公开(公告)号：US20240393159A1

公开(公告)日：2024-11-28

申请号：US18691887

申请日：2022-08-10

Applicant: JFE STEEL CORPORATION

Inventor： Hiroto KASE ,  Sota ITO ,  Keisuke SANO ,  Rei YOKOMORI ,  Futoshi OGASAWARA ,  Ryo KAWABATA ,  Tomohiko ITO

IPC: G01G17/04 ,  C21C5/32 ,  C21C5/46 ,  G01F23/284 ,  G01N9/32

Abstract: A furnace slag amount estimation device (1) includes: an input unit (11) configured to receive input data including furnace shape data for a converter, data on components and temperatures of molten metal and slag before start of or during blowing treatment, and slag height data in a furnace of the converter; a slag bulk density calculation unit (13) configured to calculate a slag bulk density after the converter is tilted, using the input data and a model; a slag volume calculation unit (14) configured to calculate a slag volume in the furnace after the converter is tilted, using the slag height data after the converter is tilted, the furnace shape data, and a model; and a slag weight calculation unit (15) configured to calculate a slag weight in the furnace after the converter is tilted and slag is discharged, using the calculated slag bulk density and the calculated slag volume.

公开(公告)号：US20210216680A1

公开(公告)日：2021-07-15

申请号：US17054968

申请日：2019-04-03

Applicant: JFE STEEL CORPORATION

Inventor： Hiroto KASE ,  Shinji TOMIYAMA ,  Yukio TAKAHASHI ,  Shota AMANO ,  Toshifumi KODAMA

IPC: G06F30/20 ,  C21C5/30 ,  G01N33/205

Abstract: 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.

公开(公告)号：US20250075280A1

公开(公告)日：2025-03-06

申请号：US18293956

申请日：2022-06-14

Applicant: JFE STEEL CORPORATION

Inventor： Rei YOKOMORI ,  Ryo KAWABATA ,  Naoki KIKUCHI ,  Tomohiro SUGINO ,  Hiroto KASE

IPC: C21B13/00

Abstract: A cold iron source melting ratio estimation device that estimates a melting ratio of a cold iron source charged into a converter-type refining furnace during refining of molten iron in the converter-type refining furnace. The device includes: an input section to which measured values of in-furnace information or estimated values of the in-furnace information is input, the in-furnace information including a molten iron temperature and a carbon concentration in the molten iron during refining; a database section that stores a model equation and parameters related to a refining reaction of the molten iron in the converter-type refining furnace; a computation section that computes the melting ratio of the cold iron source using the measured values or the estimated values input to the input section; and an output section that displays the melting ratio of the cold iron source computed by the computation section.

公开(公告)号：US20230332260A1

公开(公告)日：2023-10-19

申请号：US18024156

申请日：2021-08-25

Applicant: JFE STEEL CORPORATION

Inventor： Hiroto KASE ,  Shota AMANO ,  Yukio TAKAHASHI ,  Shinji TOMIYAMA

IPC: C21C7/076

CPC classification number: C21C7/076 ,  C21C2300/08 ,  C21C2300/06

Abstract: 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.

公开(公告)号：US20220177987A1

公开(公告)日：2022-06-09

申请号：US17600827

申请日：2020-03-24

Applicant: JFE STEEL CORPORATION

Inventor： Shota AMANO ,  Yukio TAKAHASHI ,  Hiroto KASE ,  Naoki KIKUCHI

IPC: C21C5/46 ,  C21C5/30 ,  G01N21/71

Abstract: 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.