In this study, an ASPEN Plus model in steady state, based on experimental studies, was developed to investigate the leaching behavior of copper and cobalt minerals in sulfuric acid-sodium metabisulfite media. The experimental results indicated that copper and cobalt dissolution efficiencies reach 91 and 72%, respectively. The integration of experimental parameters set-up in the ASPEN Plus simulator allowed the reliability of the developed model. The sensitivity analysis performed highlighted the relative effect of acid concentration, leaching time, temperature, and sodium metabisulfite on the leaching process. Moreover, it revealed that the dissolution of copper minerals was mainly enhanced by the increasing sulfuric acid mass flow rate. The dissolution of cobalt from asbolane was promoted by increasing sulfuric acid mass flow rate, while the extraction of cobalt contained in heterogenite highly depended on sodium metabisulfite (Na₂S₂O₅) mass flow rate. However, a marginal decrease in copper recovery was observed by increasing the mass flow rate of sodium metabisulfite. ASPEN Plus simulated results showed that the leaching recovery could reach 99.77% and 97.92% for copper and cobalt under optimized operating conditions, respectively.

Graphical Abstract

中文翻译：

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酸还原介质中铜和钴矿物同时浸出的模拟：敏感性分析和优化

在本研究中，基于实验研究开发了一个稳态 ASPEN Plus 模型，用于研究铜和钴矿物在硫酸-焦亚硫酸钠介质中的浸出行为。实验结果表明，铜和钴的溶解效率分别达到 91% 和 72%。在 ASPEN Plus 模拟器中设置的实验参数的集成允许开发模型的可靠性。进行的敏感性分析突出了酸浓度、浸出时间、温度和焦亚硫酸钠对浸出过程的相对影响。此外，它表明铜矿物的溶解主要是通过增加硫酸质量流量来增强的。通过增加硫酸质量流量促进钴从黄芪甲烷中的溶解，₂ S ₂ O ₅ ) 质量流量。然而，通过增加焦亚硫酸钠的质量流速观察到铜回收率略有下降。ASPEN Plus 模拟结果表明，在优化的操作条件下，铜和钴的浸出回收率分别可以达到 99.77% 和 97.92%。

图形概要