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Gold Science and Technology ›› 2015, Vol. 23 ›› Issue (5): 94-98.doi: 10.11872/j.issn.1005-2518.2015.05.094

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Experimental Research on Micro-disseminated Gold Ore Pretreated by Alkaline and Non-cyanide Leaching

TANG Lijing1，TANG Yun1，2，WANG Yannan1，YANG Dianqi1   

  1. 1.Mining College，Guizhou University，Guiyang    550025，Guizhou，China；
    2.Guizhou Key Laboratory of  Comprehensive Utilization of  Non-metallic Mineral Resources，Guizhou University ，Guiyang    550025，Guizhou，China
  • Received:2015-07-01 Revised:2015-08-12 Online:2015-10-28 Published:2015-12-09

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Abstract:

 The thesis focuses on research of the micro-disseminated gold ore.Explored the extraction effects，under the condition of wet milling，with non-cyanide leaching agent，pre-treating with lime and sodium carbonate，mixed system is more efficiency than single pretreatment system，which may influenced by the generation of sodium hydroxide.The reaction of sodium hydroxide with quartz and pyrite make the package gold exposed，which is beneficial to the leaching of gold.When inflating in the pretreatment and leaching process，leaching effect is better.This may be oxygen participate in the reaction or reduce the thickness of the diffusion layer and solid film thickness.The results showed that under the conditions of lime dosage was 50 kg/t，sodium carbonate dosage was 2 kg/t，pretreatment time was 4 h，a non-cyanide leaching agent was 10 kg/t，leaching time was 14 h，liquid-to-solid ratio was 3∶1，inflatable amounts was about 0.5 m3/h，the gold leaching rate of 86.09% was achieved.

Key words: micro-disseminated gold mine, lime, sodium carbonate, alkaline pretreatment, non-cyanide leaching

CLC Number: 

  • TF831

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