醇类起泡剂对细粒级尾矿浮选回收铜的影响及机理分析

摘要

选用非极性基结构不同的醇类起泡剂MIBC和松醇油作为起泡剂回收江西某铜矿矿石中的有价金属铜.通过浮选试验和泡沫时间-体积试验,测定铜的品位、回收率及泡沫体积随时间的变化情况,研究醇类起泡剂对细粒级尾矿浮选回收铜的影响及作用机理.结果表明,MIBC起泡能力强,增大了气泡与目标矿物的碰撞黏附概率;当MIBC用量为30 g/t时,一次粗选铜回收率可达30.19％;在相同浓度条件下,MIBC产生的泡沫体积大,增大了与脉石矿物的碰撞概率,因此精矿品位低.%MIBC and pine oil,two different nonpolar base structure of alcohols frother were used to recover valuable metals copper from a Jiangxi copper ore.By flotation test and bubble time-volume test,we determined how the grade of copper,recovery rate and bubble volume changes with time,and we studied the effect of alcohols frother on the recovery of copper from fine tailings and its mechanism.The result showed that MIBC had a stronger foaming ability and increases the collision probability of bubble and target minerals.When the dosage of MIBC was 30 g/t,the recovery rate of copper could reach 30.19％.At the same concentration,MIBC produced a bigger volume bubble,increased the collision probability of bubble and gangue minerals,therefore the concentrate grade is low.