Study and Application of Bottom Blowing Technique of Combined Blowing Converter

作     者：Li-bin YANG Liu LIU Xing-li JIAO Pu-qiao TONG 

作者机构：Central Iron and Steel Research Institute No.4Steelmaking and Rolling General PlantMasteel 

出 版 物：《Journal of Iron and Steel Research International》 (Journal of Iron and Steel Research, International)

年 卷 期：2014年第21卷第1期

页      面：41-45页

核心收录：

学科分类：080602[工学-钢铁冶金] 08[工学] 0806[工学-冶金工程] 

主　　题：combined blowing bottom nozzle maintenance technique water model product of carbon and oxygen 

摘      要：The water modelling experiments of 300 t converter concerning combined blowing parameters, the number, and configuration of bottom nozzles are carried out. The results show that the arrangement of 16 bottom nozzles at 0. 40D and 0. 45D （hearth diameter） concentric circles is the reasonable solution. The combined blowing steel- making technique of 300 t converter has been developed through experiments and studies relating to optimizing the top-bottom combined blowing pattern, the number and configuration of the bottom nozzles, the type selection of bot- tom nozzle, and bottom nozzle maintenance techniques. The results show that the product of w[c] ＂ w[o] at endpoint is reduced from 0. 002 62 to 0. 002 43, average TFe content is decreased by %, phosphorus distribution is raised from 70.85 to 78.95, sulfur distribution is raised from 3.43 to 4.32 and manganese content is raised by 0.02%.