Question

compare between these three in term of economic impact:
1- aluminium extract from it's ore bauxite.
2- recycled aluminium from new scrap
3- recycled aluminium from old scrap

Answer 1

Aluminium a abundant metal on the earth though a expensive because of the process of extraction from Bauxite & Recycled. Recycling aluminum saves more than 90 percent of the energy costs required in primary production & it is 100%

1.Aluminium extract from its ore bauxite: Bauxite, is the only ore that is used for commercial extraction of aluminium today because of it contains15-25 percent aluminium which contains aluminous minerals such as gibbsite, bohemite and diaspore. following are the impact of extracting aluminium from bauxite,

• Lot of Electricity is required for the process & requires own power plant
• Frequently changing the anodes used in the process
• Noise & Air pollution
• Disposal of left over bauxite

There are two categories of aluminium destined for recycling: Old & New

2. Recycled Aluminium from new Scrap: New scrap is surplus material that arises during the manufacture and fabrication of aluminium alloys within the aluminium recyclable. Examples include the trimmings from the edges of sheet aluminium, turnings and millings from aluminium fabrication and surplus extrusion discards. Following are the economic impact,

• New Scrap usually melted down with little preparation
• Environmental benefits in terms of land savings
• Reduced wastege level
• Reduced Emissions
• Driving economy forward
• dsd

3. Recycled aluminium from old scrap:Sorting of old Scrap at plant & recycled in a open loop.Heavy media separation have been developed to extract aluminium from mixed waste streams and an automatic sorting of aluminium alloys takes place in the process, following are the economical impact of the process:

• Economical
• reduces wastage & emmissions