JP6483641B2 - Blast furnace stave residual thickness measuring apparatus and blast furnace stave residual thickness measuring method - Google Patents

Description

  The present invention relates to a blast furnace stave residual thickness measuring apparatus and a blast furnace stave residual thickness measuring method for measuring a residual thickness of a stave used for cooling a blast furnace core.

  The blast furnace is provided with various cooling devices for the purpose of protecting the iron skin. A stave cooling type cooling device using a stave, which is one of such cooling devices, is widely used because the inner surface of the furnace is eroded almost smoothly and a profile preferable for operation is formed. In a blast furnace using a stave cooling type cooling device, management of the remaining thickness of the stave is important, and various methods for measuring the remaining thickness of the stave have been proposed.

For example, Patent Document 1 discloses a method in which an ultrasonic probe is brought into contact with the cooling water channel inner surface of the stave, and the thickness of the stave surface and the cooling water channel inner surface is measured with ultrasonic waves.
Further, Patent Document 2 discloses a method in which a marker having the same length as the thickness of the stave is embedded in the stave on the stave surface inside the blast furnace and the thickness is measured using ultrasonic waves. ing.

JP 2012-207270 A JP 63-073088 A

  However, in the remaining thickness measurement method described in Patent Document 1, unevenness is generated on the back surface of the stave due to wear, so that incident ultrasonic waves are irregularly reflected, and reflected ultrasonic waves (echoes) that can be measured by the probe are reduced. In addition, the remaining thickness of the stave could not be measured accurately. Further, since the stave is made of cast metal or copper, the remaining thickness measuring method described in Patent Document 1 cannot accurately grasp the sound speed of the ultrasonic wave, and can accurately measure the remaining thickness of the stave. could not. Furthermore, in the remaining thickness measuring method described in Patent Document 1, in order to accurately measure the remaining thickness, it is difficult to accurately measure the remaining thickness of the stave because the influence of casting tolerance must be taken into account. there were.

Further, the remaining thickness measuring method described in Patent Document 2 requires a process of embedding a marker in advance in the stave, which raises a problem that the manufacturing cost of the stave increases.
Accordingly, the present invention has been made paying attention to the above-mentioned problem, and provides a blast furnace stave residual thickness measuring apparatus and a blast furnace stave residual thickness measuring method capable of measuring the residual thickness of the stave accurately and inexpensively. It is an object.

In order to achieve the above object, a blast furnace stave residual thickness measuring apparatus according to an aspect of the present invention has a length that can be inserted from the outside of a blast furnace into a stave provided inside the blast furnace, and images the inside of the stave. A possible imaging unit; a measurement unit that measures the insertion depth of the imaging unit into the stave; and a display unit that displays an imaging result of the imaging unit.
The blast furnace stave remaining thickness measuring method according to one aspect of the present invention includes a step of inserting an imaging device into a measurement hole provided in the blast furnace, and an imaging device imaging the rear side end of the blast furnace stave. A step of measuring a first insertion depth which is an insertion depth, a step of measuring a second insertion depth which is an insertion depth when the imaging apparatus images the front side end of the stave, and a first Calculating the thickness of the stave from the insertion depth and the second insertion depth.

  According to the blast furnace stave residual thickness measuring apparatus and the blast furnace stave residual thickness measuring method according to the present invention, the residual thickness of the stave can be measured accurately and inexpensively.

It is a block diagram which shows the blast furnace stave residual thickness measuring apparatus which concerns on one Embodiment of this invention. It is the top view and side view which show the measurement part of a blast furnace stave residual thickness measuring apparatus. It is the II arrow directional view in FIG. It is a schematic diagram which shows a blast furnace and a stave. It is a schematic diagram which shows the remaining thickness measurement method of a stave. It is a schematic diagram which shows the imaging result in FIG. FIG. 6 is a schematic diagram showing a state after FIG. 5 in the method for measuring the remaining thickness of the stave. It is a schematic diagram which shows the imaging result in FIG. It is a schematic diagram which shows the modification of the remaining thickness measurement method of a stave. It is sectional drawing which shows the measurement part which concerns on other embodiment of this invention.

DESCRIPTION OF EMBODIMENTS Hereinafter, modes for carrying out the present invention (hereinafter referred to as embodiments) will be described in detail with reference to the drawings.
<Configuration of blast furnace stave residual thickness measuring device>
First, with reference to FIGS. 1-3, the structure of the blast furnace stave residual thickness measuring apparatus 1 which concerns on one Embodiment of this invention is demonstrated. As shown in FIG. 1, the blast furnace stave remaining thickness measuring apparatus 1 includes a measuring unit 2 and a display unit 3.

As shown in FIGS. 1 and 2, the measurement unit 2 includes a casing 21, an imaging unit 22, an irradiation unit 23, a heat insulating material 24, and a measurement unit 25.
As shown in FIGS. 2 and 3, the casing 21 is a metal pipe and has a substantially rectangular opening 211 provided on the surface on one end side. Moreover, the casing 21 has a length that can be inserted into a stave provided in the blast furnace in the longitudinal direction, as will be described later. Furthermore, the size in a cross section perpendicular to the longitudinal direction of the casing 21 is formed such that it can be inserted into a measurement hole formed in the blast furnace and the stave, as will be described later. Here, the measurement hole is a hole for inserting a measuring instrument such as a pressure gauge or a thermometer provided in advance in the blast furnace and the stave.

  The imaging unit 22 is an imaging device such as a video scope or a microscope, and includes a cable disposed along the inside of the casing 21 and an imaging unit 221 provided at the distal end of the cable serving as one end side of the casing 21. . In addition, as illustrated in FIG. 3, the imaging unit 22 captures an imaging area d including an irradiation area of a laser beam L described later. The distal end side of the cable provided with the imaging means 221 is configured such that the cable can be freely bent. The imaging unit 221 includes an imaging mechanism including an imaging element such as a small CCD (Charge-Coupled Device) sensor and a lens, and illumination such as an LED (Light Emitting Diode) that illuminates the imaging region d. Further, as shown in FIG. 3, the imaging unit 22 is arranged such that the distal end side of the cable is curved so that the distal end of the cable including the imaging unit 221 protrudes from the opening 211 of the casing 21 to the outside of the casing. Further, the imaging unit 22 is electrically connected to the display unit 3 and transmits imaging data to the display unit 3.

  The irradiation unit 23 is an irradiation device such as a laser pointer having a cable arranged along the inside of the casing 21 and a light source unit 231 provided at the tip of the cable. The light source unit 231 is disposed at a position where the opening 211 is formed in the longitudinal direction of the casing 21, and irradiates the laser beam L to the outside of the casing 21 through the opening 211. The light source unit 231 is supplied with power from a power source (not shown) through a cable. Furthermore, the irradiation unit 23 is fixed to the casing 21 so that the laser light L is irradiated in a direction substantially perpendicular to the longitudinal direction of the casing 21.

The heat insulating material 24 is provided at one end of the casing 21 so as to cover the opening at the tip.
The measuring unit 25 is provided along the surface of the casing 21 along the longitudinal direction of the casing 21 and measures the length of the casing 21. For example, the measurement unit 25 is a scale that displays the length of the casing 21.
The display unit 3 is a display device that displays imaging data acquired from the imaging unit 22 on a screen as a captured image.

<Stave thickness measurement method>
Next, a method for measuring the remaining thickness of the stave 5 using the blast furnace stave remaining thickness measuring apparatus 1 will be described with reference to FIGS. As shown in FIG. 4, the stave 5 is provided inside the blast furnace core 4, and a water channel 6 is formed therein. The stave 5 cools the iron skin 4 by the cooling water flowing through the water channel 6 and protects the iron skin 4. In the example shown in FIG. 5, the stave 5 is provided on the x-axis positive direction side, which is the inner direction of the iron skin 4. At this time, a gap 8 is formed between the iron skin 4 and the stave 5. In the following, the surface on the iron skin side where the gap 8 of the stave 5 is provided is referred to as the back surface, and the surface opposite to the back surface is referred to as the front surface. In addition, a water channel 6 extending in the y-axis direction, which is substantially the height direction of the blast furnace, is formed in the stave 5. Furthermore, a ridge 51 and a valley 52 are formed on the front surface of the stave 5 so as to protrude in the positive x-axis direction. Plural peaks 51 and valleys 52 are alternately formed along the iron skin 4 in the y-axis direction. In the region shown in FIG. 5, peak portions 51a and 51b and valley portions 52a and 52b are formed. The measurement hole 7 is formed in the peak portion 51b. The measurement hole 7 is formed penetrating from the iron skin 4 to the peak portion 51b, and a pressure gauge and a thermometer are provided inside during normal operation.

  As described above, the casing 21 has a length that can be inserted into the stave 5 provided in the blast furnace in the longitudinal direction. That is, the length of the casing 21 in the longitudinal direction is formed to be longer than the length of the measurement hole 7 that is the length from the outer surface of the iron skin 4 to the front side end of the stave 5. Similarly, the imaging unit 22 and the laser pointer disposed in the casing 21 are configured to have the same length as the casing 21.

The remaining thickness measurement of the stave 5 according to the present embodiment is performed when the blast furnace is closed. This is because the work area around the blast furnace is in a CO gas atmosphere during operation other than when there is no wind.
First, the operator inserts the blast furnace stave residual thickness measuring device 1 into the measurement hole 7 from the outside of the iron skin 4. At this time, as shown in FIG. 5, the blast furnace stave residual thickness measuring apparatus 1 is inserted from one end on the side where the heat insulating material 24 is provided, so that the penetration direction of the measurement hole 7 and the longitudinal direction of the casing 21 are parallel to each other. Inserted into. Further, the blast furnace stave remaining thickness measuring apparatus 1 is inserted to a position where the laser light L irradiated from the irradiation unit 23 hits the end on the back side of the stave 5. In the following, the depth at which the blast furnace stave remaining thickness measuring device 1 is inserted up to the position where the laser beam L hits the back side end of the stave 5 is referred to as a first insertion depth.

  Whether or not the blast furnace stave residual thickness measuring apparatus 1 has been inserted to the first insertion depth is confirmed by looking at the captured image displayed on the display unit 3. FIG. 5 shows a state in which the blast furnace stave residual thickness measuring apparatus 1 is inserted to the first insertion depth, and FIG. 6 shows a captured image displayed on the display unit 3 in the state of FIG. As shown in FIG. 6, the operator confirms that the blast furnace stave residual thickness measuring apparatus 1 has been inserted to the first insertion depth by checking the laser beam La that has hit the end of the stave 5 on the back side. Can be confirmed. In the method for measuring the remaining thickness of the stave 5 according to this embodiment, the end of the stave 5 can be visually recognized even in a dark place or a closed place by illuminating the imaging region d with the illumination of the imaging means 221.

Next, the operator confirms the measurement value of the measurement unit 25 at the first insertion depth. At this time, as shown in FIG. 5, the operator confirms the display position (the arrow position in FIG. 5) of the scale that is the measurement unit 25 on the outside of the iron skin 4.
Furthermore, the operator inserts the blast furnace stave residual thickness measuring apparatus 1 further into the blast furnace. At this time, the blast furnace stave remaining thickness measuring apparatus 1 is inserted to a position where the laser beam L irradiated from the irradiation unit 23 hits the front side end of the stave 5. In the following, the depth at which the blast furnace stave remaining thickness measuring device 1 is inserted up to the position where the laser beam L hits the front-side end of the stave 5 is referred to as a second insertion depth.

  Whether or not the blast furnace stave residual thickness measuring apparatus 1 has been inserted to the second insertion depth is confirmed by the operator looking at the display image displayed on the display unit 3 in the same manner as the confirmation of the first insertion depth. . FIG. 7 shows a state where the blast furnace stave residual thickness measuring apparatus 1 is inserted to the second insertion depth, and FIG. 8 shows a captured image displayed on the display unit 3 in the state of FIG. As shown in FIG. 8, the operator confirms that the blast furnace stave residual thickness measuring apparatus 1 has been inserted to the second insertion depth by checking the laser beam Lb that hits the end of the front-side stave 5. Can be confirmed.

  Here, in the present embodiment, the first and second insertion positions are determined by visually recognizing that the end of the stave 5 is irradiated with the laser light L. For this reason, compared with the case where the remaining thickness of the stave 5 is indirectly measured using the measuring apparatus using an ultrasonic wave, the remaining thickness can be measured with high accuracy. Note that the error in the measurement result of the remaining thickness of the stave 5 in this embodiment is about the irradiation diameter of the laser beam L irradiated by the irradiation unit 23 (for example, within ± 1 mm).

Thereafter, the operator confirms the measurement value of the measurement unit 25 at the second insertion depth. At this time, as shown in FIG. 7, the operator confirms the display position of the scale that is the measurement unit 25 on the outer side of the iron skin 4.
Next, after confirming the display value of the second insertion depth, the remaining thickness of the stave 5 is calculated from the display values of the first and second insertion depths. The remaining thickness of the stave 5 is calculated as a difference between the display value of the first insertion depth and the display value of the second insertion depth. In the present embodiment, as the remaining thickness of the stave 5, the thickness from the back surface to the front surface of the peak portion 51a (51) is measured.
Furthermore, when the blast furnace stave residual thickness measuring device 1 is pulled out from the measurement hole 7, the measurement is completed.

<Modification>
The preferred embodiments of the present invention have been described in detail above with reference to the accompanying drawings, but the present invention is not limited to such examples. It is obvious that a person having ordinary knowledge in the technical field to which the present invention pertains can come up with various changes or modifications within the scope of the technical idea described in the claims. Of course, it is understood that these also belong to the technical scope of the present invention.

  For example, in the above embodiment, the blast furnace stave residual thickness measuring device 1 is inserted into the measurement hole 7 formed in the peak portion 51a (51) from the iron skin 4, but the present invention is not limited to such an example. For example, as shown in FIG. 9, the blast furnace stave residual thickness measuring apparatus 1 may be inserted into the measurement hole 7 formed in the valley 52b (52) from the iron shell 4. Under the present circumstances, the thickness from the back surface to the front surface in the trough part 52b (52) is measured as a remaining thickness of the stave 5 by measuring similarly to the said embodiment.

  Moreover, in the said embodiment, although it was set as the structure which inserts the blast furnace stave residual thickness measuring apparatus 1 in the measurement hole 7, this invention is not limited to this example. For example, the remaining thickness of the stave 5 may be measured by forming a hole for measuring the remaining thickness penetrating from the iron skin 4 to the stave 5 in advance and inserting the blast furnace stave remaining thickness measuring device 1 into this hole.

  Furthermore, the measurement part 2 may have the structure shown in FIG. 10 as a structure other than the said embodiment. In the example illustrated in FIG. 10, the measurement unit 2 includes a casing 21, an imaging unit 22 a, an irradiation unit 23, a heat insulating material 24, a reflecting mirror 26, and an illumination 27. The configurations of the casing 21, the irradiation unit 23, and the heat insulating material 24 in the example shown in FIG. 10 are the same as those shown in FIG. The imaging unit 22 a is provided outside the casing 21 and images an area outside the opening 211 via the reflecting mirror 26. The image is transmitted to the display unit 3 by the imaging unit 22 a and the captured image is displayed on the display unit 3. The reflecting mirror 26 is provided inside the front end of the casing 21 and reflects an image of a region outside the opening 211 to the imaging unit 22a. The illumination 27 is a light source that illuminates a region outside the opening 211 imaged by the imaging unit 22a. According to the measurement unit 2 shown in FIG. 10, the remaining thickness of the stave 5 can be measured using the same measurement method as in the above embodiment. At this time, the operator can confirm the first and second insertion depths based on the captured image captured by the imaging unit 22 a displayed on the display unit 3.

  Furthermore, in the said embodiment, although it was set as the structure by which illumination is provided in the imaging means 221, this invention is not limited to this example. For example, the imaging unit 221 may not be provided with illumination. In this case, a high-sensitivity imaging mechanism capable of imaging even when the imaging region d is dark is used for the imaging unit 221.

  Furthermore, in the said embodiment, although the measurement part 2 was set as the structure which has the irradiation part 23, this invention is not limited to this example. For example, the irradiation unit 23 may not be provided in the measurement unit 2. In this case, the imaging unit 22 is fixed to the casing 21 so that an imaging region having a certain positional relationship with respect to the case and a direction substantially perpendicular to the longitudinal direction of the casing 21 can be captured. Note that whether or not the blast furnace stave remaining thickness measuring apparatus 1 has been inserted to the first and second insertion depths is determined according to the position in the captured image of the end of the stave 5 displayed in the captured image. . For example, the operator determines the depth at which the end of the stave 5 is displayed at a predetermined position such as the center of the captured image as the first and second insertion depths.

Furthermore, in the said embodiment, although the measurement part 2 was set as the structure which has the heat insulating material 24, this invention is not limited to this example. For example, if the measurement unit 2 is configured to withstand conditions such as the temperature in the stave 5, the heat insulating material 24 may not be provided.
Furthermore, in the said embodiment, although the measurement part 2 was set as the structure which has the pipe-shaped casing 21, this invention is not limited to this example. For example, as long as the imaging unit 22, the irradiation unit 23, and the like can be inserted into the measurement hole 7 without being bent, a configuration in which the casing 21 or the casing 21 of another shape is not provided may be used. In the case of a configuration in which the casing 21 is not provided, the measurement unit 25 is provided in the imaging unit 22 and the irradiation unit 23 so that an operator can visually recognize from the outside.

  Furthermore, in the said embodiment, although the measurement part 25 was taken as the scale, this invention is not limited to this example. The measurement unit 25 may be a display method or measurement method other than the scale as long as the insertion depth of the imaging unit 25 can be measured.

<Effect of embodiment>
(1) The blast furnace stave residual thickness measuring apparatus 1 according to an embodiment of the present invention has a length that can be inserted into the stave 5 provided inside the blast furnace from the outside of the blast furnace, and can image the inside of the stave 5 An imaging unit 22, a measuring unit 25 that measures the insertion depth of the imaging unit 22 into the stave 5, and a display unit 3 that displays the imaging result of the imaging unit 22.

  According to the above configuration, since the insertion depth of the blast furnace stave residual thickness measuring device 1 at the end of the stave 5 can be directly measured while confirming the image captured by the imaging unit 22, the remaining thickness of the stave 5 can be accurately determined. Can be measured. Further, for example, as compared with the case where the remaining thickness is measured using ultrasonic waves as in Patent Document 1, measurement is performed regardless of the influence of unevenness on the surface of the stave 5, the influence of the material of the stave 5, and the influence of the tolerance of the stave 5. Therefore, the measurement accuracy is superior to that of a measurement apparatus using ultrasonic waves.

  Moreover, according to the said structure, when measuring the remaining thickness of the stave 5, the blast furnace stave remaining thickness measuring apparatus 1 can be used repeatedly. Further, unlike Patent Document 2, there is no need to perform a process of embedding a marker in the stave 5 in advance. For this reason, compared with the measuring method and measuring apparatus described in Patent Document 2, the cost required for measurement and the cost required for manufacturing the stave 5 can be reduced, so that the remaining thickness can be measured at a low cost.

  Furthermore, according to the said structure, since the condition inside the blast furnace of the iron skin 4 which was not visually recognizable conventionally can be confirmed, an exact measurement position can be judged. For example, irregularities on the back side of the stave 5 caused by melting damage, etc., and irregularities or omissions on the front side of the stave 5 caused by melting damage or wear can be visually recognized. For this reason, the remaining thickness suitable for the life management of a blast furnace can be measured according to the state of the staves 5 such as melting and wear. On the other hand, when measuring the remaining thickness using ultrasonic waves as in Patent Document 1, since the state of the stave 5 such as melting or wear is unknown, it is not possible to measure an appropriate remaining thickness.

(2) It further has an irradiation unit 23 that has a length that can be inserted into the stave 5 and that irradiates the laser light L in a direction substantially perpendicular to the insertion direction into the stave 5.
According to the above configuration, since the relative positional relationship between the blast furnace stave residual thickness measuring apparatus 1 and the stave 5 can be visually recognized from the position irradiated with the laser beam L, the insertion of the blast furnace stave residual thickness measuring apparatus 1 is possible. The depth and the remaining thickness of the stave 5 can be measured with high accuracy.

(3) It further has a metal pipe-shaped casing 21, and the casing 21 has an opening 211 at the distal end side in the longitudinal direction, and the imaging unit 22 is arranged inside the casing 21 and passes through the opening 211. The imaging region d outside the casing 21 is imaged, and the measurement unit 25 is a scale provided on the surface of the casing 21.
(4) It further has a metal pipe-shaped casing 21, the casing 21 has an opening 211 at the front end side in the longitudinal direction, and the imaging unit 22 is arranged inside the casing 21 and passes through the opening 211. The imaging region d outside the casing 21 is imaged, the measuring unit 25 is a scale provided on the surface of the casing 21, and the irradiating unit 23 is arranged inside the casing 21, and from the casing 21 through the opening 211. Also, the laser beam L is irradiated to the outside.
According to the configurations of (3) and (4) above, the blast furnace stave residual thickness measuring apparatus 1 having excellent durability can be manufactured at low cost.

(5) A heat insulating material 24 is provided at the tip in the insertion direction to the stave 5.
According to the above configuration, it is possible to prevent the member of the blast furnace stave residual thickness measuring apparatus 1 such as the imaging unit 22 from being melted or broken due to the radiant heat in the blast furnace. For this reason, the durability of the blast furnace stave remaining thickness measuring apparatus 1 can be improved, and an inexpensive ready-made product having poor heat insulation can be applied to the members such as the imaging unit 22.

(6) The casing 21 has a size that can be inserted into the measurement hole 7 provided in the blast furnace.
According to the above configuration, the remaining thickness of the stave 5 can be measured by inserting the pressure gauge, the thermometer, or the like provided in the blast furnace into a measurement hole. For this reason, it is applicable also when measuring the remaining thickness of the stave 5 of the existing blast furnace. Further, compared to the case of forming the marker embedding hole as in Patent Document 2, it is not necessary to provide an unnecessary hole in the stave 5, so that the strength of the stave 5 can be improved.

(7) A method for measuring the remaining thickness of a blast furnace stave according to an embodiment of the present invention includes a step of inserting an imaging device (imaging unit 22) into a measurement hole 7 provided in the blast furnace, and a back surface of the stave 5 of the blast furnace. A step of measuring a first insertion depth which is an insertion depth when imaging the side end portion and a second insertion depth which is an insertion depth when the imaging device images the front side end portion of the stave 5 And a step of calculating the thickness of the stave 5 from the first insertion depth and the second insertion depth.
According to the said structure, the remaining thickness of the stave 5 can be measured correctly similarly to the structure of said (1).

1: Blast furnace stave residual thickness measuring device 2: Measuring unit 21: Casing 22: Imaging unit 221: Imaging unit 23: Laser pointer 231: Irradiating unit 24: Heat insulating material 25: Measuring unit 3: Display unit 4: Iron skin 5: Stave 51a, 51b, 51: Mountain part 52a, 52b, 52: Valley 6: Water channel 7: Measuring hole 8: Gap

Claims (7)

The stave has a length that can be inserted into a stave provided inside the blast furnace from the outside of the blast furnace and can reach the front side of the stave, and the interior of the stave is substantially perpendicular to the insertion direction of the stave. An imaging unit capable of imaging
A measurement unit for measuring the insertion depth of the imaging unit into the stave;
A display unit for displaying an imaging result of the imaging unit;
Blast furnace stave residual thickness measuring device having Has a front surface can reach side lengths of the insertable said staves from the outside of the blast furnace to the staves further have a radiation unit for irradiating a laser beam in a direction substantially perpendicular to the direction of insertion into the staves ,
The blast furnace stave residual thickness measuring apparatus according to claim 1, wherein the imaging unit images an imaging region including an irradiation region of the laser light . It further has a metal pipe-shaped casing,
The casing has an opening that opens in a direction orthogonal to the longitudinal direction on the distal end side in the longitudinal direction ,
The imaging unit is disposed inside the casing, images an imaging region outside the casing through the opening in a direction substantially perpendicular to the insertion direction ,
The blast furnace stave residual thickness measuring apparatus according to claim 1, wherein the measuring unit is a scale provided on a surface of the casing. It further has a metal pipe-shaped casing,
The casing has, on the distal end side in the longitudinal direction, an opening that opens in a direction perpendicular to the longitudinal direction ,
The imaging unit is disposed inside the casing, images an imaging region outside the casing through the opening in a direction substantially perpendicular to the insertion direction ,
The measuring unit is a scale provided on the surface of the casing,
The blast furnace stave residual thickness measuring apparatus according to claim 2, wherein the irradiation unit is arranged inside the casing and irradiates the laser beam to the outside of the casing through the opening.   The blast furnace stave residual thickness measuring apparatus according to claim 3 or 4, wherein the casing has a heat insulating material at a tip on the opening side.   The blast furnace stave residual thickness measuring apparatus according to any one of claims 3 to 5, wherein the casing has a size that can be inserted into a measurement hole provided in the blast furnace. Inserting an imaging device into a measurement hole provided in the blast furnace;
A step of measuring a first insertion depth, which is an insertion depth when the imaging device images the rear side end of the blast furnace stave in a direction substantially perpendicular to the insertion direction of the imaging device; A step of measuring a second insertion depth that is an insertion depth when the imaging device images the front side end of the stave in a direction substantially perpendicular to the insertion direction of the imaging device ;
Calculating the thickness of the stave from the difference between the first insertion depth and the second insertion depth;
Including blast furnace stave residual thickness measurement method.

Images