Project Description


Magnetic separation is defined as a process in which a magnetically susceptible material is extracted from a mixture using magnetic force. It is a widely adopted technique and stands as a crucial process for many industries. And permanent magnets play a key role in separating different materials.

Essentially, this method harnesses the power of magnets to distinguish iron from mixed materials. Its primary function is to isolate, extract, and enhance the quality of materials, contributing to a purer end product. And to remove iron-containing minerals from silica sand is a widely used magnetic separation example in glass production.

Magnetic separation device is often installed at critical HACCP or inspection points in the product flow. There are also many types of magnetic separation devices.

According to the properties of the material to be separated and the requirements of the specific application, iron filings magnetic separation magnet is divided into the following categories:

The magnetic component is a straightforward yet effective tool for magnetic separation. It combines multiple permanent magnets with stainless steel, creating a design that maximizes the magnetic field’s strength for a more efficient separation process.

With the increasing need for magnetic separation in production, these components have evolved from tailored solutions to a wide range of standardized series products, catering to various specific purposes and demands in the industry.

The magnetic rod has a simple structure and is mainly composed of magnets and steel tubes. Round or square tubes are available. The ends of  rod can be customizezd to a variety of styles, including threaded holes, threaded rods, flat heads, and pointed heads. Stainless steel materials include SUS304 & SUS316. The latter is more corrosion-resistant and suitable for the pharmaceutical and food industries.
The magnetic rack is a combination of several magnetic rods arranged at a certain distance. Generally designed as a single-layer or multi-layer structure. This structure forms a gradient distributed spatial magnetic field, which will greatly improve the efficiency of impurity removal. They are generally placed in places such as stockers, drawer boxes and hoppers.
The magnetic plate looks like a simple stainless-steel plate, but it is not simple at all inside. It contains a high-density magnetic field composed of powerful rare earth magnets and iron sheets. It is easy to clean and install. It is mainly used to remove nails, nuts and wires during the transportation of gravel, grain, sugar, flour, wood, minerals or other granular or lumpy materials. and other iron impurities.
Magnetic rollers are more complex magnetic components. The structure is similar to the motor magnetic shaft, but the size is much larger. The magnets are densely mounted on the outer ring surface of the magnetic shaft. The magnetic roller (magnetic drum) can use cheap ferrite permanent magnets or magnetic rare earth permanent magnets, and its magnetic field can be as high as 15000GS+.

Permanent magnet is the simplest type of magnetic separator. Its strong magnetic field can attract and separate iron-containing materials. As the material passes through the magnet, the iron impurities are attracted to the magnet, causing separation.

Different magnet materials have different properties, so selection is very important. The type of magnet material depends on the density of the product, flow rate, operating temperature, and the type of ferrous contaminant you are trying to remove.

Rare earth magnets used in permanent magnetic separators include neodymium iron boron, samarium cobalt, alnico and ferrite.

  • NdFeB magnets have the highest strength and are suitable for situations where product density and flow rate are high, as well as when weak magnetic debris and work-hardened steel are encountered.
  • Samarium cobalt and alnico magnets are weaker but can withstand higher temperatures.
  • Ferrite magnets are lower in strength but can produce a deeper magnetic field and are often used to separate miscellaneous iron with larger particle sizes. It can also withstand higher temperatures and exposure to corrosive elements.

Magnetic separation technology is a crucial element across various industries, ensuring essential purification, safety, and efficiency in production and processing.

China Magnets Source specializes in tailoring magnets and magnetic components specifically for magnetic separation purposes.

Should you have any inquiries or requirements in this field, we welcome you to reach out to us without hesitation.

Powerful Separation Magnets Available:

  • N45H Rod Magnets
  • N52 Countsunk Magnets
  • Y30BH Ceramic Block Magnet
  • N42Neodymium Rectangular/Square Magnet
  • 10000+ Gauss Food Grade Stainless Steel Magnetic Rod

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    Magnetic separation technology can handle a range of raw materials needed for production including powders, granules, liquids or pastes. It has a wide range of applications and plays an important role in many industries, including:

    • Food safety: During the processing of food products (flour, starch, sugar, chocolate, tea and cereals), magnetic separation can be used to remove metallic impurities in food to ensure that the food is purer and safer.
    • Production Safety: Magnetic separation can be used to remove iron and steel filings that may contaminate the coolant in metalworking operations, as well as protect your equipment from serious damage and keep the production lines free of hazardous metal debris.
    • Plastics Industry: Magnetic separators can protect expensive process equipment (molding tools, grinders, extruders, nozzles, mixers and rollers) from metal (nails, screws, or metal caps), thereby reducing breakdowns and increasing productivity; in addition to preventing finished products from being contaminated with iron, which can improve the purity of plastic products.
    • Glass Industry: The purity of potassium feldspar and quartz sand is related to the quality of ceramic glass and other products, so glass manufacturers will need to use magnetic separation equipment to remove iron and purify raw materials.
    • Oil and Gas Production: Magnetic separation is used to refine and purify oil and gas by removing metallic impurities.
    • New Energy Lithium Battery Production: Metal impurities can affect the discharge process of lithium batteries, which can lead to battery safety issues. Magnetic separation can remove iron impurities and magnetic substances in lithium anode slurry (e.g. lithium cobalt oxide, lithium manganese oxide, lithium iron phosphate ternary materials) to ensure the stability of lithium battery performance.
    • Recycling and Waste Treatment: Magnetic separation is used to separate and recycle metal wastes in the recycling industry of cement, aggregate, wood chips, plastics, glass, electronic wastes and so on.
    • Environmental Protection: In the environmental field, magnetic separation helps to treat pollutants and purify the environment by removing harmful metals from water or soil.