Different ways of manufacturing aluminum Research Paper

Different ways of manufacturing aluminum - Research Paper Exampleminum has thousands of variant applications particularly in construction and manufacturing sectors and more than 10 billion pounds of aluminum are produced worldwide per annum (Lindamood n. d.).The most commonly found aluminum ore bauxite is a mineral of aluminum (Al) and hydroxyl (OH) with very substantial covalent bounding between oxygen and aluminum. Hence on large scale, it is not possible to directly put forward Al from its ore by simple chemical make. The separation is carried out with various indirect methods. The manufacturing of complete(a) aluminum (lxx.x, 99.00% or greater) from its ores is done through following process as given below.Also cognize as ore separation/purification process is invented by an Austrian chemist Carl Josef Bayer while on the job(p) at Saint Petersburg, Russia. In this process, after mining, the ore is mechanically crushed into very pretty granular form. The fine powdered or e is then mixed in hot caustic soda liquor (NaOH) at 110-270C under 340 kPa Pressure to produce slurry of liquidness. After several hours of process NaOH completely dissolves the Al. The liquid is then passes through a series of flash tanks to reduce the pressure and to recover the heat. The mixture is separated from its solid impurities by passing it through a settling tank and through filtration process. The saturated aluminum rich liquid passes through a series of six-story-tall precipitation tanks (Hall 1997). As the liquid propagates through each tank, seed aluminium oxide hydrate crystals are also added from the top of each tank. The aluminum trihydrate crystals grows in size and precipitated calcined in band kilns or fluidized bed calciners to produce alumina (Al2O3) (Aluminum Manufacturing 1998 pp.261).The crystals obtained through kiln are cool down and proceed to smelting process.In Hall-Heroult Process also known as smelting processing the alumina crystal abstained thro ugh Bayer process is further dissolved in molten cryolite at a temperature of 960-970 C