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Gold Science and Technology ›› 2013, Vol. 21 ›› Issue (5): 113-116.

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Pilot Plant Test of Oxidation Acid Leaching of Refractory Gold Concentrate Containing Arsenic

  

  1. 1.Institute of Process Engineering，Chinese Academy of Sciences，Beijing   100190，China；
    2.Jinchiling Gold Mine，Zhaojin Mining Co.，Ltd.，Zhaoyuan   265400，Shandong，China；
    3.Gansu Branch，Zhaojin Mining Co.，Ltd.，Dingxi   730500，Gansu，China
  • Received:2013-07-05 Revised:2013-08-31 Online:2013-10-28 Published:2014-04-02

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Abstract:

A pilot plant test and production factory of the new process for oxidation acid leaching （COAL）which is built in Zhaoyuan，Shandong Province，is summarized.Under the condition of 0.4 MPa oxygen pressure and 100 ℃，refractory gold concentrate containing arsenic would be leaching by this process.Lower operating pressure and temperature results in equipment simplification and operation easily.The costs of infrastructure investment and maintenance are significantly reduced than those of traditional pressure oxidation process.100 m3 pressure leaching autoclave is designed on the base of results obtained in small experiments.Their results confirm that recovery rate of Au and Ag reach 93%～95% and 92%～96%，respectively，which is agree with the small experiment results.This process could also apply to gold concentrates containing high level of arsenic and carbon after adjustments of operating parameters.

Key words: gold concentrate containing arsenic, hydrometallurgy, acid leaching

CLC Number: 

  • TF831

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