煤泥浮选调浆过程能量输入优化研究

Energy input optimization for slurry conditioning of coal slime flotation

浮选调浆过程中能量输入既会促进煤泥吸附捕收剂,也会使捕收剂从煤泥颗粒表面脱附,是影响浮选效果的关键因素。以临涣选煤厂浮选入料为研究对象,探究叶轮搅拌转速、搅拌时间、煤油浓度等因素对浮选过程中捕收剂吸附率、煤泥表面积利用率、浮选回收率等指标的影响机制。随着叶轮搅拌转速和搅拌时间增大,捕收剂吸附率、煤泥表面积利用率和浮选效率均先增大后减小。随着煤油浓度增大,捕收剂吸附率和浮选效率先增大后减小,而煤泥表面积利用率逐渐增大后稳定。

The energy input during the flotation conditioning will both promote both the adsorption and desorption of collector on coal particle surface, which is a key factor affecting the flotation performance. Taking flotation feed from Linhuan Coal Preparation Plant as the research object, the effects of the impeller stirring speed, stirring time and kerosene concentration on the collector adsorption rate, surface area utilization rate of coal particle and flotation rate in flotation process were investigated, respectively. The results show that, with the increase of impeller stirring speed and stirring time, the adsorption rate of collector, surface area utilization rate of coal particle and flotation rate firstly increases and then decreases. Meanwhile, the adsorption rate of collector and flotation efficiency increases and then decreases with increasing of kerosene concentration in the studied scope. In addition, the surface area utilization rate of coal slurry gradually increases and then keeps constant.