In the production of new energy materials, the strong magnetic iron-removal rods demonstrate excellent performance in adsorbing fine iron filings, which is mainly reflected in the following aspects:

1. High Magnetic Field Strength

Strong magnetic iron-removal rods are typically made from high-performance neodymium-iron-boron (NdFeB) permanent magnetic materials. These materials possess extremely high magnetic energy and coercivity, capable of generating a magnetic field strength as high as 12,000 - 16,000 Gauss. Under such a powerful magnetic field, even fine iron filings with diameters of just a few micrometers are attracted by the strong magnetic force and are adsorbed onto the surface of the magnetic rod. Experimental data shows that in a magnetic field environment of 13,000 Gauss, the adsorption force of a strong magnetic rod on 5μm iron particles can exceed 1,000 times their own weight.

2. Optimized Structural Design

The structural design of strong magnetic rods further enhances their ability to adsorb fine iron filings. Magnetic rods with a multi-layered magnet structure can effectively increase the magnetic field gradient, thereby improving the adsorption effect on fine iron filings. The outer layer of low-coercivity magnets first adsorbs larger iron filings, while the inner layer of high-coercivity magnets is responsible for capturing finer iron filings. This design can increase the adsorption efficiency of iron filings smaller than 1μm by about 20%. In addition, thinner magnetic rods can produce a more concentrated magnetic field, which is more advantageous for adsorbing fine iron filings.

3.Practical Application Effects

The application of strong magnetic rods in the production of new energy materials has shown significant results. For example, in the production process of silicon-carbon anode materials, by arranging strong magnetic rods in the material conveying pipeline to form an iron-removal device, fine iron filings in the raw materials can be effectively adsorbed, reducing the iron impurity content from an initial 20ppm to below 5ppm. In the grinding process of lithium iron phosphate cathode materials, using a strong magnetic rod with a diameter of 10mm, combined with an appropriate magnetic circuit design, can achieve a magnetic field strength on the surface of the magnetic rod of over 13,000 Gauss, effectively adsorbing fine iron filings generated during the grinding process.

4. Surface Treatment and Maintenance

The surface treatment process of strong magnetic rods is equally important. To prevent corrosion of the magnetic rod during use and to avoid difficulties in cleaning the adsorbed iron filings, the surface of the magnetic rod is usually treated specially, such as being covered with a stainless steel sleeve or food-grade plastic. This surface treatment does not affect the magnetic performance of the magnetic rod, but it can protect the service life of the rod and ensure that its ability to adsorb fine iron filings remains stable over the long term. Regular cleaning and maintenance of the strong magnetic rod are also crucial. Through reasonable maintenance measures, the magnetic rod can maintain good adsorption performance continuously.