A magnetic separator is a device used to separate magnetic materials from non-magnetic ones in various industries. It works by generating a magnetic field that attracts ferrous materials, allowing them to be removed from a mixture. This process is essential in recycling, mining, and food processing to ensure product purity and protect equipment. These separators come in different types, including overband, drum, and magnetic pulleys, each designed for specific applications. They are commonly used to remove contaminants like metal shavings, nails, and screws from materials such as plastics, grains, and ores, enhancing the quality of the final product.