Refractories are materials that can withstand high temperatures without melting or breaking down. They are essential in industries that involve extreme heat, such as metal production, glass manufacturing, and cement making. Common refractories include fireclay, silica, and magnesia, which are chosen based on their thermal properties and chemical resistance. These materials are used to line furnaces, kilns, and reactors, providing insulation and protecting equipment from heat damage. Refractories help improve energy efficiency and ensure the safety and longevity of industrial processes. Their ability to endure harsh conditions makes them vital for many manufacturing operations.