The magnetic bar utilizes rare earth permanent magnet steel as its magnetic source, is encased in high-quality 304 or 316L seamless stainless steel tubing, and is welded and sealed at both ends. Its powerful magnetic force separates fine ferromagnetic impurities from various powders, granules, and slurries, improving material purity, ensuring equipment integrity, and enhancing product quality. The magnetic bar can be fixed individually to feed ports, discharge ports, or conveyor pipelines, or it can be used in complete sets of magnetic screens, drawer-type iron removers, fluid iron removers, and rotary iron removers.