用于电镀污泥可持续回收的创新水冶技术

S. Brožová, Jaromír Drápala, J. Brož, Adéla Macháčková
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摘要

摘要 本文探讨了从电镀过程中产生的废电镀污泥中回收锌和铁的可行性。电镀污泥的特点是重金属浓度较高,适合进行湿法冶金回收。实验和实践阶段的主要目标是通过浸出电镀污泥提取锌和铁。沥滤过程使用不同温度和时间长度的硫酸,并通过引入过氧化氢或臭氧等氧化剂进行强化。随后通过过滤实现浸出液和滤液的分离。沥滤液还需进行其他处理,包括使用各种药剂沉淀铁和其他金属。进一步过滤后,采用电解法,利用约 3 V 的电压在阴极上获得纯锌。对所有中间产物进行了全面的化学分析,包括浸出液、浸出液、滤液、固体沉淀物和阴极上的分离金属。这些分析结果以表格和图表的形式进行了详细介绍。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
Innovative Hydrometallurgy for Galvanic Sludge Sustainable Recovery
Abstract The manuscript explores the feasibility of recovering zinc and iron from waste galvanic sludge generated during galvanic plating processes. Galvanic sludge, characterized by elevated concentrations of heavy metals, represents a suitable candidate for hydrometallurgical recycling. The primary objective of the experimental and practical phases was to extract zinc and iron through the leaching of galvanic sludge. Leaching procedures were conducted using sulfuric acid at varying temperatures and time durations, augmented by the introduction of oxidizing agents such as hydrogen peroxide or ozone. Subsequent separation of the leach and filtrate was achieved through filtration. The leachate underwent additional processing involving the precipitation of iron and other metals, employing diverse agents. Following further filtration, electrolysis was employed to attain pure zinc on the cathode, utilizing an electrical voltage of approximately 3 V. Comprehensive chemical analyses were conducted on all intermediate products, including the leachate, leach liquor, filtrate, solid precipitate, and the separated metal on the cathode. The outcomes of these analyses are meticulously presented in tables and graphs.
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