MetallurgyHard
Question
Which of the following process(es) occur(s) during the extraction of copper from chalcopyrites ?
Options
A.Froth floatation
B.Roasting
C.Bessemerisation
D.calcination
Solution
(A) Sulphides ores are generally concentrated by froth floatation.
(B) 2CuFeS2 + 4O2
Cu2S + 2FeO + 3SO2
Cu2S + FeO + SiO2 → FeSiO3 (fusible slag) + Cu2S (matte)
(C) Bessemerisation
2FeS + 3O2 → 2FeO + 2SO2
FeO + SiO2 → FeSiO3
2Cu2S + 3O2 → 2Cu2O + 2SO2
2Cu2O + Cu2S → 6Cu + SO2 (self reduction).
(B) 2CuFeS2 + 4O2
Cu2S + 2FeO + 3SO2Cu2S + FeO + SiO2 → FeSiO3 (fusible slag) + Cu2S (matte)
(C) Bessemerisation
2FeS + 3O2 → 2FeO + 2SO2
FeO + SiO2 → FeSiO3
2Cu2S + 3O2 → 2Cu2O + 2SO2
2Cu2O + Cu2S → 6Cu + SO2 (self reduction).
Create a free account to view solution
View Solution FreeMore Metallurgy Questions
Which of the following metals is obtained by the self reduction process?...During initial treatment, preferential wetting of ore by oil and gangue by water takes place in...A metal has a high concentration into the earth crust and whose oxides cannot be reduced by carbon. The most suitable me...Zone refining is used for purification of...An non-magnetic ore containing the impurity of FeCr2O4 is concentrated by...