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24/04/15

The third process of magnet production process: air flow mill

NdFeB magnet jet mill powder technology in the magnetic material powder process has been popularized, promoted for many years, with the NdFeB sling and hydrogen crushing process mature, new energy-saving and more efficient jet mill gradually developed and utilized. The jet mill used by NdFeB magnets is a circulating tubular jet mill, which is composed of a jet mill, a cyclone separator, a dust collector and an induced draft fan. After the compressed air is filtered and dried, it is sprayed into the crushing chamber at high speed through the Laval nozzle. At the intersection of multiple high-pressure airflows, the materials are repeatedly collided, rubbed and sheared to crush, and the crushed materials are driven by the fan.

24/04/15

The second process of magnet production process: hydrogen crushing

After the rare earth raw material of the magnet is melted and cooled in a melting furnace to form a sling sheet, it enters the hydrogen crushing section, which is the rough crushing and medium grinding of rare earth alloy, with a feed size of 100-0.1mm and a powder size of 10-1000UM. The powder particle size of NdFeB permanent magnet should be 3-5UM, which should be finely ground by air flow mill. Hydrogenation fragmentation (HD) method is hydrogen absorption lattice expansion and dehydrogenation reduction to refine the particle size, and hydrogen absorption or dehydrogenation is a reversible chemical reaction process, physical and chemical reaction has its chemical composition and magnetic change. NdFeB crystals absorb hydrogen, generate hydride lattice expansion, and generate heat, chemical processes; expansion

24/04/15

The first process of magnet production: smelting

Smelting is the first process for producing sintered NdFeB strong magnets. The melting furnace produces alloy flings. The process requires the furnace temperature to reach about 1300 degrees and lasts for four hours. After this process, the raw materials of the magnet are processed into alloy sheets by hot melting and cooling, and then the next process is carried out, hydrogen crushing. The smelting section is carried out after batching. This step is mainly responsible for casting the prepared materials into tablets or ingots, which are completed by large furnaces and small furnaces respectively. Next, Jiada Magnetoelectric, the largest magnet manufacturer in Guangdong Province, will explain the melting of cast pieces respectively: the instruments, tools and auxiliary materials needed in melting are basically the same.

24/04/15

How much money a powerful magnet?

Many people will ask how much a powerful magnet costs. This is a very general question. There are many factors that affect the price of magnets, as long as it is some parameters of the magnet itself. The basic parameters of the magnet include the size of the magnet, the diameter and thickness of the circular magnet, the length, width and height of the square magnet, and the size of the inner and outer holes of the magnet with holes, because these sizes determine the amount of material and the processing cost. These parameters are the physical basic parameters of the magnet, the internal material parameters, including the performance of the magnet, the temperature resistance, the plating layer and the packaging requirements. Therefore, if you want to know the specific price of magnets, you need to integrate the above parameters and make further verification.

24/04/08

Development of Magnet

The development of magnets has a long history. 5000 years ago, human beings discovered the natural magnet (Fe304) 2300 years ago, the Chinese ground the natural magnet into a spoon shape and placed it on a smooth plane. Under the action of geomagnetism, the spoon handle guide called "Si Nan" the world's first south guide. 1000 years ago, Chinese people used magnets and iron needles to make the world's earliest compass. Around 1100, China linked the magnet needle and the azimuth disk into a whole, becoming a magnet-type pointing instrument for navigation. 1405-1432 Zheng He started the great pioneering work of navigation in human history with the South-pointing instrument. 1

24/04/08

What is the difference between magnet and magnet?

The difference between magnet and magnet: 1. magnet generally refers to the natural magnetic metal ore, is the earth's magnetic field magnetized ore. 2. Magnets are metal alloys that are artificially processed and magnetized. 3. The magnet is processed from ore and is a permanent magnet from nature and does not require current. The magnet may be a processed permanent magnet or an electromagnet. Electromagnets need current to generate a magnetic field. When the current is cut off, the magnetic force of the electromagnet disappears. Source: magnet manufacturer Youlian Magnetics www.youliancy.com

24/04/02

Processing of commonly used magnets

Commonly used magnets are processed into a cylinder: the diameter is 2mm to 100mm, and the thickness is above 0.5mm. Circular magnets are simple to process and can be formed once. Therefore, circular magnets are mostly used when making orders. The biggest advantages of this magnet are fast processing speed and short delivery time. Square magnet: square magnet processing is slow, because it needs to cut 6 sides, a product needs to be processed 3 times to be successful, compared to the round magnet more than two processes, so the square magnet processing speed is slow, long delivery time. Three-belt products: before the product is cut and processed, a hole of the specified size is punched on the wool blank and then

24/04/02

Detailed explanation of the production process of NdFeB strong magnet

NdFeB magnets are widely cited for their excellent magnetic energy and low price. Mainly used in electro-acoustic devices, components, instrument industry, automotive industry, nuclear magnetic resonance, magnetic therapy, health care and other fields. The use is very extensive.

24/04/02

Why does the magnet suck iron and what is the principle of the magnet?

Magnetism like magnets is one of the basic properties of matter, and all matter is a magnetic medium. It is divided into three types: 1. paramagnetic material, this kind of material under the action of magnetic field and external magnetic field of the same additional magnetic field, most of the material belongs to this category, 2. A diamagnetic substance that produces an additional magnetic field opposite to the external magnetic field under the action of a magnetic field, such as copper and inert gases. 3. Ferromagnetic substances, which generate a strong additional magnetic field the same as the external magnetic field under the action of a magnetic field, such as iron, cobalt, nickel, etc. According to the hypothesis first proposed by Ampere, there is a permanent molecular current with a certain magnetic moment in the paramagnetic molecules.

24/04/02

Principle of magnet attraction and repulsion

The magnet is divided into two poles, N pole and S pole. The same poles repel each other, and the different poles attract each other. The forces that attract or repel each other are magnetic field forces, which are generated in a magnetic field. Faraday introduced the concept of magnetic induction lines in order to explain the magnetic field. The magnetic line of induction is a closed curve that is artificially specified but does not actually exist. Inside the magnet from S to N, outside from N to S. When the magnetic induction line is in the same direction, it is attractive, and when it is in the opposite direction, it is repulsive. When there is a certain angle, the magnet has a rotation trend, and the direction of the magnetic induction line is consistent. In general, the magnetic induction line is not an objective existence, it is just a concept introduced by people to study the force in the magnetic field and the phenomenon of electromagnetic induction. This article

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