WO2017022818A1 - Dispositif de détection de surface et procédé de chargement d'un matériau chargé dans un haut fourneau et procédé de fonctionnement d'un haut fourneau - Google Patents

Dispositif de détection de surface et procédé de chargement d'un matériau chargé dans un haut fourneau et procédé de fonctionnement d'un haut fourneau Download PDF

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Publication number
WO2017022818A1
WO2017022818A1 PCT/JP2016/072905 JP2016072905W WO2017022818A1 WO 2017022818 A1 WO2017022818 A1 WO 2017022818A1 JP 2016072905 W JP2016072905 W JP 2016072905W WO 2017022818 A1 WO2017022818 A1 WO 2017022818A1
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WIPO (PCT)
Prior art keywords
charge
blast furnace
charging
reflector
antenna
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PCT/JP2016/072905
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English (en)
Japanese (ja)
Inventor
早衛 萱野
昭彦 脇本
Original Assignee
株式会社ワイヤーデバイス
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.)
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Priority claimed from JP2015154230A external-priority patent/JP6533938B2/ja
Priority claimed from JP2015172030A external-priority patent/JP6595265B2/ja
Priority claimed from JP2016010799A external-priority patent/JP2017128783A/ja
Priority claimed from JP2016033340A external-priority patent/JP2017150035A/ja
Application filed by 株式会社ワイヤーデバイス filed Critical 株式会社ワイヤーデバイス
Publication of WO2017022818A1 publication Critical patent/WO2017022818A1/fr

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    • 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
    • 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
    • G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
    • G01N22/00—Investigating or analysing materials by the use of microwaves or radio waves, i.e. electromagnetic waves with a wavelength of one millimetre or more

Definitions

  • the present invention transmits detection waves such as microwaves and millimeter waves into the blast furnace, receives detection waves reflected by iron ore and coke charged in the furnace, and detects the surface profile of the charge. It is related with the apparatus to do.
  • the present invention also relates to a technique for controlling the deposition profile of iron ore and coke charged in a blast furnace.
  • a detection wave is transmitted to the surface of the iron ore and coke (transmitted wave), and the detection wave reflected by the iron ore and coke. (Reflected wave) is received, 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 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 passed through the antenna 2 near the tip opening of the lance 1 inserted into the blast furnace 6. Transmitting toward the charge 7 (iron ore 7a or coke 7b), receiving the microwave reflected by the surface of the charge 7 by the antenna 2, detecting it by the microwave transmitting / receiving means 3, and transmitting and receiving The distance to the surface of the charge 7 is obtained from the time difference between. At this time, the deposition profile of the charge 7 is obtained by reciprocating the lance 1 from the furnace wall 5 toward the axis 4 of the blast furnace 6.
  • the accumulation state of the charge 7 is in the shape of a reverse bell that is deepest on the axis 4 of the blast furnace 6 and gradually becomes shallower toward the furnace wall 5.
  • the surface profile of the charge 7 can be detected linearly (two-dimensionally).
  • the detection device of Patent Document 1 since the detection device of Patent Document 1 only moves the lance 1 in parallel, the surface profile of the charge 7 can be detected only in a linear shape. Further, the lance 1 is a long object about the radius of the furnace and hangs down by its own weight and cannot be removed from the furnace, or a long stroke for movement requires a large space outside the furnace. Furthermore, a drive unit for moving the lance 1 is also required.
  • the reflector 120 is disposed immediately above the opening 6 a provided in the vicinity of the top of the blast furnace 6, and faces the reflector 120.
  • An antenna 111 is provided, a detection wave M from the transmission / reception means 110 is transmitted from the antenna 111, reflected by the reflector 120 and sent into the furnace, and the reflected wave reflected by the charge 7 in the furnace is reflected by the reflector.
  • the transmission wave is reflected by 120 and sent to the transmission / reception means 110, and the transmission plate is rotated by rotating the reflection plate 120 in two directions orthogonal to each other by a variable angle mechanism (not shown) attached to the reflection plate 120.
  • the surface detection apparatus 100 that scans the surface of the surface in a plane and detects the surface profile three-dimensionally is proposed.
  • the surface detection device 100 of Patent Document 2 can scan the surface of the charged object in a planar manner by rotating the reflecting plate 120 in two directions in the variable angle mechanism.
  • the surface detection device 100 is installed some distance away from the axis C of the blast furnace 6 in order to avoid the shooter 10 and the large bell (reference numeral 8 in FIG. 13 and reference numeral 8 in FIG. 21). . Therefore, as shown in the drawing, the detection wave M is transmitted obliquely from above to the charge 7, and when the surface of the charge 7 is viewed from the top of the furnace, as shown in FIGS. 23 (A) and (B). In addition, the detection wave M is scanned in an elliptical shape (dotted line) on the surface of the charge 7.
  • FIG. 6A a region A (shown by hatching) that is not scanned outside the ellipse is generated. If the entire surface of the charge 7 is to be scanned, as shown in FIG. 5B, the scanning range (shown by a dotted line) becomes wider in an elliptical shape than the charge 7, and the useless sampling area B ( (Indicated by hatching) occurs and the scan time is wasted.
  • an object of the present invention is to measure a surface profile by quickly scanning the surface of the charged material without waste in a surface detection device for detecting the surface profile of the charged material in a planar shape.
  • the present invention aims to provide a display method capable of more accurately recognizing the accumulation state of the charge.
  • the display method there is a high demand for grasping the descending speed or the amount of descending distribution.
  • the surface level of the charge gradually decreases with the operation of the blast furnace, but the lowering speed becomes faster on the furnace wall side than the center of the blast furnace. Since a core is formed at the center of the blast furnace, the amount of descent increases around the center so as to avoid the center. Such a phenomenon that the descent speed increases on the furnace wall side is likely to occur in a large blast furnace.
  • iron ore and coke are agglomerates of various sizes, they often do not descend uniformly in a plane shape, and there are locally a portion where the descending speed is slow and a portion where the descending speed is fast.
  • an object of the present invention is to obtain and display the descent speed or descent amount (descent speed or descent amount distribution) at each position on the surface of the charge.
  • dust iron ore pieces, coke pieces, and suspended matters
  • dust adheres to a reflecting plate and an antenna, and reduces receiving intensity.
  • measures are taken to prevent intrusion of dust by closing the opening at the time of non-measurement, installing filters, supplying inert gas into the device, etc., complete intrusion prevention cannot be performed.
  • Iron ore fragments, coke fragments, and dust generation vary depending on the type (composition) and size of the charged coke and iron ore, the amount charged, the temperature and pressure in the furnace, etc.
  • an object of the present invention is to enable accurate detection of dust adhesion even during operation of a blast furnace.
  • the present invention provides a surface detection device, a charging method, and a blast furnace operating method described below.
  • the detection wave from the transmission / reception means is transmitted into the furnace through the opening provided in the blast furnace, and the detection wave reflected from the surface of the charge in the furnace is transmitted to the transmission / reception means through the opening, thereby transmitting / receiving means.
  • the charge surface detection device for detecting the surface profile of the charge received at A reflector disposed directly above the opening of the blast furnace; An antenna facing the reflective surface of the reflector; Reflecting plate tilting means for tilting the reflecting surface of the reflecting plate at a predetermined angle toward the antenna side or the non-antenna side with the diameter of the reflecting surface as the rotation center; Reflecting plate rotating means for rotating the reflecting surface of the reflecting plate at a predetermined angle with the center point of the reflecting plate as a rotation center; A propagation part connected to the opening of the blast furnace and accommodating the reflector and the antenna facing each other; Display means for displaying the measured surface profile, The reflecting plate rotating means and the reflecting plate tilting means are interlocked to tilt and rotate the reflecting plate, and the surface of the charge is (A) Concentrically around the axis of the blast furnace, (b) Spirally around the axis of the blast furnace, or (c) The longest line centered on the longest line segment corresponding to the diameter of the charge Along the trajectory that is arranged so that the line segments that gradually become
  • An apparatus for detecting a surface of a charge characterized by scanning.
  • Reflector rotating means A waveguide having one end connected to the transmitting / receiving means and an antenna attached to the other end; A waveguide rotating means for rotating the waveguide at a predetermined angle about the axis of the waveguide; A connecting member that connects the antenna and the support shaft protruding from both ends of the diameter of the reflector; Consists of The apparatus for detecting a surface of a charge according to (1), wherein the reflector is rotated in the same direction as the waveguide is rotated.
  • the display means displays, for each insertion operation, all or part of the surface image indicating the surface of the charge and a cross-sectional image indicating a cross section at an arbitrary position on the surface of the charge.
  • the surface detection prime of the charge according to the above (1) or (2) which is characterized.
  • (4) In the surface image, the surface of the charge is divided into a plurality along the diameter, and a line segment corresponding to the straight line is displayed, In the cross-sectional image, the cross-sectional image along the line segment displayed on the surface image is displayed.
  • (5) The surface detection of the charge according to (3) or (4) above, wherein a plurality of surface images and a plurality of cross-sectional images are displayed based on the surface profile for a plurality of charging operations. apparatus. (6) Any one of the above (3) to (5), wherein when an abnormality is found in the charged material accumulation state, the abnormal part is extracted and displayed continuously for each charging operation.
  • the display means displays a surface image showing the distribution of the descent speed or amount of descent on the surface of the charge and a cross-sectional image showing the descent speed or amount of descent at an arbitrary position on the surface of the charge.
  • the apparatus for detecting a surface of a charge according to any one of (1) to (6) above.
  • the surface image the surface of the charge is divided into a plurality along the diameter, and a line segment corresponding to the diameter is displayed, In the cross-sectional image, a cross-sectional image along the sectioned diameter is displayed.
  • the charge surface detection apparatus according to any one of (1) to (9), further comprising a notification unit.
  • (11) A method of charging and depositing iron ore, coke and other charges into the blast furnace with a shooter, Using the surface detection device 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, The surface profile of the charge is measured during the turn of the shooter or at each predetermined turn, compared with the theoretical deposition profile determined in advance, and the shooter is controlled to correct the error from the theoretical deposition profile.
  • a method of charging a charge into a blast furnace characterized by charging the object.
  • (12) A method for operating a blast furnace, wherein the charge is charged into the blast furnace by the method described in (11), and the blast furnace is operated by being deposited.
  • the surface of the charge is scanned concentrically, spirally, or linearly, so that the entire surface of the charge can be scanned without excess or deficiency, and more rapid scanning is possible. Become. Therefore, the surface profile of the charge can be measured even during one rotation of the shooter, and the optimum blast furnace operation can be performed by controlling the charging means so as to match the theoretical deposition profile reflecting the measurement result.
  • the reflecting plate is rotated together with the antenna by the waveguide rotating means, and the inclination of the reflecting plate to the antenna side or the non-antenna side (opening side of the blast furnace) is another mechanism ( Reflector plate tilting means) and the apparatus configuration and control can be greatly simplified.
  • the amount of dust adhering to the reflector or antenna can be detected based on the attenuation of the received intensity from the time of installation, and the maintenance and parts replacement timing can be known accurately. Moreover, the attenuation of the received intensity can be detected even during operation of the blast furnace.
  • FIG. 1 It is sectional drawing which shows the surface detection apparatus of this invention. It is sectional drawing which shows the detail of the surface detection apparatus shown in FIG. It is a top view which shows the back surface side of a reflecting plate about the reflecting plate inclination means of the surface detection apparatus shown in FIG. 1 or FIG. It is a figure for demonstrating the 1st scanning method in the surface detection apparatus of this invention. It is a figure for demonstrating the method to obtain
  • FIG. 1 is a view showing a surface detection apparatus of the present invention, and is shown along a cross section of a blast furnace 6 according to FIG. 2 is a cross-sectional view showing details of the surface detection device shown in FIG. 1, and FIG. 3 is a top view showing a configuration of the back side of the reflector with respect to the reflector tilting means.
  • 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. Moreover, in order to avoid rotation of the shooter 10, the surface detection apparatus 100 for measuring the deposition profile of the charge 7 (iron ore 7a or coke 7b) was provided in the inclined part which continued from the furnace top to the side wall. It is connected to the opening 6a and installed outside the furnace.
  • the antenna 111 connected to the detection wave transmission / reception means 110 through the waveguide 112 and the reflection plate 120 are arranged to face each other, and the reflection surface 120 a of the reflection plate 120 is an opening of the blast furnace 6. It inclines below so that it may face 6a.
  • the antenna 111 and the reflection plate 120 are accommodated inside the propagation part 150 through which the detection wave propagates, and the connection part 152 of the propagation part 150 is attached to the opening 6 a of the blast furnace 6.
  • a microwave or a millimeter wave that is not easily affected by heat or water vapor in the furnace is used.
  • the waveguide 112 is rotatable clockwise or counterclockwise about the axis of the waveguide 112 as indicated by an arrow X in the drawing.
  • 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.
  • pin-shaped support shafts 121 and 121 are provided so as to protrude.
  • a cylindrical connecting member 115 is attached to the flange 111 a at the periphery of the opening of the antenna 111, and the pair of support members 117 and 117 are reflected from the connecting member 115 at the same horizontal position as the axis of the waveguide 112. It extends to the plate side.
  • the support shafts 121 and 121 of the reflection plate 120 are supported by the support members 117 and 117.
  • the reflecting surface 120a of the reflecting plate 120 freely rotates about the support shafts 121, 121 toward the antenna side or the opening side.
  • the waveguide is rotated in the same direction (arrow X direction) as the waveguide 112 is rotated by the waveguide rotating means.
  • a mounting piece 122 is provided on the back surface of the reflecting plate 120 (the surface opposite to the reflecting plate 120a) at the center of the reflecting surface 120a or at a position above and below the reflecting plate 120a.
  • a rod-shaped member 127 connected to the tip of the piston rod 126 is connected. 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. Then, 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 cylinder 125 is driven by the reflecting plate tilting means having such a link mechanism, and the reflecting plate 120 is rotated about the support shafts 121 and 121 in the arrow Y direction. Thereby, the microwave or the millimeter wave is shaken in the left-right direction in the figure as indicated by M and sent into the furnace.
  • the reflection surface 120a of the reflection plate 120 is moved in the X direction and the Y direction by the combination of the rotation by the waveguide rotation means and the back and forth movement of the piston rod in the reflection plate inclination means. It can be freely rotated in the direction, and the surface of the charge 7 can be scanned in a planar shape.
  • 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 reflector 120 is disclosed in Patent Document 2. Compared with the case where the tilt control in the X direction and the Y direction is simultaneously performed, the apparatus configuration and control are simplified.
  • the surface of the charge 7 is elliptical. Will be scanned.
  • the rotation angle X of the waveguide 112 is fixed at 0 °, the rotation angle Y of the reflection plate 120 is changed, and the surface of the charge 7 is scanned linearly, The position where the charge 7 is in contact with the inner wall of the blast furnace 6 is detected, and the diameter d of the surface of the charge 7 is measured.
  • Increasing the rotation angle Y (swing width) of the reflector 120 increases the scanning distance, and eventually the reflected wave by the inner wall of the blast furnace 6 is detected beyond the outer peripheral edge of the charge 7, The distance between them can be regarded as the diameter d of the charge 7.
  • the rotation angle Y ( ⁇ 0 ) of the reflection plate 120 required for scanning the line segment D 0 having a length corresponding to the diameter d, the rotation start point, and the rotation end point are obtained.
  • the reflector 120 is swung in the left-right direction in the figure, and the rotation angle around the axis C of the blast furnace 6 can be set to the + side on the right side and the-side on the left side. Therefore, the rotation starting point is represented as + a °, for example, and the rotation end point is represented as ⁇ b °.
  • the rotation angle X of the waveguide 112 is rotated in either direction, for example, + 2 ° (in the example in the figure, the upper side of D 0 is scanned), and the rotation angle Y of the reflection plate 120 is changed.
  • the trajectory of scanning becomes a linear shape that is translated upward by a distance S 2 with respect to D 0 .
  • the reflecting plate 120 obtains a distance between both ends by detecting both ends of charge 7 is in contact with the inner wall of the blast furnace 6, the reflecting plate 120 times required to scan the length of the line segment D 2 which corresponds to the distance
  • the moving angle Y ( ⁇ 2 ) and the rotation start point and rotation end point are obtained.
  • the rotation angle X of the waveguide 112 is increased, and the reflecting plate 120 is rotated for each rotation angle Xn , so that the charge 7 becomes the inner wall of the blast furnace 6 between the both ends thereof.
  • the rotation angle Y ( ⁇ n ) of the reflection plate 120 required for scanning the line segment D n having a length corresponding to the distance, and the rotation start point and the rotation end point.
  • the relationship between the rotation angle X of the waveguide 112, the rotation angle Y of the reflection plate 120, the rotation start point, and the rotation end point is mapped for each diameter d of the charge 7.
  • the reflecting plate 120 is rotated by setting the rotation angle X to 0 ° to measure the diameter d of the charge 7, and then the length corresponding to the diameter d obtained by the measurement is obtained. Based on the table corresponding to the line segment, the reflecting plate 120 is rotated while the rotation angle X is increased. Thereby, the inner part of the circumference of the charge 7 can be scanned without waste.
  • the rotation angle X of the waveguide 112 is fixed and the rotation angle Y of the reflection plate 120 is changed.
  • the rotation angle Y of the reflection plate 120 is fixed and the waveguide 112 May be rotated.
  • the relationship between the rotation angle X of the waveguide 112 and the rotation angle Y of the reflector 120 is obtained by measurement, but it can also be obtained by calculation as follows.
  • FIG. 5 shows a cross-sectional view of the blast furnace 6, where A is the center of the reflector 120, and Ha and Hb are the contact points between the outer peripheral end of the charge 7 and the inner wall of the blast furnace 6. and the distance a to the distance b from a to Hb, triangles are formed between the line segment D 0. Since the diameter d of the charge 7 is on a plane including Ha and Hb, when the diameter d of the charge 7 is measured as described above, Ha and Hb are determined from the design specifications of the blast furnace 6. . Since the center A of the reflector 120 is determined by the installation position of the surface detection device 100, a and b are also determined geometrically. The diameter d of the charge 7 corresponds to the length of the line segment D 0. Therefore, the lengths of a, b and the line segment D 0 are known, and the rotation angle Y ( ⁇ 0 ) of the reflector 120 with respect to the line segment D 0 is calculated geometrically.
  • the circumference of the charge 7, because determined by the length of the line segment D 0, parallel to the line segment D 0, 2 points opposing on the circumference of the same circle which corresponds to the line segment D 2 is determined It is done. These two points correspond to new Ha and Hb, which are referred to as Ha 2 and Hb 2 , respectively. Since the center A of the reflecting plate 120 is fixed, and the distance a 2 from A to Ha 2, the distance b 2 from A to Hb 2 is determined. Then, the rotation angle Y ( ⁇ 2 ) of the reflecting plate 120 is calculated from the length of the line segment D 2 , a 2 and b 2 .
  • the occasional reflector plates 120 pivot angle Y ( ⁇ n) is calculated in advance and mapped.
  • the length of the line segment D 0 corresponding to the diameter d of the charge 7 and each line translated from the line segment D 0 are obtained only by measuring the deposition position (Ha, Hb) of the charge 7.
  • the rotation angle Y of the reflecting plate 120 can be calculated every minute, and the surface of the charge 7 is scanned based on the calculation result.
  • the surface of the charge 7 can be scanned concentrically (FIG. 6) or spirally (FIG. 8) around the axis C of the blast furnace 6.
  • 6A is a view of the charge 7 seen from the upper surface of the blast furnace 6.
  • the direction along the axis of the waveguide 112 of the surface detection device 100 is the Y axis, and the direction orthogonal to the Y axis. Is the X axis.
  • 6B is a cross-sectional view seen from the X-axis direction
  • FIG. 6C is a cross-sectional view seen from the Y-axis direction.
  • the first scan S 1 is performed along the position of the charge 7 in contact with the inner wall of the blast furnace 6, that is, along the circumference of the charge 7.
  • the scanning starts from a point Xa where the rotation angle X of the waveguide 112 is 0, and proceeds in the Yb direction corresponding to the maximum rotation angle of the reflection plate 120 and follows a trajectory.
  • the rotation angle X of the waveguide 112 and the rotation angle Y of the reflector 120 are controlled simultaneously.
  • FIG. 7B is a diagram showing a change state of the waveform according to the elapsed time (T).
  • a solid line indicates a change in the rotation angle X of the waveguide 112 and a dotted line indicates a change in the rotation angle Y of the reflector 120 with time. Show. That is, the waveform W X (solid line) indicating the rotation angle X of the waveguide 112 and the waveform W Y (dotted line) indicating the rotation angle Y of the reflecting plate 120 overlap each other with a 90 ° phase shift.
  • a waveform W X ′ in which the change speed (wave slope) of the rotation angle X differs in time (T), such as drawing a circle on the surface of the charge 7, is obtained from measurement or obtained from calculation.
  • the rotation angle Y is symmetric with respect to the axis C of the blast furnace 6, and the waveform W Y shown by the dotted line in FIG. 7B is used as it is. To do.
  • the corrected waveform W X ′ related to the rotation angle X and the waveform related to the rotation angle Y for the scan S 1 are stored.
  • a waveform corrected for the rotation angle X is obtained and mapped.
  • the rotation angle of the waveguide 112 is set to 0 °
  • the reflector 120 is scanned at the maximum angle to obtain the diameter d of the charge 7, and the waveguide is guided based on the table corresponding to the diameter d.
  • FIG. 8 shows the case where the surface of the charge 7 is scanned along a helix centered on the axis C of the blast furnace 6.
  • the waveguide 112 and the reflector 120 are moved according to the helix equation. Rotate simultaneously.
  • the rotation speed of the waveguide 112 is corrected in consideration of the inclination of the microwave and the millimeter wave.
  • the starting point of the spiral is a position where the rotation angle X of the waveguide 112 is 0 °, and scanning is performed from the circumference of the charge 7 toward the axis C so that the radius of the spiral is gradually reduced.
  • the rotation angles X and Y of the waveguide 112 and the reflector 120 are mapped for each height of the charge 7 from the reflector 120, and the height of the charge 7 from the reflector 120 is measured in the measurement.
  • the thickness is measured, and scanning is performed in a rotation manner of the waveguide 112 and the reflecting plate 120 according to the diameter.
  • the antenna 111 may be a horn antenna with a lens.
  • the lens 113 is a semi-convex body made of a dielectric material such as ceramics, glass, or fluorine resin, and can converge and transmit microwaves and millimeter waves from the horn antenna, and shorten the horn length of the horn antenna.
  • the apparatus can be reduced in size.
  • illustration is omitted, a parabolic antenna can be used as the antenna 111.
  • 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 propagation unit 150 is a pressure-resistant container, and the propagation unit 150 accommodates the reflector 120, the filter 140, the air-impermeable partition wall 145, and the antenna 111, and the high-pressure inert gas (through the gas supply port 151) For example, nitrogen gas) is supplied.
  • 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. When the waveguide 112 is rotated, the connecting member 115 is also rotated accordingly, and when the vent hole 116 reaches the gas supply port 151, the inert gas from the gas supply port 151 enters the filter 140 through the vent hole 116.
  • 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 propagation part 150 and the connecting member 115. It is possible to prevent the intrusion of dust and 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
  • 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 also possible 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.
  • a window (not shown) is provided by opening the reflector 120 of the propagation unit 150 and the portion immediately above the filter 140, and the waveguide 112 and the reflector 120 are 180 when not measured.
  • the reflecting surface 120a and the filter 140 By turning the reflecting surface 120a and the filter 140 so as to face the window, the dust adhesion state of the reflecting surface 120a and the filter 140 can be observed.
  • 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 (see FIG. 20; reference numeral 154) is provided between the opening 6a of the blast furnace 6 and the surface detection device 100, for example, at the connection portion 152 of the propagation unit 150, and is opened during measurement and closed during non-measurement. It can also be a state.
  • the above is a configuration in which the antenna 111 and the reflection plate 120 are connected by the connection member 115 and the support member 117, and the reflection plate 120 is rotated in the same direction as the antenna 111 is rotated.
  • the antenna 111 does not rotate, and the reflecting plate 120 is tilted to the antenna side or the non-antenna side and is rotated about the center point of the reflecting surface 120a. It can also be. 9 and 10, the same members shown in FIGS. 1 and 2 are denoted by the same reference numerals, and the description of components other than the main members may be omitted.
  • the surface detection device 100 is configured such that the reflection plate 120 and the antenna 111 are disposed facing each other and accommodated in the propagation unit 150, as in the surface detection device shown in FIG. 1. And is attached to an opening 6 a in the vicinity of the top of the blast furnace 6.
  • an angle varying means 190 for controlling the inclination angle of the reflector 120 is mounted at a position orthogonal to the antenna 111.
  • the reflecting plate 120 is disposed immediately above the opening 6a, and support shafts 121 at both ends of the diameter are rotatably supported at both ends of a semi-annular support arm 185.
  • the support arm 185 is directly connected to the inner shaft 191 of the angle varying means 190.
  • the inner shaft 191 is rotationally driven by the first motor 194, and the reflecting plate 120 is rotated in the arrow X direction accordingly.
  • the tip 181 of the rod-shaped piece 180 is fixed to the center of the back surface 120b opposite to the reflection surface 120a of the reflection plate 120.
  • the rod-shaped piece 180 is connected to the connecting rod 183 via the first spherical plain bearing 182, and the other end of the connecting rod 183 is arranged coaxially with the inner shaft 191 via the second spherical plain bearing 184. It is connected to the tip of the provided outer shaft 192.
  • the outer shaft 192 is formed with a male screw 192a on the outer peripheral surface at the other end of the second spherical plain bearing 184, and is a female screw that is rotationally driven by a second motor 195 mounted on the inner shaft 191. It is screwed with a female screw 193 a formed on the inner peripheral surface of the member 193. Then, when the second motor 175 is driven, the female screw member 193 rotates and moves in the left-right direction in the drawing so that the outer shaft 192 approaches or separates from the reflecting plate 120, and accordingly the connecting rod 183 is shown in FIG. Move in the horizontal direction. The movement of the connecting rod 183 causes the first spherical plain bearing 182 to move circularly with the support shaft 121 as a fulcrum.
  • the tip 181 of the connecting rod 183 moves in a circular motion in conjunction with the movement of the first spherical plain bearing 182.
  • the reflector 120 rotates in the vertical direction in the figure, that is, in the direction of the arrow Y.
  • the female screw member 193 can be rotated by the rotational difference between the first motor 194 and the second motor 195 without mounting the second motor 195 on the inner shaft 191.
  • variable angle mechanism 190 configured as described above, when the inner shaft 191 and the outer shaft 192 cooperate, the reflecting plate 120 is inclined at a predetermined angle in the arrow Z direction by the rotation of the inner shaft 191 and at the same time, the outer shaft 192.
  • the tip 181 of the rod-shaped piece 180 in a circular motion to add rotation in the arrow Y direction and the reflector 120 can be tilted in any direction.
  • the variable angle mechanism 190 includes a first motor 194, a second motor 195, a part of the inner shaft 191 and the outer shaft 192, and a female screw member 193 housed in the container 210 and attached to the propagation unit 150. Yes. Further, the first motor 194 is connected to the external control unit through the connector 194a, and the second motor 195 is connected to the external control unit through the connector 195a, and power supply and rotation control are performed through the control unit.
  • the detection wave from the antenna 111 is reflected by the reflector 120 and directed toward the charge 7 in the furnace through the opening 6a in the same manner as the surface detection device shown in FIG. Transmit and scan the surface of charge 7.
  • the angle of the reflector 120 is scanned by the angle variable mechanism 190 in a concentric, spiral, or linear manner as described above.
  • the surface detection device 100 includes a display device (monitor) 200. It is attached.
  • the display method [screen] of the display device 200 will be described below.
  • FIG. 11 (A) is a surface image based on the surface profile of the obtained charge 7, and shows the deposition state of the surface of the charge 7 with contour lines connecting the points with the same accumulation amount.
  • FIG. 2B is a cross-sectional image showing the deposition state at an arbitrary position on the surface of the charge 7 along the axis of the blast furnace 6.
  • the cross sections along the lines X1 to X4 are displayed with different line types and line colors (in the example of the figure, four lines are changed). Thereby, the accumulation amount of the charge 7 for every accumulation location can be visually recognized.
  • the above displays the surface image and the cross-sectional image at the time of each charging operation, but by performing the charging operation a plurality of times and displaying the surface image and the cross-sectional image for a plurality of times at the same time, It is also possible to know the surface state and the deposition state in time series. That is, the surface profile is measured for each charging operation, the respective surface images and cross-sectional images are stored, and a plurality of charging operations can be collectively displayed on the same screen.
  • the charging operation is performed four times, the surface profile is measured for each charging operation, the respective surface images and cross-sectional images are stored, and as shown in FIG. Ti, T2, T3, T4) can be displayed simultaneously.
  • the large bell 8 obstructs the propagation path of the detection wave M, and scans the region indicated by reference numeral A2. I can't.
  • a part of the surface profile on the furnace wall side indicated by reference numeral A1 may not be measured.
  • the accumulation state of the charge 7 is important on the furnace wall side.
  • the obtained surface image and cross-sectional image are as shown in FIG.
  • a surface image and a cross-sectional image of the entire surface of the charge 7 are obtained as shown in FIG. 11, but in the surface image and the cross-sectional image shown in FIG.
  • the surface image and cross-sectional image of the corresponding region cannot be obtained.
  • a portion corresponding to the surface image of FIG. 11A is indicated by a dotted line in the surface image (A) of FIG.
  • a cross-sectional image along the line X2 is obtained over the entire inner diameter of the blast furnace 6, a surface image and a cross-sectional image in the region between A1 and A2 are obtained, and furthermore, along the lines X3 and X4, the blast furnace 6 is obtained. Therefore, the surface image and the cross-sectional image of the entire surface of the charge 7 can be approximately obtained from these images.
  • the surface image and the cross-sectional image along the lines X2, X3, and X4 indicate the deposition state in the vicinity of the furnace wall, and the fact that this can be detected greatly helps the charging operation.
  • the descending speed or amount of the charge 7 can be obtained from the surface profile.
  • the surface profile is measured immediately before and immediately after the charging operation. Then, by comparing the deposition profile immediately after charging at the previous charging with the deposition profile immediately before charging at the current charging, the charging between the previous charging and the current charging is performed. You can know the descending state of an object.
  • FIG. 15 is an example of a deposition profile immediately after charging at the time of the previous charging.
  • FIG. 15 (A) is a surface image of the charge 7
  • FIG. 15 (B) is a surface image of the charge 7. It is a cross-sectional image which shows the deposition amount (deposition height) along arbitrary straight lines. Further, in FIG. 15A, the accumulation state on the surface of the charge is indicated by contour lines connecting the points of the same accumulation amount.
  • FIG. 16 is an example of a deposition profile immediately before charging at the time of charging this time
  • FIG. 16A is a surface image
  • FIG. 16B is a cross-sectional image.
  • H portion
  • FIG. 16A it is displayed that the portion indicated by the symbol H (H portion) is greatly depressed
  • FIG. 16B the diameter passing through the vicinity of the center of the H portion (FIG. 16A).
  • the amount of deposition along the horizontal line indicated by the alternate long and short dash line) is displayed.
  • FIG. 17 is an image showing the descent speed or descent amount obtained from FIG. 15 and FIG. 16, where FIG. 17A is a surface image and FIG. 17B is a cross-sectional image.
  • the descending speed or the descending amount is substantially constant and the fluctuation allowable range Z, while the H part includes a part exceeding the allowable fluctuation range Z (shaded part in the figure).
  • the fluctuation allowable range Z can be arbitrarily set.
  • FIG. 18 is a cross-sectional image (B) showing the descent speed or descent amount in the surface image (A) and line segments (X1, X2, X3, X4) corresponding to FIG.
  • the cross-sectional image of FIG. 4B the
  • descent speed or descent amount measurement data can be stored continuously and displayed at any number of times to know the change in descent speed or descent amount.
  • the surface image and cross-sectional image based on the above-mentioned surface profile, as well as the distribution of the descent speed and descent amount helps to control the large bell and shooter as the charging means, thereby making the operation of the blast furnace more It can be performed stably.
  • the distribution of the charging amount from the charging means and the coke ratio are adjusted. It is also possible to adjust the amount of hot air supplied from the tuyere, the air temperature, the humidity, the amount of PCI (pulverized coal), etc., so that the abnormal charging portion or the abnormal lowering portion does not occur. Alternatively, an alarm may be issued when there is a charging abnormality part or a descent abnormality part.
  • the attachment to the antenna 111 can be prevented by providing the filter 140 and the air-impermeable partition 145, but it is possible to completely prevent dust from adhering to the reflection surface 120a of the reflection plate 120. Cannot be prevented. Also, dust adheres to the filter 140 and the air-impermeable partition 145.
  • the reflecting plate 120 is arranged so that the reflecting surface 120 a of the reflecting plate 120 faces a direction different from the opening 6 a of the blast furnace 6, specifically, the inner wall 150 a of the propagation unit 150. Rotate and transmit / receive the detection wave at the rotation position.
  • FIG. 20 is a cross-sectional view of the connecting portion between the opening and the propagation portion of the blast furnace as viewed from the side facing the reflecting surface. By this rotation of the reflecting plate 120, the reflecting surface 120a faces the inner wall 150a of the propagation unit 150, and performs transmission / reception with the inner wall 150a. Then, the reception strength at that time is set as the initial reception strength.
  • the reflecting surface 120a does not need to be at a position of 90 ° with respect to the center of the opening 6a as shown in the figure. Is unquestionable.
  • the reflecting plate 120 may be rotated 180 ° so that the reflecting surface 120a faces the inner wall 150a (the ceiling portion of the inner wall 150a in the figure) facing the opening 6a.
  • the reflecting surface 120a faces the inner wall 150a other than the window.
  • the operation of the blast furnace 6 is performed, and transmission / reception is performed with the inner wall 150a of the propagation unit 150 with the same measurement conditions as when the apparatus is mounted at predetermined time intervals, that is, the detection wave output and the rotation angle of the reflector 120 are the same.
  • To measure the reception strength at each measurement time and obtain the attenuation from the initial reception strength.
  • the time when the attenuation amount is equal to or greater than a preset threshold is determined that the amount of dust adhering to the filter 140, the air-impermeable partition wall 145, and the reflective surface 120a is large, and the replacement time or cleaning time is near. It is reflected in the decision of the replacement time and cleaning time.
  • the threshold value is determined in consideration of the safety factor, but it is appropriate that the reception intensity is about 50% of the initial reception intensity (50% in terms of attenuation rate).
  • the surface detection device 100 fixes the inclination angle of the reflector 120 to the antenna side or the non-antenna side, or the rotation angle of the antenna 111, scans the surface of the charge 7 linearly, and the surface profile thereof.
  • the surface image and the cross-sectional image may be displayed on the display device 200.
  • FIG. 1 While the rotation of the antenna 111 in the X direction is fixed at a rotation angle of 0 °, the tilt angle of the reflecting plate 120 in the Y direction is varied, thereby the charge 7.
  • 14A is displayed as a surface image, and a curve along the line X1 in FIG. 14B is displayed as a cross-sectional image.
  • the reflector 120 is fixed at an angle of 45 ° on both the antenna side and the furnace interior, and the antenna 111 is rotated to display the line X2 in FIG. A curve along the line X2 in B) is displayed.
  • the rotation and fixing of the antenna 111 and the reflection plate 120 as described above can be performed only by switching the operation / stop of the motor 130 (waveguide rotation means) or the cylinder 125 (reflection plate tilting means). Accordingly, the display is also switched.
  • the surface detection device of the present invention can scan the surface of the charged material quickly and without excess, the charging operation closer to the theoretical deposition profile can be performed, and the accumulation state of the charged material can be visually confirmed. In addition, it is possible to accurately know the timing of maintenance and parts replacement, and enables efficient blast furnace operation.
  • Blast furnace 7 Charge 7a: Iron ore 7b: Coke 10: Shooter 100: Surface detector 110: Transmission / reception means 111: Antenna 112: Waveguide 115: Connecting member 117: Support member 120: Reflector 121: Support Shaft 122: Mounting piece 125: Cylinder 126: Piston rod 127: Rod-shaped member 130: Motor 131: Motor side gear 132: Waveguide side gear 140: Filter 145: Non-air-permeable partition wall 150: Propagation unit 200: Display device

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  • Length-Measuring Devices Using Wave Or Particle Radiation (AREA)
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Abstract

La présente invention concerne une antenne et une plaque de réflexion qui sont couplées à un élément d'accouplement, les deux étant mis en rotation dans la même direction par un moyen de rotation de guide d'ondes, et la surface de réflexion de la plaque de réflexion est inclinée par rapport au côté antenne ou au côté opposé à l'antenne par un moyen d'inclinaison de plaque de réflexion, ce qui permet de simplifier le dispositif, et les surfaces d'un matériau chargé sont balayées au moyen d'ondes de détection en cercles concentriques, ou similaires, en faisant fonctionner le moyen de rotation de guide d'onde et le moyen d'inclinaison de plaque de réflexion par complémentarité de forme, de telle sorte que toutes les surfaces du matériau chargé soient balayées de manière appropriée à une vitesse élevée. De même, une image de surface et une image en coupe transversale du profil de dépôt du matériau chargé sont affichées.
PCT/JP2016/072905 2015-08-04 2016-08-04 Dispositif de détection de surface et procédé de chargement d'un matériau chargé dans un haut fourneau et procédé de fonctionnement d'un haut fourneau WO2017022818A1 (fr)

Applications Claiming Priority (8)

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JP2015-154230 2015-08-04
JP2015154230A JP6533938B2 (ja) 2015-08-04 2015-08-04 高炉内装入物の表面検出装置における粉塵付着状況の検知方法
JP2015-172030 2015-09-01
JP2015172030A JP6595265B2 (ja) 2015-09-01 2015-09-01 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
JP2016-010799 2016-01-22
JP2016010799A JP2017128783A (ja) 2016-01-22 2016-01-22 高炉プロファイルメータの表示方法及び高炉への装入物の装入方法
JP2016033340A JP2017150035A (ja) 2016-02-24 2016-02-24 高炉プロファイルメータの表示方法及び高炉への装入物の装入方法
JP2016-033340 2016-02-24

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EP3778928A4 (fr) * 2018-03-28 2021-02-17 JFE Steel Corporation Installation de haut fourneau et procédé de fonctionnement pour haut fourneau
US11512899B2 (en) 2018-03-28 2022-11-29 Jfe Steel Corporation Blast furnace apparatus and operation method for blast furnace
CN111886348A (zh) * 2018-03-28 2020-11-03 杰富意钢铁株式会社 高炉设备及高炉的作业方法
KR20200133382A (ko) * 2018-03-28 2020-11-27 제이에프이 스틸 가부시키가이샤 고로 설비 및 고로의 조업 방법
US11940215B2 (en) 2018-03-28 2024-03-26 Jfe Steel Corporation Blast furnace apparatus and operation method for blast furnace
EP3778927A4 (fr) * 2018-03-28 2021-02-17 JFE Steel Corporation Installation de haut-fourneau et procédé d'exploitation de haut-fourneau
CN111886347A (zh) * 2018-03-28 2020-11-03 杰富意钢铁株式会社 高炉设备以及高炉的操作方法
CN111886347B (zh) * 2018-03-28 2022-08-12 杰富意钢铁株式会社 高炉设备以及高炉的操作方法
KR102472919B1 (ko) * 2018-03-28 2022-11-30 제이에프이 스틸 가부시키가이샤 고로의 조업 방법
CN112335127B (zh) * 2018-04-27 2023-09-01 上海诺基亚贝尔股份有限公司 多频段射频(rf)天线系统
CN112335127A (zh) * 2018-04-27 2021-02-05 上海诺基亚贝尔股份有限公司 多频段射频(rf)天线系统
CN108642223A (zh) * 2018-05-18 2018-10-12 天津市三特电子有限公司 具有旋转功能的高炉成像设备退出防护装置
CN108642223B (zh) * 2018-05-18 2023-09-26 天津市三特电子有限公司 具有旋转功能的高炉成像设备退出防护装置
WO2022209021A1 (fr) * 2021-03-29 2022-10-06 日鉄エンジニアリング株式会社 Dispositif de mesure de comportement de sédimentation de matériau chargé, et procédé de mesure de comportement de sédimentation de matériau chargé
JP6893588B1 (ja) * 2021-03-29 2021-06-23 日鉄エンジニアリング株式会社 装入物沈下挙動測定装置および装入物沈下挙動測定方法

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