充气量和起泡剂对喷射式浮选机浮选效果的影响研究

Effect of Gas Rate and Frother on Flotation in Jet Flotation Machine

为更有效的利用喷射式浮选机,利用自制的喷射式浮选装置,以可燃体回收率作为浮选指标,研究了浮选中充气量和起泡剂浓度对精矿产率及灰分的影响规律,结果表明:在矿浆浓度和起泡剂浓度不变的情况下,充气量存在一个值为400L/h的临界参数,小于临界值,浮选精矿产率随充气量的增大而增加,大于临界值,效果变差;起泡剂浓度临界参数为0. 1mmol/L,在此浓度下,精矿产率高且灰分较低。因此,在喷射式浮选机工作过程中,控制充气量和起泡剂浓度,是调节精矿产率的重要方式。

In order to use jet flotation machine effectively,a jet flotation device was designed to study the influence factors on clean coal yield and ash,such as gas rate and frother. The results show that: there is a critical value of 400 L/h for gas gate when the pulp concentration and frother are stable,when the gas rate is below the critical value, the concentrate yield increases with the increase of the gas rate,while the effect turns otherwise when the rate is over 400 L/h. The frother also has a critical parameter of 0. 1 mmol/L,at which the clean coal ash is lower. Therefore,controlling the gas gate and frother during the operation of the jet flotation machine is an important way to adjust the concentrate yield.