Permanent magnetic filter grates are tried and tested units in separation and filter technology for separating ferrous impurities from granular, liquid and gaseous media. Their simple design and reliable, maintenance-free operation have made them indispensable in many industries. As separating units for the separation of magnetic impurities from granular bulk materials, they are used in such areas as feed production for the separation of ferrous parts including bag closures, wires, screws, assembly materials, etc., in the plastics industry to remove fine and coarse iron from high-quality granulates, upstream of mills to remove foreign iron from grain (rye, wheat, maize, etc.) and to protect all crushing and grinding plants for other goods too, and for separation from viscous masses and slurries, e.g., in the food, chemical and ceramics industries. Permanent magnetic filter grates can be used in material discharge downstream of belts, vibrating chutes, elevators, etc., or in open and closed chutes, gutters, shafts, pipes, etc., in single, rear or stacked double or multiple arrangements depending on the desired degree of separation.