Question

Copper Matte is extracted from copper pyrites ore by' heating it in blast furnace. The method is based on the principle that:

• A. copper has more affinity for oxygen than sulphur at high temperature
• B. iron has less affinity for oxygen than sulphur at high temperature
• C. sulphur has less affinity for oxygen at high temperature
• D. copper has less affinity for oxygen than sulphur at high temperature

Answer 1

Answer: (D)

$2CuFeS_{2} + O_{2} \to Cu_{2}S + 2FeS + SO_{2}$
$FeS+\frac{3}{2} O_{2} \to FeO + SO_{2} \uparrow$
$FeO + SiO_{2} \to FeSiO_{3}$
(Remain $Cu_2S$ is called matte)