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Gold Science and Technology ›› 2013, Vol. 21 ›› Issue (5): 123-126.

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Experimental Study on Pre-oxidization and Cyanide Carburizing of Refractory Gold Concentrate Containing High Sulphur Content

FAN Daoyan,DONG Bowen   

  1. Xiamen Zijin Mining and Metallurgy Technology Co.，Ltd.，Xiamen   361101，Fujian，China
  • Received:2013-06-20 Revised:2013-09-03 Online:2013-10-28 Published:2014-04-02

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Abstract:

Biological oxidation-leaching experiments of refractory gold concentrate containing high sulfur was carried out.The relationships of leaching rate of gold with the process parameter of pulp density，pH value，the reaction temperature，grinding fineness，oxidation time were studied by experiment，and the oxidated  liquid was under the reuse treatment.Under the optimal process conditions，including slurry concentration of 16%，the pH value 1.2~1.4，the reaction temperature was 40 ℃，grinding fineness of less than 0.043 mm accounted for more than 94.8%，the oxidation time condition for 8 days.The ore sample was dealed with the bacterial oxidation processing technology，the oxidation rate of sulfur reached 86.0%，the leaching rate of gold was improved from 23.4% to 92.6%.

Key words: bacterial pre-oxidation, gold concentrate containing high sulphur, liquid recycle after oxidation, cyanide leaching

CLC Number: 

  • TF831

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