2020 Volume 60 Issue 9 Pages 1863-1871
Recovery of multisource metallurgical wastes can facilitate the recovery of valuable metals, and achieve the full utilization of slag. Recycling nickel slag by aluminum dross with converter-slag addition was studied. Based on the element mapping of slags, mineral phases in the modified slag were reconstructed under the interaction of nickel and converter slags, and ‘FeO’ could be separated from the relevant structures of the two slags. Element mapping and chemical analysis of the metal phase after reduction indicated that the reduced product was Fe–Cu-based alloy, element mapping and XRD detection of the secondary slag indicated a complex characterization. The influence of factors, including the basicity of the modified slag, the reduction temperature and the Al/‘FeO’ ratio on the recovery degree of Fe, Cu, Mn and P, was discussed and the optimal technical parameter was determined as 1.0, 1773 K and 0.67, respectively.
