Electronic waste (e‐waste) contains metallic values that can be recovered by hydrometallurgical methods. This investigation addresses the leaching kinetics of e‐waste for the recovery of copper in H₂SO₄‐H₂O₂ media with the objective of determining the rate‐controlling step in monosize particle systems. The results are then used to develop a kinetic model for copper dissolution in multisize particle systems. It is shown that in a monosize particle system, Cu dissolves completely in 150 min at 2 M H₂SO₄ and 0.2 M H₂O₂. The rate‐controlling step for this process is chemical reaction with an activation energy of 47.8 kJ/mol. The kinetic model for Cu dissolution in multisize particle systems is developed by applying an optimization method that considers the size distribution and the copper content of each of the size fractions. The results show that the model predicts satisfactorily the Cu dissolution kinetics and reveals that Cu particles with mean sizes of 79, 141, 237, 398.5, and 605 μm react completely in times varying from 15 to 120 min. Coarser Cu particles do not react completely in a time interval of up to 120 min. E‐waste losses 57.6% of its initial weight when subjected to the leaching process and solid residue has gold and silver grades of 2 402.35 and 9 035.29 g/ton, respectively.

中文翻译：

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用于回收铜的电子废物的浸出动力学：多尺寸颗粒系统中的速率控制步骤和速率过程

电子废物（电子废物）包含可以通过湿法冶金方法回收的金属价值。这项研究旨在研究电子废物在H ₂ SO _4- H ₂ O ₂介质中用于铜回收的浸出动力学，目的是确定单一尺寸颗粒系统中的速率控制步骤。然后将结果用于建立多尺寸颗粒系统中铜溶解的动力学模型。结果表明，在单粒径颗粒体系中，Cu在2 MH ₂ SO ₄和0.2 MH ₂ O _2下在150分钟内完全溶解。。该过程的速率控制步骤是化学反应，其活化能为47.8 kJ / mol。通过应用一种优化方法来开发多尺寸颗粒系统中铜溶解的动力学模型，该方法考虑了尺寸分布和每个尺寸部分的铜含量。结果表明，该模型可以令人满意地预测Cu的溶解动力学，并且揭示平均粒径为79、141、237、398.5和605μm的Cu颗粒在15到120分钟之间可以完全反应。粗铜颗粒在长达120分钟的时间内不会完全反应。进行浸出处理后，电子废物损失了其初始重量的57.6％，固体残渣的金和银等级分别为2 402.35和9 035.29 g /吨。