120t复吹转炉底吹布置对熔池混匀的影响  

Effect of bottom blowing tuyeres arrangement on mixing of molten steel in a 120t combined blowing converter

作　　者：储焰平 袁晓峰[1] 葛君生[1] 封伟华[1] 杨利彬[2] CHU Yanping;YUAN Xiaofeng;GE Junsheng;FENG Weihua;YANG Libin(Steelmaking Branch,WISDRI Engineering&Research Incorporation Ltd.,Wuhan 430223,China;Central Iron and Steel Research Institute,Beijing 100081,China)

机构地区：[1]中冶南方工程技术有限公司炼钢分公司,湖北武汉430223 [2]钢铁研究总院,北京100081

出　　处：《炼钢》2023年第3期25-29,共5页Steelmaking

摘　　要：转炉底吹的布置和流量控制对转炉熔池混匀的影响至关重要,是决定碳氧反应、脱磷反应的动力学条件。为了给国内某钢厂120t转炉的底吹供气元件布置方式提供理论依据,通过水模试验,研究了不同底吹布置方案及底吹流量对熔池搅拌均匀混合时间的影响,为确定最优底枪布置方式提供参考。结果表明,在保持其他参数一致的条件下,转炉底吹采用环形布置,底枪夹角为40°、底吹半径R=0.55 D的混匀效果较好;通过比较发现,非对称布置混匀效果要优于环形对称布置。实际应用过程中,若考虑对炉龄的影响,建议选择环形对称布置方式(夹角40°、R=0.55 D);若忽略对炉龄的影响,建议选择非对称布置方式。The arrangement of bottom blowing tuyeres and the control of flow rate are very important to the mixing of molten steel in the converter,which determine the kinetic conditions of carbon-oxygen reaction and dephosphorization reaction.In order to provide a theoretical basis for the arrangement of the bottom blowing tuyeres of a 120t converter in a domestic steel plant,the effects of bottom blowing arrangement scheme and bottom blowing flow rate on the mixing time of the steel bath were experimentally studied through water model experiments,providing a reference for determining the optimal bottom blowing arrangement.The results show that,under the condition of symmetric arrangement of tuyeres and same parameters,the mixing effect is better when the included angle of bottom tuyeres is 40°and their locations are at R=0.55 D.By comparison,the mixing effect of asymmetric arrangement is better than that of symmetric arrangement.Therefore,in actual application process,when considering the furnace life,it is recommended to select the symmetric arrangement(included angle of 40°,R=0.55 D);when ignoring the influence to the furnace life,it is recommended to choose the asymmetric arrangement of the bottom blowing tuyeres.

关 键 词：复吹转炉 底吹孔布置 非对称吹气 混匀时间 

分 类 号：TF715[冶金工程—钢铁冶金]