A new extraction process of carbonaceous refractory gold concentrate
文献类型：期刊论文
| 作者 | Y. Q. Meng |
| 刊名 | Transactions of Nonferrous Metals Society of China
 |
| 出版日期 | 2005 |
| 卷号 | 15期号:5页码:1178-1184 |
| 关键词 | carbonaceous refractory gold concentrate alkaline leaching self-leaching of gold preg robbing thiosulfate leaching process mineralogy thiosulfate cyanide ores |
| ISSN号 | 1003-6326 |
| 中文摘要 | A new hydrometallurgical process for a carbonaceous refractory gold concentrate at ambient temperature and pressure was presented, including grinding-leaching, intensified alkaline leaching (IAL), thiosulfate leaching and cementation by zinc powder. The experimental results show that the grinding-leaching and intensified alkaline leaching process result in the selective oxidation of arsenopyrite and pyrite. The oxidation ratio of As is 96.6%, and 46.7% for S. The total consumption of NaOH in alkaline leaching is only 28% of that theoretically calculated under the conditions of full oxidization for the same amount of arsenopyrite and pyrite transforming into arsenates and Sulfates, and 83.6% of gold is synchro-dissoluted by thiosulfate self-generated during pretreatment. Since the carbonaceous matter in concentrate possesses a strong capability of preg robbing, the cyanidation process is not suitable for the extraction of gold after pretreatment. However, the gold leaching rate by thiosulfate leaching for 24 h is increased to 91.7% from 0-3.2% by ultra-fine grinding without the pretreatment. The recovery of gold by zinc cementation gets to 99.6%. Due to the thiosulfate self-generated during alkaline leaching, the reagent addition in thiosulfate leaching afterwards is lower than the normal one. |
| 原文出处 | |
| 公开日期 | 2012-04-14 |
| 源URL | [http://ir.imr.ac.cn/handle/321006/34984]  |
| 专题 | 金属研究所_中国科学院金属研究所 |
| 推荐引用方式 GB/T 7714 | Y. Q. Meng. A new extraction process of carbonaceous refractory gold concentrate[J]. Transactions of Nonferrous Metals Society of China,2005,15(5):1178-1184. |
| APA | Y. Q. Meng.(2005).A new extraction process of carbonaceous refractory gold concentrate.Transactions of Nonferrous Metals Society of China,15(5),1178-1184. |
| MLA | Y. Q. Meng."A new extraction process of carbonaceous refractory gold concentrate".Transactions of Nonferrous Metals Society of China 15.5(2005):1178-1184. |
入库方式： OAI收割
来源：金属研究所
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