Abstract
A circular economy is one of the important pillars for a sustainable iron and steel industry. Solid and sludgy residuals from steelmaking processes represent secondary resources with considerable amounts of valuable materials such as metals and minerals. Therefore, several treatment technologies for dusts and sludges target material recovery. Nowadays, European steel producers reach a by-product recycling rate of more than 90% (including onsite recycling and residual utilization performed by external companies). The main benefits are a lower demand for primary resources and a reduced landfill volume as well as economic savings for steel plant operators. The current article gives an overview of the amounts of steelmaking residuals generated in Europe and describes the integrated DK recycling route, which represents one industrial-scale state-of-the-art treatment technology.
Zusammenfassung
Für eine nachhaltige Stahlindustrie braucht es eine effiziente Kreislaufwirtschaft. Stäube und Schlämme aus der Stahlerzeugung stellen Sekundärressourcen mit teils beträchtlichen Anteilen an Wertstoffen, wie z. B. Metalle und mineralische Komponenten, dar. Daher sind zahlreiche Behandlungsmethoden auf eine Materialrückgewinnung fokussiert. Berücksichtigt man die stahlwerksinterne Verwertung sowie die Behandlung und Verwertung durch externe Unternehmen, erreichen europäische Stahlproduzenten heutzutage eine Verwertungsquote von mehr als 90 %. Bedeutende Vorteile dieser hohen Quote sind ein geringerer Bedarf an Deponievolumen sowie finanzielle Einsparungen für Stahlwerksbetreiber durch die Einsparung an Primärrohstoffen. Der gegenständliche Artikel gibt einen Überblick der in Europa anfallenden Mengen an Stahlwerksreststoffen und beschreibt die integrierte DK-Recycling-Route als eine zum Stand der Technik zählende Behandlungsroute.
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Acknowledgements
The authors gratefully acknowledge the funding support of K1-MET GmbH, metallurgical competence center. The research program of the K1-MET competence center is supported by COMET (Competence Center for Excellent Technologies), the Austrian program for competence centers. K1-MET is funded by the Federal Ministry for Transport, Innovation and Technology, the Federal Ministry for Digital and Economic Affairs, the provinces of Upper Austria, Tyrol and Styria as well as the Styrian Business Promotion Agency (SFG).
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Rieger, J., Schenk, J. State-of-the-art Processing Solutions of Steelmaking Residuals. Berg Huettenmaenn Monatsh 165, 227–231 (2020). https://doi.org/10.1007/s00501-020-00950-x
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DOI: https://doi.org/10.1007/s00501-020-00950-x