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Bioleaching and dissolution kinetics of pyrite, chalcocite and covellite

黄铁矿、辉铜矿和铜蓝的生物浸出及其浸出动力学

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Abstract

In this work, the bioleaching process of pyrite, chalcocite and covellite which were the main phase compositions for Zijin copper mineral was comprehensively studied. The influence parameters, such as leaching temperature, Fe3+ concentration, pH of solution and bacteria concentration were investigated. The leaching kinetics of the pyrite, chalcocite and covellite under the studied conditions was successfully modeled by an empirical diffusion-like equation, respectively. The apparent activity energy of pyrite leaching, chalcocite leaching (stage II) and covellite leaching was calculated to be 69.29, 65.02 and 84.97 kJ/mol, respectively.

摘要

研究紫金山铜矿主要矿物黄铁矿、辉铜矿和铜蓝,考察温度、细菌接种浓度、pH 值和 Fe3+浓 度等对矿物溶解动力学的影响,查明影响矿物溶解动力学的主要因素,获得控制氧化速率的关键步骤, 建立半经验动力学模型,经计算,黄铁矿、辉铜矿和铜蓝在浸出过程中的表观活化能分别为 69.29, 65.02 and 84.97 kJ/mol。

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Funding

Project(51574036) supported by the National Natural Science Foundation of China

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Authors and Affiliations

  1. National Engineering Laboratory of Biohydrometallurgy, GRINM Group Co., Ltd., Beijing, 100088, China

    He Shang  (尚鹤), Wen-cheng Gao  (高文成), Biao Wu  (武彪) & Jian-kang Wen  (温建康)

  2. GRINM Resources and Environment Tech. Co., Ltd., Beijing, 101407, China

    He Shang  (尚鹤), Wen-cheng Gao  (高文成), Biao Wu  (武彪) & Jian-kang Wen  (温建康)

  3. GRIMAT Engineering Institute Co., Ltd., Beijing, 101407, China

    He Shang  (尚鹤), Wen-cheng Gao  (高文成), Biao Wu  (武彪) & Jian-kang Wen  (温建康)

  4. General Research Institute for Nonferrous Metals, Beijing, 100088, China

    He Shang  (尚鹤), Wen-cheng Gao  (高文成), Biao Wu  (武彪) & Jian-kang Wen  (温建康)

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  1. He Shang  (尚鹤)
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  2. Wen-cheng Gao  (高文成)
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  3. Biao Wu  (武彪)
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  4. Jian-kang Wen  (温建康)
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Contributions

The overarching research goals were developed by SHANG He, GAO Wen-cheng, WU Biao and WEN Jian-kang. SHANG He and WU Biao provided the concept and edited the draft of manuscript. SHANG He conducted the literature review and GAO Wen-cheng wrote the first draft of the manuscript. SHANG He and GAO Wen-cheng analyzed the measured data. SHANG He, GAO Wen-cheng, WU Biao and WEN Jian-kang edited the draft of manuscript. All the authors replied to reviewers’ comments and revised the final version.

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Correspondence to Wen-cheng Gao  (高文成).

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Conflict of interest

SHANG He, GAO Wen-cheng, WU Biao and WEN Jian-kang declare that they have no conflict of interest.

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Shang, H., Gao, Wc., Wu, B. et al. Bioleaching and dissolution kinetics of pyrite, chalcocite and covellite. J. Cent. South Univ. 28, 2037–2051 (2021). https://doi.org/10.1007/s11771-021-4751-5

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