溶銑処理温度における Na_2O-SiO_2-FeO 系スラグと炭素飽和溶鉄間のりんの分配平衡(脱りん・脱硫 : ソーダ系スラグ)(<特集>溶銑処理の発展)

概要

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The equilibrium distribution of phosphorus between Na_2O-SiO_2-FeO melts and carbon-saturated iron was indirectly measured at 1300℃ using a solid iron strip. The results are summarized as follows : 1) The logarithm of the phosphate capacity increases from 19.5 to 24.8 with increasing the basicity index (X_<Na_2O>+X_<Na_2CO_3>/X_<SiO_2>+X_<PO_<2.5>>+X_<FeO_<1.5>>) from 0.7 to 1.2. 2) Iron oxide decreases the phosphate capacity of the slags like in the case of CaO-bearing systems. 3) The phosphate capacity of the slag practically used in the soda-ash treatment is confirmed to be very high, and the log C_<PO_4>^<3-> is estimated at 31. 4) The P_o_2 at the slag-metal interface in the practical treatment is estimated at 10^<-15>∿10^<-16> atm which would be much lower than when CaO-base slag is used.
社団法人日本鉄鋼協会の論文
1983-11-01