High-strength rare-earth magnets form the core of magnetic rods and magnetic grids. Adopting optimized magnetic circuit layout, these magnets produce ultra-strong and uniform magnetic flux, achieving efficient adsorption of fine iron impurities and metal contaminants. Excellent anti-demagnetization performance ensures long-term stable magnetic strength under high temperature and continuous working conditions. Featuring simple structure, high filtration efficiency and zero energy consumption, magnetic rods and grids are widely applied in plastic, food, chemical and powder processing purification systems.