论文部分内容阅读
为研究煤泥浮选过程中脉石矿物的夹带规律,进行了粗粒及细粒煤泥与高岭石掺配的浮选速度试验,并研究了粗粒及细粒级煤泥浮选中起泡剂用量、入料灰分、入浮质量浓度对高岭石夹带率及精煤灰分的影响。试验结果表明:煤泥浮选过程中,浮选精煤灰分表现出先减小后增大趋势,粗粒浮选精矿质量浓度高,脉石矿物的夹带程度不及细粒严重;起泡剂用量与入料灰分对粗粒及细粒夹带率影响较小,浮选质量浓度对其影响较大。浮选质量浓度由80 g/L降至40 g/L时,细粒夹带率由0.49降至0.25,精煤灰分由5.25%降至3.26%;粗粒夹带率由0.49降至0.41,精煤灰分由3.76%降至3.27%。
In order to study the entrainment law of gangue minerals during flotation process of coal slime, the flotation rate of coarse-grained and fine-grained slime and kaolinite was tested, and the effects of flotation of coarse and fine slime The amount of foaming agent, the content of ashes and the mass concentration of suspended particles on the entrainment rate of kaolinite and ash content of the refined coal. The results show that the ash content of flotation coal decreases first and then increases, the concentration of coarse flotation concentrate is high, and the entrainment degree of gangue minerals is less than that of fines; in the flotation process, In addition, the ash content had little effect on the entrainment rate of coarse grains and fine grains, and the flotation mass concentration had a great influence on it. When the flotation mass concentration decreased from 80 g / L to 40 g / L, the entrainment rate of fines decreased from 0.49 to 0.25, and the ash content of coal decreased from 5.25% to 3.26%. The entrainment rate of coarse particles decreased from 0.49 to 0.41. Ash decreased from 3.76% to 3.27%.