1997 Volume 83 Issue 11 Pages 689-694
The effect of K2O addition to the CaO-CaF2-SiO2 flux on the phosphorus partition ratio between CaO-CaF2-SiO2 flux doubly saturated with CaO and 3CaO·SiO2 and carbon saturated iron melts has been investigated at 1473, 1523 and 1573K by a chemical equilibration technique. The partition ratio increases with increasing the K2O content. The phosphate capacity of CaO-K2O-CaF2-SiO2 flux was compared with various basic fluxes. The activity of K2O in the CaO-CaF2-SiO2 system doubly saturated with CaO and 3CaO·SiO2 has been determined at 1573K which rangs from 10-13 to 10-12.
