Abstract:In order to realize energy saving, environmental protection and low carbon resource utilization of zinc containing metallurgical dust, the physicochemical properties of raw materials such as moisture, particle size, chemical composition, phase composition and SEM-EDS were analyzed. The results show that water content of zinc containing metallurgical dust is 3.43%, which is easy to be removed. The particles size is different, and the fine particles will aggregate into clusters and adhere to the surface of large particles. The main components with recycling value are zinc and iron, the contents of which are 5.06% and 29.24%, respectively. Zinc mainly exists in the form of ZnFe2O4 in fine particles and iron mainly exists in the form of Fe2O3. The experimental study on zinc-iron separation of zinc containing metallurgical dust shows that both direct magnetic separation and conventional roasting-magnetic separation have unsatisfactory Zn-Fe separation effects, while microwave roasting-magnetic separation can achieve better zinc-iron enrichment and separation effect. Under the conditions of microwave roasting temperature of 700 ℃ and roasting time of 10 min, the yield, iron content and zinc content of magnetic concentrates is 61.67%, 54.39% and 2.62% respectively, the content of zinc and iron in magnetic tailings is 12.15% and 9.74% respectively. Both concentrate and tailings of magnetic separation can achieve better recovery and utilization of resources.