Answer. In the bessemerization process molten matte is further heated. Molten matte is mixed with sand and heated with a hot blast of air through tuyers. Ferrous sulphide is oxidized to form ferrous oxide. Which react with sand to form slag (FeSiO3) that float on the top.
2FeS(1) + 3O2(g) 2FeO2(g) + 2SO2(g)
FeO(1) + SiO2(1) FeSiO3(slag)
On the other hand, cuprous sulphide is oxidized to form cuprous oxide, which again reacts with remaining cuprous sulphide to form metallic copper.
2Cu2S(1) + 3O2(g) 2Cu2O(1)+ 2SO2(g)
2Cu2O(1) + Cu2S(1) 6Cu(s)+ SO2(g)