Types of Magnets Used in Industrial Process Plants
Ceramic Magnets – Strontium Ferrite (SrO·6Fe2O3)
Typically, permanent ceramic magnets are made of strontium ferrite, which has a high coercivity rating and resistant to becoming demagnetized. Compared to other magnetic core materials, ceramic magnets are inexpensive and are widely used in heavy industrial applications. HSMAG utilizes ceramic magnets in many of our products such at magnetic plates, grate magnets, and suspended permanent magnets.
Rare Earth Magnet – Neodymium (NdFeB), Samarium Cobalt (SmCo5)
A Rare Earth Magnet, also known as a neodymium magnet, is the strongest permanent magnetic core material available from HSMAG. Rare earth magnets have approximately 14 times the magnetic pull forces when compared to ceramic ferrite magnets. Neodymium magnets are utilized when tramp metal contaminants have smaller particle sizes or difficult shapes to capture such as spheres for instance.
High temperature applications often use samarium cobalt instead of neodymium due to a higher Curie point – the temperature at which a magnet loses their permanent magnetic properties.
Electromagnets – Aluminum or Copper Core
Electromagnets generate a magnetic field by an electric current from copper or aluminum wire wound into a coil around a solid core. The magnetic field is concentrated at the core which is made from ferrous material (iron) and concentrates the magnetic flux and creates an extremely powerful magnet.
Industries such as mining, aggregates, and concrete recycling utilize electromagnetic separators to remove large tramp contaminants such as bucket teeth, rebar, and crusher teeth.
For most people, when they think of a magnet they think of a simple item that sticks to a refrigerator door, or a clasp that holds a piece of jewelry together. But there is a whole other world of magnets classified for industrial use. In fact, if you look around your home or office you’ll find a wide range of products that were produced or incorporated with an industrial magnet. These include everything from the speakers in your home audio/video system to the sensors in your automobile. Manufacturers have specific requirements on magnet types, sizes, compositions and strength, depending on use. Among the most frequently used industrial magnets are those made from neodymium and samarium cobalt, also known as rare earth magnets, ceramic (ferrite) magnets, electromagnets and alnico magnets.
These magnets are fashioned in bar form, sheets, strips, rings and other configurations, depending on their purpose (such as energy production, or production line facilitation) and environment (temperature, space).
Which Industries Use Magnets & What Are Strong Magnets Used For?
A list of industrial magnet applications would take thousands of words to complete. The mining industry uses magnets to separate ore from metal; pharmaceuticals are subjected to a magnet sweep to remove any iron particles; roads and airport runways are swept by magnets to remove scrap metal that can damage tires, and magnets are an intrinsic part of such items as transformers, electric motors, amplifiers and many other types of industrial equipment. At Adams, we do more than provide industrial magnets. We support new ideas and innovation, and work with our clients to improve their production performance and efficiency. We enjoy nothing more than listening to their needs and assessing their challenges, then working together to come up with an effective solution.