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研究硫铜钴矿生物浸出过程中细菌的作用及其溶解反应途径。结果表明,间接作用机制和接触作用机制均对硫铜钴矿生物浸出过程产生影响。当细菌吸附到矿物表面时,矿物溶解速率显著加快,说明浸出过程中接触作用机制对硫铜钴矿的溶解有重要影响。浸出过程中硫元素氧化价态的变化顺序为S-2→S0→S+4→S+6,并有单质硫沉淀在矿物表面,说明硫铜钴矿生物浸出过程按照多硫化物途径进行。硫铜钴矿表面被细菌严重腐蚀,出现许多大小不一的腐蚀坑洞,并有单质硫、硫酸盐及亚硫酸盐生成。这些氧化产物在矿物表面形成一层钝化层。
To study the role of bacteria in the bio-leaching of copper-copper-cobalt ore and its dissolution reaction pathway. The results showed that both the indirect mechanism of action and the mechanism of exposure affected the leaching process of copper, cobalt and cobalt ore. When the bacteria adsorbed to the mineral surface, the mineral dissolution rate was significantly accelerated, indicating that the contact mechanism during the leaching process has a significant impact on the dissolution of copper copper cobalt ore. In the process of leaching, the order of oxidation of sulfur is S-2 → S0 → S + 4 → S + 6, and elemental sulfur is precipitated on the surface of the mineral, indicating that the bioleaching process of copper-cobalt-cobalt ore is carried out according to the polysulfide route. The surface of the copper-cobalt-cobalt mine is seriously corroded by bacteria and many corrosion pits of various sizes appear and are formed with elemental sulfur, sulphate and sulphite. These oxidation products form a passivating layer on the mineral surface.