电渣重熔过程渣池流场数值模拟  

Numerical simulation of flow field of ESR slag pool

作　　者：王晓花[1] 厉英[1] 

机构地区：[1]东北大学材料与冶金学院,沈阳110819

出　　处：《材料与冶金学报》2014年第2期133-137,151,共6页Journal of Materials and Metallurgy

基　　金：国家自然科学基金资助项目(51274057);国家科技支撑计划项目(2011BAE13B03)

摘　　要：采用商业软件ANSYS和FLUENT建立了电渣重熔过程渣池流场数学模型,分析了电渣重熔过程电磁力和热浮力共同作用下渣池流动行为,以及典型电渣重熔工艺参数(电极形貌、插入深度、填充比和电流强度)对电渣重熔过程渣池内流场的影响规律.结果表明:电磁力有利于渣池内产生逆时针涡流,浮力有利于渣池产生顺时针涡流.电极端部形貌对渣池流动影响较大,当电渣重熔电流均为5 000 A,频率为50 Hz时,平头电极所在渣池内同时存在逆时针涡流和顺时针涡流,锥形电极所在渣池内只存在逆时针涡流.电极填充比和电流都对渣池内流动行为影响较大,减小电极填充比和增大电流强度都会使渣池内逆时针涡流增加.Based on the commercial software ANSYS and FLUENT, a numerical model of flow field was proposed to investigate the flow field of ESR slag pool during the ESR process, considered the effects of the electromagnetic force and thermal buoyancy. The influences of the practice parameters （ electrode tip shape, immersion depth, filling ratio and current density） on the flow field of ESR slag pool were investigated. The results showed that the electromagnetic force is beneficial for generation of the anti - clockwise circulation flow and the thermal buoyancy force is favorable to the generation of the clockwise circulation flow. The electrode tip profile has great effect on the flow field in slag pool during ESR process. When current density and current frequency are 5 000 A and 50Hz respectively, the anti - clockwise vortex and the clockwise vortex coexist into slag pool for the electrode tip with fiat shape, while only anti - clockwise vortex exists into slag pool for the electrode tip with conical shape. Also the flow flied of ESR slag is affected by the filling ratio and the current density. Decreasing filling ratio and increasing current density can enhance the anti - clockwise vortex in the slag pool.

关 键 词：电渣重熔 渣池 流场 数值模拟 

分 类 号：TG142.4[一般工业技术—材料科学与工程]