摘要
采用超声辅助酸浸回收废旧锂离子电池正极材料 LiCoO2 中的 Co,实现有价金属的高效浸出.研究超声功率等浸出条件对 Co的浸出效率的影响并用响应面分析法探究浸出条件因素的交互作用,实现浸出反应过程优化.实验结果表明,在反应温度为 60℃,反应时间为 60 min,超声功率为 250 W 的条件下,Co的浸出率为 97.31%;反应时间,反应温度和超声功率三个实验因素对反应过程的影响程度顺序依次为反应温度＞反应时间＞超声功率;反应温度和反应时间的交互作用在 Co的浸出过程中最为显著,反应温度和超声功率之间的交互作用次之,超声功率和反应时间之间的交互作用最弱.
Abstract
Ultrasound-assisted recovery of a valuable metal Co from waste lithium-ion battery cathode material is used to achieve ef-ficient leaching of valuable metals.The degree of influence of leaching conditions such as ultrasonic power on the leaching effi-ciency of Co in LiCoO2 and the interaction between reaction conditions were studied.The experimental results show that the leach-ing rate of Co is 97.31%under the conditions of reaction temperature of 60℃,reaction time of 60 min and ultrasonic power of 250 W.The order of the influence of three experimental factors on the reaction process is reaction temperature>reaction time>ultra-sonic power;the interaction between reaction temperature and reaction time is most obvious in the leaching process of Co,the inter-action between reaction temperature and ultrasonic power is more obvious,and the interaction between ultrasonic power and reaction time is the weakest.
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