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http://dx.doi.org/10.3365/KJMM.2010.48.08.765

Oxygen Equilibrium and the Solubility of MgO in CaO-FetO-MgO-SiO2(≤5mass%)-ΣMxOy Slags and Molten Iron  

Shin, Dong-Yeop (Division of Material Science and Engineering, Inha University)
Lee, Joo-Ho (Division of Material Science and Engineering, Inha University)
Hong, Seong-Hun (Division of Material Science and Engineering, Inha University)
You, Byung-Don (Division of Material Science and Engineering, Inha University)
Seo, Seong-Mo (Technical Research Laboratories, POSCO)
Park, Jong-Min (Technical Research Laboratories, POSCO)
Publication Information
Korean Journal of Metals and Materials / v.48, no.8, 2010 , pp. 765-774 More about this Journal
Abstract
Oxygen equilibrium and the solubility of MgO have been measured in the $CaO-Fe_tO-MgO-SiO_2({\leq}5mass%)-{\Sigma}M_xO_y$ slag in equilibrium with liquid iron in the temperature range of 1550 to $1700^{\circ}C$. The effect of oxides on the MgO solubility, and a method for calculating the solubility of MgO using slag composition and temperature,were discussed. The solubility of MgO is increased with increasing temperature and $Fe_tO$ content, and with decreasing basicity (C/S). The effect of ${\Sigma}M_xO_y$ on the solubility of MgO is a dilution effect due to the increase in slag volume. The activity and activity coefficient of $Fe_tO$ decreased with increasing basicity (B). The effect of temperature on the activity was negligible. The value of ${\rho}=Fe^{3+}/Fe^{2+}$ increased with the increase of the slag basicity (B") and the decrease of the $Fe_tO$ content in the slag.
Keywords
Oxides; melting; slag; thermodynamic;
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