电渣重熔过程中熔滴滴落的影响因素  

Effect of Multiple Factors on Droplets During Electroslag Remelting Process

作　　者：董艳伍[1] 陈浩禹 李想[1] 吴镇湘 

机构地区：[1]东北大学冶金学院,辽宁沈阳110819

出　　处：《东北大学学报（自然科学版）》2016年第11期1564-1568,1577,共6页Journal of Northeastern University(Natural Science)

基　　金：国家自然科学基金资助项目(51274266);国家自然科学基金委员会-宝钢集团有限公司钢铁联合研究基金资助项目(U1360103);中央高校基本科研业务费专项资金资助项目(N150202003)

摘　　要：采用VOF方法来追踪钢渣两相界面,磁流体力学模块(MHD)来加载电流、电压对电渣重熔过程中熔滴滴落行为进行数值模拟.结果表明:电渣重熔过程中自耗电极端部熔滴的数目随着充填比的增加而增多;熔滴的尺寸随着自耗电极端部形状和界面张力的增加而增大.然而,熔滴的尺寸和数量随着输入电流的增大而减小.而且一些尺寸较大的熔滴在滴落的过程中受到了电磁力、重力以及浮力等力作用被分裂成几个尺寸较小的熔滴.从自耗电极端部滴落的熔滴不具有对称性,从而导致了渣池的流场不对称性.Magnet-hydr-dynamics (MHD) module loading current and voltage coupled with a VOF (volume of fluid) model for the phases (i. e., steel and slag) distribution have been employed to investigate the formation of droplet during electroslag remelting. The results indicate that the amount of droplets increase with the increasing of filling ratio and the dimension of droplets increase with the increasing of electrode tip angle and interfacial tension. However, the amount and dimension of droplets decrease with the increasing of input current. Some large droplets could be tore into pieces by various forces including electromagnetic force, gravity, buoyancy and so on. In addition, multiple unsymmetrical eddies exist due to stochastic droplet dripping and uneven thermal field distribution. © 2016, Editorial Department of Journal of Northeastern University. All right reserved.

关 键 词：电渣重熔 熔滴 数值模拟 充填比 界面张力 

分 类 号：TF142.3[冶金工程—冶金物理化学]