CLF-type flotation machine Application Profiles coarse coarse CLF-type flotation machine - Beijing General Research Institute of Mining and Metallurgy Institute developed equipment for sulphide ore, the industrial production in the particle size is generally in the best flotation 10μm-100μm, more than this range, grain recovery will be reduced, to solve this problem, in recent years, successfully developed the CLF type coarse flotation machine, expanding the size range of flotation, the sulfide ore Selected size increased to 0.5mm, without reducing in recovery of fine- grained level, based on significantly increased +0.15 mm and +0.45 mm size fraction recoveries. The aircraft's structure shown in Figure, the impeller structure as shown: CLF-type flotation machine impeller with a high specific speed backward curved impeller blade shape is designed to lower the pulp through the flow line between the impeller blades is consistent with mixing weak, slurry circulation volume, low power consumption, with tank and plaid panels together can fully guarantee the suspension of coarse mineral and air dispersion. Movable grid plate gap of 33 - 35mm, bottom mounted at a distance of 1/3 groove depths, lattice panels make coarse mineral mineralized bubbles rise a short distance, make a shallow groove in the coarse-grained mineral flotation state, and reduce the turbulence of the slurry tank upper portion, to establish a stable separation zone and the foam layer. Slurry tank circulation passage can induce large cycle, to ensure the suspension of solid particles in a good condition and to the slurry was stirred several times through the impeller zone, floatable minerals increased chance of contact with the fresh air, while ensuring that the impeller zone in the slurry solids content and particle size significantly reduced, and contribute to flotation. The machine works as follows: When the flotation machine impeller rotates, low-pressure air from the blower into the hole through the distributor around the impeller blades, the same time false bottom below the lower impeller slurry is sucked into the impeller blades, the pulp and air mixing between the blades of the impeller, the peripheral part of the impeller is discharged from the discharged air mixture slurry by the stator steady stream through the grid plate into the upper tank area. At this point flotation pulp inside the area contains large bubbles, and the outer loop channel free of air bubbles within the slurry (or contain a very small amount of air bubbles ), so the pressure inside and outside the slurry is formed, in which pressure and suction force of the impeller, air bubbles in the pulp and the inner region of the flow rate set up together by the grid plate, the coarse particulate mineral to the grid plate side, formation of coarse particles suspended mineral layer, and the mineralized bubbles and slurry containing fine mineral particles continued to rise, mineralized bubbles rise to the formation of foam layer liquid containing fine mineral particles slurry separator is crossed by the circulation path, enter Join impeller recirculation zone. CLF type coarse particles flotation machine PBM long slope in Dachang tin industrial tests showed: in a case of ore particle size of 0.7mm, 0.15mm above purpose grain mineral flotation recoveries than 6A is 5% -16%; 0.15mm less grain than 6A purpose mineral flotation recoveries slightly higher than the 12.4% saving flotation machine 6A, the impeller and the stator can prolong life for more than 3 times. Increase in Daye Nonferrous Metals Company scheelite recovery applied research show that: CLF-type coarse flotation machine, put into coarse grinding process flow, reducing the useful minerals over crushed, the copper recovery rate of 1.67 % sulfur recovery rate of 0.571% of the cases, scheelite recovery rate from 5% to 27.7%, pine oil and xanthate dosage decreased 42.11% and 7.14%, each dealing with one ton of ore can save 1kWh .