2024年第2期doi:10.3969/j.issn.1007-7545.2024.02.012有色金属(治炼部分)(http://ysyl.bgrimm.cn)放射性锯铁精矿中铀针的脱除及分离柯平超1,2,王坤坤²,钟婷婷²,周义朋1,马晓磊3,万凌云4,徐玲玲1.2,王健,黎广荣1(1.东华理工大学核资源与环境国家重点实验室,南昌330013;2.东华理工大学水资源与环境工程学院,南昌330013;3.阿克陶科邦锰业制造有限公司,新疆阿克陶845550;4.新疆有色金属研究所,乌鲁木齐830022)摘要:通过对国内某企业进口放射性锯铁精矿进行工艺矿物学分析,确定该精矿的主要矿相为烧绿石,同时伴生钛铁矿和白云母,矿石中放射性元素U和Th的含量分别为0.27%和1.03%。针对该锯铁精矿,探索H,SO,-Fe(II)、H,SOr-HF-H,O2、H,SOr-HF、H,SO,-HF-H,O2-(NH,)2CO:体系中U和Th的浸出及分离效果,最终确定H,SO4-HF-H²O2-(NH)2COs多段浸出工艺能有效实现U和Th的脱除与分离。U、Th的脱除率分别为100%和80%。基于研究提出了锯铁精矿U、Th脱除及分离工艺流程。关键词:锯铁精矿;铀;针;多段浸出中图分类号:TL212.1+2;TF841.6RemovalandSeparationofUraniumandThoriumfrom文献标志码:ARadioactiveNb-FeConcentrate文章编号:1007-7545(2024)02-0083-09KEPingchaol-’,WANGKunkun’,ZHONGTingting",ZHOUYipeng',MAXiaolei',WANLingyun',XULingling'",WANGJian',LIGuangrong'(1.StateKeyLaboratoryofNuclearResourcesandEnvironment,EastChinaUniversityofTechnology,Nanchang330013,China;2.SchoolofWaterResourcesandEnvironmentalEngineering,EastChinaUniversityofTechnology,Nanchang330013,China;3.AketaoKebangManganeseManufacturingCo.,Ltd.,Aketao845550,Xinjiang,China;4.XinjiangNonferrousMetalsResearchInstitute,Urumqi830022,China)Abstract:ThroughtheprocessmineralogyanalysisoftheradioactiveNb-Feconcentrateimportedbyadomesticenterprise,themainmineralphaseoftheconcentrateispyrochlore,associatedwithilmeniteandmuscovite.ThecontentsofradioactiveelementsUandThintheoreare0.27%and1.03%respectively.ForthisNb-Feconcentrate,theleachingandseparationeffectsofUandThinH,SO4-Fe(II),H,SO4-HF,H,SOf-HF-H,O2,andH,SOf-HF-H,O2-(NH,),CO:systemswereexplored.Finally,itisdeterminedthatH,SO4-HF-H,O2-(NH)2CO;multi-stageleachingprocesscaneffectivelyremoveandseparateUandTh.Theremovale...