Title
International comparison of impurities mixing and accumulation in steel scrap
Author
Panasiuk, Daryna (University of Tokyo)
Daigo, Ichiro (University of Tokyo)
Hoshino, Takeo (University of Tokyo)
Hayashi, Hideo (Tokyo MetropolitanIndustrial Technology Research Institute, Tokyo)
Yamasue, Eiji (Ritsumeikan University, Biwako-Kusatsu)
Tran, Duc Huy (Hanoi University of Science and Technology)
Sprecher, Benjamin (TU Delft Design for Sustainability) 
Shi, Feng (Nanjing University)
Shatokha, Volodymyr (National Metallurgical Academy of Ukraine, Ukraine)
Date
2022
Abstract
The accumulation of impurities in the recycling of steel impacts the quality of secondary steel. Understanding impurity levels is crucial in the context of the proliferation of circular economy policies, expected high recycling rates, and growth of scrap consumption. By assuming the accumulation of impurities to be equal worldwide, the understanding of the extent and variation of the mixing and accumulation was limited in previous studies, and the factors influencing those variations were not considered. This is a first cross-national comparison of impurity accumulation in recycled steel. In this study, the copper, tin, nickel, chromium, and molybdenum content was analyzed in over 500 samples of electric arc furnace rebars from China, Japan, Vietnam, Ukraine, and the Netherlands (representing northwestern Europe) with an optical emission spectrometer. The impurity content in rebars represents the content of impurities accumulated in steel scrap in the countries studied. The measured content of impurities was then used to determine the factors influencing the accumulation of those impurities. It was revealed that the recycling technology, the presence of a market for recovered metals, the quality of the material input, steelmaking practices, and the management of byproducts derived from a legislative or economic context played a role in the impurities content. By communicating on scrap chemical content, the collaboration between the recycling and steel industries could be enhanced in terms of matching the demand and supply and facilitating an increase in the scrap share in steelmaking.
Subject
industrial ecology
materials management
recycling
scrap
steel
tramp metal
To reference this document use:
http://resolver.tudelft.nl/uuid:94e3dba0-cab2-4898-8c44-8f22a6902dc4
DOI
https://doi.org/10.1111/jiec.13246
ISSN
1088-1980
Source
Journal of Industrial Ecology, 26 (3), 1040-1050
Part of collection
Institutional Repository
Document type
journal article
Rights
© 2022 Daryna Panasiuk, Ichiro Daigo, Takeo Hoshino, Hideo Hayashi, Eiji Yamasue, Duc Huy Tran, Benjamin Sprecher, Feng Shi, Volodymyr Shatokha