Tundish molten steel superheat monitoring method and system based on embedded fiber bragg grating

By embedding fiber optic grating sensors in the tundish to construct a distributed temperature measurement network, and combining a three-dimensional heat transfer model and intelligent data fusion algorithm, the problems of lag and inconsistency in tundish steel temperature monitoring were solved, enabling real-time and accurate monitoring of temperature field distribution, and improving the quality of billets and the level of intelligence in continuous casting process.

CN122274100APending Publication Date: 2026-06-26UNIV OF SCI & TECH BEIJING
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
UNIV OF SCI & TECH BEIJING
Filing Date
2026-03-03
Publication Date
2026-06-26

AI Technical Summary

Technical Problem

Existing technologies for measuring the temperature of molten steel in the tundish suffer from problems such as lag, discontinuity, inconsistent measurement results, and safety issues. They cannot achieve continuous and reliable monitoring of the temperature field distribution and lack quantitative assessment of the temperature field uniformity, resulting in poor billet quality and continuous casting process stability.

Method used

An embedded fiber optic grating sensor is used to construct a distributed temperature measurement network. Combined with three-dimensional heat transfer mechanism and intelligent data fusion algorithm, a temperature correction model and parameter correction mechanism are used to realize real-time and accurate monitoring of molten steel temperature and calculation of superheat. Key parameters are dynamically adjusted to adapt to material aging and changes in operating conditions.

Benefits of technology

It enables real-time, accurate, and long-term stable monitoring of molten steel temperature in the tundish, improving the stability of billet quality and the precision of continuous casting process control, reducing reliance on manual labor, lowering safety risks, and enhancing the intelligence level of the continuous casting process.

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Abstract

This application relates to the field of continuous casting technology in iron and steel metallurgy, and discloses a method and system for monitoring the superheat of molten steel in a tundish based on embedded fiber Bragg gratings. The method includes: embedding fiber Bragg grating sensors in multiple representative areas of the refractory material in the tundish to form a distributed temperature measurement network; collecting refractory material temperature data at each measuring point in real time; preprocessing the refractory material temperature data; constructing a temperature correction model based on a three-dimensional heat transfer mechanism; inputting the preprocessed refractory material temperature data into the temperature correction model; calculating the estimated local molten steel temperature at each measuring point; inputting the estimated local molten steel temperature into an intelligent data fusion algorithm; comparing the estimated local molten steel temperature with the manually measured value; setting trigger conditions; dynamically adjusting key parameters of the model and providing feedback optimization when the conditions are met; recalculating to obtain a stable overall representative molten steel temperature; and calculating the real-time superheat by combining the liquidus temperature of the steel grade. This application improves the accuracy of molten steel temperature and superheat monitoring.
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