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Gold Science and Technology ›› 2013, Vol. 21 ›› Issue (5): 117-123.

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Research on Bacterial Preoxidation-CIL Cyaniding for Refractory Gold  Concentrates Ores

HUANG Zhongsheng，WU Zengling，ZHONG Shuiping，WANG Ruiyong，LIANG Changli   

  1. State Key Laboratory of Comprehensive Utilization of Low-Grade Refractory Gold Ores，Zijin Mining Group Co.，Ltd.，Shanghang   364200，Fujian，China
  • Received:2013-08-01 Revised:2013-09-05 Online:2013-10-28 Published:2014-04-02

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Abstract:

In this paper，the extraction of gold from refractory gold concentrates ores by single factor and continuous biooxidation-cyanidation CIL process，and the influences of particle size of the gold ore，pulp concentration，biooxidation time，pH value and aeration rate were investigated.The results of biooxidation and cyanidation CIL showed that pulp concentration，biooxidation time and aeration rate were the main influence factors.The oxidation and the extraction efficiency of the gold ore by single bioreactor and continuous biooxidation -cyanidation CIL process both higher than 95%，when the gold ore biooxidation under the conditions：-0.034 mm was about 75%，pulp concentration was 14%，biooxidation temperature was 45 ℃，aeration rate was in the range of 0.25~35 m3/h·L-1，biooxidation gold ore time was 7 to 8 days.

Key words: refractory gold concentrates ores, biooxidation, CIL cyaniding process

CLC Number: 

  • TF831

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