摘要
将废锂电池正极用酸溶解,再分别采用分步沉淀法和吸附沉淀法去除废锂电池液中的Fe3+,Al3+,Ca2+,Mg2+,抽滤后得到含CoSO4的滤液;用NaHCO3作沉淀剂,对CoSO4滤液进行沉淀反应,将得到的沉淀物过滤、洗涤、干燥后得CoCO3粉末;将CoCO3粉末进行煅烧后得Co3O4粉末。实验得出的制备CoCO3粉末的最佳工艺条件:反应温度50℃,用NaHCO3作沉淀剂;制备Co3O4粉末的最佳工艺条件:煅烧温度600℃,煅烧时间大于4h。在该条件下得到的Co3O4粉末符合锂电池生产的要求。
The positive electrodes of used batteries Mg^2＋ in the solution were removed by fractional were dissolved in acid and Fe^3＋, Al^3＋, Ca^2＋, precipitation and adsorption precipitation. After pumping filtration, the filtrate containing CoSO4 was obtained and then precipitated using NaHCO3 as precipitant. The powder CoCO3 was got after the precipitate had been treated by filtration, washing and drying. Finally, the powder Co3O4 was gained by calcination. The optimum process conditions are as follows： reaction temperature 50 ℃ and using NaHCO3 as precipitant for powder CoCO3 production; calcination temperature 600℃ and calcination time more than 4 h for powder Co3O4 production. The powder Co3O4 product prepared under these conditions can meet the requirements for lithium battery production.
出处
《化工环保》
CAS
CSCD
北大核心
2007年第5期468-472,共5页
Environmental Protection of Chemical Industry
关键词
锂电池
碳酸钴
四氧化三钴
综合利用
lithium battery
cobalt carbonate
cobaltosic oxide
comprehensive utilization
作者简介
张灏（1978-），男，北京市人，硕士，主要研究方向为废锂电池的回收与再利用。
[通讯联系人]金鑫，电话：13240202406；电邮：jinxin@mail．buct．edu．cn。
