Enrichment of copper and recycling of cyanide from copper–cyanide waste by solvent extraction
来源期刊：International Journal of Minerals Metallurgy and Materials2016年第11期
论文作者：Teng-yue Gao Kui-ren Liu Qing Han Bin-shi Xu
文章页码：1258 - 1263
摘 要：The enrichment of copper from copper–cyanide wastewater by solvent extraction was investigated using a quaternary ammonium salt as an extractant. The influences of important parameters, e.g., organic-phase components, aqueous pH values, temperature, inorganic anion impurities, CN/Cu molar ratio, and stripping reagents, were examined systematically, and the optimal conditions were determined. The results indicated that copper was effectively concentrated from low-concentration solutions using Aliquat 336 and that the extraction efficiency increased linearly with increasing temperature. The aqueous pH value and concentrations of inorganic anion impurities only weakly affected the extraction process when varied in appropriate ranges. The CN/Cu molar ratio affected the extraction efficiency by changing the distribution of copper–cyanide complexes. The difference in gold leaching efficiency between using raffinate and fresh water was negligible.
Teng-yue Gao1，Kui-ren Liu1，Qing Han1，Bin-shi Xu2
1. Key Laboratory of Ecological Utilization of Multi-metal Intergrown Ores of the Ministry of Education,School of Metallurgy,Northeastern University2. National Key laboratory for Remanufacturing,Academy of Armored Forces Engineering
摘 要：The enrichment of copper from copper–cyanide wastewater by solvent extraction was investigated using a quaternary ammonium salt as an extractant. The influences of important parameters, e.g., organic-phase components, aqueous pH values, temperature, inorganic anion impurities, CN/Cu molar ratio, and stripping reagents, were examined systematically, and the optimal conditions were determined. The results indicated that copper was effectively concentrated from low-concentration solutions using Aliquat 336 and that the extraction efficiency increased linearly with increasing temperature. The aqueous pH value and concentrations of inorganic anion impurities only weakly affected the extraction process when varied in appropriate ranges. The CN/Cu molar ratio affected the extraction efficiency by changing the distribution of copper–cyanide complexes. The difference in gold leaching efficiency between using raffinate and fresh water was negligible.
关键词：
