Design and Research of Oxygen Lance in Dephosphorization Converter
LU Wen-gang1, L Ming1,2,PAN Hong-tao2,ZHU Rong1,WANG Hui-zhi1,LIU Yu1
1. School of Metallurgical and Ecological Engineering， University of Science and Technology Beijing， Beijing 100083， China 2. Steelmaking and Continous-Casting Division, MCC Capital Engineering and Research Incorporation Limited， Beijing 100176， China
Abstract：Special oxygen lance for dephosphorization was used in dephosphorization converter in order to promote slagging improving dephosphorization rate and to realize the pretreatment of dephosphorization. Four-hole dephosphorization oxygen lance with the Mach number of 1.9 and flow rate of 14500m3/h was designed, whose velocity field, temperature field and density distribution were simulated by Fluent software. It is found that oxygen jet speed is about 115 m/s at the lance height of 1.5m, when jet speed is 100m/s, the maximum jet radius is 0.28m. Based on the simulations, the dephosphorization oxygen lance was used in 120t converter smelting process, which has obtained some good smelting effects. The end-point temperature should be controlled at 1370℃ or so. The mass percent of end-point carbon in dephosphorization converter must be more than 2.8% to satisfy the heat requirements of decarburization converter. The average mass percent of phosphorus in semi-steel is 0.018% and dephosphorization rate can be reached 79.2%. Compared with the traditional single slag process, this steelmaking technology can not only reduce the phosphorus content, but also guarantee the stability of dephosphorization.
收稿日期: 2013-05-02
出版日期: 2014-05-07
引用本文:
路文刚，吕明 ，潘宏涛，朱荣，王慧知，刘煜. 脱磷专用转炉的氧枪设计及研究[J]. 钢铁, 2014, 49(5): 36-41.
LU Wen-gang, L Ming,,PAN Hong-tao,ZHU Rong,WANG Hui-zhi,LIU Yu. Design and Research of Oxygen Lance in Dephosphorization Converter. Iron and Steel, 2014, 49(5): 36-41.
2014, Vol. 49 
