Q12 of 50 Page 1

Why is copper matte put in the silica lined converter? Write reactions involved

Copper Matte contains a small amount of Ferrous oxide which acts as an impurity and it can be removed by passing the copper matte through silica lined converters and in these converters Ferrous Oxide reacts with the silica to form slag and thus it is separated from copper. The reaction involved are as follows:

2Cu2S + 3O2→ 2Cu2O + 2SO2


3FeS + 3O2→ 2FeO + 2SO2


FeO + SiO2 → FeSiO3 (slag)


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