Study On Distribution Of Particles Base On Cyclonic Force Fields Of Flotation Column

Cyclonic static micro-bubble flotation column (FCSMC) has been widely applied inbeneficiation of minerals such as coal, lead, zinc, wolfram, nickel, molybdenum. iron, fluoriteand barite. In this column, a cyclonic separation mechanism is introduced innovatively withsound effect. However, the inner placed cyclone is working in an environment with highbackpressure which is different with normal cyclones, therefore its working principle stillneed further exploration.Separation mechanism of cyclone zone of FCSMC is concerned in this paper byanalyzing the particles distribution rule between the bottom reverse cone and the upper one.Firstly, experiments were conducted with pure minerals like quartz, magnetite and pyriteobtaining the same distribution result. At a certain height, particle size become coarser firstand then finer from the center to the outer wall. The following result shows that, particlebecome coarser with circulating pressure while shows little change with pulp height. Thisshows that circulating pressure influence more on particle distribution than pulp height.Then experiments were conducted with mixed particles of quartz and magnetite in a1:1ratio. A clear trend is that magnetite yield at the cyclone zone is lower than that of quartz.Meanwhile, magnetite yield decreases first and then increase from the center to outer wall.Size distribution of quartz is just the same with that of single quartz minerals while that ofmagnetite show a uniform trend across the radial direction. Also, particle distribution rule ofboth magnetite and quartz shows little change in the axial direction. In conclusion, yield ofhigh density magnetite particle is higher at low circulating pressure than that of highcirculation pressure and pulp height shows little influence on particle size distribution of bothminerals.