The primary source of aluminum is which mineral?

The primary source of aluminum is which mineral?

• A. Bauxite
• B. Hematite
• C. Magnetite
• D. Limestone

Answer: (A)

Aluminum is obtained mainly from bauxite ore, which is rich in aluminum oxide minerals such as gibbsite, boehmite, and diaspore. After mining, bauxite is processed via the Bayer process to yield alumina (Al2O3), which is then electrolytically reduced in the Hall–Héroult process to produce aluminum metal. The other minerals listed aren’t sources of aluminum: hematite and magnetite are iron ores, and limestone is calcium carbonate used as a flux in some smelting processes, not a primary aluminum source.

Aluminum is obtained mainly from bauxite ore, which is rich in aluminum oxide minerals such as gibbsite, boehmite, and diaspore. After mining, bauxite is processed via the Bayer process to yield alumina (Al2O3), which is then electrolytically reduced in the Hall–Héroult process to produce aluminum metal. The other minerals listed aren’t sources of aluminum: hematite and magnetite are iron ores, and limestone is calcium carbonate used as a flux in some smelting processes, not a primary aluminum source.