Abstract: Anshan Iron and Steel Company 180 t top-bottom combined blowing converter is considered as prototype in this article, the hydraulic model tests of traditional jet and coherent jet to bath were carried on by designing supersonic jet oxygen lance . The best mixed time was 12.6 s which was obtained by traditional jet water model experiment. Hie interaction between coherent jet and bath was simulated by reducing oxygen lance position, which was carried under the condition of keeping the best top blown gas flow rate is constant. The results shown that: the mixing time was 11.8 s when the lance position was reduced to 40 mm. This showed that the coherent jet flow oxygen lance may achieve the result of top-bottom converter stirring effect. In that case, the bottom blowing system of converter could be canceled, the converter equipment can be simplified, and the converter lining life can be improved.

Key words: 180 t Top and Bottom Combined Blowing Converter, Supersonic Jet, Coherent Jet, Mixed Time, Flow Rate of Gas, Oxygen Lance Position, Hydraulic Model Experiment

摘要： 以鞍钢180 t顶底复吹转炉为原型,设计超音速氧枪喷头进行了复吹转炉传统射流与聚合射流对熔池相互作用的水力学模型实验。超音速射流水模实验确定最佳的均混时间为12.6 s;在保持最佳顶吹气体流量的条件下,以降低枪位模拟聚合射流对熔池的相互作用。结果表明:当氧枪枪位下降到40 mm时,均混时间为11.8 s,这说明聚合射流完全可以达到传统射流对熔池的搅拌效果,可取消底吹系统,简化转炉设备和提高转炉炉龄。