Concept explainers
Interpretation:
The energy efficiency of aluminum recycling needs to be explained and demerits of the large energy requirements of aluminum production from scratch needs to be explained.
Concept introduction:
The two main processes required from the extraction of aluminum from its ore are Bayer process and Hall Heroult process.
Explanation of Solution
The preparation of aluminum from scratch is a very extensive and energy consuming process, whereas in the recycling process of aluminum about 95% less energy is required as compared to fresh production. The production of new aluminum involves molten alumina which has a very high melting point whereas in the recycling of aluminum molten aluminum is involved which has a lower melting point and therefore requires less energy.
The recycling of aluminum is a simpler method than preparing fresh aluminum therefore it requires less energy.
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