Irsid and DCPR from Nancy present an investigation on the generation and the abatement of organic molecules in the flue gas of an electric arc furnace. Investigated in detail are the environmental cleanliness of scrap, the mixed pyrolysis and combustion that generates these molecules, the solution to destroy them completely that a perfect post-combustion offers, as demonstrated in the laboratory and as extrapolated for industrial scale, and the condensation of dioxines in the flue gas collection system.