FLOTATION MACHINE Russian patent published in 1997 - IPC

FIELD: mineral concentration; ore flotation. SUBSTANCE: the offered flotation machine has body with foam threshold and aeration unit which consists of driving shaft mounting coaxial blade impeller, circulating pipe with recirculating branch pipes located on its surface and communicating its hollow with body hollow, and having coaxially installed pressure branch pipe embracing impeller and carrying guide device with inclined channels which similarly to circulating pipe are located, at least, in lower part of circulating pipe at acute angle to contour of its cross- section and directed with outlets to its internal surface oriented to the side opposite to rotation of impeller. Open area of guide device is not less than that of pressure branch pipe. Additionally flotation machine is provided with screen made in form of bushing installed on pressure branch pipe below the guide device. Maximum outer diameter of bushing is not less than the outer diameter of guide device. EFFECT: higher efficiency. 3 cl, 4 dwg, 1 tbl