墨西哥某铜矿浮选-浸出-萃取-电积回收铜工艺研究

墨西哥某矿为氧化铜矿物为主的混合矿，脉石主要为石英，矿石中还含有比较好浮的硫化铜矿物（黄铜矿），其酸浸效率不如氧化铜矿物，而且酸浸可能产生有害气体硫化氢。重点研究了浮选-浸出工艺，结果表明，采用硫化钠活化和丁黄药浮选，能获得铜品位为19.10%、铜回收率为35.02%的铜精矿；浮选尾矿直接用于后续浸出试验，H₂SO₄浓度为1 mol/L，液固比为3，室温（15 ℃）下搅拌浸出1 h，铜浸出率83.33%。以原矿为计算基准，铜浸出率为54.16%，若浮选精矿加浸出铜的总回收率则达到89.18%。

Research on Copper Recovery from A Mexico Cooper Ore by Flotation-Leaching- Extraction-Electrowinning Process

A Mexico copper ore is a mixed one that contains mainly oxidized copper minerals, quartz which is the main gangue and copper sulfide mineral (chalcopyrite)which is easy to float but inferior to oxide copper minerals in acid leaching efficiency and may produce harmful gas-sulfureted hydrogen. The key in this research is flotation-leaching process. The results show that a cooper concentrate grading 19.10% at a copper recovery of 35.02% can be obtained when sodium sulfide is used for activation and butyl xanthate for flotation. The flotation tailings are directly used in the downstream flotation test under the conditions of H₂SO₄ concentration of 1mol/L, liquid-solid ratio of 3, and one hour agitation at ambient temperature of 15 ℃. The copper leaching rate is 83.33% and 54.16% if calculated according to the run-of-mine ore. The total recovery of the copper by both flotation and leaching has reached 89.18%.