Effective Deoxidation Process of Titanium Scrap Using MgCl2 Molten Salt Electrolytic

Metals

Soong Ju Oh¹  Sang-hoon Choi²  Hyun Chul Kim³  Kyoung-Tae Park³  Namhun Kwon³  Sung Gue Heo³  Jong-Soo Byeon³  Seok-Jun Seo³ 

[1] Department of Materials Science and Engineering, Korea University, Seoul 02841, Korea;Institute for Advanced Engineering, Yong-in 17180, Korea;Korea Institute of Industrial Technology, Incheon 21999, Korea;

关键词: titanium;    deoxidation;    electrolytic refining;    recycling;    rare-earth;   

DOI  :  10.3390/met11121981

来源: DOAJ

【 摘 要 】

To overcome the scarcity and resource limitations of Ti metal, deoxidation of Ti scrap was conducted through electrolytic refining and chemical reaction with MgCl₂ molten salt electrolysis. The oxygen concentration in Ti scraps was decreased by the electrochemical and chemical reactions generated by the applied voltages. The optimized conditions for the process were derived by controlling the conditions and parameters by decreasing the thermodynamic activity of the reactants. The correlation between the deoxidation efficiency and the behavior of the voltage and current was confirmed by setting the conditions of the electrolysis process in various voltage ranges. In addition, the correlation between the presence of impurities and the measured oxygen concentration was evaluated. The surface element analysis result indicated that the salt that was not removed contained a certain amount of oxygen. Thus, the removal efficiencies of impurities and particles by deriving various post-treatment process conditions were analyzed. The results confirmed that the most stable and efficient current was formed at a specific higher voltage. Moreover, the best deoxidation result was 2425 ppm, which was 50% lower than that of the initial Ti scrap.

【 授权许可】

Unknown