国内某低品位难选铜矿的生物浸出研究

目的:微生物湿法冶金技术是一种有效回收难处理常规选矿方法难以处理的复杂矿中金属的方法,本研究旨在利用该工艺处理国内某低品位(0.67%)难选铜矿,提高铜的回收率。方法:首先,从某矿山富集得到中温富集物,其次,对该矿石进行生物浸出,同时优化浸出过程工艺参数。结果:所富集得到的中温富集物最适生长温度为30℃,最适pH值为1.9。在摇瓶中浸出难选铜矿时,最佳摇床转速为180 r/min,最优充气强度为360 mL/min,10天内难选铜矿中铜的浸出率可以达到92%。结论:该中温富集物具有较好地浸出难选铜矿的能力。

Bioleaching of Some Low Grade Refractory Copper Ore*

Objective： Biohydrometallurgy is an effective way to deal with refractory metal ore which is difficult to be treated by convention flotation method. The copper grade of are refractory copper ore is 0.67%, due to this copper ore is very complex, the conventional method of floating for the copper recycling efficiency is extremely low. Methods： In this paper, bioleaching method is used to deal with this difficult copper ore. The microorganism collected from a domestic copper mine was used. It is a kind of medium temperature richment. Results： The optimum growth temperature is 30 degrees, the optimum pH value of 1.9. Bioleaching in the shake flask is difficult to choose copper mine, the best table speed is 180 r/min, the optimal aeration intensity of 360 mL/min, the upcoming selected 10 days of copper in the copper leaching rate can reach 92%. Conclusions： It is shown that the medium temperature richment has better ability of leaching is difficult to choose copper.