Microemulsion leaching of vanadium from sodium-roasted vanadium slag by fusion of leaching and extraction processes  

作　　者：Yun Guo Hong-yi Li Yi-heng Yuan Jie Huang Jiang Diao Gang Li Bing Xie 

机构地区：[1]College of Materials Science and Engineering,Chongqing University,Chongqing 400044,China [2]Chongqing Key Laboratory of Vanadium-Titanium Metallurgy and New Materials,Chongqing University,Chongqing 400044,China

出　　处：《International Journal of Minerals,Metallurgy and Materials》2021年第6期974-980,共7页矿物冶金与材料学报（英文版）

基　　金：This work was financially supported by the National Natural Science Foundation of China(Nos.51474041 and 51674051);Chongqing Science and Technology Bureau(No.cstc2019jcyjjqX0006);Chongqing Talents Plan for Young Talents(No.CQYC201905050).

摘　　要：The fusion of the leaching and purification processes was realized by directly using microemulsion as the leaching agent.The bis-(2-ethyhexyl)phosphoric acid(DEHPA)/n-heptane/NaOH microemulsion system was established to directly leach vanadates from sodium-roasted vanadium slag.The effect of the leaching agent on the leaching efficiency was investigated,in addition to the molar ratio of H_(2)O/NaDEHP(W),DEHPA concentration,solid/liquid ratio,stirring time,and leaching temperature.In optimal situations,the vanadium leaching efficiency reaches 79.57%.The X-ray diffraction characterization of the leaching residue and the Raman spectrum of the microemulsion before and after leaching demonstrate the successful entry of vanadates from the sodium-roasted vanadium slag into the microemulsion.The proposed method successfully realizes the leaching and purification of vanadates in one step,thereby greatly reducing production costs and environmental pollution.It also offers a new way to achieve the green recovery of valuable metals from solid resources.

关 键 词：vanadium slag sodium roasting clinker microemulsion leaching extraction 

分 类 号：TF841.3[冶金工程—有色金属冶金]