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公开(公告)号：US20240218471A1
公开(公告)日：2024-07-04
申请号：US18289142
申请日：2022-03-25
Applicant: JFE STEEL CORPORATION
Inventor： Kazuhira ICHIKAWA , Tetsuya YAMAMOTO , Takeshi SATO , Yuki KAWASHIRI
IPC: C21B5/00
CPC classification number: C21B5/006
Abstract: A supplied heat quantity estimation method estimates a quantity of heat supplied to pig iron in a blast furnace from a quantity of heat supplied into the blast furnace and a production speed of molten iron in the blast furnace, and includes an estimation step of estimating a change in carried out sensible heat by in-furnace passing gas and a change in carried in sensible heat supplied by a raw material preheated by the in-furnace passing gas, and estimating the quantity of heat supplied to pig iron in the blast furnace in consideration of the estimated changes of the carried out sensible heat and the carried in sensible heat. The estimation step includes calculating an iron making speed and estimating a quantity of heat held in furnace core coke present in the blast furnace to estimate the quantity of heat supplied to pig iron.
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Patent Agency Ranking
公开(公告)号：US20240218473A1
公开(公告)日：2024-07-04
申请号：US18289170
申请日：2022-03-25
Applicant: JFE STEEL CORPORATION
Inventor： Kazuhira ICHIKAWA , Tetsuya YAMAMOTO , Takeshi SATO , Yuki KAWASHIRI
Abstract: A supplied heat quantity estimation method includes an estimation step of estimating a change in carried out sensible heat by in-furnace passing gas and a change in carried in sensible heat supplied by a raw material preheated by the in-furnace passing gas, and estimating a quantity of heat supplied to pig iron in a blast furnace in consideration of the estimated changes of the carried out sensible heat and the carried in sensible heat. The estimation step includes a step of estimating a quantity of heat supplied to pig iron in consideration of heat dissipated from the blast furnace during an air blowing break, and a step of estimating a quantity of heat held in deadman coke present in the blast furnace, and estimating the quantity of heat supplied to pig iron in consideration of the estimated quantity of heat held in deadman coke.
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公开(公告)号：US20240218472A1
公开(公告)日：2024-07-04
申请号：US18289076
申请日：2022-03-25
Applicant: JFE STEEL CORPORATION
Inventor： Kazuhira ICHIKAWA , Tetsuya YAMAMOTO , Takeshi SATO , Yuki KAWASHIRI
Abstract: A supplied heat quantity estimation method estimates a quantity of heat supplied to pig iron in a blast furnace from a quantity of heat supplied into the blast furnace and a production speed of molten iron in the blast furnace, and includes estimating a change in carried out sensible heat by in-furnace passing gas and a change in carried in sensible heat supplied by a raw material preheated by the in-furnace passing gas, and estimating the quantity of heat supplied to pig iron in the blast furnace in consideration of the estimated changes of the carried out sensible heat and the carried in sensible heat. The estimating includes estimating the changes of the carried out sensible heat and the carried in sensible heat, and estimating a quantity of heat held in deadman coke present in the blast furnace to estimate the quantity of heat supplied to pig iron.
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公开(公告)号：US20240368715A1
公开(公告)日：2024-11-07
申请号：US18289072
申请日：2022-03-25
Applicant: JFE STEEL CORPORATION
Inventor： Kazuhira ICHIKAWA , Tetsuya YAMAMOTO , Takeshi SATO , Yuki KAWASHIRI
Abstract: A supply heat quantity estimating method includes: estimating a change in carried-out sensible heat by in-furnace passing gas and a change in carried-in sensible heat supplied by a raw material preheated by the in-furnace passing gas, and estimating a quantity of heat supplied to the pig iron in a blast furnace in consideration of the estimated changes in the carried-out sensible heat and carried-in sensible heat. The estimating includes: estimating the carried-out sensible heat in consideration of the quantity of heat released to an outside, and estimating the change in the carried-in sensible heat in consideration of a change in a surface height of the raw material; and estimating a quantity of heat held in a deadman coke, and estimating the quantity of heat supplied to the pig iron in the blast furnace in consideration of the estimated quantity of heat held in the deadman coke.
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5.发明公开公开(公告)号：US20230151448A1
公开(公告)日：2023-05-18
申请号：US17919668
申请日：2021-04-07
Applicant: JFE STEEL CORPORATION
Inventor： Kazuhira ICHIKAWA , Takeshi SATO , Tetsuya YAMAMOTO , Tomohiko ITO
Abstract: A method for detecting a fluctuation of a solidified layer, and a method for operating a blast furnace by employing the relevant method. In the method for detecting a fluctuation of a solidified layer, the fluctuation of the solidified layer in the lower part of a blast furnace is detected by using the amount of heat supplied to pig iron in the lower part of the blast furnace and the amount of heat in the pig iron tapped in a predetermined period.
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6.发明公开公开(公告)号：US20240271231A1
公开(公告)日：2024-08-15
申请号：US18268744
申请日：2021-11-17
Applicant: JFE STEEL CORPORATION
Inventor： Kazuhira ICHIKAWA , Tetsuya YAMAMOTO , Takeshi SATO , Yuki KAWASHIRI
CPC classification number: C21B5/006 , F27D19/00 , F27D2019/0021
Abstract: A supply heat amount estimating method for estimating an amount of heat supplied to pig iron in a blast furnace from an amount of heat supplied into the blast furnace and a rate of production of molten pig iron in the blast furnace, the supply heat amount estimating method includes: estimating a change in carried-out sensible heat by an in-furnace passing gas and a change in carried-in sensible heat supplied by a raw material preheated by the in-furnace passing gas and estimating the amount of heat supplied to the pig iron in the blast furnace in consideration of the estimated changes in the carried-out sensible heat and the carried-in sensible heat.
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