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Experimental study on separation performance of red mud by parabolic cyclone

Liu Peikun;Wang Hui;Zhang Yuekan;Yang Xinghua;Jiang Lanyue;College of Mechanical and Electrical Engineering, Shandong University of Science and Technology;  
In order to address the problem of "underflow inclusion fine particles" of traditional cyclone, a parabolic cyclone is put forward, and the experimental study on swirl separation of red mud is carried out. The differences of separation performance between parabolic and straight-line cone cyclones, including split-strand ratio, product concentration, yield, particle size and grade efficiency, were explored. The influence of feed pressure and material concentration on separation performance of parabolic cyclones was also studied. The results show that with the increase of feed pressure, the-5 μm content in parabolic cyclone underflow is 26.48% less than that of straight-line type at maximum, and the highest removal rate of-5 μm fine mud of parabolic cyclone is 33.22% higher than that of straight-line type. With the increase of material concentration, split-strand ratio is lowered for the parabolic type, the underflow concentration of parabolic cyclone is slightly lower than that of straight-line type, but the separation particle size is larger than that of straight-line type, and the recovery rate of-5 μm underflow of parabolic cyclone is 12.06% lower than that of straight-line type. The highestremoval rate of-5μm sludge of parabolic cyclone is 6.09% higher than that of straight-line.
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