Chemical-Free Method for Recovery of Lead from Spent Lead Paste by Reductive Sulfation Technique from By-product Utilization

IF 2.2 4区 材料科学 Q3 MATERIALS SCIENCE, MULTIDISCIPLINARY
H. M. Ahsen Ilyas, Qingyun Xiong, Jiarong Hu, Botai Li, Deyi Li, Chengzhong Wang, Jinping Xiong, Mohammad Tabish, Khalid M. Alotaibi, Ghulam Yasin
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Abstract

Poisonous wastes, including lead slag, mattes, acidic sludge, particulates, and emissions of airborne gases, are primary industrial wastes related to the lead-acid battery industry. Herein, the phase conversion technique for PbO2/PbSO4 components and impurity contents of spent lead paste were studied. The reductive sulfur fixation technique was employed for the extraction of pure lead product from spent lead paste and immobilizing sulfur, which was relatively improved as compared to the release of sulfur oxides and lead particulates when traditional recycling techniques were used. Furthermore, a bench-scale experiment was carried out for the revival of chemical reagents and removal of impurities from the spent lead paste to understand the reliability and efficiency of this novel method from the perspective of a chemical-free process. The results reveal that the products were achieved in three distinct layers, i.e., impurities-free P-paste, sulfated residue (PbSO4), desulfurized residue (PbCO3) and the final product (α-PbO). In this work, the recovery efficiency of spent lead-acid batteries is higher than 99.9%. Moreover, the metal impurities such as Fe, Sb, Zn, Cu, and Mg were efficiently removed, and 99.89/99.999/99.94% of the reduction/sulfation/carbonization efficiency were achieved. This chemical-free research paves novel and appropriate extraction of lead for engineering and industrial sectors.

Abstract Image

利用副产品还原硫化技术从废铅膏中回收铅的免化学方法
有毒废物,包括铅渣、哑光、酸性污泥、微粒和空气中气体的排放,是与铅酸电池工业有关的主要工业废物。本文研究了废铅膏中PbO2/PbSO4组分和杂质含量的相变技术。采用还原性固硫技术从废铅膏中提取纯铅产品并固定化硫,相对于传统回收工艺中硫氧化物和铅微粒的释放情况有所改善。在此基础上,对废铅膏进行了化学试剂的再生和杂质的去除实验,从无化学过程的角度考察了该方法的可靠性和效率。结果表明,产物分为三层,即无杂质p -膏体、硫酸盐残渣(PbSO4)、脱硫残渣(PbCO3)和最终产物(α-PbO)。在本工作中,废铅酸蓄电池的回收率高于99.9%。除铁、Sb、Zn、Cu、Mg等金属杂质,达到99.89/99.999/99.94%的还原/硫化/碳化效率。这种无化学物质的研究为工程和工业部门提供了新颖而合适的铅提取方法。
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来源期刊
Journal of Materials Engineering and Performance
Journal of Materials Engineering and Performance 工程技术-材料科学:综合
CiteScore
3.90
自引率
13.00%
发文量
1120
审稿时长
4.9 months
期刊介绍: ASM International''s Journal of Materials Engineering and Performance focuses on solving day-to-day engineering challenges, particularly those involving components for larger systems. The journal presents a clear understanding of relationships between materials selection, processing, applications and performance. The Journal of Materials Engineering covers all aspects of materials selection, design, processing, characterization and evaluation, including how to improve materials properties through processes and process control of casting, forming, heat treating, surface modification and coating, and fabrication. Testing and characterization (including mechanical and physical tests, NDE, metallography, failure analysis, corrosion resistance, chemical analysis, surface characterization, and microanalysis of surfaces, features and fractures), and industrial performance measurement are also covered
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