一种矿热炉交流磁场流路径切向探测仪的开发

发布时间：2018-09-05 16:17

【摘要】：在矿热炉正常生产过程中,炉内发生复杂的物理化学反应,强大的电流通过电极导入炉中,电极端部位置影响电弧长度,进而影响炉温和炉内化学反应速度,所以电极的插深需控制在一定范围内,不宜过深或过浅。由于矿热炉的电极电流很强,即使有炉壁的金属屏蔽效应,在炉外也必然会有反映炉内电流大小及方向的磁场信息,因此,通过获取这些磁场信息的分布就可得知电极端部等关键参数,这对于矿热炉生产过程中稳定炉况、改进工艺、降低能耗、减少事故、提高经济效益等方面具有重要的实际意义和广阔的工程应用前景。本研究设计了一种交流磁场流路径切向探测仪,根据探头两次旋转过程中所测磁场分量分析磁场流路径切向,首先探头绕方位轴转动180度,检测出该过程中磁场分量最大值位置,然后在此位置绕俯仰轴转动180度,再次检测出磁场分量最大值位置,那么最终在该位置通过指示棒即可指示磁场流路径切向。本文所做的主要工作如下:(1)探测仪的工作原理研究。首先,以矿热炉结构及磁场分布模型为出发点,引出磁场流路径切向的概念,并对探测仪数学模型进行探讨,分析磁场流路径切向的判定原理,通过两次旋转,从而将三维空间问题转化在二维平面内处理;然后,对探测仪结构进行设计,为探测仪实物及功能的实现奠定基础。(2)探测仪的系统构建及功能模块开发。首先,从机械部分实体构建与控制系统设计及实现两方面阐述了磁场流路径切向探测仪系统的总体构成,并对工程实现相关开发软件进行了简要介绍;然后,从探测仪基础功能开发与控制界面设计两方面详细介绍各功能模块的设计与实现方法,为探测仪系统集成测试做准备。(3)探测仪的系统集成测试。首先,采用旋钮电位器输出信号作为测试信号,验证了在该信号激励下的探测仪系统能够实现预期各项功能;然后在交流磁场环境中,开展磁场流路径切向探测仪的集成测试,验证了探测仪系统能够实现对磁场流路径切向的指示,而且实现了调平、启动、存储、复位、再现等各项功能,达到预期目的。
[Abstract]:During the normal production of the furnace, complex physical chemical reactions occur in the furnace. The strong electric current is introduced into the furnace through the electrode, and the electric extreme position affects the length of the electric arc, and then affects the furnace temperature and the chemical reaction speed in the furnace. So the electrode depth should be controlled in a certain range, not too deep or too shallow. Because the electrode current of the furnace is very strong, even if there is the metal shielding effect on the furnace wall, there must be magnetic field information reflecting the current magnitude and direction of the furnace outside the furnace. By obtaining the distribution of the magnetic field information, we can know the key parameters such as the electric extreme part, which can stabilize the furnace condition, improve the technology, reduce the energy consumption and reduce the accident in the production process of the furnace. It has important practical significance and broad engineering application prospect to improve economic benefit. In this paper, an alternating current path tangential detector is designed. The tangential direction of the magnetic field flow path is analyzed according to the magnetic field component measured during the two rotation of the probe. First, the probe rotates 180 degrees around the azimuth axis. The maximum position of the magnetic field component is detected in the process, and then the maximum magnetic field component position is detected again by rotating 180 degrees around the pitch axis. Finally, the tangential direction of the magnetic field flow path can be indicated by the indicating rod. The main work of this paper is as follows: (1) the working principle of the detector. Firstly, based on the structure of the furnace and the magnetic field distribution model, the concept of the tangential direction of the magnetic field flow path is introduced, and the mathematical model of the detector is discussed, and the principle of determining the tangential direction of the magnetic field flow path is analyzed. Then, the structure of the detector is designed to lay a foundation for the realization of the object and function of the detector. (2) the system construction and function module development of the detector. Firstly, the overall structure of the magnetic field flow path tangential detector system is described from the aspects of the design and implementation of the mechanical part entity construction and control system, and the relative development software of the engineering realization is briefly introduced. This paper introduces the design and implementation method of each function module from two aspects of the basic function development and the control interface design of the detector in order to prepare for the integrated testing of the detector system. (3) the system integration test of the detector. Firstly, the output signal of the knob potentiometer is used as the test signal, which verifies that the detector system under the excitation of the signal can achieve the expected functions, and then, in the alternating magnetic field environment, the integrated test of the magnetic field flow path tangential detector is carried out. It is verified that the detector system can indicate the tangential direction of the magnetic field flow path, and realize the functions of leveling, starting, storing, reset and reproducing, so as to achieve the desired purpose.
【学位授予单位】：太原理工大学
【学位级别】：硕士
【学位授予年份】：2017
【分类号】：TF33

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