One of the problems associated with polymetallic ore concentration is the separation of bulk concentrates, which is difficult due to the textural and structural characteristics of mineral particles. In this paper, we proposed selective bioleaching of zinc and nickel from bulk copper-zinc and copper-nickel sulfide concentrates, respectively, to extract these metals into solution and to produce high-grade copper concentrates. In the copper-zinc concentrate, zinc occurred in sphalerite (ZnS). In the copper-nickel concentrate, nickel occurred in pentlandite ((Ni,Fe)₉S₈) and violarite (FeNi₂S₄). In both concentrates, which also contained pyrite (FeS₂) and pyrrhotite (Fe_1-xS), copper occurred in chalcopyrite (CuFeS₂). Bioleaching of the concentrates by acidophilic microbial communities at 30 and 40 °C was compared. Bioleaching at increased temperature was characterized by the higher intensity of the process. Complete removal of zinc from the copper-zinc concentrate occurred within 15 days at 30 °C and 4 days at 40 °C, while the copper content in the bioleach residue increased by 7.5 and 5.9%, respectively. Nickel leaching was less efficient: 67.6% at 30 °C and 86.7% at 40 °C after 22 days of the process. At the same time, the copper content in the bioleach residue increased by 2.7 and 5.7%. Dissolution of violarite proceeded more rapidly than that of pentlandite. More efficient zinc and nickel leaching from the concentrates at 40 °C could be associated with a higher microbial diversity in the communities formed at this temperature. An increase in the proportion of bacteria of the genera Sulfobacillus and Ferrimicrobium, as well as archaea of the families Ferroplasmaceae and Cuniculiplasmataceae, was shown. At both temperatures, Acidithiobacillus and Leptospirillum bacteria prevailed during the biooxidation of both, the copper-zinc and copper-nickel concentrates.

与多金属矿石浓缩相关的问题之一是散装精矿的分离，由于矿物颗粒的质地和结构特征，这很困难。在本文中，我们建议分别从散装铜锌和铜镍硫化物精矿中选择性生物浸出锌和镍，将这些金属提取到溶液中并生产高品位铜精矿。在铜锌精矿中，锌存在于闪锌矿 (ZnS) 中。在铜镍精矿中，镍出现在镍黄铁矿（(Ni,Fe) ₉ S ₈）和紫铁矿（FeNi ₂ S ₄）中。在这两种精矿中，还含有黄铁矿 (FeS ₂ ) 和磁黄铁矿 (Fe _1-xS)、铜发生在黄铜矿(CuFeS ₂）。比较了 30 和 40 °C 下嗜酸微生物群落对浓缩物的生物浸出。在升高的温度下生物浸出的特征在于该过程的强度更高。在 30 °C 下 15 天和 40 °C 下 4 天，铜锌精矿中的锌完全去除，而生物浸出残留物中的铜含量分别增加了 7.5% 和 5.9%。镍浸出效率较低：22 天后，在 30°C 时为 67.6%，在 40°C 时为 86.7%。同时，生物浸出渣中的铜含量分别增加了 2.7% 和 5.7%。紫堇石的溶解比镍黄铁矿的溶解进行得更快。在 40 °C 下从精矿中更有效地浸出锌和镍可能与在该温度下形成的群落中更高的微生物多样性有关。硫化杆菌属和Ferrimicrobium，以及家庭的古Ferroplasmaceae和Cuniculiplasmataceae，被证明。在两种温度下，酸硫杆菌和钩端螺旋体细菌在铜锌和铜镍浓缩物的生物氧化过程中占优势。