About this Abstract |
Meeting |
2023 TMS Annual Meeting & Exhibition
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Symposium
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Scandium Extraction and Use in Aluminum Alloys
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Presentation Title |
Investigations into Optimized Industrial Pilot Scale BR Leaching for Sc Extraction |
Author(s) |
Efthymios Balomenos, Panagiotis Davris, Alexandra Apostolopoulou, Danai Marinos, Elena Mikeli, Aikaterini Toli, Dimitris Kotsanis, Grigoris Paschalis, Dimitrios Panias |
On-Site Speaker (Planned) |
Efthymios Balomenos |
Abstract Scope |
Scandium is a critical metal with increasing demand in modern technologies, like oxide fuel cells, light-weight Al-Sc alloys and it is present at considerably high concentrations in various metallurgical by-products, including the bauxite residue (BR). Scandium extraction from the Greek bauxite residue (BR) that contains 70–100 mg/kg Sc has been demonstrated at an industrial pilot plant at MYTILINEOS. BR has been treated with sulfuric acid at conditions that allow for low acid consumption. In such conditions, high Sc leaching selectivity is achieved over Fe and Ti, which are the main impurities for the further purification of the leachate through the ion-exchange technique. This paper reports on the recent investigations on the effect of pH control during the leaching process, which can lead to optimized Sc leaching yields. Moreover, the treatment of the produced leachate solution is also studied, in order to further refine it, prior to the ion-exchange. |
Proceedings Inclusion? |
Planned: Light Metals |
Keywords |
Hydrometallurgy, Sustainability, Aluminum |