Fine particle flotation machine impeller with three-layer structure

Abstract

The invention provides a fine grain flotation machine impeller of a three-layer structure, and relates to the technical field of ore dressing. The impeller comprises a framework disc, the outer end face of the framework disc is provided with a connecting flange used for being installed with a power component of the flotation machine in a matched mode, and the inner circumferential face of the framework disc is provided with a circle of outer-layer blades which are evenly arranged at intervals. A closed ring is arranged at the end, away from the connecting flange, of the framework disc, the bottom ends of the outer-layer blades are arranged on the inner side of the closed ring, and a circle of inner-layer blades are evenly arranged on the outer side of the center hole in the framework disc at intervals. A circle of middle blades which are evenly arranged at intervals and fixedly connected with the inner end face of the framework disc are arranged between the outer-layer blades and the inner-layer blades. The structure of the outer-layer blade, the framework disc and the closing plate forms a gradually-shrinking closed flow channel, so that the initial kinetic energy and local turbulent kinetic energy of mineral particles and bubbles are increased, the collision mineralization probability of the bubbles and the mineral particles is increased, the pressure at the outlet of a gradually-shrinking opening is released, nano-bubble precipitation is facilitated, and the recovery of micro-fine particle mineralization is improved.

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