In most cases, hot metal dephosphorization slag is saturated with
dicalcium-silicate that forms complete solid solution with tricalciumphosphate;
the partition ratio of phosphorous between C2S and
liquid slag is large. In order to utilize the effect of C2S phase for the
improvement of reaction efficiency, the optimum route of the slag
composition change during dephosphorization should be clarified.
The results of the fundamental experiments about the phosphorous
partition between C2S and liquid slag from the viewpoints of equilibrium
and kinetics are reported.