An alumina refinery is a facility that processes bauxite ore to produce alumina, a key ingredient in aluminum production. The refining process typically involves crushing the bauxite and using a chemical method called the Bayer process, which separates alumina from impurities. This results in a white powder that can be further smelted to create aluminum metal. Alumina refineries are often located near bauxite mines to reduce transportation costs. The production of alumina is essential for industries that rely on aluminum, including automotive, aerospace, and construction. The environmental impact of these refineries is a significant concern, leading to ongoing efforts to improve sustainability practices.