| 从难处理金矿中回收金:黄铁矿对硫脲浸金体系稳定性的影响 |
| |
| 引用本文： | Hong Qin,Xue-yi Guo,Qing-hua Tian,Lei Zhang. 从难处理金矿中回收金:黄铁矿对硫脲浸金体系稳定性的影响[J]. 矿物冶金与材料学报, 2021, 28(6): 956-964. DOI: 10.1007/s12613-020-2142-9 |
| |
| 作者姓名： | Hong Qin Xue-yi Guo Qing-hua Tian Lei Zhang |
| |
| 作者单位： | School of Metallurgy and Environment, Central South University, Changsha 410083, China;School of Metallurgy and Environment, Central South University, Changsha 410083, China;National & Regional Joint Engineering Research Center of Nonferrous Metal Resource Recycling, Changsha 410083, China |
| |
| 摘 要： | The extraction of gold from refractory gold ores (RGOs) without side reactions is an extremely promising endeavor. However, most RGOs contain large amounts of sulfide, such as pyrite. Thus, investigation of the influence of sulfide on the gold leaching process is important to maximize the utilization of RGOs. In this work, the effects of pyrite on the stability of the thiourea system were systematically investigated under different conditions. Results showed that the decomposition rate of thiourea was accelerated sharply in the presence of pyrite. The effect of pyrite on gold recovery in thiourea leaching systems was then confirmed via a series of experiments. The decomposition efficiency of thiourea decreased by 40% and the recovery efficiency of gold increased by 56% after the removal of sulfide by roasting. Under optimal conditions, the efficiency of the gold recovery system increased to 83.69% and only 57.92% of thiourea decomposition was observed. The high consumption of thiourea by the leaching system may be attributed to not only adsorption by mineral particles but also catalytic decomposition by some impurities in the ores, such as pyrite and soluble ferric oxide.
|
| 关 键 词： | ; ; ; |
Recovery of gold from refractory gold ores: Effect of pyrite on the stability of the thiourea leaching system |
| |
| Hong Qin,Xue-yi Guo,Qing-hua Tian,Lei Zhang. Recovery of gold from refractory gold ores: Effect of pyrite on the stability of the thiourea leaching system[J]. International Journal of Minerals,Metallurgy and Materials, 2021, 28(6): 956-964. DOI: 10.1007/s12613-020-2142-9 |
| |
| Authors: | Hong Qin Xue-yi Guo Qing-hua Tian Lei Zhang |
| |
| Abstract: | The extraction of gold from refractory gold ores (RGOs) without side reactions is an extremely promising endeavor. However, most RGOs contain large amounts of sulfide, such as pyrite. Thus, investigation of the influence of sulfide on the gold leaching process is important to maximize the utilization of RGOs. In this work, the effects of pyrite on the stability of the thiourea system were systematically investigated under different conditions. Results showed that the decomposition rate of thiourea was accelerated sharply in the presence of pyrite. The effect of pyrite on gold recovery in thiourea leaching systems was then confirmed via a series of experiments. The decomposition efficiency of thiourea decreased by 40％ and the recovery efficiency of gold increased by 56％ after the removal of sulfide by roasting. Under optimal condi-tions, the efficiency of the gold recovery system increased to 83.69％ and only 57.92％ of thiourea decomposition was observed. The high con-sumption of thiourea by the leaching system may be attributed to not only adsorption by mineral particles but also catalytic decomposition by some impurities in the ores, such as pyrite and soluble ferric oxide. |
| |
| Keywords: | thiourea leaching stability pyrite refractory gold ores |
| 本文献已被 万方数据 等数据库收录！ |
| 点击此处可从《矿物冶金与材料学报》浏览原始摘要信息 |
|
点击此处可从《矿物冶金与材料学报》下载免费的PDF全文 |
|
