Thermal treatment of dusts from non ferrous metallurgical industries

Three samples of dusts generated by the non ferrous metallurgical industrie s are treated between 200 and 800 degrees C in controlled oxidizing and red ucing atmospheres. The objective of this study is to recover the valuable m etals from these wastes. The treatments of these solids under oxidizing con ditions at 700 degrees C are well adapted for two samples. The totality of valuable elements are concentrated in the treatments' residues. The use of hydrogen at 600 degrees C, permits the removal of up to 100 % of valuable m etals contained in the treated industrial wastes. The recovery rate of valu able metals (Pb, Zn, Cu) as well as the Global Decontamination Factor are r eported.