Why copper matte is put in silica lined converter?
Copper matte contains Cu2S and FeS. Hot air blast converts FeS to FeO. FeO is removed as slag when it reacts with silica. Hence, copper matte is placed in silica lined converter. 2FeS+O2→2FeO+2SO2 FeO+SiO2→FeSiO3 Cu2S or CuO is converted to copper. 2Cu2S+3O2→2Cu2O+2SO2 2Cu2O+Cu2S→6Cu+SO2
