铁离子氧化方铅矿表面实现黄铜矿–方铅矿高效分离

张前程; 张丽敏; 江锋; 唐鸿鹄; 王丽; 孙伟

doi:10.1007/s12613-023-2674-x

Volume 31 Issue 2

Feb. 2024

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文章导航 > 矿物冶金与材料学报（英文） > 2024 > 31(2): 261-267

Qiancheng Zhang, Limin Zhang, Feng Jiang, Honghu Tang, Li Wang, and Wei Sun, Ferric ion-triggered surface oxidation of galena for efficient chalcopyrite–galena separation, Int. J. Miner. Metall. Mater., 31(2024), No. 2, pp. 261-267. https://doi.org/10.1007/s12613-023-2674-x

Cite this article as:

Qiancheng Zhang, Limin Zhang, Feng Jiang, Honghu Tang, Li Wang, and Wei Sun, Ferric ion-triggered surface oxidation of galena for efficient chalcopyrite–galena separation, Int. J. Miner. Metall. Mater., 31(2024), No. 2, pp. 261-267. https://doi.org/10.1007/s12613-023-2674-x

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研究论文

铁离子氧化方铅矿表面实现黄铜矿–方铅矿高效分离

1)
中南大学矿物加工与生物工程学院, 长沙 410083, 中国
2)
中南大学金属资源开发利用碳减排教育部工程研究中心, 长沙410083, 中国
3)
湖南工商大学资源与环境学院, 长沙 410083, 中国

通讯作者:
江锋 E-mail: feng_jiang@csu.edu.cn

文章亮点

（1）Fe³⁺对方铅矿具有选择性抑制作用

（2）Fe³⁺将方铅矿表面氧化成PbSO₄，而其自身被还原成Fe²⁺

（3）方铅矿表面致密的PbSO₄纳米薄膜有效阻碍了捕收剂的吸附，显著增强了亲水性

中文摘要

黄铜矿和方铅矿的高效浮选分离是实现复杂铜铅矿产资源有效利用的关键，其关键是寻找一种绿色环保、成本低廉的选择性抑制剂。本论文通过纯矿物浮选试验、傅里叶变换红外光谱、扫描电镜、X射线光电子能谱和拉曼光谱等多种技术手段，深入研究了铁离子作为方铅矿选择性抑制剂在铜铅浮选分离中的应用。浮选试验结果表明，当铁离子浓度为50 mg/L时，方铅矿被彻底抑制，而黄铜矿回收率仍达到80%。通过分析药剂在矿物表面的吸附行为发现，铁离子有效降低了乙硫氨酯在方铅矿表面的吸附，而不影响其在黄铜矿表面的吸附。矿物表面微观结构观测结果表明，铁离子能氧化方铅矿表面，形成致密的硫酸铅纳米颗粒薄膜，进而有效地抑制了乙硫氨酯在方铅矿表面的吸附，显著增强了方铅矿表面的亲水性。本研究为高效环保分离黄铜矿和方铅矿提供了一个可行的解决方案。

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Research Article

Ferric ion-triggered surface oxidation of galena for efficient chalcopyrite–galena separation

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Abstract

Abstract

The efficient separation of chalcopyrite (CuFeS₂) and galena (PbS) is essential for optimal resource utilization. However, finding a selective depressant that is environmentally friendly and cost effective remains a challenge. Through various techniques, such as microflotation tests, Fourier transform infrared spectroscopy, scanning electron microscopy (SEM) observation, X-ray photoelectron spectroscopy (XPS), and Raman spectroscopy measurements, this study explored the use of ferric ions (Fe³⁺) as a selective depressant for galena. The results of flotation tests revealed the impressive selective inhibition capabilities of Fe³⁺ when used alone. Surface analysis showed that Fe³⁺ significantly reduced the adsorption of isopropyl ethyl thionocarbamate (IPETC) on the galena surface while having a minimal impact on chalcopyrite. Further analysis using SEM, XPS, and Raman spectra revealed that Fe³⁺ can oxidize lead sulfide to form compact lead sulfate nanoparticles on the galena surface, effectively depressing IPETC adsorption and increasing surface hydrophilicity. These findings provide a promising solution for the efficient and environmentally responsible separation of chalcopyrite and galena.
- galena;
- chalcopyrite;
- ferric ions;
- flotation separation;
- surface oxidation

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