Question

Extraction of copper from copper pyrite $(CuFe{S}_2)$ involves

• A. crushing followed by concentration of the ore by froth-flotation
• B. removal of iron as slag
• C. self-reduction step to produce 'blister copper' following evolution of $S{O}_2$
• D. refining of 'blister copper' by carbon reduction

Answer 1

Answer: (A), (B), (C)

Extraction of $Cu$ from copper pyrites $\left(CuFe{S}_2\right)$ involves.
$\to$ Crushing followed by concentration of the ore by froth flotation
$\to$ removal of iron as slag
$FeO+\underset{\text{acidic flux}}{Si{O}_2}⟶\underset{\text{Slag}}{FeSi{O}_3}$
$\to$ Self-reduction step to produce 'blister copper' following evolution of $S{O}_2$,
$C{u}_{2}S+2C{u}_{2}O⟶\underset{\text{bliscer copper}}{6Cu}+S{O}_2\uparrow$