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).