CaO-SiO_2-MgO-Fe_tO 系スラグと溶鋼間のりんおよび酸素分配測定と上下吹き転炉の終点りん濃度の推定

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The phosphorus and oxygen distribution between CaO-SiO_2-Fe_tO slag and molten steel has been obtained in the temperature range from 1600 to 1700℃. They can be expressed by the following equations. log[(%P_2O_5)/{[%P]^2(%Fe_tO)^5}]=11.20 log{(%CaO)+0.3(%MgO)-0.05(%Fe_tO)}+29600/T-36.25 (i) log(γ_<Fe_tO>)=0.0257(%SiO_2)-0.300 (ii) It has become clear that phosphorus and oxygen distribution between slag and molten steel at end point of 250t top and bottom blowing converter has attained equilibrium by investigating the data at end point on the basis of equations (i) and (ii). Solving the phosphorus distribution equilibrium and the mass balance equations has made it possible to estimate phosphorus content at end point with high accuracy.
社団法人日本鉄鋼協会の論文
1991-10-01