Identifying the Possibilities for Superior Recovery by Pelletization of Industry Related Small and Powdery Iron Containing Waste

Abstract

Maximal recovery of iron contents waste is an important problem in siderurgy, since its needed transformation into by-products, thus into valuable economic goods, can lead to a rational exploitation of raw material, thus, ensuring industrial needs, as well as environmental protection. Powder waste can be processed in the form of pellets or briquettes and then is used in the steelmaking processes. Thus, the powdery ferrous wastes resulting from the materials industry, from the point of view of granulation, corresponds to processing by pelletization. In line with the superior recovery of waste, our research has focused on identifying the possibilities for the pelletization of industry related the small and powdery iron containing waste that exists in very large quantities, in Hunedoara County area (Hunedoara and Calan) and beyond. This article presents the results relating to the possibilities of pelletization, of industrial small and powdery iron containing waste, from the steel industry (steel dust, mixed agglomerating and blast furnace dust, landfilled in siderurgical ponds, in vicinity of the former industrial areas of Hunedoara and Calan, Hunedoara County). The origin of the material is the minerals (bauxite residue / red mud, landfilled in vicinity of Oradea, Bihor County) or from metal surface treatment operations (coating anticorrosive dust, collected in Oradea) in the industry. The waste utilized in the laboratory experiments was processed using a series of installed equipped in the laboratories at the Faculty of Engineering in Hunedoara, University Politehnica Timisoara.