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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：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.-
3.发明公开
公开(公告)号：EP4455311A1
公开(公告)日：2024-10-30
申请号：EP22928862.6
申请日：2022-10-28
IPC分类号： C21B5/00 , C07C29/151 , C21B5/06 , C21B7/00 , F27D17/00
摘要： Provided is a method of operating a blast furnace that can further reduce carbon dioxide emissions from the blast furnace under stable operation. A blown reducing agent into the blast furnace contains a regenerative organic substance and the regenerative organic substance is generated by using at least one of carbon monoxide or carbon dioxide in the blast furnace by-product gas discharged from the blast furnace with hydrogen and has a specific energy Q of 4000 kJ/kg or more.
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公开(公告)号：EP4306660A1
公开(公告)日：2024-01-17
申请号：EP22824560.1
申请日：2022-03-10
IPC分类号： C21B5/00
摘要： A high hot metal temperature is ensured even when the heat flow ratio in a lower portion of a furnace is high.
An oxygen blast furnace 1 includes a furnace body 2 into which a raw material is charged, and a tuyere 3 for injecting a blast gas and a reducing agent into the furnace body 2. The blast gas has an oxygen concentration of 50% by volume or more. A heat flow ratio β, represented by the following equation (1), in a lower portion of the furnace is 0.8 or more. The ratio (D/R) of the distance D (m) from the front end of a raceway, formed in front of the tuyere, to a furnace wall to the radius R (m) of the furnace body at the height of the tuyere satisfies the following inequation (2). β = C pig + C slag + C coke / C gas D / R > 0.13 β + 0.07 where C pig is the heat capacity (W/K) of hot metal in the lower portion of the furnace, C slag is the heat capacity (W/K) of slag in the lower portion of the furnace, C coke is the heat capacity (W/K) of coke in the lower portion of the furnace, and C gas is the heat capacity (W/K) of reducing gas in the lower portion of the furnace.-
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：EP4350011A1
公开(公告)日：2024-04-10
申请号：EP22824894.4
申请日：2022-06-08
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.
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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：EP4357466A1
公开(公告)日：2024-04-24
申请号：EP22828113.5
申请日：2022-05-23
发明人： TERUI, Koki , TAKAHASHI, Koichi , MORIYA, Kota , OZAWA, Sumito
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.
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10.发明公开
公开(公告)号：EP4265742A1
公开(公告)日：2023-10-25
申请号：EP21924888.7
申请日：2021-12-27
摘要： A molten-material-height detection method for a smelting furnace having a furnace body that includes a bosh part and having a plurality of tuyeres through which a hot blast is blown into a lower part of the furnace body, and, with the molten-material-height detection method, the height of a molten material that accumulates on a bottom part of the smelting furnace is detected by using the correspondence relationship between the rate of pressure drop increase in the bosh part relative to a tuyere front pressure and the height of a molten material.
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