氧气转炉的氧枪喷头优化及操作改进

Optimization of oxygen lance nozzle and operation improvement for BOF

为使转炉冶炼与连铸生产更好地匹配,通过对80t转炉氧枪喷头和顶底吹的操作改进,使供氧时间平均缩短了1.5min,并减少了冶炼终点钢水溶解氧和渣中铁损。同时评估氧气射流冲击熔池的深度、吹炼过程渣成分的演变以及钢水的氧化性,提出了终点钢水溶解氧含量与指数VO2/w[C]以及转炉炉龄之间的关系。

In order to make converter steelmaking match well with continuous casting production, oxygen supply time of the 80 t converter was shortened by an average of 1.5 min through structure optimization of oxygen lance nozzle and operation improvement of top and bottom blowing, and meanwhile the dissolved oxygen content in molten steel and iron loss in slag were reduced at the smelting end. The oxygen jet impinging depth of molten bath, the change of slag composition and the oxidizability of molten steel were evaluated. The relationship among the final dissolved oxygen content of molten steel, the index VO2/ω[C] and the service life of converter was analysed.