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以山西司马矿浮选入料为试验样品,进行了煤质分析和调浆转速探索试验、剪切调浆前后浮选速度的对比试验。结果表明:该煤样适宜浮选粒级0.250~0.125 mm、0.125~0.074 mm含量分别达到56.85%、20.70%;而不易浮选粒级即>0.5 mm、<0.045 mm粒级含量仅为0.65%、5.62%,所以该煤样可浮性较好。当调浆转速为1 950 r/min时,精煤灰分降低0.14%,精煤产率增加5.05%,可燃体回收率增加5.59%;适当的转速可以提高捕收剂油滴的分散度,并且高剪切调浆流态提供的强紊流流态大幅度提高煤粒与油滴的碰撞概率,促进油滴与煤粒的有效吸附,增强颗粒表面的可浮性。
Shanxi Sima ore flotation feed as the test sample, the coal quality analysis and speed test to test mixing, cutting slurry before and after the flotation speed comparison test. The results show that the suitable flotation particle size is 0.250 ~ 0.125 mm and the content of 0.125 ~ 0.074 mm is 56.85% and 20.70% respectively, while the flotation grade is not easy to be> 0.5 mm. The content of <0.045 mm fraction is only 0.65% , 5.62%, so the flotation of the coal sample is better. When the spinning speed is 1 950 r / min, the ash content of the refined coal is reduced by 0.14%, the yield of refined coal is increased by 5.05%, and the recovery of combustibles is increased by 5.59%. Appropriate revolving speed can increase the dispersion degree of collectors’ The strong turbulent flow regime provided by the high-shear slurry flow regime greatly increases the probability of collision between the coal particles and the oil droplets, promotes efficient adsorption of oil droplets and coal particles, and enhances the floatability of the particle surfaces.