Authors: da Silva, M. C.; Bernardes, A. M.; Bergmann, C. P.; Tenório, J. A. S.; Espinosa, D. C. R.

Source: Ironmaking & Steelmaking, Volume 35, Number 4, May 2008 , pp. 315-320(6)

Publisher: Maney Publishing

Abstract:

Electric arc furnace (EAF) dust is a waste generated in the EAF during the steel production process. Among different wastes, EAF dust represents one of the most hazardous, since it contains heavy metals such as Zn, Fe, Cr, Cd and Pb. The goal of the present work is to characterise the waste through chemical analysis, particle size distribution, X-ray diffraction (XRD), scanning electron microscopy coupled with energy dispersive spectroscopy detection and thermal analysis. The waste sample is composed essentially of spherical particles and has a very small particle size and the majority of the identified elements were Fe, Zn, Ca, Cr, Mn, K and Si. The XRD has presented compounds such as ZnO, ZnFe₂O₄, Fe₂O₃, MnO, SiO₂, FeFe₂O₄ and MnAl₂O₄. According to the thermal analysis results, up to 1000°C the total weight loss was ?5%. The results of waste characterisation are very important to these further investigations.

Keywords: HAZARDOUS WASTE; RECYCLING; EAF DUST; PLAIN CARBON STEEL PRODUCTION

Document Type: Research Article

DOI: http://dx.doi.org/10.1179/030192307X232936

Publication date: 2008-05-01

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