New separation technology for lead and mercury from acid sludge of copper smelting using a total hydrometallurgical process

IF 1.5 4区工程技术 Q3 METALLURGY & METALLURGICAL ENGINEERING Mining, Metallurgy & Exploration Pub Date : 2024-05-30 DOI:10.1007/s42461-024-00997-1

Xingxiang Fan, Na Wu, Lida Sun, Yan Jiang, Shasha He, Mengyang Huang, Kunbin Yang, Yang Cao

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Abstract

The separation of lead (Pb) and mercury (Hg) from copper (Cu) smelting acid sludge using the carbonization and acid-leaching total hydrometallurgical process was investigated. The effects of the excess coefficient of sodium carbonate, excess coefficient of nitric acid, conversion time, conversion temperature, dissolution time, and dissolution temperature on the separation efficiency of Pb and Hg were studied. The test results indicated that when the dosage of sodium carbonate was 2.0 times the stoichiometric ratio, the conversion time was 1.5 h, the conversion temperature was 75 ℃, and the amount of nitric acid was 1.8 times the stoichiometric ratio. Additionally, the dissolution time was 1.0 h, the dissolution temperature was 60 ℃, the ratio of liquid–solid was 5:1, and the separation efficiency of Pb and Hg was 98.72%. This study demonstrated the advantages of a short, simple, and environmentally friendly process for separating Pb and Hg from Cu smelting acid sludge, providing complete separation and introducing a new technology.

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利用全湿法冶金工艺从铜冶炼酸性污泥中分离铅和汞的新技术

研究了采用碳化和酸浸全湿法冶金工艺从铜（Cu）冶炼酸性污泥中分离铅（Pb）和汞（Hg）的情况。研究了碳酸钠过量系数、硝酸过量系数、转化时间、转化温度、溶解时间和溶解温度对铅汞分离效率的影响。试验结果表明，当碳酸钠用量为化学计量比的 2.0 倍时，转化时间为 1.5 小时，转化温度为 75 ℃，硝酸用量为化学计量比的 1.8 倍。此外，溶解时间为 1.0 小时，溶解温度为 60 ℃，液固比为 5:1，铅和汞的分离效率为 98.72%。该研究证明了从铜冶炼酸污泥中分离铅和汞的工艺流程短、操作简单、环境友好，可实现完全分离，是一项新技术。

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来源期刊

Mining, Metallurgy & Exploration Materials Science-Materials Chemistry

CiteScore

3.50

自引率

10.50%

发文量

177

期刊介绍： The aim of this international peer-reviewed journal of the Society for Mining, Metallurgy & Exploration (SME) is to provide a broad-based forum for the exchange of real-world and theoretical knowledge from academia, government and industry that is pertinent to mining, mineral/metallurgical processing, exploration and other fields served by the Society. The journal publishes high-quality original research publications, in-depth special review articles, reviews of state-of-the-art and innovative technologies and industry methodologies, communications of work of topical and emerging interest, and other works that enhance understanding on both the fundamental and practical levels.