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Investigations into Optimized Industrial Pilot Scale BR Leaching for Sc Extraction

Minerals, Metals and Materials Series, ISSN: 2367-1696, Page: 1167-1172
2023
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Conference Paper Description

Scandium is a critical metal with increasing demand in modern technologies, like solid oxide fuel cells and light-weight Al-Sc alloys. Sc 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 results. Moreover, the treatment of the produced leachate solution is also studied, in order to further refine it, prior to the ion-exchange.

Bibliographic Details

Efthymios Balomenos; Panagiotis Davris; Alexandra Apostolopoulou; Grigoris Paschalis; Dimitrios Panias; Danai Marinos; Elena Mikeli; Aikaterini Toli; Dimitrios Kotsanis

Springer Science and Business Media LLC

Materials Science; Energy; Engineering

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