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朱坤, 刘恺华, 黄张团, 颜游子, 董海丽, 黄魁. 废旧锂离子电池中钴的回收[J]. 环境工程学报, 2018, 12(9): 2650-2657. doi: 10.12030/j.cjee.201804058
引用本文: 朱坤, 刘恺华, 黄张团, 颜游子, 董海丽, 黄魁. 废旧锂离子电池中钴的回收[J]. 环境工程学报, 2018, 12(9): 2650-2657. doi: 10.12030/j.cjee.201804058
shu
ZHU Kun, LIU Kaihua, HUANG Zhangtuan, YAN Youzi, DONG Haili, HUANG Kui. Recovery of cobalt in waste lithium ion batteries[J]. Chinese Journal of Environmental Engineering, 2018, 12(9): 2650-2657. doi: 10.12030/j.cjee.201804058
Citation: ZHU Kun, LIU Kaihua, HUANG Zhangtuan, YAN Youzi, DONG Haili, HUANG Kui. Recovery of cobalt in waste lithium ion batteries[J]. Chinese Journal of Environmental Engineering, 2018, 12(9): 2650-2657. doi: 10.12030/j.cjee.201804058
shu

废旧锂离子电池中钴的回收

  • 1.

    广西大学资源环境与材料学院，南宁 530004

  • 2.

    广西贵港北控水务环保有限公司，贵港 537000

  • 基金项目:

    国家自然科学基金资助项目(21767003)

    广西自然科学基金资助项目（2015GXNSFAA139232)

    南宁市科学研究与技术开发项目（20160537）

Recovery of cobalt in waste lithium ion batteries

  • 1.

    School of Resources, Environment and Materials, Guangxi University, Nanning 530004, China

  • 2.

    Guangxi Guigang Beijing Enterprises Water Group Environmental Protection Co.Ltd., Guigang 537000, China

  • Fund Project:

  • 摘要: 采用高温煅烧-酸浸-化学沉淀工艺回收废旧锂离子电池中的钴，根据电极材料的热重性质确定煅烧温度，探究不同因素对钴的浸出和沉淀效果的影响，利用响应面技术优化酸浸过程，并对酸浸液进行回收处理。实验结果表明：煅烧温度为500 ℃时可充分去除黏结剂；优化实验得出H2SO4+H2O2体系浸出钴的最佳实验条件为液固比（mL ：g）6.15，浸出温度96.34 ℃，浸出时间44.52 min，H2SO4浓度1.20 mol·L-1，浸出率97.51%；当浸出液pH为1.5，[C2O42-]/[Co2+]比值为1.10，反应温度为70 ℃，沉淀时间为50 min时，钴的沉淀率为95.69%。回收得到的CoC2O4纯度高，晶体结构较好。
    Abstract: Cobalt was recycled from spent lithium ion batteries by calcination-acid leaching-chemical precipitation process. Calcining temperature was determined according to the properties of thermogravimetry of the electrode materials. The effect on the leaching and precipitation of cobalt by different factors were investigated. The acid leaching process was optimized by response surface analysis, and the acid leaching solution was treated and recycled to avoid secondary pollution. The experimental results demonstrated that the binder could be fully removed when the calcining temperature was 500 ℃. The optimum conditions for the leaching of cobalt were 6.15 mL·g-1 of liquid-solid ratio, 96.34 ℃ of leaching temperature, 44.52 min of leaching time, and 1.20 mol·L-1 H2SO4, respectively. Under the optimum condition, cobalt leaching efficiency was up to 97.51%. The optimal precipitation pH, [C2O42-]/[Co2+], temperature and time were 1.5, 1.10, 70 ℃ and 50 min, respectively. The precipitation efficiency of cobalt was up to 95.69% under the optimum condition. The XRD and SEM analyzed results show that the CoC2O4 which was obtained as products of the recycling has high purity and preferable crystal structure.
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  • 刊出日期:  2018-09-20

废旧锂离子电池中钴的回收

  • 1. 广西大学资源环境与材料学院，南宁 530004
  • 2. 广西贵港北控水务环保有限公司，贵港 537000
基金项目:

国家自然科学基金资助项目(21767003)

广西自然科学基金资助项目（2015GXNSFAA139232)

南宁市科学研究与技术开发项目（20160537）

摘要: 采用高温煅烧-酸浸-化学沉淀工艺回收废旧锂离子电池中的钴，根据电极材料的热重性质确定煅烧温度，探究不同因素对钴的浸出和沉淀效果的影响，利用响应面技术优化酸浸过程，并对酸浸液进行回收处理。实验结果表明：煅烧温度为500 ℃时可充分去除黏结剂；优化实验得出H2SO4+H2O2体系浸出钴的最佳实验条件为液固比（mL ：g）6.15，浸出温度96.34 ℃，浸出时间44.52 min，H2SO4浓度1.20 mol·L-1，浸出率97.51%；当浸出液pH为1.5，[C2O42-]/[Co2+]比值为1.10，反应温度为70 ℃，沉淀时间为50 min时，钴的沉淀率为95.69%。回收得到的CoC2O4纯度高，晶体结构较好。

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