王凯,侯晓静,何朝军,吴可君,何潮洪

• 1:浙江省化工高效制造技术重点实验室
• 2:浙江大学化学工程与生物工程学院
• 3:浙江大学衢州研究院
• 4:杭州启臻科技有限公司

摘要(Abstract)：

为实现废旧磷酸铁锂(LFP)电池正极粉的高效低成本回收，通过盐浸-氧化循环工艺，回收废旧LFP正极粉。以FeCl_3为浸出剂，通过H_2O_2氧化使浸出液中的FeCl_2变回FeCl_3，实现浸出剂的再生。在优化条件下，第1次浸出的Li浸出率可达99.56%，再生循环10次后仍保持97.37%的浸出率。浸出后的残渣是FePO_4粗品。最终的浸出液通过KOH沉淀法除去其中的Fe~(2+)、Fe~(3+)和Al~(3+)可得到较纯净的LiCl溶液，Li~+浓度可达4 mol·L~(-1)。经过对盐浸-氧化循环、酸浸选择性提锂和盐浸-萃取耦合3种方法的经济性估算，发现盐浸-氧化循环工艺的耗水量更低、成本更低，具有较好的工业化应用前景。

关键词(KeyWords)： 磷酸铁锂;浸出;氧化循环;浸出剂再生;经济性分析

Abstract:

Keywords:

基金项目(Foundation):

作者(Author): 王凯,侯晓静,何朝军,吴可君,何潮洪

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