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AssigneeCentralny Osrodek Projektowokonstrukcyjny Maszyn Gorniczych "Komag"
InventorsAntoni Jedo, Waclaw Jachna, Adolf Szczesny
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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.
A method for separation of a mixture of mineral grains having different specific gravities comprising introducing a raw mixture of mineral grains with water tangentially at the outer wall of a trough with an initial velocity to produce circulation of the stream of the mixture at least near an upper edge of said outer wall along a path around a central axis causing the mineral grains to selectively flow along spiral trajectories within the trough from the outer wall towards the central axis in accordance with the specific gravities of the grains, supplying pulsating water into said trough in alternate upward and downward direction to facilitate separation therein of the grains into light and heavy fractions along said spiral trajectories and discharging the separated light and heavy fractions separately into the region of the central axis in the trough.
Apparatus for separation of a mixture of mineral grains having different specific gravities comprising a vessel having an upright outer wall of substantially cylindrical shape, a conically tapered second wall in said vessel defining with the upright wall an annular air chamber which is open at the bottom thereof, said outer wall having an upper end in the form of a trough which is open inwardly towards the central axis of the vessel, means for introducing a raw mixture of mineral grains with water tangentially into said trough to produce circulation of the grains and flow thereof inwardly along spiral trajectories in accordance with the specific gravities of the grains, means including a receiver for discharging a light fraction received at the trough in the region of said central axis, a sieve deck in the form of an inverted truncated cone having an outer edge supported on said second wall and an inner edge supported on said receiver, the heavy fraction of grains descending onto said sieve deck and flowing towards the central axis, means for discharging the heavy fraction from the sieve deck in the region of said central axis, and means for pulsating water in said vessel to facilitate separation of the grain into the light and heavy fractions comprising an annular surge tank for compressed air surrounding said outer wall beneath said trough, an annular collector for expanded air beneath the surge tank and air pulsator means coupled to said air chamber.
Dependencies are inferred from the claim text.