PNEUMATIC FLOTATION MACHINE Russian patent published in 2000 - IPC

FIELD: concentration of minerals by flotation method; coarse-grained flotation of ore and non- valuable raw materials. SUBSTANCE: flotation machine includes flotation chamber, slotted sifting surface, device for supply of coarse- grained feed to foam layer made in form of hollow ring with inlet branch pipes located tangentially over diameter of ring and slotted outlet from inner cavity in its lower portion. Outer wall of hollow ring is cone- shaped in its lower portion. Machine is provided with device for loading fine-grained pulp located along axis of chamber and made in form of vertical cylinder; this device is provided with intake ring-shaped shaped fitted with inlet branch pipes and having circular outlet to cylinder interior. Pipe-shaped mixer mounted along axis of flotation chamber is made in form of ejector whose upper portion is connected to lower end of cylinder. Machine is also fitted with branch pipe for discharge of chamber product, foam receiving chute, pneumohydraulic aerator unit, parabolic reflector coaxially secured under pipe-shaped mixer with circular clearance relative to its lower end. Inner cavity of coarse-grained feed supply device is tightly separated from inner cavity of ring-shaped intake chamber by means of cone-shaped wall; distributing disk is fitted inside hollow ring below level of inlet branch pipes at spaced relation to outer wall of ring. EFFECT: improved quality of flotation process due to improved aerodynamic mode of operation. 2 dwg