Abstract
Carbonation of a synthesized CaO-Al2O3-MgO-SiO2 ladle refining slag has been kinetically studied using a thermo-gravimetric analyzer (TGA). The effects of extended basicity (CaO/Al2O3), temperature, and the crystal phase ratio were considered. The carbonation ratio and the initial reaction rate increased with basicity. However, for the same basicity of the slag, a decreasing crystal phase ratio seemed to accelerate the carbonation reaction due to the higher reactivity of the O2- ions within the slag. The carbonation ratio and the initial reaction rate were also found to increase with temperature in the range between 973 K and 1073 K, where the temperature effect was clearly observed at the onset of the reaction. Parameters were set to identify the carbonation mechanism and their values were calculated via regression analysis. The activation energy for carbonation was calculated to be 129.9 kJ/mol at C/A=1.0 and 109.0 kJ/mol at C/A=1.2.
| Original language | English |
|---|---|
| Pages (from-to) | 35-42 |
| Number of pages | 8 |
| Journal | Journal of Korean Institute of Metals and Materials |
| Volume | 53 |
| Issue number | 1 |
| DOIs | |
| Publication status | Published - 2015 Jan 1 |
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All Science Journal Classification (ASJC) codes
- Electronic, Optical and Magnetic Materials
- Modelling and Simulation
- Surfaces, Coatings and Films
- Metals and Alloys
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A kinetic study on the carbonation of steelmaking slags. / Yu, Jong Yeong; Jung, Sung Suk; Sohn, Il.
In: Journal of Korean Institute of Metals and Materials, Vol. 53, No. 1, 01.01.2015, p. 35-42.Research output: Contribution to journal › Article
TY - JOUR
T1 - A kinetic study on the carbonation of steelmaking slags
AU - Yu, Jong Yeong
AU - Jung, Sung Suk
AU - Sohn, Il
PY - 2015/1/1
Y1 - 2015/1/1
N2 - Carbonation of a synthesized CaO-Al2O3-MgO-SiO2 ladle refining slag has been kinetically studied using a thermo-gravimetric analyzer (TGA). The effects of extended basicity (CaO/Al2O3), temperature, and the crystal phase ratio were considered. The carbonation ratio and the initial reaction rate increased with basicity. However, for the same basicity of the slag, a decreasing crystal phase ratio seemed to accelerate the carbonation reaction due to the higher reactivity of the O2- ions within the slag. The carbonation ratio and the initial reaction rate were also found to increase with temperature in the range between 973 K and 1073 K, where the temperature effect was clearly observed at the onset of the reaction. Parameters were set to identify the carbonation mechanism and their values were calculated via regression analysis. The activation energy for carbonation was calculated to be 129.9 kJ/mol at C/A=1.0 and 109.0 kJ/mol at C/A=1.2.
AB - Carbonation of a synthesized CaO-Al2O3-MgO-SiO2 ladle refining slag has been kinetically studied using a thermo-gravimetric analyzer (TGA). The effects of extended basicity (CaO/Al2O3), temperature, and the crystal phase ratio were considered. The carbonation ratio and the initial reaction rate increased with basicity. However, for the same basicity of the slag, a decreasing crystal phase ratio seemed to accelerate the carbonation reaction due to the higher reactivity of the O2- ions within the slag. The carbonation ratio and the initial reaction rate were also found to increase with temperature in the range between 973 K and 1073 K, where the temperature effect was clearly observed at the onset of the reaction. Parameters were set to identify the carbonation mechanism and their values were calculated via regression analysis. The activation energy for carbonation was calculated to be 129.9 kJ/mol at C/A=1.0 and 109.0 kJ/mol at C/A=1.2.
UR - http://www.scopus.com/inward/record.url?scp=84923683266&partnerID=8YFLogxK
UR - http://www.scopus.com/inward/citedby.url?scp=84923683266&partnerID=8YFLogxK
U2 - 10.3365/KJMM.2014.53.1.35
DO - 10.3365/KJMM.2014.53.1.35
M3 - Article
AN - SCOPUS:84923683266
VL - 53
SP - 35
EP - 42
JO - Journal of Korean Institute of Metals and Materials
JF - Journal of Korean Institute of Metals and Materials
SN - 1738-8228
IS - 1
ER -