what is extraction of aluminium' s steps involved
Answers
Explanation:
What are the steps involved in the extraction of aluminium frm bauxite??? The extraction of aluminium from bauxite basically involves two main steps : 1) Concentration of bauxite by leaching. 2) Electrolytic reduction of purified Al2O3.
Answer:
Aluminium Extraction:
● Aluminium is the most abundant (found in large quantities) metal in the Earth's crust. It is expensive, largely because of the amount of electricity required in the extraction process.
● Aluminium ore is called bauxite. The bauxite is purified to produce aluminium oxide, a white powder from which aluminium can be extracted.
● The extraction is done by electrolysis. The ions in the aluminium oxide must be free to move so that electricity can pass through it. Aluminium oxide has a very high melting point (over 2000°C) so it would be expensive to melt it. Aluminium oxide does not dissolve in water, but it does dissolve in molten cryolite. This is an aluminium compound with a lower melting point than aluminium oxide. The use of cryolite reduces some of the energy costs involved in extracting aluminium.