Numerical Calculations of Spray Roasting Reactors of the Steel Industry with Special Emphasis on Fe 2 O 3 ‐Particle Formation

This work presents numerical calculations for the lay‐out of spray roasting reactors for the steel industry. In these reactors, a pickling liquor based on water and HCl containing FeCl 2 is regenerated in a combustor leading to the formation of Fe 2 O 3 particles. For the lay‐out of these reactors, detailed knowledge of the flow and temperature field, the associated gas phase reactions, and especially, of the formation of the Fe 2 O 3 particles is required. An extended particle formation model is presented which is based on earlier work. Finally, results for an industrial spray roasting reactor are given showing the potential of the numerical tools developed for the improvement of the technical lay‐out of such thermal reactors. Numerical calculations for the lay‐out of spray roasting reactors for the steel industry are presented. A pickling liquor based on water and HCl containing FeCl 2 is regenerated in a combustor leading to the formation of Fe 2 O 3 particles.