Kinetics of leaching refractory gold ores by ultrasonic-assisted electro-chlorination

Ping Zhu, Xin-jiong Zhang, Kun-fang Li, Guang-ren Qian, Ming Zhou

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    Ping Zhu, Xin-jiong Zhang, Kun-fang Li, Guang-ren Qian, and Ming Zhou, Kinetics of leaching refractory gold ores by ultrasonic-assisted electro-chlorination, Int. J. Miner. Metall. Mater., 19(2012), No. 6, pp.473-477. https://dx.doi.org/10.1007/s12613-012-0582-6
    Ping Zhu, Xin-jiong Zhang, Kun-fang Li, Guang-ren Qian, and Ming Zhou, Kinetics of leaching refractory gold ores by ultrasonic-assisted electro-chlorination, Int. J. Miner. Metall. Mater., 19(2012), No. 6, pp.473-477. https://dx.doi.org/10.1007/s12613-012-0582-6
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    Kinetics of leaching refractory gold ores by ultrasonic-assisted electro-chlorination

    • College of Environmental and Chemical Engineering, Shanghai University, Shanghai 200444, China

    • Semiconductor Manufacturing International Corporations (Shanghai), Shanghai 201203, China

    基金项目: 

    This work was financially supported by the Key Subject of Shanghai Municipality (No.S30109) and Shanghai Science and Technology Commission (No.10dz1205302).

      通信作者:

      Ping Zhu E-mail: xhnzp@shu.edu.cn

    中文摘要

    The resources of refractory gold ores are abundant, and their effective treatment can bring good economic benefits. This paper investigated the kinetics of leaching gold from refractory gold ores by ultrasonic-assisted electro-chlorination. The effects of ultrasound time ratio, initial hydrochloric acid concentration and leaching temperature on the kinetic parameters were discussed. It is found that the leaching ratio goes up with all the factors increasing. The reaction kinetics is controlled by diffusion. When ultrasound improves the diffusion by reducing the diffusion resistance, the activation energy increases to 37.1 kJ/mol.

     

    Kinetics of leaching refractory gold ores by ultrasonic-assisted electro-chlorination

    Author Affilications

      • College of Environmental and Chemical Engineering, Shanghai University, Shanghai 200444, China

      • Semiconductor Manufacturing International Corporations (Shanghai), Shanghai 201203, China

    • Funds: 

      This work was financially supported by the Key Subject of Shanghai Municipality (No.S30109) and Shanghai Science and Technology Commission (No.10dz1205302).

    • Received: 14 August 2011; Revised: 07 September 2011; Accepted: 14 September 2011;
    The resources of refractory gold ores are abundant, and their effective treatment can bring good economic benefits. This paper investigated the kinetics of leaching gold from refractory gold ores by ultrasonic-assisted electro-chlorination. The effects of ultrasound time ratio, initial hydrochloric acid concentration and leaching temperature on the kinetic parameters were discussed. It is found that the leaching ratio goes up with all the factors increasing. The reaction kinetics is controlled by diffusion. When ultrasound improves the diffusion by reducing the diffusion resistance, the activation energy increases to 37.1 kJ/mol.

     

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