Verfahren zur Bestimmung des Entkohlungsbehandlungsendes, Vakuumentgasungsvorrichtung, Verfahren zum Betrieb einer Vakuumentgasungsvorrichtung und Verfahren zur Herstellung von Geschmolzenem Stahl

Details

Veröffentlichungs-Nr.

EP4748948

Anmeldetag

22. August 2024

Veröffentlichung

27. Februar 2025

Rechtsraum

EP

IPC

C21C7/10, C21C7/00

Abstract

There are provided a method for determining a decarburization treatment end, vacuum degassing equipment, a method for operating vacuum degassing equipment, and a method for producing molten steel capable of estimating the carbon content in molten steel with high accuracy by properly utilizing exhaust gas measurement values to end the decarburization treatment at appropriate timing. A method for determining a decarburization treatment end for determining an end of decarburization treatment when vacuum degassing treatment including the decarburization treatment is performed by placing molten steel in a reduced-pressure environment includes: dividing the decarburization treatment into two stages of first half decarburization treatment M1 and latter half decarburization treatment M2, and estimating the carbon contents in molten steel in the first half decarburization treatment M1 and the latter half decarburization treatment M2 using different estimation models for the carbon content in molten steel for the first half decarburization treatment M1 and the latter half decarburization treatment M2, in the first half decarburization treatment M1, using the estimation model constructed based on machine learning for actual operation result data (S3), and, in the latter half decarburization treatment M2, determining the end of the decarburization treatment when an estimated value of the carbon content in molten steel has reached a target value (S7).

Anmelder

Firma

JFE Steel Corporation

Land

🇯🇵 Japan