Recycling and reuse of magnets

Recycling and reuse of magnets

With the wide application and use of magnets, such as electronics, electric tools, automobiles, medical equipment and other industries, magnets have become an indispensable raw material. The recycling and reuse of magnet resources can not only effectively reduce the waste of magnet resources, but also protect the environment and promote sustainable economic development. This article will focus on the recycling and reuse of magnets.

1. Recycling of magnets

The recycling of magnets refers to the adoption of a series of processes to process waste magnets for further processing and reuse. Usually, magnet recycling includes: magnet sorting, magnet crushing, steel recycling and other different processes.
Magnet Sorting
Magnet sorting is to screen and separate waste magnets by magnetic force. The magnetic separation equipment used in the factory can screen and separate according to different magnet types. For example, to recycle NdFeB magnets (NdFeB), the magnetic separation equipment attracts the magnets on a rotating wheel, and then removes other non-ferromagnetic materials from the magnets, so that pure NdFeB magnets can be obtained.
broken magnet
The crushing of waste magnets is also an important part of magnet recycling. This is to crush and extract disposable waste magnets through physical, chemical and mechanical methods. First, the waste magnets are disassembled and then crushed. The magnet powder is mixed with steel powder, and then heated or ashed to obtain the original sheet material. This method is mainly suitable for recycling permanent magnets

Iron, and composite materials containing multiple metals.
steel recycling
Recycling waste magnets for steel is another important method of magnet recycling. This method is mainly to send waste magnets to steel plants for smelting. Scrap magnets are melted and mixed with other steel scrap, then cooled at high temperatures. During the cooling process, organic matter and other impurities are filtered out, resulting in a high-quality steel material.

2、the reuse of magnets

With the wide application and use of magnets, such as electronics, electric tools, automobiles, medical equipment and other industries, magnets have become an indispensable raw material. The recycling and reuse of magnet resources can not only effectively reduce the waste of magnet resources, but also protect the environment and promote sustainable economic development. This article will focus on the reuse of magnets.
1. Manufacture of new magnet materials
Scrap magnets can be used to make new magnet materials. In magnet recycling, recycled permanent magnet materials can be reused to make new magnet materials. Recycled ferromagnetic metals, such as steel, can be used in the metallurgical industry to produce new magnet materials. For example, new NdFeB magnets can be manufactured by adding some rare earth materials to produce NdFeB materials in molten steel in steel plants, and the strength of this regenerated NdFeB magnet is comparable to that of new NdFeB magnets. This reuse method, in addition to saving resources, also reduces production costs.

2. Manufacture of building materials
Scrap magnets can be used to make building materials, making them recycled into valuable raw materials. Magnets can be ground into very small particles, and then added to construction materials such as concrete, metallurgical industry, and other building materials to enhance the mechanical properties and earthquake resistance of the material. Magnets are added to concrete, which can strengthen the concrete's compressive and tensile properties during compression and tension, and when subjected to natural disasters such as earthquakes, this material can also improve the earthquake resistance of buildings.
3. Manufacturing materials are renewable energy
Scrap magnets can also be used to make renewable energy materials, such as magnets in magneto generators. These magnet materials are required for the manufacture of permanent magnet rotors in renewable energy generation equipment. This method can not only reduce the pollution of waste to the environment, but also achieve the purpose of saving resources and supplementing renewable energy.

4. Manufacturing batteries
Waste magnets can also be used to make batteries. For example, permanent magnets can be used as positive electrode materials in batteries, using oxides in the magnets to form electrodes. In addition, permanent magnets have a good effect on the efficient operation of motors and other equipment, and converting waste magnets into battery materials can also supplement the materials used to produce batteries.
Through research, it is found that elements such as neodymium and cobalt in permanent magnets can be used to manufacture lithium-ion batteries, thus supplementing the production resources of batteries. Waste magnets are also widely used in lithium iron phosphate batteries. As anode materials in batteries, they have a significant effect on improving battery performance. In addition, waste magnets can also be used to manufacture other types of batteries such as magnesium batteries, so that waste magnets can be fully utilized and at the same time promote the R&D and industrial development of batteries and related fields.
5. Other applications
In addition to the above applications, waste magnets can also be reused in other fields. For example, recycled magnets can be used to produce various types of magnet cutters or magnetic adsorbers. Crawling robots, magnetic cards, and motors in driving cars are also important application areas for waste magnets.
In short, the reuse of magnets can make full use of valuable waste resources, and can also promote environmental protection and sustainable economic development. With the continuous development of technology and the accumulation of experience, the application prospects in the field of magnet recycling and reuse will become more and more extensive, and the opportunities and challenges will also increase accordingly.

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