从sphalerite-galena缩物中出和,使用基于胆酸盐的深层欧性溶剂:烤和作为氧化剂的影响
Katherine Moreno1, Ximena Díaz1, Diana Endara1
1Department of Extractive Metallurgy, Escuela Politécnica Nacional, Ladrón de Guevara E11-253, P.O. Box 17-01-2759, Quito 170525, Ecuador.
Molecules (Basel, Switzerland)
|August 29, 2024
概括
深度浸泡溶剂 (DES) 为从初级来源提取和提供了更绿色的替代方案. 结合烤和可显著提高金属回收,实现两种金属的几乎完全提取.
科学领域:
- 绿色化学 绿色化学
- 金工程 金工程 金工程
- 环境科学 环境科学
背景情况:
- 传统的和开采方法对环境产生了重大影响.
- 深度浸泡溶剂 (DES) 为金属回收提供了污染较小的替代方案.
- 基于胆化物 (ChCl) 的DES正在探索它们在可持续金属开采中的潜力.
研究的目的:
- 调查三种基于CHCl的DES在从球石凝中回收 (Zn) 和 (Pb) 的有效性.
- 评估烤前处理和添加对金属回收率的影响.
- 为了比较DES漏的性能与传统的酸漏方法.
主要方法:
- 在未经处理和烤的斯法莱里特-烯缩物上进行了浸出试验,使用三个DES (1:2 ChCl-尿素, 1:2 ChCl-乙烯基醇, 1:2 ChCl-糖) 在30°C下24小时.
- 作为氧化剂的作用在漏过程中进行了评估.
- 量化了金属回收效率,并与硫酸和酸漏的结果进行了比较.
主要成果:
- 使用DES出未经处理的缩物产生了较低的回收率 (2% Zn,14% Pb).
- 将添加到未经处理的缩物中,显著改善了恢复 (11% Zn,99% Pb).
- 在出水之前烤缩物使 Zn 回收率提高到 75%,而 Pb 提高到 90%.
- 结合烤和,实现了Zn和Pb (99%) 的最大回收.
结论:
- 基于胆化物的深度浸泡溶剂显示出作为和回收的环保替代品的巨大潜力.
- 预处理方法,如烤和使用氧化剂,如,对于优化金属提取效率至关重要.
- DES为可持续的金工艺提供了一个有前途的途径,减少与初级金属生产相关的环境足迹.
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