Abstract: According to real production situation of an 180 t top and bottom combined blown converter at Anshan Steel, a supersonic jet oxygen lance has been designed to carry out water modeling test, in order to avoid the problem of revising lance position which is caused by subsonic jet oxygen lance. The test was carried out by 10:1 water model with insuring constant optimum bottom blown process parameter (4 hole symmetry, bottom blowing flowing rate 0.70 m³/h) , changing flowing rate (38~42 m³/h) and lance blowing position ( 130~210 mm) of top lance. Results showed that optimum process parameters for water model were lance position 150 mm and flowing rate 39 m³/h.

Key words: 180 t Top-Bottom Combined Blow Converter, Oxygen Lance Design, Flowing Rate, Lance Position

摘要： 根据鞍钢180 t复吹转炉的实际生产情况,设计了超音速射流氧枪并进行水模型实验,避免了亚音速射流氧枪所带来的氧枪枪位修正问题。通过10:1水模型,保证最佳的底吹工艺参数不变(4孔对称,底吹流量0.70 m³/h),改变顶吹氧枪的气体流量(38～42 m³/h)和吹炼枪位(130～210 mm)进行实验。结果表明:水模型最佳的工艺参数是枪位150 mm,流量39 m³/h。

关键词: 180 t顶底复吹转炉, 氧枪设计, 流量, 枪位