Chaka Kaleb Jia, Rupprecht Steven M
Unity University, Addis Ababa, Ethiopia.
South African Institute of Mining and Metallurgy (SAIMM), Johannesburg, South Africa.
Sci Rep. 2024 Oct 3;14(1):22952. doi: 10.1038/s41598-024-69646-3.
One of the main unit operations in metallurgical processing plant designs is gold leaching. The traditional cyanidation process was chosen and is currently in widespread use. However, the mining sector is looking for lixiviants other than cyanide. Cyanide's effects on the environment have made it difficult for humans and other biotic creatures to survive. There is now research to discover a substitute for this cyanide. It is currently argued that thiosulfate is a preferable substitute for cyanide. The effectiveness of thiosulfate as a leaching agent in carbonaceous gold-bearing ores in Ethiopia is discussed in this paper compared to cyanide. The study has looked into the advantages of employing thiosulfate over cyanide from a technical, and economic standpoint. The leaching effects of both lixiviants on carbonaceous gold-bearing ores extracted from MIDROC Legadembi Open Pit mine in Southern Ethiopia, Oromia region, were examined in a laboratory experiment. After 48 h of leaching, it was discovered that thiosulfate has a better and quicker recovery of 91.54% over 61.70% of cyanide recovery. Tables and graphs are used to demonstrate thiosulfate's technical advantage over cyanide. As a result, this paper provides evidence regarding the Legadembi gold mine in Ethiopia's amenability to thiosulfate leaching on carbonaceous gold-bearing ores. A further research perspective is also sought for thiosulfate leaching in other refractory ores.
冶金加工厂设计中的主要单元操作之一是金浸出。选择了传统的氰化工艺，目前该工艺仍在广泛使用。然而，采矿业正在寻找除氰化物以外的浸出剂。氰化物对环境的影响使得人类和其他生物难以生存。目前正在进行研究以寻找这种氰化物的替代品。目前有人认为硫代硫酸盐是氰化物的一种更合适的替代品。本文将硫代硫酸盐与氰化物相比，讨论了其作为埃塞俄比亚含碳金矿石浸出剂的有效性。该研究从技术和经济角度探讨了使用硫代硫酸盐优于氰化物的优点。在实验室实验中，研究了这两种浸出剂对从埃塞俄比亚南部奥罗米亚地区MIDROC Legadembi露天矿开采的含碳金矿石的浸出效果。浸出48小时后，发现硫代硫酸盐的回收率更高、更快，为91.54%，而氰化物的回收率为61.70%。通过表格和图表展示了硫代硫酸盐相对于氰化物的技术优势。因此，本文提供了关于埃塞俄比亚Legadembi金矿对含碳金矿石进行硫代硫酸盐浸出的适用性的证据。还寻求了硫代硫酸盐在其他难处理矿石中浸出的进一步研究前景。
