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Online Lecture by Prof. Manon Rolland
Improving scrap recycling: thermodynamic, microstructural, technical, economical and societal aspects
March 19 @ 15:00 – 16:00 CET
UMET – Unité Matériaux et Transformations,
Université de Lille, CNRS, INRAE, Centrale Lille, UMR 8207
F-59000 Lille, France
Title:
Improving scrap recycling: thermodynamic, microstructural, technical, economical and societal aspects.
Abstract:
Steel production is estimated to participate in 8% of the total world CO2 emission. This is due to the use of environmentally impacting technologies like blast furnaces. Additionally, this primary production and steel recycling brings social issues.
To decrease the overall impact of steel production, a part of the solution is to use Electric Arc Furnaces (EAF) and scrap. Nevertheless, it is worth highlighting that scrap is already quite used in the production. However, due the high variety of alloys in service and due to some limits in sorting (technological and economical), most of the so-called post-consumer scrap is downcycled as it contains tramp elements.
It is indeed used for less demanding application in terms of impurities quantity and consequent microstructures compared to the first alloy life.
Different solutions are envisaged to improve scrap recycling. For instance one can produce simpler materials in terms of composition or assembly. Some groups also explore the potential of purification of the mixed liquid melt to remove tramp elements. It is also possible to optimize the effect of the presence of tramp elements or to improve the metallic matter flows.
The two latter suggestions will be investigated in this talk to investigate, first, the effect of tramp elements on thermodynamics and on the kinetics of phases transformations. Secondly, scenarios to optimize metallic matter flows handling across the territories and in between the different metallurgy chain actors will be presented and analyzed to explore solutions to reduce the impact of steel production.
This session will be chaired by Joakim Odqvist (KTH Royal Institute of Technology)
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