PNEUMATIC FLOTATION MACHINE Russian patent published in 1995 - IPC

FIELD: enrichment of mineral resources, and can be used at coarse-grained flotation of ores of non-ferrous, ferrous, rare-earth metals, non-metallic minerals and coal. SUBSTANCE: installed in the lower part of cylindrical chamber with a foam collecting gutter is a pulp charging device consisting of a feed pipe with a mixer, connected to which is a branch pipe used to feed aerated liquid. A pneumohydraulic aerator is installed on the branch pipe. A feed device in the form of a set of tapered rings is installed coaxially with the chamber in a spaced relation in height. The diameter of rings decreases to the chamber bottom, the pipe is installed in a spaced relation to the set and under it. The diameter of the lower ring exceeds the pipe diameter. A device in the branch pipe, coaxially with the latter, this device is used to feed coarse- grained material. Aerating devices in the form of pneumohydraulic aerators are installed in chamber walls in several points of chamber horizontal section. The aerator axes are directed towards the center of the pipe outlet. On the chamber pulp gets into the pneumatic cyclone through a pipe. Pulp partially aerated by means of the pneumohydraulic aerator is additionally aerated by it. In the feeder bubbles become larger and flotation complexes are formed. EFFECT: enhanced extraction of valuable components and specific production due to creation of optimum aerohydrodynamic conditions of flotation of particles of a wide grain size. 2 cl, 4 dwg