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Gold Science and Technology ›› 2018, Vol. 26 ›› Issue (2): 241-247.doi: 10.11872/j.issn.1005-2518.2018.02.241

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Experimental Study on Bacterial Oxidation-Cyanidation of a Complex Re-fractory Gold Mine in Gansu Province

SONG Yan 1，YANG Hongying 1，TONG Linlin 1，MA Pengcheng 2，JIN Zhenan 1   

  1. 1.School of Metallurgy，Northeastern University，Shenyang 110819，Liaoning，China;2.Zhaojin Mining Industry Co.，Ltd.，Zhaoyuan 265400，Shandong，China
  • Received:2017-07-11 Revised:2017-08-15 Online:2018-04-30 Published:2018-05-19

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Abstract: Taking the complex refractory gold mine containing sulfur，arsenic，carbon and antimony in Gansu Province as the research object，we carried out bacterial oxidation-cyanidation experiment.Bacteria used in the leaching was HQ0211 which was a kind of mixed bacteria being able to grow normally in the system containing arsenic after a long time of domestication.During leaching of the concentrate，the effects of different pulp densities on bacterial oxidation were evaluated by measuring the pH value of solution，the electric potential value of solution，the density of Fe2+，the density of arsenic in solution.The results indicated that the mixed bacteria cultures HQ0211 showed good biooxidation performance for the complex refractory gold concentrate. After biooxidation，the maximum sulfur removal efficiency of 81.53%，arsenic removal efficiency of 86.88%，carbon removal efficiency of 58.32% and antimony removal efficiency of 40.56% were achieved in the presence of the HQ0211 mixed culture.Highest gold recovery of 98.65% was achieved by cyanidation after biooxidation，which increased by 40.56% comparing to the result from cyanidation of the untreated concentrate.

Key words: complex refractory gold concentrate, bacterial oxidation, cyanidation, bioleaching bacteria HQ0211, sulfur removal efficiency, arsenic removal efficiency, carbon removal efficiency, antimony removal efficiency
参考文献(References)：

CLC Number: 

  • TF831


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