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Modeling heap biooxidation of arsenic-bearing gold ore

含砷金矿生物堆浸氧化的模拟研究

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Abstract

To design heap biooxidation process, it is necessary to understand its internal rules. The heap biooxidation of gold ore from Anhui province was researched in this study. The results showed that the main microorganisms in the heap were A. ferrooxidans, F. acidiphilum and L. ferrodiazotrophum. Under their combined action, gold leaching extent rose from 35.62% to 78.08% in 80 d. Boltzmann model matches the actual oxidation effect better and the model equations were obtained. The model predicted that the oxidation extents of arsenic and sulfur are 58.577% and 42.122% after one year, and the gold leaching extent was 80.40%. The arsenic and sulfur oxidation extents, and gold leaching extent were all linearly correlated. It is more reliable to predict gold leaching extent by sulfur oxidation extent. These results provided good guidance for practical application in the actual production.

摘要

为了优化生物堆浸氧化设计, 必须深入了解内在规律. 本研究对安徽省某含砷金矿生物堆浸氧化过程进行分析讨论, 结果表明: 堆中主要微生物为 A. ferrooxidans, F. acidiphilum 和 L. ferrodiazotrophum 等. 在它们的协同作用下, 80 天后堆中矿石金浸出率由 35.62%升高至78.08%. Boltzmann 模型对实际氧化结果的拟合更佳, 并得出了相应的模型方程. 用模型预测 1 年后砷、 硫氧化率分别为 58.577%和 42.122%, 金浸出率为 80.40%. 分析结果表明砷氧化率、 硫氧化率和金浸出率均为线性相关关系, 用硫氧化率预测金浸出率更精确. 这些结果为生物堆浸氧化的实际应用提供了很好的指导.

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Authors and Affiliations

  1. School of Metallurgy, Northeastern University, Shenyang, 110819, China

    Jia-feng Li  (李佳峰), Lin-lin Tong  (佟琳琳) & Hong-ying Yang  (杨洪英)

  2. State Key Laboratory of Gold Extraction, Zijin Mining Group Co., Ltd., Shanghang, 364200, China

    Shui-ping Zhong  (衷水平)

  3. Xincheng Mining Co., Ltd., Guanhua Rare-precious Metals Group, Chizhou, 247100, China

    Deng-chao Zhang  (张登超) & Dong-bin Bao  (鲍东斌)

Authors
  1. Jia-feng Li  (李佳峰)
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  2. Shui-ping Zhong  (衷水平)
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  3. Lin-lin Tong  (佟琳琳)
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  4. Deng-chao Zhang  (张登超)
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  5. Dong-bin Bao  (鲍东斌)
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  6. Hong-ying Yang  (杨洪英)
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Corresponding author

Correspondence to Hong-ying Yang  (杨洪英).

Additional information

Foundation item: Project(U1608254) supported by the Special Fund for the National Natural Science Foundation of China; Projects(ZJKY2017(B)KFJJ01, ZJKY2017(B)KFJJ02) supported by the Zijin Mining Group Co., Ltd, China

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Li, Jf., Zhong, Sp., Tong, Ll. et al. Modeling heap biooxidation of arsenic-bearing gold ore. J. Cent. South Univ. 27, 1424–1431 (2020). https://doi.org/10.1007/s11771-020-4378-y

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  • DOI: https://doi.org/10.1007/s11771-020-4378-y

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