School of Environment & Chemical Engineering, Nanchang Hangkong University, 330063, Nanchang, Jiangxi, China; National-Local Joint Engineering Research Center of Heavy Metals Pollutants Control and Resource Utilization, Nanchang 330063, Jiangxi, China.
School of Environment & Chemical Engineering, Nanchang Hangkong University, 330063, Nanchang, Jiangxi, China; National-Local Joint Engineering Research Center of Heavy Metals Pollutants Control and Resource Utilization, Nanchang 330063, Jiangxi, China.
J Environ Manage. 2024 Sep;368:122165. doi: 10.1016/j.jenvman.2024.122165. Epub 2024 Aug 11.
Efficient recovery of valuable metals from copper smelting slag (CSS) can not only alleviate the pressure from resource scarcity, but also has important practical significance for the realization of green and sustainable production in the copper smelting industry. In this paper, a composite medium of FeS-O is used as a synergistic modifier to transform the solid-state valuable metals in CSS into leachable state of sulphates, and achieves efficient and comprehensive recovery of zinc and copper through neutral leaching. XRD, FTIR, XPS, etc and comparative analysis methods are used to deeply analyze the characteristics of occurrence phase and transformation rules of valuable metal in CSS, roasted slag and leached slag. The results show under the optimal roasting conditions of T = 650 °C, M: M = 1:1, V: V = 1:6 and t = 90 min, the recovery rate for zinc is approximately 95.1 %, and that for copper is 99.3 %, almost all of which is recovered. These findings provide a new method and process foundation and theoretical support for the efficient resource utilization of CSS.
从铜冶炼渣（CSS）中高效回收有价金属，不仅可以缓解资源短缺的压力，而且对实现铜冶炼行业绿色可持续生产具有重要的现实意义。本文采用 FeS-O 复合介质作为协同改性剂，将 CSS 中的固态有价金属转化为可浸出的硫酸盐状态，通过中性浸出实现锌和铜的高效综合回收。采用 XRD、FTIR、XPS 等对比分析方法，深入分析了有价金属在 CSS、焙烧渣和浸出渣中的赋存相特征及转化规律。结果表明，在最优的焙烧条件下（T=650°C，M:M=1:1，V:V=1:6，t=90min），锌的浸出率约为 95.1%，铜的浸出率约为 99.3%，几乎全部得到了回收。这些发现为 CSS 有价金属的高效资源利用提供了新的方法和工艺基础及理论支撑。
