某混合粗精矿铜铅分离选矿试验研究

Experimental study on the separation of copper and lead from a mixed coarse concentrate

混合粗精矿Cu品位8.51%、Pb品位15.23%;样品中黄铜矿、方铅矿包裹体较多,粒度较细,针对该样品性质,主要从浮选、重选角度进行铜铅分离试验研究,最终推荐粗精矿精选—铜铅分离(抑铅浮铜)—重选提高铅品位联合工艺流程;抑铅浮铜工艺采用自行设计的无氰、低铬、无污染组合抑制剂RBT-2,使铜、铅达到有效分离;最终可获得Cu品位21.50%、含Pb 4.57%、Cu回收率69.92%的铜精矿;Pb品位46.89%、含Cu 0.82%、Pb回收率55.39%的铅精矿。此流程中重选提高铅精矿品位工艺,使铅矿物得以富集,分离效果明显,获得了Pb品位大于40%的铅精矿。

The Cu grade and the Pb grade of the mixed crude concentrate is 8.51%and 15.23%,respectively.The inclusions of chalcopyrite and galena with fine grain size dominate the sample.According to the properties of the sample,the copper-lead separation experiment is mainly carried out from the perspective of flotation and gravity separation.Finally,a combined process of coarse concentration,copper-lead separation(suppressing lead floating copper),and gravity separation to improve the grade Pb is recommended.The self-designed combination inhibitor RBT-2,which is non-cyanide,low chromium,and pollution-free,is adopted to the lead-free copper float process to achieve effective separation of Cu and Pb.Finally,a Cu concentrate with a Cu grade of 21.50%,a Pb content of 4.57%,and a Cu recovery rate of 69.92%is obtained;a Pb concentrate with a Pb grade of 46.89%,a Cu content of 0.82%,and a Pb recovery rate of 55.39%is obtained.In this process,the gravity separation process improved the grade of Pb concentrate,thus enrich the Pb minerals,and the separation effect is obvious,the Pb concentrate with a Pb grade of more than 40%is obtained.