PNEUMATIC FLOATATION MACHINE Russian patent published in 2000 - IPC

FIELD: concentration of minerals by floatation method for coarse-grained floatation of ore and non-valuable raw material. SUBSTANCE: flotation machine includes flotation chamber with intake chute for concentrate and branch pipe for discharge of tailings, circular slotted sifting surface inclined towards intake chute, feeding unit made in form of hollow ring with inlet branch pipes fitted over its diameter and slotted outlet in its lower portion directed to slotted sifting surface. Outer wall of hollow ring is taper- shaped in its lower portion. Machine is provided with cone-shaped reservoir fitted with water supply branch pipe and slotted outlet over perimeter of base directed towards intake chute, pneumohydraulic aerator, parabolic reflector whose open part is directed towards pneumohydraulic aerator. Mounted inside hollow ring below level of its inlet branch pipes at spaced relation to outer wall of ring is distributing disk with cylindrical shell secured over outer diameter; clearance is provided over upper end face relative to cover of ring. Inlet branch pipes are tangentially engageable with disk and shell which are provided with perforations. Exit nozzle of pneumohydraulic aerator is located below level of upper edge f flotation chamber, parabolic reflector is mounted at spaced relation to walls of cone-shaped reservoir which is provided with circular cavity in its upper portion located at spaced relation to pneumohydraulic aerator and communicated with water supply branch pipe and cone-shaped reservoir. EFFECT: improved aerohydrodynamic mode of operation. 2 cl, 2 dwg