IME Process Metallurgy and Metal Recycling, RWTH Aachen University , Aachen , Germany
IME Process Metallurgy and Metal Recycling, RWTH Aachen University , Aachen , Germany
IME Process Metallurgy and Metal Recycling, RWTH Aachen University , Aachen , Germany
Yttrium belongs to the rare earth elements and critical metals.Yttrium oxide is mostly used in fluoroscent lamps, production ofelectrodes, in electronic filters, lasers, superconductors and asadditives in various titanium-aluminium materials to improve theirproperties. Recovery of yttrium oxide from secondary sourcessuch as red mud, coatings from ceramic industry and phosphors isextremely important. The main aim of this study is to examine theselective recovery of yttrium oxide from Al-Ti based secondarymaterials using one combined method based mostly on leachingfor selective recovery of yttrium containing: crashing and grindingof materials, sieving, leaching of chosen fine fraction withhydrochloric acid, precipitation with oxalic acid in order to producea pure yttrium oxalate, filtration and a final thermal decompositionof yttrium oxalate. The present study summarized mostly theinfluence of different reaction parameters such as leachingtemperature, time and concentration of hydrochloric acid onyttrium dissolution from Al-Ti based secondary materials. Anincrease of dissolution time and temperature increases yttriumdissolution. An increase of pressure from an atmospheric pressureto 0.5 MPa at 150°C leads to the maximum dissolution of yttrium(about 98.6 %). The final produced yttrium oxide after thermaldecomposition of yttrium oxalate was analyzed using SEM andEDS-analysis.
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Srecko Stopic, Bernd Friedrich
(2021)
Advances in Understanding of the Application of Unit Operations in Metallurgy of Rare Earth Elements
Metals, 11(6)
10.3390/met11060978
Nyambane Clive Ontita, Richmond Anaman, Charles Amanze, Hyline N. Nyangweso, Yilin Xu, Weimin Zeng
(2026)
Synergistic effects of Raoultella species XY-1 and Castellaniella species strains on Yttrium(III) recovery and organic wastewater treatment in bioelectrochemical systems
Journal of Environmental Chemical Engineering, 14(4)
10.1016/j.jece.2026.123401The statements, opinions and data contained in the journal are solely those of the individual authors and contributors and not of the publisher and the editor(s). We stay neutral with regard to jurisdictional claims in published maps and institutional affiliations.