Preparation of ferrotitanium alloy by molten salt electrolysisfrom waste residue containing titanium
LU Hong-peng1,2, CHEN Chao-yi1,2, WANG Bo1,2, LIU Jiang1,2, XIANG Ming-liang1,2, YUAN Zai-yan1,2
1. College of Materials and Metallurgy, Guizhou University, Guiyang 550025, Guizhou, China; 2. Guizhou Province Key Laboratory of Metallurgical Engineering and Process Energy Saving, Guiyang 550025, Guizhou, China
Abstract：Ferrotitanium alloy was prepared by molten salt electrolysis in CaCl2 molten salt electrolyte at 900 ℃ and 3.1 V using nickel foam wrapped titanium slag and Fe2O3 mixture as cathode and carbon rod as anode. The influence of cathode forming pressure on the microstructure and electrolysis effect was investigated. The results showed that the porosity of the sintered cathode decreased with the increase of the molding pressure. When the molding pressure was 2 MPa, the porosity of the sintered cathode was 39.5%, and the cathode sheet had good electrochemical activity. The electrolytic products had uniform particle size, low oxygen content and obvious sponge state, which were mainly FeTi and a small amount of Fe2Ti. With the increase of molding pressure, the electrolytic products became dense gradually, the three-phase interface of the deoxidization reaction was reduced, and the oxygen ion migration in the cathode was blocked, resulting in the deterioration of the electro-deoxidation effect and the appearance of TiO in the products. The current decreased rapidly at the beginning of electrolysis, then tended to be flat after 20 min and increased after 150 min.
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2021, Vol. 31 
