Title: Formation of the ZnFe2O4 phase in an electric arc furnace off-gas treatment system
Authors: Suetens, Thomas ×
Guo, Muxing
Van Acker, Karel
Blanpain, Bart #
Issue Date: 2015
Publisher: Elsevier Scientific Pub. Co.
Series Title: Journal of Hazardous Materials vol:287 pages:180-187
Abstract: To better understand the phenomena of ZnFe2O4 spinel formation in electric arc furnace dust, the dust was characterized with particle size analysis, X-ray fluorescence (XRF), electron backscatter diffraction (EBSD), and electron probe micro-analysis (EPMA). Different ZnFe2O4 formation reaction extents were observed for iron oxide particles with different particle sizes. ZnO particles were present as both individual particles and aggregated on the surface of larger particles. Also, the slag particles found in the off-gas were shown not to react with the zinc vapor. After confirming the presence of a ZnFe2O4 formation reaction, the thermodynamic feasibility of in-process separation – a new electric arc furnace dust treatment technology – was reevaluated. The large air intake and the presence of iron oxide particles in the off-gas were included into the thermodynamic calculations. The formation of the stable ZnFe2O4 spinel phase was shown to be thermodynamically favorable in current electric arc furnace off-gas ducts conditions even before reaching the post combustion chamber.
ISSN: 0304-3894
Publication status: published
KU Leuven publication type: IT
Appears in Collections:Sustainable Metals Processing and Recycling
× corresponding author
# (joint) last author

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