FLOTATION MACHINE Russian patent published in 1996 - IPC

FIELD: concentration of minerals. SUBSTANCE: flotation machine has at least one chamber, hollow shaft, blade axial impeller, damping plates on sides of chamber, pipe with pulp circulation openings and devices for supplying basic materials and discharge of foam and chamber products. Blades are turned relative to their radial axes, with angle of rotation α = 20-45^° of end edges being within 20-45 deg. Blades are provided with upper end projections and are inclined to bottom or arranged alternately in vertical and inclined position, or blades may have two portions, of which one is horizontal portion adjoining to shaft and other is inclined portion. Upper end projections are made bent or formed as plates inclined towards countercurrent flow at an angle β = 5-25^° of 5-25 deg, with peripheral ends being parallel to walls. Air channels made on rear side of axial impeller blade are communicated through hollow shaft with atmosphere. EFFECT: increased efficiency and enhanced reliability in operation. 2 cl, 5 dwg