0.025~0.045Al)for railway belongs in peritectic steels which was produced by 45%~60% hot metal + scrap-50tEAF-LF(VD)-caster flow sheet at special steel plant
Lai Steel. With EAF charging hot metal≥45%
adjusting oxygen supply
ensuring end carbon 0.08%~0. 10%
partly re- placing silicomanganese by steel cored aluminium for refining during EAF tapping
controlling refining basicity 4 and argon blown parameters
controlling overheating 20~30 ℃ of steel in tundish
mold water rate 180 m³/h and viscosity of shield slag0.85±0.05 Pa · s
the oxygen content in steel was lower to(15~20)×10
-6
the qualified rate of cast billet ≥ 99.95%
and the quality of steel products met the requirements of standard GB/T700- 1988.