Abstract
The Slag-Metal reactions in Electro-Slag remelting were studied by using several electrode wires and CaO-SiO2-CaF2 flux.
The following results were obtained;
(1) Manganese in the electrode wire is mainly oxidized after detachment of droplets from the electrode tips.
(2) Increasing SiO2 content in the flux, Manganese in the electrode is easily oxidized and Silicon content in the remelted metal increases.
(3) Equilibrium parameters (KW) in the slag-metal reactions are as follows;
a)(SiO2)+2[Mn]=[Si]+2(MnO)
KWSiO2-Mn=[%Si⋅(MnO)2]/(%SiO2)⋅[%Mn]2
logKWSiO2-Mn=-2.261(CaO/SiO2)+1.685
b)(SiO2)+2[Fe]=[Si]+2(FeO)
KWSiO2-Fe=[%Si](%FeO)2/(%SiO2)
logKWSiO2-Fe=-1.384(CaO/SiO2)+0.0055
c)[Mn]+(FcO)=(MnO)+[Fe]
KWMn-FeO=(%MnO)/[%Mn]⋅(%FeO)
KWMn-FeO=-3.467(CaO/SiO2)+6.314
d)(FcO)=[Fe]+[O]
LW0=[%O]/(%FeO)=0.0051
