Method of production of secondary steel based on scrap

With the production of the secondary steel based on scrap, wherein the scrap is fed in a scrap preheater through a charging device, is preheated there and, finally, is brought into a smelting unit and is melted there with primary energy only, the process gases, which leave the smelting unit, are not used for directly preheating the scrap but are rather used indirectly by heating a gaseous preheatable medium, e.g., air or inert gas, so that energetic, fluidic, and spatial decoupling of preheating and melting and of post-combustion and preheating is achieved.