Method and apparatus of stratification with tangential feed

摘要

Method of separation of a mixture of mineral grains with differentiated specific 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.