CaO-MgO-Fe_tO-SiO_2 系スラグと溶鉄間のりんの分配

概要

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Experiments were made to obtain phosphorus distribution ratio between molten iron and CaO-MgO-Fe_tO-SiO_2 slag in a magnesia crucible at the temperatures of 1550℃ and 1600℃. The results showed that the phosphorus transfer between iron and slag was so fast that the phosphorus equilibrium was maintained with the dissolution of magnesia from the crucible into the slag. The equations for phosphorus partitions obtained in this study are as follows. log[(%P_2O_5)/[%P]^2・(%Fe_tO)^5]=0.143[(%CaO)+0.55(%MgO)]+13980/T+16.08 log[(%P)/([%P]・(%T.Fe)^<5/2>)]=0.065[(%CaO)+0.55(%MgO)]+12230/T-10.80 These equations could be applied to CaO-MgO-Fe_tO-SiO_2 slags which were not saturated with magnesia as well as those saturated. The variation of the activity coefficients of Fe_tO and P_2O_5 with the theoretical optical basicity of slags was also discussed.
社団法人日本鉄鋼協会の論文
1986-02-01