电磁制动下连铸结晶器内气泡行为物理模拟  

GAS BUBBLE STATISTICAL BEHAVIOR UNDER ELECTROMAGNETIC BRAKE IN CONTINUOUS CASTING MOLD

作　　者：胡暑名[1] 王洪亮[1] 张浩斌[2] 雷作胜[2] 任忠鸣[2] 邓康[2] 

机构地区：[1]宝山钢铁股份有限公司宝钢分公司炼钢厂,上海201940 [2]上海大学上海市钢铁冶金新技术应用开发重点实验室

出　　处：《上海金属》2008年第6期40-45,共6页Shanghai Metals

基　　金：国家自然科学基金50604010;上海市科委07ZR14038资助项目

摘　　要：在板坯连铸过程中由于水口吹氩,结晶器内的流场本质上是一个气-液两相流,如何通过磁场等手段优化结晶器内的流场结构改善铸坯质量,是个非常重要的问题。利用水银和氮气作为模拟介质,采用电阻探针研究气泡在结晶器内有、无磁场条件下的统计规律。实验表明,施加磁场后,水口附近的气泡占空比和气泡数量明显增加,减少了结晶器窄面附近的气泡分布。同样气体流量下,施加磁场后气泡占空比总和与无磁场条件下相比明显要大。Multiphase magneto-hydrodynamic flow phenomenon in the continuous casting process was very important. Physical modeling using mercury and nitrogen as simulator was examined. The resistance probes were applied to study the gas bubble statistical behavior with and without magnetic field. The results showed that when the magnetic field was imposed, the bubbles void fraction and number increased at zone adjacent of nozzle, the bubbles number decreased at the narrow side of mold. The total bubbles void fraction increased at the same flow volume.

关 键 词：连铸结晶器 气泡行为 两相流 电磁制动 物理模拟 

分 类 号：TF341.6[冶金工程—冶金机械及自动化] TQ051.13[化学工程]