WO2015133005A1 - 高炉への装入物の装入及び堆積方法、装入物の表面検出装置、並びに高炉の操業方法 - Google Patents
高炉への装入物の装入及び堆積方法、装入物の表面検出装置、並びに高炉の操業方法 Download PDFInfo
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- WO2015133005A1 WO2015133005A1 PCT/JP2014/079114 JP2014079114W WO2015133005A1 WO 2015133005 A1 WO2015133005 A1 WO 2015133005A1 JP 2014079114 W JP2014079114 W JP 2014079114W WO 2015133005 A1 WO2015133005 A1 WO 2015133005A1
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- Prior art keywords
- antenna
- blast furnace
- reflector
- waveguide
- reflecting plate
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Images
Classifications
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- 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
-
- 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
- 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
- F27B1/28—Arrangements of monitoring devices, of indicators, of alarm 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
- F27D21/00—Arrangement of monitoring devices; Arrangement of safety devices
- F27D21/0028—Devices for monitoring the level of the melt
-
- 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
- F27D21/00—Arrangement of monitoring devices; Arrangement of safety devices
- F27D21/04—Arrangement of indicators or alarms
-
- 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
- F27D3/08—Screw feeders; Screw dischargers
-
- 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
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01B—MEASURING LENGTH, THICKNESS OR SIMILAR LINEAR DIMENSIONS; MEASURING ANGLES; MEASURING AREAS; MEASURING IRREGULARITIES OF SURFACES OR CONTOURS
- G01B11/00—Measuring arrangements characterised by the use of optical techniques
- G01B11/24—Measuring arrangements characterised by the use of optical techniques for measuring contours or curvatures
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01B—MEASURING LENGTH, THICKNESS OR SIMILAR LINEAR DIMENSIONS; MEASURING ANGLES; MEASURING AREAS; MEASURING IRREGULARITIES OF SURFACES OR CONTOURS
- G01B15/00—Measuring arrangements characterised by the use of electromagnetic waves or particle radiation, e.g. by the use of microwaves, X-rays, gamma rays or electrons
- G01B15/04—Measuring arrangements characterised by the use of electromagnetic waves or particle radiation, e.g. by the use of microwaves, X-rays, gamma rays or electrons for measuring contours or curvatures
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01S—RADIO DIRECTION-FINDING; RADIO NAVIGATION; DETERMINING DISTANCE OR VELOCITY BY USE OF RADIO WAVES; LOCATING OR PRESENCE-DETECTING BY USE OF THE REFLECTION OR RERADIATION OF RADIO WAVES; ANALOGOUS ARRANGEMENTS USING OTHER WAVES
- G01S13/00—Systems using the reflection or reradiation of radio waves, e.g. radar systems; Analogous systems using reflection or reradiation of waves whose nature or wavelength is irrelevant or unspecified
- G01S13/02—Systems using reflection of radio waves, e.g. primary radar systems; Analogous systems
- G01S13/06—Systems determining position data of a target
- G01S13/08—Systems for measuring distance only
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01S—RADIO DIRECTION-FINDING; RADIO NAVIGATION; DETERMINING DISTANCE OR VELOCITY BY USE OF RADIO WAVES; LOCATING OR PRESENCE-DETECTING BY USE OF THE REFLECTION OR RERADIATION OF RADIO WAVES; ANALOGOUS ARRANGEMENTS USING OTHER WAVES
- G01S13/00—Systems using the reflection or reradiation of radio waves, e.g. radar systems; Analogous systems using reflection or reradiation of waves whose nature or wavelength is irrelevant or unspecified
- G01S13/02—Systems using reflection of radio waves, e.g. primary radar systems; Analogous systems
- G01S13/06—Systems determining position data of a target
- G01S13/08—Systems for measuring distance only
- G01S13/32—Systems for measuring distance only using transmission of continuous waves, whether amplitude-, frequency-, or phase-modulated, or unmodulated
- G01S13/34—Systems for measuring distance only using transmission of continuous waves, whether amplitude-, frequency-, or phase-modulated, or unmodulated using transmission of continuous, frequency-modulated waves while heterodyning the received signal, or a signal derived therefrom, with a locally-generated signal related to the contemporaneously transmitted signal
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01S—RADIO DIRECTION-FINDING; RADIO NAVIGATION; DETERMINING DISTANCE OR VELOCITY BY USE OF RADIO WAVES; LOCATING OR PRESENCE-DETECTING BY USE OF THE REFLECTION OR RERADIATION OF RADIO WAVES; ANALOGOUS ARRANGEMENTS USING OTHER WAVES
- G01S13/00—Systems using the reflection or reradiation of radio waves, e.g. radar systems; Analogous systems using reflection or reradiation of waves whose nature or wavelength is irrelevant or unspecified
- G01S13/88—Radar or analogous systems specially adapted for specific applications
- G01S13/882—Radar or analogous systems specially adapted for specific applications for altimeters
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01S—RADIO DIRECTION-FINDING; RADIO NAVIGATION; DETERMINING DISTANCE OR VELOCITY BY USE OF RADIO WAVES; LOCATING OR PRESENCE-DETECTING BY USE OF THE REFLECTION OR RERADIATION OF RADIO WAVES; ANALOGOUS ARRANGEMENTS USING OTHER WAVES
- G01S13/00—Systems using the reflection or reradiation of radio waves, e.g. radar systems; Analogous systems using reflection or reradiation of waves whose nature or wavelength is irrelevant or unspecified
- G01S13/88—Radar or analogous systems specially adapted for specific applications
- G01S13/89—Radar or analogous systems specially adapted for specific applications for mapping or imaging
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01S—RADIO DIRECTION-FINDING; RADIO NAVIGATION; DETERMINING DISTANCE OR VELOCITY BY USE OF RADIO WAVES; LOCATING OR PRESENCE-DETECTING BY USE OF THE REFLECTION OR RERADIATION OF RADIO WAVES; ANALOGOUS ARRANGEMENTS USING OTHER WAVES
- G01S7/00—Details of systems according to groups G01S13/00, G01S15/00, G01S17/00
- G01S7/02—Details of systems according to groups G01S13/00, G01S15/00, G01S17/00 of systems according to group G01S13/00
- G01S7/03—Details of HF subsystems specially adapted therefor, e.g. common to transmitter and receiver
-
- 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
- F27D2003/0001—Positioning the charge
- F27D2003/0004—Positioning the charge involving devices for measuring the article, the stack of articles or the height of the furnace passage or for adjusting the height of the passage to the charge or for putting the articles in the same position
-
- 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
- F27D2003/0001—Positioning the charge
- F27D2003/0012—Working with piles
-
- 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
- F27D2003/0034—Means for moving, conveying, transporting the charge in the furnace or in the charging facilities
- F27D2003/0062—Means for moving, conveying, transporting the charge in the furnace or in the charging facilities using devices for tilting or rocking the charge
-
- 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
- F27D2019/0028—Regulation
- F27D2019/0075—Regulation of the charge quantity
Definitions
- detection waves such as microwaves and millimeter waves are sent into a blast furnace, and detection waves reflected by iron ore and coke charged in the furnace are detected to detect the charge amount and the surface profile. Relates to the device.
- the present invention also relates to a technique for controlling the deposition profile of charges such as iron ore and coke charged in a blast furnace.
- an opening is provided near the top of the furnace, and a detection wave is transmitted into the furnace through the opening (transmitted wave), and a detection wave (reflected wave) reflected by iron ore or coke charged in the furnace. And the distance to the iron ore and coke and the profile of the surface are detected from the time difference between the transmitted wave and the reflected wave.
- a detection wave a microwave or a millimeter wave is used because it can be used at a high temperature and is not easily affected by suspended matter or water vapor in the furnace.
- the microwave from the microwave transmitting / receiving means 3 is installed in the furnace through an antenna 2 near the tip opening of the lance 1 inserted into the blast furnace 6. Transmitted toward the entrance 7 (iron ore 7a or coke 7b), the microwave reflected by the surface of the charge 7 is received by the antenna 2 and detected by the microwave transmission / reception means 3, and transmission and reception are performed. The distance from the time difference to the surface of the charge 7 is obtained. At this time, the deposition profile of the charge 7 is obtained by reciprocating the lance 1 from the furnace wall 5 toward the core (shown by the broken line 4).
- the lance 1 is a long object about the radius of the furnace and hangs down due to its own weight and does not come out of the furnace, or has a long stroke for movement and a large space outside the furnace. I need it.
- a drive unit for moving the lance 1 is also required.
- the transmitted wave is transmitted through the reflector, reflected by the reflecting surface of the reflector and incident on the furnace through the opening, and the reflected wave reflected by the iron ore and coke in the furnace is incident on the reflector through the opening.
- a detection device has been proposed in which the surface profile is detected by scanning the surface of the iron ore or coke by changing the reflection angle of the reflection surface by the angle changing means while reflecting the light again and sending it to the transmitting / receiving means.
- the antenna is fixed, the reflection plate is arranged to face the antenna, and the angle variable device is arranged on the back surface (the surface opposite to the antenna) of the reflection plate. . Since the antenna is connected to the transmission / reception means, when the antenna and the reflector are arranged facing each other, the transmission / reception means, the antenna, the reflection plate, and the angle variable means are arranged in almost one line, and the distance from the transmission / reception means to the angle variable means is increased. become longer.
- iron ore 7a and coke 7b are usually alternately loaded from the top of the furnace by a large bell 8 (bell type charging device) or a shooter (see FIG. 1: reference numeral 10).
- the deposits 7 are deposited in such a manner that the deposition profile of these charges 7 is in the shape of an inverted bell like an ant hell.
- One of the important factors for stable operation of the blast furnace is the distribution of gas flow in the furnace.
- This gas flow distribution is closely related to the iron ore and coke deposits, and usually the deposition state where the gas flow distribution is optimal by experiment, that is, the angle of the slope of the deposit, the iron ore
- a theoretical deposition profile that optimizes the layer thickness ratio between the deposition layer and the coke deposition layer is obtained, and the operation of the large bell and the shooter is controlled so that the actual deposition state matches the theoretical deposition profile.
- the measurement is performed every time the iron ore 7a and the coke 7b have a predetermined thickness according to the theoretical deposition profile, and the thicknesses of the respective deposited layers of the iron ore 7a and the coke 7b are measured.
- the movement range (inclination angle) of the movable armor 9 is controlled so that the length does not change with each charging.
- a method of charging and depositing the iron ore 7a and the coke 7b in the furnace by turning the shooter is also known. Even in the system using this shooter, a microwave measuring device can be mounted near the top of the furnace, and the deposition profile can be measured by scanning the deposition surface of the iron ore 7a and coke 7b with microwaves. In the conventional microwave measuring apparatus including the method, it takes time to scan the deposition surface, and there is room for improvement in the measurement frequency.
- the deposition profile of iron ore 7a and coke 7b can be measured over the entire surface of the furnace, a more accurate charging operation can be performed.
- the reflection plate is attached to the support member so as to be rotatable about the support shafts provided at both ends, and the support member The rod-shaped piece attached to the back surface of the reflecting plate is moved linearly so as to be orthogonal to the support shaft, thereby two-dimensionally tilting the reflecting surface toward the furnace. It is also proposed to change the configuration.
- the present invention reduces the size of the apparatus, simplifies the rotating mechanism of the reflector plate even when scanning the surface of the charged object on the surface, and makes it possible to perform control more accurately, and further to perform measurement.
- the purpose is to perform the optimum blast furnace operation by making the actual deposition profile closer to the theoretical deposition profile by measuring the deposition profile of iron ore and coke at each shooter turn or every predetermined turn by performing it quickly. .
- the present invention provides a method for charging and depositing a charge in a blast furnace, a surface detection device for the charge, and a method for operating the blast furnace as described below.
- a reflector disposed immediately above the opening provided near the top of the blast furnace and having a reflecting surface inclined toward the opening, an antenna disposed opposite to the reflecting surface of the reflecting plate, an antenna, And a waveguide for connecting the detection wave transmitting / receiving means, and the detection wave from the antenna is reflected by the reflecting surface of the reflector and is incident on the furnace through the opening, and is reflected by the charge in the furnace.
- a waveguide rotation means for rotating the waveguide at a predetermined angle about the axis of the waveguide; Detecting the surface of a blast furnace interior, wherein the antenna and the reflector are connected by a connecting member, and the reflector is rotated about the axis of the waveguide as the antenna is rotated by the waveguide rotating means. apparatus.
- a reflecting plate rotating means for tilting the reflecting surface to the antenna side and the non-antenna side at a predetermined angle is provided, and the detection wave is scanned two-dimensionally by the reflecting plate rotating means and the waveguide rotating means.
- the apparatus for detecting a surface of a blast furnace interior entry according to the above (1) wherein: (3) The blast furnace interior entrance according to (2), wherein the reflecting plate rotating means is installed on the axis of the waveguide on the back surface of the reflecting plate and rotates integrally with the waveguide. Surface detection device.
- the supporting shaft is attached to both ends of the diameter of the reflecting plate, and the reflecting plate is rotatably supported around the supporting shaft by the supporting member extending from the connecting member.
- a reflecting plate rotating means is a piston rod that linearly moves to the antenna side or the non-antenna side along the waveguide axis, one end is attached to the tip of the piston rod, and the other end is on the back surface of the reflecting plate. And a rod-shaped member attached to be shifted upward or downward from the center of rotation, and the piston rod moves the attachment portion between the other end of the rod-shaped member and the back surface of the reflector toward the antenna side or the non-antenna side.
- the apparatus for detecting a surface of a blast furnace interior according to the above (2) or (3).
- any one of the above (1) to (4), wherein the antenna is a horn antenna, and the reflecting surface of the reflector is a concave surface convexly curved on the opposite side of the antenna surface of the antenna The surface detection apparatus for blast furnace interior entry according to item 1.
- a method of charging and depositing iron ore, coke and other charges into the blast furnace with a shooter While having the surface detection apparatus according to any one of (1) to (10) above, The transmission / reception operation of scanning the surface of the charged object with the detection wave is completed within one or a predetermined number of turns of the shooter, A method for charging and depositing a charge in a blast furnace, characterized in that the charge is charged while measuring the surface profile of the charge during the turning of the shooter or every predetermined turn. (12) Obtain a deposit profile of the charge based on the surface profile, compare it with the previously determined theoretical deposition profile, and control the shooter to correct the error from the theoretical deposition profile and load a new charge.
- a method for charging and depositing a charge into a blast furnace as described in (11) above, wherein (13) A method for operating a blast furnace, comprising charging a charge into a blast furnace according to the method described in (11) or (12), depositing the material, and operating the blast furnace.
- the angle changing means for the reflecting plate is not required, and the entire length can be shortened by the amount of the angle changing means to save space.
- the rotating mechanism and control of the reflector can be simplified.
- FIG. 3 It is a figure which shows the whole structure of the measuring apparatus for enforcing the charging and deposition method of the charging material which concerns on this invention. It is a figure for demonstrating the deposition profile of an iron ore, It is a figure which shows the other example of a measuring apparatus. It is a figure which shows the further another example of a measuring apparatus. It is sectional drawing seen from the arrow A direction of FIG. 3 or FIG. It is a figure which shows an example of the measuring apparatus which can scan the surface of an insert in planar shape. It is the figure which looked at the surrounding structure of the reflecting plate of the measuring apparatus shown in FIG. It is a figure for demonstrating the scanning mode in the case of scanning the surface of an insert in planar shape.
- FIG. 1 is a view showing a device configuration for carrying out the method of the present invention, and shows a cross section of a blast furnace according to FIG.
- a shooter 10 for charging iron ore 7a and coke 7b is disposed at the top of the blast furnace 6, and the shooter 10 is turned in a horizontal direction as indicated by an arrow R and as indicated by an arrow V. Then, iron ore 7a and coke 7b are charged into a predetermined position in the furnace from the dropping port 11 by a motion combined with the pendulum motion.
- a measuring device 100 for measuring the deposition profile of the charge 7 is installed near the top of the furnace, for example, outside the furnace on the side of the shooter 10.
- an antenna 111 connected to a detection wave transmission / reception unit 110 through a waveguide 112 and a metal reflection plate 120 are arranged to face each other, and a reflection surface 120 a of the reflection plate 120 is provided in the blast furnace 6. It is inclined 45 ° downward so as to face the opening 6a.
- a microwave or a millimeter wave that is not easily affected by heat or water vapor in the furnace is used.
- the connecting member 115 is a cylindrical body, one end of which is fixed to a flange portion 111a formed on the periphery of the opening of the antenna 111, and the other end of the reflecting surface 120a of the reflecting plate 120, for example, as shown in the figure. An upper end portion 121 is attached. Since the antenna 111 and the reflection plate 120 are connected by the connecting member 115 at the shortest distance, there is no leakage of the detection wave reaching the reflection plate 120 from the antenna 111, and the oscillation power of the detection wave can be used effectively and leaked. Since there is no unnecessary reflection due to the detection wave, and this unnecessary reflection and the reflection from the iron ore 7a and coke 7b do not interfere with each other, the measurement accuracy is improved and the reliability is improved.
- a waveguide 112 is attached to the antenna 111. As shown by an arrow X in the drawing, the waveguide 112 is rotated clockwise or counterclockwise around the axis of the waveguide 112. Make it movable. In order to rotate, the motor-side gear 131 is rotated by the motor 130, and the rotation is transmitted to the waveguide-side gear 132 attached to the waveguide 112.
- a transmission / reception unit 110 is connected to the waveguide 112, and the transmission / reception unit 110 also rotates as the waveguide 112 rotates.
- the waveguide 112 and the transmission / reception unit 110 are coupled to each other by a coupler 135 or the like. Therefore, it is possible to rotate only the waveguide 112 while the transmission / reception means 110 remains fixed.
- the detection wave from the transmitting / receiving means 110 is transmitted from the antenna 111, reflected by the reflecting surface 120a of the reflecting plate 120, and then into the blast furnace 6 through the opening 6a. And proceed. Then, as indicated by R in the figure, after being reflected by the iron ore 7a or coke 7b accumulated in the furnace, it is received by the transmission / reception means 110 via the same path. At that time, by rotating the waveguide 112 by the motor 130, the reflector 120 is rotated together with the antenna 111, and the detection wave is swung in a direction perpendicular to the paper surface. As a result, the iron ore 7a of the blast furnace 6 or The surface of the coke 7b is scanned linearly, and the deposition profile of the iron ore 7a and the coke 7b can be known based on the distance information.
- the reflector 120 is arranged orthogonal to the paper surface as shown in FIG. 1, but the entire measuring apparatus 100 is rotated 90 ° toward the front. In this case, the detection wave is swung in the left-right direction on the paper surface.
- the change in the reflection angle by the reflection surface 120a of the reflection plate 120 can be performed only by rotating the waveguide 112 by a predetermined angle by the motor 130.
- the operation can be performed much more rapidly.
- the measurement can be completed while the shooter 10 makes one turn.
- the turning speed of the shooter 10 is about 8 rpm, and the time required for one turning is about 7.5 seconds.
- the measuring apparatus 100 can sufficiently cope with the measurement in such a short time. Therefore, the deposition profile of the iron ore 7a or coke 7b can be measured for each turn of the shooter 10, and even if there is an error from the theoretical deposition profile determined in advance, it is quick and accurate at the time of new charging. Can be corrected.
- FIG. 2 is a partially enlarged view of FIG. 1 and will be described by illustrating the deposition of iron ore 7a.
- the deposition profile of the iron ore 7a deposited in advance is P0
- the shooter 10 is turned at the rotation angle ⁇ 1 in the V direction
- a new iron ore 7a is rotated on the deposition profile P0 by the rotation angle of the shooter 10.
- the deposition is started from a position corresponding to ⁇ 1, and the deposition profile at this time is measured by the measuring apparatus 100 to obtain the deposition profile P1.
- a new iron ore 7a is deposited on the deposition profile P1 starting from a position corresponding to the rotation angle ⁇ 2 of the shooter 10.
- the current deposition profile is measured by the measuring device 100 to obtain the deposition profile P2.
- a deposition profile Pn of the iron ore 7a is finally obtained.
- the actual turning mode (rotation angle in the V direction) of the shooter 10 can be controlled while comparing with the theoretical deposition profile for each turn of the shooter 10.
- the deposition profile can be measured for each turn of the shooter 10.
- the deposition profile was measured after iron ore 7a or coke 7b was deposited to a certain extent, it was difficult to correct it with a new charge to match the theoretical deposition profile. According to the present invention, since the deposition profile can be measured during the turning of the shooter 10 or for every small amount of deposition accompanying one turning, it becomes easy to match the theoretical deposition profile.
- the theoretical value of the ratio between the thickness of the iron ore 7a and the thickness of the coke 7b has been determined. As described above, a fine deposition profile can be measured for each turn of the shooter 10. As a result, the thick coke 7b is not deposited and the amount of coke 7b used can be reduced.
- the shooter 10 since the shooter 10 is a cylindrical body, the probability that the detection wave from the measuring device 100 hits the shooter 10 is low, and there is substantially no trouble in measurement. Even if it hits the detected wave, it is instantaneous, and since the shooter 10 is located on the furnace top side with respect to the iron ore 7a and coke 7b, the detected reflected wave R appears at a specific position and has a deposition profile. Can be distinguished. Alternatively, the detection pattern when the shooter 10 is turned may be measured and processed so as to be removed from the deposition profile.
- the deposition profile may be measured for each turn of the shooter 10.
- the FMCW method is generally used for signal processing, but this FMCW method is composed of a sweep period and a signal processing period.
- the sweep period the frequency of the oscillator of the transmission / reception means 110 is swept, and a beat signal is transmitted during the sweep period.
- Sampling is performed to obtain sampling data, and the sampling data is subjected to FET processing during a signal processing period to obtain a frequency at which the frequency spectrum of the beat signal is maximized, and the frequency is converted into a distance to obtain a measured distance value. Therefore, since processing time is required when the sweep period and the signal processing period are sequentially processed, it is preferable to shorten the time by adopting a toggle buffer as a buffer that performs interrupt processing to control the sweep period and takes sampling data.
- the theoretical deposition profile can experimentally determine the deposition state in which the distribution of gas flow in the furnace is optimum as in the conventional case.
- the above is for the purpose of controlling the shooter 10 so as to match the theoretical deposition profile and charging and depositing iron ore 7a and coke 7b.
- the iron ore 7a and the coke 7b may slide down from the inclined surface. This is mainly because the properties of the iron ore 7a and coke 7b assumed when producing the theoretical deposition profile are different from the properties of the iron ore 7a and coke 7b actually charged. Possible reason.
- the deposition state is immediately determined. Can be detected and fed back to the theoretical deposition profile. Thus, according to the present invention, it is also possible to verify the theoretical deposition profile.
- the measuring apparatus 100 can be variously changed.
- a horn antenna is used as the antenna 111.
- the horn antenna generally has a total horn length of about 1600 mm in order to improve directivity. Therefore, as shown in FIG. 3, the horn length of the horn antenna is shortened to about 200 mm by making the reflecting surface 120a of the reflecting plate 120 a concave surface that is convexly curved on the opposite side of the antenna surface of the antenna 111. can do.
- the horn opening shape of the horn antenna may be round or square.
- the antenna 111 may be a horn antenna with a lens.
- the lens 113 is a semi-convex body made of a dielectric such as ceramics, glass, or fluororesin, and can converge and transmit millimeter waves from the horn antenna.
- the reflecting surface 120a of the reflecting plate 120 is made flat. Even with such a configuration, the horn length of the horn antenna can be similarly reduced.
- a parabolic antenna can be used as the antenna 111.
- the lens 113 is not provided and the reflection surface 120a of the reflection plate 120 is also flat.
- the opening of the connecting member 115 is covered with a breathable filter 140 made of a material that transmits the detection wave.
- a breathable filter 140 for example, a woven fabric made of “Tyranno fiber” manufactured by Ube Industries, Ltd. can be used.
- the Tyranno fiber is a ceramic fiber made of silicon, titanium, zirconium, carbon, and oxygen, and the one knitted into a planar shape becomes a heat-resistant ventilation material.
- a heat-resistant air-impermeable partition wall 145 made of a material that does not transmit a gas such as air or a solid such as dust but transmits a detection wave is disposed at an appropriate position between the filter 140 of the connecting member 115 and the antenna 111. And a space between the filter 140 and the antenna 111 may be partitioned.
- This non-breathable partition wall 145 may be a ceramic board, for example. The non-breathable partition wall 145 can block heat from the blast furnace 6.
- the reflector 120, the filter 140, the air-impermeable partition 145, and the antenna 111 are accommodated in the pressure vessel 150, and a high-pressure inert gas (for example, nitrogen gas) is supplied to the pressure vessel 150 through the gas supply port 151.
- a high-pressure inert gas for example, nitrogen gas
- the connecting member 115 is formed with a plurality of air holes 116 that are inclined toward the filter, and the gas supply port 151 is provided in the vicinity immediately above the connecting member 115.
- the dust from the inside of the furnace ejected toward the filter and attached to the filter 140 can be removed. Further, since the inert gas passes through the filter 140 and reaches the reflecting surface 120a of the reflecting plate 120, dust attached to the reflecting surface 120a can be removed.
- the vent hole 116 of the connecting member 115 is not in the vicinity of the gas supply port 151, the inert gas from the gas supply port 151 is supplied to the gap between the pressure-resistant vessel 150 and the connecting member 115. It is possible to prevent the dust from entering the dust or to remove the dust that has entered the gap.
- the connecting member 115 rotates, the flow of the inert gas is also changed by repeatedly reaching the gas supply port 151 or being separated from the gas supply port 151, thereby changing the flow of the inert gas. 115 also vibrates, and the vibration is also transmitted to the filter 140. The dust adhering to the filter 140 is also removed by this vibration. Furthermore, each time the reflector 120 rotates in the forward and reverse directions, the motor side gear 131 and the waveguide side gear 132 are switched in opposite directions, so that the vibration at that time is connected to the antenna 111 through the waveguide 112. The dust that is transmitted to the member 115 and further to the filter 140 and adheres to the filter 140 is shaken off by vibration.
- the heat from the blast furnace 6 is cut off by the non-breathable partition wall 145.
- the connecting portion between the antenna 111 and the waveguide 112 or the transmission / reception of the waveguide 112 is performed. You may insert the plug member 160 which consists of material which permeate
- a window is provided by opening a portion directly above the reflection plate 120 and the filter 140 of the pressure vessel 150, and when not measuring, the waveguide 112 and the reflection plate 120 are rotated 180 °.
- the reflective surface 120a and the filter 140 face the window, it is possible to observe the dust adhesion state of the reflective surface 120a and the filter 140.
- the reflective surface 120a and the filter 140 can remove dust adhering to inert gas or vibration, but the removal may be insufficient, and the dust adhesion state is observed through the window. If removal is necessary, the window can be opened for cleaning.
- the back surface of the reflection plate 120 (surface opposite to the reflection surface 120a) faces the opening 6a of the blast furnace 6. Therefore, even if iron ore or coke blown up from the blast furnace 6 comes into the apparatus through the opening 6a, it does not hit the back surface of the reflector 120 and destroy the filter 140.
- a gate valve may be provided between the opening 6a of the blast furnace 6 and the measuring device 100, for example, at the connecting portion 131 of the pressure vessel 150, and may be opened during measurement and closed during non-measurement.
- the detection wave is swayed in a direction perpendicular to the paper surface.
- the detection wave with the opening 6a of the pressure vessel 150 is not disturbed.
- the connecting portion 152 is formed in a sector shape that gradually increases in diameter toward the blast furnace side in accordance with the rotation angle ⁇ (the swing width) of the reflecting surface 120a of the reflecting plate 120.
- the above-described measuring apparatus 100 connects the antenna 111 and the reflection plate 120 and rotates them in the same direction, microwaves and millimeter waves are linearly shaken and sent and received in the blast furnace. That is, microwaves and millimeter waves are scanned linearly in a direction perpendicular to the paper surface, and a linear surface profile is obtained. As described above, if the surface profile can be measured over the entire surface of the furnace, a more accurate charging operation can be performed. Therefore, in the measuring apparatus 100 described above, the reflector 120 is rotated by the waveguide 112. In addition to the direction X, the inclination angle of the reflecting surface 120a to the furnace inside is changed.
- FIG. 6 and 7 are examples of such a measuring device.
- pin-shaped support shafts are provided at both ends of the diameter of the reflector 120.
- FIG. 121 and 121 are provided so as to protrude, and the support shafts 121 and 121 are supported by two support members 117 and 117 extending from the connecting member 115 so as to be in the same horizontal position as the axis of the waveguide 112. . Therefore, the reflection plate 120 is supported so as to be rotatable in the direction of arrow Y about the support shafts 121 and 121, and the waveguide circuit is similarly connected to the reflection plate 120 via the connecting member 115 and the support members 117 and 117. It is rotated in the same direction (arrow X direction) as the antenna 111 by the moving means.
- a mounting piece 122 is provided on the rear surface of the reflecting plate 120 at a position higher than the support shafts 121 and 121 at a horizontal position, and a rod-shaped member 127 connected to the tip of the piston rod 126 of the cylinder 125 is connected. Yes.
- the attachment piece 122 is provided above the support shaft 121 in the figure, but may be provided below the support shaft 121. Then, by driving the cylinder 125, the piston rod 126 moves forward (moves to the right in the figure) or moves backward (moves to the left in the figure) as indicated by the arrow F, and when the piston rod 126 moves forward, it interlocks with the rod-shaped member 127.
- the attachment piece 122 also moves to the antenna side, and accordingly, the reflecting plate 120 is inclined so that the reflecting surface 120a faces the blast furnace side.
- the piston rod 126 moves backward, the attachment piece 122 is moved to the side opposite to the antenna, and accordingly, the reflecting plate 120 is inclined so that the reflecting surface 120a faces the antenna side.
- the reflecting plate 120 can be rotated about the support shafts 121 and 121 in the arrow Y direction by driving the cylinder 125. Thereby, the microwave or millimeter wave is shaken in the horizontal direction in the figure as indicated by M (R) and sent into the furnace.
- the rotation in the X direction is performed by the motor 130 and the gears 131 and 132 that rotate the waveguide 112
- the rotation in the Y direction is performed by the cylinder 125.
- the control of the inclination of 120 in the X direction and the Y direction can be performed simply as compared with the case where the single device is used, and it is possible to easily cope with further shortening of the time required for scanning.
- a gas supply port 151a is provided in the vicinity of the upper end of the reflecting plate 120, and from there, a high-pressure inert gas (for example, nitrogen) Gas).
- a high-pressure inert gas for example, nitrogen
- the inert gas is blown through the filter 140, but here, since the reflector 120 is separated from the filter 140, the inert gas from the filter 140 is not allowed to flow. Since it does not reach the reflecting surface 120a sufficiently, the gas supply port 151a is provided close to the reflecting plate 120, and the inert gas is blown directly onto the reflecting surface 120a.
- the opening 6a is wide and the piston rod 126 and the rod-shaped member 127 are exposed, the iron ore 7a and coke 7b blown up from the furnace directly collide with them. Therefore, a metal cover 170 that follows the entire back surface of the reflecting plate 120 is attached, and while not being measured, the cover 170 is rotated 180 ° together with the antenna 111 and the reflecting plate 120 to move the cover 170 to the opening side, and the piston rod 126. It is preferable to prevent the rod-shaped member 127 and the reflector 120 from colliding with the iron ore 7a and coke 7b from the inside of the furnace, and to prevent dust from entering. Or although illustration is abbreviate
- a partition wall 145 may be installed, or a simple horn antenna as shown in FIG. 3 may be used instead of the lens-equipped horn antenna, and the reflecting surface 120a may be curved.
- the microwave or millimeter wave is scanned two-dimensionally, instead of the connection portion 152 shown in FIG. A pyramid shape or a conical shape whose opening diameter gradually increases.
- FIG. 8 is a schematic view of scanning the inside of the furnace on the surface using the measuring apparatus 100 that rotates the reflector 120 also in the Y direction
- FIG. 9 is an example showing the result.
- the distribution of the distance to the charge is obtained three-dimensionally (planar distribution and depth distribution) by rotating the reflector 120 in the X and Y directions.
- the X-axis value in the figure is the rotation angle of the reflector 120 in the X direction
- the Y-axis value is the rotation angle of the reflector 120 in the Y direction
- each plot is in the X direction. It shows the distance to the charge surface when it is turned at a certain angle and turned at a certain angle in the Y direction.
- the plot P shows the distance to the insert obtained when the reflector 120 is rotated by ⁇ 24 ° in the X direction and ⁇ 20 ° in the Y direction and microwaves or millimeter waves are transmitted into the furnace.
- information on the reflection position and the depth at that position can be obtained.
- such a plot can be obtained continuously in the X and Y directions, and the surface profile of the charge can be obtained three-dimensionally. A profile that makes it easy to see the circumferential balance can be created.
- the measurement range in the X direction and the Y direction can be extended by increasing the rotation angle of the reflecting plate 120 in the X direction and the Y direction.
- the line-shaped profiles corresponding to six different angles above and below 0 ° in the Y direction are all the same when the circumference is balanced. Therefore, when there is a difference between these profiles, it can be determined that the circumferential balance is not achieved, and for example, an abnormality alarm can be issued. Further, a profile (line L) at 0 ° in the Y direction is set as a “reference profile”, and it can be determined that there is an abnormality when a different profile appears.
- FIG. 11 is a schematic diagram showing the results.
- the circumferential balance is achieved, all the profiles are the same, but when there is a difference between these profiles, an abnormal alarm can be issued.
- the charge is deposited so as to gradually become deeper toward the center of the furnace, and ideally, the inclination of each part is the same.
- the turning speed of the shooter 10 is adjusted so that the inclination in each part is the same.
- the supply amount of iron ore 7a or coke 7b is adjusted by changing it.
- the surface profile is simply obtained in a linear shape, and cannot be compared with the inclination of other lines obtained when the surface profile is rotated in the Y direction.
- iron ore 7a and coke 7b can be deposited closer to the theoretical profile, and the blast furnace can be operated in a better state. .
- the amount of coke supplied into the furnace can be minimized and the consumption can be reduced as compared with the conventional case. Can be reduced.
- a detection wave that is a rotation wave whose electric field rotates in one direction clockwise or counterclockwise.
- the detection wave reflected on the surface of the iron ore 7a and the coke 7b may be reflected on the wall surface 60 of the opening 6a of the blast furnace 6 (R '), which hinders accurate measurement. Since the rotation wave has a property that the rotation direction is reversed by reflection, the detection wave (R) reflected only on the surface of the iron ore or coke C and the detection wave (R) further reflected by the wall surface 60 of the opening 6a. ') And the number of reflections are different, so that the received detection wave can be distinguished by the rotation direction of the electric field.
- a clockwise rotation wave when transmitted, it is reflected by the reflecting plate 120 and becomes a counterclockwise rotation wave and enters the iron ore 7a and the coke 7b.
- the reflected wave becomes a clockwise rotation wave and is reflected. Reflected by the plate 120 and received as a counterclockwise rotation wave.
- the clockwise rotation wave reflected on the surface of the iron ore 7a or the coke 7b is reflected counterclockwise when reflected on the wall 60 of the opening 6a.
- a rotating wave is reflected and reflected by the reflecting plate 120 and received as a clockwise rotating wave. Therefore, by receiving only the counterclockwise rotation wave, the rotation wave (R ′) reflected by the wall surface 60 of the opening 6a can be eliminated, and an accurate measurement can be realized.
- the present invention is capable of accurately and quickly measuring the surface profile of iron ore and course deposited and inserted in a blast furnace, and enables better blast furnace operation.
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Abstract
Description
(1)高炉の炉頂近傍に設けた開口部の直上に配設され、反射面が開口部側に向けて傾斜した反射板と、反射板の反射面と対向配置されるアンテナと、アンテナと検出波送受信手段とを連結する導波管とを備え、アンテナからの検出波を反射板の反射面で反射して開口部を通じて炉内に入射させ、炉内の装入物で反射された検出波を、開口部を通じて反射板の反射面に入射させてアンテナに送り、検出波送受信手段で検波して装入物の表面までの距離や表面プロフィールを検出する装置において、
導波管を、該導波管の軸線を中心に所定角度で回動させる導波管回動手段を備え、
アンテナと反射板とを連結部材により連結し、導波管回動手段によるアンテナの回動とともに反射板を導波管の軸線を中心に回動させることを特徴とする高炉内装入物の表面検出装置。
(2)反射面を所定の角度でアンテナ側及び反アンテナ側に傾斜させる反射板回動手段を備え、反射板回動手段と導波管回動手段とにより検出波を2次元的に走査することを特徴とする上記(1)記載の高炉内装入物の表面検出装置。
(3)反射板回動手段が、反射板の裏面において、導波管の軸線上に設置され、導波管と一体に回動することを特徴とする上記(2)記載の高炉内装入物の表面検出装置。
(4)反射板の直径両端に支軸が取り付けられ、連結部材から延出する支持部材に支軸を中心に反射板が回動自在に支持されているとともに、
反射板回動手段が、導波管の軸線に沿ってアンテナ側または反アンテナ側に直線移動するピストンロッドと、一端がピストンロッドの先端に取り付けられ、他端が反射板の裏面に、反射板の回転中心の上方または下方にずらして取り付けられた棒状部材とを備えるとともに、ピストンロッドにより、棒状部材の他端と反射板の裏面との取り付け部分をアンテナ側または反アンテナ側に向かって移動させることを特徴とする上記(2)または(3)記載の高炉内装入物の表面検出装置。
(5)アンテナがホーンアンテナであり、反射板の反射面が、アンテナのアンテナ面とは反対側に凸状に湾曲した凹面であることを特徴とする上記(1)~(4)の何れか1項に記載の高炉内装入物の表面検出装置。
(6)アンテナがレンズ付ホーンアンテナであり、反射板の反射面が平面であることを特徴とする上記(1)~(4)の何れか1項に記載の高炉内装入物の表面検出装置。
(7)アンテナの開口を耐熱材料からなる非通気性の隔壁で覆うことを特徴とする上記(1)~(6)の何れか1項に記載の高炉内装入物の表面検出装置。
(8)非通気性の隔壁の反射板側の前面に耐熱材料からなるフィルタが配置されていることを特徴とする上記(7)記載の高炉内装入物の表面検出装置。
(9)反射板の反射面に不活性ガスを吹き付けることを特徴とする上記(1)~(8)の何れか1項に記載の高炉内装入物の表面検出装置。
(10)非測定時に、導波管とともに反射板を180°回動し、反射板の裏面を高炉の開口部と対向させることを特徴とする上記(1)~(9)の何れか1項に記載の高炉内装入物の表面検出装置。
(11)シュータにより、鉄鉱石やコークス等の装入物を高炉の内部に装入し、堆積させる方法であって、
上記(1)~(10)の何れか1項に記載の表面検出装置を備えるとともに、
検出波により装入物の表面を走査する送受信作業を、シュータの1旋回内もしくは所定旋回回数内に完了し、
シュータの旋回中または所定旋回毎に、装入物の表面プロフィールを測定しながら装入物を装入することを特徴とする高炉内への装入物の装入及び堆積方法。
(12)表面プロフィールを基に装入物の堆積プロフィールを求め、予め求めた理論堆積プロフィールと比較し、理論堆積プロフィールからの誤差を修正するようにシュータを制御して新たな装入物を装入することを特徴とする上記(11)記載の高炉への装入物の装入及び堆積方法。
(13)上記(11)または(12)に記載の方法により高炉内に装入物を装入し、堆積させて高炉を操業することを特徴とする高炉の操業方法。
本出願は、2014年3月4日出願の日本特許出願(特願2014-41909)及び2014年7月24日出願の日本特許出願(特願2014-150765)に基づくものであり、その内容はここに参照として取り込まれる。
7a 鉄鉱石
7b コークス
10 シュータ
100 測定装置
110 送受信手段
111 アンテナ
112 導波管
115 連結部材
117 支持部材
120 反射板
121 支軸
122 取付片
125 シリンダ
126 ピストンロッド
127 棒状部材
130 モータ
131 モータ側ギア
132 導波管側ギア
140 フィルタ
145 非通気性隔壁
150 耐圧容器
151、151a ガス供給口
152 連結部
170 カバー
Claims (13)
- 高炉の炉頂近傍に設けた開口部の直上に配設され、反射面が開口部側に向けて傾斜した反射板と、反射板の反射面と対向配置されるアンテナと、アンテナと検出波送受信手段とを連結する導波管とを備え、アンテナからの検出波を反射板の反射面で反射して開口部を通じて炉内に入射させ、炉内の装入物で反射された検出波を、開口部を通じて反射板の反射面に入射させてアンテナに送り、検出波送受信手段で検波して装入物の表面までの距離や表面プロフィールを検出する装置において、
導波管を、該導波管の軸線を中心に所定角度で回動させる導波管回動手段を備え、
アンテナと反射板とを連結部材により連結し、導波管回動手段によるアンテナの回動とともに反射板を導波管の軸線を中心に回動させることを特徴とする高炉内装入物の表面検出装置。 - 反射面を所定の角度でアンテナ側及び反アンテナ側に傾斜させる反射板回動手段を備え、反射板回動手段と導波管回動手段とにより検出波を2次元的に走査することを特徴とする請求項1記載の高炉内装入物の表面検出装置。
- 反射板回動手段が、反射板の裏面において、導波管の軸線上に設置され、導波管と一体に回動することを特徴とする請求項2記載の高炉内装入物の表面検出装置。
- 反射板の直径両端に支軸が取り付けられ、連結部材から延出する支持部材に支軸を中心に反射板が回動自在に支持されているとともに、
反射板回動手段が、導波管の軸線に沿ってアンテナ側または反アンテナ側に直線移動するピストンロッドと、一端がピストンロッドの先端に取り付けられ、他端が反射板の裏面に、反射板の回転中心の上方または下方にずらして取り付けられた棒状部材とを備えるとともに、ピストンロッドにより、棒状部材の他端と反射板の裏面との取り付け部分をアンテナ側または反アンテナ側に向かって移動させることを特徴とする請求項2または3記載の高炉内装入物の表面検出装置。 - アンテナがホーンアンテナであり、反射板の反射面が、アンテナのアンテナ面とは反対側に凸状に湾曲した凹面であることを特徴とする請求項1~4の何れか1項に記載の高炉内装入物の表面検出装置。
- アンテナがレンズ付ホーンアンテナであり、反射板の反射面が平面であることを特徴とする請求項1~4の何れか1項に記載の高炉内装入物の表面検出装置。
- アンテナの開口を耐熱材料からなる非通気性の隔壁で覆うことを特徴とする請求項1~6の何れか1項に記載の高炉内装入物の表面検出装置。
- 非通気性の隔壁の反射板側の前面に耐熱材料からなるフィルタが配置されていることを特徴とする請求項7記載の高炉内装入物の表面検出装置。
- 反射板の反射面に不活性ガスを吹き付けることを特徴とする請求項1~8の何れか1項に記載の高炉内装入物の表面検出装置。
- 非測定時に、導波管とともに反射板を180°回動し、反射板の裏面を高炉の開口部と対向させることを特徴とする請求項1~9の何れか1項に記載の高炉内装入物の表面検出装置。
- シュータにより、鉄鉱石やコークス等の装入物を高炉の内部に装入し、堆積させる方法であって、
請求項1~10の何れか1項に記載の表面検出装置を備えるとともに、
検出波により装入物の表面を走査する送受信作業を、シュータの1旋回内もしくは所定旋回回数内に完了し、
シュータの旋回中または所定旋回毎に、装入物の表面プロフィールを測定しながら装入物を装入することを特徴とする高炉内への装入物の装入及び堆積方法。 - 表面プロフィールを基に装入物の堆積プロフィールを求め、予め求めた理論堆積プロフィールと比較し、理論堆積プロフィールからの誤差を修正するようにシュータを制御して新たな装入物を装入することを特徴とする請求項11記載の高炉への装入物の装入及び堆積方法。
- 請求項11または12に記載の方法により高炉内に装入物を装入し、堆積させて高炉を操業することを特徴とする高炉の操業方法。
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