摘要
通过考虑气液两相流动过程中阻力、尾迹脱落、气泡摆动等气泡运动引起的液相湍流脉动及两相间湍流的相互作用,建立了可准确描述VD真空精炼过程气液两相流动的数学模型,研究了多喷嘴底吹对钢包内气液两相流场和熔池混合效率的影响,优化出了多喷嘴底吹条件下的最佳喷吹模式和吹气流量.结果表明:与双喷嘴和四喷嘴底吹相比,在相同条件下三喷嘴底吹时,钢液的流动更均匀,流动死区较小,熔池混合效率最高,此时采用3∶2∶1非均匀供气模式、100 L/min的底吹氩气流量可获得最优熔池动力学条件.
A mathematical model that enables to describe accurately the gas⁃liquid flows in VD refining process was established by including the gas and liquid two⁃phase turbulence interaction and the liquid phase turbulence fluctuation caused by bubble motion such as drag force,wake shedding and bubble swing.Based on the model,the effects of multi⁃tuyeres blowing on gas-liquid flows and mixing efficiency in molten bath in ladle were studied,and the injection mode as well as the gas flow rate under the condition of multi⁃tuyeres blowing were optimized.The results show that a more uniform flow field,a smaller dead zone of flow and a higher mixing efficiency were obtained for the three-tuyeres blowing,compared with the two⁃tuyeres and the four⁃tuyeres blowing conditions.In this case,the optimal dynamics conditions in the molten bath were obtained by using the differential gas injection mode of 3∶2∶1 at the blowing argon flow rate of 100 L/min.
作者
杨宇
李明明
余珊
邵磊
邹宗树
Yang Yu;Li Mingming;Yu Shan;Shao Lei;Zou Zongshu(Key Laboratory for Ecological Metallurgy of Multimetallic Mineral(Ministry of Education),Northeastern University,Shenyang 110819,China;School of Metallurgy,Northeastern University,Shenyang 110819,China;School of Metallurgy Engineering,Liaoning Institute of Science and Technology,Benxi 117000,China)
出处
《材料与冶金学报》
CAS
北大核心
2022年第4期261-267,共7页
Journal of Materials and Metallurgy
基金
国家自然科学基金资助项目(51904062)
中国博士后科学基金资助项目(2019M650056)
中央高校基本科研业务费专项资金资助(N2025015).
关键词
多喷嘴底吹
供气模式
混合效率
VD真空精炼
multi⁃tuyeres
gas injection mode
mixing efficiency
VD
mathematical model
