Thermodynamic assessment of Al and Mg in the deoxidation reactions of liquid iron

摘要

The deoxidation reactions of aluminum and magnesium in liquid irons have been investigated thermodynamically using Al_2O_3 and MgO crucibles,respectively,at 1873K under Ar atmosphere and discussed from the standpoint of clean steel technology.Based on the present experimental results together with the previously published data,the equilibrium constants(logK_Al, logK_Mg) for deoxidation reactions; Al_2O_3(s) = 2 Al + 3 O, MgO(s) = Mg + O,and the interaction parameters between Al,Mg and O in liquid irons were determined terms of first-order(e_o~Al,e_o~Mg) and second-order(r_o~Al,r_o~Mg):