Companies that operate an aluminum smelter, refine alumina (i.e aluminum oxide) from bauxite, make aluminum from alumina, roll, draw, extrude, or cast aluminum into primary forms (bars, billets, ingots), recover aluminum from scrap or dross and flat roll into sheets or plates.
Companies that smelt and refine metals from ore or scrap, and make aluminum, non-metallic mineral, precious metal, steel, and other metal products.
Companies that engage in mining, mine site development, and preparing metallic minerals and nonmetallic minerals (including companies that operate mines and quarries for themselves or for others on a contract basis, companies that engage in quarrying, crushing, screening, washing, sizing, concentrating, and flotation of metals and nonmetallic minerals, and companies that provide support services for the mining industry).
Companies that explore, develop, mine, and process industrial metals (including Iron, Copper, Nickel, Lead, and Zinc) and companies that provide industrial metals preparation and support services to industrial metals mining companies (such as screening, washing, sizing, and concentrating industrial metals).
Companies that engage in mining, mine site development, and preparing metallic and nonmetallic minerals. The industry includes companies that operate mines and quarries for themselves or for others on a contract basis.