底吹气泡运动行为及其对混匀影响的水模实验  

Water Model Experiment of Bottom Blown Bubble Movement Behavior and its Effect on Mixing Uniformity

作　　者：杜亭辉 冯亮花[1] 吴明涛 康小兵 Du Tinghui;Feng Lianghua;Wu Mingtao;Kang Xiaobing(School of Materials and Metallurgy,University of Science and Technology Liaoning,Anshan114051,China;Hebei Yanshan Iron and Steel Group Co.,Ltd.,qianan 064400,China)

机构地区：[1]辽宁科技大学材料与冶金学院,鞍山114051 [2]河北燕山钢铁集团有限公司,迁安064400

出　　处：《特殊钢》2024年第3期22-26,共5页Special Steel

基　　金：国家自然科学基金资助项目(52074151);辽宁省科学技术厅资助项目(2022 JH2/101300079)。

摘　　要：建立底吹金属熔池水模实验平台,采用高速摄影技术及图像处理手段,分析了狭缝宽度和底吹流量对气泡的大小、数量、速度、受力的影响规律;通过测量溶液内电导率的变化来反映溶液的混匀情况,明确底吹结构和参数对溶液的搅拌强度。结果表明,气泡运动主要受浮力和曳力的影响,气泡的索特直径随狭缝宽度、底吹流量的增大而增大,气泡越大越有利于溶液搅拌,从而缩短混匀时间,而气泡数量的变化趋势则与之相反;气泡上升速度与底吹流量成正比,与狭缝宽度成反比;结果表明,当狭缝宽度为0.30 mm,底吹流量为1.00 L/min时,混匀时间最短。The effects of slit width and flow rate on the size,quantity,velocity and force of bubbles are analyzed by establishing an experimental platform of bottom blown metal molten pool water model and using high-speed photography and image processing methods.The mixing condition of the solution was reflected by measuring the change of the electrical conductivity in the solution,so as to determine the stirring intensity of the solution by the structure and parameters of the bottom blowing.The results show that the bubble movement is mainly affected by the buoyancy and drag force,and the Sauter diameter of the bubble increases with the increase of the slit width and the bottom blowing flow rate.The larger the bubble,the more favorable the stirring of the solution and the shortening of the mixing time,while the change trend of the bubble number is opposite.The rising speed of the bubble is proportional to the bottom blowing flow rate and inversely proportional to the slit width.The experiment results show that when the slit width is 0.30 mm and the bottom blowing flow rate is 1.00 L/min,the mixing uniform time is the shortest.

关 键 词：水模实验 狭缝宽度 底吹流量 气泡运动 混匀时间 

分 类 号：TF715.1[冶金工程—钢铁冶金]