KR过程铁水包底部倾斜对铁水混匀现象影响的水模型研究  

Water modeling of the influence of bottom inclination on the mixing phenomena in KR process

作　　者：赵艳宇[1,2] 蔡新雨[1] 刘力刚 董佳鹏 张立峰 ZHAO Yanyu;CAI Xinyu;LIU Ligang;DONG Jiapeng;ZHANG Lifeng(School of Metallurgical and Ecological Engineering,University of Science and Technology Beijing,Beijing 100083,China;Steelmaking Operation Department,Beijing Shougang Co.,Ltd.,Qian'an 064404,China;School of Mechanical and Materials Engineering,North China University of Technology,Beijing 100144,China)

机构地区：[1]北京科技大学冶金与生态工程学院,北京100083 [2]北京首钢股份有限公司炼钢作业部,河北迁安064404 [3]北方工业大学机械与材料工程学院,北京100144

出　　处：《炼钢》2022年第3期1-5,共5页Steelmaking

基　　金：国家自然科学基金资助项目(U1860206,51725402)。

摘　　要：以210 t铁水包为原型建立1∶7的水模型,研究底部倾斜对KR过程铁水混匀现象的影响。研究了铁水包底部倾斜时搅拌桨转速和浸入深度对混匀时间、漩涡、液相中粒子分散和扭矩的影响,并与平底铁水包进行了对比。结果发现,包底倾斜17.5°时,混匀时间较平底时减少30.6%。搅拌桨转速为110 r/min时,浸入深度增加会导致液相中粒子分散变差,倾底铁水包中粒子分散程度优于平底铁水包。搅拌桨转速为160 r/min时,平底铁水包中粒子分散程度优于倾底铁水包。将平底改为倾底后,同工况下扭矩大幅增加。A 1∶7 scaled water model was established for a 210 t hot metal ladle to investigate the effect of bottom inclination on the mixing phenomena in KR process.The effects of bottom inclination angle,impeller rotation speed and immersion depth on the mixing time,vortex formation,particles dispersion,and impeller torque were measured and discussed.The mixing time of the ladle with a 17.5°inclined bottom was reduced by 30.6%compared with the ladle with a horizontal bottom.When the rotation speed of impeller was 110 r/min,the increase of impeller immersion depth led to poorer dispersion of particles in the ladle.The particles in the bottom-inclined ladle were more dispersed than those in the horizontal-bottom ladle.When the rotation speed of impeller was 160 r/min,particles in the horizontal-bottom ladle were more dispersed than those in the bottom-inclined ladle.The impeller torque in the bottom-inclined ladle was greatly increased under the same operation conditions.

关 键 词：KR过程 水模型 混匀时间 溶液中粒子分散 扭矩 

分 类 号：TF704.3[冶金工程—钢铁冶金]