酸化鉄含有スラグ-高炭素濃度溶鉄間りん反応における界面酸素ポテンシャル

概要

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Oxygen potential at slag-metal interface, P_<O_2>^*, is determined from the experimental results of the authors' previous study on phosphorus reaction kinetics between high carbon concentration iron melt and iron oxide containing slag. The P_<O_2>^* value is calculated on the assumption that quasi-equilibrium is attained when transition in the phosphorus reaction occurs from dephosphorization to rephosphorization. The oxygen potential at the slag-metal interface, P_<O_2>^*, is obtained as 10^<-16>∿10^<-15> atm. P_<O_2>^* increases with increasing Fe^<3+>/(Fe^<2+>+Fe^<3+>) in the slag phase or the partial pressure of oxygen in the atmospheric gas, while P_<O_2>^* decreases with the increase in the rotating speed of mechanical stirrer. The oxygen potential in the slag bulk, P_<O_2>, is calculated on the basis of regular solution model, and is found to be 2 or 3 orders of magnitude greater than P_<O_2>^* at the slag-metal interface. Comparison is made between the P_<O_2>^* values determined from the data of the experimental study and those obtained from mathematical model calculation which simulates the simultaneous reactions of phosphorus and carbon. Fairly good agreement between the two is obtained.
社団法人日本鉄鋼協会の論文
1990-09-01