溶鉄中のマンガンと酸素の平衡

抄録

The equilibrium of manganese and oxygen in liquid iron was studied at temperatures of 1550.., 1607.. and 1663.. respectively. In the first place, the activity and free energy of oxygen in a binary Fe-O alloy were studied and successively those in the ternary Fe-Mn-O alloy were studied by almost same experimental procedure.
The electric iron or Fe-Mn alloys with the FeO-MnO slag in magnesia or alumina crucible were melted in the H₂-H₂0 gaseous mixtuTes, and then the samples for the analysis of oxygen and manganese were withdrawn by means of suction.
These data obtained were summarized as follow:
1) H2+O=H₂O
logK=7, 540/T-346
2) The activity coefficient of oxygen in a binary Fe-O alloy, log f ^(O) _O= (-13, 340/^T+6.59) [%O] 3) The contribution of manganese to the activity coefficient of oxygen in the ternary Fe-Mn-O alloy, f ^(Mn) _O, was very nearly unit.
4) FeO (in slag) +Mn=MnO (in slag) +Fe (l) log K_mn (s) = 6, 980/T-2.91
log K _mn (_l) 6, 440/T-2.83