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Gold Science and Technology ›› 2016, Vol. 24 ›› Issue (4): 154-159.doi: 10.11872/j.issn.1005-2518.2016.04.154

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Research on the Process of Pretreatment of Refractory Gold Ores Containing Antimony by Ozonation Leaching

WANG Hao,TIAN Qinghua,XIN Yuntao,GUO Xueyi   

  1. School of Metallurgy and Environment,Central South University,Changsha    410083,Hunan,China
  • Received:2016-06-26 Revised:2016-07-18 Online:2016-08-28 Published:2016-11-17

Abstract:

The experiment of pretreating the refractory gold ores containing antimony by ozonation leaching was carried out.The results show that,98.13% Sb and 43.52% S could be leaching under the following optimum conditions,that is,leaching at 75 ℃ for 4 h with HCl concentration of 4.5 mol/L,liquid-solid rate at 10∶1,ozone concentration at 121.9 g/L.The gold could be enriched in the slag after dealing with the oxidation leaching.Thiourea was used in leaching gold from the ores and the leaching slag,70.17% Au could be extracting from the leaching slag,while only 12.36% from the ores.Therefore,comprehensive recovery of Sb and Au could be achieving by ozonation pretreatment.The results can provide theoretical and technological supports for leaching stibnite and pretreating refractory gold ores by ozone oxidation.

Key words: refractory gold ores, antimony, ozonation leaching, pretreatment

CLC Number: 

  • TF831 

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