Blast furnace abnormality determination device, blast furnace abnormality determination method, blast furnace operation method, and molten iron production method
A technology of abnormal determination and operation method, applied in steel manufacturing process, furnace monitoring device, blast furnace, etc., can solve problems such as damage to furnace roof equipment and reduction of furnace heat, and achieve the effect of reducing air volume and avoiding abnormal occurrence.
Pending Publication Date: 2022-03-29
JFE STEEL CORP
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Problems solved by technology
[0007] For example, if gushing occurs, problems such as damage to the roof equipment or reduction in furnace heat will occur
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[0042] Hereinafter, embodiments of the present invention will be described. figure 1 It is a block diagram which shows the preferable embodiment of the abnormality determination apparatus of the blast furnace of this invention. At once figure 1 The configuration of such an abnormality determination device 10 is constructed on a computer by executing a program stored in the computer. figure 1 The abnormality determination apparatus 10 of the blast furnace detects the abnormality of the blast furnace 1 using a plurality of sensors S1 to Sn installed at different positions of the blast furnace.
[0043] The plurality of sensors S1 to Sn are, for example, axial pressure sensors, and a plurality (for example, 30) are provided at different positions in the height direction and the circumferential direction of the blast furnace 1 . The plurality of measurement data D1 to Dn measured by the plurality of sensors S1 to Sn, respectively, are stored in the database DB of the abnormality...
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Provided are an abnormality determination device and method capable of not only detecting a state abnormality, but also detecting a sign of a state abnormality in a blast furnace. An abnormality determination device (10) for detecting an abnormality in a blast furnace (1) using a plurality of sensors (S1-Sn) provided at different positions in the blast furnace (1), the abnormality determination device (10) being provided with: an evaluation value calculation unit (11) for calculating an evaluation value on the basis of a plurality of measurement data (D1-Dn) detected by the plurality of sensors (S1-Sn); and an abnormality detection unit (12) that detects an abnormality in the blast furnace (1) on the basis of the evaluation value (EV) calculated by the evaluation value calculation unit (11) using an abnormality threshold value (EVref1) and an omen threshold value (EVref2) that is smaller than the abnormality threshold value (EVref1). The abnormality detection unit (12) determines that there is an abnormality when the evaluation value (EV) is greater than an abnormality threshold value (EVref1), and determines that there is an abnormality indication when a period in which the evaluation value (EV) is greater than an indication threshold value (EVref2) continues for a set period (PT) or more.
Description
technical field [0001] The present invention relates to a blast furnace abnormality judging device for detecting abnormalities such as sticking and gushing associated with poor ventilation, a blast furnace abnormality judging method, a blast furnace operating method using the blast furnace abnormality judging device, and a molten iron manufacturing method. Background technique [0002] In a blast furnace for producing pig iron, iron ore and coke as raw materials are charged alternately from the furnace top, respectively, and the ore layer and the coke layer are stacked in layers. In addition, by adjusting the distribution of the ore layer and the coke layer in the furnace after deposition, the flow of the gas in the furnace can be controlled. [0003] When the air permeability in the blast furnace deteriorates and the smooth flow of the gas in the furnace is hindered, abnormal furnace conditions may occur. The furnace condition abnormality means a state largely deviated fro...
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Login to View More IPC IPC(8): C21B7/24C21B5/00
CPCC21B7/24C21B5/00C21B5/006F27D21/00F27D2021/0007C21B2300/04F27D21/0028
Inventor 岛本拓幸伊藤友彦山口达也
Owner JFE STEEL CORP