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Regeneration of Neodymium magnet

by Jian Guo

Regeneration of Neodymium magnet

Neodymium magnet is a kind of strong magnetic material, which is mainly composed of rare earth elements such as neodymium, iron and boron. It has excellent performance such as high strength, high magnetic energy product, high paramagnetic factor, and low hysteresis loss, and is widely used in various fields such as motors, sensors, electronic transformers, magnetic recording, and permanent magnet durable products.
With the wide application of Neodymium magnet in various industries, the amount of its waste is also increasing. In the early days, people carried out traditional recycling methods for waste Neodymium magnet, such as physical and chemical methods, but these methods were inefficient, costly and harmful to the environment. Therefore, in recent years, researchers have begun to explore new methods to achieve efficient regeneration and recycling of Neodymium magnet.

A new regeneration technology of Neodymium magnet is molten salt electrolysis. The method uses electrolytic molten salt to decompose the waste Neodymium magnet into simple substances, and can make new Neodymium magnet materials under the same process conditions. This technology has advantages such as high recovery rate, low cost, environmental friendliness, and high efficiency, and has broad development prospects in industrial applications.

The implementation of molten salt electrolysis method needs to consider the following aspects:

The first is the composition of molten salt. The composition of molten salt shall be adjusted according to the physical and chemical characteristics of Neodymium magnet to give full play to its decomposition performance. Generally, sodium chloride, calcium chloride, Lithium chloride and other compounds can be used to prepare molten salt to adjust the conductivity of molten salt and the decomposition ability of waste Neodymium magnet.

Next is the control of reaction conditions. The control of reaction conditions directly affects the decomposition efficiency of waste Neodymium magnet and the properties of products. In the molten salt electrolysis method, conditions such as reaction temperature, voltage, current density, and reaction time are important parameters that need to be continuously adjusted and optimized based on experimental data to achieve the best decomposition efficiency and product purity.
Once again, it is waste disposal. Waste Neodymium magnet may contain mixtures of other materials, which need to be treated in molten salt electrolysis. The presence of some Light metal impurities will affect the performance of Neodymium magnet Solid solution, so corresponding treatment methods need to be taken, such as adding reducing agent or selecting a certain current density to make it reduce.
Finally, the application of regenerated products. Regenerated Neodymium magnet materials need to be applied to achieve recycling. Regenerated products can be used to produce various types of magnetic components, as well as in fields such as magnetic recorders and motors. Applying recycled Neodymium magnet materials directly to the manufacturing process of new products can not only effectively reduce product costs, but also reduce the amount of waste and environmental pollution.

In short, Neodymium magnet is an important strong magnetic material, which is widely used in motor, sensor, electronic transformer, magnetic recording, permanent magnet durable products and other fields. With the expansion of the application scope, the amount of waste also increases, so it is necessary to explore new regeneration technologies to achieve efficient regeneration and recycling of Neodymium magnet. Molten salt electrolysis method is a new regeneration technology that takes into account efficiency, environment, and cost, and has broad application prospects. In the implementation process of molten salt electrolysis, it is necessary to consider the composition of molten salt, control of reaction conditions, waste treatment, and application of regenerated products.

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