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通过摇瓶实验,研究了活性炭、Ag+及Fe2+组合对低品位原生硫化铜矿细菌浸出的催化效应。研究表明:在细菌浸出的初始阶段,添加活性炭、Ag+及Fe2+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Ag+要好,其中浸出效果最好的是3.0 g/L活性炭+2.0mg/L Ag++8.0 g/L Fe2+组合,在浸出168 h后,铜的浸出率可达到83%,其次是3.0 g/L活性炭+2.0 mg/L Ag+组合,浸出310 h后,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 Ag+,在浸出310 h时,铜的浸出率分别为62%和20%。控制550~640 mV的低氧化还原电位条件有利于细菌浸出低品位原生硫化铜矿中的铜。
The shake flask experiment was carried out to study the catalytic effect of activated carbon, Ag + and Fe2 + combinations on bacterial leaching of low-grade primary copper sulphate. The results showed that the addition of activated carbon, Ag + and Fe2 + could further improve the leaching rate and leaching rate of copper in the initial stage of bacterial leaching. The leaching effect was better than that of activated carbon or Ag + alone. The best leaching effect was 3.0 g / L After leaching for 168 h, the leaching rate of copper can reach 83%, followed by 3.0 g / L activated carbon + 2.0 mg / L Ag +, and after 310 h of leaching, activated carbon + 2.0 mg / L Ag + + 8.0 g / , Copper leaching rate can reach 80%. Adding 3.0 g / L activated carbon or 2.5 mg / L Ag + alone, the copper leaching rates were 62% and 20% respectively after 310 h of leaching. Controlling low oxidation-reduction potentials of 550-640 mV favors bacterial leaching of copper from low-grade primary sulphide ores.