Enhance recovery mechanism of difficult to enrich copper oxide component in copper smelting slag: Sulfidization-xanthate flotation

IF 13.3 1区工程技术 Q1 ENGINEERING, CHEMICAL

Chemical Engineering Journal Pub Date : 2024-11-25 DOI:10.1016/j.cej.2024.157857

Xingcai Yu, Han Wang, Liang Wang, Yuqiang Mao, Dianwen Liu

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引用次数: 0

Abstract

Copper smelting slag (CS), which is often overlooked, is a valuable solid-waste resource for reclaiming copper. Flotation is the most cost-effective method for its recovery. While most of the copper fraction can be easily recovered utilizing xanthate collection. However, the recovery effect of copper oxide components is poor, resulting in the waste of a large amount of copper resources. The sulfidization-xanthate method has exhibited some efficacy in recovering CS, due to its high economic value. However, the mechanism of using this method to recover CuO from CS is still unclear. This study utilized CuO samples to explore the recovery mechanism of the copper oxide fraction in CS within the sulfidization-xanthate system. Density-functional theory (DFT) theory and X-ray photoelectron spectroscopy (XPS) elucidated the sulfidization mechanism on the CuO surface, revealing the S formation of a Cu-S chemical bond on the CuO surface via chemisorption. Cu(I)-S and S_n²⁻, are the key species in activating CuO. Thermogravimetry analysis (TGA) identified that the CuO sulfidized surface adsorption less water than CuO surface. Zeta potential, ultraviolet visible (UV) and fourier transform infrared (FT-IR) tests illustrated the adsorption of sodium butyl xanthate (SBX) collection, exhibiting increased xanthate adsorption after Na₂S treatment. Molecular dynamics (MD) simulation indicated the relative concentration of water molecules on the surface of CuO sulfidized had decreased, while the SBX had increased. Flotation tests confirmed the recoverability of CuO using this method. The extended Derjaguin Landau Verwey Overbeek (EDLVO) theory illustrates that the adhesion between the CuO particles and bubbles is promoted. Overall, the sulfidization-xanthate method can enhance the recovery of CuO and provide theoretical guidance for practical production. It also lays the theoretical foundation for future studies.

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铜冶炼渣中难以富集的氧化铜成分的强化回收机制：硫化-黄原酸盐浮选法

铜冶炼渣（CS）经常被忽视，但它却是回收铜的宝贵固体废物资源。浮选是回收铜的最具成本效益的方法。虽然利用黄原酸盐收集法可以轻松回收大部分铜馏分。但氧化铜成分的回收效果较差，造成大量铜资源的浪费。硫化-黄原酸盐法由于具有较高的经济价值，在回收 CS 方面取得了一定的效果。然而，使用这种方法从 CS 中回收 CuO 的机理仍不清楚。本研究利用 CuO 样品来探索硫化-黄原酸盐体系中 CS 中氧化铜部分的回收机制。密度泛函理论（DFT）和 X 射线光电子能谱（XPS）阐明了 CuO 表面的硫化机制，揭示了通过化学吸附作用在 CuO 表面形成 Cu-S 化学键。Cu(I)-S 和 Sn2- 是活化 CuO 的关键物种。热重分析（TGA）表明，硫化的 CuO 表面比 CuO 表面吸附更少的水分。Zeta电位、紫外可见光（UV）和傅立叶变换红外（FT-IR）测试表明，Na2S处理后，黄原酸丁酯钠（SBX）的吸附量增加。分子动力学（MD）模拟表明，硫化 CuO 表面水分子的相对浓度降低，而 SBX 的浓度增加。浮选试验证实了这种方法的 CuO 回收率。扩展的 Derjaguin Landau Verwey Overbeek（EDLVO）理论说明，氧化铜颗粒与气泡之间的粘附力得到了促进。总之，硫化-黄原酸盐法可以提高 CuO 的回收率，为实际生产提供理论指导。这也为今后的研究奠定了理论基础。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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来源期刊

Chemical Engineering Journal 工程技术-工程：化工

CiteScore

21.70

自引率

9.30%

发文量

6781

审稿时长

2.4 months

期刊介绍： The Chemical Engineering Journal is an international research journal that invites contributions of original and novel fundamental research. It aims to provide an international platform for presenting original fundamental research, interpretative reviews, and discussions on new developments in chemical engineering. The journal welcomes papers that describe novel theory and its practical application, as well as those that demonstrate the transfer of techniques from other disciplines. It also welcomes reports on carefully conducted experimental work that is soundly interpreted. The main focus of the journal is on original and rigorous research results that have broad significance. The Catalysis section within the Chemical Engineering Journal focuses specifically on Experimental and Theoretical studies in the fields of heterogeneous catalysis, molecular catalysis, and biocatalysis. These studies have industrial impact on various sectors such as chemicals, energy, materials, foods, healthcare, and environmental protection.