US 12,286,679 B2
Method for the direct reduction of iron ore
Matthias Weinberg, Krefeld (DE); and Daniel Schubert, Duisburg (DE)
Assigned to ThyssenKrupp Steel Europe AG, Duisburg (DE)
Appl. No. 17/775,419
Filed by ThyssenKrupp Steel Europe AG, Duisburg (DE)
PCT Filed Nov. 5, 2020, PCT No. PCT/EP2020/081153
§ 371(c)(1), (2) Date May 9, 2022,
PCT Pub. No. WO2021/094195, PCT Pub. Date May 20, 2021.
Claims priority of application No. 102019217631.3 (DE), filed on Nov. 15, 2019.
Prior Publication US 2022/0389528 A1, Dec. 8, 2022
Int. Cl. C21B 13/00 (2006.01); C21B 13/02 (2006.01)
CPC C21B 13/0033 (2013.01) [C21B 13/0073 (2013.01); C21B 13/029 (2017.05)] 14 Claims
OG exemplary drawing
 
1. A process for direct reduction of iron ore to afford direct reduced iron, wherein the iron ore sequentially passes through a reduction zone for reducing the iron ore to direct reduced iron and a cooling zone for cooling the direct reduced iron, wherein in the reduction zone the iron ore is subjected to a flow of a reduction gas and wherein in the cooling zone the direct reduced iron is subjected to a flow of a cooling gas, wherein the cooling gas in the cooling zone comprises H2 and CO2, wherein the ratio of the mole fractions of H2 to CO2 is greater than 1.8 and less than 2.2 and the mole fraction of CO2 is greater than 20 mol %.