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Ultra fast microwave-assisted leaching for the recovery of copper and tellurium from copper anode slime

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Abstract

The decomposition of copper anode slime heated by microwave energy in a sulfuric acid medium was investigated. Leaching experiments were carried out in a multi-mode cavity with microwave assistance. The leaching process parameters were optimized using response surface methodology (RSM). Under the optimized conditions, the leaching efficiencies of copper and tellurium were 99.56% ± 0.16% and 98.68% ± 0.12%, respectively. Meanwhile, a conventional leaching experiment was performed in order to evaluate the influence of microwave radiation. The mechanism of microwave-assisted leaching of copper anode slime was also investigated. In the results, the microwave technology is demonstrated to have a great potential to improve the leaching efficiency and reduce the leaching time. The enhanced recoveries of copper and tellurium are believed to result from the presence of a temperature gradient due to the shallow microwave penetration depth and the superheating at the solid-liquid interface.

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Authors and Affiliations

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

    Zhi-yuan Ma, Hong-ying Yang, Yang Lü & Liu Xiong

  2. National Engineering Laboratory of Bio-hydrometallurgy, General Research Institute for Nonferrous Metals, Beijing, 100088, China

    Zhi-yuan Ma & Song-tao Huang

Authors
  1. Zhi-yuan Ma
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  2. Hong-ying Yang
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  3. Song-tao Huang
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  4. Yang Lü
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  5. Liu Xiong
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Correspondence to Hong-ying Yang.

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Ma, Zy., Yang, Hy., Huang, St. et al. Ultra fast microwave-assisted leaching for the recovery of copper and tellurium from copper anode slime. Int J Miner Metall Mater 22, 582–588 (2015). https://doi.org/10.1007/s12613-015-1110-2

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  • DOI: https://doi.org/10.1007/s12613-015-1110-2

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