PROCESS AND APPARATUS FOR RECOVERY OF NON-FERROUS METALS FROM ZINC RESIDUES

摘要

The invention relates to a process for the separation and recovery of non- ferrous metals from zinc-bearing residues, in particular from residues produced by the zinc manufacturing industry. The process comprises the steps of: - subjecting the residue to a flash or agitated bath fuming step, thereb y producing an Fe bearing slag and Zn- and Pb-bearing fumes; and - extracting the Zn- and Pb-bearing fumes and valorising Zn and Pb; characterised in that CaO, SiO2 and MgO are added as a flux before or during the fuming step so as to obtain a final slag composition with: formula (I) all concentrations bein g expressed in wt%. The invention also relates to a single-chamber reactor for Zn-fuming equipped with one or more submerged plasma torches as heat and gas sources.