Abstract
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.
| Original language | English |
|---|---|
| Pages (from-to) | 433-437 |
| Number of pages | 5 |
| Journal | Steel Research |
| Volume | 73 |
| Issue number | 10 |
| DOIs | |
| Publication status | Published - 2002 Jan 1 |
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All Science Journal Classification (ASJC) codes
- Metals and Alloys
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Thermodynamic behaviour of carbonate in CaO based slag. / Song, Hyo Seok; Kim, Dong Sik; Rhee, Peter Chang Hee; Min, Dong Joon.
In: Steel Research, Vol. 73, No. 10, 01.01.2002, p. 433-437.Research output: Contribution to journal › Article
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 - 2002/1/1
Y1 - 2002/1/1
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
VL - 73
SP - 433
EP - 437
JO - Steel Research International
JF - Steel Research International
SN - 1611-3683
IS - 10
ER -