钛白粉副产硫酸亚铁的除杂工艺研究
Study on impurity removal technology of ferrous sulfate by-product from titanium dioxide production
王君婷 1查坐统 1张振环 2彭操 3顾小玉 3万邦隆 1马航3
作者信息
- 1. 云南云天化股份有限公司研发中心,云南 昆明 650228;西安交通大学能源与动力工程学院,陕西西安 710000
- 2. 云南云天化股份有限公司研发中心,云南 昆明 650228;云南大学国际河流与生态安全研究院,云南 昆明 650504
- 3. 云南云天化股份有限公司研发中心,云南 昆明 650228
- 折叠
摘要
硫酸亚铁作为正极材料前驱体磷酸铁的制备原料受到广泛关注.钛白粉副产硫酸亚铁中金属杂质含量过多无法直接应用于电池材料的制备,需通过除杂工艺以降低杂质含量.笔者针对目前已有的除杂工艺(水解法、化学沉淀法、结晶法)进行实验验证及优化,并优选出水解法与结晶法相结合的除杂方法,可使溶液中的p(Mg)小于500mg/L、p(Mn)小于80mg/L,其他杂质指标均合格,可直接用于电池级磷酸铁的制备.
Abstract
Ferrous sulfate as a raw material for the preparation of precursor iron phosphate for positive electrode material has been widely concerned.The metal impurity content of ferrous sulfate by-product from titanium dioxide production is too much to be directly applied to the preparation of battery materials,and the impurity content shall be reduced.The experimental verification and optimization for the existing impurity removal processes(hydrolysis method,chemical precipitation method,crystallization method)are carried out,and the impurity removal method combined with hydrolysis method and crystallization method is preferred,which can make the p(Mg)in the solution less than 500 mg/L,p(Mn)less than 80 mg/L,and other impurities are qualified,and the ferrous sulfate product can be directly used for the preparation of battery-grade iron phosphate.
关键词
硫酸亚铁/磷酸铁/除杂工艺/水解/结晶Key words
ferrous sulfate/iron phosphate/impurity removal process/hydrolysis/crystallization引用本文复制引用
出版年
2024
NETL
NSTL
万方数据