溶解氧在锌浸渣角石硫化—黄药浮选中的双重作用

IF 9 1区工程技术 Q1 ENGINEERING, CHEMICAL

Separation and Purification Technology Pub Date : 2025-04-26 DOI:10.1016/j.seppur.2025.133232

Qing Shi , Feng Zhang , Chao Qi , Yan Miao

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引用次数: 0

摘要

通过硫化-黄原酸盐浮选法从锌浸出残渣（ZLR）中回收有价值的角闪石（PbSO4）时，由于对溶解氧（DO）的影响知之甚少而受到阻碍。本研究阐明了溶解氧在硫化和黄原酸盐吸附阶段的双重作用。微浮选实验表明，在硫化阶段将溶解氧降至最低可减少 Na2S 的用量，而在黄原酸盐调节阶段则需要控制溶解氧水平（5.0-6.0 ppm），以获得最佳角闪石回收率。在硫化阶段，ZETA电位和XPS分析表明，随着溶解氧的增加，表面逐渐氧化，但PbS物种保持相对稳定（0.2-6.0 ppm溶解氧）。在 PAX 调节阶段，吸附量、QCM-D 和傅立叶变换红外测量显示，6.0 ppm DO 增强了硫化角闪石对黄原酸盐的吸附。使用氮调节溶解氧（硫化阶段为百万分之 1.8-4.2；PAX 调节阶段为百万分之 4.2-6.0）进行的基准规模试验获得了更高的铅品位（23.3% 对 19.4%）和相当的铅回收率（60.9% 对 60.6%），同时减少了 26.7% 的 Na2S 用量（14,600 克/吨到 10,700 克/吨）。这些研究结果表明，溶解氧是平衡表面氧化和黄原酸盐吸附的关键操作参数，为从 ZLR 中回收角闪石提供了一种节省试剂的策略。

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Dual role of dissolved oxygen in sulfidation-xanthate flotation of anglesite from zinc leaching residue

The recovery of valuable anglesite (PbSO₄) from zinc leaching residue (ZLR) via sulfidation-xanthate flotation is hindered by poorly understood dissolved oxygen (DO) effects. This study clarifies the dual role of DO across sulfidation and xanthate adsorption stages. Micro-flotation experiments revealed that minimizing DO during the sulfidation stage reduced Na₂S dosage, while optimal anglesite recovery required controlled DO levels (5.0–6.0 ppm) during xanthate conditioning stage. For sulfidation stage, zeta potential and XPS analysis revealed gradual surface oxidation with increasing DO, though PbS species remained relatively stable (0.2–6.0 ppm DO). For PAX conditioning stage, adsorption quantity, QCM-D and FTIR measurements revealed that 6.0 ppm DO enhanced xanthate adsorption on sulfurized anglesite. Bench-scale tests with nitrogen-regulated DO (1.8–4.2 ppm in sulfidation; 4.2–6.0 ppm in PAX conditioning) achieved higher Pb grade (23.3 % vs. 19.4 %) with comparable Pb recovery (60.9 % vs. 60.6 %), alongside a 26.7 % reduction in Na₂S dosage (14,600 to 10,700 g/t). These findings establish DO as a pivotal operational parameter for balancing surface oxidation and xanthate adsorption, offering a reagent-saving strategy for anglesite recovery from ZLR.

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来源期刊

Separation and Purification Technology 工程技术-工程：化工

CiteScore

14.00

自引率

12.80%

发文量

2347

审稿时长

43 days

期刊介绍： Separation and Purification Technology is a premier journal committed to sharing innovative methods for separation and purification in chemical and environmental engineering, encompassing both homogeneous solutions and heterogeneous mixtures. Our scope includes the separation and/or purification of liquids, vapors, and gases, as well as carbon capture and separation techniques. However, it's important to note that methods solely intended for analytical purposes are not within the scope of the journal. Additionally, disciplines such as soil science, polymer science, and metallurgy fall outside the purview of Separation and Purification Technology. Join us in advancing the field of separation and purification methods for sustainable solutions in chemical and environmental engineering.