|About this Abstract
||2022 TMS Annual Meeting & Exhibition
||REWAS 2022: Recovering the Unrecoverable
||Deoxidation of Titanium Using Cerium Metal and Its Oxyhalide Formation
||Gen Kamimura, Takanari Ouchi, Toru H. Okabe
|On-Site Speaker (Planned)
Recycling of titanium (Ti) scraps requires the direct removal of oxygen (O) from the Ti scraps. Many deoxidation techniques for Ti have been developed; however, the strong affinity between Ti and O has limited their cost-effectiveness. In this study, we developed a new deoxidation process for Ti using cerium (Ce) metal, which is the most abundant and the lowest-price rare earth element. The thermodynamic analysis suggests that the deoxidation through the formation of Ce oxyhalides in halide fluxes containing Ce ions can produce Ti with extremely low O concentration. We experimentally demonstrated that the formation reaction of CeOCl with Ce metal can deoxidize Ti metal and produce highly pure Ti with 100 mass ppm O or below, which is lower than the O concentration of the virgin Ti produced through the Kroll process. This deoxidation process with Ce metal enables Ti scraps contaminated with O to be recycled.
||Titanium, Recycling and Secondary Recovery, Pyrometallurgy