What is composition of Wrought Iron ?

Wrought iron:

Wrought is made by heating cast iron with haematite (Fe₂O₃) which oxidises C to CO, S to SO₂ Si to SiO₂, P, P₄O₁₀ and Mn to MnO . Where CO and SO₂ escapes, manganese oxide (MnO) and Silica (SiO₂) combine to form slag.

Similarly phosphorus pentoxide combines with haematite to form ferric phosphate slag.