关键词: 铜铅锌多金属硫化矿, 铜铅混合浮选, 铜铅分离浮选, 锌浮选, 回水利用

Abstract: A copper-lead-zinc multi-metal sulfide mine in Tibet lives in a complex environment and is lack of water, which restricts the exploitation of mine. Based on the detailed conditioning tests, the closed-circuit flotation tests are made with fresh water and recycling water by the flow-sheet of copper-lead bulk flotation, copper and lead separation of flotation concentrate, and zinc flotation from tailings, The results showed that with the recycled water, copper concentrate with a Cu grade of 26.44% and a recovery of 89.67%, lead concentrate with a lead grade of 62.13% and a recovery of 84.15% and zinc concentrate with a zinc grade of 47.03% and a recovery of 73.16% were obtained respectively. With the fresh water, all technical indexes had no much difference, but the recovery of wastewater reached 85%. This research provides a technical basis for solving the crisis of water resources.

Key words: Copper-lead-zinc multi-metal sulfide ore, Copper-lead bulk flotation, Copper-lead separation flotation, Zinc flotation, Recycled water utilization