This document discusses magnetic separators, including their working principles, construction, types, and industrial applications. Magnetic separators use magnetic fields to remove magnetic materials from a feed or concentrate ore by exploiting differences in magnetic properties. Common types include drum magnets, which are used in industries like sugar, cement, and chemicals to remove fine iron; plate magnets, which remove tramp iron from glass, food, and textile industries; and pipeline magnets, which purify liquid lines. Magnetic separators have a variety of industrial uses including product purification and protecting downstream equipment from magnetic contamination.