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| Effect of Ethylenediamine Tetraacetic Acid Disodium on Cementation of Gold with Copper Powder from Thiosulphate Solution |
| Received:August 27, 2012 Revised:September 07, 2012 |
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| DOI：10.3969/j.issn.1007-7545.2013.03.013 |
| KeyWord:gold; cementation; thiosulphate; copper powder; ethylenediamine tetraacetic acid disodium |
| Author | Institution |
| Wang Zhike |
河南师范大学化学与环境科学学院 河南省环境污染控制重点实验室 |
| Li Juan |
河南师范大学化学与环境科学学院 河南省环境污染控制重点实验室 |
| Li Yongfang |
河南师范大学化学与环境科学学院 河南省环境污染控制重点实验室 |
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| Abstract: |
| The negative effect of cupric ions as oxidant in thiosulphate leaching system on gold cementation from thiosulphate solution with copper powder was investigated. The results show that adding ethylenediamine tetraacetic acid disodium into leaching solution can eliminate the inhibitory effect of cupric ions and improve the cementation rate of gold. The common causes of the negative effect of the oxidants from thiocyanate, thiourea and thiosulphate leaching systems on gold cementation from the corresponding leaching solution are compared. The common characteristics of the methods to eliminate the negative effects are analyzed. |
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