Extraction of copper is done using copper pyrites. After roasting, the ore is mixed with silica and coke and then smelted in a blast furnace. The matte obtained from the blast furnace is charged into a silica-lined converter. Some silica is also added, and a hot air blast is blown into the mixture to obtain blister copper, which is purified by electrorefining.
Coke is added during smelting to.
A. Reduce `FeO` to `Fe`
B. Reduce `Cu_(2) O` to `Cu`
C. Check the oxidation of `FeO` to `Fe_(2) O_(3)`
D. Check the oxidation of `Cu_(2) O` to `CuO`.
