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Volume 24 Issue 12
Dec.  2017
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文章导航 >  矿物冶金与材料学报（英文）  > 2017  >  24(12): 1352-1360
Ping Xue, Guang-qiang Li, Yong-xiang Yang, Qin-wei Qin,  and Ming-xing Wei, Recovery of valuable metals from waste diamond cutters through ammonia-ammonium sulfate leaching, Int. J. Miner. Metall. Mater., 24(2017), No. 12, pp. 1352-1360. https://doi.org/10.1007/s12613-017-1527-x
Cite this article as:
Ping Xue, Guang-qiang Li, Yong-xiang Yang, Qin-wei Qin,  and Ming-xing Wei, Recovery of valuable metals from waste diamond cutters through ammonia-ammonium sulfate leaching, Int. J. Miner. Metall. Mater., 24(2017), No. 12, pp. 1352-1360. https://doi.org/10.1007/s12613-017-1527-x
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研究论文

Recovery of valuable metals from waste diamond cutters through ammonia-ammonium sulfate leaching

  • Key Laboratory for Ferrous Metallurgy and Resource Utilization of Ministry of Education, Wuhan University of Science and Technology, Wuhan 430081, China

  • School of Electromechanical and Architectural Engineering, Jianghan University, Wuhan 430056, China

  • Department of Materials Science and Engineering, Delft University of Technology, 2628 CD Delft, The Netherlands

  • 通讯作者:

    Guang-qiang Li    E-mail: liguangqiang@wust.edu.cn

  • Copper and zinc were recovered from waste diamond cutters through leaching with an ammonia-ammonium sulfate system and air as an oxidant. The effects of experimental parameters on the leaching process were investigated, and the potential-pH (E-pH) diagrams of Cu-NH3-SO42--H2O and Zn-NH3-SO42--H2O at 25℃ were drawn. Results showed that the optimal parameters for the leaching reaction are as follows:reaction temperature, 45℃; leaching duration, 3 h; liquid-to-solid ratio, 50:1 (mL/g); stirring speed, 200 r/min; ammonia concentration, 4.0 mol/L; ammonium sulfate concentration, 1.0 mol/L; and air flow rate, 0.2 L/min. The results of the kinetics study indicated that the leaching is controlled by the surface chemical reaction at temperatures below 35℃, and the leaching is controlled by diffusion through the product layer at temperatures above 35℃.
    • Research Article

    Recovery of valuable metals from waste diamond cutters through ammonia-ammonium sulfate leaching

    + Author Affiliations
      Abstract
    • Copper and zinc were recovered from waste diamond cutters through leaching with an ammonia-ammonium sulfate system and air as an oxidant. The effects of experimental parameters on the leaching process were investigated, and the potential-pH (E-pH) diagrams of Cu-NH3-SO42--H2O and Zn-NH3-SO42--H2O at 25℃ were drawn. Results showed that the optimal parameters for the leaching reaction are as follows:reaction temperature, 45℃; leaching duration, 3 h; liquid-to-solid ratio, 50:1 (mL/g); stirring speed, 200 r/min; ammonia concentration, 4.0 mol/L; ammonium sulfate concentration, 1.0 mol/L; and air flow rate, 0.2 L/min. The results of the kinetics study indicated that the leaching is controlled by the surface chemical reaction at temperatures below 35℃, and the leaching is controlled by diffusion through the product layer at temperatures above 35℃.
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