The slag pool is a complex system which gathers electromagnetic field,thermal field and flow field in the process of electroslag remelting(ESR)for production of large slab ingots.In this manuscript,mathematic foundation and boundary conditions of the numerical simulation for thermal field in the ESR process of large slab ingots were analyzed,and mathematic model of heat generation in the slag pool and the solidification in the metal molten pool were founded by using the finite element software ANSYS.According to the simulation results,it can be found that the temperature distribution in the process of ESR for production of large slab ingots with double electrode series is different from that in the electroslag furnace with a single electrode.The region of the biggest current density and the highest temperature in the electroslag furnace with a single electrode is below the electrode,while the same region in the process of ESR with the double electrode series for production of large slab ingots locates between the two electrodes.The depth of the metal pool and the temperature of the slag bath simulated by mathematical model were close to the measured value in the experimental process,which verifies the reliability of the simulation method and the model,and it will provide a theoretical basis for the quality control of large slab ingots in the process of ESR.
The process of Electrical slag surfacing with liquid metal(ESS LM)is a complex physical and chemical process including electric field,magnetic field,flow field and temperature field,etc.As the complicated technology and high cost of manufacturing compound rolls,simulating the relationship between ESS LM process parameters and physical fields of ESS LM process is important.Through the numerical simulation of finite volume method to the process of ESS LM in the conditions of different roll core diameters,slag amount,pouring speed,pouring temperature and input power,temperature field and flow field in different conditions were obtained.When the diameter of core material,operation voltage,pouring rate,pouring temperature and slag height of conductive mold was 250mm,40V,8mm/min,1750K and 50mm respectively,the depth of molten metal was 30mm and fusion thickness of core material was 5mm which was consistent with the experiment results.According to the simulation results,operation with voltage of 42V,cladding speed of 10mm/min,pouring temperature of 1760K and slag height of 54mm in the conductive mould,achieved much more shallow metal pool,which is beneficial to vertical crystallization.
LI Wan-mingGENG XinLI Hua-bingYi Gao-songFENG HaoJIANG Zhou-hua
