Aluminum is an inorganic metal. Aluminium as a metal has many advantages than disadvantages. It is the third most common element in the world. Below is information about this metal.
Things Containing Aluminium
- Hot water
- Acidic fruits like lemons and oranges.
Impurities In Aluminium
Aluminium is not a pure metal. It contains Iron ii oxide, lead and Silicon iv oxide as impurities. However, in order to increase the purity of this metal, you can add a lot of water to the metal. Then, add oil and pass oxygen over the mixture. Finally, filter the mixture. These impurities will settle down at the container and your filtrate will have very few impurities.
The chief ore of aluminium is bauxite. Its extraction is through a chemical process. The below process explains the whole process.
- Crush and grind the bauxite
- Mix the crushed products with sodium aluminate and let the solution cool. Cooling allows the sodium aluminate to precipitate.
- Settle and vacuum-filter to enable this solid to be separated from caustic soda.
- Wash the solid formed.
- Dry and heat the solid at high temperatures so as to remove any liquor.
Electrolysis Of Aluminium
When the above steps are followed, your final product will be a white powdery substance called alumina. The next process that follows is electrolysis and is done by emerging two metals as your electrodes in a solution of aluminium sulphate which now acts as your electrolyte. One electrode is the anode while the other one is the cathode. Positive charged ions present in the liquid are attracted to the cathode and negative charged ions are attracted to the anode.
In this process, the electrolyte is placed in a pot lined with graphite. The pot act as the cathode and the carbon immersed in the electrolyte acts as the anode. Alumina is dissolved in cryolite at very high temperature of 1,000 degrees C to form a molten solution. The aluminium formed is collected from the bottom of the furnace through a plug. We currently use aluminum from this website.
Advantages Of Aluminium
Some of the advantages of aluminium as an element include:
- Can be used to make many products.
- Products are protected from rust due to the aluminium oxide layer.
- Aluminium products are cheap
- Its products are durable
- Aluminium products are light but have good strength.
- Aluminium products are flexible in terms of shape and size.
- It can be used for thermal and electrical conductivity.
- Its products can adapt to high temperatures.
Uses Of Aluminium
Some of the products made from aluminium include:
- Electrical cables
- Iron sheets
- Kitchen utensils
Aluminium can also be used to form ingots such as the fabricated and foundy ingots