Alcoa Corporation is a vertically integrated aluminum company, which is engaged in bauxite mining, alumina refining, aluminum production (smelting and casting) and energy generation. Its Alumina segment consists of its worldwide refining system, which processes bauxite into alumina. The alumina produced by this segment is sold to internal and external aluminum smelter customers; a portion of the alumina is sold to external customers who process it into industrial chemical products. Its Aluminum segment consists of worldwide smelting and cast house system, which processes alumina into primary aluminum, and portfolio of energy assets in Brazil, Canada and the United States. Its smelting operations produce molten primary aluminum, which is then formed by the casting operations into either common alloy ingot or into value-add ingot products. It owns and controls Alcoa World Alumina and Chemicals joint venture that owns, operates or has an interest in bauxite mines and alumina refineries.