| Title | Efficient Steel Mill Dust Recycling-Aiming for Zero Waste |
|---|---|
| ID_Doc | 6797 |
| Authors | Antrekowitsch, J; Hanke, G |
| Title | Efficient Steel Mill Dust Recycling-Aiming for Zero Waste |
| Year | 2022 |
| Published | |
| Abstract | Steel mill dust recycling today is an important business. However, most processes in operation hardly fulfil future requirements from the environmental point of view. In general, these treatment facilities show a certain CO2-footprint due to carbothermal reduction and produce high amounts of residues which often have to be landfilled. The paper discusses possibilities to optimize state of the art processes regarding the realization of a zero waste strategy and the minimization of the CO2-footprint. Furthermore, new developments are evaluated in respect of energy consumptions and environmental awareness. As an example, the "2-step-Dust-Recycling" process, an own development of the University of Leoben in Austria, is analyzed regarding its potential to meet requirements of present and future environmental legislation. Finally, the way how different options of steel dust treatment influence the overall zinc cycle, especially the role of zinc oxide from such sources as substitute for primary concentrates, is described. |
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