彩票大全软件

The bioleaching of chalcopyrite is limited by its slow leaching rate. To improve dissolution kinetics, the effects of Fe2+ and Fe3+ on mechanical activation-pretreatment chalcopyrite leaching by Acidithiobacillus caldus (A. caldus) and Sulfobacillus thermosulfidooxidans (S. thermosulfidooxidans) were studied. Mechanical activation reduces particle size and causes lattice defects in chalcopyrite, leading to significantly increased chemical leaching. In bioleaching experiments, A. caldus enhanced the leaching efficiency of mechanically activated chalcopyrite in the Fe3+ system, reaching a leaching rate of 95.3%. Increasing the number of sulfur-oxidizing microorganisms and reducing the number of iron-oxidizing microorganisms in the leaching system can keep Redox Potential (ORP) within an appropriate range, thereby improving the bioleaching efficiency. Chalcopyrite chemical leaching and bioleaching with S. thermosulfidooxidans are controlled by surface chemical reactions and internal diffusion, respectively, while chalcopyrite bioleaching with A. caldus contains both mechanisms. The main residues during bioleaching are elemental sulfur and chalcopyrite; therefore, controlling the solution potential and ferrous/sulfur oxidation activity of microorganisms can enhance the bioleaching of chalcopyrite.

中文翻译：

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具有机械活化和氧化还原电位调节的增强黄铜矿生物浸出


黄铜矿的生物浸出受到其缓慢浸出速率的限制。为了改善溶出动力彩票大全软件，研究了 Fe2+ 和 Fe3+ 对 Acidithiobacillus caldus （A. caldus） 和 Sulfobacillus thermosulfidooxidans （S. thermosulfidooxidans） 的机械活化预处理黄铜矿浸出的影响。机械活化会减小颗粒尺寸并导致黄铜矿中出现晶格缺陷，从而导致化彩票大全软件浸出显著增加。在生物浸出实验中，A. caldus 提高了 Fe3+ 体系中机械活化黄铜矿的浸出效率，浸出率达到 95.3%。增加浸出系统中硫氧化微生物的数量并减少铁氧化微生物的数量可以将氧化还原电位 （ORP） 保持在适当的范围内，从而提高生物浸出效率。黄铜矿化彩票大全软件浸出和用 S. thermosulfidooxidans 的生物浸出分别受表面化彩票大全软件反应和内部扩散控制，而黄铜矿与 A. caldus 的生物浸出包含这两种机制。生物浸出过程中的主要残留物是元素硫和黄铜矿;因此，控制微生物的溶液电位和亚铁/硫氧化活性可以增强黄铜矿的生物浸出。