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Numerical Simulation And Experimental Study On The Electromagnetic Field And Fluid Field Of Round Billet Continuous Casting Moulds

Posted on:2009-07-28Degree:MasterType:Thesis
Country:ChinaCandidate:X B WangFull Text:PDF
GTID:2121360242975003Subject:Thermal Engineering
Abstract/Summary:PDF Full Text Request
Electromagnetic stirring (EMS) is one of the key technologies in continuous casting , followed the submerged entry nozzle and protection casting, is wide applied and paid attention for stirring without touch the liquid steel. It is not only useful to improve surface and subsurface quality, improve the structure of casting blank, increase the ratio of equiaxed grainand and reduce or eliminate the bugs, such as centerline segregation and central pipe, but also is important to relax continuous casting technology, extend continuous casting steel, improve casting speed, manufacture the high quality materials. And good economic benefit was obtained.It is a complex progress, which includes heat transfer, flow and phase change. But it is difficult to analyze electromagnetic stirring process by pure theoretical method.By using finite element method, with ANSYS10.0, round billet continuous casting molds electromagnetic stirring in the Ma'anshan Iron & Steel cooperation were chosen as the research object. Then, the electromagnetic field and flow field of the round billet continuous casting molds electromagnetic stirring were the mathematic simulated. The effects of the electromagnetic parameter, copper mould thickness and such factors on the distribution of magnetic induction, electromagnetic stirring force were studied, and the distribution of velocity and temperature for liquid steel by electromagnetic stirring was also researched. The main results are as follows:1) Based on Maxwell equations, the electromagnetic field, electromagnetic force and the condition of Two-dimensional and three-dimensional in the continuous casting are expounded; the model of electromagnetic field, flow field and the temperature field in the electromagnetic stirring are formulated, according to the magnetohydrodynamics theory.2) Based on two-dimensional finite element model, with ANSYS 10.0, the electromagnetic field, flow field and the temperature field in round Continuous Casting Moulds in electromagnetic Stirring Process are studied, according to Round Billet Continuous Casting of the Ma'anshan Iron & Steel cooperation. Meanwhile, the effect of electromagnetic parameter, copper mould thickness and cross-section size also are researched.3) Based on three-dimensional finite element model, the distribution of electromagnetic field and the phenomenon of fluid flow and heat transfer in round Continuous Casting Moulds in electromagnetic stirring process are studied. It is prepares for optimizing the process parameters and the structure of submerged entry nozzle.4) By the actual measurement on-site, the finite element model of electromagnetic field, flow field and the temperature field are optimized. At the same tine, experimental data are collected for optimizing the electromagnetic parameter. Based on the mathematic simulation and experimental study, the best electromagnetic parameters of some steels are determined, and good results were obtained.
Keywords/Search Tags:mould, electromagnetic stirring, mathematic simulation, electromagnetic field, flow field
PDF Full Text Request
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