Thermodynamic behaviour of carbonate in CaO based slag

Hyo Seok Song, Dong Sik Kim, Peter Chang Hee Rhee, Dong Joon Min

Research output: Contribution to journalArticle

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 languageEnglish
Pages (from-to)433-437
Number of pages5
JournalSteel Research
Volume73
Issue number10
DOIs
Publication statusPublished - 2002 Jan 1

Fingerprint

slags
Carbonates
Slags
carbonates
Thermodynamics
thermodynamics
Ions
solubility
Solubility
Activity coefficients
Oxygen
oxygen ions
carbides
Carbides
Bearings (structural)
ions
coefficients
dissolving
Dissolution
Substitution reactions

All Science Journal Classification (ASJC) codes

  • Metals and Alloys

Cite this

Song, Hyo Seok ; Kim, Dong Sik ; Rhee, Peter Chang Hee ; Min, Dong Joon. / Thermodynamic behaviour of carbonate in CaO based slag. In: Steel Research. 2002 ; Vol. 73, No. 10. pp. 433-437.
@article{abf09590d9664bbbaac76bed3ed7a202,
title = "Thermodynamic behaviour of carbonate in CaO based slag",
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.",
author = "Song, {Hyo Seok} and Kim, {Dong Sik} and Rhee, {Peter Chang Hee} and Min, {Dong Joon}",
year = "2002",
month = "1",
day = "1",
doi = "10.1002/srin.200200011",
language = "English",
volume = "73",
pages = "433--437",
journal = "Steel Research International",
issn = "1611-3683",
publisher = "Wiley-VCH Verlag",
number = "10",

}

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 journalArticle

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.

UR - http://www.scopus.com/inward/record.url?scp=0036809161&partnerID=8YFLogxK

UR - http://www.scopus.com/inward/citedby.url?scp=0036809161&partnerID=8YFLogxK

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 -