화학공학소재연구정보센터
Journal of the Electrochemical Society, Vol.166, No.8, F226-F230, 2019
Improved USTB Titanium Production with a Ti2CO Anode Formed by Casting
Electrochemical extraction of titanium using a consumable anode of TiCxOy solid solution has been considered as a low-cost and environmentally friendly method. This method is normally referred to as the USTB process when using TiO2 as the starting material, or as the Chinuka process when using titanium ores as raw materials. However, scaling-up of this process is limited by anode preparation and slow electrochemical dissolution. Here, an arc furnace was used to prepare a Ti2CO solid solution that was cast to form a consumable anode for the electrochemical preparation of metallic titanium in a NaCl-KCl molten salt without low-valance titanium ions. The dissolution potential of the as-prepared Ti2CO solid solution is more negative than that of conventional powder sintering. A constant-current electrolysis was carried out in a NaCl-KCl molten salt at 1023 K. The results indicate that titanium ions were stably dissolved from Ti2CO anode into melts, and then metallic titanium was deposited on the cathode. It was confirmed that the cast Ti2CO solution was a promising consumable anode for the USTB process for stable and effective preparation of metallic titanium. (C) 2019 The Electrochemical Society.