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公开(公告)号：US20230366050A1
公开(公告)日：2023-11-16
申请号：US18025987
申请日：2020-09-15
申请人： ArcelorMittal
发明人： Edouard IZARD , Dominique SERT , Jérôme DAULMERIE
CPC分类号： C21B7/163 , F27D3/16 , C21B5/001 , F27D2003/166
摘要： A device to inject a reducing gas into a shaft furnace including an external casing whose front face is provided with an outlet for gas injection into the shaft furnace, an internal casing located inside the external casing and made of a steel able to resist to a temperature up to 1200° C., this internal casing having an opening matching the gas injection outlet of the front face of the external casing and a refractory layer located between the external casing and the internal casing.
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公开(公告)号：US20220380860A1
公开(公告)日：2022-12-01
申请号：US17755791
申请日：2020-11-11
发明人： Koichi TAKAHASHI , Taihei NOUCHI , Sumito OZAWA , Yuki KAWASHIRI , Yuya MORITA
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：US20210190426A1
公开(公告)日：2021-06-24
申请号：US17040977
申请日：2019-03-25
发明人： Yusuke KASHIHARA , Yuki OKAMOTO , Natsuo ISHIWATA
摘要： Disclosed is a blast furnace apparatus includes: a rotating chute; a plurality of tuyeres; a profile measurement device configured to measure surface profiles of a burden charged into the blast furnace through the rotating chute; and a blowing amount controller configured to control a blowing amount of at least one of hot blast or pulverized coal in each of the plurality of tuyeres, in which the profile measurement device includes: a radio wave distance meter installed on the blast furnace top and configured to measure the distance to the surface of the burden charged; and an arithmetic unit configured to derive the surface profiles of the burden on a basis of distance data for the entire blast furnace related to distances to the surface of the burden obtained by scanning a detection wave of the radio wave distance meter in the blast furnace in a circumferential direction.
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4.发明申请公开(公告)号：US20200347468A1
公开(公告)日：2020-11-05
申请号：US16624345
申请日：2018-06-19
发明人： Lars JENNISSEN
摘要： The invention relates to the use of pellets comprising one or more thermoplastic material(s) of more than 40%, based on the total dry weight of the pellets and one or more cellulosic material(s) of more than 20%, based on the total dry weight of the pellets, as a reducing agent in a process for making pig iron in a blast furnace. Said pellets can be provided in unground form, as a partial replacement of coke through the top of the blast furnace, or can be provided as reducing agent in the raceway in an amount of higher than 10 kg/ton iron.
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公开(公告)号：US10604815B2
公开(公告)日：2020-03-31
申请号：US15802826
申请日：2017-11-03
摘要： A shaft furnace for producing metallic direct reduced iron (DRI) from iron-containing pellets or lumps and reducing gas disposed therein, including: a circumferential outer wall defining a top interior reducing zone, a middle interior transition zone, and a bottom interior cooling zone, wherein the iron-containing pellets or lumps travel downwards through the top interior reducing zone, the middle interior transition zone, and the bottom interior cooling zone as the iron-containing pellets or lumps encounter the upward-flowing reducing gas and one or more other gases; and a flow diverter disposed along a centerline of the circumferential outer wall including a convex-upwards upper tapering section disposed in the middle transition zone defined by the circumferential outer wall coupled to a convex-downwards lower tapering section disposed in the bottom cooling zone defined by the circumferential outer wall.
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公开(公告)号：US10472689B2
公开(公告)日：2019-11-12
申请号：US15504372
申请日：2015-07-03
摘要： The present invention relates to a method for pneumatically blowing a powdery substitute reducing agent in a dense flow process, by means of a transport gas, into a gasification reactor, or via a tuyere into a blast furnace. The substitute reducing agent is gasified in a gasification reaction. The transport gas comprises a fuel gas, the constituents of which or the oxidation constituents of which are at least partly involved in the gasification reaction.
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公开(公告)号：US10400292B2
公开(公告)日：2019-09-03
申请号：US15547891
申请日：2016-02-22
摘要： A method for operating a blast furnace includes blowing pulverized coal and oxygen from an upstream lance configured by a double tube. LNG is blown from a downstream lance on the downstream side in a hot air blast direction, oxygen is supplied from the upstream lance, and the pulverized coal whose temperature has been increased by the combustion of the LNG is combusted along with the supplied oxygen or oxygen in an air blast. With respect to a direction perpendicular to the hot air blast and a downstream direction of the hot air blast, a blowing direction of the LNG from the downstream lance with respect to the blast direction ranges from −30° to +45°. A blast pipe circumferential direction angle at a blowing position of the LNG from the downstream lance with respect to where the upstream lance is inserted into a blast pipe ranges from 160° to 200°.
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公开(公告)号：US10151006B2
公开(公告)日：2018-12-11
申请号：US14896805
申请日：2014-06-13
摘要： A method of detecting an abnormality in a blast furnace, wherein the abnormality causes clogging of a tuyere unit of the blast furnace, the method including capturing an image of a raceway unit through an in-furnace monitor window disposed at the tuyere unit; and determining that the abnormality has occurred when a brightness of the captured image is lower than or equal to a predetermined brightness threshold and a rate of decrease in the brightness is lower than or equal to a predetermined brightness-decrease-rate threshold.
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公开(公告)号：US10106863B2
公开(公告)日：2018-10-23
申请号：US15110073
申请日：2015-01-06
申请人： NIPPON STEEL & SUMITOMO METAL CORPORATION , JFE STEEL CORPORATION , KOBE STEEL, LTD. , NISSHIN STEEL CO., LTD. , NIPPON STEEL & SUMIKIN ENGINEERING CO., LTD.
发明人： Takanobu Inada , Hiroshi Sakai , Yutaka Ujisawa
摘要： A method for operation of a blast furnace able to greatly reduce the CO2 emission and enabling stable production of pig iron over a long period of time in a commercial blast furnace, that is, a method for operation of a blast furnace in which iron ore and coke are charged from a furnace top and is blown in pulverized coal from a usual tuyere, comprising blowing in a gas containing at least one of hydrogen and hydrocarbon from the usual tuyere together with the pulverized coal and blowing a gas comprised of a top gas of the blast furnace from which carbon dioxide and steam is removed from a shaft tuyere into the blast furnace.
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公开(公告)号：US09945001B2
公开(公告)日：2018-04-17
申请号：US14781698
申请日：2014-03-27
摘要： A method is provided for operating a blast furnace by blowing a solid reducing material, a flammable gaseous reducing material and a combustible gas into a blast furnace from tuyeres through a lance into a blast furnace, wherein a parallel type lance prepared by bundling three independent blowing tubes in parallel and integrally housing them into an outer tube is used, and either one or both of the gaseous reducing material and the combustible gas and the solid reducing material are simultaneously blown through the respective blowing tubes, while the blowing tube for the solid reducing material and the blowing tube for the gaseous reducing material are positioned above the blowing tube for the combustible gas in the blowing through the parallel type lance as well as a lance structure thereof.
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