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A thermodynamic study of BaO + BaCl2 + Cr2O3 fluxes used for the removal of phosphorus from chromium-containing iron melts

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Abstract

Electrochemical measurements with solid-oxide galvanic cell of the type Mo/Mo + MoO2//ZrO2(MgO)//{Cu + Cr}alloy + (Cr2O3)slag/Mo were conducted at 1473 K in order to obtain the activities of Cr2O3 in BaO + BaCl2 + Cr2O3 slags used for dephosphorization of chromium-containing iron melts. Based on the activity measurements, it is concluded that in the system BaO + BaCl2 + Cr2 O3 at 1473 K, there are 1 two-phase region in saturation with pure Cr2O3(s) and 3 three-phase regions. The activities of Cr2O3 within such three-phase regions decrease with an increase in BaO/BaCl2 mole ratios. The Cr2O3 activities in BaO + BaCl2 + Cr2O3 fluxes are, in general, greater than those in CaO + CaCl2 + Cr2O3, corresponding to much more effective dephosphorization by BaO + BaCl2 + Cr2O3 fluxes rather than CaO + CaCl2 + Cr2O3 slag.

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Authors and Affiliations

  1. Department of Energy Science and Engineering, Kyoto University, 606, Kyoto, Japan

    T. K. Inouye (Graduate Student), H. Fujiwara (Research Associate), E. Ichise (Professor) & M. Iwase (Associate Professor)

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  1. T. K. Inouye
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  2. H. Fujiwara
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  3. E. Ichise
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  4. M. Iwase
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Inouye, T.K., Fujiwara, H., Ichise, E. et al. A thermodynamic study of BaO + BaCl2 + Cr2O3 fluxes used for the removal of phosphorus from chromium-containing iron melts. Metall Mater Trans B 25, 695–701 (1994). https://doi.org/10.1007/BF02655177

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  • DOI: https://doi.org/10.1007/BF02655177

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