某铜冶炼渣浮选回收铜工艺试验研究

Reclaiming Copper Resource from Copper Smelting Slag by Flotation Approach

对某含铜2.70%的铜冶炼渣进行了浮选回收铜的试验研究。结果表明,浮选过程中添加硫化钠作为调整剂,并采用中矿集中再选后尾矿分级的工艺流程,可减少一段扫选,降低中矿含泥量,闭路试验获得了铜品位20.59%、回收率91.75%的铜精矿,综合尾矿铜品位降至0.26%。

Flotation technique was introduced to reclaim copper resource from a copper smelting slag with Cu grade of 2.70%.With sodium sulfide as the regulator,the scavenger middling was collected for flotation and its tailings were classified into a size range of+20μm to return,together with the cleaning concentrate of middling,to the quick flotation stage.With this optimized flowsheet,a stage of scavenging can be dislodged and the mud content in the middling can be reduced.Finally,a closed-circuit test produced a copper concentrate grading 20.59%Cu at 91.75%recovery,and the tailings with Cu grade reduced to 0.26%.