JP2022179120A - Surface profile detection device for charged material in blast furnace - Google Patents

Abstract

To detect a surface profile of a charged material by preventing the entry of a charged material suspending in a blast furnace into a device and accurately and stably transmitting and receiving a detection wave.SOLUTION: A detection device transmits a detection wave toward a surface of a charged material accumulated in a blast furnace 1 through an opening part 2 of the blast furnace to which the charged material, such as iron ore, coke, and lime is supplied, receives a detection wave reflected on the surface of the charged material, and detects a surface profile of the charged material. The detection device includes: a rotary plate 120 that rotates in parallel with the opening part 2; an angle variable reflection plate 140 and an angle fixed reflection plate 138 mounted on the rotary plate 120; an antenna 135 which transmits a detection wave to the angle fixed reflection plate 138; a sealing box 200 which surrounds the antenna 135, the angle variable reflection plate 140 and the angle fixed reflection plate 138; and a purge gas injection device 220 which injects a purge gas toward a bottom surface 201 of the sealing box 200.SELECTED DRAWING: Figure 1

Description

TECHNICAL FIELD The present invention relates to a detector for detecting the surface profile of iron ore, coke, lime, etc. (hereinafter collectively referred to as "charge") in a blast furnace.

In a blast furnace, it is possible to reduce the fuel cost and extend the life of the furnace body by optimizing the deposition state of the burden material and stabilizing the gas flow in the furnace. In order to obtain an appropriate deposition state, the surface profile of the charge is accurately measured in a short time, and the charge is adjusted so as to obtain a theoretical deposition state obtained in advance, that is, a "theoretical deposition profile". need to be replenished.

In order to detect the surface profile of the charge of such a blast furnace, the present applicant also previously proposed a detection device shown in Patent Document 1. In the detection device described in Patent Document 1, a variable angle reflector and a fixed angle reflector are used, and the angle variable reflector and the fixed angle reflector are used. , mounted on a rotating plate that rotates horizontally with the opening of the blast furnace, and by rotating the rotating plate, the surface profile of the burden accumulated in the blast furnace can be quickly detected linearly or planarly. is doing.

Japanese Patent No. 6857933

However, the above detection device is attached to an opening formed in a blast furnace, and the antenna, the variable angle reflector, and the fixed angle reflector are exposed to the opening. Therefore, the charge floating in the blast furnace may enter the apparatus through the opening and adhere to the antenna, the variable angle reflector, and the fixed angle reflector, adversely affecting the transmission and reception of the detection wave. Therefore, it is conceivable to periodically stop the operation of the detection device and clean the antenna and the reflector, but this will stop the operation of the blast furnace and reduce productivity.

The present invention has been made in view of such circumstances, and is capable of preventing the charge floating in the blast furnace from entering into the equipment and performing accurate and stable transmission and reception of detection waves. The purpose is to detect the surface profile of an object.

In order to solve the above problems, the present invention provides the following surface profile detection device for blast furnace contents.
(1) In a blast furnace to which a charge such as iron ore, coke, lime, etc. is supplied, a detection wave is transmitted toward the surface of the charge accumulated in the furnace through an opening opening in the blast furnace. and receiving the detection wave reflected from the surface of the charge to detect the surface profile of the charge,
a rotating plate that is installed above the opening and rotates around the center of the opening;
rotating means for rotating the rotating plate;
a cylindrical rotating shaft having an opening at the center of the rotating plate, mounted concentrically with the opening, and containing an antenna therein;
Transmitting/receiving means installed above the end of the rotating shaft opposite to the opening and connected to the antenna for linearly transmitting and receiving the detected wave along the radial direction of the rotating plate When,
a variable angle reflector attached to the rotating plate and arranged in the space between the opening and having a reflecting surface with a variable angle;
It is attached to the rotating plate and disposed in the space between the opening and the angle of the reflecting surface is fixed to send the detection wave from the antenna to the reflecting surface of the angle-variable reflecting plate. and a fixed angle reflector of
Part or all of a bottom surface attached to the rotating plate, extending from the rotating plate toward the opening, surrounding the variable angle reflector and the fixed angle reflector, and facing the opening a sealing box having a plate member made of a heat-resistant material that transmits the detection wave;
a single or a plurality of purge gas ejection devices for ejecting purge gas toward the bottom surface in a space between the bottom surface and the opening;
A surface profile detection device for a blast furnace insert, comprising:
(2) In a blast furnace to which a charge such as iron ore, coke, or lime is supplied, a detection wave is transmitted toward the surface of the charge deposited in the furnace through an opening in the blast furnace. and receiving the detection wave reflected from the surface of the charge to detect the surface profile of the charge,
a rotating plate that is installed above the opening and rotates around the center of the opening;
rotating means for rotating the rotating plate;
an antenna attached to the rotating plate and disposed in the space between the opening;
Transmitting/receiving means connected to the antenna for linearly transmitting and receiving the detected wave along the radial direction of the rotating plate;
a variable angle reflector attached to the rotating plate and arranged in the space between the opening and having a reflecting surface with a variable angle;
A fixed angle for sending the detection wave from the antenna to the reflecting surface of the variable angle reflector, which is attached to the rotating plate so as to face the variable angle reflector, and has a fixed angle of the reflecting surface. a reflector;
part of a bottom surface attached to the rotating plate, extending from the rotating plate toward the opening, surrounding the antenna, the variable angle reflector, and the fixed angle reflector, and facing the opening; or a sealing box having a plate material entirely made of a heat-resistant material that transmits the detection wave;
a single or a plurality of purge gas ejection devices for ejecting purge gas toward the bottom surface in a space between the bottom surface and the opening;
A surface profile detection device for a blast furnace insert, comprising:
(3) The blast furnace according to (1) or (2) above, wherein the purge gas ejection device is composed of a plurality of ejection nozzles, and each of the ejection nozzles has a different ejection angle with respect to the bottom surface. Surface profile detection device for inner packaging.
(4) The surface profile detection device for blast furnace inserts according to any one of (1) to (3) above, wherein the opening of the blast furnace is covered with a wire mesh.

In the apparatus for detecting the surface profile of blast furnace contents according to the present invention, the sealing box surrounds the variable angle reflector, the fixed angle reflector, and the antenna, which are arranged between the rotating plate and the opening of the blast furnace. Charges floating in the blast furnace will not enter the equipment. In addition, the sealing box rotates together with the rotating plate, and the purge gas from the purge gas jetting device is jetted there, and the purge gas flows planarly as the rotating plate rotates. You can remove things effectively.

In this way, the charge from the blast furnace can be prevented from entering the apparatus, and simultaneously with the rotation of the rotating plate, that is, at the same time as the surface profile detection operation, the charge adhering to the bottom surface of the sealing box can be removed. Objects can be removed, and detection waves can be sent and received accurately and stably without maintenance.

FIG. 1 is a cross-sectional view showing a first embodiment of a surface profile detection apparatus for blast furnace contents according to the present invention. FIG. 2A is a perspective view of a sealing box. FIG. 2B is a bottom view of the sealing box. FIG. 3A is a top view showing a purge gas jetting device, FIG. 3B is a side view thereof, and FIG. is. FIG. 4 is a diagram showing the flow of purge gas on the bottom surface of the sealing box according to FIG. FIG. 5 is a cross-sectional view showing a second embodiment of the blast furnace charge surface profile detection device of the present invention.

Hereinafter, the present invention will be described in detail with reference to the drawings.

[First embodiment]
FIG. 1 is a cross-sectional view showing a first embodiment of a surface profile detection device for blast furnace contents (hereinafter also referred to as a "detection device") of the present invention. Note that the detection device 100 shown in FIG. 1 can refer to the first embodiment of Patent Document 1. FIG.

As shown in FIG. 1 , the detection device 100 is installed in an opening 2 near the top of a blast furnace 1 . The detection device 100 includes a rotating plate 120 that rotates horizontally with respect to the opening 2 of the blast furnace 1 as indicated by symbol Y, centering on a rotating shaft 110 installed above (directly above) the opening 2. .

The rotating plate 120 is an annular disc with an open center. A central opening of the rotary plate 120 is indicated by reference numeral 121 .

Rotating shaft 110 is cylindrical, accommodates antenna 135 therein, and is attached concentrically with opening 121 of rotating plate 120 . The antenna 135 is connected to the transmitting/receiving means 130 of the detection wave M via the waveguide 133 . The waveguide 133 is configured such that the upper end portion of the connecting rod 114 on the transmitting/receiving means 130 side is separated so that the transmitting/receiving means 130 does not rotate. This separated portion is denoted by reference numeral 180, and the interval of the gap is set to be less than the wavelength of the detected wave M so that the detected wave M does not leak. Also, the waveguide 133 is aligned with the axis of the rotating shaft 110 . In order to improve the directivity of the detected wave M, the antenna 135 may be provided with a dielectric lens 136 made of fluorine resin or the like on the antenna surface. Further, the dielectric lens 136 can also correspond to a millimeter wave as the detection wave M. FIG. Furthermore, by using a parabolic antenna or a Cassegrain antenna as the antenna 135, the vertical dimension of the detection apparatus 100 as a whole can be reduced, and the dielectric lens 136 can be omitted.

A gear 112 is provided on the outer peripheral surface of the rotating shaft 110, and the gear 112 is meshed with a gear 155 of a motor 113 (rotating means). Therefore, by driving the motor 113, which is a rotating means, the rotating shaft 110 rotates as indicated by symbol Y in the figure, and accordingly the rotating plate 120 rotates in the same direction as the rotating shaft 110 in the blast furnace 1. It rotates horizontally with respect to the opening 2 .

In the space below the rotating plate 120 and between the opening 2 of the blast furnace 1, a fixed angle reflector 138 and a variable angle reflector 140 for transmitting and receiving the detection wave M into the furnace are arranged. is set.

The fixed-angle reflector 138 is a reflector whose reflecting surface has an inclination angle fixed at 45°, and includes a first fixed-angle reflector 138A, a second fixed-angle reflector 138B, and a third fixed-angle reflector. It consists of a plate 138C. The first fixed-angle reflector 138A faces the antenna surface of the antenna 135 (the dielectric lens 136 in the example shown) through the opening 121 of the rotating plate 120 . The second fixed angle reflector 138B faces the first fixed angle reflector 138A, and the third fixed angle reflector 138C faces the second fixed angle reflector 138B. Therefore, as indicated by the dashed line in the drawing, the detection wave M transmitted from the antenna 135 is reflected by the first fixed angle reflector 138A, sent to the second fixed angle reflector 138B, and is transmitted to the second fixed angle reflector 138B. After being reflected by the fixed angle reflector 138B, it is sent to the third fixed angle reflector 138C. Then, the light is reflected by the third fixed angle reflector 138</b>C and sent to the variable angle reflector 140 .

These first fixed-angle reflector 138A, second fixed-angle reflector 138B, and third fixed-angle reflector 138C are fixed members (not shown) hanging down from the rotating plate 120 toward the opening 2 of the blast furnace 1. ). Alternatively, a first fixed angle reflector 138A, a second fixed angle reflector 138B and a third A fixed angle reflector 138C can also be attached.

As the detection wave M, it is preferable to use a microwave or a millimeter wave because the temperature inside the furnace is high and dust and water vapor are present. In particular, millimeter waves are preferable because they have shorter wavelengths and higher directivity than microwaves.

The angle-variable reflector 140 is a reflector whose inclination angle of the reflective surface 140a is variable in the direction indicated by symbol X in the figure. In this variable angle reflector 140, the first link 117a of the link mechanism 117 is fixed at the center of the surface (rear surface) opposite to the reflecting surface 140a, and the second link 117b is connected to the first link 117a. is doing. A connecting rod 114 is connected to the second link 117b and passes through the inside of the rotating shaft 110 through the opening 121 of the rotating shaft 110. A rack gear is attached to the end of the connecting rod 114 opposite to the second link 117b. 118 are formed.

The connecting rod 114 has an outer tube portion 114a having a waveguide 133 connecting the antenna 135 and the transmitting/receiving means 130 as an inner tube, and a rack gear 118 is formed on the outer peripheral surface of the outer tube portion 114a. A gear 119 of a motor 125 is meshed with the rack gear 118 , and when the motor 125 is driven, the gear 119 rotates and is converted into linear motion by the rack gear 118 . An encoder 126 is connected to the motor 125 to detect the amount of rotation of the motor 125 and the amount of rotation of the gear 119 .

Moreover, the connecting rod 114 has an intermediate portion 114 b extending toward the rotating plate 120 inside the rotating shaft 110 so as to avoid the antenna 135 . The end portion of the outer tube portion 114a on the rotating shaft 110 side is bent outward, and the intermediate portion 114b is connected to this bent portion.

Furthermore, the intermediate portion 114b has a lower end portion 114c that extends through the opening 121 of the rotating plate 120 to the opening 2 of the blast furnace 1 . This lower end portion 114 c is connected to the second link 117 b of the link mechanism 117 .

Rotation of the connecting rod 114 is converted into linear motion by the rack gear 118 through the gear 119, and the connecting rod 114 moves toward or away from the variable angle reflector 140 as indicated by symbol H in the drawing. and move in a straight line.

Also, although not shown, the portion of the waveguide 133 on the antenna 135 side may be free from the rotating shaft 110 so that the waveguide 133 does not rotate even when the rotating shaft 110 rotates. Thus, there is also a method in which the waveguide 133 is not divided at the separation portion 180 .

Alternatively, an insertion hole having a diameter slightly larger than that of the waveguide 133 may be provided in the top plate 111 of the rotating shaft 110 so that the antenna 135 does not rotate even when the rotating shaft 110 rotates.

Support shafts 141 , 141 project from both diametrical ends of the angle-variable reflector 140 , and the support shafts 141 , 141 are rotatably attached to support arm holding rods 145 .

When the connecting rod 114 moves toward the variable angle reflector 140 (downward in the drawing), the reflecting surface 140a of the variable angle reflector 140 is tilted to face the inner wall of the blast furnace 1 via the link mechanism 117. , when the connecting rod 114 moves to the opposite side of the variable angle reflector 140 (upward in the figure), the reflecting surface 140a of the variable angle reflector 140 is tilted to face the axis of the blast furnace 1 via the link mechanism 117. do. That is, by lowering and raising the connecting rod 114, the inclination of the reflecting surface 140a of the angle-variable reflecting plate 140 can be changed in the X direction in the figure.

Accompanying this, the detection wave M sent from the third fixed angle reflector 138C of the fixed angle reflector 138 to the variable angle reflector 140 is swung in the horizontal direction in the drawing as indicated by symbol Z, and the rotating plate 120 It becomes a linear shape along the radial direction of , and is sent into the furnace.

The detection wave M is reflected by the surface of the charge (not shown) deposited in the furnace, and is received by the transmitting/receiving means 130 along the same path as when transmitted. Transmission and reception can be performed, for example, by the FM-CW system.

By transmitting and receiving this linear detection wave M while rotating the rotating plate 120 around the rotating shaft 110, the distance information in the circular scanning area throughout the furnace of the blast furnace 1, that is, the entire surface of the charge A surface profile ranging from .

Furthermore, a sealing box 200 is attached to the rotating plate 120 and extends from the rotating plate 120 toward the opening 2 of the blast furnace 1 to surround the variable angle reflector 140 and the fixed angle reflector 138. It rotates in the Y direction together with the plate 120 . The sealing box 200 is, for example, a substantially cylindrical body obtained by cutting a part of a cylindrical body as shown in FIG. A part (see FIGS. 2A and 2B) is a plate member 210 made of a heat-resistant material through which the detection wave M is transmitted. A ceramic plate, a glass plate, or the like can be used as the plate material 210 .
Although illustration is omitted, the sealing box 200 may be a normal cylindrical body partially uncut, in addition to the substantially cylindrical body shown in FIG. 2A.

When part of the bottom surface 201 of the sealing box 200 is made of a plate material 210, for example, as shown in FIGS. A plate member 210 is attached so as to close the opening 202 . The radial length L of the opening 202 is set according to the amplitude of the detection wave M shown in FIG. 1 in the Z direction. For example, when the detection wave M linearly scans from the side wall of the blast furnace 1 over the center of the blast furnace 1, the opening 202 of the bottom surface 201 is also formed in a track shape including the center C of the bottom surface 201 accordingly.

Alternatively, although not shown, the opening 202 may be a track-shaped, rectangular opening 202 extending substantially the entire diameter of the bottom surface 201 .

The peripheral wall of the sealing box 200 is made of metal, and only a part of the bottom surface 201 is made of a plate material 210 such as a ceramic plate or a glass plate compared to the case where the entire bottom surface 201 is made of a plate material 210 such as a ceramic plate or a glass plate. , and other parts are made of the same metal as the peripheral wall, the strength of the sealing box as a whole increases.

With such a sealing box 200, even if the charge floating in the blast furnace 1 enters the detection device 100 through the opening 2, it will not reach the variable angle reflector 140 and the fixed angle reflector 138. . A rotating shaft 110 is attached to the rotating plate 120 , an antenna 135 is housed in the rotating shaft 110 , and the detected wave M is transmitted and received through an opening 121 in the center of the rotating plate 120 . Therefore, without the sealing box 200 , the charge floating in the blast furnace 1 also reaches the antenna 135 accommodated inside the rotating shaft 110 . However, the presence of the sealing box 200 prevents the charge from reaching the antenna 135 as well. That is, the sealing box 200 can prevent the charge from entering the variable angle reflector 140 , the fixed angle reflector 138 , and the antenna 135 .

A purge gas injection device 220 is installed in the space between the bottom surface 201 of the sealing box 200 and the opening 2 of the blast furnace 1 . The purge gas ejection device 220, as shown in FIG. 3, is composed of a plurality of ejection nozzles 221A to 221C, for example, three ejection nozzles 221A to 221C as shown. However, although the jet nozzle may be provided in plural as shown in FIG. 3, it may be single. 3A is a top view, and FIG. 3B is a side view thereof. The three jet nozzles 221A to 221C face the bottom surface 201 of the sealing box 200 at different angles of inclination with respect to the axis O, as shown in FIG. 3(B). For this reason, as shown schematically in FIG. The purge gas reaches the positions (here, three positions).

Since the sealing box 200 rotates in the Y direction together with the rotary plate 120, the purge gas from the ejection nozzles 221A to 221C forms a concentric airflow around the center C of the bottom surface 201, as shown in FIG. , this concentric airflow spreads over the entire surface of the bottom surface 201 . Since the plate material 210 of the bottom surface 201 always returns to the position facing the purge gas ejection device 220 when the rotating plate 120 makes one turn, even if the charged material enters through the opening 2 of the blast furnace 1 and adheres to the plate material 210, It is reliably removed by purge gas. Moreover, since such adhesion prevention by purge gas is performed at the same time as the detection of the surface profile of the charged material, the operation of the blast furnace 1 is not stopped, and maintenance-free operation is realized.

As the purge gas, an inert gas such as nitrogen gas (N ₂ ) can be used. Also, the purge gas jetting device 220 may be single or plural, but if there are too many, the concentric airflow of the purge gas may be disturbed.

Again referring to FIG. 1, in the space between the sealing box 200 and the opening 2 of the blast furnace 1, one or more observation windows 230 for the bottom surface 201 and the plate member 210 (one in FIG. ) can also be set. The observation window 230 is used to observe the bottom surface 201 and the plate member 210 of the sealing box 200. If the purge gas cannot completely prevent the charge from adhering, a cleaning jig is inserted through the observation window 230 to remove the adhered device. pay off the goods.
It should be noted that the observation window 230 should be closed with the removable lid 250 during the operation of detecting the surface profile.

Also, the opening 2 of the blast furnace 1 can be closed with the wire mesh 240 . From the blast furnace 1, in addition to the floating small-diameter charge, large-diameter charge may also be ejected from the surface of the accumulated charge. In order to prevent a large-diameter charge from colliding with the sealing box 200, the opening 2 is closed with a wire mesh 240 to prevent the plate member 210 on the bottom surface 201 from being broken or damaged.

Since the detection waves M are transmitted and received using the openings of the wire mesh 240, there is substantially no effect on the detection of the surface profile of the charge.

Furthermore, as shown in FIG. 1, on the wire mesh 240 closing the opening 2 of the blast furnace 1, for example, a heat-resistant ceramic fiber such as "Tyranno Fiber" manufactured by Ube Industries, Ltd. is woven to provide breathability. The purge gas may be jetted into the furnace by laying a filter 260 having

[Second embodiment]
FIG. 5 is a cross-sectional view showing a second embodiment of the detection device of the present invention. Note that the detection device 100 shown in FIG. 5 can refer to the third embodiment of Patent Document 1. FIG.

As shown in FIG. 5, the detecting device 100 rotates around a rotating shaft 110 horizontally with respect to the opening 2 of the blast furnace 1 as indicated by Y. On the lower surface of the rotating plate 120, a detection wave M A transmission/reception means 130 for transmitting and receiving is mounted. An antenna 135 is connected to the transmitting/receiving means 130, and directly below the antenna 135, a fixed angle reflector 138 having a fixed inclination angle of a reflecting surface 138a is provided. Further, the antenna 135 may be provided with a dielectric lens 136 on the antenna surface in order to improve the directivity of the detected wave M. FIG.

Although not shown, the transmitting/receiving means 130 may be placed on the inner tube 115 and a waveguide or coaxial cable may be inserted in the inner tube 115 and connected to the antenna 135 . Thereby, the transmitting/receiving means 130 can be protected from the high temperature of the blast furnace 1 .

The rotating shaft 110 has a double tube structure, and the end of the outer tube 116 on the side of the opening 2 is fixed to the rotating plate 120 . A gear 112 is provided on the outer peripheral surface of the outer tube 116 , and the gear 112 meshes with the gear 155 of the motor 113 . Therefore, by driving the motor 113, the rotating plate 120 fixed to the outer tube 116 rotates horizontally with respect to the opening 2 of the blast furnace 1, as indicated by symbol Y in the figure.

The inner tube 115 of the rotary shaft 110 has, via a link mechanism 117, an angle-variable reflector 140 whose inclination angle is variable in the direction indicated by symbol X in the drawing. installed. The variable-angle reflector 140 has a first link 117a of a link mechanism 117 fixed to the center of the surface opposite to the reflecting surface 140a. The tip of the inner tube 115 is connected to the 2-link 117b. A rack gear 118 is formed at the other end of the inner tube 115. A gear 119 of a motor (not shown) meshes with the rack gear 118. When the motor is driven, the gear 119 rotates and the rack gear 118 rotates. is converted to linear motion with Then, the inner tube 115 moves linearly to the side of the variable angle reflector 140 or to the opposite side, as indicated by symbol H in the drawing.

Support shafts 141 , 141 project from both diametrical ends of the angle-variable reflector 140 .

Then, when the inner pipe 115 moves toward the variable angle reflector 140 (downward in the figure), the reflecting surface 140a of the variable angle reflector 140 is tilted to face the inner wall of the blast furnace 1 via the link mechanism 117. , when the inner tube 115 moves to the opposite side of the variable angle reflector 140 (upward in the figure), the reflecting surface 140a of the variable angle reflector 140 is tilted to face the axis of the blast furnace 1 via the link mechanism 117. do. That is, by lowering and raising the inner tube 115, the inclination of the reflecting surface 140a of the angle-variable reflecting plate 140 can be changed in the X direction in the figure.

The fixed-angle reflector 138 and the variable-angle reflector 140 are arranged to face each other, and the detection wave M from the transmitting/receiving means 130 is reflected from the antenna 135 by the reflecting surface 138a of the fixed-angle reflector 138 to change the angle. After being sent to the reflecting surface 140a of the reflecting plate 140, it is sent from the reflecting surface 140a of the angle-variable reflecting plate 140 through the opening 2 of the blast furnace 1 into the furnace. At this time, by changing the inclination angle X of the reflecting surface 140a of the angle-variable reflecting plate 140, the transmission path of the detection wave M into the furnace is swung in the right and left direction in the figure, as shown by symbol Z. 120 becomes linear along the radial direction.

By transmitting and receiving this linear detection wave M while rotating the rotating plate 120 around the rotating shaft 110, the distance information in the circular scanning area throughout the furnace of the blast furnace 1, that is, the entire surface of the charge A surface profile ranging from .

Furthermore, the rotating plate 120 is provided with a sealing box 200 that extends toward the opening 2 of the blast furnace 1 and surrounds the antenna 135, the variable angle reflector 140, and the fixed angle reflector 138. rotates in the Y direction together with The sealing box 200 is part of a cylindrical body, and part or all of the bottom surface 201 facing the opening 2 of the blast furnace 1 (part in the example of the figure; see FIG. 5) transmits the detection wave M. It is a plate material 210 made of a heat-resistant material. A ceramic plate, a glass plate, or the like can be used as the plate material 210 .

Further, similarly to the first embodiment, a purge gas jetting device 220, an observation window 230, and a lid 250 can be installed in the space between the bottom surface 201 of the sealing box 200 and the opening 2 of the blast furnace 1. Furthermore, the opening 2 of the blast furnace 1 can be closed with a wire mesh 240, and on the wire mesh 240, a permeable filter 260 made of woven ceramic heat-resistant fibers may be laid.

As described above, the present invention has been described by exemplifying the embodiments, but the present invention is not limited to these and can be variously modified. For example, in the blast furnace 1, the charge is also supplied into the furnace by a chute. M is transmitting and receiving. For this purpose, the rotation of the motor 113 for rotating the rotating plate 120 and the rotation of the shooter are controlled, and such control can be added in the present invention.

1 blast furnace 2 opening 100 detector 110 rotating shaft 113 motor (rotating means)
114 connecting rod 117 link mechanism 120 rotating plate 130 transmitting/receiving means 135 antenna 138 fixed angle reflector 138A first fixed angle reflector 138B second fixed angle reflector 138C third fixed angle reflector 140 variable angle reflector 200 seal Stop box 201 Bottom surface 210 (of sealing box) Plate material 220 (made of heat-resistant material) Purge gas ejection devices 221A, 221B, 221C Ejection nozzle 230 Observation window 240 Wire mesh 250 Lid 260 Filter

Claims (4)

In a blast furnace to which a charge such as iron ore, coke, or lime is supplied, a detection wave is transmitted toward the surface of the charge deposited in the furnace through an opening opened in the blast furnace, A detection device for receiving the detection wave reflected from a surface of a charge to detect a surface profile of the charge,
a rotating plate that is installed above the opening and rotates around the center of the opening;
rotating means for rotating the rotating plate;
a cylindrical rotating shaft having an opening at the center of the rotating plate, mounted concentrically with the opening, and containing an antenna therein;
Transmitting/receiving means installed above the end of the rotating shaft opposite to the opening and connected to the antenna for linearly transmitting and receiving the detected wave along the radial direction of the rotating plate When,
a variable angle reflector attached to the rotating plate and arranged in the space between the opening and having a reflecting surface with a variable angle;
It is attached to the rotating plate and disposed in the space between the opening and the angle of the reflecting surface is fixed to send the detection wave from the antenna to the reflecting surface of the angle-variable reflecting plate. and a fixed angle reflector of
Part or all of a bottom surface attached to the rotating plate, extending from the rotating plate toward the opening, surrounding the variable angle reflector and the fixed angle reflector, and facing the opening a sealing box having a plate member made of a heat-resistant material that transmits the detection wave;
a single or a plurality of purge gas ejection devices for ejecting purge gas toward the bottom surface in a space between the bottom surface and the opening;
A surface profile detection device for a blast furnace insert, comprising: In a blast furnace to which a charge such as iron ore, coke, or lime is supplied, a detection wave is transmitted toward the surface of the charge deposited in the furnace through an opening opened in the blast furnace, A detection device for receiving the detection wave reflected from a surface of a charge to detect a surface profile of the charge,
a rotating plate that is installed above the opening and rotates around the center of the opening;
rotating means for rotating the rotating plate;
an antenna attached to the rotating plate and disposed in the space between the opening;
Transmitting/receiving means connected to the antenna for linearly transmitting and receiving the detected wave along the radial direction of the rotating plate;
a variable angle reflector attached to the rotating plate and arranged in the space between the opening and having a reflecting surface with a variable angle;
A fixed angle for sending the detection wave from the antenna to the reflecting surface of the variable angle reflector, which is attached to the rotating plate so as to face the variable angle reflector, and has a fixed angle of the reflecting surface. a reflector;
part of a bottom surface attached to the rotating plate, extending from the rotating plate toward the opening, surrounding the antenna, the variable angle reflector, and the fixed angle reflector, and facing the opening; or a sealing box having a plate material entirely made of a heat-resistant material that transmits the detection wave;
a single or a plurality of purge gas ejection devices for ejecting purge gas toward the bottom surface in a space between the bottom surface and the opening;
A surface profile detection device for a blast furnace insert, comprising: 3. The surface profile of the blast furnace insert according to claim 1, wherein said purge gas injection device comprises a plurality of injection nozzles, and said injection nozzles have different injection angles with respect to said bottom surface. detection device. 4. The surface profile detection device for blast furnace contents according to any one of claims 1 to 3, wherein said opening of said blast furnace is covered with a wire mesh.

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