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公开(公告)号：US12037546B2
公开(公告)日：2024-07-16
申请号：US17770354
申请日：2020-10-14
Applicant: JFE Steel Corporation
Inventor： Daisuke Igawa , Yusuke Dohi , Takashi Matsui
Abstract: A method of estimating a surface tension of coal includes subjecting a surface tension, a physical property value representing a coal rank, and a total inert content of each of different brands of coal to multiple regression analysis to determine in advance a regression equation including the surface tension of coal as an objective variable and the physical property value and the total inert content as explanatory variables; and measuring the physical property value and the total inert content of a coal of which the surface tension is to be estimated, and calculating the surface tension of the coal with the measured physical property value and the measured total inert content, and the regression equation.
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公开(公告)号：US20180031501A1
公开(公告)日：2018-02-01
申请号：US15553049
申请日：2016-02-17
Applicant: JFE STEEL CORPORATION
Inventor： Yusuke Dohi , Kiyoshi Fukada , Takashi Matsui , Mikiya Nagayama , Narumi Nanri , Kazutoshi Hanada
Abstract: A method for accurately measuring the thermoplasticity of a coal whose thermoplasticity has been difficult to evaluate and determining whether the coal that is to be measured does not significantly reduce the coke strength when used for a coal blend is disclosed. Also disclosed is a method for evaluating a coal used as a raw material for coke and includes using a physical property value relating to a thermoplasticity of a coal as an index for evaluating the coal, wherein a primary or secondary amine including an aromatic ring have been added to the coal, thereby enhancing the thermoplasticity of the coal.
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公开(公告)号：US11912940B2
公开(公告)日：2024-02-27
申请号：US17599110
申请日：2020-03-12
Applicant: JFE Steel Corporation
Inventor： Yusuke Dohi , Takashi Matsui , Mikiya Nagayama
Abstract: A method of producing a coal mixture includes blending a plurality of coals, wherein formula (1) and formula (2) are satisfied:
α
calc
=
∑
i
N
α
i
×
x
i
(
1
)
αcalc≤1.2×10−10 (mol/g-coal) (2)
wherein αcalc is a hydrogen ion release capacity per unit mass (mol/g-coal) of the coal mixture, αi is the hydrogen ion release capacity per unit mass (mol/g-coal) of a coal i, xi is a blending ratio of the coal i blended in the coal mixture, and N is a total number of brands of coal contained in the coal mixture.-
公开(公告)号：US20230051325A1
公开(公告)日：2023-02-16
申请号：US17789705
申请日：2020-12-25
Applicant: JFE Steel Corporation
Inventor： Daisuke Igawa , Takashi Matsui , Yusuke Dohi
Abstract: A method of producing a coal blend by blending plural brands of coal to produce a coal blend includes letting a surface tension of coal when inert material is assumed to be 100 vol % be γ100, and letting a surface tension of coal when reactive material is assumed to be 100 vol % be γ0, determining γ0 of coal; among brands of coal 1, 2, . . . i, . . . , and n to be blended in a coal blend, specifying coal i in which γ100 is outside of γ0; measuring TI of coal i; and determining a blending ratio of coal i such that w calculated by formula (1) is 20.4 mass % or less w=Σ(xi×TIi) (1).
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公开(公告)号：US20220162506A1
公开(公告)日：2022-05-26
申请号：US17599110
申请日：2020-03-12
Applicant: JFE Steel Corporation
Inventor： Yusuke Dohi , Takashi Matsui , Mikiya Nagayama
IPC: C10B57/04
Abstract: A method of producing a coal mixture includes blending a plurality of coals, wherein formula (1) and formula (2) are satisfied: α calc = ∑ i N α i × x i ( 1 ) αcalc≤1.2×10−10 (mol/g-coal) (2) wherein αcalc is a hydrogen ion release capacity per unit mass (mol/g-coal) of the coal mixture, al is the hydrogen ion release capacity per unit mass (mol/g-coal) of a coal i, xi is a blending ratio of the coal i blended in the coal mixture, and N is a total number of brands of coal contained in the coal mixture.
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Patent Agency Ranking
公开(公告)号：US10739285B2
公开(公告)日：2020-08-11
申请号：US15553049
申请日：2016-02-17
Applicant: JFE STEEL CORPORATION
Inventor： Yusuke Dohi , Kiyoshi Fukada , Takashi Matsui , Mikiya Nagayama , Narumi Nanri , Kazutoshi Hanada
Abstract: A method for accurately measuring the thermoplasticity of a coal whose thermoplasticity has been difficult to evaluate and determining whether the coal that is to be measured does not significantly reduce the coke strength when used for a coal blend is disclosed. Also disclosed is a method for evaluating a coal used as a raw material for coke and includes using a physical property value relating to a thermoplasticity of a coal as an index for evaluating the coal, wherein a primary or secondary amine including an aromatic ring have been added to the coal, thereby enhancing the thermoplasticity of the coal.
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公开(公告)号：US10414986B2
公开(公告)日：2019-09-17
申请号：US15312400
申请日：2015-05-15
Applicant: JFE STEEL CORPORATION
Inventor： Yusuke Dohi , Yoshiko Maeta , Kazutoshi Hanada , Kiyoshi Fukada , Takashi Matsui , Michio Honma , Masahiro Shinohara
Abstract: A method for manufacturing coke having a high strength and excellent extrusion capability. The method includes a preparing step of blending two or more coal brands to prepare a coal blend, a stirring and mixing step of stirring and mixing the coal blend to disintegrate at least a part of pseudo-particles that have been formed by agglomeration of coal particles in the coal blend, and a carbonizing step of charging the stirred and mixed coal blend into a coke oven to carbonize the stirred and mixed coal blend. Additionally, a mixing apparatus is used in the stirring and mixing step that has a capability of controlling a degree of mixing of the coal blend to be 0.85 or more at 60 seconds after start of a mixing operation. The degree of mixing is calculated by the following equation (1): degree of mixing=(σC0−σC)/(σC0−σCf) (1).
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公开(公告)号：US10240092B2
公开(公告)日：2019-03-26
申请号：US15129983
申请日：2015-03-23
Applicant: JFE STEEL CORPORATION
Inventor： Yusuke Dohi , Kiyoshi Fukada , Takashi Matsui , Mikiya Nagayama , Narumi Nanri
IPC: C10L5/00 , G01N11/02 , G01N11/04 , C10B53/04 , C10B57/04 , C10L5/04 , C10L9/08 , C21B5/00 , C10L5/02 , G01N33/22
Abstract: A coal mixture is provided that maintains a high level of coke strength after carbonization, even where coal having an excessively large permeation distance is used in a large amount. The coal mixture includes large-permeation-distance coal and permeation-distance-decreasing coal. The permeation-distance-decreasing coal has a mean maximum vitrinite reflectance Ro of 1.25% or more and a total inert amount TI of 30 vol. % or less. The blending ratio of the permeation-distance-decreasing coal in the coal mixture is in a range derived by multiplying the blending ratio of the large-permeation-distance coal by 0.25 or more and 3.0 or less.
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公开(公告)号：US12134736B2
公开(公告)日：2024-11-05
申请号：US17789705
申请日：2020-12-25
Applicant: JFE Steel Corporation
Inventor： Daisuke Igawa , Takashi Matsui , Yusuke Dohi
Abstract: A method of producing a coal blend by blending plural brands of coal to produce a coal blend includes letting a surface tension of coal when inert material is assumed to be 100 vol % be γ100, and letting a surface tension of coal when reactive material is assumed to be 100 vol % be γ0, determining γ0 of coal; among brands of coal 1, 2, . . . i, . . . , and n to be blended in a coal blend, specifying coal i in which γ100 is outside of γ0; measuring TI of coal i; and determining a blending ratio of coal i such that w calculated by formula (1) is 20.4 mass % or less w=Σ(xi×TIi) (1).
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公开(公告)号：US20220389326A1
公开(公告)日：2022-12-08
申请号：US17770354
申请日：2020-10-14
Applicant: JFE STEEL CORPORATION
Inventor： Daisuke Igawa , Yusuke Dohi , Takashi Matsui
Abstract: A method of estimating a surface tension of coal includes subjecting a surface tension, a physical property value representing a coal rank, and a total inert content of each of different brands of coal to multiple regression analysis to determine in advance a regression equation including the surface tension of coal as an objective variable and the physical property value and the total inert content as explanatory variables; and measuring the physical property value and the total inert content of a coal of which the surface tension is to be estimated, and calculating the surface tension of the coal with the measured physical property value and the measured total inert content, and the regression equation.
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