Düsenvorrichtung für einen Hochofen und Betriebsverfahren für einen Hochofen

Details

Veröffentlichungs-Nr.

EP4814134

Anmeldetag

13. Dezember 2024

Veröffentlichung

11. September 2025

Rechtsraum

EP

IPC

C21B7/16, C21B5/00

Abstract

The tuyere apparatus of the present disclosure includes an outer flow hole disposed on an outermost peripheral side inside a tuyere, and an inner flow hole disposed on an inner peripheral side of the outer flow hole. The inner flow hole has two or more independent flow paths that are spaced apart from an inner surface of the tuyere. A method of operating a blast furnace of the present disclosure uses the blast furnace tuyere apparatus and includes injecting a low-oxygen-concentration gas, a high-oxygen-concentration gas with a higher oxygen concentration than that of the low-oxygen-concentration gas, and a reducing agent into the blast furnace from the tuyere, injecting the low-oxygen-concentration gas through the outer flow hole, injecting the high-oxygen-concentration gas and the reducing agent through the inner flow hole, and injecting the high-oxygen-concentration gas and the reducing agent separately through the two or more independent flow paths.

Anmelder

Firma

JFE Steel Corporation

Land

🇯🇵 Japan

Fachgebiete