AERATOR OF PNEUMATIC FLOATATION MACHINE Russian patent published in 1995 - IPC

FIELD: concentration of mineral resources. SUBSTANCE: aerator is comprised of branch pipe 1 in its upper part and circular projection 2 on its internal surface while its lower part is provided with recess 3 and a plug 4 with a circular projection 5 and threaded point 6. Disposed between branch pipe 1 and plug 4 is rod 7 with threaded point 8 in the lower part and a flange 9 with holes 10 above the projection 2. Located in the same zone is a dispersing device in the form of two springs of smaller 11 and larger 12 stiffness. Spring 11 abuts against recess 3 and projection 5 while spring 12 has an outside diameter which is smaller than the inside diameter of spring 11 and is screwed on threaded points 6 and 8. Compressed air flows through branch pipe 1 into spring 11, overrides the resistance of spring 12 and penetrates into pulp in the form of bubbles through clearances between the coils of spring 11. As air supply ceases, spring 12 compresses thus forcing spring 11 to compress too and keeping the solid phase particles against penetrating into aerator. EFFECT: improved aeration parameters and increased reliability of aerator achieved by preventing clogging of dispersing device with particles of solid phase. 1 dwg