低功率超声强化方铅矿-乙基黄原酸钾浮选体系

Enhancement of galena-potassium ethyl xanthate flotation system by low power ultrasound

研究在乙基黄原酸钾(KEX)存在的条件下利用超声提高方铅矿可浮性的可能性。为此,除表面化学研究外,还进行微浮选实验,包括测量不同超声功率水平和调节时间时的Zeta电势、接触角和气泡-颗粒粘附时间。研究结果表明,当超声功率为30 W、调节时间为2 min时浮选回收率最大,为77.5%。另外,使用超声后获得更负的Zeta电势、更大的接触角和更短的气泡-颗粒粘附时间,表明超声作用使方铅矿的疏水性增加。

The objective of this study is to investigate the improvement possibilities of the floatability of galena with ultrasonic application in the presence of potassium ethyl xanthate(KEX). For this purpose, micro-flotation experiments were carried out in addition to surface chemistry studies including zeta potential, contact angle, and bubble-particle attachment time measurements at various ultrasonic power levels and conditioning time. The results showed that, the maximum micro-flotation recovery of 77.5% was obtained with 30 W ultrasound power and 2 min conditioning time. In addition, more negative zeta potential values were obtained with ultrasound as well as higher contact angle and lower bubble-particle attachment time, which indicated the increased hydrophobicity of galena with ultrasound.