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

作　　者：刘子帅 张一敏[1,2,3,4] 戴子林 刘聪[1,2,3,4] LIU Zi-shuai;ZHANG Yi-min;DAI Zi-lin;LIU Cong(School of Resource and Environmental Engineering,Wuhan University of Science and Technology,Wuhan 430081,China;State Environmental Protection Key Laboratory of Mineral Metallurgical Resources Utilization and Pollution Control,Wuhan University of Science and Technology,Wuhan 430081,China;Hubei Collaborative Innovation Center for High Efficient Utilization of Vanadium Resources,Wuhan University of Science and Technology,Wuhan 430081,China;Hubei Provincial Engineering Technology Research Center of High efficient Cleaning Utilization for Shale Vanadium Resource,Wuhan University of Science and Technology,Wuhan 430081,China;Guangdong Research Institute of Rare-Metal,Guangzhou 510650,China)

机构地区：[1]武汉科技大学资源与环境工程学院,武汉430081 [2]武汉科技大学国家环境保护矿冶资源利用与污染控制重点实验室,武汉430081 [3]武汉科技大学钒资源高效利用湖北省协同创新中心,武汉430081 [4]武汉科技大学湖北省页岩钒资源高效清洁利用工程技术研究中心,武汉430081 [5]广东省稀有金属研究所,广州510650

出　　处：《有色金属（冶炼部分）》2019年第11期87-92,共6页Nonferrous Metals（Extractive Metallurgy)

基　　金：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）

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28.83g/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。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 vanadiumtitanium 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 hydrolysisprecipitation 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.

关 键 词：N235 溶剂萃取 钒钛磁铁矿 沉钒废水 回收 

分 类 号：TF841.3[冶金工程—有色金属冶金]