Investigation on the Recovery of Rare Earth Fluorides from Spent Rare Earth Molten Electrolytic Slag by Vacuum Distillation DOI Open Access
Z. X. Yang, F. Xiao, Shuchen Sun

и другие.

Materials, Год журнала: 2025, Номер 18(7), С. 1538 - 1538

Опубликована: Март 28, 2025

Spent rare earth molten salt electrolytic slag (REMES) needs to be recovered not only because of its economic value elements (REEs), lithium, and fluorine, but also for the environmental benefits. Vacuum distillation has many advantages, such as a short process less wastewater. Aiming find an environmentally friendly method recover REEs, this research studied challenges in recovering REMES by vacuum solutions handle these obstacles. Distillation experiments raw material were initially implemented XRD, XPS, DSC, SEM methods used investigate phase changes REMES, thus discovering that oxide impurities could transform REF3 into REOF, which significantly affected REEs recovery. Only 42.04% evaporated at 1573 K 0.1 Pa 4 h with 99.99% LiF. To tackle issue, fluorination pretreatment was proposed. NH4HF2 utilized impurities, RE2O3, REOF fluorides almost no waste gas released, improving recovery efficiency 86.23%. Therefore, paper proposes fluorination–vacuum method, from efficiently wastewater or released.

Язык: Английский

Investigation on the Recovery of Rare Earth Fluorides from Spent Rare Earth Molten Electrolytic Slag by Vacuum Distillation DOI Open Access
Z. X. Yang, F. Xiao, Shuchen Sun

и другие.

Materials, Год журнала: 2025, Номер 18(7), С. 1538 - 1538

Опубликована: Март 28, 2025

Spent rare earth molten salt electrolytic slag (REMES) needs to be recovered not only because of its economic value elements (REEs), lithium, and fluorine, but also for the environmental benefits. Vacuum distillation has many advantages, such as a short process less wastewater. Aiming find an environmentally friendly method recover REEs, this research studied challenges in recovering REMES by vacuum solutions handle these obstacles. Distillation experiments raw material were initially implemented XRD, XPS, DSC, SEM methods used investigate phase changes REMES, thus discovering that oxide impurities could transform REF3 into REOF, which significantly affected REEs recovery. Only 42.04% evaporated at 1573 K 0.1 Pa 4 h with 99.99% LiF. To tackle issue, fluorination pretreatment was proposed. NH4HF2 utilized impurities, RE2O3, REOF fluorides almost no waste gas released, improving recovery efficiency 86.23%. Therefore, paper proposes fluorination–vacuum method, from efficiently wastewater or released.

Язык: Английский

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