Decoding the Core Technology of Electromagnetic Iron Removers - How High-Gradient Magnetic Fields Achieve "Precise Iron

The core competitiveness of electromagnetic iron removers stems from the "high-gradient magnetic field" technology, but behind it lies the collaborative innovation of magnetic circuit design, material selection and intelligent control. Unlike the limitations of traditional permanent magnetic separators, such as "low magnetic field strength and narrow coverage range", modern electromagnetic separators achieve dual breakthroughs in magnetic field strength and gradient through a composite structure of "magnetic conductive medium + excitation coil". ​
Take the JC electromagnetic separator as an example. Its magnetic circuit design adopts a "multi-stage superimposed structure" : Nanoscale magnetic conductive media (such as ferrite composite materials) are uniformly distributed in the magnetic field cavity. When the excitation coil is energized, the magnetic conductive media will form dense "magnetic field nodes", increasing the local magnetic field gradient by 10 to 20 times. Even ultrafine iron impurities as small as 0.003mm can be precisely captured. Meanwhile, the equipment is equipped with a "constant current control system". When the resistance value of the coil fluctuates due to temperature changes, the system will automatically adjust the output voltage to ensure that the fluctuation of the magnetic field strength is ≤5%, avoiding the decline in iron removal efficiency caused by unstable magnetic fields. ​
In addition, the selection of contact materials directly affects the iron removal effect and safety. For the food industry, JC electromagnetic iron removers are made of 304 stainless steel with food-grade Teflon coating, which is non-stick and easy to clean, and meets GMP standards. For the new energy industry, 316L stainless steel is resistant to corrosion by hydrofluoric acid and nitric acid, making it suitable for the harsh environment in the polysilicon cleaning process. It is precisely the refinement of these technical details that enables high-gradient magnetic fields to truly achieve "precise iron removal", meeting the differentiated demands of various industries.