Process and apparatus for the preparation of iron oxides from solutions containing hydrochloric acid iron oxide chloride

摘要

Iron oxides can be produced from HCl solutions containing iron chloride by spraying the solution into a reaction chamber (8) directly heated by a combustion chamber (9). In addition to the discharged iron oxide (7), the HCl is recovered from an exhaust gas line (16). Downstream from the burner surface (9), the spray roasted iron oxide granulate is cooled to < 450 degrees C by the introduction of cold gas (6) and then discharged (4). Also claimed is iron oxide produced by such a process. A further claim is for an apparatus for carrying out such a process in which a cold zone (5) is created between the burner surface (9) and the discharge device (4) for the iron oxide granulate.