How do you extract aluminum from aluminum oxide?

Answer 1

You need to pass an electric current throguh the molten aluminum oxide which is the ore for alumium and then u get pure aluminum at the bottom because its denser than aluminum oxide. Carbon dioxide is produced as well because the metals used to pass the electric current are carbon and the ocsigen reacts with the carbon to create carbon dioxide.

Answer 2

You extract aluminum from the aluminum oxide itself which has been dug up from the ground using special hgh - tech digging machines by heating the aluminum oxide for up to 200000 degrees celsius and then adding a 1000 volt electric current into it to separate them both. Although this process costs 5bn, its very usefull.

Aluminium is extracted from it's ore by electrolysis. The electrolyte has to be molten ore, if a solution was used (as in the extraction of copper) hydrogen gas would be produced instead of the pure metal.

The next problem lies in that aluminum ore, bauxite, has a very high melting point - over 2000 degrees Celsius! Huge amounts of energy would be needed to melt it. However, by adding a little of another less common ore, cryolite, the melting opint reduces to 950 degrees Celsius.

The electrodes are made of carbon, with the positive anodes being inserted into a carbon tank which is the negative cathode. The bauxite and cryoltie mixture is melted and a huge current is passed through it. The positively charged aluminum ions are attracted to the tank, where they make a layer of molten aluminum.

At the anode, oxygen is formed. This reacts with the carbon anodes to make carbon dioxide, and eventually wears away the anodes so they need to be replaced.

The layer of molten aluminum is tapped off into large crucibles.

Aluminium is still very expensive to extract, which is why it is important to recycle aluminum cans etc, to save on the huge amount of energy needed to extract more.

Answer 3

you need to remove from earth by mining and then is purified to alumina (aluminium oxide) and the metal is finally obtained after electrolysis in a cryolite solution.