Enhanced recovery of associated gold resource from a copper-lead multi-metal sulfide ore was achieved by a combined process of Cu & Pb bulk flotation plus copper depressing and lead floatation. Gold was efficiently captured by the collector Z-200 (30 g/t) in the weakly alkaline (pH=9) medium during the Cu & Pb bulk flotation. Gold was further enriched in the copper concentrate by the pre-removing reagent sodium sulfide (4000 g/t) and the lead collector diethyldithiocarbamate (30 g/t) in the following Cu & Pb separation step. In closed-circuit tests, a gold-bearing copper concentrate containing 18.69% Cu and 42.70 g/t Au was obtained. The recovery was 92.58% for Cu and 56.84% for Au, Moreover, a lead concentrate with a Pb content of 61.45% was also produced, indicating that the recovery of gold was enhanced.%采用铜铅混恒富集-抑铜浮铅浮恒分离的工艺,对某铜铅多金属硫化矿中的伴生金进行强化回收研究.在铜铅混恒阶段,弱碱性条件(pH=9)下,用Z-200(30 g/t)做捕收剂,金在铜铅混合精矿中有效富集;在铜铅分离阶段,以硫化钠(4000 g/t)预先脱药,用乙硫氮(30 g/t)浮恒铅矿物,金在铜精矿中进一步富集.工艺闭路实悚获得含铜18.69%、含金42.70 g/t的含金铜精矿,铜和金的回收率分别达到92.58%和56.84%;还同时获得含铅61.45%的铅精矿.可实现铜铅多金属硫化矿中伴生金的强化回收.
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