抛物线型旋流器分离赤泥性能试验研究

Experimental study on separation performance of red mud by parabolic cyclone

针对传统旋流器“底流夹细”的问题,提出一种抛物线型旋流器,并进行了旋流分离赤泥试验研究。探索了抛物线型和直线型锥体旋流器包括分股比、产物浓度、产率、粒度以及分级效率在内的分离性能差异,同时研究了给料压力、物料浓度对抛物线型旋流器分离性能的影响规律。实验结果表明,随给料压力的增大,抛物线型底流-5μm含量最高比直线型减少26.48%,且抛物线型-5μm细泥脱除率最高比直线型提高33.22%;随物料浓度升高,由于抛物线型分股比减小,抛物线型底流浓度略低于直线型,但分离粒度大于直线型,且抛物线型-5μm底流回收率最高比直线型降低12.06%,抛物线型-5μm细泥脱除率最高比直线型提高6.09%。

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 ou, 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 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.