AERATOR Russian patent published in 2000 - IPC

FIELD: concentration of minerals; aeration devices; metallurgy, mining, chemical and other industries. SUBSTANCE: aerator includes hollow shaft with air supply branch pipes and hollow truncated cone mounted on this shaft and provided with holes in lower base and projections and slots evenly distributed over lateral surface of cone at its lower base; height of slots does not exceed 1/3 of length of projections. Aerator slots are located over generatrices of truncated cone and their height is no less than 1/6 of height of cone. Total area of slots is no less than 30% of sectional area of outlet hole of air supply branch pipe. Truncated cone is provided with cylindrical shell at its lower base. Projections are provided with recesses of different sizes; they are located above slots. Slots on adjacent projections are arranged in staggered order. Slot may have trapezoidal form with lower base at the top. Plate for guiding the air flow may be provided in lower portion of slot. Slot may be located immediately behind projections, with no clearance opposite rotation of hollow cone. EFFECT: smooth distribution of air over taper surface of aerator. 6 cl, 4 dwg