Συντάχθηκε 13-05-2026 08:27
Τόπος: Μ3 - Κτίριο ΜΗΧΟΠ, Μ3.108, ΔΙΑ ΖΩΣΗΣ
Έναρξη: 21/05/2026 11:00
Λήξη: 21/05/2026 12:00
Τίτλος εργασίας (αγγλικά): Advances in beneficiation of a low-grade petalite ore.
(Ελληνικά) : Πρόοδοι στον εμπλουτισμό χαμηλής ποιότητας μεταλλεύματος πεταλίτη.
Tριμελής εξεταστική επιτροπή
1. Ευάγγελος Πετράκης, επικ. καθηγητής σχολής ΜΗΧΟΠ (Επιβλέπων)
2.Κωνσταντίνος Κομνίτσας, καθηγητής σχολής ΜΗΧΟΠ
3. Μιχαήλ Γαλετάκης, καθηγητής σχολής ΜΗΧΟΠ
Περίληψη
The importance of lithium (Li) is recognized by major economies, with the United States (US) and European Union (EU) designating it as a strategic raw material (SRM) necessary for technological breakthrough towards the green and digital transition.
Over the last few years both industry and academia focused on the production of battery-grade concentrates (typical targets >6% Li2O and <1.0% Fe2O3), suitable for lithium carbonate (LiCO3) and/or lithium hydroxide (LiOH) conversion, from hard-rock lithium-bearing minerals, such as spodumene, lepidolite and petalite. The beneficiation of petalite-type pegmatites presents significant challenges due to their low Li2O content, complex mineralogy and the presence of gangue minerals that exhibit similar physical and chemical properties to petalite.
In this dissertation the laboratory-scale beneficiation of a low-grade petalite ore (0.92% Li2O), to pre-concentrate petalite or produce high-grade petalite concentrate, by heavy-liquids separation (HLS), wet high intensity magnetic separation (WHIMS) and froth flotation is being discussed. Heavy-liquids separation shows that both the sink 2.65 and the float 2.55 fractions are enriched in Li2O (1.99% and 1.54%, respectively) compared to the intermediate gravimetric fraction (0.43% Li2O). Magnetic separation shows that magnetic products are enriched in Li2O (~1.2%) compared to non-magnetic product (0.84% Li2O). Froth flotation tests after several rougher and cleaner stages result in a final float product containing 1.16% Li2O.
Λέξεις κλειδιά (Ελληνικά): λίθιο, πεταλίτης, εμπλουτισμός, βαρέα υγρά, μαγνητικός διαχωρισμός, επίπλευση.
Λέξεις κλειδιά (Αγγλικά): lithium; petalite; ore beneficiation; heavy-liquids separation (HLS); magnetic separation;
froth flotation.
