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Question
Describe the role of Graphite in the extraction process of aluminium.
Describe the role of Graphite in the extraction process of aluminium.
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Solution
- During the electrolysis of alumina, a Graphite rod is used as an anode and graphite line iron as a cathode.
- In this process, aluminium is liberated at the cathode and oxygen at the anode.
- This oxygen reacts with the graphite anode to form CO and CO2 preventing the oxygen evolved from oxidizing aluminium.
- Thus the role of graphite in the electrometallurgy of aluminium is to prevent the liberation of oxygen so that the aluminium is not oxidized by oxygen.
- During the electrolysis of alumina, a Graphite rod is used as an anode and graphite line iron as a cathode.
- In this process, aluminium is liberated at the cathode and oxygen at the anode.
- This oxygen reacts with the graphite anode to form CO and CO2 preventing the oxygen evolved from oxidizing aluminium.
- Thus the role of graphite in the electrometallurgy of aluminium is to prevent the liberation of oxygen so that the aluminium is not oxidized by oxygen.
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