General Purchase Engineer Trainee Interview Questions and Answers

Aluminium extraction involves the process of electrolysis of alumina (Al2O3) dissolved in molten cryolite.

• Bauxite ore is first mined and purified to obtain alumina (Al2O3).

• Alumina is dissolved in molten cryolite to lower its melting point.

• The mixture is then electrolyzed using carbon electrodes to extract pure aluminium metal.

• The aluminium metal is then processed further to obtain the desired form (ingots, sheets, etc.).

Ore is a naturally occurring solid material from which a metal or valuable mineral can be extracted, while mineral is a naturally occurring inorganic solid substance with a specific chemical composition and structure.

• Ore is a type of mineral that contains a high enough concentration of a particular element, such as iron ore containing iron.

• Minerals are naturally occurring substances with a specific chemical composition and structure, such as quartz or feldspar.

• Ores are econom...read more