Abstract

Bioleaching of sulfide concentrates with different copper and zinc contents using two cultures of acidophilic chemolithotrophic microorganisms, which were grown at 30 and 35°C, was studied. The average leaching rate of copper was shown to be directly dependent on the copper content in the concentrate. The leaching rate of zinc was found to depend not only on the zinc content but also on the copper content. At the same time, the specific leaching rate of copper varied insignificantly (28–45 mg/(g day)), while the change in the specific leaching rate of zinc was much more pronounced (107–319 mg/(g day)) and depended on the metal contents in the concentrates. Under all conditions of bioleaching, the specific rate of zinc extraction into the aqueous phase increased significantly with an increase in the copper content in the concentrates, which indicated galvanic interactions between sulfide minerals. The possibility of the obtainment of the copper concentrates containing negligible amounts of zinc after bioleaching of the concentrates, in which the content of copper exceeded that of zinc and was not less than 10%, was shown. Bioleaching of the concentrates containing more zinc than copper is impractical.

中文翻译：

---

不同铜锌含量硫化物精矿的生物浸出及生物浸出残渣等级的评估

摘要

研究了在30和35°C下生长的两种嗜酸性化营养微生物的培养物对不同铜和锌含量的硫化物精矿的生物浸出。结果表明，铜的平均浸出率直接取决于精矿中铜的含量。发现锌的浸出速率不仅取决于锌含量，而且取决于铜含量。同时，铜的比浸出率变化很小（28-45 mg /（g天）），而锌的比浸出率变化更明显（107-319 mg /（g天））并取决于精矿中的金属含量。在所有生物浸提条件下，随着精矿中铜含量的增加，浸入水相中的锌的比率显着增加，表明硫化物矿物之间存在电相互作用。在铜的含量超过锌且不小于10％的生物浸出精矿后，显示了获得含锌量可忽略不计的铜精矿的可能性。锌比铜多的精矿的生物浸出是不切实际的。