溶鉄, SiO_2-Al_2O_3-MnO-MnS 系スラグおよび MnS 基硫化物相互間の界面張力

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Interfacial tensions between liquid MnO-SiO_2-Al_2O_3 (sat) slag/liquid iron of varying sulfur content, MnS based sulfide/liquid iron, and MnO-SiO_2-Al_2O_3 (sat) slag/MnS based sulfide were studied at 1550℃ using Sessile Drop Method. The interfacial tensions, σ, between liquid MnO-SiO_2-Al_2O_3 slag/liquid iron were found to be 0.164 to 1.10N/m, depending on sulfur and oxygen contents in liquid iron and they were expressed by the following equation as a function of sulfur and oxygen activities : 1.07-σ=0.235 ln (1+10a_s+120a_s) Precipitation of MnS based sulfide under the condition of adding more than 20mass% MnS to the slag was observed to occur at the slag-metal interface. The interfacial tensions between MnS based sulfide/liquid iron as well as MnO-SiO_2-Al_2O_3 (sat) slag/MnS based sulfide were found to be 0.114 and 0.077 N/m, respectively.
社団法人日本鉄鋼協会の論文
1995-09-01