Study on Oxide Inclusion Dissolution in Secondary Steelmaking Slags using High Temperature Confocal Scanning Laser Microscopy
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In: Steel research international, Vol. 87.2016, No. 1, 01.2016, p. 57-67.
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TY - JOUR
T1 - Study on Oxide Inclusion Dissolution in Secondary Steelmaking Slags using High Temperature Confocal Scanning Laser Microscopy
AU - Michelic, Susanne Katharina
AU - Goriupp, Jürgen
AU - Feichtinger, Stefan
AU - Kang, Youn-Bae
AU - Bernhard, Christian
AU - Schenk, Johannes
PY - 2016/1
Y1 - 2016/1
N2 - High temperature confocal scanning laser microscopy (HT-CSLM) is used to study the dissolution behavior of Al2O3 inclusions in various slag compositions in the system CaO-Al2O3-SiO2-MgO. This method enables the in situ observation of the dissolution at steelmaking temperatures. The change of the diameter of the spherical inclusion is measured by image analysis of pictures obtained from the HT-CSLM. Subsequently, dissolution rates and normalized dissolution curves are determined, and the governing dissolution mechanism is identified by the use of a modified approach of the diffusion equation introduced by Feichtinger et al.27 and compared with the dissolution of SiO2 previously reported by the same authors.27 Finally, effective binary diffusion coefficients are calculated. Slag viscosity is shown to essentially affect the dissolution behavior, changing the normalized dissolution pattern from rather S-shaped (high slag viscosity) to a parabolic form (low slag viscosity).
AB - High temperature confocal scanning laser microscopy (HT-CSLM) is used to study the dissolution behavior of Al2O3 inclusions in various slag compositions in the system CaO-Al2O3-SiO2-MgO. This method enables the in situ observation of the dissolution at steelmaking temperatures. The change of the diameter of the spherical inclusion is measured by image analysis of pictures obtained from the HT-CSLM. Subsequently, dissolution rates and normalized dissolution curves are determined, and the governing dissolution mechanism is identified by the use of a modified approach of the diffusion equation introduced by Feichtinger et al.27 and compared with the dissolution of SiO2 previously reported by the same authors.27 Finally, effective binary diffusion coefficients are calculated. Slag viscosity is shown to essentially affect the dissolution behavior, changing the normalized dissolution pattern from rather S-shaped (high slag viscosity) to a parabolic form (low slag viscosity).
U2 - 10.1002/srin.201500102
DO - 10.1002/srin.201500102
M3 - Article
VL - 87.2016
SP - 57
EP - 67
JO - Steel research international
JF - Steel research international
SN - 0177-4832
IS - 1
ER -
