Abstract
Phosphorus distribution between MgOsat.-BaO-Cr2O3-FetO(-BaF2) slags and liquid iron containing Cr ([%Cr]=0-16) has been measured in the temperature range from 1550 to 1650°C. The refining limit of dephosphorization in steel containing Cr and hot metal was discussed by using the values for phosphate capacity CP(=(%P)/[aP•a5/2O]). Thermodynamic analysis indicates that the phosphorus partition ratio increases with C up to a critical value and decreases beyond that.
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