120t顶吹CO_(2)-O_(2)转炉氧枪二次燃烧射流运动模式研究  

Study on secondary combustion jet motion mode based on 120 t top-blown CO_(2)-O_(2) converter

作　　者：程钰 刘西峰 刘福海 冯超[1] 李大亮[2] 宁志国 林瑞民 李俊旗 Cheng Yu;Liu Xifeng;Liu Fuhai;Feng Chao;Li Daliang;Ning Zhiguo;Lin Ruimin;Li Junqi(University of Science and Technology Beijing;Shanxi Jianlong Industry Co,Yuncheng City)

机构地区：[1]北京科技大学碳中和研究院 [2]山西建龙实业有限公司 [3]北京科技大学国家材料服役安全科学中心 [4]北京科技大学绿色低碳冶炼与资源综合利用联合实验室

出　　处：《冶金能源》2024年第4期9-14,共6页Energy For Metallurgical Industry

基　　金：国家自然科学基金资助项目(52074024)。

摘　　要：文章运用Fulent软件,对基于120 t转炉设计超音速氧枪和二次燃烧氧枪(5孔交错式和8孔均布式)进行模拟计算,对比分析掺混10%CO_(2)后三种氧枪的射流速度分布特点和对熔池搅拌能力的影响。模拟结果表明:在L>0.57 m处,8孔均布式氧枪的主氧射流速度略小于超音速氧枪的;在L<1.05 m处,由于副孔单孔流量较大,5孔交错式氧枪的主氧射流速度最大;在1.05 m<L<1.8 m处,5孔交错式氧枪的主氧射流速度最小。研究三种氧枪的搅拌强度发现1.45 m处为最佳枪位,在该枪位下,冲击面积大小排序为8孔均布式氧枪>超音速氧枪>5孔交错式氧枪,冲击深度大小排序为8孔均布式氧枪>5孔交错式氧枪>超音速氧枪,8孔均布式氧枪的冲击深度和冲击面积均最大,对熔池冲击能力最强。The article uses Fulent software to simulate the design of supersonic oxygen lance and secondary combustion oxygen lance based on 120 t converter(5-hole staggered type and 8-hole homogeneous type),to compare and analyze the characteristics of jet velocity distribution of the three types of lances and their influence on the stirring ability of the molten pool after mixing 10%CO_(2).The simulation results show that:at L<1.05 m,the main oxygen jet velocity of the 5-hole staggered oxygen lance is the largest due to the larger flow rate of the single hole of the sub-hole;at L>0.57 m,the velocity of the 8-hole homogeneous oxygen lance is less than that of the supersonic oxygen lance;at 1.05 m<L<1.8 m,the main oxygen jet velocity of the 5-hole staggered oxygen lance is the smallest.The stirring intensity of the three types of oxygen guns was found to be the best position at 1.45 m.Under this position,the size of the impact area was ranked as 8-hole uniformly distributed oxygen lance>supersonic oxygen lance>5-hole staggered oxygen lance,and the size of the impact depth was ranked as 8-hole uniformly distributed oxygen lance>5-hole staggered oxygen lance>supersonic oxygen lance,and the 8-hole uniformly distributed oxygen lance had the largest impact depth and area,which had the strongest impact ability to the molten pool accordingly.

关 键 词：转炉 二次燃烧氧枪 CO_(2) 数值模拟 

分 类 号：TF71[冶金工程—钢铁冶金]