Multi-Objective Optimization of the Recovery of Base and Precious Metals from Waste Printed Circuit Boards by Two-Stage Hydrometallurgical Process Using Taguchi-Based Grey Relationship Analysis

IF 2.5 3区材料科学 Q3 GREEN & SUSTAINABLE SCIENCE & TECHNOLOGY

Journal of Sustainable Metallurgy Pub Date : 2024-06-03 DOI:10.1007/s40831-024-00850-1

Serdar Aral, Ayşe Vildan Beşe

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Abstract

This study focused on determining the optimum conditions for the maximum recovery of base and precious metals from printed circuit boards of end-of-life desktop computer motherboards using Taguchi-based grey relation analysis. In the first stage of the two-stage study, optimum conditions were investigated for the dissolution of base metals (copper and zinc) in waste printed circuit boards under high-pressure leaching. The dissolution of base metals was performed based on the L25 orthogonal array designed by Taguchi method. In the second step, designed according to Taguchi L9 orthogonal array to recover gold and silver from the solid remaining from the pressure-leaching process. Optimum combinations of parameters in both stages were determined using the multi-criteria optimization technique grey relationship analysis. In the experiments carried out in the determined optimum combinations, 99.62% of copper, 98.76% of zinc, 99.15 of silver and 85.82% of gold in waste printed circuit boards were recovered.

Graphical Abstract

Abstract Image

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利用基于田口灰色关系分析的两阶段湿法冶金工艺从废印刷电路板中回收贱金属和贵金属的多目标优化方案

本研究的重点是利用基于田口灰色关系分析的方法，确定从报废台式电脑主板的印刷电路板中最大限度回收贱金属和贵金属的最佳条件。在两阶段研究的第一阶段，研究了高压浸出法溶解废印刷电路板中贱金属（铜和锌）的最佳条件。贱金属的溶解是根据田口方法设计的 L25 正交阵列进行的。第二步，根据 Taguchi L9 正交阵列设计，从压力浸出过程中剩余的固体中回收金和银。两个阶段的最佳参数组合均采用多标准优化技术灰色关系分析法确定。在确定的最佳组合下进行的实验中，废印刷电路板中的铜回收率为 99.62%，锌回收率为 98.76%，银回收率为 99.15%，金回收率为 85.82%。图文摘要

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来源期刊

Journal of Sustainable Metallurgy Materials Science-Metals and Alloys

CiteScore

4.00

自引率

12.50%

发文量

151

期刊介绍： Journal of Sustainable Metallurgy is dedicated to presenting metallurgical processes and related research aimed at improving the sustainability of metal-producing industries, with a particular emphasis on materials recovery, reuse, and recycling. Its editorial scope encompasses new techniques, as well as optimization of existing processes, including utilization, treatment, and management of metallurgically generated residues. Articles on non-technical barriers and drivers that can affect sustainability will also be considered.