Entkohlungsbehandlungsendbestimmungsverfahren, Entkohlungsbehandlungsendbestimmungsvorrichtung, Vakuumentgasungsbehandlungsbetriebsverfahren und Stahlschmelzeherstellungsverfahren

Details

Veröffentlichungs-Nr.

EP4759943

Anmeldetag

15. Oktober 2024

Veröffentlichung

1. Mai 2025

Rechtsraum

EP

IPC

C21C7/00, C21C7/10

Abstract

A decarburization treatment end determination method includes a molten steel carbon concentration estimation step (S3, S4), and a decarburization treatment end determination step (S5). The molten steel carbon concentration estimation step divides the decarburization treatment into a plurality of stages, and estimates the carbon concentration using a different molten steel carbon concentration estimation model for each stage. The molten steel carbon concentration estimation model of a final stage expresses a decarburization reaction rate as a differential equation having a term proportional to the product of a linear expression of a carbon concentration in a portion of the molten steel placed in the reduced pressure environment Cv and a decarburization reaction capacity coefficient ak. The decarburization reaction capacity coefficient ak is calculated as a linear expression of the logarithm of a pressure P in a vacuum vessel.

Anmelder

Firma

JFE Steel Corporation

Land

🇯🇵 Japan