转炉氧枪射流融合距离的数值研究及工业应用

Numerical Research And Industrial Application On Fusion Distance Of Oxygen Lance Jet In Converter

融合距离是研究多股射流特性的一个重要指标,不仅可以直接反应射流的偏移程度、射流刚性,也可以体现对熔池的搅拌程度。本研究在前人工作的基础上修正了融合距离的计算方法,通过CFD数轴模拟对修正后的融合距离进行了重新计算,确定了260 t转炉用氧枪在不同喷嘴倾角下的融合距离。结果发现:氧枪喷头夹角越大,射流融合距离越大。将融合距离与现场冶炼经验相结合,确定了喷孔夹角为16°的氧枪为最优方案,对应实际吹炼过程的化渣枪位为2.78 m。研究内容对现场吹炼化渣枪位的指导具有实际意义。

The fusion distance is an important index for studying the characteristics of multiple jets,which can not only directly reflect the offset degree and rigidity of jets,but also reflect the degree of stirring of molten pool.Based on the previous work,this study modifies the calculation method of fusion distance.The modified fusion distance was recalculated through CFD digital axis simulation,and the fusion distance of 260 t converter oxygen lance at different nozzle angles was determined.The results show that the greater the included angle of oxygen lance nozzle is,the greater the jet fusion distance is.Combining the fusion distance with the on-site smelting experience,the oxygen lance with an included angle of 16°is determined as the optimal scheme,and the slag melting lance position corresponding to the actual blowing process is 2.78 m.The research content has practical significance for guiding the lance position of blowing refining slag.