Method for the direct reduction of iron ore
AssigneeThyssenKrupp Steel Europe AG
InventorsMatthias Weinberg, Daniel Schubert
Life of this patent
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Abstract
The invention relates to 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. 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 the mole fraction of CO2 is greater than 20 mol %.
Claims14
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 %.
Dependencies are inferred from the claim text.