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Research Article

Extraction of copper from copper bearing biotite by ultrasonic-assisted leaching

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  • Received: 16 March 2020Revised: 1 July 2020Accepted: 2 July 2020Available online: 5 July 2020
  • Copper bearing biotite is a typical refractory copper mineral on the surface of Zambian copper belt. Aiming to treat this kind of copper oxide ore with a more effective method, ultrasonic-assisted acid leaching was conducted in this paper. Compared with regular acid leaching, ultrasound could reduce leaching time from 120 min to 40 min, and sulfuric acid concentration could be reduced from 0.5 mol•L-1 to 0.3 mol•L-1. Besides, leaching temperature could be reduced from 75℃ to 45℃ at same copper leaching rate of 78%. Mechanism analysis indicates that ultrasonic wave can cause delamination of copper bearing biotite and increase the specific surface area from 0.55 m2•g-1 to 1.67 m2•g-1. The results indicate that copper extraction from copper bearing biotite by ultrasonic-assisted acid leaching is more effective than regular acid leaching. This study proposes a promising method for recycling valuable metals from phyllosilicate minerals.
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    [2] Jin-lin Yang, Ji-guang Liu, Han-xin Xiao, and  Shao-jian Ma, Sulfuric acid leaching of high iron-bearing zinc calcine, Int. J. Miner. Metall. Mater., https://doi.org/10.1007/s12613-017-1513-3
    [3] Saeed Nobakht and  Mohsen Kazeminezhad, Electrical annealing of severely deformed copper:microstructure and hardness, Int. J. Miner. Metall. Mater., https://doi.org/10.1007/s12613-017-1506-2
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    [9] Xiao-fang Shi, Li-zhong Chang, and  Jian-jun Wang, Effect of ultrasonic power introduced by a mold copper plate on the solidification process, Int. J. Miner. Metall. Mater., https://doi.org/10.1007/s12613-017-1388-3
    [10] Xin-bo Liu, Feng-bin Qiao, Li-jie Guo, and  Xiong-er Qiu, Metallographic structure, mechanical properties, and process parameter optimization of 5A06 joints formed by ultrasonic-assisted refill friction stir spot welding, Int. J. Miner. Metall. Mater., https://doi.org/10.1007/s12613-017-1391-8
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Extraction of copper from copper bearing biotite by ultrasonic-assisted leaching

  • Corresponding authors:

    Jue Kou    E-mail: koujue@ustb.edu.cn

    Yi Xing    E-mail: xingyi@ustb.edu.cn

  • 1. School of Civil and Resource Engineering, University of Science and Technology Beijing, Beijing 100083, China
  • 2. School of Energy and Environmental Engineering, University of Science and Technology Beijing, Beijing 100083, China

Abstract: Copper bearing biotite is a typical refractory copper mineral on the surface of Zambian copper belt. Aiming to treat this kind of copper oxide ore with a more effective method, ultrasonic-assisted acid leaching was conducted in this paper. Compared with regular acid leaching, ultrasound could reduce leaching time from 120 min to 40 min, and sulfuric acid concentration could be reduced from 0.5 mol•L-1 to 0.3 mol•L-1. Besides, leaching temperature could be reduced from 75℃ to 45℃ at same copper leaching rate of 78%. Mechanism analysis indicates that ultrasonic wave can cause delamination of copper bearing biotite and increase the specific surface area from 0.55 m2•g-1 to 1.67 m2•g-1. The results indicate that copper extraction from copper bearing biotite by ultrasonic-assisted acid leaching is more effective than regular acid leaching. This study proposes a promising method for recycling valuable metals from phyllosilicate minerals.

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