PNEUMATIC FLOTATION MACHINE Russian patent published in 1994 - IPC

FIELD: enrichment of mineral resources. SUBSTANCE: machine has foam product centrifugal flotation cyclones 133 and 134 connected to branch pipes 4 and 126 for discharging a foam product of foam collecting chutes 3 and 125, this cyclones are similar to tailing cleaning cyclones 115. Cyclones 133 for recleaning the foam product of the main flotation are connected by their feed branch pipes 116 to branches 4 for discharging the foam product of foam collecting chute 3 of cylinder-conical chamber 1. Cyclone 134 for recleaning the foam product of cleaning flotation is similarly connected to branch pipes 126 of foam collecting chutes 125 of devices 120 for separating drain of cleaning operation cyclones 115. Side surfaces of conical deflectors are made in the form of a set of conical rings mounted in a spaced relation to each other through the height and partially inserted one into another. The diameter of the rings decreases to the vertex of the conical deflector. Each conical deflector has pneumohydraulic aerators on its wide part which are longitudinally positioned in series in two steps. The outlet axial holes of the aerators are directed to the vertex of the conical deflector on its inner side where a parabolic deflector is concentrically positioned. The open part of the parabolic deflector faces the pneumohydraulic aerators and the base of the conical deflector. The pneumohydraulic aerators are interconnected so as to connect the outlet nozzle of the first stage pneumohydraulic aerator directly to the inlet hole of the second stage pneumohydraulic aerator. Pneumohydraulic aerators 69 mounted on tube-shaped bleed 60 are positioned inside units each of which has adjacent pressure water manifolds and compressed air cavities, respectively, interconnected similar to circular units. The first stage pneumohydraulic aerator mounted on the conical deflectors of devices 120. 136 and 138 for separating the drain of cyclones 115, 133 and 134 into foam and tailing products is made in a tubular case with inlet and outlet bushes manufactured from a wear-resistant material, for example, siliconized graphite. The bushes have axial pressure water holes, the inlet bush has an expansion in the axial hole, the expansion, in turn, has tangential compressed air passages. The second stage pneumohydraulic aerator is an atomizer with water feed and air feed unions positioned in the cylindrical case with a water feed branch pipe. The atomizer is made in the form of a conical set of hollow coaxially positioned rings with slot outlets inside the atomizer. The rings are mounted in a spaced relation to each other and are interconnected by radial ribs and are in communication with the air feed branch pipe by tubes. EFFECT: improved structure. 17 dwg