公开(公告)号：US12163198B2

公开(公告)日：2024-12-10

申请号：US18069601

申请日：2022-12-21

Applicant: UNIVERSITY OF UTAH RESEARCH FOUNDATION

Inventor： Hong Yong R. Sohn ,  Syamantak Roy

IPC: C21B13/00

Abstract: An alternative approach to producing iron from iron concentrates produced from low grade iron ore without going through pelletization and induration. Such a method may include providing iron ore concentrate in a small particle form, passing the iron ore concentrate through a moving bed conveyor reduction furnace with at least one of hydrogen or natural gas, wherein the concentrate is present in a layer that is no more than about 5 cm thick, the hydrogen gas or natural gas reducing the concentrate so as to remove oxygen therefrom, converting the iron ore concentrate to iron that has a composition similar to direct reduced iron (DRI) or sponge iron product, having about 90-95% iron, up to about 10% oxygen, with other trace impurities. Energy consumption is reduced by 30-50% and CO2 emissions are reduced by 60-95%, depending on whether natural gas or hydrogen is used.

公开(公告)号：US20240026475A1

公开(公告)日：2024-01-25

申请号：US18069601

申请日：2022-12-21

Applicant: UNIVERSITY OF UTAH RESEARCH FOUNDATION

Inventor： Hong Yong R. Sohn ,  Syamantak Roy

IPC: C21B13/00

CPC classification number: C21B13/004 ,  C21B13/0073 ,  C21B13/0033

Abstract: An alternative approach to producing iron from iron concentrates produced from low grade iron ore without going through pelletization and induration. Such a method may include providing iron ore concentrate in a small particle form, passing the iron ore concentrate through a moving bed conveyor reduction furnace with at least one of hydrogen or natural gas, wherein the concentrate is present in a layer that is no more than about 5 cm thick, the hydrogen gas or natural gas reducing the concentrate so as to remove oxygen therefrom, converting the iron ore concentrate to iron that has a composition similar to direct reduced iron (DRI) or sponge iron product, having about 90-95% iron, up to about 10% oxygen, with other trace impurities. Energy consumption is reduced by 30-50% and CO2 emissions are reduced by 60-95%, depending on whether natural gas or hydrogen is used.