Y. Kanzaki et al., THE SOLUBILITY OF CAO-CENTER-DOT-CR2O3 IN THE CAO-CAF2 SYSTEM ASSOCIATED WITH DEPHOSPHORIZATION OF FE-CR-C MELTS, Tetsu to hagane, 80(1), 1994, pp. 13-17
The solubility of chromium oxide in the CaO-CaF2 system has been deter
mined at 1773K by equilibrating the flux with a CaO.Cr2O3 pellet at th
e oxygen partial pressure of 2.28 x 10(-7) Pa. The solubility of Cr2O3
varies from 0.80 to 1.28 mass% in the flux with increasing the CaO co
ntent from 15.6 to 20.6 mass%. In case of the dephosphorization of Fe-
Cr-C melts with CaO bearing fluxes, the prevailing oxygen partial pres
sure of the system is controlled by the reaction between CaO and Cr2O3
forming CaO.Cr2O3. The phosphorus distribution ratio between Fe-Cr-C-
satd. alloys and CaO-SiO2-CaF2 fluxes saturated with CaO.Cr2O3, CaO an
d 3CaO.SiO2 has been measured at 1573K. The phosphorus and chromium di
stribution ratios decrease with increasing chromium content of the met
al from 1 to 13 mass%.