Abstract: A method for producing direct reduction iron includes reducing an iron oxide raw material by a reducing gas containing hydrogen gas to generate direct reduction iron; removing water from an exhaust gas in the reducing and thus hydrogen gas is separated from the exhaust gas; carbonizing and cooling the direct reduction iron using a cooling gas containing carbon as an element, and separating hydrogen gas and methane gas from an exhaust gas in the carbonizing and cooling, wherein the cooling gas is methane gas, wherein the reducing gas further contains the hydrogen gas separated in the removing and the hydrogen gas separated in the separating, and wherein the cooling gas further contains the methane gas separated in the separating.

Abstract: An ironmaking method includes ore beneficiating a high combined water content iron ore including a loss of ignition of 3 to 12 mass % into a goethite-rich part including at least a loss of ignition of 4 mass % or more and an iron content of 55 mass % or more; agglomerating the goethite-rich part into first fired pellets in a pellet induration furnace; and the first fired pellets into a shaft furnace while the first fired pellets have a surface temperature of 600° C. or higher, and directly reducing the first fired pellets using a reducing gas containing 60 volume % or more of hydrogen.

Abstract: An agglomerated ore that is a molded product obtained by mixing a plurality of types of particles, wherein the plurality of types of particles includes at least iron carbide particles and iron oxide particles, wherein at least some of the iron oxide particles are exposed on a surface layer of the agglomerated ore, wherein the porosity of the agglomerated ore is 20% or more and 40% or less, wherein the ratio of the total mass of metallic iron and iron in iron carbide to the mass of total iron contained in the agglomerated ore is 40 mass % or more and 80 mass % or less, and wherein the concentration of carbon including carbon in the iron carbide particles is 1.0 mass % or more and 4.5 mass % or less.

Abstract: A method for producing reduced iron that produces reduced iron by reducing iron oxide charged in a shaft furnace, in which a heated gas mixture which contains a reducing gas and a nitrogen gas, the reducing gas containing 90 volume % or more of a hydrogen gas, is blown into the shaft furnace from a tuyere equipped at a lower portion of a reduction zone of the shaft furnace, at least part of the reducing gas is blown into a cooling zone of the reduced iron provided at a lower portion of the shaft furnace at normal temperature, and the reducing gas that has flowed up in the cooling zone is used for reduction of the iron oxide.

Abstract: A method for producing reduced iron that produces reduced iron by reducing iron oxide charged in a shaft furnace, in which a gas mixture which contains a reducing gas and a nitrogen gas, and has a predetermined temperature, is blown into the shaft furnace. The reducing gas contains 90 volume% or more of a hydrogen gas.

Abstract: A raw material for direct reduction which is reduced in a shaft furnace includes a raw material, and a coating layer which coats the raw material and has a porosity of 20 volume % or more.

Abstract: A raw material for direct reduction which is reduced in a shaft furnace includes a raw material, and a coating layer which coats the raw material and has a porosity of 20 volume % or more.

Abstract: A raw material for direct reduction which is reduced in a shaft furnace includes a raw material, and a coating layer which coats the raw material and has a porosity of 20 volume % or more.