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.

公开(公告)号：US20250034669A1

公开(公告)日：2025-01-30

申请号：US18716603

申请日：2021-12-16

Applicant: ArcelorMittal

Inventor： Ignacio BAQUET GONZALEZ ,  Ignacio HERRERO BLANCO ,  Jean-Luc Didier REBOUL

IPC: C21C5/52 ,  C21B5/06 ,  C21B13/00

Abstract: A steel manufacturing method includes the steps of producing direct reduced iron in a direct reduction plant (1) using a syngas (70) resulting from the gasification of solid waste fuels, producing hot metal (22) and a blast furnace top gas (21) in a blast furnace (2) using a hot blast (20), the blast furnace top gas (21) being at least partly (21A) used into the direct reduction plant (1) and producing molten metal and electric furnace gas in an electric furnace (3) using the produced direct reduced iron (12). Associated network of plants.

公开(公告)号：US20250034668A1

公开(公告)日：2025-01-30

申请号：US18716423

申请日：2022-12-07

Applicant: ArcelorMittal

Inventor： Manfred VAN VLIERBERGHE ,  Jean-Luc Didier REBOUL ,  Dominique SERT ,  Wim VAN DER STRICHT

IPC: C21C5/52 ,  C21B5/06 ,  C21B13/00 ,  C21C5/40

Abstract: A Steel manufacturing method including the step of producing direct reduced iron (12) and a reduction top gas (13) in a direct reduction plant (1) using a reducing gas (11), the reduction top (13) being at least partly (13A) recycled as reducing gas (11), producing hot metal and a blast furnace top gas (21) in a blast furnace (2), wherein from 200 Nm3 to 700 Nm3 of hydrogen (20) per ton of hot metal to be produced are injected and the blast furnace top gas (21A) being at least partly sent to a biochemical plant (4) to produce hydrocarbons and producing molten metal and electric furnace gas in an electric furnace (3) using at least a part of the produced direct reduced iron (12).