High aerating open flow type

DR flotation machines The mining industry has grown Principle of operation and developed over the years The Metso DR flotation machine is the first and has adapted itself to chang- mechanical open type machine to incorpoing economic conditions. One of rate a vertical circulation of pulp, made possible by combining a “recirculation well” with the changes has been the transi- the distinctive top feed impeller. tion from cell-to-cell type to open This arrangement provides positive vertical flow type flotation machines. circulation of pulp similar to the action in a The high aerating open flow type...

Immediately surrounding this air pipe is the pulp recirculation well which also leads to the open throat of the impeller. Air entering the cell is forced through the vertical curtain of re-circulating pulp and thus a positive airpulp mixing occurs in the eye of the impeller. This mixture is then subjected to the impeller and is expelled against the diffuser blades, which further mix and shear the air and pulp. The fluidizing action of vertical recirculation greatly minimizes the dense sands zone at the base of the cell and this also gives reduced interference to the pulp-air mixture as it discharges...

Shallow flotation in deep cells Above are illustrations of three flotation cells. Intense agitation and aeration occur in the mixing zone at the bottom of the cell. This mixing or vertical recirculation zone provides highly effective retention volume. It is within this portion of the flotation cell that intimate contact of the conditioned pulp and controlled air is made. The re-circulating pulp to the top of the pulp recirculation lifts the mineralized air bubbles hydraulically well. Here a calm separation zone is created. It permits floatable minerals to separate from those, which will not float,...

DR – Specifications Model Cell volume (1) m3 ft3 Connected motor (2) Air requirements (3) kW HP Am3/min kPag Acfm psig Active flotation volume Per cell and applicable up to 1.35 slurry sg. If higher slurry sg, consult Metso Per cell and applicable up to 1.35 slurry sg. If higher slurry sg, consult Metso Air requirement is at flotation bank air header, pressure losses from blower to flotation bank should be considered when specifying blower DR – Cell volumes & hydraulic capacities Size Maximum bank feed rate m3/h USGPM Maximum cells per bank section (1) Number of cells on same level between connecting...

Model Vol./ Cells/ A B C D 1) cell unit 2) (min) ft3 [m3] in [mm] in [mm] in [mm] in [mm] 1) From size 18 and above Single or Double side overflow. 2) Number of cells without Intermediate box. 3) Single cell drive. 4) Dual cell drive. 5) Length per cell.

• Metso Minerals Industries, Inc. 2715 Pleasent Valley Road, York, PA 17402, USA, Phone: +1 717 843 8671 • etso Minerals (South Africa) (Pty) Ltd. M Private Bag X2006, Isando, Johannesburg,1600, South Africa, Phone: +27 11 961 4000, Fax: +27 11 397 2050 • Metso Minerals (Australia) Ltd. Level 2, 1110 Hay Street, West Perth, WA 6005, Australia, Phone: +61 8 9420 5555, Fax: +61 8 9320 2500 • Metso Minerals (India) Pvt Ltd 1th floor, DLF Building No. 10, Tower A, DLF Cyber City, Phase - III, Gurgaon - 122 002, India, Phone: +91 124 235 1541, Fax: +91 124 235 1601 • Metso Perú S.A. Calle 5 Nro. 144,...