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Microwave selective heating of electric arc furnace dust constituents toward sustainable recycling: Contribution of electric and magnetic fields

Altarawneh, Sanad; Al-Harahsheh, Mohammad; Buttress, Adam; Dodds, Chris; Rodriguez, Jose; Kingman, Sam

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Authors

Sanad Altarawneh

Mohammad Al-Harahsheh

CHRIS DODDS CHRIS.DODDS@NOTTINGHAM.AC.UK
Professor of Process Engineering

SAM KINGMAN SAM.KINGMAN@NOTTINGHAM.AC.UK
Pro-Vice Chancellor Faculty of Engineering



Abstract

Microwave heating of waste electric arc furnace dust (EAFD) for the purpose of its remediation has been studied extensively. However, these studies considered EAFD as a bulk material without addressing either the relative response of its individual constituents or the specific interactions with either the electric or magnetic fields of an electromagnetic wave. In this work, we present a study of the relative contribution of the electromagnetic wave components to the heating of EAFD constituents using separated electric and magnetic microwave fields. ZnO, ZnFe2O4, Fe3O4, and graphite were found to be the main contributors to the heating of EAFD based on their dielectric properties and heating profiles. ZnO and ZnFe2O4 heated only in the electric field yielding temperatures of 846 and 720 °C after heating for 30 and 40 s, respectively at a power input of 118 ± 12 W. Fe3O4 and graphite, in contrast, heated in both electric and magnetic fields owing to their respective magnetic and conductive nature. It is suggested that the selective magnetic heating of Fe3O4 has significant implications for the selective extraction of zinc and lead through thermal treatment of EAFD with halogenated plastics such as polyvinyl chloride (PVC).

Citation

Altarawneh, S., Al-Harahsheh, M., Buttress, A., Dodds, C., Rodriguez, J., & Kingman, S. (2021). Microwave selective heating of electric arc furnace dust constituents toward sustainable recycling: Contribution of electric and magnetic fields. Journal of Industrial and Engineering Chemistry, 104, 521-528. https://doi.org/10.1016/j.jiec.2021.09.001

Journal Article Type Article
Acceptance Date Sep 2, 2021
Online Publication Date Sep 8, 2021
Publication Date Dec 25, 2021
Deposit Date Sep 23, 2021
Publicly Available Date Sep 9, 2022
Journal Journal of Industrial and Engineering Chemistry
Print ISSN 1226-086X
Electronic ISSN 2234-5957
Publisher Elsevier
Peer Reviewed Peer Reviewed
Volume 104
Pages 521-528
DOI https://doi.org/10.1016/j.jiec.2021.09.001
Keywords EAFD; Metal extraction; Dielectric properties; Magnetic hysteresis; Magnetite
Public URL https://nottingham-repository.worktribe.com/output/6297734
Publisher URL https://www.sciencedirect.com/science/article/pii/S1226086X21005062

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