刘子帅,张一敏,戴子林,刘聪.N235萃取法从钒钛磁铁矿沉钒废水中回收钒[J].有色金属(冶炼部分),2019(11):87-92.
N235萃取法从钒钛磁铁矿沉钒废水中回收钒
Recovery of Vanadium from Vanadium-Bearing Wastewater of Vanadium-Titanium Magnetite with Solvent Extraction by N235
投稿时间:2019-07-01  修订日期:2019-07-03
DOI:doi:10.3969/j.issn.1007-7545.2019.11.018
中文关键词:  N235  溶剂萃取  钒钛磁铁矿  沉钒废水  回收
英文关键词:N235  solvent extraction  vanadium-titanium magnetite  vanadium-bearing wastewater  recovery
基金项目:国家自然科学基金资助项目(51774215);湖北省自然科学基金杰出青年项目(2018CFA068)
           
作者单位
刘子帅 武汉科技大学资源与环境工程学院
张一敏 武汉科技大学资源与环境工程学院
戴子林 广东省稀有金属研究所
刘聪 武汉科技大学资源与环境工程学院
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中文摘要:
      针对某钒钛磁铁矿沉钒废水中的钒被石灰直接中和导致钒资源被浪费等问题,研究了以N235萃取法从钒钛磁铁矿沉钒废水中回收钒,考察了萃取剂浓度、相比、初始pH以及反萃剂浓度等对钒萃取及反萃的影响。结果表明:沉钒废水经四级逆流萃取、五级逆流反萃,可获得钒浓度为28.83 g/L的富钒液,经水解沉钒、煅烧,可获得YB/T 5304—2017冶金98级V2O5产品,钒总回收率为96.97%。生产中可将钒浓度相近的富钒液与酸浸液合并水解沉钒,从而实现了钒金属的闭路循环,提高钒的总回收率。
英文摘要:
      To address waste of vanadium resources in wastewater from vanadium-titanium magnetite during direct neutralization with lime, recovery of vanadium from vanadium-bearing wastewater of vanadium-titanium magnetite with solvent extraction by N235 was studied. Effects of extractant concentration, phase ratio, initial pH value and stripping agent concentration on vanadium extraction and stripping were investigated. The results show that vanadium-rich solution with 28.83 g/L vanadium concentration is obtained by four-stage countercurrent extraction and five-stage countercurrent stripping. After hydrolysis-precipitation and calcination, YB/T 5304—2017 Metallurgical Grade 98 V2O5 product can be obtained. Total recovery of vanadium is 96.97%. In production, vanadium-rich solution with similar vanadium concentration can be combined with acid leaching solution to hydrolyze and precipitate vanadium, thus realizing closed-circuit cycle of vanadium metal and improving total recovery of vanadium.
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