大型电渣炉短网邻近钢结构感应升温的研究  

The study of temperature rise of adjacent steel structure with short network system of large scale electro-slag furnace

作　　者：单美龙[1] 王芳[1] 李宝宽[1] 赵林[2] 

机构地区：[1]东北大学材料与冶金学院,沈阳110819 [2]中国第一重型机械集团公司,黑龙江富拉尔基161042

出　　处：《材料与冶金学报》2011年第B03期135-138,146,共5页Journal of Materials and Metallurgy

基　　金：国家高技术研究发展计划资助(863计划)(2007AA03Z556)

摘　　要：大型钢锭电渣重熔中电流达数万安培,在电渣炉附近空间会形成一个强大的交变磁场,磁场内的钢铁构件,甚至混凝土中的钢筋都要产生涡流发热,即增加了网路的电能损耗,又有损于结构件的强度.本文建立了大型电渣炉短网邻近钢结构的电磁场与温度场的耦合数学模型,并考虑了不同操作电流对钢体构件温度的影响.结果表明:在钢结构内,距离导电横臂距离越近,感应电流密度和磁感应强度越大.钢结构内存在一个高温区域,最高温度出现在距导电横臂中心距离最小处.当操作电流越大,结构内的温度越高.当结构区域距导电横臂中心距离大于0.6 m处,结构的温度较低,接近于室温,电流的感应作用较弱.模拟结果对钢结构优化设计具有参考价值.The current magnitude will reach to tens of thousands of ampere in large scale electro - slag furnace, where a strong alternating magnetic field would be formed in the vicinity space of electro - slag furnace and the eddy current heating up will caused in steel structure, even steel bars in cement concrete, which not only increase network power loss, but also undermine the strength of structural parts. In this paper, a coupled mathematical model has been established on electromagnetic and temperature field of steel structure in the vicinity space of electro - slag furnace, and analysis the effect of different operating current on temperature distribution in steel structure. The results show that the closer to conductor, the stronger the induced current density and induced magnetic field intensity will be. There is high temperature zone in steel structure, where the maximum temperature appears that the minimum distance to the center of the conductor. The larger the operating current, the higher the temperature in steel column will be. When the distance to conductor is greater than 0. 6 m, the temperature in steel column is lower, close to room temperature, the induce of current is less effective. The results have important reference value on the optimal design of steel structure.

关 键 词：电渣重熔 钢结构 电磁场 焦耳热分布 温度分布 

分 类 号：TF141[冶金工程—冶金物理化学]