The Influence of Varying Thermal Treatment Conditions on Reducing Zinc Content from a Steelmaking and Blast Furnace Sludge

The prospects of processing blast furnace and steelmaking sludge using the Waelz process in a laboratory rotary kiln, is shown. influence different temperatures, atmosphere type reducing agents on level zinc reduction from sludges was analyzed. In general, contains high portion iron (approx. 48 wt.%) can be reused as charge after satisfactory reduction. It found that N- content graphite or coke oven agent combination with temperature reduce Zn to 0.08 wt.% at 1200 °C for mixture sludge. A significant 0.66 occurs 1100 °C. plays an important role; has shown better ability compared dust. When nitrogen used, reduced even without additional agent, since carbon contained made use air atmosphere, there no content.