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投稿时间：2020-09-15 修订日期：2020-09-22 录用日期：2020-09-24 网络发布日期：2020-12-03
投稿时间：2020-09-15 修订日期：2020-09-22 录用日期：2020-09-24 网络发布日期：2020-12-03
中文摘要: 针对含氟/磷杂质组分的三元正极废粉和纯三元正极粉开展还原焙烧—水浸试验，发现相同试验条件下，含杂三元正极废粉锂的浸出率明显低于纯三元正极粉，氟/磷杂质组分是影响还原焙烧—水浸提锂效果的关键因素，还原焙烧过程中，由于氟/磷的影响，正极材料中的锂部分转化为不溶于水的LiF和Li3PO4，进而损失于水浸渣中。
Abstract:Spent NCM cathode powder with/without fluorine and phosphorus impurities were treated by reduction roasting-water leaching. The results show that lithium leaching efficiency in spent NCM cathode powder containing fluorine and phosphorus impurities was significantly lower than that of pure NCM cathode powder under same experimental conditions. Fluorine and phosphorus impurities are the key factors affecting lithium recovery during reduction roasting-water leaching, which can be explained by that parts of lithium in NCM cathode powder is converted into insoluble LiF and Li3PO4 during reduction roasting process.
keywords: spent lithium-ion battery NCM cathode powder reduction roasting lithium phosphorus fluorine
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基金项目:长沙市科技支撑计划项目（kq1602212）；中央企业电动车产业联盟共性技术项目（JS-211）
引用文本：
廖财斌,任国兴,肖松文.三元正极废粉还原焙烧—水浸提锂过程氟磷杂质的影响[J].有色金属（冶炼部分）,2020(12):42-47.
Liao Caibin,Ren Guo-xing,Xiao Song-wen.Effect of Fluorine and Phosphorus Impurity on Recovery of Lithium from Spent NCM Cathode Powder by Reduction Roasting-Water Leaching Process[J].Nonferrous Metals (Extractive Metallurgy),2020(12):42-47.
廖财斌,任国兴,肖松文.三元正极废粉还原焙烧—水浸提锂过程氟磷杂质的影响[J].有色金属（冶炼部分）,2020(12):42-47.
Liao Caibin,Ren Guo-xing,Xiao Song-wen.Effect of Fluorine and Phosphorus Impurity on Recovery of Lithium from Spent NCM Cathode Powder by Reduction Roasting-Water Leaching Process[J].Nonferrous Metals (Extractive Metallurgy),2020(12):42-47.
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