Iron Removal from Zinc Leaching Solution with High Sulfate Concentration via Hydrothermal Mineralization Precipitation at 150−160°C

IF 2.3 4区材料科学 Q3 MATERIALS SCIENCE, MULTIDISCIPLINARY

JOM Pub Date : 2025-06-24 DOI:10.1007/s11837-025-07546-1

Xiaohua Peng, Bo Yang, Xingbin Li, Xingzheng Dai, Chang Wei, Zhanqing Lu, Zhigan Deng, Minting Li

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Abstract

This study suggests using the hematite process, which operates at a temperature range of 150 − 160°C, to effectively remove iron (Fe) ions from zinc (Zn) leaching solutions. Repeated experiments were carried out in the laboratory to evaluate the practicality and efficiency of the low-temperature hematite process. The findings demonstrated a substantial decrease in the ultimate total Fe concentration in the solution to 1 g/L within a time frame of 180 min. The Fe ions were observed to precipitate as hematite products, which contained more than 55% Fe. The analytical techniques used, XRD, FT-IR, and XPS, revealed that the hematite products were mainly composed of α-Fe₂O₃, α-FeOOH, and small quantities of KFe₃(SO₄)₂(OH)₆ and NaFe₃(SO₄)₂(OH)₆. The sulfate was found to be either wrapped around or embedded within the products. Moreover, the XPS spectra revealed the occurrence of a dehydration phenomenon involving hydrated ferric oxide during the hematite process. The SEM pictures revealed that the hematite products had a morphology characterized by clusters of spherical particles made of ferric oxide and rhombus-shaped crystals composed of jarosite phases. The experimental results confirm the feasibility of the low-temperature (150 − 160°C) hematite process.

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150 ~ 160℃热液矿化沉淀法去除高硫酸盐锌浸出液中的铁

本研究建议使用在150 ~ 160℃范围内工作的赤铁矿工艺，可以有效地去除锌浸出液中的铁离子。在实验室进行了多次试验，对低温赤铁矿工艺的实用性和效率进行了评价。结果表明，在180分钟的时间框架内，溶液中最终总铁浓度大幅下降至1 g/L。铁离子以赤铁矿形式析出，铁含量大于55%。XRD、FT-IR和XPS分析表明，赤铁矿产物主要由α-Fe2O3、α-FeOOH和少量KFe3(SO4)2(OH)6和NaFe3(SO4)2(OH)6组成。硫酸盐被发现包裹在产品周围或嵌入产品中。此外，XPS光谱还揭示了赤铁矿过程中水合氧化铁的脱水现象。SEM图像显示，赤铁矿产品具有由氧化铁组成的球状颗粒簇和黄钾铁矾相组成的菱形晶体的形貌特征。实验结果证实了低温（150 ~ 160℃）赤铁矿工艺的可行性。

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来源期刊

JOM 工程技术-材料科学：综合

CiteScore

4.50

自引率

3.80%

发文量

540

审稿时长

2.8 months

期刊介绍： JOM is a technical journal devoted to exploring the many aspects of materials science and engineering. JOM reports scholarly work that explores the state-of-the-art processing, fabrication, design, and application of metals, ceramics, plastics, composites, and other materials. In pursuing this goal, JOM strives to balance the interests of the laboratory and the marketplace by reporting academic, industrial, and government-sponsored work from around the world.