Industrial-grade Neodymium Magnetic Rods
Industrial-grade neodymium magnets (industrial magnetic strips) are industrial iron removal devices. Their core material is rare-earth neodymium iron boron (NdFeB) permanent magnets, encased in 304 or 316L stainless steel tubing. They are primarily used in various industries such as industrial, food, and pharmaceutical manufacturing to improve product purity and protect upstream and downstream equipment. Common specifications include diameters of 10-100 mm and lengths of 20 cm to 2 meters. Thanks to the properties of rare-earth permanent magnets, they can withstand high-temperature environments up to 350°C. The ends of the magnetic rods are typically hammered and can be fitted with threaded holes and lifting rings as needed for use with other equipment. Regularly cleaning adhering iron filings and proper drying and storage are crucial.
-Product Highlights
Round neodymium magnetic rod is equipment designed to remove iron impurities from materials. It features a core made of rare earth neodymium magnets. It provides superior magnetic strength, excellent durability, corrosion resistance, rust protection, and high temperature tolerance. Its smooth surface facilitates cleaning, and customized sizes are available to meet specific application requirements.
-Working Principle
The round neodymium magnetic rod generates a powerful magnetic field through its internal core. When powders, granular materials, or liquid solutions pass through the rod, iron impurities are quickly attracted and adhere to its surface. This process effectively removes iron impurities, purifying the material. It enhances the physical and chemical properties of processed materials and improves production safety.
The high-intensity magnetic plate is a permanent, flat-type magnetic separator that uses neodymium or ferrite magnets housed in 304/316L stainless steel casing. When materials pass over the plate, the strong magnetic field captures iron impurities. Suitable for chutes, conveyors, and feeding inlets handling powders, granular materials, and small bulk materials, it achieves over 98% iron removal efficiency with easy installation, maintenance, and zero operating energy consumption.
-Product Highlights
Pull-out Magnetic Rod (also known as Quick-Clean Magnetic Bar) is a high-intensity magnetic filtration device designed for rapid manual iron removal. It features a stainless steel outer tube, neodymium magnet core, and a central pull rod or handle. Suitable for liquids, slurries, and powders, it enables cleaning without opening the equipment and provides significantly higher efficiency compared to fixed magnetic rods. Widely used in lithium battery, fine chemical, food, and pharmaceutical industries.
-Working Principle
The pull-out magnetic rod works by using the magnetic end to attract iron particles.
When iron particles accumulate on the magnetic section, the operator pulls the rear handle, causing the internal magnetic core to retract inside the protective housing.
This action separates the magnetic field from the collected iron, causing impurities to automatically detach from the rod’s surface.
The self-cleaning pull-out mechanism eliminates the need for manual scraping, significantly improving efficiency and ease of use.
The Teardrop Magnetic Rod (also known as a pear-shaped or drop-shaped magnetic bar) features a teardrop-shaped cross-section and is constructed from a 304/316L stainless steel shell and a neodymium magnet core. It is especially suited for powders with low flow capacity or bridging tendencies. Its advantages include reduced material buildup and increased contact area, making it ideal for square or round hoppers and housing-type magnetic separators.
– Product Highlights
Square magnetic rods have a square cross-section and deliver strong magnetic force. They can be used individually or combined into magnetic grills. The outer tube is made of SUS304 or SUS316L stainless steel. Various sizes and specifications can be selected based on installation direction and material flow, making full use of the structural advantages of square edges.
– Working Principle
Square magnetic rods generate a strong magnetic field through their internal magnetic structure. This magnetic field attracts and captures ferrous impurities and weakly magnetic particles from materials, enabling effective separation of contaminants and improving material purity.
The physical separation process does not alter the properties of the material and meets the requirements of food-grade and medical-grade applications.
Features
Industrial rare-earth neodymium magnets come in a wide variety to meet the needs of different working environments, such as ordinary round neodymium magnets, square neodymium magnets, teardrop-shaped neodymium magnets, and drawn neodymium magnets. They are typically made by bonding sintered neodymium iron boron magnets with epoxy resin to form a magnetic core assembly. The wall thickness is 1.5-2.5 mm, the magnetic strength is 6000 to 12000 Gauss, and the protection rating is IP65. They can adsorb ferromagnetic impurities in powders, granules, and liquids. Specially designed magnetic pole arrangements can generate a gradient magnetic field, effectively improving the adsorption efficiency of iron filings.
Application Areas
Food Processing: NdFeB magnetic rods meet FDA food contact material standards and can be used to remove metallic foreign objects from flour and rice, adsorb iron filings and iron powder mixed in during production, prevent metal contamination of food, and effectively protect downstream equipment such as crushers and packaging machines.
Pharmaceutical Industry: Neodymium iron boron (NdFeB) magnetic rods remove tiny ferromagnetic particles from raw materials during pharmaceutical powder production, preventing metal contamination and improving drug purity to meet GMP standards.
Chemical Industry: Commonly used in plastic granulation and rubber processing, NdFeB magnetic rods remove iron filings from raw materials, preventing metal impurities from entering injection molding machines, effectively protecting molds and screws, and improving production quality.
Besides these applications, NdFeB magnetic rods are also widely used in mining, new energy, and construction industries.
Technical parameters
Standard NdFeB magnetic rods typically have a surface magnetic field strength of 8000-12000 GS, using NdFeB magnets, with a magnetic force decay rate typically <5%/year. A 50mm diameter rod can generate 12000 Gauss of magnetic force (actual magnetic field strength may vary depending on magnet grade, structure, and wall thickness). MagnetGlobal also manufactures stainless steel rare-earth high-strength NdFeB magnetic rods for iron removal and filtration with a magnetic force of 14000 GS. In the processing of granular materials such as quartz sand, a single magnetic rod can be used in magnetic grids or magnetic frame assemblies, with a system throughput of 1–10 tons/hour (depending on the equipment structure and material flow rate). The spacing between the magnetic rods is designed to be 1.2–1.5 times the diameter to ensure sufficient contact between the material and the magnetic field.
Installation and Maintenance
Neodymium magnetic rods are typically edge-hammered at both ends, but can also be equipped with M8-M16 threaded holes or lifting rings at both ends, supporting horizontal or vertical installation. Non-ferrous scrapers should be used during cleaning operations, and thick cotton gloves or magnetically shielded gloves should be worn to prevent magnetic injury. Based on industry experience, we recommend checking the magnetic strength (Gauss strength) every 6–12 months using a professional Gauss meter (Tesla meter). If the magnetic strength decreases by more than 15%, the magnetic core needs to be replaced.
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