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| Cu-PGMs合金电解阳极泥中EDTA·2Na浸铜动力学 |
| Kinetics analysis on the leaching process of Cu from electrolytic anode mud of Cu-PGMs alloy by using EDTA·2Na solution |
| Received:January 08, 2023 |
| DOI： |
| 中文关键词: 铜-铂族金属合金 阳极泥 铜浸出 内扩散控制 表观活化能 |
| 英文关键词: Cu-PGMs alloy anode mud copper leach internal diffusion control apparent activation energy |
| 基金项目:中色集团科技项目(2022KJJH09)；国家重点研发计划(2020YFC1909003) |
| Author Name | Affiliation | | ZHANG Yabo | School of Metallurgy, Northeastern University, Shenyang 110819, China
Key Laboratory for Recycling of Nonferrous Metal Resource Shenyang, Shenyang 110819, China | | XIAO Faxin | School of Metallurgy, Northeastern University, Shenyang 110819, China
Key Laboratory for Recycling of Nonferrous Metal Resource Shenyang, Shenyang 110819, China | | CAO Xinyu | School of Metallurgy, Northeastern University, Shenyang 110819, China | | YANG Cuixia | School of Metallurgy, Northeastern University, Shenyang 110819, China | | ZHAO Yaru | School of Metallurgy, Northeastern University, Shenyang 110819, China | | HE Ziqi | School of Metallurgy, Northeastern University, Shenyang 110819, China | | SUN Shuchen | School of Metallurgy, Northeastern University, Shenyang 110819, China
Key Laboratory for Recycling of Nonferrous Metal Resource Shenyang, Shenyang 110819, China | | TU Ganfeng | School of Metallurgy, Northeastern University, Shenyang 110819, China
Key Laboratory for Recycling of Nonferrous Metal Resource Shenyang, Shenyang 110819, China |
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| 中文摘要: |
| 以Cu-PGMs合金电解所得铜阳极泥为原料，采用EDTA·2Na浸出阳极泥中的铜和其他贱金属，达到富集阳极泥中贵金属的目的。通过单因素实验，探究了EDTA·2Na浓度、反应温度、浸出时间、搅拌速率、液固比等工艺条件对铜浸出率的影响，得出适宜的浸出条件为EDTA·2Na浓度0.3 mol/L、温度55 ℃、浸出时间3 h、搅拌速率250 r/min、液固比10:1，该条件下铜的浸出率可达91.12%。同时，对EDTA·2Na浸出阳极泥中的铜的动力学进行了分析，结果表明EDTA·2Na的浸出过程符合未反应核的收缩模型，为内扩散控制，其浸出的表观活化能(Ea)为8.6 kJ/mol，浸出动力学方程为1﹣3(1﹣RCu)2/3+2(1﹣RCu)=0.13117 t。 |
| 英文摘要: |
| EDTA·2Na was used to leach copper-containing anode mud produced in the electrolysis process of Cu-PGMs alloy, with an aim of removing Cu and enriching the precious metals. Through single-factor experiments, the effects of process conditions of EDTA·2Na concentration, reaction temperature, leaching time, stirring speed and liquid-solid ratio on the leaching rate of Cu were investigated. It was concluded that the leaching rate of copper was 91.12% under the appropriate conditions of 0.3 mol/L of EDTA·2Na, a temperature of 55 °C, a leaching time for 3 h, a stirring speed at 250 r/min, and a liquid-solid volume-to-mass ratio of 10:1. The dynamics on copper leaching by EDTA·2Na solution from anode mud were analyzed, and the process was determined to be an internal diffusion controlling model, with a kinetic equation of 13(1x)2/3+2(1x)=13.117 t×10-2. The apparent activation energy Ea is 8.6 kJ/mol. |
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