Method for follow-up testing of temperature of steel billet in furnace

Abstract

The invention relates to a method for follow-up testing of temperature of a steel billet in a furnace, which comprises the steps of primary preparation and the steps of follow-up testing in the furnace. The primary preparation comprises the following concrete steps: (1) drilling a hole on the steel billet to be tested; (2) inserting the hot end part of a thermocouple into the hole drilled in the step (1), and enabling the hot end of the thermocouple to be in contact with the bottom of the hole; filling and compressing the residual space in the hole by the iron powder of which the material is the same as the material of the steel billet to be tested; and (3) connecting the measuring end of the thermocouple to a temperature recorder, enabling the temperature recorder and the steel billet to together enter the furnace, and then, carrying out the steps of follow-up testing in the furnace. The method of the invention can improve the accuracy and the reliability of temperature testing of the steel billet.

Description

technical field [0001] The invention relates to a temperature measurement method, in particular to the technical field of thermal measurement, in particular to a method for on-line measurement of the surface and internal temperature of a billet in a high-temperature heating furnace in the iron and steel industry. Background technique [0002] In order to study the heating system and temperature system of the heating furnace, formulate and optimize the reasonable heating process system of the billet, it is necessary to conduct direct online continuous measurement of the surface and internal temperature of the billet during the heating process in the furnace, which is beneficial to truly understand the heating situation of the billet in the furnace , can be used in many aspects such as heating furnace function assessment, mathematical model coefficient extraction and model verification, heating problem diagnosis and heating process optimization. [0003] At present, radiation ...

AI Technical Summary

Problems solved by technology

The disadvantage of using a radiation pyrometer to measure temperature is that it can only measure the approximate value of the surface temperature of the billet. Due to the influence of the high temperature environment in the heating furnace and the surface is surrounded by a layer of oxide scale, the measured surface temperature of the billet is different from the actual temperature of the surface. Far, much more difficult to measure billet internal temperature

When fixing the thermocouple, it is generally used to weld the nut to compress the couple or wedge into the iron sheet, steel sleeve and other measures to fix it. Because the steel billet has to go through the movement process of stepping (pushing steel) and other equipment during the test, it is severely impacted by other equipment, and Thermocouples and fixtures are heated and deformed due to thermal stress, and thermocouples are easy to loosen or even fall off, thus affecting the temperature measurement accuracy

[0007] It can be seen from the above that in the on-line measurement technology of billet temperature in the furnace, the existing thermocouple types and their installation and fixing methods have certain disadvantages, which affect the reliability and accuracy of measurement.

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