Numerical Simulation Of Electromagnetic Field And Temperature Field In Medium-frequency Induction Furnace Melting Process

Smelting is the most important part of the casting production, and the smeltingquality determines the performance and processing cost. The Medium-frequency furnacedraws a lot of concern due to its advantages of big power, fast speed and low powerconsumption. Thus, its applications are becoming more and more widely. However, it isunder the condition of high temperature, severe reaction, and it is difficult to observe thereal smelting process. In addition, there are not many systematic researches on thesmelting process. Therefore, it is significant to carry out research on medium-frequencyfurnace smelting. The successful application of this article will not only has greattheoretical value, such as realize the medium-frequency furnace smelting visualization andquantitative research of related physical quantities, but also has great engineeringapplication value, such as optimize furnace type, shorten the time of smelting, reduceenergy consumption, improve the quality of castings. It will maybe promote thedevelopment of China foundry industry, realize the green casting and low energyconsumption and reduce energy consumption of the unit value.This article researched the main method of iron melting, the medium-frequencyfurnace smelting process, and focused on the numerical simulation of the electromagneticfield and temperature field in the process. First, this article studies the principle of thesmelting process and mathematical model of the electromagnetic field and the temperaturefield.Then, on this basis, the governing equations of electromagnetic are established by themethods of coupling with the complex magnetic vector and electric scalar potential. Thisarticle deduces and gives the discretized solving equations by finite difference as well asthe boundary conditions and initial conditions and the convergence conditions. In addition,this article gets the coupled control equations of electromagnetic field and the temperaturefield using the basis of the Fourier heat transfer law and energy conservation. Then itsolves the discretized solving equations by finite difference and gives relevantconvergence conditions. This article checks the simulation results of the electromagnetic field and temperaturefield by the standard of the skin effect and edge effect. The distribution of the magneticinduction intensity under the conditions of different frequency and current with thedirection of the radius is discussed. Then power absorption distribution of the unit grid isdiscussed. Finally, the burden temperature distribution in the smelting process, smeltingcharacteristics and the influence of frequency and current on the temperature distributionare analyzed.