Preventing Rephosphorization during Tapping in BOF Steelmaking
In this study,an attempt was made to establish a technique to prevent rephosphorization during tapping when producing high carbon low phosphorus steel.Slag samples of several heats after the blowing end were taken and the compositions of several phases of slag were analyzed by EPMA.The phosphorus distributions apparently attained pseudo equilibrium among molten steel,liquid slag and 2CaO · SiO2-3CaO · P2Os solid solution (C2 S-C3 P s.s.),although the oxygen potential of slag differs from that of high carbon molten steel.The results indicated the possibility of preventing rephosphorization by controlling the phosphorus distribution ratio to high.To obtain a higher ratio of phosphorus distribution,the slag temperature was lowered by the addition of lime into molten slag after the blowing end.By adopting this technique to the commercial operation,rephosphorization during tapping becomes 1.0 x10-3 mass% P smaller than the conventional method without lime addition.
BOF steelmaking high carbon steel rephosphorization multi phase fluxes
Takashi Abiko Takashi Sugitani Atsushi Tazuke Takamitsu Nakasuga Sei Kimura
Steelmaking Development Section, Ironmaking & Steelmaking Development Department R&D Laboratory, Iron & Steel Business, KOBE STEEL, LTD.222-1, Ikeda, Onoe-cho, Kakogawa, Hyogo, 675-0023, Japan
国际会议
The 4th Australia-China-Japan Joint Symposium on Iron and Steelmaking(第四届中日澳钢铁冶金学术会议)
沈阳
英文
193-198
2012-11-03（万方平台首次上网日期，不代表论文的发表时间）