铁化物与离子在化物漂浮中的相互作用
Xiaoxia Yang1,2, Yufan Mu2,3, Shiqi Liu4
1School of Mechanical Engineering, Taiyuan University of Science and Technology, Taiyuan 030024, China.
Molecules (Basel, Switzerland)
|June 19, 2024
概括
铁化物强烈抑制了铁矿浮动,但离子可以完全激活它. 这种相互作用是改善从金矿石矿石中提取黄金的关键.
科学领域:
- 矿产加工和提取性金 矿产加工和提取性金
- 表面化学 表面化学
- 地质化学 地质化学
背景情况:
- 铁化物是工艺水中普遍存在的化物物种,但其在金矿石浮动中的特定作用尚不清楚.
- 离子对化物漂浮的影响,特别是在化铁的存在下,需要进行详细的研究.
研究的目的:
- 为了阐明铁化物 (Fe(CN) 63-) 和离子在化物漂浮过程中的相互作用.
- 调查Fe (CN) 的强抑郁机制和酸盐上的离子随后的激活机制.
主要方法:
- 进行了浮动实验,以评估在不同化学条件下矿回收.
- 采用泽塔电位测量来了解表面电荷相互作用.
- 使用了包括低温X射线光电子谱学 (Cryo-XPS) 和电化学阻抗谱学 (EIS) 在内的表面分析技术.
主要成果:
- 铁酸的添加大大降低了矿的回收率,从大约51.3%降至8.6%.
- 随后添加的离子显著增加了矿的回收率,从8.6%增加到91%,证明了完全的激活.
- 表面分析表明Fe (CN) -3-吸附形成了水友的普鲁士蓝色层,然后通过静电相互作用被氧化/氧化物覆盖.
结论:
- 铁化物作为强烈的压抑剂,由于形成水友的普鲁士蓝色层,对化物浮动起到作用.
- 离子通过吸附到表面并克服压缩效应,有效地激活了金浮动.
- 了解这些相互作用可以带来最优化的漂浮过程,从金矿石矿石中回收黄金.
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