摘要
研究三元电池正极材料制程过程中产生的废水资源化回用工艺。主要采用陶瓷微滤方式对Ni2+、Co2+、Mn2+金属氧化颗粒物进行回收利用,采用高压反渗透膜对废水进行浓缩预处理,通过浓缩,提高废水中Li+的浓度,浓缩倍数越高,越更有利于沉锂反应的进行。在反应釜中进行沉锂反应,加入碳酸钠粉末,根据碳酸锂溶解度随温度变化曲线规律,反应釜通过蒸汽加热,反应时间30min,可得到纯度为电池级的碳酸锂,浓水进蒸发系统进行处理。
In this paper,the recycling technology of effluent produced in the process of making cathode material for ternary batteries was studied.Ni2+,Co2+and Mn2+metal oxide particles were recycled by ceramic microfiltration.High pressure reverse osmosis membrane was used to concentrate and pretreat the effluent.The concentration of Li+in the effluent was increased by means of concentration.The higher the concentration multiple was,the more beneficial to the lithium precipitation reaction.Lithium precipitation reaction was conducted in the reaction kettle with the addition of sodium carbonate powder.According to the law of the solubility curve of lithium carbonate changing with temperature[1],Lithium carbonate of battery grade purity can be obtained through steam heating in the reaction kettle and the reaction time was 30 minutes.The concentrated water was treated by the evaporation system.
作者
吴晓伟
秦佩
WU Xiaowei;QIN Pei(Hefei Hengli Equipment Co.,Ltd,Anhui 230022,China)
出处
《电子技术（上海）》
2020年第2期165-167,共3页
Electronic Technology
基金
安徽省中小企业科技创新课题项目。
关键词
控制技术
三元正极材料
碳酸锂
镍钴锰
资源化回用
control technology
ternary cathode materials
lithium carbonate
NCM
resourcelization recycle
