PNEUMATIC FLOTATION MACHINE Russian patent published in 1998 - IPC

FIELD: mineral concentration by flotation method; may be used in coarse-grained flotation of metalliferous and nonmetaliferrous raw materials. SUBSTANCE: machine has flotation cell, screening surface, appliance for supply of coarse-grained feed into foam layer made in the form of hollow ring with inlet holes tangentially located over ring diameter and slit-like outlet from inner hollow in its lower part; appliance for loading of fine-grained pulp; tube-like mixer; outlet pipe for discharge of cell product; foam-collecting launder; pneumohydraulic aerator; parabolic deflector. Appliance for loading of fine-grained pulp has ring-shaped receiving chamber with inlet pipe located under appliance for supply of coarse-grained feed onto foam layer. Inner hollows of receiving chamber, appliance for supply of coarse-grained feed onto foam layer and appliance for loading of fine-grained pulp are conjugated with one another by means of annular passages. The first passage is made in bottom of cell and adjacent to its internal side wall. The second passage is screened from above and from side by means of ring-shaped deflector whose diameter exceeds the inner diameter of ring-shaped receiving chamber. Outer wall of ring in its lower part, directly above slit-like outlet is made cone-shaped. Appliance for loading of fine-grained pulp is located over cell axis and made in the form of cylinder whose walls are formed by ring inner wall. Mixer is made in the form of ejector whose upper part is connected with lower end of cylinder. Pneumohydraulic aerator is made in the form of unit and located coaxially above appliance for loading of fine-grained pulp. Deflector is coaxially secured under mixer with annular gap with respect to its lower end. Diameter of end part of deflector exceeds mixer end face diameter. EFFECT: improved quality of flotation process. 2 cl, 3 dwg