Metall. Res. Technol.
Volume 113, Number 4, 2016
|Number of page(s)||12|
|Published online||06 June 2016|
Experimental investigation and thermodynamic modeling of vanadium, chromium and phosphorus distributions between FeO-SiO2-CaO-V2O3-Cr2O3-P2O5-MnO slag and semi-steel
1 College of Materials Science and
Engineering, Chongqing University, Chongqing
2 Department of Scientific Research, Chongqing University of Education, Chongqing 400065, P.R. China
Accepted: 4 April 2016
The oxidation behavior of hot metal and the distribution ratios of V, Cr and P between FeO-SiO2-CaO-V2O3-Cr2O3-P2O5-MnO slags and semi-steel have been studied by a combination of experimental measurements and thermodynamic modeling. The results indicate that the distribution ratio of P shows an obvious increasing tendency with the increase of slag basicity. In contrast to the P distribution, the effect of basicity on distribution ratios of V and Cr are negligible. The oxidation ratios of both V and Cr are higher than 84% and the oxidation ratio of P can achieve 40–60%. A thermodynamic model for calculating the mass action concentration of structural units and distribution ratios of V, Cr and P was developed based on the ion and molecule coexistence theory (IMCT). The calculated V and P distributions show good agreement with the experimentally measured data. The reliable agreement indicates that the IMCT model can be applied to predicting the element distributions for basic vanadium slag.
Key words: Ion and molecule coexistence theory / vanadium slag / chromium / phosphorus / distribution ratio
© EDP Sciences, 2016
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