Question

Which of the following statements is/are correct about the extractive metallurgy of copper?

• A. Matte chiefly consists of cuprous sulfide and some ferrous sulfide
• B. Most impurities of iron sulfide are removed as fusible slag during roasting
• C. Copper pyrite is concentrated by froth floatation
• D. Matte is transferred to a Bessemer converter for self-reduction process

Answer 1

Answer: (A), (C), (D)

The correct options are
A Matte chiefly consists of cuprous sulfide and some ferrous sulfide
C Copper pyrite is concentrated by froth floatation
D Matte is transferred to a Bessemer converter for self-reduction process

a) Matte chiefly consists of cuprous sulfide and some ferrous sulfide.
b) Most impurities of iron sulfide are removed during smelting as $FeSi{O}_3$.
c) The copper pyrite ($CuFe{S}_2$) is concentrated by froth floatation process as it is a sulphide ore.
d) Matte is transferred to Bessemer converter for self-reduction process. Copper metal is extracted from molten matte through bessemerization