Accelerating column leaching trial on copper sulfide ore

The main measures to accelerate leaching sulfide ore are large spraying intensity, manual oxygen supply, temperature control, and acclimated bacteria. The indoor experiment accelerating sulfide ore leaching detected the temperature during leaching process, dissolvability of oxygen, bacterial concentration, Cu concentration and slag grade. At the same time, this paper also analyzed the effect of four factors, which are bacterial diversity cultivation stage, spraying intensity, air supply, and whether to control temperature, on the leaching efficiency of copper. The results indicate that the oxygen content of leach solution has a close relationship with temperature but it is rarely affected by air supply. The bacterial concentration preserves from 106 to 107 mL−1, and temperature has a great effect on the bacterial activity under the condition of proper temperature and oxygen supply, and the lack of nutrition prevents the bacterial concentration from rising in the late stage. The relationships of the copper leaching efficiency to temperature, air feed, and spraying intensity are directly proportional. The leaching efficiencies of the cultivated bacteria and acclimation bacteria are 1.2 and 1.4 times as large as that of the original bacteria.