Device and method for in-situ observation of heat flow density of mould powder for continuous casting in phase change process

Abstract

The invention discloses a device and a method for the in-situ observation of the heat flow density of mould powder for continuous casting in a phase change process. The device comprises: a sample chamber for containing sample; a loading system for applying load to the sample from the top; a heating system for heating the sample in the sample chamber; a temperature measuring and recording assemblycomprising at least three thermocouples arranged inside the bottom wall of the sample chamber at intervals from top to bottom; a temperature data collecting system connected to the thermocouples; andan infrared thermometer for real-time temperature measurement of the sample in the sample room. A cooling loop is arranged at the bottom of the sample chamber, and the cooling loop is internally provided with cooling medium. The total thermal resistance Rtot of the tested sample, the loading system-sample interface thermal resistance Rp-s, the sample-sample chamber bottom surface interface thermalresistance Rs-w, the radiant heat transferring heat flow density at various locations and different times of the tested sample qr, and the conduction and heat transferring heat flow density qc are obtained by the computer calculating the data collected by the infrared thermometer and the temperature data collecting system.

Description

technical field [0001] The invention belongs to the technical field of high-temperature pyrometallurgy, and in particular relates to a device and a method for in-situ observation of the heat flux density in the phase transition process of continuous casting mold slag. Background technique [0002] During the pyrometallurgical production process, there will be a crystalline phase transition behavior in which the product or raw material changes from the glass phase to the crystal phase under high temperature conditions. When the crystallization phase transition occurs, the physical parameters of the medium will change, especially its optical properties, which will undergo a drastic change, resulting in a huge change in the heat transfer behavior and heat transfer performance of the medium before and after crystallization. It has a great influence on the heat transfer control and product quality control in the process of processing and fine manufacturing. For example, in the f...

AI Technical Summary

Problems solved by technology

Industrial field experiment is the most ideal method to study the heat transfer behavior of high-temperature medium, and can reproduce the actual working conditions of the target medium most accurately, but it has the following disadvantages: high-temperature fire experiment is dangerous; Huge, it is difficult to accurately control the experimental parameters and obtain real-time experimental data; the consumption of raw materials, high energy consumption and affect the normal production process, resulting in high experimental costs

Mathematical simulation research has the advantages of fast experiment speed, short process and low cost, but its fatal flaw is that it is difficult to restore the actual complex working environment of the medium, and the mathematical model is based on certain assumptions, and requires comprehensive and accurate boundary conditions And physical parameters, but the acquisition of these data is relatively limited, these factors will affect the accuracy of the simulation results, and the final results of the simulation are difficult to be comprehensive and accurate

At present, the laboratory simulation is mainly to detect and analyze the heat transfer before or after the phase change of the medium, and it is still impossible to observe and record the heat transfer during the phase change of the medium. The simulation of the conditions is also lacking

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