Aluminium Electro Metallurgy Quiz

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).

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

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.

<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

<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