周有池,文小强,郭春平,刘雯雯.铁锂废料回收制备电池级碳酸锂和磷酸铁工艺研究[J].有色金属(冶炼部分),2019(4):73-77.
铁锂废料回收制备电池级碳酸锂和磷酸铁工艺研究
Study on Preparation of Battery Grade Lithium Carbonate and Iron Phosphate from Iron Lithium Waste Recycling
投稿时间:2018-12-24  修订日期:2018-12-26
DOI:doi:10.3969/j.issn.1007-7545.2019.04.017
中文关键词:  铁锂废料  选择性  回收  Li2CO3  FePO4•2H2O
英文关键词:iron-lithium scrap  selective  recycling  Li2CO3  FePO4•2H2O
基金项目:赣州市科技计划项目(赣市科发[2018]50号);江钨控股集团科研项目(JW-17B-19,JW-18B-13)
           
作者单位
周有池 赣州有色研究研究所
文小强 赣州有色研究研究所
郭春平 赣州有色研究研究所
刘雯雯 赣州有色研究研究所
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中文摘要:
      采用HCl+H2O2体系对铁锂废料选择性提锂,浸出液除杂沉Li2CO3;浸出渣盐酸酸溶后,采用Na2CO3控制pH制备FePO4?2H2O。主要研究盐酸用量、H2O2用量和液固比对锂浸出率的影响;反应pH、反应温度、反应物Fe/P比对FePO4?2H2O产品质量的影响。两工序后液混合可获得Li3PO4副产物。工艺中无铁的废渣产生,锂收率达到97%,铁收率达到98%。
英文摘要:
      Lithium was selectively extracted from iron-lithium waste with HCl+H2O2. Li2CO3 was precipitated from leachate after purification. Leaching residue was dissolved by HCl to prepare FePO4?2H2O under controlled pH value with Na2CO3. Effects of HCl dosage, H2O2 dosage and ratio of liquid to solid on Li leaching rate were investigated. Effects of reaction pH value, reaction temperature and Fe/P ratio of reactant on product quality of FePO4?2H2O were studied. Li3PO4 was obtained by mixing solution of two procedures. Li yield rate is 97%. Fe yield rate is 98% without generation of Fe-bearing residue.
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