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投稿时间：2022-06-10 修订日期：2022-06-14
投稿时间：2022-06-10 修订日期：2022-06-14
中文摘要: 以废旧三元正极材料作为原料，提出了还原焙烧与氨基磺酸浸出相结合的工艺，提高锂的回收效率，同时实现组分的分步分离回收。在焙烧温度650 ℃、碳用量10%、还原焙烧时间90 min条件下，三元正极材料被还原为Li2CO3、NiO、MnO、Ni、Co的混合物，还原焙烧产物分步浸出，水浸回收锂，酸浸回收镍、钴、锰。采用氨基磺酸浸出水浸渣，最佳酸浸条件：氨基磺酸浓度0.75 mol/L、浸出温度60 ℃、固液比28 g/L、浸出时间40 min，此条件下镍、钴、锰的浸出率分别可以达到98.77%、98.71%、98.45%。
Abstract:A process combining reduction roasting with sulfamic acid leaching was proposed for leaching of valuable metals from spent LiNixCoyMn1-x-yO2(NCM) cathode materials to improve recovery efficiency of lithium, and realize separation and recovery of components. The results indicate that Li2CO3, NiO, MnO, Ni and Co are mainly reduction products at 650 ℃ for 90 min with 10% carbon in the reduction roasting process. Lithium is effectively recovered through reduction roasting - water leaching from spent NCM cathode materials. Subsequently, sulfamic acid is selected as leaching agent to recover Ni, Co, Mn. Leaching rate of Ni, Co, and Mn is 98.77%, 98.71% and 98.45% respectively under the optimum acid leaching conditions including sulfamic acid concentration of 0.75 mol/L, leaching temperature of 60 ℃, ratio of solid to liquid of 28 g/L, and leaching time of 40 min.
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基金项目:国家自然科学基金资助项目(52174391)
| 作者 | 单位 | |
| 潘越 | 中南大学 化学化工学院 | 202312146@csu.edu.cn |
| 叶华* | 中南大学 化学化工学院 | 18960949363@163.com |
| 李昊昱 | 中南大学 化学化工学院 | 212211012@csu.edu.cn |
引用文本：
潘越,叶华,李昊昱.还原焙烧分步浸出工艺从废旧锂离子电池中回收有价金属[J].有色金属（冶炼部分）,2022(10):1-7.
PAN Yue,YE Hua,LI Hao-yu.Recovery of Valuable Metals from Spent Lithium Ion Batteries via Reduction Roasting and Sulfamic Acid Leaching[J].Nonferrous Metals (Extractive Metallurgy),2022(10):1-7.
潘越,叶华,李昊昱.还原焙烧分步浸出工艺从废旧锂离子电池中回收有价金属[J].有色金属（冶炼部分）,2022(10):1-7.
PAN Yue,YE Hua,LI Hao-yu.Recovery of Valuable Metals from Spent Lithium Ion Batteries via Reduction Roasting and Sulfamic Acid Leaching[J].Nonferrous Metals (Extractive Metallurgy),2022(10):1-7.
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