To improve the dephosphorization capacity of CaO–Al2O3–SiO2–MnO based ferromanganese slag, this work attempts to introduce Ce2O3 as a strong phosphorus fixative into and influence mechanism on process is investigated by thermodynamic analysis, structural melting temperature, viscosity tests. The results show that after adding 20 mass% can release O2− promote P-O0 bond P-O− transformation, thus ...