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公开(公告)号：EP4353840A1
公开(公告)日：2024-04-17
申请号：EP22824549.4
申请日：2022-03-09
发明人： MORITA, Yuya , HIGUCHI, Takahide , YAMAMOTO, Tetsuya , HIROSAWA, Toshiyuki , IWAMI, Yuji , HORITA, Kenya , FUJIWARA, Shohei , TAKEHARA, Kenta , IGAWA, Daisuke
摘要： An agglomerated ore assessing method is provided that can assess clustering of reduced iron when it has been reduced at a high hydrogen concentration, with thermal compensation using blowing sensible heat taken into account. In this method, agglomerated ore is reduced while being subjected to a predetermined load at 1000°C to 1200°C, both inclusive, to produce a reduced aggregate; a tumble treatment is performed on the reduced aggregate using a tumble tester; cluster strength CS of the reduced aggregate calculated by Formula (1) below is measured; and a clustering property of the agglomerated ore is assessed using the cluster strength CS: CS = (W'/W) × 100 ··· (1), where CS is cluster strength (mass%); W is the mass (g) of a reduced aggregate that is equal to or larger than a maximum particle diameter of the agglomerated ore; and W' is the mass (g) of a reduced aggregate after a tumble treatment in the tumble tester that is equal to or larger than the maximum particle diameter of the agglomerated ore.
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公开(公告)号：EP4067509A1
公开(公告)日：2022-10-05
申请号：EP20893163.4
申请日：2020-11-11
摘要： Provided is a method of operating a blast furnace, having generating a hydrogen gas by electrolysis of water, generating a regenerative methane gas from a by-product gas discharged from the blast furnace and the hydrogen gas, and blowing a blast gas and a reducing agent into the blast furnace from a tuyere, wherein the blast gas is oxygen gas and the regenerative methane gas is used as at least a part of the reducing agent.
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公开(公告)号：EP4141130A1
公开(公告)日：2023-03-01
申请号：EP21792587.4
申请日：2021-01-07
摘要： Provided is a method of operating a blast furnace, including separating carbon dioxide gas from a by-product gas discharged from the blast furnace, generating a regenerative methane gas from the carbon dioxide gas, and blowing a blast gas and a reducing agent into the blast furnace from a tuyere, in which the blast gas is oxygen gas and the regenerative methane gas is used as at least part of the reducing agent.
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公开(公告)号：EP4067508A1
公开(公告)日：2022-10-05
申请号：EP20891789.8
申请日：2020-11-11
摘要： Provided is a method of operating a blast furnace, having generating a regenerative methane gas from a by-product gas discharged from the blast furnace, and blowing a blast gas and a reducing agent into the blast furnace from a tuyere of the blast furnace in which the blast gas is oxygen gas and the regenerative methane gas is used as at least part of the reducing agent.
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公开(公告)号：EP4400606A1
公开(公告)日：2024-07-17
申请号：EP22886398.1
申请日：2022-07-12
摘要： A method of operating a methane gas generation device and a method of operating a blast furnace that make it possible to control the deterioration rate of a catalyst by appropriately adjusting the operating conditions of the blast furnace and the methane gas generation device. A method of operating a methane gas generation device includes: a process of generating methane gas, using a methane gas synthesis reactor, from raw material gas including blast furnace gas discharged from a blast furnace; a process of obtaining methane concentration in the methane gas; and a process of adjusting methane gas generation conditions based on a comparison between the methane concentration and a predetermined methane concentration target value.
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公开(公告)号：EP4339311A1
公开(公告)日：2024-03-20
申请号：EP22819846.1
申请日：2022-03-04
发明人： TAKEHARA, Kenta , YAMAMOTO, Tetsuya , HIGUCHI, Takahide , HORITA, Kenya , IWAMI, Yuji , FUJIWARA, Shohei , MORITA, Yuya , HIROSAWA, Toshiyuki , IGAWA, Daisuke
摘要： Provided is an ore crushing method capable of efficiently crushing iron ores that are difficult to finely crush. The ore crushing method includes coarsely crushing the iron ores to reduce the proportion of particles with a particle size of greater than or equal to 1 mm, and then finely crushing the iron ores to increase the proportion of particles with a particle size of less than 63 µm. The average pore size of the iron ores is preferably less than or equal to 10 µm, the proportion of the particles with a particle size of greater than or equal to 1 mm in the iron ores is preferably greater than or equal to 30 mass%, the iron ores are preferably coarsely crushed so that the proportion of the particles with a particle size of greater than or equal to 1 mm becomes less than or equal to 20 mass%, the iron ores are preferably finely crushed so that the proportion of the particles with a particle size of less than 63 µm becomes greater than or equal to 70 mass%, and the iron ores are preferably finely crushed with a wet ball mill. A pellet production method is also provided that includes granulating a raw material, which includes the iron ores crushed with the ore crushing method, into pellets.
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公开(公告)号：EP4339301A1
公开(公告)日：2024-03-20
申请号：EP22827948.5
申请日：2022-03-08
发明人： MORITA, Yuya , YANAGISAWA, Ryuta , TAKAHASHI, Koichi , OZAWA, Sumito , NOUCHI, Taihei , KAWASHIRI, Yuki , KASHIHARA, Yusuke
摘要： Provided are a method for blowing a gaseous reducing agent and a blast furnace tuyere with which it is possible to prevent, in the blast furnace tuyere, a combustion reaction from occurring in the vicinity of a connection part between the tuyere and a blowpipe and a combustion flame that is formed in a raceway space in front of the tuyere from returning to the inside of the tuyere.
The method includes blowing the gaseous reducing agent into a blast furnace by using a blast furnace tuyere 10, in which the blast furnace tuyere 10 has a main flow-through hole 12 and a sub flow-through hole 14 that is disposed on an outer side in a radial direction of the main flow-through hole 12, in which a flow speed of an oxygen-containing gas that flows through the main flow-through hole 12 is increased in a tuyere tip part 13 of the main flow-through hole 12, in which the gaseous reducing agent that flows through the sub flow-through hole 14 is converged with the oxygen-containing gas in the tuyere tip part 13 of the main flow-through hole 12 to form a mixed gas, and in which the mixed gas is blown into the blast furnace.-
公开(公告)号：EP4144868A1
公开(公告)日：2023-03-08
申请号：EP21797227.2
申请日：2021-01-06
发明人： TAKAHASHI, Koichi , OZAWA, Sumito , KAWASHIRI, Yuki , MORITA, Yuya , NOUCHI, Taihei , SATO, Michitaka
摘要： Provided is a steelmaking line contributing to the realization of a method that achieves energy saving and CO 2 emission reduction when producing reduced iron from iron oxide. The steelmaking line comprises: a blast furnace configured to reduce iron oxide; a reducing furnace configured to reduce iron oxide; a methane synthesizer configured to synthesize methane from blast furnace gas and/or furnace top gas, and hydrogen gas; a blower configured to blow the methane gas synthesized by the methane synthesizer into the blast furnace; a heat-reformer configured to heat or heat-reform the blast furnace gas and/or the furnace top gas, and the methane gas synthesized by the methane synthesizer, to generate reducing gas; a reducing gas blower configured to blow the reducing gas into the reducing furnace; and a supply path configured to supply the furnace top gas to the methane synthesizer and/or the heat-reformer.
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公开(公告)号：EP4095268A1
公开(公告)日：2022-11-30
申请号：EP20914910.3
申请日：2020-12-14
IPC分类号： C21B5/00
摘要： Provided is a method of operating a blast furnace, including combusting, with the use of a combustion-supporting gas, at least part of a blast furnace by-product gas in a combustion facility, generating a regenerative methane gas using a combustion exhaust gas discharged from the combustion facility, and blowing a blast gas and a reducing agent into the blast furnace from a tuyere, in which the blast gas is oxygen gas, the regenerative methane gas is used as at least part of the reducing agent, and oxygen gas is used as the combustion-supporting gas for the combustion facility.
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公开(公告)号：EP4089185A1
公开(公告)日：2022-11-16
申请号：EP20912255.5
申请日：2020-12-14
IPC分类号： C21B5/00
摘要： Provided is a method of operating a blast furnace, including generating a regenerative methane gas using a by-product gas discharged from the blast furnace and a coke oven gas, and blowing a blast gas and a reducing agent into the blast furnace from a tuyere, in which the blast gas is oxygen gas and the regenerative methane gas is used as at least part of the reducing agent.
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