About this Abstract |
| Meeting |
2026 TMS Annual Meeting & Exhibition
|
| Symposium
|
Thermodynamics for Sustainability: An EPD Symposium in Honor of Kazuki Morita
|
| Presentation Title |
Recovery of valuable elements through localized phase separation at elevated temperature |
| Author(s) |
Yu-ichi UCHIDA |
| On-Site Speaker (Planned) |
|
| Abstract Scope |
Global consumption of resources has continued year by year and then exhaustion of high-quality raw materials is concerned. Industrial byproducts such as ferrous and nonferrous slags are promising candidates for sustainable resource. Aiming to recover valuable elements from the slag or sludge, a fundamental study on condensation of target elements in a particular phase through spontaneously localized phase separation at elevated temperature was carried out. With respect to phosphorus-containing slag, the basic [CaO-SiO2-P2O5] ternary system and Al2O3 or Fe2O3 added therein showed precipitation of solid 3CaO･P2O5 as the phosphorus-concentrated phase. The solid/liquid phase distribution drastically varied depending on temperature or chemical composition as CaO/SiO2, and are discussed in terms of the properties such as viscosity or interfacial tension toward attaining effective recovery of target element. Possible expansion of similar concept to other elements such as vanadium will be also introduced. |
| Proceedings Inclusion? |
Planned: |
| Keywords |
Recycling and Secondary Recovery, Pyrometallurgy, Extraction and Processing |