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Gold Science and Technology ›› 2015, Vol. 23 ›› Issue (4): 86-90.doi: 10.11872/j.issn.1005-2518.2015.04.086

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Influence of Chloride Ion on the Biooxidation of Gold-containing Pyrite

LIANG Changli1，2，3，QIN Wenqing3，CHEN Jinghe1，YANG Hangqu1，ZHONG Shuiping1   

  1. 1.State Key Laboratory of Comprehensive Utilization of Low-grade Refractory Gold Ores，Zijin Mining Group Co.，Ltd.，Shanghang   364200，Fujian，China；
    2.Jiangxi Key Laboratory of  Mining Engineering，Jiangxi University of  Science and Technology，Ganzhou   341000，Jiangxi，China；
    3.School of  Minerals Processing and Bioengineering，Central South University，Changsha    410083，Hunan，China
  • Received:2015-06-08 Revised:2015-07-19 Online:2015-08-28 Published:2015-11-16

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Abstract:

The influence of chloride ion on the biooxidation of gold-containing pyrite and the formation of products were studied in this work.Biooxidaiton results showed that the addition of 0.01 mol/L chloride ion has significantly promotion action on the oxidation dissolution of gold-containing pyrite，while it has inhibition action on the biooxidation of gold-containing pyrite for it can inhibit the growth of the microorganisms when the concentration of chloride ion is higher than 0.04 mol/L.XRD analysis showed the formation of elemental sulfur on the surface of the ore when the chloride ion is in the absence of the biooxidation，while the presence of chloride ion can effectively eliminate the accumulation of elemental sulfur on the ore surface.The promotion action of chloride ion should mainly for it can eliminate the accumulation of elemental sulfur，which hamper the biooxidation of gold-containing pyrite.

Key words: hloride ion, gold-containing pyrite, biooxidaiton, elemental sulfur

CLC Number: 

  • TF831

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