TY - JOUR
T1 - Thermodynamic behaviour of carbonate in CaO based slag
AU - Song, Hyo Seok
AU - Kim, Dong Sik
AU - Rhee, Peter Chang Hee
AU - Min, Dong Joon
PY - 2002/10
Y1 - 2002/10
N2 - Carbonate solubility was measured for CaO bearing slag systems at 1600 °C under different thermodynamic conditions by using equilibration techniques. Carbonate solubility increased with activity of (CaO). The reaction mechanism of the carbonate dissolution in slag can be expressed as a reaction between CO2 gaseous phase and oxygen ion to form carbonate (CO32-). Carbonate capacities of various slags depended not only on oxygen ion but also activity coefficient of carbonate ion. The activity coefficient of carbonate ion in CaO-SiO2 slag changed with CaO content, but that of CaO-Al2O3 slag did not change remarkably. Substitution of MgO by CaO for solubility of carbonate had a similar effect as in the case of carbide in CaO-SiO2-MgO slag. The critical oxygen potential for carbide and carbonate stability was found to be 10-10 bar.
AB - Carbonate solubility was measured for CaO bearing slag systems at 1600 °C under different thermodynamic conditions by using equilibration techniques. Carbonate solubility increased with activity of (CaO). The reaction mechanism of the carbonate dissolution in slag can be expressed as a reaction between CO2 gaseous phase and oxygen ion to form carbonate (CO32-). Carbonate capacities of various slags depended not only on oxygen ion but also activity coefficient of carbonate ion. The activity coefficient of carbonate ion in CaO-SiO2 slag changed with CaO content, but that of CaO-Al2O3 slag did not change remarkably. Substitution of MgO by CaO for solubility of carbonate had a similar effect as in the case of carbide in CaO-SiO2-MgO slag. The critical oxygen potential for carbide and carbonate stability was found to be 10-10 bar.
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U2 - 10.1002/srin.200200011
DO - 10.1002/srin.200200011
M3 - Article
AN - SCOPUS:0036809161
VL - 73
SP - 433
EP - 437
JO - Steel Research International
JF - Steel Research International
SN - 1611-3683
IS - 10
ER -