Kohlenstoffarmes Eisenherstellungsverfahren mit Sauerstofffreier Injektion

Details

Veröffentlichungs-Nr.

EP4715069

Anmeldetag

15. August 2024

Veröffentlichung

24. April 2025

Rechtsraum

EP

IPC

C21B13/02, C21B13/14

Abstract

The present invention relates to the technical field of non-blast furnace low-carbon metallurgy, and relates to a zero-oxygen injection low-carbon ironmaking method. The method comprises: loading hot-state self-fluxing oxidized pellets into a gas-based shaft furnace from the top of the furnace, injecting cold reducing gas into the gas-based shaft furnace from the bottom of the gas-based shaft furnace, and meanwhile, injecting hot reducing gas into the gas-based shaft furnace from the junction of a reducing section and a cooling section of the gas-based shaft furnace, wherein the cold reducing gas is heated in the rising process and mixed with the hot reducing gas, then the mixed gas undergoes a pre-reduction reaction with the self-fluxing oxidized pellets to obtain hot-state direct reduced iron, and the hot-state direct reduced iron is cooled by the cold reducing gas in the cooling section to obtain direct reduced iron; and loading a solid carbon material and the direct reduced iron into a zero-oxygen injection furnace from the top of the furnace, injecting superhot reducing gas into the zero-oxygen injection furnace, and the direct reduced iron undergoing reduction melting to obtain liquid slag and molten iron. The present invention reduces gas heating energy consumption, and significantly reduces carbon emission compared with a blast furnace.

Anmelder

Firmen

Pangang Group Xichang Steel&Vanadium Co. Ltd
Northeastern University

Land

🇨🇳 China