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Gold Science and Technology ›› 2014, Vol. 22 ›› Issue (6): 82-86.doi: 10.11872/j.issn.1005-2518.2014.06.082

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Experimental Study on Improving Gold Recovery by Pure Oxygen Application Technology for Cyanide Leaching Process

ZHANG Deliang1，LIU Yongguo1，TANG Le1，WEI Zhongling2，ZOU Zhong2，YIN Qing1   

  1. 1.Shandong Gold Mining （Xinhui）Co.，Ltd.，Pingdu    266715，Shandong，China；
    2.Linde China Technolgy Center， The Linde Group，Shanghai   201206，China
  • Received:2014-07-10 Revised:2014-08-26 Online:2014-12-28 Published:2015-01-14

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Abstract:

The gold ore of Shandong Gold Mining（Xinhui） was refractory ore，which was containing polymetallic  sulfides  ore and a certain amount of carbon.The dressing and smelting process is floatation，gold concentrate cyanidation，zinc dust replacement and gold mud hydrometallurgical process，but gold leaching is difficult dued to the high content of impurities concentrate and carbon robbing effect.In order to improve gold recovery，GOLDOXTM hydrometallurgy process was studied by bench scale test and 6 month plant scale test was conducted since July，2013.It was shown the process promoted leaching kinetics and improved gold recovery.The residue gold grade reduced 0.20 g/t in average after pure oxygen was applied. It means operating profit increase 808 000 Yuan per year in the plant.This would not only provide a successful example of oxygen leaching process，but also promote the high effective oxygen application in the Chinese gold industry.

Key words: pure oxygen, leaching kinetics, gold recovery, gold concentrate containing carbon, polymetallic sulfide ore

CLC Number: 

  • TF831

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