Highly selective and green recovery of lithium ions from lithium iron phosphate powders with ozone

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Update time : 2025-07-03

臭氧从磷酸铁锂粉末中高选择性绿色回收锂离子

Highly selective and green recovery of lithium ions from lithium iron phosphate powders with ozone

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摘要:由于磷酸铁锂正极材料不含锂以外的高价值金属,因此在废旧磷酸铁锂正极材料的回收利用中,需要在回收效率和经济效益之间取得平衡。在这里,我们描述了一种选择性回收工艺,可以实现经济高效的回收和可接受的锂浸出率。通过调节酸浓度和氧化剂的用量,可以实现锂离子的选择性回收。铁以磷酸铁的形式保留在浸出渣中,易于回收利用。全面探讨了酸浓度、酸用量、氧化剂用量、反应温度等因素对锂、铁浸出的影响,明确了选择性浸出的机理。这种工艺大大降低了加工设备和化学品的成本。这增加了该工艺的潜在工业用途,并使未来废旧磷酸铁锂正极材料的绿色高效回收成为可能。


2.1材料

主要元素含量(38.05wt%Fe和4.66wt%Li)的LFP粉末购自有限公司华为瑞科化工有限公司。HCl(36-38重量%)、NaOH和Na2CO3购自北京化工厂(中国北京)。使用有限公司通林科技有限公司提供的3S-T10臭氧发生器(中国北京)从纯氧中生产所需浓度的臭氧。

2.2锂的选择性浸出

将粉末和HCl(共8g)放入250mL三颈烧瓶中,并向溶液中加入臭氧。

以氧气为气源,通过调节臭氧发生器的功率来调节输出臭氧浓度,并由臭氧浓度分析仪(3S-J5000)进行监测。臭氧通过钛合金曝气头(孔径1-2μm)与浸出液充分接触,反应过程中的温度由循环水机(SHBIII)控制。反应在20°C下进行60分钟。


The ozone equipment models used in this experiment are: 3S-T10 ozone generator and 3S-J5000 ozone detector.


摘自:Highly selective and green recovery of lithium ions from lithium iron phosphate powders with ozone

Research Article

Published: 05 March 2023

Volume 17, pages 749–758, (2023)


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