| 失效锂离子电池正极材料管道化浸出工艺 |
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| 引用本文： | 陈世贤,苏昊,戴曦.失效锂离子电池正极材料管道化浸出工艺[J].有色金属科学与工程,2022,13(3):89-98. |
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| 作者姓名： | 陈世贤 苏昊 戴曦 |
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| 作者单位： | 中南大学冶金与环境学院，长沙 410083 |
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| 摘 要： | 湿法回收是目前回收失效锂离子电池正极材料的主要方法，浸出是该方法的一个关键流程，而工业生产中一般采用槽式浸出，该体系不是封闭的，在反应过程中由于物料中残余的一些杂质在酸性体系下会产生气体，严重恶化生产环境，同时反应会消耗大量的酸碱试剂及氧化剂，并产生大量废水、废酸。针对这些问题，提出采用管式反应器浸出失效锂离子电池正极材料方案，本实验的原料为失效钴酸锂正极材料，研究了不同条件对浸出效果的影响，发现过氧化氢的浸出效果并不理想，并通过采用葡萄糖等固体还原剂，有效地提高浸出率。相同条件下，对比过氧化氢和葡萄糖，钴和锂的浸出率分别从59.18%、92.57%提高到85.95%、99.47%。
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| 关 键 词： | 失效钴酸锂电池 正极材料 管道浸出 浸出率 |
| 收稿时间： | 2021-07-06 |
Pipeline leaching process of the anode material of failed lithium-ion batteries |
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| Affiliation: | School of Metallurgy and Environment, Central South University, Changsha 410083, China |
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| Abstract: | At present, leaching is a key part of wet recovery, the main method to recycle the anode materials of failed lithium-ion batteries. However, tank leaching, generally used in industrial production, is not closed. During the reaction process, some residual impurities in the material will produce gas under the acidic system, which seriously deteriorates the production environment. At the same time, the reaction will consume many acid-base reagents and oxidants and produce a large amount of wastewater and waste acid. In view of these problems, a scheme of using a tubular reactor to leach the cathode material of a failed lithium-ion battery was proposed. The cathode material of failed lithium cobalt oxide was used as the raw material in this experiment. The effects of different conditions on the leaching effect were studied. It is found that the leaching effect of hydrogen peroxide is not ideal, and the leaching rate is effectively improved by using solid reducing agents such as glucose. Under the same conditions, compared with hydrogen peroxide and glucose, the leaching rates of cobalt and lithium increase from 59.18% and 92.57% to 85.95% and 99.47%, respectively. |
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