有色金属科学与工程2024，Vol.15Issue(6)：831-840,10.DOI:10.13264/j.cnki.ysjskx.2024.06.006
钕铁硼二次废料酸浸-萃取法制备FeCl3·6H2O
Preparation of FeCl3·6H2O from NdFeB secondary waste slag by acid leaching-extraction method
摘要
Abstract
For the recovery of large amounts of iron in NdFeB secondary waste slag,an acid leaching-extraction process was employed to prepare FeCl3·6H2O.Single factor experiments,thermodynamic and kinetic research were used to optimize the acid leaching conditions,achieving a leaching rate of Fe3+exceeding 91%.A systematic study was conducted on the selective extraction performance of the LIU extractant towards Fe3+in the hydrochloric acid wet leaching processing.After the three-stage cross-current extraction,the extraction rate of Fe3+reached 98.78%,while other impurity ions were basically not extracted and retained in the raffinate.Distilled water was used for stripping.The stripping rate of Fe3+reached 99.88%after the two-stage cross-current stripping.The products were characterized by ICP-OES,XRD,and SEM.The results showed that the product purity was over 99.8%,and the net profit exceeded 1 200 CNY/ton.Compared with other recycling processes,this technology forms a closed cycle with low costs and short duration,thereby providing an effective scheme for the treatment of secondary waste.关键词
钕铁硼废料/氯化铁/热力学分析/缩核模型/酸浸/萃取Key words
NdFeB waste/FeCl3/thermodynamics analysis/shrinking core model/acid leaching/extraction分类
矿业与冶金引用本文复制引用
刘艳红,张灿文,熊道陵,欧阳少波,张元波,阳金娟,李檬,卢雄雄..钕铁硼二次废料酸浸-萃取法制备FeCl3·6H2O[J].有色金属科学与工程,2024,15(6):831-840,10.基金项目
江西省自然科学基金资助项目(2020BAB203020,2020BAB214021) （2020BAB203020,2020BAB214021）
江西省吉安市重大科技专项项目(市财教指[2019]55号) （市财教指[2019]55号）
江西省教育厅科学技术研究资助项目(GJJ200809) （GJJ200809）
