Thermodynamics of nitrogen in CaO‐TiO2‐TiO1.5 slags

The nitride capacities in CaO‐TiO2‐TiO1.5 slags, and nitrogen distribution ratio between these slags and liquid Cu (LN = (mass‐% N)/[mass‐% N]) were measured by a gas‐slag‐metal equilibration technique, using a Mo crucible in the temperature range of 1823 to 1923 K under controlled partial pressures of oxygen and nitrogen . The values for , (mass‐% Ti3+)/(mass‐% Ti4+) ratio, and solubility of TiN in CaO‐TiO2‐TiO1.5 slags were obtained as a function of slag composition (XCaO = 0.24 ∼ 0.39) and temperature. Activity coefficients of TiN were evaluated from the values for activity coefficients of Ti in liquid Cu which were calculated from the results of TiN saturation experiments.