Nitride Capacities in the CaO-base Ternary Slags at 1 873 K

摘要

Nitride capacities (C_N= (mass%N) • P_(O_2)~(3/4))/P_(N_2)~(1/2)) in the CaO-Al_2O_3-MgO(ZrO_2) and CaO-SiO_2-MgO(TiO_x) ternary slags were measured at 1 873 K by a gas-slag equilibration technique, using an Mo, Al_2O_3 or MgO crucible under controlled partial pressures of oxygen (log(P_(O_2)/atm) = -11 --14) and nitrogen (P_(N_2) = 0.9atm). The C_N values increased with increasing the contents of nitride former oxides. The C_N values in the CaO-AlO_(1.5)-MO_x (MO_x=MgO, SiO_2, ZrO_2, TiO_x) slags at X_(CaO)/X_(AlO_(1.5)) = 0.4-0.7 increased in the order of MgO < SiO_2 < ZrO_2< TiO_x and those in the CaO-SiO_2-MO_x (MO_x=MgO, AlO_(1.5), TiO_X) slags at X_(CaO)/X_(Si_(O_2)) = 1.0-1.5 increased in the order of MgO< AlO_(1.5)< TiO_x at a given MOX content.