Analisys of Electric Arc Furnace Slag

The black slag produced during the melting process in electric arc furnace can be used as adjunct in the operation of land filling, building operation of road grounds, and production of concrete. Their use limitation is due to the presence of polluting chemical elements, including Cr, Ba, V, Mo, etc...

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Bibliographic Details
Published in:	Steel research international Vol. 83; no. 11; pp. 1012 - 1019
Main Authors:	Mombelli, Davide, Mapelli, Carlo, Gruttadauria, Andrea, Baldizzone, Claudio, Magni, Francesco, Levrangi, Pier Luca, Simone, Piero
Format:	Journal Article
Language:	English
Published:	Weinheim WILEY-VCH Verlag 01-11-2012 WILEY‐VCH Verlag Wiley Subscription Services, Inc
Subjects:	black slag Chemical elements Electric Arc Furnace Electricity EN 12457 Furnaces optical basicity polluting elements Slag
Online Access:	Get full text
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Summary:	The black slag produced during the melting process in electric arc furnace can be used as adjunct in the operation of land filling, building operation of road grounds, and production of concrete. Their use limitation is due to the presence of polluting chemical elements, including Cr, Ba, V, Mo, etc, that can be dangerous for human and environment, resulting by using of polluted scraps (i.e., painted, lubricated, or polymeric compound scraps). The release extent of polluting elements appears to behave as a function of the constituent phases, i.e., CaO, SiO2, Al2O3, MgO, etc. The main tools employed in the characterization of the black slag consists in optical basicity calculation, SEM‐EBS and SEM‐EDS analysis. The combination of the data coming from chemical analysis, micro‐structural examination and releasing tests allows to identify the correct chemical range avoiding dangerous chemical release and to develop a working disposal procedure for the investigated slag. EAF black slag represent today a crucial issue for steelmaking plants. The content of dangerous and polluting elements, such as Cr, V and Ba, avoid the recycle of these slag. The survey allows to better understand the mechanisms rule the releasing of these elements and permit to select which phases should be promoted to create safe by‐product.
Bibliography:	ark:/67375/WNG-8R2L8CRP-T ArticleID:SRIN201100259 istex:93610AE332E3295BBA8CF54311A302464F2727C5
ISSN:	1611-3683 1869-344X
DOI:	10.1002/srin.201100259