Multi-point Thermocouple Temperature System Development And Application In Electroslag Remelting Mold

In the steel industry, the temperature measurement is a very important part. Meanwhile, the energy absorption and release through the whole process of ESR. The difference of energy release, distribution and delivery process may cause the differences among electrode melting, slag pool temperature distribution and the process of ingot solidification, which will ultimately affect the utilization rate of system’s energy and the quality of the crystal ingot. Therefore, the multi-point continuous temperature measurement technology can observe the condition of molten steel temperature changing by real-time monitoring in the mold, thus it has a direct impact on the stability operation of the ESR process and improvement the quality of crystallization.This experiment is to measure the multi-axis vertical temperature of It electroslag mold continuously, the selection of thermocouple model for experiment is the K-type sheathed thermocouple(0～1100℃), temperature measurement module is the Simatic S7-200(231-7PD22-0XA8), and the output of experiment data is under the help of V4.0Step7Micro Win Sp6, V1.0OPC Access and Simatic WinCC software,etc. A K-type sheathed thermocouple would be inserted into the copper mold wall at10mm, so as to measure its temperature. Then the data are transferred to the Simatic S7-200temperature measurement module, and thermocouple measured the potential difference value converted into ten times smaller than the actual data output. Again through V4.0Step7Micro Win Sp6and V1.0OPC Access software for data processing into the actual data to the Simatic WinCC. In the end Simatic WinCC software would be taken to make the data can be displayed in a visual way. We will cut off a rectangle outside the walls of the mold, and then bordered glass plate so as to observe the condition of cooling water flow. We can deduce the best cooling water flow by observing the amount of bubbles emergence on the wall of the mold to judge the quality of the cooling effect.The integrated heat transfer coefficient between the ingot and the mold would be work out in theory, and make the experimentally measured temperature data as boundary conditions, then as the date which substituted to the mathematical model for solving the temperature field. The process through VB programming for model meshing and its numerical calculation, in order to calculate the ESR process temperature field distribution.This paper is through the temperature measurement experiment data collection as boundary condition, then make use of VB programming calculation to simulating the ESR temperature field distribution situation,and through organic glass wall observing the mold cooling effect, revealing the ESR process heat transfer and temperature distribution which guide the actual production in terms of theory, in order to improve the effect of ingot crystallization, refine the organizational structure, improve product quality and reduce costs.