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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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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：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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