The effect of Na2O and K2O flux on the phosphorus partition ratio between CaO-SiO2-FetO-P2O5 slags and carbon saturated iron

摘要：

In the present study, the experiments for the phosphorus equilibrium partition between CaO-SiO2-FetO-P2O5 slags with Na2O or K2O addition and solid pure iron foil were performed at 1573, 1623 and 1673 K respectively. The experimental results showed that both Na2O and K2O addition can enhance the dephosphorization ability of CaO-SiO2-FetO-P2O5 based slags and they have similar dephosphorization ability under the same temperature and main slag composition. The phosphorous partition ratio between slag and carbon saturated hot metal increased with the increasing basicity with a peak value in the range of R around 1.3~1.5. The phosphorous partition ratio(Lp)decreased with the increasing of (w(CaO)+w(Na2O))/w(FetO) value in slags. The dephosphorization ability of CaO-SiO2-FetO-P2O5 based slags was relatively higher when the (w(CaO)+w(Na2O))/w(FetO) values fell in the range of 0.5~0.8. Lp value decreased with the temperature increase. The linear relationships between the logLp and 1/T were obtained for CaO-SiO2-FetO-P2O5 based slags with Na2O. The information provides by present study would be useful for optimization of dephoshorization in hot metal pretreatment.

关键词： Dephosphorization hot metal Na2O K2O phosphorus partition ratio

作者: Guangqiang LI Chengyi ZHU Yongjun LI Xiongyuan HUANG Min CHEN

作者单位: Key Laboratory for Ferrous Metallurgy and Resources Utilization of Ministry of Education, Wuhan University of Science and Technology, Wuhan 430081

会议类型: 国际会议

会议名称: Ninth International Conference on Molten Slags,Fluxes and Salts(第九届国际熔渣、溶剂与熔盐学术会议 MOLTEN12)

会议地点: 北京

会议语种:英文

页码: 1-12

在线出版日期: 2012-05-27（万方平台首次上网日期，不代表论文的发表时间）