摘要
基于有限元软件,采用数值模拟的方法研究了电渣炉重熔期大电流导体产生磁场的空间分布规律.计算结果表明,磁感应强度在电极表面的分布在单导线返回电流时最大相差35.22%,双导线返回电流时最大相差13.26%,四导线返回电流时最大相差5.8%;这种磁感应强度的差别导致电极表面产生的涡流密度不均匀,进而影响电极熔化速率.从磁场对重熔工艺产生影响的角度来考虑,采用结构对称炉型可较大地减少磁场对工艺的不利影响,减少熔池内搅拌力不均匀等不利因素.分析指出,为了减少电抗造成的电能损失,消除散磁,降低电流的搅拌作用,防止出现点状偏析,同轴设计电路(同轴导电立柱、同轴电缆)将会成为电渣炉今后的发展方向.
Introducing the FEA software ANSYS in numerical simulation, the spatial distribution of magnetic field generated around a high-current conductor during electro-slag remelting was investigated. The calculated results showed that there are differences between maximum and minimum values of magnetic induction in a nonuniform distribution around electrode surface when return current happens, i. e： 35.22 %, 13.26 % and 5.8 % for single, double and four connecting wire, respectively. Such differences result in uneven eddy current density on electrode surface, which will affect the electrode remelting rate. Taking the effect of magnetic field on remelting process into consideration, the symmetrically coaxial arrangement of the furnace is introduced to greatly decrease the disadvantages resulting from induced eddy current. To reduce extra loss of energy, erase sperromagnetism, and prevent spot-like segregation and current＇s stirring action, the coaxial arrangement of ESR furnace will be the trend of ESR furnace design.
出处
《东北大学学报（自然科学版）》
EI
CAS
CSCD
北大核心
2009年第2期229-232,共4页
Journal of Northeastern University(Natural Science)
基金
国家自然科学基金和上海宝钢集团公司联合资助重点项目(50534010)
关键词
电磁场
电渣炉
结构优化
ANSYS
electromagnetic field
electro-slag furnace
arrangement optimization
ANSYS
