FLOATATION MACHINE Russian patent published in 2003 - IPC

FIELD: concentration of minerals by floatation method. SUBSTANCE: floatation machine has chamber, aeration unit with impeller located around bladed stator and connected with hollow shaft for delivery of air; foam layer volume and area regulator mounted in upper portion of chamber for vertical motion is made in form of cone whose vertex is directed downward. Circular chute is mounted additionally in center of chamber around base of cone at circular clearance with area of no less than 20% of area of cross-section of chamber; walls of this chute are located at angle no less than 10 deg. from vertical axis. Outer wall of chute is higher than inner wall. Circular chute is connected with foam chute by means of radial chutes. EFFECT: enhanced efficiency of floatation. 3 cl, 3 dwg _