Production of Nd-Fe Foundry Alloy by Electrolysis in Molten Salts

Makaseev, Yuriy; Buinovskiy, Alexander; Zhitkov, Sergey; Kartashov, Evgeniy; Sofronov, V. L.

doi:10.1051/matecconf/20179600009

Cited by 3 publications

(1 citation statement)

References 5 publications

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“…Although the experimental results are quite perfect, it is difficult to promote this experimental method in an industrial environment. Yu Makaseev et al [119] used Fe rods as self-consuming cathodes to electrolytically produce Nd-Fe cast alloys in an inert atmosphere. The experiment resulted in a current efficiency of up to 90%, significantly higher than the actual current efficiency in the industry.…”

Section: Nd Alloysmentioning

confidence: 99%

Research Status of Electrolytic Preparation of Rare Earth Metals and Alloys in Fluoride Molten Salt System: A Mini Review of China

Liao,

Que,

et al. 2024

Metals

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China’s rare earth reserves and consumption are the highest in the world. Rare earth metals and alloys play a pivotal role in the domains of permanent magnetic materials, hydrogen storage materials, luminescent materials, abrasive materials, etc. The molten salt electrolysis process is the most widely used method for producing light rare earth metals and alloys in China, with distinct advantages such as continuous production and short process flow. This article focuses on the process technology of preparing rare earth metals and alloys by electrolyzing rare earth oxides in fluoride systems. This article summarizes the effects of process parameters such as cathode and anode structures, electrolysis temperature, and current density on the direct recovery and current efficiency of the preparation of light rare earth metals (La, Ce, Pr, Nd), RE–Mg (RE for rare earth) alloys, RE–Al alloys, RE–Ni alloys, and other rare earth alloys. Meanwhile, the disadvantages of the electrolytic cells and electrode configurations that are currently used in industrial production are discussed. Accordingly, the future prospects of molten salt electrolysis technology in the preparation of rare earth metals and alloys are clarified.

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Section: Nd Alloysmentioning

confidence: 99%

Research Status of Electrolytic Preparation of Rare Earth Metals and Alloys in Fluoride Molten Salt System: A Mini Review of China

Liao,

Que,

et al. 2024

Metals

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Electrodeposition of a Rare‐Earth Iron Alloy from an Ionic‐Liquid Electrolyte

Šturm

Zavašnik

et al. 2019

ChemElectroChem

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Rare earth element (REE)-based metals and alloys are generally synthesized by molten-salt electrolysis which is an energyintensive approach. Previous attempts to deposit alloys of rare earths from solutions at mild temperatures have met with little success. Excitingly, in this investigation we were able to electrodeposit NdÀ Fe from the 1-ethyl-3-methylimidizolium dicyanamide ([EMIM][DCA]) ionic liquid (IL) at 110°C. We observed that Nd III cannot be reduced independently, although it can be co-deposited inductively on a Cu substrate with the addition of Fe II . The transmission electron microscopy (TEM) analysis combined with electron-energy-loss spectroscopy (EELS) verified that Nd III is reduced to Nd 0 during the electrodeposition process. The TEM/EELS was also able to confirm that the deposition of the NdÀ Fe starts with the sole deposition of Fe, followed by the co-deposition of NdÀ Fe. This is in agreement with transition-state theory, which has the iron initially reduced to an activated state (Fe*), where it is able to catalyse the reduction of the rare earth from Nd III to Nd 0 . This new insight into the electrodeposition process brings us a very important step closer to being able to recycle rare earths efficiently and even to realise electrodeposited rare-earth-based permanent-magnet thin films at a mild temperature, thus giving us a sustainable, green-chemistry approach that provides a genuine alternative to high-temperature molten-salt electrolysis.[a] X.

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Electrochemical behaviors of neodymium ions on a solid iron electrode in molten lithium fluoride and reaction kinetics of forming Nd2Fe17 intermetallic compound

Yang

Zhao

2021

Separation and Purification Technology

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Production of Nd-Fe Foundry Alloy by Electrolysis in Molten Salts

Cited by 3 publications

References 5 publications

Research Status of Electrolytic Preparation of Rare Earth Metals and Alloys in Fluoride Molten Salt System: A Mini Review of China

Research Status of Electrolytic Preparation of Rare Earth Metals and Alloys in Fluoride Molten Salt System: A Mini Review of China

Electrodeposition of a Rare‐Earth Iron Alloy from an Ionic‐Liquid Electrolyte

Electrochemical behaviors of neodymium ions on a solid iron electrode in molten lithium fluoride and reaction kinetics of forming Nd2Fe17 intermetallic compound

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