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Ageing investigation of steel slags from EAF (Electric Arc Furnace) processes
Luleå University of Technology, Department of Civil, Environmental and Natural Resources Engineering, Sustainable Process Engineering.ORCID iD: 0000-0001-9297-8521
2008 (English)In: REWAS 2008: Global Symposium on Recycling, Waste Treatment and Clean Technology / [ed] B Mishra; C Ludwig; S Das, Minerals, Metals & Materials Society, 2008, p. 353-358Conference paper, Published paper (Refereed)
Abstract [en]

Large amounts of by-products are generated by the Swedish steel industry each year. The EAF-process generates about 400 000 ton of slag, from which 80% is deposit. An alternative to deposit is to use slag as road construction material. However, metal content in the slag can be a problem, due to the leaching. The aim of this work was to investigate how stable these materials are when ageing and kept outside. Five different EAF-slags from domestic steel plants were used in this study. The materials were characterised after 0, 6, 12, 18 and 24 month to evaluate the ageing process. Scanning electron microscope (SEM), x-ray diffraction pattern (XRD) and a standard test for leaching were used. The changes in behaviour differ between the five materials. The total leachability decreases with time for all samples. CaCO3 is formed on slag surfaces as CaO reacts with moister and CO2 in the air.

Place, publisher, year, edition, pages
Minerals, Metals & Materials Society, 2008. p. 353-358
National Category
Metallurgy and Metallic Materials
Research subject
Process Metallurgy
Identifiers
URN: urn:nbn:se:ltu:diva-27265Local ID: 0a5a6390-bad1-11dd-b223-000ea68e967bISBN: 978-0-87339-726-1 (print)OAI: oai:DiVA.org:ltu-27265DiVA, id: diva2:1000448
Conference
Global Symposium on Recycling, Waste Treatment and Clean Technology : 12/10/2008 - 16/10/2008
Note
Godkänd; 2008; 20081125 (fren)Available from: 2016-09-30 Created: 2016-09-30 Last updated: 2018-01-19Bibliographically approved

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Engström, FredrikLidström-Larsson, MargaretaSamuelsson, CaisaBjörkman, Bo

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CiteExportLink to record
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Citation style
  • apa
  • harvard1
  • ieee
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  • vancouver
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More styles
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  • de-DE
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Output format
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