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Study on Crystallization Behavior of NdF3-LiF-Nd2O3-NdF2 Molten Salt System AITranslate

JIANG Yin-ju; DUAN Chao; DENG Yong-chun; XIN Wen-bing; TANG Jia-yue; FAN Wen-jun
School of Materials and Metallurgy,Inner Mongolia University of Science&Technology;School of Materials and Metallurgy,Inner Mongolia University of Science&Technology;School of Materials and Metallurgy,Inner Mongolia University of Science&Technology;School of Materials and Metallurgy,Inner Mongolia University of Science&Technology;School of Materials and Metallurgy,Inner Mongolia University of Science&Technology;School of Materials and Metallurgy,Inner Mongolia University of Science&Technology
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Publisher: Editorial Office of Rare Metals and Cemented Carbides
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Abstract AITranslate

In the molten salt electrolysis process of rare earth oxide in fluoride system,the crystallization behavior of the molten salt significantly affects the electrolysis process.The study investigated three molten salt systems,namely NdF3-LiF-Nd2O3,NdF3-LiF-NdF2,and NdF3-LiF-Nd2O3-NdF2(with a fixed mass ratio of NdF3 to LiF of 85∶15),to measure the crystallization temperature of the molten salt using the cooling viscosity curve and analyze the crystalline phase by XRD.The results show that in the molten salt systems of NdF3-LiF-Nd2O3 and NdF3-LiF-NdF2,the crystallization temperature of the molten salt increases with the increase in Nd2O3 or NdF2 content,and the crystalline phases are NdOF and NdF2,respectively.In the molten salt system of NdF3-LiF-Nd2O3-NdF2,when the Nd2O3 content is in the range of 2%~3%with the NdF2 content in the range of 1%~3%,the crystallization temperature of the molten salt is in 981~988℃,and NdOF cocrystallizes with NdF2.To inhibit the crystallization and precipitation of the molten salt during the molten salt electrolysis process of rare earth,effective measures could be taken by appropriately increasing the temperature at the bottom of the electrolysis cell and improving the flowability of the molten salt at the bottom.

KeyWords AITranslate

molten salt electrolysis NdF3-LiF-Nd2O3-NdF2 viscosity crystallization temperature crystalline phase

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DOI：

Chinese Library Classification Number:TF845.6[冶金工程—有色金属冶金]

Citation Information:

In the molten salt electrolysis process of rare earth oxide in fluoride system,the crystallization behavior of the molten salt significantly affects the electrolysis process.The study investigated three molten salt systems,namely NdF3-LiF-Nd2O3,NdF3-LiF-NdF2,and NdF3-LiF-Nd2O3-NdF2(with a fixed mass ratio of NdF3 to LiF of 85∶15),to measure the crystallization temperature of the molten salt using the cooling viscosity curve and analyze the crystalline phase by XRD.The results show that in the molten salt systems of NdF3-LiF-Nd2O3 and NdF3-LiF-NdF2,the crystallization temperature of the molten salt increases with the increase in Nd2O3 or NdF2 content,and the crystalline phases are NdOF and NdF2,respectively.In the molten salt system of NdF3-LiF-Nd2O3-NdF2,when the Nd2O3 content is in the range of 2%~3%with the NdF2 content in the range of 1%~3%,the crystallization temperature of the molten salt is in 981~988℃,and NdOF cocrystallizes with NdF2.To inhibit the crystallization and precipitation of the molten salt during the molten salt electrolysis process of rare earth,effective measures could be taken by appropriately increasing the temperature at the bottom of the electrolysis cell and improving the flowability of the molten salt at the bottom.

quote

GB/T 7714-2015 [1] JIANG Yin-ju, DUAN Chao, DENG Yong-chun, et al. Study on Crystallization Behavior of NdF3-LiF-Nd2O3-NdF2 Molten Salt System[J]. Rare Metals and Cemented Carbides, 2024(2): 1-5.
MLA [1] JIANG Yin-ju, et al., "Study on Crystallization Behavior of NdF3-LiF-Nd2O3-NdF2 Molten Salt System." Rare Metals and Cemented Carbides, no. 2, 2024, pp. 1-5.
APA [1] JIANG Yin-ju, DUAN Chao, DENG Yong-chun, XIN Wen-bing, TANG Jia-yue, & FAN Wen-jun. (2024). Study on Crystallization Behavior of NdF3-LiF-Nd2O3-NdF2 Molten Salt System. Rare Metals and Cemented Carbides(2), 1-5.
IEEE [1] JIANG Yin-ju, DUAN Chao, DENG Yong-chun, XIN Wen-bing, TANG Jia-yue, and FAN Wen-jun, "Study on Crystallization Behavior of NdF3-LiF-Nd2O3-NdF2 Molten Salt System," Rare Metals and Cemented Carbides, no. 2, pp. 1-5, 2024. keywords: {molten salt electrolysis;NdF-LiF-NdO-NdF;viscosity;crystallization temperature;crystalline phase}