矿热炉冶炼关键参数的电磁法检测机理研究及其产品化的实现

发布时间：2018-06-09 06:14

本文选题：矿热炉 + 冶炼关键参数　；参考：《太原理工大学》2017年博士论文

【摘要】：在矿热炉冶炼过程中,电极端部位置、电弧长度及熔池液面位置这三个参数十分关键,它影响着产品质量、冶炼能耗以及生产安全,故这些关键参数的检测至关重要。针对矿热炉冶炼过程中关键参数检测方法精度低、开发难度大的问题,本文提出了一种非接触式磁场阵列检测法。矿热炉炉内的电极电流和熔池电流产生的磁场体现于炉体外部,根据矿热炉的电磁场空间分布规律和电磁场相关理论,构建矿热炉磁场辐射模型,结合工业现场环境进行理论推导和仿真验证。采用自行设计的简易3D磁场检测系统进行了基础实验验证,并设计开发三维磁场阵列检测系统采集现场磁场信息,描绘出矿热炉炉内的电流分布特性,进而获取其冶炼关键参数信息。经仿真与现场测试发现,当阵列与电极发生相对位移10cm时,磁场阵列传感装置所采集的曲线可准确反映出其相对位移信息。现场实验结果表明,矿热炉的炉体外部确实存在电极电流和熔池电流产生的交流磁场,三维磁场阵列检测系统所采集的数据可反映出电极端部位置、电弧长度及熔池液面位置等冶炼关键参数。研制的磁场阵列传感器产品相当于为矿热炉量身定做了一个工业CT,本文提出的方法对矿热炉冶炼关键参数检测领域具有很好的实用价值。
[Abstract]:In the process of smelting, the three parameters of electric extreme position, arc length and molten pool level position are very important, which affect the product quality, smelting energy consumption and production safety, so the detection of these key parameters is very important. A non-contact magnetic field array detection method is proposed to solve the problems of low precision and difficult development of the key parameters in the smelting process of the furnace. The magnetic field produced by electrode current and molten pool current in the furnace is reflected outside the furnace body. According to the spatial distribution law of electromagnetic field and the related theory of electromagnetic field, the radiation model of magnetic field in the furnace is constructed. Combined with the industrial field environment, theoretical derivation and simulation verification are carried out. A simple 3D magnetic field detection system designed by ourselves is used to verify the basic experiment, and a 3D magnetic field array detection system is designed and developed to collect the field magnetic field information, and to describe the current distribution characteristics in the furnace. Furthermore, the key parameters of smelting are obtained. By simulation and field test, it is found that the curves collected by the magnetic field array sensor device can accurately reflect the relative displacement information when the relative displacement 10cm occurs between the array and the electrode. The field experiment results show that the AC magnetic field produced by electrode current and molten pool current does exist outside the furnace body of the furnace, and the data collected by the 3D magnetic field array can reflect the position of the electric extreme part. Arc length and molten pool level position and other key smelting parameters. The developed magnetic field array sensor product is equivalent to a kind of industrial CTs tailored for the ore-heating furnace. The method proposed in this paper has a good practical value in the field of the detection of the key parameters of the smelting process of the ore-heating furnace.
【学位授予单位】：太原理工大学
【学位级别】：博士
【学位授予年份】：2017
【分类号】：TF33;TP212

【参考文献】