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公开(公告)号：US20210216680A1
公开(公告)日：2021-07-15
申请号：US17054968
申请日：2019-04-03
发明人： Hiroto KASE , Shinji TOMIYAMA , Yukio TAKAHASHI , Shota AMANO , Toshifumi KODAMA
IPC分类号： G06F30/20 , C21C5/30 , G01N33/205
摘要： A molten metal component estimation device including: an input device configured to receive measurement information about a refining facility including measurement results regarding an optical characteristic; a model database that stores model expressions and model parameters, regarding a blowing process reaction, including a model expression and model parameters representing a relation between the oxygen efficiency in decarburization and a carbon concentration in a molten metal in the refining facility; and a processor configured to: estimate component concentrations of the molten metal including the carbon concentration in the molten metal by using the measurement information, the model expressions and the model parameters; estimate the carbon concentration in the molten metal based on the measurement results; and determine the model expression and the model parameters to be used when estimating the component concentrations of the molten metal, based on the estimation result of the carbon concentration in the molten metal.
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公开(公告)号：US20240167112A1
公开(公告)日：2024-05-23
申请号：US18282266
申请日：2021-11-04
发明人： Shota AMANO , Yuki KONO
CPC分类号： C21C1/02 , C21C1/04 , C21C5/32 , C21C5/36 , C21C5/4673 , C21C5/52 , C21C7/072 , C21C2005/5288 , C21C2300/06 , C21C2300/08
摘要： When supplying oxygen source to molten pig iron inside a converter-type refining furnace and performing desiliconization, dephosphorization, and decarburization refining, one or more of slag removal flow shape, slag removal flow velocity, and slag surface shape while discharging slag through a throat is measured to estimate one or both of a slag removal amount and physical properties of removed slag. When sequentially performing one or both of desiliconization and dephosphorization, an intermediate step of discharging part or all of generated slag through the throat, and the remaining other refining step, in the intermediate step, the method measures one or two of slag removal flow shape, slag removal flow velocity, and slag surface shape, estimates one or both of amount and physical properties of slag removed, estimates remaining slag amount, or remaining slag amount and composition, and determines an auxiliary raw material amount to be fed in the other refining step.
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公开(公告)号：US20240076754A1
公开(公告)日：2024-03-07
申请号：US18270617
申请日：2021-12-21
发明人： Futoshi OGASAWARA , Hidemitsu NEGISHI , Kenji NAKASE , Shota AMANO , Yumi MURAKAMI , Rei YOKOMORI , Yudai HATTORI , Ryo KAWABATA , Naoki KIKUCHI
摘要： A molten iron refining method having, an auxiliary material, and an oxidizing gas supplied through a top-blowing lance, to a cold iron source and molten pig iron that are contained/fed in a converter-type vessel, and molten iron is subjected to a refining process. A pre-charged cold iron source is charged into the converter-type vessel at an amount not larger than 0.15 times. A furnace-top-added cold iron source that's part or all of the cold iron source and added from a furnace top is fed during the refining process. A burner at a leading end of the top-blowing lance that spray holes through which a fuel and a combustion-supporting gas are ejected. During the refining process, a powdery auxiliary material processed into powder that's part of the auxiliary material is blown in, to pass through a flame formed by the burner.
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公开(公告)号：US20220154299A1
公开(公告)日：2022-05-19
申请号：US17601481
申请日：2020-04-02
发明人： Yumi MURAKAMI , Nobuhiko ODA , Yusuke FUJII , Goro OKUYAMA , Shota AMANO , Shinji KOSEKI , Shingo SATO , Yukio TAKAHASHI , Ryo KAWABATA , Naoki KIKUCHI , Atsuo YUASA
IPC分类号： C21C5/46
摘要： A top-blowing lance nozzle is configured to freely switch an adequate expansion condition so as to control an oxygen-blowing amount and a jetting velocity independently of each other without requiring a plurality of lance nozzles or a mechanically movable part. A lance nozzle is configured to blow refining oxygen to molten iron charged in a reaction vessel while a gas is blown from a top-blowing lance to the molten iron. One or more blowing holes for blowing a working gas are on an inner wall side surface of the nozzle, at a site where the lance nozzle has a minimum cross-sectional area in a nozzle axis direction or at a neighboring site of the site.
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5.发明公开公开(公告)号：US20240076755A1
公开(公告)日：2024-03-07
申请号：US18272474
申请日：2021-12-02
CPC分类号： C21C7/0037 , C21C5/35 , C21C5/4606 , C21C7/068
摘要： A method that, regarding a process of refining molten iron, can increase the thermal margin and the amount of cold iron source to be used. A burner having jetting holes for jetting a fuel and a combustion supporting gas is provided at a leading end part of one lance that top-blows an oxidizing gas to molten iron contained in a converter-type vessel, or at a leading end part of another separate lance. A powdery auxiliary raw material or an auxiliary raw material processed into a powder form that is blown into the molten iron from the one lance or the other lance passes through a flame formed by the burner. This top-blowing lance for a converter is configured to secure a predetermined heating time and powder-fuel ratio. Also, a method for adding an auxiliary raw material and a method for refining of molten iron that use this top-blowing lance.
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公开(公告)号：US20240068060A1
公开(公告)日：2024-02-29
申请号：US18271612
申请日：2021-12-09
摘要： Proposed is a molten iron refining method capable of securing an in-flame staying time period of a heat transfer medium without being influenced by height adjustments of a blowing-purpose oxygen-blowing lance. As far as to a position lower than an upper end inside a converter-type vessel 1, a blowing-purpose oxygen-blowing lance 3 that supplies oxidizing gas and is capable of ascending and descending and at least one burner lance 4 capable of ascending and descending independently of the blowing-purpose oxygen-blowing lance are inserted. From the blowing-purpose oxygen-blowing lance, either oxidizing gas or oxidizing gas and CaO-containing refining agent are blown onto the molten iron. Also, a flame is formed by causing the burner lance to discharge fuel gas and combustion supporting gas. Powder particles discharged from the burner lance are caused to pass through the flame and to be blown onto the molten iron in a heat-transferred state, so that the molten iron is thermally compensated.
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公开(公告)号：US20230332260A1
公开(公告)日：2023-10-19
申请号：US18024156
申请日：2021-08-25
发明人： Hiroto KASE , Shota AMANO , Yukio TAKAHASHI , Shinji TOMIYAMA
IPC分类号： C21C7/076
CPC分类号： C21C7/076 , C21C2300/08 , C21C2300/06
摘要： A refining process control device includes: a past similar performance extraction unit configured to extract, from the refining performance database, a performance value of a past refining process in which a refining condition being a refining process condition acquired before the start of the refining process and including a result of an immediately preceding refining process in the refining facility, is similar to a refining process condition as a calculation target and the evaluation value is high; and an operation amount determination unit configured to determine an initial operation amount at the start of a refining process based on the performance value of the past refining process extracted by the past similar performance extraction unit, and determine an operation amount based on a change amount of the initial operation amount after the start of the refining process.
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公开(公告)号：US20220177987A1
公开(公告)日：2022-06-09
申请号：US17600827
申请日：2020-03-24
发明人： Shota AMANO , Yukio TAKAHASHI , Hiroto KASE , Naoki KIKUCHI
摘要： A method and system for predicting slopping in a converter occurring during decarburization refining in the converter in which molten steel is produced from a molten pig iron by blowing oxidizing gas to the molten pig iron in the converter from a top blowing lance, or optionally further blowing oxidizing gas or inert gas from a bottom blowing tuyere to perform the decarburization refining of the molten pig iron. The method includes measuring an emission spectrum of a throat combustion flame blowing out from a throat of the converter, calculating emission intensity of the measured emission spectrum at a wavelength in a range of 580 to 620 nm, and predicting the occurrence of the slopping based on a time-series change of the calculated emission intensity.
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公开(公告)号：US20200157645A1
公开(公告)日：2020-05-21
申请号：US16611674
申请日：2018-05-07
发明人： Shota AMANO , Yukio TAKAHASHI , Naoki KIKUCHI , Yuji MIKI
摘要： When the decarburization refining of molten iron is performed by top-blowing oxygen gas from the top blowing lance, the oscillation of molten iron, a bubble burst, and spitting due to the bubble burst are suppressed. A refining method for a converter includes decarburizing molten iron in the converter with a top blowing lance having Laval nozzles disposed at the lower end thereof by blowing oxygen gas on the surface of the molten iron in the converter through the Laval nozzles, in which one or both of an oxygen feeding rate from the top blowing lance and lance height LH are adjusted in such a manner that an oxygen accumulation index S(F) is 40 or less.
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