion of the bottom of the transport chute is located near a feed delivery end, and a convex portion near a discharge end. The bottom of the chutes, its convex portion, is provided with a profile lining with a low coeficient of friction. The feeder has a built in screen in the convex portion of the bottom.

Abstract: The device for wet classification of a mixture of solid components with rect to size, according to the invention, has two circular chutes "2" and "2a" situated tangently next to each other at the same level and equipped with one common feeding nozzle "3". In the outer walls of the chutes "2" and "2a" in the region of their contact there is a distributing hole "5" in which, opposite the inlet of the feeding nozzle "3", there is the dividing wedge "6". The device has separate sieve planes "1" and "1a" fastened to the inner edges of the bottoms of the circular chutes "2" and "2a". A vibratory unit "7" is located on the central vertical axis of each sieve plane.

Abstract: Apparatus for gravity collection and handling of products from jiggers to watering devices, comprising two tanks filled with liquid and interconnected by a passage, and a discharge conduit connected to the inlet nozzle of a dewatering device.Inside the equalizing tank the liquid level is at least as high as that in the feeding tank. The outlet of the feeding tank is provided with the restrictor while the outlet of the equalizing tank is equipped with a regulating element. Granular material from the feeding tank flows through the outlet and falls by gravity into the communicating passage, wherefrom together with liquid supplied from the equalizing tank is fed via the discharge conduit to the inlet nozzle of the dewatering device.

Abstract: Method of separation of a mixture of mineral grains with differentiated sific gravity, under the conditions of a restricted sedimentation, in a cylindrical device, consists therein that the mixture A of the mineral with water is radially supplied to a trough 2 formed around the upper edge of the wall 1 of the water box. The mineral circulating in the trough 2 is desludged and partially separated according to the weight of the grains, and then, under pulsating action of the water, is displaced in a ring-shaped working trough along spiral trajectories towards the conduit 17 and 19 taking out the light fraction D and towards the conduits with a flap 16 for discharge of the heavy fraction C. The pulsating motion of the water is effected by compressed air being cyclically fed to the ring-shaped air chamber 6 via the pulsation valves 14 from a ring-shaped tank 5 arranged around the water box. From the air chamber 6 additional air chambers 7 extend radially beneath the sieve deck 7.

Abstract: A Baum Jig for gravitational enrichment of minerals, particularly hard co in which a screen deck is transversely located to the axis of the jig. Air chambers are made of plates as cut-outs of a cylindrical surface. The axes of symmetry are deflected from the perpendicular by an angle of 5.degree. to 15.degree. in the direction of the mineral to be enriched. The chambers are provided with asymmetric guide vanes adjustable in the horizontal direction. The side walls of a water cistern possess at the height of the screen decks, horizontal off-sets outside the cistern. Spring-loaded protection plates are provided in the off-set supports. The lower edge of one wall of each chamber is shaped as a conduit of back water provided from the bottom with a deflectable arched diaphragm.