EP4545654A1 - Material discharge control device and material charging device - Google Patents

Material discharge control device and material charging device Download PDF

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Publication number
EP4545654A1
EP4545654A1 EP23857176.4A EP23857176A EP4545654A1 EP 4545654 A1 EP4545654 A1 EP 4545654A1 EP 23857176 A EP23857176 A EP 23857176A EP 4545654 A1 EP4545654 A1 EP 4545654A1
Authority
EP
European Patent Office
Prior art keywords
raw material
discharge
hopper
discharge amount
property
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.)
Pending
Application number
EP23857176.4A
Other languages
German (de)
English (en)
French (fr)
Inventor
Toshiki Tsuboi
Ryo Saito
Haruki DOKKO
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
Publication of EP4545654A1 publication Critical patent/EP4545654A1/en
Pending legal-status Critical Current

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Classifications

    • C—CHEMISTRY; METALLURGY
    • C21—METALLURGY OF IRON
    • C21B—MANUFACTURE OF IRON OR STEEL
    • C21B7/00—Blast furnaces
    • C21B7/18—Bell-and-hopper arrangements
    • C21B7/20—Bell-and-hopper arrangements with appliances for distributing the burden
    • C—CHEMISTRY; METALLURGY
    • C21—METALLURGY OF IRON
    • C21B—MANUFACTURE OF IRON OR STEEL
    • C21B5/00—Making pig-iron in the blast furnace
    • C21B5/006—Automatically controlling the process
    • C—CHEMISTRY; METALLURGY
    • C21—METALLURGY OF IRON
    • C21B—MANUFACTURE OF IRON OR STEEL
    • C21B5/00—Making pig-iron in the blast furnace
    • C21B5/008—Composition or distribution of the charge
    • C—CHEMISTRY; METALLURGY
    • C21—METALLURGY OF IRON
    • C21B—MANUFACTURE OF IRON OR STEEL
    • C21B7/00—Blast furnaces
    • C21B7/18—Bell-and-hopper arrangements
    • 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
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F27—FURNACES; KILNS; OVENS; RETORTS
    • F27B—FURNACES, KILNS, OVENS OR RETORTS IN GENERAL; OPEN SINTERING OR LIKE APPARATUS
    • F27B1/00—Shaft or like vertical or substantially vertical furnaces
    • F27B1/10—Details, accessories or equipment specially adapted for furnaces of these types
    • F27B1/20—Arrangements of devices for charging
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F27—FURNACES; KILNS; OVENS; RETORTS
    • F27B—FURNACES, KILNS, OVENS OR RETORTS IN GENERAL; OPEN SINTERING OR LIKE APPARATUS
    • F27B1/00—Shaft or like vertical or substantially vertical furnaces
    • F27B1/10—Details, accessories or equipment specially adapted for furnaces of these types
    • F27B1/26—Arrangements of controlling devices
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F27—FURNACES; KILNS; OVENS; RETORTS
    • F27D—DETAILS OR ACCESSORIES OF FURNACES, KILNS, OVENS OR RETORTS, IN SO FAR AS THEY ARE OF KINDS OCCURRING IN MORE THAN ONE KIND OF FURNACE
    • F27D19/00—Arrangements of controlling devices
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F27—FURNACES; KILNS; OVENS; RETORTS
    • F27D—DETAILS OR ACCESSORIES OF FURNACES, KILNS, OVENS OR RETORTS, IN SO FAR AS THEY ARE OF KINDS OCCURRING IN MORE THAN ONE KIND OF FURNACE
    • F27D3/00—Charging; Discharging; Manipulation of charge
    • F27D3/10—Charging directly from hoppers or shoots
    • C—CHEMISTRY; METALLURGY
    • C21—METALLURGY OF IRON
    • C21B—MANUFACTURE OF IRON OR STEEL
    • C21B2300/00—Process aspects
    • C21B2300/04—Modeling of the process, e.g. for control purposes; CII

Definitions

  • the present disclosure relates to a raw material discharge control apparatus and a raw material charging apparatus.
  • the raw material In a production process that uses raw material such as minerals, the raw material is discharged from a raw material hopper that temporarily stores the raw material. At this time, it is important to control the discharge amount of raw material discharged from the raw material hopper, because the discharge amount of raw material affects productivity.
  • raw material discharged from the raw material hopper is charged into the furnace through a rotating chute.
  • the charged material is deposited in the furnace and forms a certain deposition shape.
  • This deposition shape has a significant impact on conditions in the furnace. Consequently, if the discharge amount of raw material fluctuates over time, the conditions in the furnace may deteriorate.
  • one known technique attempts to control the discharge amount of raw material to be constant by maintaining a constant degree of opening of the raw material hopper.
  • the discharge amount of material raw ends up fluctuating over time even when the degree of opening of the raw material hopper is kept constant.
  • it has been difficult to capture temporal fluctuations in raw material properties over a short period of time because the values for raw material properties have been calculated about once a week through batch sampling and sieve analysis of small amounts.
  • Patent Literature (PTL) 1 discloses a technique for constantly calculating the degree of opening of the raw material hopper and the actual value of the raw material discharge rate and adjusting the degree of opening of the raw material hopper to achieve a target raw material discharge rate, in order to control the discharge amount of raw material from the raw material hopper to be constant.
  • the discharge amount of raw material discharged from a raw material hopper can be accurately controlled even when there are changes in the properties of the raw material.
  • FIG. 1 is a diagram schematically illustrating an example configuration of a raw material charging apparatus 1 that includes a raw material discharge control apparatus 10 according to an embodiment of the present disclosure.
  • FIG. 2 is an enlarged view of the area near a raw material hopper 20 in FIG. 1 . Referring to FIGS. 1 and 2 , the raw material charging apparatus 1 and raw material discharge control apparatus 10 are described.
  • the raw material charging apparatus 1 is an apparatus that charges raw material 203, carried by a conveyor 202 for charging raw material, into a blast furnace 201.
  • the raw material charging apparatus 1 includes the raw material discharge control apparatus 10, the raw material hopper 20, a flow regulating gate 30, and a rotating chute 40.
  • the raw material charging apparatus 1 charges the raw material 203 into the blast furnace 201 by using the raw material discharge control apparatus 10 to control the discharge amount of the raw material 203 discharged from the raw material hopper 20.
  • the raw material discharge control apparatus 10 is used in the raw material charging apparatus 1, which charges the raw material 203 carried by the conveyor 202 into the blast furnace 201, is described as an example, but the process in which the raw material discharge control apparatus 10 is used is not limited to this example.
  • the raw material discharge control apparatus 10 can be used in any process that uses the raw material hopper 20 to charge the raw material 203.
  • the raw material 203 may be coke but is not limited to this example.
  • the raw material 203 may, for example, be ore, sintered ore, pellets, limestone, rock, concrete raw material, powder and granular material, or the like.
  • the raw material discharge control apparatus 10 controls the discharge amount of the raw material 203 discharged from the raw material hopper 20.
  • the raw material discharge control apparatus 10 includes a control unit 11 and a raw material property measurement unit 12. Details on the configuration and functions of the raw material discharge control apparatus 10 are described below.
  • the raw material hopper 20 temporarily stores the raw material 203 transported by the conveyor 202.
  • the raw material hopper 20 can discharge the stored raw material 203 into the blast furnace 201.
  • the flow regulating gate 30 can control the discharge amount of the raw material 203 discharged from the raw material hopper 20.
  • the flow regulating gate 30 is a gate whose degree of opening can be adjusted. As the degree of opening of the flow regulating gate 30 is greater, the discharge amount of the raw material 203 discharged from the raw material hopper 20 increases. As the degree of opening of the flow regulating gate 30 is smaller, the discharge amount of the raw material 203 discharged from the raw material hopper 20 decreases.
  • the degree of opening of the flow regulating gate 30 is controlled by the control unit 11.
  • the rotating chute 40 is arranged at the top of the blast furnace 201.
  • the rotating chute 40 turns at a predetermined speed.
  • the raw material 203 discharged from the raw material hopper 20 is charged into the blast furnace 201 through the rotating chute 40.
  • control unit 11 and raw material property measurement unit 12 included in the raw material discharge control apparatus 10 are described.
  • the control unit 11 acquires property values of the raw material 203 as measured by the raw material property measurement unit 12.
  • the property values of the raw material 203 measured by the raw material property measurement unit 12 are the property values of the raw material 203 being transported by the conveyor 202, i.e., the property values of the raw material 203 before the raw material 203 is charged into the raw material hopper 20.
  • the control unit 11 controls the discharge amount of the raw material 203 discharged from the raw material hopper 20 based on the property values of the raw material 203 as acquired from the raw material property measurement unit 12.
  • the control unit 11 controls the discharge amount of the raw material 203 discharged from the raw material hopper 20 by adjusting the degree of opening of the flow regulating gate 30.
  • FIG. 3 is a diagram schematically illustrating an example configuration of the control unit 11 according to an embodiment of the present disclosure.
  • the control unit 11 may be a general-purpose computer, such as a workstation or personal computer, or may be a dedicated computer configured to function as the control unit 11 of the raw material discharge control apparatus 10. Referring to FIG. 3 , the configuration of the control unit 11 is described.
  • the control unit 11 includes a controller 111, an input interface 112, an output interface 113, a memory 114, and a communication interface 115.
  • the controller 111 includes at least one processor, at least one dedicated circuit, or a combination thereof.
  • the processor is a general-purpose processor such as a Central Processing Unit (CPU) or a Graphics Processing Unit (GPU), or a dedicated processor that is dedicated to specific processing.
  • Examples of dedicated circuits can include a Field-Programmable Gate Array (FPGA) and an Application Specific Integrated Circuit (ASIC).
  • the controller 111 reads programs, data, and the like stored in the memory 114 and executes various functions.
  • the controller 111 controls the flow regulating gate 30.
  • the input interface 112 includes one or more interfaces for input to detect user input and acquire input information based on user operations.
  • the input interface 112 includes a physical key, a capacitive key, a touch screen integrally provided with a display of the output interface 113, or a microphone that accepts voice input.
  • the output interface 113 includes one or more interfaces for output to output information and notify the user.
  • the output interface 113 includes a display for outputting information in the form of images or a speaker for outputting information in the form of audio.
  • the display included in the output interface 113 may, for example, be a Liquid Crystal Display (LCD), a Cathode Ray Tube (CRT) display, or the like.
  • the memory 114 is, for example, a flash memory, a hard disk, an optical memory, or the like. A portion of the memory 114 may be external to the control unit 11. In this case, the portion of the memory 114 may be a hard disk, a memory card, or the like connected to the control unit 11 by any interface.
  • the memory 114 stores programs for the controller 111 to perform each function, data used by the programs, and the like.
  • the communication interface 115 includes at least one of a communication module compatible with wired communication and a communication module compatible with wireless communication.
  • the control unit 11 can communicate with other apparatuses and the like via the communication interface 115.
  • the raw material property measurement unit 12 measures the property values of the raw material 203 being carried by the conveyor 202. In other words, the raw material property measurement unit 12 measures the property values of the raw material 203 before the raw material 203 is charged into the raw material hopper 20.
  • the property values measured by the raw material property measurement unit 12 include at least one of particle size, shape, moisture content, and surface condition of the raw material.
  • the significance of the raw material property measurement unit 12 measuring the particle size, shape, moisture content, and surface condition of the raw material 203 as the property values of the raw material 203 is now described.
  • the particle size of the raw material 203 is described. As the particle size of the raw material 203 is smaller, the friction between particles of the raw material 203 is reduced. It is thought that because of the resulting increase in fluidity of the raw material 203, the discharge rate of the raw material 203 discharged from the raw material hopper 20 becomes faster for the same degree of opening of the flow regulating gate 30. The particle size of the raw material 203 thus affects the discharge rate of the raw material 203 from the raw material hopper 20.
  • the shape of the raw material 203 is described. If the shape of the raw material 203 is angular, it is thought that the discharge rate of the raw material 203 discharged from the raw material hopper 20 becomes slower for the same degree of opening of the flow regulating gate 30. The shape of the raw material 203 thus affects the discharge rate of the raw material 203 from the raw material hopper 20.
  • the moisture content of the raw material 203 is described. As the moisture content of the raw material 203 increases, the density of the raw material 203 increases and the friction on the surface of the raw material 203 decreases. It is then thought that the discharge rate of the raw material 203 discharged from the raw material hopper 20 becomes faster for the same degree of opening of the flow regulating gate 30. The moisture content of the raw material 203 thus affects the discharge rate of the raw material 203 from the raw material hopper 20.
  • Influencing factors that express the surface condition of the raw material 203 include the roughness of the surface itself, the amount of moisture on the surface, and the amount of powder on the surface. Changes in these influencing factors change the friction of the raw material 203, which in turn changes the discharge rate of the raw material 203 discharged from the raw material hopper 20.
  • the surface condition of the raw material 203 thus affects the discharge rate of the raw material 203 from the raw material hopper 20.
  • the particle size, shape, moisture content, and surface condition of the raw material 203 as the property values of the raw material 203 thus affect the discharge rate of the raw material 203 discharged from the raw material hopper 20. Therefore, the raw material property measurement unit 12 measures property values such as the particle size, shape, moisture content, and surface condition of the raw material 203, and the control unit 11 controls the discharge amount of the raw material 203 discharged from the raw material hopper 20 based on the property values of the raw material 203, thereby enabling the discharge amount of the raw material 203 to be accurately controlled.
  • the raw material property measurement unit 12 includes a distance measurement apparatus, an image measurement apparatus, and a moisture measurement apparatus.
  • the raw material property measurement unit 12 may include either a distance measurement apparatus or an image measurement apparatus, rather than both a distance measurement apparatus and an image measurement apparatus.
  • the distance measurement apparatus and the image measurement apparatus can measure the particle size, shape, and surface condition of the raw material 203.
  • the moisture measurement apparatus can measure the moisture content of the raw material 203.
  • the distance measurement apparatus may, for example, be a two-dimensional laser rangefinder.
  • a laser rangefinder irradiates a laser beam in a line along the width direction of the conveyor 202 to measure the distance to the raw material 203 to be measured, one line at a time.
  • the laser rangefinder measures the distance to the raw material 203 in a line at regular intervals.
  • the laser rangefinder can generate 3D shape data for the raw material 203 by integrating the distance measurements at each line.
  • the image measurement apparatus may calculate the particle size of the raw material 203 by, for example, averaging the diameters of individual particles obtained by image processing.
  • particle size can be used.
  • the circular equivalent diameter, major axis length, minor axis length, Feret diameter, or the like can be used as the definition of the particle size.
  • the image measurement apparatus can calculate the shape of individual particles of the raw material 203 by identifying the individual particles.
  • the image measurement apparatus may calculate the shape of the raw material 203 by averaging the diameters of individual particles.
  • particle shape can be used.
  • the circularity, convexity, solidity, or the like can be used as the definition of the particle shape.
  • a distance measurement apparatus such as a laser rangefinder can calculate the surface roughness, which is one of the surface conditions.
  • Various methods exist for calculating surface roughness For example, general indices such as Ra and Rz can be used. The method of calculating the surface roughness is not limited to this example, and any index related to the degree of unevenness affecting friction can be used.
  • the amount of powder the weight percentage of the fine grain portion obtained from the particle size measurement, such as the weight percentage of the particle size data below 5 mm, can be used as an index.
  • the moisture measurement apparatus may, for example, be a neutron moisture meter or an infrared moisture meter.
  • the neutron moisture meter irradiates neutrons from a neutron source.
  • the irradiated neutrons are partly transmitted through the raw material 203 and partly reflected depending on the moisture content of the raw material 203.
  • the neutron moisture meter can detect the reflected neutrons and calculate the value of the moisture content based on the amount of reflection.
  • the infrared moisture meter can measure the moisture content using infrared wavelengths that have absorption sensitivity to moisture.
  • the infrared moisture meter can irradiate infrared rays onto the raw material 203 and calculate the value of the moisture content based on the degree of absorption.
  • the controller 111 of the control unit 11 acquires, via the communication interface 115, the property values of the raw material 203 as measured by the raw material property measurement unit 12.
  • the memory 114 may store coefficients for estimating the discharge rate of the raw material 203 discharged from the raw material hopper 20, taking the degree of opening of the flow regulating gate 30 and the property values of the raw material 203 as explanatory variables. These coefficients may be coefficients calculated by multiple regression analysis based on pre-measured actual values. In a case in which the property values of the raw material 203 include a plurality of values such as particle size, shape, moisture content, surface condition, and the like, the memory 114 may store coefficients for estimating the discharge rate of the raw material 203 with each value as an explanatory variable.
  • FIGS. 4A to 4E are diagrams illustrating examples comparing estimated values and actual values of the discharge rate.
  • the horizontal axis represents the estimated discharge rate of the raw material 203, as calculated by the control unit 11.
  • the vertical axis represents the actual value of the discharge rate when the raw material 203 was actually charged into the blast furnace 201.
  • FIG. 4D is a graph of the case in which the discharge rate of the raw material 203 is estimated based on the particle size and the moisture content of the raw material 203 as property values of the raw material 203, along with the degree of opening of the flow regulating gate 30.
  • FIG. 4E is a graph of the case in which the discharge rate of the raw material 203 is estimated based on the particle size, the moisture content, and the shape of the raw material 203 as property values of the raw material 203, along with the degree of opening of the flow regulating gate 30.
  • the coefficient of determination R 2 is 0.31 in the case in which the discharge rate is estimated based solely on the degree of opening of the flow regulating gate 30.
  • the coefficient of determination is 0.41 in the case in which the discharge rate is estimated based on the degree of opening of the flow regulating gate 30 and the moisture content, which is a property value of the raw material 203.
  • the coefficient of determination is 0.39 in the case in which the discharge rate is estimated based on the degree of opening of the flow regulating gate 30 and the particle size, which is a property value of the raw material 203.
  • the coefficient of determination is 0.46 in the case in which the discharge rate is estimated based on the degree of opening of the flow regulating gate 30 and on the particle size and moisture content, which are property values of the raw material 203.
  • the coefficient of determination is 0.60 in the case in which the discharge rate is estimated based on the degree of opening of the flow regulating gate 30 and on the particle size, moisture content, and shape, which are property values of the raw material 203.
  • the results in FIGS. 4A to 4E indicate that the control unit 11 can accurately estimate the discharge rate of the raw material 203 by considering the property values of the raw material 203.
  • the control unit 11 can control the discharge amount of the raw material 203 based on the discharge rate of the raw material 203 accurately estimated in this way.
  • FIGS. 4A to 4E also indicate that the control unit 11 can estimate the discharge rate of the raw material 203 even more accurately when a plurality of values are considered as the property values of the raw material 203.
  • the absolute value of the property value was used as the value calculated from at least one of the property values of the raw material 203.
  • FIG. 5 is a diagram illustrating the change over time in various data.
  • the top graph illustrates the change over time in the particle size of the raw material 203.
  • the second graph illustrates the change over time in the degree of opening of the flow regulating gate 30.
  • the bottom graph illustrates the discharge rate of the raw material 203.
  • the particle size of the raw material 203 is low at the timing indicated by the reference sign 401. This is accompanied by a rapid increase in the discharge rate of the raw material 203, as indicated by the reference sign 402. This increase in the discharge rate of the raw material 203 has a negative effect on the operation of the blast furnace 201.
  • the particle size of the raw material 203 is once again low at the timing indicated by the reference sign 404. At this time, the particle size of the raw material 203 is below a threshold 407. Therefore, as indicated by the reference sign 405, the raw material discharge control apparatus 10 implemented control to reduce the degree of opening of the flow regulating gate 30. As a result, the raw material discharge control apparatus 10 was able to suppress the increase in the discharge rate of the raw material 203 in the time range indicated by the reference sign 406. In other words, the raw material discharge control apparatus 10 was able to stabilize the discharge rate of the raw material 203 by controlling the flow regulating gate 30 based on the particle size, which is a property value of the raw material 203.
  • the raw material discharge control apparatus 10 includes a raw material property measurement unit 12 that measures property values of the raw material 203 to be charged into the raw material hopper 20, and a control unit 11 that controls the discharge amount of the raw material 203 based on the property values of the raw material 203.
  • the control unit 11 thus controlling the discharge amount of the raw material 203 based on the property values of the raw material 203, the raw material discharge control apparatus 10 according to the present embodiment can accurately control the discharge amount of the raw material 203 discharged from the raw material hopper 20, even if the properties of the raw material 203 change.
  • the raw material charging apparatus 1 charges the raw material 203 into the blast furnace 201 by using the raw material discharge control apparatus 10 to control the discharge amount of the raw material 203. Therefore, the raw material charging apparatus 1 according to the present embodiment can accurately control the distribution shape of the raw material 203 deposited in the blast furnace 201, thus stabilizing the operation of the blast furnace 201.
  • FIG. 6A illustrates the results of estimation using only the differential value of the degree of opening.
  • FIG. 6B illustrates the results of predicting the differential value of the discharge rate using the differential values of particle size, moisture content, and degree of opening.
  • the determination coefficient R 2 is 0.57.
  • the determination coefficient R 2 is 0.64. The addition of particle size and moisture content to the prediction thus improves the accuracy of the coefficient of determination R 2 to 0.64, indicating that particle size and moisture content are useful in predicting relative change.
  • the present disclosure is not limited to the embodiments described above.
  • a plurality of blocks described in the block diagrams may be integrated, or a block may be divided.
  • the plurality of steps may be executed in parallel or in a different order according to the processing capability of the apparatus that executes each step, or as required.
  • Other modifications can be made without departing from the spirit of the present disclosure.
  • the raw material property measurement unit 12 includes a distance measurement apparatus, an image measurement apparatus, and a moisture measurement apparatus has been described as an example.
  • the apparatuses included in the raw material property measurement unit 12 are not limited to these.
  • the raw material property measurement unit 12 may include any apparatus capable of measuring the property values of the raw material 203.
  • some of the processing operations performed in the raw material property measurement unit 12 may be performed in the control unit 11.
  • the image measurement apparatus may capture images of the raw material 203, and the control unit 11 may calculate the particle size and shape, which are property values of the raw material 203, by analyzing the images of the raw material 203 captured by the image measurement apparatus.
  • the means for controlling the discharge amount of the raw material 203 is not limited to this example.
  • the raw material discharge control apparatus 10 may control the discharge amount of the raw material 203 using an apparatus other than the flow regulating gate 30.
  • the case in which the raw material discharge control apparatus 10 controls the discharge amount of the raw material 203 charged into the blast furnace 201 has been described as an example, but the field in which the raw material discharge control apparatus 10 can be used is not limited to the field of steel production.
  • the raw material discharge control apparatus 10 can also be used in other fields in which raw materials are transported.

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  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Manufacturing & Machinery (AREA)
  • Materials Engineering (AREA)
  • Metallurgy (AREA)
  • Organic Chemistry (AREA)
  • Filling Or Emptying Of Bunkers, Hoppers, And Tanks (AREA)
EP23857176.4A 2022-08-22 2023-08-07 Material discharge control device and material charging device Pending EP4545654A1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
JP2022132085 2022-08-22
PCT/JP2023/028832 WO2024043062A1 (ja) 2022-08-22 2023-08-07 原料排出制御装置及び原料装入装置

Publications (1)

Publication Number Publication Date
EP4545654A1 true EP4545654A1 (en) 2025-04-30

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Application Number Title Priority Date Filing Date
EP23857176.4A Pending EP4545654A1 (en) 2022-08-22 2023-08-07 Material discharge control device and material charging device

Country Status (5)

Country Link
EP (1) EP4545654A1 (enrdf_load_stackoverflow)
JP (1) JP7683730B2 (enrdf_load_stackoverflow)
KR (1) KR20250011184A (enrdf_load_stackoverflow)
CN (1) CN119585446A (enrdf_load_stackoverflow)
WO (1) WO2024043062A1 (enrdf_load_stackoverflow)

Family Cites Families (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5222802B2 (enrdf_load_stackoverflow) * 1973-10-12 1977-06-20
JPS5492389A (en) * 1977-12-29 1979-07-21 Sumitomo Metal Ind Particle distribution measuring method
JPS6137903A (ja) * 1984-07-30 1986-02-22 Nippon Steel Corp 高炉装入原料の切出制御方法
JPH02138407A (ja) * 1988-11-16 1990-05-28 Kawasaki Steel Corp ベルレス高炉における原料装入方法
JPH079006B2 (ja) * 1989-03-27 1995-02-01 日本鋼管株式会社 高炉ベルレス装入設備の制御方法
JPH03175335A (ja) * 1989-12-01 1991-07-30 Sumitomo Metal Ind Ltd 粒度分布測定装置の自動校正方法
JP2942349B2 (ja) 1990-11-29 1999-08-30 川崎製鉄株式会社 高炉の原料装入制御方法
JPH0598329A (ja) * 1991-10-08 1993-04-20 Nkk Corp 高炉原料の粒径測定時に使用するフイーダー
JPH09138070A (ja) * 1995-11-10 1997-05-27 Okawara Mfg Co Ltd 都市ごみ乾燥設備並びにその運転制御方法
JP6743635B2 (ja) * 2016-09-30 2020-08-19 日本製鉄株式会社 制御装置および制御方法

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KR20250011184A (ko) 2025-01-21
CN119585446A (zh) 2025-03-07
JP7683730B2 (ja) 2025-05-27
WO2024043062A1 (ja) 2024-02-29
JPWO2024043062A1 (enrdf_load_stackoverflow) 2024-02-29

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