Selective extraction of titanium from Ti-bearing slag via the enhanced depolarization effect of liquid copper cathode

作     者：Zhenghao Pu Handong Jiao Zhishan Mi Mingyong Wang Shuqiang Jiao Zhenghao Pu;Handong Jiao;Zhishan Mi;Mingyong Wang;Shuqiang Jiao

作者机构：State Key Laboratory of Advanced MetallurgyUniversity of Science and Technology BeijingBeijing 100083China Beijing Advanced Innovation Center for Materials Genome EngineeringCorrosion and Protection CenterUniversity of Science and Technology BeijingBeijing 100083China 

出 版 物：《Journal of Energy Chemistry》 (能源化学（英文版）)

年 卷 期：2020年第29卷第3期

页      面：43-48页

核心收录：

学科分类：083002[工学-环境工程] 0830[工学-环境科学与工程（可授工学、理学、农学学位）] 080603[工学-有色金属冶金] 08[工学] 0806[工学-冶金工程] 

基　　金：supported by the National Natural Science Foundation of China(51725401) the Fundamental Research Funds for the Central Universities(FRF-TP-18-010B1) 

主　　题：Titanium alloys Molten oxides electrolysis Liquid cathode Selective depolarization 

摘      要：Ti-bearing slag(TiO220 wt%)is a valuable titanium secondary *** extraction of titanium from the slag is difficult due to the complex composition and *** molten oxide electrolysis is considered as a promising method,silicon will be preferentially electroreduced compared to titanium due to low theoretical decomposition *** this work,a liquid copper cathode is used to selectively extract titanium from molten Al2O3-MgO-CaO-TiO2-SiO2 *** is found that comparing to silicon,titanium can be preferentially reduced by one-step electron transfer due to the enhanced depolarization effect on a liquid copper ***,Ti-Cu alloys are firstly obtained from molten Ti-bearing slag,and then Ti-Si alloys are co-electrodeposited in the molten oxide electrolyte with low TiO2 *** may be ascribed to the larger binding force between titanium and copper than that between silicon and *** provides an effective strategy for the separation of titanium from of Ti-bearing slag.