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The oxygen potential of ferromanganese melt can be measured by oxygen concentration cell using ZrO_2 solid electrolyte stabilized by CaO(M0-MoO_2 as contrast electrode).The converted formula of oxygen potential and electromotive force is as follows:In po_2 = 20.03 —(69 548.8 + 46 427.7×E)/T.The temperature of desiliconization is 1 350 C.BF ferromanganese was desiliconized by the flux 1 which contents of BaCO_3,MnO_2 and(Fe_2O_3+CaF_2) are70%,5%and 25%respectively.When the treatment time is 15 min,Fe_2O_3 content is 12%for obtaining maximum rate of desiliconization.The relation of oxygen potential and activity of carbon is as follows:po_2,m/TPa=35.812 — 0.106×ac.The relation of oxygen potential and manganese loss is as follows;po_2,m/TPa= 6.238 + 0.679 ×△W_([Mn])].When the flux 2 which contents of BaCO_3,MnO_2,BaF_2 and Fe_2O_3 are 60%,15%,10%and 15%respectively is used to desiliconize ferromanganese,the time corresponding to maximum rate of desiliconizaion and maximum oxygen potential is 15 min.The experimental results show that oxygen potential is controlled by C-O reaction,and that oxygen potential for desiliconization and protecting manganese are 6.238 TPa.
The oxygen potential of ferromanganese melt can be measured by oxygen concentration cell using ZrO 2 solid-EEP stabilized by CaO (M0-MoO 2 as contrast electrode). In po_2 = 20.03 - (69 548.8 + 46 427.7 × E) / T. The temperature of desiliconization is 1 350 C. BF ferromanganese was desiliconized by the flux 1 which contents of BaCO 3, MnO 2 and (Fe 2 O 3 + CaF 2) are 70%, 5% and 25% respectively. treatment time is 15 min, Fe 2 O 3 content is 12% for obtaining maximum rate of desiliconization.The relation of oxygen potential and activity of carbon is as follows: po_2, m / TPa = 35.812 - 0.106 × ac.The relation of oxygen potential and manganese When flux 2 which contents of BaCO_3, MnO_2, BaF_2 and Fe_2O_3 are 60%, 15%, 10% and 15%, respectively, the loss is as follows; po_2, m / TPa = 6.238 + 0.679 × ΔW_ ([Mn] respectively is used to desiliconize ferromanganese, the time corresponding to maximum rate of desiliconizaion and maximum oxygen p The experimental results show that oxygen potential is controlled by C-O reaction, and that oxygen potential for desiliconization and protecting manganese are 6.238 TPa.