The extraction of aluminium involves two steps that is purification of bauxite by baeyer s process and electrolysis of alumina. It is the most abundant metal in the earth s crust as it makes up 8 of the crust and it is the third most abundant element after oxygen and silicon.

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It involves two steps.

The extraction of aluminium. Bauxite ore al2o3 xh2o is the major source of aluminium till date which is a mixture of hydrated aluminium oxide. The extraction of aluminium from its ore involves following steps. First of all aluminum oxide needs to be in molten form to extract the aluminum ions.

Purification of bauxite by baeyer s process. In the baeyer s process the bauxite ore is heated with concentrated naoh solution under pressure aluminum is purified by leaching method. The temperatures needed are too high to be economic.

Instead it is extracted by electrolysis. Mostly aluminium is extracted from its ore called bauxite. Aluminium is then extracted from aluminium oxide by electrolysis.

Metallurgy of aluminium or extraction process of aluminium from its ore involves various methods. Therefore aluminum oxide is dissolved in molten cryolite. Aluminium oxide has a very high melting point over 2000 degrees celsius.

The science of extracting pure metals by economically effective methods from their ores is called metallurgy. Extracting aluminium aluminium is the most abundant metal on earth but it is expensive largely because of the amount of electricity used in the extraction process. Aluminum oxide however has a high melting point.

The aluminium oxide must be made molten so that the ions can pass through it during electrolysis. Aluminium ore is called bauxite. So instead of trying to melt it the aluminium oxide is dissolved in molten cryolite.

Aluminium is too high in the electrochemical series reactivity series to extract it from its ore using carbon reduction. Aluminium is normally extracted from bauxite ore al2o3. Extraction of aluminium a soft silvery white corrosion resistant metal.

Aluminum is extracted from aluminum oxide by a process called electrolysis. 1 purification of bauxite 2 electrolysis of alumina.