【作者】 王岳；

【导师】 刘喜海；

【作者基本信息】 东北大学 ， 钢铁冶金， 2008， 硕士

【摘要】 随着电渣冶金技术的不断发展,为了进一步优化工艺,降低成本,提高生产效率和产品质量,需要研究人员对整个重熔过程的物理化学现象和传输过程有更加精确的把握和理解。在这样的背景下,数值模拟就成为了电渣重熔研究中一种非常重要的研究手段。本文以某公司小型电渣炉为研究对象,对该设备生产过程中产生的磁场和渣池发热过程进行了数值模拟。本文针对电渣重熔过程的磁场和渣池发热过程分别建立模型,使用通用有限元分析软件ANSYS 11.0作为工具,在给定的重熔条件下,对给定模型的磁场和渣池发热进行了计算和数值模拟。磁场模拟部分,整个渣池区域内,磁感应强度的值约在1.904x10-3T-2.4052x10-2T范围内。渣池发热模拟部分,渣池区域内温度范围为1490℃-1800℃。数值模拟结果与前人的研究结果及厂方提供的实测数据吻合较好,从而验证了模拟结果的可靠性。研究表明,在电极轴向位置上各点的磁感应强度在两端处大并且变化较大,中间磁感应强度最小,磁感应强度的总体趋势是随距离的增加而减弱,电渣重熔过程中渣池的温度场分布和电场分布直接相关,电渣炉的电流密度和温度最大的区域在电极下部。随着对模型的进一步研究,其模拟准确性可以进一步提高。本文提出的模型和计算的数值模拟结果可以作为一个基础的理论研究,为后续实验研究和实际生产提供指导,并作为研究电渣重熔电磁搅拌工艺优化的基础。更多还原

【Abstract】 With the development of Electroslag metallurgy technology, it is necessary for the relative researchers to care more about remelting process to get a better understanding on its Physical & Chemical phenomena and transmitting process, which aims to optimize process, keep down the coast of production, and increase productive efficiency and product quality. However, which came from the traditional measurements and experimental methods would not provide sufficient data and theory. Under the circumstances, Numerical simulation bloomed into an important method for electroslag remelting research. Therefore, in this thesis, attention is concentrated that the rule of magnetic field and heat generation of slag bath was investigated by numerical simulation based on a small electro-slag furnace offered by a certain company.For the project, two of models were built for magnetic field and heat generation of slag bath respectively which were simulated by ANSYS 11.0 under the given remelting condition.During the experimentation, the value of magnetic flux density is about from 1.904x10-3T to 2.4052x10-2T and the temperature of Heat Generation of Slag Bath is about 1490℃to 1800℃in the region of whole slag bath. The results of Numerical Simulation tally with the data provided by the company which prove the reliability of simulation.Research indicates that the magnetic induction intensity changes in the way of biggest in the ends and smallest in the middle, in general, it is weaken along with the distance increase in the axial position. In the Electro-slag Remelting process, the slag bath temperature field distribution related directly with the electric field distribution and the biggest region of the current density and temperature of electroslag is distrib- uted in electrode lower part. The simulation accuracy could be improved by the deep research to these models. The results got from this project provide a guide for the related experiment and production in fact and give some basic information for investigating the technological optimization of Electro-slag remelting.更多还原