The dephosphorizing effect of 60 t converter on 0. 03% ~ 0.27% C

0. 012% ~ 0. 024% P

0. 023% ~ 0. 036% S liquid at 1580 ~ 1680 ℃. by limestone replacing lime as slag material is tested and studied to compare the slagsteel phosphor partition ratio by limestone as slagging material with that by lime as slagging material

and to get the effect of TFe in slag

end slag basicity and liquid end temperature by limestone as slag material on slag-steel phosphor partition ratio- Lp. The results show that by limestone replacing lime as slagging material the mode of oxidizing of iron and phosphor in liquid and the dephosphorizing reaction way are same

but the dephosphorizing effect of liquid is better

that is by lime as slagging material the average Lp is 80

while by limestone as slagging material the average Lp is 101. By limestone replacing lime as slagging material the effect of dephosphorizing is best with TFe in slag 14% 〜17%

end slag basicity 3.1〜3. 4 and liquid end temperature 1600 ~1630 ℃.