Shin-Etsu Rare Earth Magnets

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Jet mill

An air jet pulverizer. Such a machine pulverizes using the kinetic energy of a fluid without using a pulverizing medium such as balls. The raw material is caught up in the gas ejected from the nozzle at high pressure and the particles riding in the high-pressure gas collide with and pulverize each other due to the motion of the gas or the particles riding on the high-pressure gas collide with a collision plate and pulverized. Since rare earth alloys are generally active and react violently with oxygen, they are pulverized with a jet mill using high-pressure nitrogen gas with the oxygen removed.

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Glossary list