活性炭与银离子组合催化低品位原生硫化铜矿细菌浸出的效应

为了进一步提高永平铜矿低品位原生硫化铜矿细菌浸出的效果，通过试验，研究了活性炭与银离子组合催化低品位原生硫化铜矿细菌浸出的效应。研究表明，在细菌浸出的初始阶段，添加活性炭与银离子组合可以进一步提高铜的浸出速度及浸出率，其浸出效果比单独添加活性炭或银离子要好，其中3.0g/L活性炭与2.0 mg/L银离子组合最有利于铜的浸出，在浸出310 h时，铜的浸出率可达到80％，而单独添加3.0g/L活性炭或2.5 mg/L银离子，在浸出310 h时，铜的浸出率分别为62％和20％；控制600～650 mV的低氧化还原电位条件更有利于细菌浸出低品位原生硫化铜矿中的铜。

Catalytic Effect of the Combined Use of Activated Carbon and Silver Ion on the Bioleaching of Low Grade Primary Copper Sulfide Ore

The catalytic effect of combined use of activated carbon and silver ion on improving the efficiency of the bioleaching of Yongping Copper Mine's low-grade primary copper sulfide ores was investigated through shaking flask experiment. The results show that the addition of both activated carbon and silver ion can further accelerate the dissolution velocity and rate of copper at the initial stage of bioleaching, with a leaching result better than that achieved when only activated carbon or silver ion is added. A combination of 3.0 g/L activated carbon and 2.0mg/L silver ion is most favorable to the copper leaching. In this case, the leaching rate of copper can reach 80% after 310 h bioleaching while it is only 62% and 20% respectively when only 3.0 g/L activated carbon or 2.5 mg/L silver ion is added. It is found that it is more favorable to the bioleaching of copper from low-grade primary copper sulfide ores if the low redox potential is controlled at 600～650 mV.