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| Comparative study of SART method and complexation precipitation method for the treatment of copper-cyanide barren solution |
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Received:June 26, 2023
Revised:July 11, 2023
Accepted:July 12, 2023
Published Online:December 22, 2023
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| DOI： |
| KeyWord:Copper-cyanide barren solution; Complexation precipitation; Valuable component recovery; Response surface methodology |
| Author | Institution |
| LIU Qiang |
College of Environmental Resources Sciences,Zhejiang University,Hangzhou,Zhejiang Province |
| WU Zengling |
Zijin Mining Group Co,Ltd,Longyan,Fujian Province |
| GAO Shikang |
Zijin Mining Group Co,Ltd,Longyan,Fujian Province |
| WANG Hong |
Zijin Mining Group Co,Ltd,Longyan,Fujian Province |
| Han Liang |
Zijin Mining Group Co,Ltd,Longyan,Fujian Province |
| Lin Guoqin |
Zijin Mining Group Co,Ltd,Longyan,Fujian Province |
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| Abstract: |
| For the cyanide barren liquor generated by a gold producer, the cyanide, thiocyanate, gold, silver and copper were recovered by complexation precipitation method, and then further alkali adjustment was used for purification treatment. The effects of the dosage of copper sulfate and sodium sulfite and the initial pH on the removal of cyanide and copper ions were investigated, and the response surface equations for the content of both in the barren solution were established using BBD experimental design and response surface method. By solving the mathematical model, it was found that the cyanide and copper ion concentrations in the treated lean solution reached the lowest values of 0.38 mg/L and 61.94 mg/L at the same time under the conditions of the dosage of 3.01 g/L and 2 g/L of copper sulfate and sodium sulfite, respectively. The results of the validation experiments showed that the predicted values of the response surface method were in good agreement with the experimental results, and the established model had a high degree of confidence. The treated lean liquor was further filtered, adjusted alkali to remove copper, and met the requirements of the conditions for reuse in the production process. |
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