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1. 发明公开

EP4324938A1 METHOD FOR PRODUCING AGGLOMERATED ORE, METHOD FOR PRODUCING REDUCED IRON, AGGLOMERATED ORE, SINTERING MACHINE AND PELLET FIRING FURNACE 审中-实审
公开(公告)号：EP4324938A1
公开(公告)日：2024-02-21
申请号：EP22824662.5
申请日：2022-04-08
申请人： JFE Steel Corporation
发明人： MORIYA, Kota , TERUI, Koki , OZAWA, Sumito
IPC分类号： C21B13/00 , C22B1/16 , C22B1/20
摘要： To provide a method for producing agglomerated ore, with which reduced iron can be efficiently produced by hydrogen reduction, without the need for preheating raw material and raising the temperature of reducing gas. A method for producing agglomerated ore, the method including sintering a sintering raw material containing an iron-containing raw material and a condensation material in a sintering machine to form a sinter cake, and obtaining agglomerated ore by crushing the sinter cake, in which iron oxide contained in the sinter cake is reduced by distributing a reducing gas through the sinter cake on the sintering machine, to make a degree of reduction of iron oxide contained in the agglomerated ore after crushing 50 % or more.

2. 发明公开

EP4317464A1 RAW MATERIAL PARTICLES FOR PRODUCTION OF AGGLOMERATE, METHOD FOR PRODUCING RAW MATERIAL PARTICLES FOR PRODUCTION OF AGGLOMERATE, AGGLOMERATE, METHOD FOR PRODUCING AGGLOMERATE, AND METHOD FOR PRODUCING REDUCED IRON 审中-实审
公开(公告)号：EP4317464A1
公开(公告)日：2024-02-07
申请号：EP21935167.3
申请日：2021-12-03
申请人： JFE Steel Corporation
发明人： HIGUCHI, Takahide , YAMAMOTO, Tetsuya , TERUI, Koki
IPC分类号： C21B13/00 , C22B1/14 , C22B5/12
摘要： Provided is a raw material particle for production of agglomerate that can be used to produce an agglomerate with better reducing performance than conventional agglomerates. The raw material particle 1(2) of the present disclosure is a raw material particle for producing an agglomerate as a raw material for producing reduced iron, including a central part 11(21), and a peripheral part 12(22) that covers the periphery of the central part 11(21). The central part 11 has a metal iron-containing substance, the central part 12 has a volatile substance, and the peripheral part 12(22) has iron oxide.

3. 发明公开

EP4350011A1 METHOD FOR PRODUCING REDUCED IRON 审中-实审
公开(公告)号：EP4350011A1
公开(公告)日：2024-04-10
申请号：EP22824894.4
申请日：2022-06-08
申请人： JFE Steel Corporation
发明人： MORIYA, Kota , TAKAHASHI, Koichi , TERUI, Koki , OZAWA, Sumito
IPC分类号： C21B13/02
摘要： Provided is a method that can achieve energy saving and CO 2 emission reduction when producing reduced iron from iron oxide. The method comprises: an iron oxide charging step of charging iron oxide into a reducing furnace; a reducing gas blowing step of blowing a reducing gas into the reducing furnace; a reduction step of reducing the iron oxide by the reducing gas in the reducing furnace; a methane synthesis step of synthesizing a gas composed mainly of methane from hydrogen gas and part of a furnace top gas discharged from a furnace top of the reducing furnace; and a gas reforming step of heating the methane and a remainder of the furnace top gas as a raw material gas and reforming the raw material gas into the reducing gas, wherein the steps are mutually connected in a circulation system, and operation is continued while supplementing carbon running short during the operation in one or more steps selected from the reducing gas blowing step, the reduction step, the methane synthesis step, and the gas reforming step or in one or more connecting parts between two or more steps selected from the reducing gas blowing step, the reduction step, the methane synthesis step, and the gas reforming step.

4. 发明公开

EP4276202A1 METHOD FOR CHARGING RAW MATERIAL INTO BLAST FURNACE 审中-实审
公开(公告)号：EP4276202A1
公开(公告)日：2023-11-15
申请号：EP22755842.6
申请日：2022-01-24
申请人： JFE Steel Corporation
发明人： TERUI, Koki , IDA, Masaru , SATO, Takeshi , OGASAWARA, Yasushi
IPC分类号： C21B5/00 , C21B7/18 , F27B1/20 , F27D3/10
摘要： To provide a method of charging raw material into a blast furnace capable of achieving a raw material particle size distribution in a furnace top bunker suitable for both forward tilt charging and reverse tilt charging, thereby increasing the gas flow rate near the center part of the blast furnace regardless of the tilting mode to further improve gas permeability and reduction efficiency. A structure that has a predetermined shape is placed in a raw material storage part of a furnace top bunker, and a raw material impact position on the structure in a storing process is determined according to a tilting mode in a charging process.

5. 发明公开

EP4357466A1 METHOD FOR PRODUCING REDUCED IRON 审中-实审
公开(公告)号：EP4357466A1
公开(公告)日：2024-04-24
申请号：EP22828113.5
申请日：2022-05-23
申请人： JFE Steel Corporation
发明人： TERUI, Koki , TAKAHASHI, Koichi , MORIYA, Kota , OZAWA, Sumito
IPC分类号： C21B13/00 , F27D17/00
CPC分类号： F27D17/00 , C21B13/00 , Y02P10/143
摘要： Provided is a method that can realize energy conservation and reduction in CO2 emissions when producing reduced iron with iron oxide. The method for producing reduced iron includes an iron oxide charging process in which iron oxide is charged into a reducing furnace, a reducing gas blowing process in which reducing gas is blown into the reducing furnace, a reduction process in which the iron oxide is reduced with the reducing gas in the reducing furnace, a methane synthesis process in which a gas containing methane as a main component is synthesized from hydrogen gas and a part of furnace gas discharged from top of the reducing furnace, and a gas reforming process in which the methane gas and furnace gas excluding those supplied to the methane synthesis process are used as a raw material gas, and the raw material gas is heated and reformed into the reducing gas, where according to changes in a ratio H2/CO of Hz and CO in reducing gas blown into the reducing furnace, an amount of furnace gas V1 supplied to the methane synthesis process and an amount of water vapor Vw in furnace gas supplied to the gas reforming process are adjusted to control a mass balance in processes from the iron oxide charging process to the reduction process.

6. 发明公开

EP4353841A1 SHAFT FURNACE OPERATION METHOD AND REDUCE IRON PRODUCTION METHOD 审中-实审
公开(公告)号：EP4353841A1
公开(公告)日：2024-04-17
申请号：EP22824661.7
申请日：2022-04-08
申请人： JFE Steel Corporation
发明人： TERUI, Koki , MORIYA, Kota , OZAWA, Sumito
IPC分类号： C21B13/02
CPC分类号： C21B13/02 , Y02P10/143
摘要： Provided is a method for operating a shaft furnace that can produce reduced iron using a shaft furnace without preheating the raw material while reducing CO2 emissions.
A method for operating a shaft furnace, including charging agglomerated ore into the shaft furnace and introducing a reducing gas consisting mainly of H2 into the shaft furnace to reduce iron oxide contained in the agglomerated ore to obtain reduced iron, in which a temperature-increased gas containing H2O, which is raised to 800°C or higher by combusting H2 and O2, is blown into the shaft furnace from a position above an introduction position of the reducing gas in a height direction of the shaft furnace.

7. 发明公开

EP4317465A1 OPERATING METHOD FOR REDUCING FURNACE 审中-实审
公开(公告)号：EP4317465A1
公开(公告)日：2024-02-07
申请号：EP21935168.1
申请日：2021-12-03
申请人： JFE Steel Corporation
发明人： YAMAMOTO, Tetsuya , HIGUCHI, Takahide , TERUI, Koki
IPC分类号： C21B13/00 , C22B5/12
摘要： Provided is an operating method for a reducing furnace with which iron oxide contained in a raw material can be reduced more efficiently than conventional methods. The operating method for a reducing furnace includes charging a raw material containing iron oxide into a reducing furnace while introducing a reducing gas that accompanies an endothermic reaction during reduction into the reducing furnace, and reducing the iron oxide to obtain reduced iron, where the raw material contains a first agglomerate with a particle size in a first particle size range and a second agglomerate with a particle size in a second particle size range whose lower limit is equal to or more than an upper limit of the first particle size range, and the raw material is preheated before being charged into the reducing furnace or heated inside the reducing furnace, and the reduced iron discharged from the reducing furnace is sieved and classified into reduced iron having a particle size range of fine particle and reduced iron having a particle size in a particle size range of coarse particle, and the reduced iron having a particle size range of fine particle is recovered.

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