Kinetics of reduction iron oxide in CaO-SiO2-Al2O3-FetO slags with carbon saturated in molten iron

The rate of reducing FetO in CaO-SiO2-Al2O3-FetO slags with carbon saturated in molten iron has been determined in a graphite crucible in the temperature range of 1673-1773K. The effects of temperature, slag basicity and FetO content on the reduction rate have also been discussed. Test results show that the reduction rate increases with increasing temperature or FetO concentration in slags, and the reduction rate has a parabolic relation with the simple basicity or optical basicity of slag, the maximum reduction rate being observed at around CaO/SiO=1.5 of molten slags. The reduction reaction order is 1.73 or 1.80, and the reduction activity energy is 299.9 or 295.9 kJ/mol in regard to FetO weight content or FetO activity calculated by using regular solution model, respectively. The reduction rate of CaO-SiO2-Al2O3-FetO slags with carbon saturated in molten iron in the range of 0.32-3.48 mol-O/cm2��s.