Abstract: The effect of slag constituent and 2CaO•SiO2 content on the enrichment behavior of phosphorous in slag was studied by SEM and EDS. The results showed that phosphorous distributed uniformly in 2CaO•SiO2. The L_"P" ^(s/l) (phosphorus distribution ratio between solid and liquid phase of slag) increased with the increase of (SiO2+P2O5) and (FetO) content before it reached the maximum and then began to decrease. The maximum value was obtained when the (SiO2+P2O5) and (FetO) mass fraction was 20% and 70% respectively. The L_"P" ^(s/l) changed little with the ratio of 2CaO•SiO2 particles.

Key words: dephosphorous, dicalcium silicate, phosphorous distribution ratio, enrichment, slag