Phosphorous Partition between 2CaO・SiO_2 Particles and CaO-SiO_2-Fe_tO Slags

概要

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The behavior of phosphorous transfer from P2O5-containing CaO–SiO2–FetO slags to 2CaO·SiO2 particles homogeneously dispersed in slag has been studied by using a microprobe analysis. The maximum phosphorus distribution ratio between 2CaO·SiO2 particle and slag is obtained at the nose composition of 2CaO·SiO2 primary phase region in CaO–SiO2–FetO phase diagram and the temperature dependence of this distribution ratio is small. The phosphorous transfer rate from slag to a 2CaO·SiO2 particle with 20 to 50 µm is considerably fast and a 2CaO·SiO2 particle changes to the particle with the composition of 2CaO·SiO2–3CaO·P2O5 solid solution within 5 s. In the case of particles present in cluster, only the rim part (5 µm) of a particle changes to the composition of 2CaO·SiO2–3CaO·P2O5 solid solution within 5 s, but small size particles with 3 to 8 µm completely change to the particles with the composition of 2CaO·SiO2–3CaO·P2O5 solid solution within 5 s.
社団法人日本鉄鋼協会の論文
2006-02-15