Direct electrochemical extraction of TisSia from pressed cathode pellets comprising of powdered Ti/Si- containing metal oxide compounds was investigated by using molten salt electro-deoxidation technology. Three group...Direct electrochemical extraction of TisSia from pressed cathode pellets comprising of powdered Ti/Si- containing metal oxide compounds was investigated by using molten salt electro-deoxidation technology. Three groups of mixtures including TiO2 mixed with SiO2, Ti-bearing blast furnace slag （TBFS） mixed with TiO2, and TBFS mixed with high-titanium slag （HTS） were prepared at the same stoichiometric ratio （Ti ： Si = 5 ： 3） corresponding to the target composition of Ti5Si3, and used as the starting materials in this experiment, respec- tively. The pressed porous cylindrical pellet of the Ti/Si-contalning compounds served as a cathode, and two different anode systems, i.e., the inert solid oxide oxygen-ion-conducting membrane （SOM） based anode system and graphite-based anode system were used contrastively. The electrochemical experiment was carried out at 900--1050℃ and 3.0--4.0V in molten CaCl2 electrolyte. The results show that the oxide components were electro-deoxidized effectively and Ti5Si3 could be directly extracted from these complex Ti/Si-containing metal oxide compounds.展开更多
基金the National Natural Science Foundation of China(No.51074105)the China Postdoctoral Science Foundation(No.2012M520873)China National Funds for Distinguished Young Scientists (No.51225401)
文摘Direct electrochemical extraction of TisSia from pressed cathode pellets comprising of powdered Ti/Si- containing metal oxide compounds was investigated by using molten salt electro-deoxidation technology. Three groups of mixtures including TiO2 mixed with SiO2, Ti-bearing blast furnace slag （TBFS） mixed with TiO2, and TBFS mixed with high-titanium slag （HTS） were prepared at the same stoichiometric ratio （Ti ： Si = 5 ： 3） corresponding to the target composition of Ti5Si3, and used as the starting materials in this experiment, respec- tively. The pressed porous cylindrical pellet of the Ti/Si-contalning compounds served as a cathode, and two different anode systems, i.e., the inert solid oxide oxygen-ion-conducting membrane （SOM） based anode system and graphite-based anode system were used contrastively. The electrochemical experiment was carried out at 900--1050℃ and 3.0--4.0V in molten CaCl2 electrolyte. The results show that the oxide components were electro-deoxidized effectively and Ti5Si3 could be directly extracted from these complex Ti/Si-containing metal oxide compounds.
