Bauxite Mining and Alumina Refining
May 08, 2014· Bauxite is the principal ore of alumina (Al 2 O 3), which is used to produce aluminum (Al). It is composed of hydrated aluminum oxides, hydrated aluminosilicates, iron oxides, hydrated iron oxides, titanium oxide, and silica. ... (further treatment of the ore to concentrate the minerals), but the ore in the north of Brazil and in Vietnam has a ...