利用农业废弃物发酵产生的残渣提高低品位硫化铜矿生物浸出铜的回收率

陈威; 尹升华; 宋庆; 王雷鸣; 陈勋

doi:10.1007/s12613-021-2392-1

Volume 29 Issue 12

Dec. 2022

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文章导航 > 矿物冶金与材料学报（英文） > 2022 > 29(12): 2136-2143

Wei Chen, Shenghua Yin, Qing Song, Leiming Wang, and Xun Chen, Enhanced copper recovery from low grade copper sulfide ores through bioleaching using residues produced by fermentation of agricultural wastes, Int. J. Miner. Metall. Mater., 29(2022), No. 12, pp. 2136-2143. https://doi.org/10.1007/s12613-021-2392-1

Cite this article as:

Wei Chen, Shenghua Yin, Qing Song, Leiming Wang, and Xun Chen, Enhanced copper recovery from low grade copper sulfide ores through bioleaching using residues produced by fermentation of agricultural wastes, Int. J. Miner. Metall. Mater., 29(2022), No. 12, pp. 2136-2143. https://doi.org/10.1007/s12613-021-2392-1

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研究论文

利用农业废弃物发酵产生的残渣提高低品位硫化铜矿生物浸出铜的回收率

1)
北京科技大学金属矿山高效开采与安全教育部重点实验室, 北京100083
2)
北京科技大学土木与资源工程学院, 北京100083

通讯作者:
尹升华 E-mail: csuysh@126.com

文章亮点

(1) 系统地研究了添加农业废弃物发酵产生的残渣对硫化铜矿生物浸出的影响规律。

(2) 揭示了铜浸出率、细菌群落和农业废弃物发酵产生的残渣之间的关系。

(3) 总结并提出了添加农业废弃物发酵产生的残渣能够促进硫化铜矿生物浸出的潜在机理。

中文摘要

生物浸出回收低品位硫化铜矿中的铜金属具有操作简单、低能耗、节约经济等优点，低品位硫化铜矿生物浸出效率低是其面临的主要问题之一。本文为了促进生物浸出效率，研究了农业废弃物发酵产生的残渣对低品位硫化铜矿石生物浸出、铜浸出率和细菌群落的影响。研究结果表明，添加适量农业废弃物发酵产生的残渣有助于低品位硫化铜矿的生物浸出，这主要是通过减少Fe3+水解形成的钝化层来实现的。浸矿过程中添加5 g·L1农业废弃物发酵产生的残渣后，铜浸出率提高到了78.35%，细菌浓度提高到了每毫升9.56 107个。同时，通过16S rDNA分析可知，添加农业废弃物发酵产生的残渣可以影响微生物群落。添加农业废弃物发酵产生的残渣后，各个实验样本间差异变大，最大值达到0.375。在生物浸矿实验过程中，添加5 g·L1农业废弃物发酵产生的残渣的实验样本中Acidithiobacillus ferrooxidans所占比例最高，达到了28.63%。

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Research Article

Enhanced copper recovery from low grade copper sulfide ores through bioleaching using residues produced by fermentation of agricultural wastes

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Abstract

Abstract

Effects of residues produced by agricultural wastes fermentation (AWF) on low grade copper sulfide ores bioleaching, copper recovery, and microbial community were investigated. The results indicated that adding appropriate bulk of AWF made contributions to low grade copper sulfide ores bioleaching, which may be mainly realized through reducing the passivation layer formed by Fe³⁺ hydrolysis. Improved copper recovery (78.35%) and bacteria concentration (9.56 × 10⁷ cells·mL⁻¹) were yielded in the presence of 5 g·L⁻¹ AWF. The result of 16S rDNA analysis demonstrated that microbial community was differentiated by adding AWF. Bacteria proportion, such as Acidithiobacillus ferrooxidans, Moraxella osloensis, and Lactobacillus acetotolerans changed distinctly. Great difference between samples was showed according to beta diversity index, and the maximum value reached 0.375. Acidithiobacillus ferrooxidans accounted for the highest proportion throughout the bioleaching process, and that of sample in the presence of 5 g·L⁻¹ AWF reached 28.63%. The results should show reference to application of agricultural wastes and low grade copper sulfide ores.
- low grade copper sulfide ores;
- bioleaching;
- agricultural wastes;
- fermentation;
- microbial community

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