Abstract: Based on 260-ton top blowing converter of a steel works, the 1：7 physical model is established, and the interaction between the innovated double-structure oxygen lance and the molten pool is analyzed. The depth, width and stirring intensity of cavity under different impacting conditions are discussed and the results are compared with those of traditional oxygen lance. It is found that the cavity depth formed by the interaction between the new nozzle and the molten pool is almost equal to that of the traditional nozzle. At design flow and the lance height H = 35 de, the maximum cavity depth formed by the innovated nozzle is 147 mm； as compared with traditional lance at different lance height the average impact cavity diameter by innovated lance increases by 22%. The corresponding optimal operating lance position is 35 ~40 de under the design flow.

摘要： 以钢厂260t顶吹炼钢转炉为研究对象,建立了1:7的物理模型,分析了新型双结构氧枪喷头与熔池作用的交互作用,讨论了不同工况下的冲击坑深度和宽度以及射流对转炉熔池的搅拌强度,并将结果与传统结构氧枪喷头进行比较。结果表明,新型喷头与熔池作用形成的冲击坑深度与传统氧枪喷头的差别不大,设计流量下,枪高为H=35de时,新型喷头形成的冲击坑深度最大为147mm;不同枪位下,新型氧枪射流冲击坑直径比传统氧枪射流冲击坑直径平均增加22%;新型喷头的射流对熔池的搅拌效果好于传统喷头,设计流量下的最佳操作枪位为35～40de。

关键词: 双结构氧枪, 转炉熔池, 冲击坑, 混匀时间, 水模实验