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Asked: 2020-03-14T04:10:48+05:30 In:

GATE MT 2011 Q16. Aluminium is NOT commercially produced by carbo-thermic reduction primarily because of:

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11.11%(A) aluminium metal will have excess dissolved oxygen ( 1 voter )
11.11%(B) it melts at too low a temperature ( 1 voter )
0%(C) it does not vaporize at reasonable temperatures
77.78%(D) (D) Al-Al2O3 line is too low in Ellingham diagram and needs excessively high temperatures ( 7 voters )
Based On 9 Votes

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GATE MT 2011 Q16. Aluminium is NOT commercially produced by carbo-thermic reduction primarily because of:
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    2 Answers

    1. Platinum GATE Metallurgy Coaching |Providing Video Solutions and Concepts of Metallurgy since 2016 | Follow our channel, "C Patel Metallurgy" on Youtube for your GATE preparation

      Option D is correct. Since Al-Al2O3 line is very low the temperature of this reduction is very high about 2000 C

      Option D is correct. Since Al-Al2O3 line is very low the temperature of this reduction is very high about 2000 C

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      Correct answer is option D. Excessively  high temperature is not favourable for refractories  and also commercially not economical process.

      Correct answer is option D.

      • Excessively  high temperature is not favourable for refractories  and also commercially not economical process.
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