CSP结晶器内卷渣的瞬态特征  

Transient slag entrapping characteristics in a CSP mould

作　　者：王现辉[1] 王新华[1] 张炯明[1] 王万军[1] 柴毅忠 洪兵雄 

机构地区：[1]北京科技大学冶金与生态工程学院,北京100083 [2]广州珠江钢铁有限公司,广州510730

出　　处：《北京科技大学学报》2009年第6期764-769,共6页Journal of University of Science and Technology Beijing

摘　　要：利用1∶1的水力学模型对双侧孔水口结构下的CSP结晶器内卷渣现象进行了模拟.结果表明:由于双侧孔水口下结晶器内液面的动态失稳现象,导致其液面卷渣呈周期性;液面失稳态时会发生连续剪切卷渣,液面卷渣有效涡主要出现在液面失稳态,拉速对液面卷渣影响较大.分析了液渣滴在结晶器内运动的瞬态特征.CSP结晶器内液面卷渣的周期性导致铸坯内大型夹杂物纵向分布差异较大.A full scale water modeling experiment was carried out for slag entrapment in a CSP funnel-shaped mould with a bifurcated SEN. The structures of the mould and SEN cause meniscus dynamic distortion phenomena of the free surface in the mould which result in periodical mould slag entrapment. The emergent distortion of the bath surface causes short time continuous entrapment by shear force and the appearance of entrapping effectual vortices. Among casting parameters, casting speed has the greatest influence on slag entrapment. The transient behaviors of movement of entrapped slag drops in the CSP mould were also studied. It is shown that periodical slag entrapment leads to a larger distribution difference of large inclusions in the casting direction of slabs.

关 键 词：结晶器 卷渣 水模型 流场 液面波动 

分 类 号：TF777[冶金工程—钢铁冶金]