How is copper extracted from its sulphide ore explain the various steps supported by chemical equations draw labelled dia gram for the electrolytic refining of copper with answer
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The process
The concentrated ore is heated strongly with silicon dioxide
(silica), calcium carbonate and air or oxygen in a furnace or series of
furnaces.
The copper(II) ions in the chalcopyrite are reduced to copper(I)
sulphide (which is reduced further to copper metal in the final stage).The iron in the chalcopyrite ends up converted into an iron(II) silicate which is removed.Most of the sulphur in the chalcopyrite turns into sulphur
dioxide gas. This is used to make sulphuric acid via the Contact
Process.Much like in the Blast Furnace, the calcium carbonate is involved in the production of the waste
An overall equation for this series of steps is:2CuFeS2 + 2SiO2 +4O2⇒ Cu2S + 2FeSiO3 + 3SO2
The copper(I) sulphide produced is converted to copper with a final blast of air. Cu2S + O2 ⇒ 2Cu + SO2
An overall equation for this series of steps is:2CuFeS2 + 2SiO2 +4O2⇒ Cu2S + 2FeSiO3 + 3SO2
The copper(I) sulphide produced is converted to copper with a final blast of air. Cu2S + O2 ⇒ 2Cu + SO2
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by roasting it
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