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Gold Science and Technology ›› 2017, Vol. 25 ›› Issue (6): 114-120.doi: 10.11872/j.issn.1005-2518.2017.06.114

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Performance of an Environmental Gold Leaching Agent and Activated Carbon Adsorption Characteristics of Gold in the Liquid

DANG Xiao’e1，WANG Lu1，MENG Yusong1，SONG Yonghui1，Lü Chaofei2   

  1. 1.Key Laboratory for Gold and Resources of Shaanxi，Xi’an University of Architecture and Technology，Xi’an   710055，Shaanxi，China；
    2.Tongguan Gold Corporation Co.，Ltd.，Weinan    730050，Shaanxi，China
  • Received:2017-08-12 Revised:2017-09-14 Online:2017-12-30 Published:2018-05-18

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Abstract:

In order to make an environmental agents completely replacing highly toxic sodium cyanide for gold smelting and solve the problem of the environmental pollution of cyanide waste water and waste residue during the process of extracting gold with cyanide，the adaptability of an environmental agent to different gold types and the adsorption selectivity of activated carbon to gold in the liquid of the environmental agent have been studied.The results show that the effect of the environmental agent on leaching gold from acid leaching residue and high sulphur gold ore is equivalent to that of cyanide，and the leaching rate of vulcanization gold ore is faster than the cyanide，and the amount of environmental agent and mineral type are related to the leaching process.The adsorption of gold and silver in the leaching precious liquid of environmental agent by activated carbon is selective，the pH value of the liquid should be kept at 10.0 to 10.5 to get better adsorption results.Due to the analysis method is not perfect，it is impossible to reveal the relationship between the consumption of agent during leaching process and the mineral types，and the change of concentration and composition before and after the adsorption of activated carbon can not be detected.Based on the study of pharmaceutical analysis method，the main task of current research is to reveal the gold dissolution mechanism of environmental agents and the interaction between the environmental protection agents and minerals.

Key words:  cyanide pollution, environmental agent, adaptability, activated carbon, adsorption selectivity, analysis method, gold dissolution mechanism

CLC Number: 

  • TF831

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