CameraIcon
CameraIcon
SearchIcon
MyQuestionIcon


Question

Which of the following statements is incorrect about the extractive metallurgy of copper?
 


Your Answer
A
Matte formed after smelting chiefly consists of cuprous sulfide and a bit of ferrous sulfide.
Correct Answer
B
Most of the SiO2 impurity is removed as fusible slag during roasting which combines with flux FeO.
Your Answer
C
The copper pyrites are concentrated by the froth floatation process.
Your Answer
D
FeS as an impurity is roasted to FeO which reacts with flux SiO2 to form slag FeSiO3 in the blast furnace during smelting and in a Bessemer Converter during self reduction.

Solution

The correct option is B Most of the SiO2 impurity is removed as fusible slag during roasting which combines with flux FeO.
a) In Bessemerisation, molten matter (a mixture cuprous sulfide and ferrous sulfide) called matte is reduced and obtained after the smelting of copper pyrites in a Bessemer converter.
b) FeS is present as an impurity which is roasted to FeO which combines with SiO2 as flux to form slag as FeSiO3. Thus, (d) is correct, b) is not.
c) Copper pyrites (CuFeS2) is a sulfide ore. Thus, froth floatation is used for the concentration of the ore.
Hence, the incorrect option is (b)

flag
 Suggest corrections
thumbs-up
 
0 Upvotes


Similar questions
View More


People also searched for
View More



footer-image