PROCESS AND DEVICE FOR HYDROMETALLURGICAL TREATMENT OF METALLURGICAL DUST

摘要

Method and device for hydrometallurgical treatment of metallurgical dust by acid leaching followed by solid-liquid separation. The invention is characterized in that the leaching phase takes place by moderate acid attack (end-of-reaction pH close to 4 or 5) and in that an additional step of solids solid separation is carried out either before the operation solid-liquid, either after. The invention applies to all dust from metal treatments, in particular steel dust and, in particular, from blast furnaces, of which it allows the separation and recovery of the useful elements contained therein, such as iron, zinc and lead.