ISIJ International
Online ISSN : 1347-5460
Print ISSN : 0915-1559
Regular Article
Phosphorous Partition between 2CaO·SiO2 Particles and CaO–SiO2–FetO Slags
Ryo InoueHideaki Suito
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2006 Volume 46 Issue 2 Pages 174-179

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Abstract

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.

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© 2006 by The Iron and Steel Institute of Japan
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