Energy-efficient fluorine-free electro-refining of crude lead in a green methanesulfonic acid system
- 点击次数：
- 影响因子：7.2
- DOI码：10.1016/j.jece.2023.111580
- 发表刊物：JOURNAL OF ENVIRONMENTAL CHEMICAL ENGINEERING
- 关键字：Crude lead;
Electro-refining;
Methanesulfonic acid;
Cathodic deposit morphology;
Valuable elements distribution
- 摘要：Conventional crude lead electro-refining based on fluosilicic acid (H2SiF6) system is suffering unwelcome environment burden due to the high volatility and instability of H2SiF6. Recycling secondary lead (Pb) resource resulted in high-content antimony (Sb) in the crude lead. Herein, we proposed a green, efficient and safe methanesulfonic acid (MSA) system for fluorine-free electro-refining process of Sb-rich crude Pb. Influencing mechanism of MSA concentration, additive content, Pb ion concentration, cathodic current density, solution temperature on morphology control and energy performance was investigated. Electro-refining simulation and verification in the MSA system achieved an energy consumption of 119.9 kWhe/t Pb and a current efficiency of 99.23%, which were competitive with 145 kWhe/t Pb and 97.99% in the H2SiF6 system. The Pb purity of the deposit sample was as high as 99.99%. The MSA system had favorable Sb tolerance (4-5% Sb), which was higher than the H2SiF6 system (<= 0.8% Sb). Current research provided a technically-and economically-feasible solution for the electro-refining of crude lead with high Sb content.
- 论文类型：期刊论文
- 论文编号：111580
- 学科门类：工学
- 一级学科：冶金工程
- 文献类型：J
- 卷号：11
- 期号：6
- 是否译文：否
- 发表时间：2023-12-01
- 收录刊物：SCI、SSCI、EI
