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The formation of solid solution combined with tricalcium phosphate and dicalcium silicate could promote a considerable removal of phosphorus from liquid slag to solid during hot metal dephosphorization,and thus the dephosphorization by using multi phase fluxes could significantly decrease the consumption of lime. However,the reaction mechanism of multi phase fluxes has not been understood clearly.In the present study,the phase diagram for the CaO-SiO_2-FeO-P_2O_5 system has been measured with certain oxygen partial pressure at hot metal pretreatment temperature.Comparing with the CaO-SiO_2-FeO system,shrinkage of liquid phase area at higher FeO contents was observed at 1 673 K with oxygen partial pressure of 9.2×10~(-11) atm.
The formation of solid solution combined with tricalcium phosphate and dicalcium silicate could promote a considerable removal of phosphorus from liquid slag to solid during hot metal dephosphorization, and thus the dephosphorization by using multiphase fluxes could significantly decrease the consumption of lime. However, the reaction mechanism of multiphase fluxes has not been observed in the present study, the phase diagram for the CaO-SiO_2-FeO-P_2O_5 system has been measured with certain oxygen partial pressure at hot metal pretreatment temperature. Comparing with the CaO-SiO_2- FeO system, shrinkage of liquid phase area at higher FeO contents was observed at 1 673 K with oxygen partial pressure of 9.2 × 10 ~ (-11) atm.