中文摘要：

采用铜铅混选富集-抑铜浮铅浮选分离的工艺,对某铜铅多金属硫化矿中的伴生金进行强化回收研究。在铜铅混选阶段,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）浮选铅矿物,金在铜精矿中进一步富集。工艺闭路实验获得含铜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。

英文摘要：

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.