| About this Abstract |
| Meeting |
2022 TMS Annual Meeting & Exhibition
|
| Symposium
|
REWAS 2022: Recovering the Unrecoverable
|
| Presentation Title |
Deoxidation of Titanium Using Cerium Metal and Its Oxyhalide Formation |
| Author(s) |
Gen Kamimura, Takanari Ouchi, Toru H. Okabe |
| On-Site Speaker (Planned) |
Gen Kamimura |
| Abstract Scope |
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. |
| Proceedings Inclusion? |
Planned: |
| Keywords |
Titanium, Recycling and Secondary Recovery, Pyrometallurgy |