Industrial production of aluminium from bauxite and recycling Essay

Industrial production of aluminium from bauxite and recycling - Essay ExampleThe following work serves to outline the processes involved in extraction of aluminum from bauxite ore and further details more on aluminum recycling in the United Arab Emirates.The initial step in aluminum manufacture involves the mining of bauxite through the open cast technique. This mined bauxite is crushed and because washed to remove the mud and new(prenominal) dirt that may be attached. Having done this, the washed bauxite is taken through the purification process besides called the Baeyers Process.The Baeyers process success follow the idea acidity of silicon dioxide oxide, basicity of iron oxide and titania and the fact that aluminium oxide is amphoteric. Here, the crushed ore mixes with sodium hydroxide (NaOH) or caustic soda to make a solution that is then heated. Following this process the alumina together with silica that in the form of reactive crystalline are dissolved, a process that leaves the iron oxide, titania and large percentage of silica that is already mixed with some other elements. At this point filtration is done to separate the dissolved elements from the remaining residue.Following the cooling of the alumina and silica solution, a complex alluminosilicate or sand is precipitated out first before altering the process, a circumstance that allow crystallization of pure aluminum hydroxide. To speed up this process, a small amount of crystalline hydroxide, which is in its pure form, is added to act as an area where the crystal develops.The uncontaminated aluminum hydroxide crystals Al (OH)3. 3H2O are then heated in an increasingly heated furnace until the temperature is 1100o C, a factor that causes them to decompose and therefrom form alumina (Al2O3) and water.Since alumina is covalently bonded, the electrolysis process can only be achieved when presented in an ionic form. To embody this, the alumina is dissolved in an electrolyte, which in this cas e is a mixture formed from molten