[go: up one dir, main page]

WO2024161701A1 - Procédé de mesure de niveau de matière fondue à l'intérieur d'un haut-fourneau, dispositif de mesure de niveau de matière fondue à l'intérieur d'un haut-fourneau, et procédé de fonctionnement de haut-fourneau - Google Patents

Procédé de mesure de niveau de matière fondue à l'intérieur d'un haut-fourneau, dispositif de mesure de niveau de matière fondue à l'intérieur d'un haut-fourneau, et procédé de fonctionnement de haut-fourneau Download PDF

Info

Publication number
WO2024161701A1
WO2024161701A1 PCT/JP2023/035199 JP2023035199W WO2024161701A1 WO 2024161701 A1 WO2024161701 A1 WO 2024161701A1 JP 2023035199 W JP2023035199 W JP 2023035199W WO 2024161701 A1 WO2024161701 A1 WO 2024161701A1
Authority
WO
WIPO (PCT)
Prior art keywords
blast furnace
molten material
material level
vibration
measuring
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Ceased
Application number
PCT/JP2023/035199
Other languages
English (en)
Japanese (ja)
Inventor
大熙 岩永
亮太郎 松永
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
JFE Steel Corp
Original Assignee
JFE Steel Corp
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by JFE Steel Corp filed Critical JFE Steel Corp
Priority to CN202380091984.6A priority Critical patent/CN120569495A/zh
Priority to EP23919837.7A priority patent/EP4636099A1/fr
Priority to KR1020257025390A priority patent/KR20250129751A/ko
Priority to JP2024510526A priority patent/JP7513226B1/ja
Publication of WO2024161701A1 publication Critical patent/WO2024161701A1/fr
Anticipated expiration legal-status Critical
Ceased legal-status Critical Current

Links

Images

Classifications

    • C—CHEMISTRY; METALLURGY
    • C21—METALLURGY OF IRON
    • C21B—MANUFACTURE OF IRON OR STEEL
    • C21B7/00—Blast furnaces
    • C21B7/24—Test rods or other checking devices

Definitions

  • the present invention relates to a method for measuring the molten material level in a blast furnace, a device for measuring the molten material level in a blast furnace, and a method for operating a blast furnace.
  • molten material level the rise in the liquid level of the molten iron and molten slag (hereinafter, abbreviated as molten material level) that remain in the packed bed at the bottom of the furnace.
  • the rise in the liquid level of the molten material causes the narrowing of the gas flow path inside the furnace, which can be a direct cause of an increase in blast pressure.
  • the molten material level reaches the blast tuyere level, it can cause serious problems such as melting of the blast tuyere, and even blockage of the blast tuyere and slag backflow (a phenomenon in which molten material flows back from the blast tuyere). For this reason, in order to achieve stable operation of the blast furnace, it is necessary to ensure that the molten material level does not reach the blast tuyere level.
  • Patent Document 1 describes a method for estimating the amount of molten material remaining in the furnace by calculating the theoretical amount of molten material discharged from the blast furnace using the actual volume value of the materials charged in the furnace and a theoretical volume value calculated from the operational parameters, and comparing this with the amount of molten material actually discharged.
  • Patent Document 2 describes a method for estimating the molten material level in a furnace by solving variables measured by multiple strain gauges installed in the furnace body by applying parameters representing the properties of the constituent materials of the blast furnace, including the molten material level, to a general equation for continuous peripheral strain.
  • Patent Document 3 describes a method that utilizes the so-called Bernoulli's theorem to calculate the discharge speed of the molten material discharged from the tap hole of a blast furnace from the discharge distance, discharge angle, and discharge height, and to use this to estimate the molten material level inside the furnace.
  • the accuracy of the estimation in this method depends on the accuracy of the calculation of the discharge speed of the molten material discharged from the tap hole, and this method estimates the discharge speed by image analysis of images taken with a camera.
  • Patent Document 4 describes a method that measures the vibration intensity of the furnace wall at the bottom of the furnace, and estimates the molten material level inside the furnace from the correspondence between the vibration intensity in a specific frequency band determined in advance and the molten material level.
  • Patent Document 1 does not take into account the void ratio of the packed bed in the lower part of the furnace or the shape of the solidified layer. Therefore, even if it is possible to estimate the amount of molten material remaining in the furnace, there remains a problem with estimating the liquid level of the molten material, which is important for stable operation of the blast furnace. In addition, since it is affected by various weighing errors, there is a concern that estimation errors will accumulate in blast furnace processes that handle large masses, and the estimation accuracy will decrease over time.
  • Patent Document 2 also has the following problems. It is known that in the lower part of the furnace, in addition to the iron shell and cooling staves on the surface of the blast furnace, there are refractory bricks and a solidified layer formed by the cooled molten material in the furnace. The refractory bricks deteriorate over time due to wear and thermal stress, and the extent of the solidified layer changes daily depending on the thermal conditions in the lower part of the furnace. This makes it extremely difficult to grasp the state of these constituent materials.
  • the method described in Patent Document 4 also has the following problems.
  • the vibration strength of the actual furnace body is more strongly affected by fluctuations in the air flow rate and changes in the shape of the furnace filler and structures such as hearth bricks and the solidified layer than the molten material level. For this reason, in a blast furnace process where the operating conditions change from moment to moment, it is impossible to establish a one-to-one correlation between the vibration strength of the furnace body and the molten material level. For this reason, the method described in Patent Document 4 is only effective in extremely ideal situations where the conditions inside the furnace other than the molten material level are steady, making it difficult to measure the molten material level stably over the long term.
  • the present invention has been made to solve the above problems, and its purpose is to provide a method and device for measuring the molten material level in a blast furnace that can measure the molten material level in the blast furnace with high accuracy regardless of the operating conditions of the blast furnace. Another purpose of the present invention is to provide a method for operating a blast furnace that can stably perform eco-friendly blast furnace operation.
  • the method for measuring the molten material level in a blast furnace includes a measurement step of measuring the vibration frequency distribution in the height direction of the furnace body using a plurality of vibration meters arranged at a predetermined interval along the height direction of the blast furnace body, a vibration intensity calculation step of calculating the vibration intensity in the frequency range caused by the air blowing at each measurement position by Fourier transforming the vibration frequency distribution, a numerical analysis step of calculating the maximum vibration intensity distribution in the lower part of the blast furnace using a numerical analysis model in which the molten material level in the blast furnace and the air blowing volume are variables, and a molten material level calculation step of calculating the molten material level at which the difference between the vibration intensity calculated in the vibration intensity calculation step and the maximum vibration intensity distribution calculated in the numerical analysis step is minimized, and setting the calculated molten material level as the position of the molten material level in the blast furnace.
  • the vibration meter should be installed between the tap hole level and the tuyere level of the furnace body.
  • the frequency range from the air blowing should be within the range of 700 to 900 Hz.
  • the device for measuring the molten material level in a blast furnace comprises a plurality of vibration meters arranged at predetermined intervals along the height direction of the blast furnace body to measure the vibration frequency distribution in the height direction of the furnace body, and an information processing device which calculates the vibration intensity in the frequency range caused by the air blowing at each measurement position by Fourier transforming the vibration frequency distribution, calculates the maximum vibration intensity distribution in the lower part of the blast furnace using a numerical analysis model with the molten material level in the blast furnace and the air blowing volume as variables, calculates the molten material level at which the difference between the vibration intensity and the maximum vibration intensity distribution is minimized, and sets the calculated molten material level as the position of the molten material level in the blast furnace.
  • the method for operating a blast furnace according to the present invention includes a step of operating the blast furnace according to the smelt level measured using the method for measuring the smelt level in a blast furnace according to the present invention.
  • the method and device for measuring the molten material level in a blast furnace according to the present invention can measure the molten material level in a blast furnace with high accuracy regardless of the operating conditions of the blast furnace. Furthermore, the method for operating a blast furnace according to the present invention can perform stable eco-friendly blast furnace operation.
  • FIG. 1 is a schematic cross-sectional view showing the configuration of a blast furnace to which a molten material level measuring device according to one embodiment of the present invention is applied.
  • FIG. 2 is a diagram showing a calculation flow of a numerical analysis model regarding vibration.
  • FIG. 3 is a diagram showing the configuration of a computational grid.
  • FIG. 4 is a diagram showing an example of analysis of a two-dimensional vibration model.
  • FIG. 5 shows the strength of the vibrations caused by the air blow, as measured by a number of vibrometers, as the melt level is varied, plotted against the height of the measurement position relative to the melt level.
  • FIG. 6 is a graph showing the change over time in the measured value of the molten material level from the early stage to the end of tapping.
  • FIG. 7 is a diagram showing the results of fitting the vibration intensity measured in an actual machine and the maximum vibration intensity predicted by a numerical analysis model with the molten material level.
  • FIG. 1 is a schematic cross-sectional view showing the configuration of a blast furnace to which a device for measuring the level of molten material inside a blast furnace, which is one embodiment of the present invention, is applied.
  • a blast furnace 1 which is one embodiment of the present invention, comprises a substantially cylindrical furnace body 2, a blower tuyere (hereinafter abbreviated as tuyere) 3 provided below the furnace body 2, and a tap hole 4 provided in the furnace body 2 below the tuyere 3.
  • the hearth of the blast furnace 1 is composed of hearth bricks 5 and hearth bricks 6, and the inner and outer wall surfaces of the hearth bricks 6 are covered by a cooling sleeve 7 and an iron shell 8, respectively.
  • the blast furnace 1 which is one embodiment of the present invention, is equipped with a plurality of vibration meters 9, a data logger 10, and an information processing device 11 as devices for measuring the molten material level inside the blast furnace.
  • Each vibration meter 9 is set at equal intervals along a straight line that is perpendicular to the tangent in the circumferential direction of the furnace body 2 and that runs along the surface of the steel shell 8, from the height position of the tap hole 4 to the height position of the tuyere 3.
  • Each vibration meter 9 measures the vibration value of the furnace body 2 as a current value, and outputs an electrical signal indicating the measured current value to the data logger 10.
  • the data logger 10 converts the current values measured by each vibration meter 9 into vibration values based on the electrical signals output from each vibration meter 9.
  • the information processing device 11 calculates the vibration intensity of the furnace body 2 at the installation position of each vibration meter 9 by performing a Fourier transform on the time-lapse data of the vibration values at the installation position (measurement position) of each vibration meter 9 generated by the data logger 10.
  • the information processing device 11 then calculates the molten material level in the blast furnace by executing the measurement method of the molten material level in the blast furnace shown below using the calculated vibration intensity.
  • the vibration of the furnace body 2 has all vibration frequency bands, and that the vibration with the highest peak value and the peak confirmed at all measurement positions is the frequency band of 700 to 900 Hz. Since it was confirmed that the vibration in the frequency band of 700 to 900 Hz has a rough tendency to show high values at positions close to the tuyere 3, it is considered to be vibration caused by the air blow 23 from the tuyere 3 (air blow-derived vibration). Therefore, in the present invention, it was decided to measure the molten material level using the vibration intensity confirmed in the frequency range of 700 to 900 Hz, which corresponds to the air blow-derived vibration.
  • the frequency band in which the air blow-derived vibration is confirmed may change depending on the shape of the furnace body 2 and the influence of the ground, etc., and there is no certainty that this frequency band can be evaluated in the same way for all blast furnaces. For this reason, when applying the present invention to other blast furnaces, it is desirable to analyze the basic vibration frequency band each time.
  • the raw materials iron ore 21 and coke 22 are charged in layers into the furnace body 2 from the top of the furnace and reduced to molten material 24 by blown air (hot air) 23 pumped from the tuyere 3.
  • the molten material 24 is then stored in the bottom of the furnace and discharged as slag 25 from the tap hole 4 by drilling the tap hole 4 at predetermined intervals.
  • the device for measuring the molten material level in a blast furnace which is one embodiment of the present invention, measures the liquid level of the molten material 24 in the lower part of the furnace as the molten material level.
  • an information processing device 11 first measures the vibration intensity in the height direction perpendicular to the tangent in the circumferential direction of the furnace body 2, and estimates the maximum vibration intensity distribution of the furnace body 2 by executing a numerical analysis model related to vibration.
  • the numerical analysis model related to vibration requires the molten material level and air flow rate as input information, but in this embodiment, the former is treated as variables for fitting the measured data of the vibration intensity distribution to the results of the numerical analysis, and the latter is sequentially imported with blast furnace operation data. In this way, the molten material level can be determined by fitting the measured data of the vibration intensity distribution to the results of the numerical analysis.
  • the numerical analysis model for vibration is explained below.
  • the numerical analysis model for vibration is a physical model that estimates the maximum vibration intensity distribution in the lower part of the furnace, which is composed of the steel shell area and the packed bed area.
  • Figure 2 shows the calculation flow for the numerical analysis model for vibration.
  • the mesh conditions required for setting the calculation grid, the analysis time step, and the density and Young's modulus as the physical properties of the steel shell and packed bed are set.
  • the amount of air blown to the blast furnace 1, which is considered as a vibration source is input as an operational parameter (step S1).
  • the information processing device 11 divides an axisymmetric two-dimensional area 31, which includes one of the tuyere 3 installed at a plurality of locations in the circumferential direction of the furnace body 2 and the central axis of the furnace body 2 in the lower part of the blast furnace 1 composed of the steel shell and the packed bed, into a plurality of element areas 32 and sets a computational grid (step S2), as shown in FIG. 3.
  • each element area 32 is connected by a spring 33 and a dash pod 34, and the acceleration applied to a certain element area 32 is propagated to the surrounding element areas 32 through the spring 33 and the dash pod 34.
  • the spring 33 expresses the restoring force that describes the vibration phenomenon
  • the dash pod 34 expresses the damping force that causes the vibration energy to be lost through various energy conversions during the vibration propagation process.
  • the liquid surface (melt level) L of the molten material is taken into consideration, and the buoyancy and resistance force due to the molten material are applied to the element area 32 whose center of gravity is below the liquid surface L.
  • the information processing device 11 calculates the spring constant k of each element region 32 using the following formula (1) (step S3).
  • E Young's modulus
  • A is the cross-sectional area of the element region 32 in a direction perpendicular to the spring 33
  • L is the length of the element region 32 in the same direction as the spring 33.
  • the numerical analysis model is a two-dimensional analysis model
  • A is set to the square of the length of the element region 32 perpendicular to the spring 33.
  • the spring constant k is obtained as a material property of each element region 32, the average value of the spring constants k of the two element regions 32 to be joined is given as the spring constant of the spring 33 joining each element region 32.
  • the information processing device 11 calculates the viscosity coefficient c of each element region 32 using the following formula (2) (step S4).
  • formula (2) m represents the mass of each element region 32.
  • the volume of each element region 32 is given as the product of A and L.
  • the viscosity coefficient c is found as a material property of each element region 32, the average value of the viscosity coefficients c of the two element regions 32 being joined is given as the viscosity coefficient of the dashpod 34 that joins each element region 32.
  • the information processing device 11 uses the processing results of steps S2 and S3 to formulate a vibration equation based on vibration engineering theory for each elemental region 32 as shown in the following formula (3) (step S5).
  • x represents the displacement of each elemental region 32
  • t represents time
  • Cd represents liquid resistance force
  • F represents buoyancy and external airflow force.
  • the radial position of the two-dimensional region 31 is represented by the subscript I
  • the height position is represented by the subscript J.
  • the above formula (3) is based on Newton's equation of motion, and the left side takes into account the inertial force of each element region 32, and the right side takes into account the restoring force, damping force, liquid resistance force, buoyancy force, and external airflow force acting on each element region 32.
  • the formula is based on the assumption that the restoring force is proportional to the magnitude of the displacement of each element region 32, and the damping force is proportional to the speed of each element region 32.
  • the liquid resistance force Cd was calculated using the Kozeny-Carman formula, and the external airflow force was calculated as the product of the pressure loss in front of the tuyere calculated using the Ergun formula and the surface area of the raceway calculated using the raceway depth estimation formula.
  • the above formula (5) is an equation related to the maximum acceleration of the element region 32 represented by the coordinates (I, J) of interest and the four surrounding element regions 32.
  • the above formula (5) is formulated for all element regions 32, it becomes a simultaneous equation related to the maximum acceleration a of all element regions 32.
  • the information processing device 11 calculates the maximum acceleration a of each element region 32, and calculates the maximum vibration intensity distribution of the furnace body 2 by substituting the calculated maximum acceleration a into formula (4) (step S6). Then, the information processing device 11 repeatedly executes this process until the maximum vibration intensity distribution of the furnace body 2 reaches a steady state (step S7).
  • the vibration frequency ⁇ is set to 800 Hz, which is the average value of the actually measured vibration frequencies from the air blowing of 700 to 900 Hz.
  • the maximum vibration intensity distribution of the lower furnace part which is composed of the steel shell and the packed bed, can be estimated based on vibration engineering theory, but the molten material level remains as an unknown parameter.
  • the range in which the liquid resistance force and buoyancy force in formula (3) act changes depending on the setting of the molten material level, so the molten material level also affects the calculation result of the maximum vibration intensity distribution. For this reason, the information processing device 11 next determines the molten material level using the molten material level as a variable so that the error between the vibration intensity distribution measured multiple times in the height direction of the furnace body 2 and the maximum vibration intensity distribution estimated by this numerical analysis model is minimized.
  • Figure 4 shows an example of analysis using a two-dimensional vibration model. As shown in Figure 4, it can be seen that the blast vibration generated in the raceway space where the coke is vigorously burning and rotating due to the blast pressure in front of the tuyere 3 gradually dissipates energy and attenuates as it propagates to the surrounding area. In the analysis example shown in Figure 4, it was assumed that the molten material surface exists in an area of 2/3 of the distance from the hearth to the tuyere 3, and it was possible to confirm that the vibration intensity attenuates discontinuously at the interface.
  • Figure 5 shows the results of plotting the blast-induced vibration intensity measured by multiple vibration meters 9 when the molten material level was changed using a cold model simulating the lower part of a blast furnace 1 against the relative measurement position height of the vibration meters 9 to the molten material level (vibration meter height based on the liquid level).
  • the blast-induced vibration intensity changes discontinuously at the surface layer of the molten material, and this result qualitatively coincided with the predicted result of the numerical analysis model shown in Figure 4.
  • pulverized coal was injected from the tuyere using normal charging materials, and the vibration of the furnace body was measured using vibration meters installed at equal intervals on a line perpendicular to the tangent line of the circumferential direction of the furnace body from the tap hole level (height position 2 m) to the tuyere level, and the molten material level in the blast furnace was measured.
  • Table 1 shows the operating conditions of Examples 1 and 2.
  • FIG. 6 shows the time change of the measured value of the molten material level from the early stage of tapping to the end of tapping.
  • FIG. 7 shows the result of fitting the vibration intensity measured in the actual machine and the maximum vibration intensity estimated by the numerical analysis model with the molten material level.
  • the molten material level was finally about the same as the tap hole level. From this, it was confirmed that the molten material level can be measured with high accuracy according to the present invention.
  • FIG. 7(a) in the early stage of tapping, the difference between the actual value and the estimated value was minimized by setting the molten material level to about 4.0 m.
  • FIG. 7(b) at the end of the tapping stage, the difference between the actual value and the estimated value was minimized by setting the residual iron and slag level to 2.0 m.
  • the present invention provides a method and device for measuring the molten material level in a blast furnace, which can measure the molten material level in the blast furnace with high accuracy regardless of the operating conditions of the blast furnace.
  • the present invention also provides a method for operating a blast furnace, which can stably perform eco-friendly blast furnace operation.

Landscapes

  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Manufacturing & Machinery (AREA)
  • Materials Engineering (AREA)
  • Metallurgy (AREA)
  • Organic Chemistry (AREA)
  • Blast Furnaces (AREA)

Abstract

Le procédé de mesure du niveau de matière fondue à l'intérieur d'un haut-fourneau selon la présente invention comprend : une étape de mesure pour mesurer la distribution de fréquence vibratoire dans la direction de hauteur d'un corps de four du haut-fourneau à l'aide de multiples indicateurs de vibration disposés à une distance prédéterminée le long de la direction de hauteur du corps de four ; une étape de calcul d'intensité vibratoire pour calculer l'intensité vibratoire dans une plage de fréquences provenant d'un souffle à chaque emplacement de mesure par transformation de Fourier de la distribution de fréquence vibratoire ; une étape d'analyse de valeur numérique pour calculer la distribution d'intensité vibratoire maximale dans une partie inférieure du haut-fourneau à l'aide d'un modèle d'analyse de valeur numérique avec la quantité de souffle et le niveau de matière fondue à l'intérieur du haut-fourneau en tant que variables ; et une étape de calcul de niveau de matière fondue pour calculer le niveau de matière fondue auquel la différence entre l'intensité vibratoire calculée dans l'étape de calcul d'intensité vibratoire et la distribution d'intensité vibratoire maximale calculée dans l'étape d'analyse de valeur numérique est réduite au minimum, et la prise du niveau de matière fondue calculé en tant que position du niveau de matière fondue à l'intérieur du haut-fourneau.
PCT/JP2023/035199 2023-01-30 2023-09-27 Procédé de mesure de niveau de matière fondue à l'intérieur d'un haut-fourneau, dispositif de mesure de niveau de matière fondue à l'intérieur d'un haut-fourneau, et procédé de fonctionnement de haut-fourneau Ceased WO2024161701A1 (fr)

Priority Applications (4)

Application Number Priority Date Filing Date Title
CN202380091984.6A CN120569495A (zh) 2023-01-30 2023-09-27 高炉炉内的熔融物高度的测量方法、高炉炉内的熔融物高度的测量装置以及高炉的运行方法
EP23919837.7A EP4636099A1 (fr) 2023-01-30 2023-09-27 Procédé de mesure de niveau de matière fondue à l'intérieur d'un haut-fourneau, dispositif de mesure de niveau de matière fondue à l'intérieur d'un haut-fourneau, et procédé de fonctionnement de haut-fourneau
KR1020257025390A KR20250129751A (ko) 2023-01-30 2023-09-27 고로 로 내의 용융물 레벨의 계측 방법, 고로 로 내의 용융물 레벨의 계측 장치 및, 고로의 조업 방법
JP2024510526A JP7513226B1 (ja) 2023-01-30 2023-09-27 高炉炉内の溶融物レベルの計測方法、高炉炉内の溶融物レベルの計測装置、及び高炉の操業方法

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
JP2023-011841 2023-01-30
JP2023011841 2023-01-30

Publications (1)

Publication Number Publication Date
WO2024161701A1 true WO2024161701A1 (fr) 2024-08-08

Family

ID=92146050

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/JP2023/035199 Ceased WO2024161701A1 (fr) 2023-01-30 2023-09-27 Procédé de mesure de niveau de matière fondue à l'intérieur d'un haut-fourneau, dispositif de mesure de niveau de matière fondue à l'intérieur d'un haut-fourneau, et procédé de fonctionnement de haut-fourneau

Country Status (2)

Country Link
TW (1) TWI853731B (fr)
WO (1) WO2024161701A1 (fr)

Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH03100110A (ja) * 1989-09-13 1991-04-25 Sumitomo Metal Ind Ltd 炉内装入物の分布測定装置
JPH10140218A (ja) * 1996-11-08 1998-05-26 Sumitomo Metal Ind Ltd 高炉炉底管理方法
JP2002302709A (ja) 2001-04-05 2002-10-18 Sumitomo Metal Ind Ltd 高炉操業方法
JP2015528905A (ja) 2012-07-13 2015-10-01 サントル ド ルシェルシュ メタリュルジク アエスベエル−セントラムヴォール リサーチ イン デ メタルージー フェーゼットヴェー 溶鉱炉中の鋳鉄及びスラグのレベルを測定するための方法及び装置
JP7056813B1 (ja) 2021-03-26 2022-04-19 Ｊｆｅスチール株式会社 溶融物高さの検出方法
WO2022201717A1 (fr) 2021-03-23 2022-09-29 Ｊｆｅスチール株式会社 Procédé de détection de hauteur de laitier de fonte et dispositif de détection de hauteur de laitier de fonte

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
TWI431241B (zh) * 2011-02-18 2014-03-21 China Steel Corp Non - destructive measurement method for furnace wall thickness of high temperature furnace
RU2612477C2 (ru) * 2012-08-03 2017-03-09 Кабусики Кайся Кобе Сейко Се (Кобе Стил, Лтд.) Способ производства металлического железа
PH12019501367B1 (en) * 2016-12-16 2023-07-12 Jfe Steel Corp Blast furnace operation method

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH03100110A (ja) * 1989-09-13 1991-04-25 Sumitomo Metal Ind Ltd 炉内装入物の分布測定装置
JPH10140218A (ja) * 1996-11-08 1998-05-26 Sumitomo Metal Ind Ltd 高炉炉底管理方法
JP2002302709A (ja) 2001-04-05 2002-10-18 Sumitomo Metal Ind Ltd 高炉操業方法
JP2015528905A (ja) 2012-07-13 2015-10-01 サントル ド ルシェルシュ メタリュルジク アエスベエル−セントラムヴォール リサーチ イン デ メタルージー フェーゼットヴェー 溶鉱炉中の鋳鉄及びスラグのレベルを測定するための方法及び装置
WO2022201717A1 (fr) 2021-03-23 2022-09-29 Ｊｆｅスチール株式会社 Procédé de détection de hauteur de laitier de fonte et dispositif de détection de hauteur de laitier de fonte
JP7056813B1 (ja) 2021-03-26 2022-04-19 Ｊｆｅスチール株式会社 溶融物高さの検出方法

Also Published As

Publication number Publication date
TW202430653A (zh) 2024-08-01
TWI853731B (zh) 2024-08-21

Similar Documents

Publication Publication Date Title
AU2005203598B2 (en) Systems, methods and apparatus for non-disruptive and non-destructive inspection of metallurgical furnaces and similar vessels
JP3033466B2 (ja) 高炉の操業方法
JP7513226B1 (ja) 高炉炉内の溶融物レベルの計測方法、高炉炉内の溶融物レベルの計測装置、及び高炉の操業方法
JP7694747B1 (ja) 高炉炉内の溶融物レベルの計測方法、高炉炉内の溶融物レベルの計測装置、及び高炉の操業方法
JP6669024B2 (ja) 高炉内の溶銑の流速推定方法および高炉の操業方法
WO2024161701A1 (fr) Procédé de mesure de niveau de matière fondue à l'intérieur d'un haut-fourneau, dispositif de mesure de niveau de matière fondue à l'intérieur d'un haut-fourneau, et procédé de fonctionnement de haut-fourneau
CN116981783A (zh) 熔融物高度的检测方法
JP7694748B1 (ja) 高炉炉内の溶融物レベルの計測方法、高炉炉内の溶融物レベルの計測装置、及び高炉の操業方法
Mohanty et al. Computational modeling of blast furnace stave cooler based on steady state heat transfer analysis
TWI881504B (zh) 高爐爐內的熔融物位準的測量方法、高爐爐內的熔融物位準的測量裝置及高爐的操作方法
JP7307341B2 (ja) 炉内ガス圧力の変動検知方法
EP1893972B1 (fr) Systemes, procedes et dispositif d'inspection non destructive et n'entrainant pas d'interruption de fourneaux metallurgiques et de cuves similaires
WO2024150464A1 (fr) Procédé de détection de hauteur de matériau fondu, dispositif de détection de hauteur de matériau fondu et procédé de production de matériau fondu
JP2727563B2 (ja) 高炉操業方法
JP4634660B2 (ja) 高炉炉下部の管理方法
JP7485247B1 (ja) 溶融物高さの検出方法、溶融物高さの検出装置および溶融物の製造方法
WO2025150235A1 (fr) Procédé de commande et dispositif de commande de haut fourneau
CN113283078B (zh) 一种高炉风口回旋区深度的计算及实时监测方法
CN121134364A (zh) 布料机的下料嘴的结构优化方法、下料嘴以及布料机
Bhagat Optimization of refractory lining used in blast furnace
Chen et al. The safety thickness of blast furnace hearth lining and simulation analysis for different interventions
TW202234027A (zh) 液體的液面高度的檢測方法及檢測裝置、熔融物體的液面高度的檢測方法及檢測裝置、及立式爐的操作方法
WO2022201721A1 (fr) Procédé de détection de la hauteur d'un matériau fondu
JPH03249109A (ja) 高炉内スラグ残留量の測定装置
JPS5825406A (ja) 高炉操炉方法

Legal Events

Date Code Title Description
WWE Wipo information: entry into national phase

Ref document number: 2024510526

Country of ref document: JP

121 Ep: the epo has been informed by wipo that ep was designated in this application

Ref document number: 23919837

Country of ref document: EP

Kind code of ref document: A1

WWE Wipo information: entry into national phase

Ref document number: 2023919837

Country of ref document: EP

ENP Entry into the national phase

Ref document number: 2023919837

Country of ref document: EP

Effective date: 20250716

WWE Wipo information: entry into national phase

Ref document number: 202380091984.6

Country of ref document: CN

REG Reference to national code

Ref country code: BR

Ref legal event code: B01A

Ref document number: 112025013308

Country of ref document: BR

WWE Wipo information: entry into national phase

Ref document number: 202517069952

Country of ref document: IN

WWP Wipo information: published in national office

Ref document number: 202517069952

Country of ref document: IN

WWP Wipo information: published in national office

Ref document number: 1020257025390

Country of ref document: KR

Ref document number: 202380091984.6

Country of ref document: CN

NENP Non-entry into the national phase

Ref country code: DE

WWP Wipo information: published in national office

Ref document number: 2023919837

Country of ref document: EP