METHOD FOR DETECTING MELT HEIGHT, DEVICE FOR DETECTING MELT HEIGHT, AND MELT PRODUCTION METHOD

JPWO2026014015A5Active Publication Date: 2026-06-16JFE STEEL CORP
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Patent Information

Authority / Receiving Office
JP · JP
Patent Type
Patents
Current Assignee / Owner
JFE STEEL CORP
Filing Date
2025-04-23
Publication Date
2026-06-16

AI Technical Summary

Technical Problem

Existing methods for detecting molten material height in a blast furnace, such as those described in Patent Documents 1 and 2, face challenges in accuracy due to poor visibility around discharge holes and insufficient correction for gas volume fluctuations, leading to inaccurate detection of molten material levels.

Method used

A method and device that measure vibrations on the furnace wall, analyze frequency correlations with gas introduction, and correct vibration intensity using the amount of Bosch gas generated, allowing for precise detection of molten material height.

Benefits of technology

The method and device provide higher accuracy in detecting molten material height by correcting vibration intensity with Bosch gas influence, preventing furnace damage and optimizing production conditions.

✦ Generated by Eureka AI based on patent content.

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Abstract

A method for detecting the height of a molten material with higher detection accuracy than conventional methods is provided. A molten material height detection method for detecting the molten material height in a blast furnace, which measures vibrations at one or more positions on the furnace wall in the lower part of the blast furnace, analyzes the vibration frequency to identify the vibration intensity of a frequency that is correlated with the vibration generated by introducing gas into an inlet in the lower part of the furnace, and detects the molten material height using a corrected vibration intensity that removes the influence of the amount of bosh gas generated by the introduction of gas from the vibration intensity of the identified frequency.
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