许万祥,高凯,郭瑞,李进,周严,张卜升.富集渣中铪的TBP萃取分离研究[J].有色金属(冶炼部分),2019(4):34-38.
富集渣中铪的TBP萃取分离研究
Study on Separation of Hafnium from Enriched Slag with TBP Extraction
投稿时间:2018-12-11  修订日期:2018-12-17
DOI:doi:10.3969/j.issn.1007-7545.2019.04.008
中文关键词:  铪钛富集渣  TBP  萃取  洗涤
英文关键词:hafnium & titanium enriched slag  TBP  extraction  washing
基金项目:国家重点研发计划(2018YFC1901704)
                 
作者单位
许万祥 西安瑞鑫科金属材料有限责任公司
高凯 西安瑞鑫科金属材料有限责任公司
郭瑞 西安瑞鑫科金属材料有限责任公司
李进 西北有色研究院
周严 西安瑞鑫科金属材料有限责任公司
张卜升 西北有色研究院
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中文摘要:
      以铪钛富集渣为原料,经硝酸溶解后采用TBP进行铪的萃取分离试验,主要考察铪钛质量浓度、有机相初始酸度、萃取时间、水相初始酸度、相比等对铪钛分离的影响,同时进行了不同浓度硝酸洗涤试验,以萃取和洗涤得到数据为基础进行了分馏萃取理论级数的计算。结果表明,最优萃取条件为:铪钛总质量浓度2.8 g/L、有机相初始酸度3.1 mol/L、萃取时间6 min、水相初始酸度6.5 mol/L、相比1︰1,铪、钛萃取率分别为84.8%和5.1%,铪、钛分配比分别为5.6和0.054,萃取分离系数βHf/Ti=104。选用10 mol/L硝酸洗涤TBP载铪有机相,得到洗涤β""Hf/Ti=105,基本与βHf/Ti保持一致,经计算分馏萃取分离铪钛需要萃取级数3级,洗涤级数4级。
英文摘要:
      Separation test of Hf by extraction with TBP from nitric acid dissolved Hf & Ti enriched slag was conducted. Effects of Hf & Ti mass concentration, initial acidity of organic phase, extraction time, initial acidity of water phase, and phase ratio of organic phase to aqueous (O/A) on separation of Hf and Ti were investigated. Washing tests with different concentration of nitric acid were carried out. Theory stage of fractional extraction was calculated based on data of extraction and washing. The results show that extraction rate of Hf and Ti is 84.8% and 5.1% respectively, distribution ratio of Hf and Ti is 5.6 and 0.054, and extraction separation coefficient βHf/Ti is 104 under the optimum conditions including total mass concentration of Hf & Ti of 2.8 g/L, initial acidity of organic phase of 3.1 mol/L, extraction time of 6 min, initial acidity of water phase of 6.5 mol/L, and O/A=1/1. Washing separation coefficient β""Hf/Ti of TBP organic phase loaded with Hf with 10 mol/L nitric acid is 105, which is basically consistent with βHf/Ti. Extraction stage is three and washing stage is four to separate Hf and Ti by fractionation extraction after calculation.
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