正則溶液モデルに基礎を置く 2 乗形式による溶融珪酸塩系スラグのハイドロキシル・キャパシティの推算

概要

論文の詳細を見る
An attempt has been made to estimate the hydroxyl capacities of some molten silicates by the regular solution model of Lumsden, which has been extensively developed to be applied to slag-metal reactions in steelmaking process by the authors. The slag systems discussed were of Na_2O-SiO_2, K_2O-SiO_2, Li_2O-SiO_2, CaO-SiO_2 binaries and CaO-SiO_2-Al_2O_3, CaO-SiO_2-MgO, CaO-SiO_2-MnO and CaO-SiO_2-P_2O_5 ternaries. In the present work, it was assumed that the water vapor is dissolved in the slag as HO_<0.5>, and the hydroxyl capacity is redefined as C'_<OH>=X_<HO_<0.5>>/(P_<H_2O>/P^0)^<1/2>, where, P_<H_2O>, P^0 are partial pressure of water vapor in the gas phase and the atmospheric pressure (Pa), respectively. The interaction energies between hydrogen ion and cation i, α_<H-i>, have been derived based on the regular solution model in the present work. As the result, it has been confirmed that the model has been applicable to predict the hydroxyl capacities over the wide range of slag composition discussed. It has been found that C'_<OH> calculated by the model showed the minimum value at the slag composition of about unit basicity. The hydroxyl capacities calculated by the model have agreed with the measured within ±0.002.
社団法人日本鉄鋼協会の論文
1993-01-01