Aluminium Electro Metallurgy Quiz

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Explain the process of extracting aluminium through electro metallurgy.

Aluminium is extracted through the Hall-Heroult process using an iron cathode coated with carbon, a carbon anode, and an electrolyte of calcium chloride, alumina, and cryolite at a temperature of 1270K. The ionization of aluminia occurs as Al2O3  2 Al3+ + 3O2. At the cathode, the reaction is 2Al3+(melt) + 6e  2Al(l), and at the anode, it is 6O2- (melt)  3O2+ 12e. The net electrolysis reaction is 4Al3+(melt) + 6O2- (melt) + 3C(s)  2Al(l) + 3CO2(g).

Define 'gangue' and provide an example.

Gangue refers to the nonmetallic impurity associated with ore. An example is SiO2.

Explain the concept of 'slag' with an example reaction.

Slag is the fusible product formed when flux reacts with gangue. An example reaction is CaO + SiO2  CaSiO3, where SiO2 is the gangue, CaSiO3 is the slag, and CaO is the flux.

What are the basic requirements for vapor?

<p>The basic requirements for vapor include a suitable temperature for vaporization, presence of the substance in a gaseous state, and sufficient space for expansion and diffusion.</p> Signup and view all the answers

What are the raw materials and conditions required for the extraction of aluminium through the Hall-Heroult process?

<p>The raw materials required are alumina, calcium chloride, and cryolite, along with an iron cathode coated with carbon and a carbon anode. The extraction process occurs at a temperature of 1270K.</p> Signup and view all the answers