公开(公告)号：US20250019782A1

公开(公告)日：2025-01-16

申请号：US18716445

申请日：2021-12-16

Applicant: ArcelorMittal

Inventor： Dominique SERT ,  Patrick NEGRO ,  Eric Alain Gabriel HESS ,  Jean-Luc Didier REBOUL

IPC: C21B5/06 ,  C21B7/00 ,  C25B1/04

Abstract: Method to produce hot metal in at least one blast furnace (1) including at least two levels of gas injection (3A, 3B) and emitting a blast furnace top gas (10) when working, the method including at least the steps of charging an iron-containing charge (4) and a first carbon-based reductant (5) into the blast furnace, injecting at the first level (3A) a hot blast (11) having a temperature upper or equal to 1000° C., the hot blast including oxygen (6), recovering the blast furnace top gas to extract hydrogen to produce an H2-rich stream (13) including more than 90% v of hydrogen and an H2-lean stream (12 an injecting the H2-rich stream (11) into the blast furnace at the second level of gas injection (3B). Associated network of plants.