Device and method for detecting residual thickness of hearth eroded carbon brick

Abstract

The invention discloses a hearth erosion carbon brick residual thickness detection device and method, and relates to the field of thickness measurement. The hearth erosion carbon brick residual thickness detection device comprises a guide disc, a bullet launching tube, an energy wave receiving tube, a tail fixing disc, a bullet launcher and an energy wave detector, wherein the bullet launching tube and the energy wave receiving tube can penetrate through the guide disc and are connected to the guide disc; the bullet launching tube and the energy wave receiving tube can be sleeved with the tail fixing disc; the bullet launcher is used for launching bullets at a preset speed to penetrate through the bullet launching tube to impact the carbon brick, and the energy wave detector is connected with an energy wave receiving head capable of penetrating through the energy wave receiving tube to be attached to the carbon brick through a wire. According to the hearth erosion carbon brick residual thickness detection device and method provided by the invention, the bullet is launched to impact the outer wall of the carbon brick to generate the energy wave, and the erosion condition of the carbon brick is judged and the erosion thickness is calculated by detecting the time when the energy wave is transmitted to the inner wall of the carbon brick, so that a blast furnace is guided to monitor the safety condition of the hearth and adjust the operation; and the service life of the hearth is prolonged.

Description

Technical Field

[0001] The present application relates to the field of thickness measurement, and in particular to a device and method for detecting the remaining thickness of furnace hearth erosion carbon bricks. Background Art

[0002] The blast furnace hearth is a key device for holding molten iron and slag in the blast furnace. The material that directly contacts the molten iron is carbon bricks. Once the blast furnace is put into use, the carbon bricks need to be eroded and washed by the high-temperature flowing slag for a long time. Therefore, the monitoring of the erosion of carbon bricks in the hearth has become the core technology for the safety and longevity of the blast furnace. Under the existing technical conditions, it is difficult to directly measure and evaluate the residual thickness of carbon bricks during the use of the hearth.

[0003] The traditional method for measuring the thickness of carbon bricks in the blast furnace hearth is to bury thermocouples at different depths in the carbon bricks at the beginning of the blast furnace design, and to calculate the remaining thickness of the residual bricks in the blast furnace hearth by the buried position of the thermocouples and the temperature difference with the assumed point. However, the thermocouples are difficult to maintain after use and cannot be repaired after being corroded. At the same time, the buried cable trough is prone to gas leakage, etc., resulting in the loss of most of the thermocouples in the hearth in the later stage of the furnace service, or the measurement data is wrong and distorted, which ultimately leads to a large error in the residual thickness assessment of the hearth of 15 to 30 cm, making it difficult to ensure the safe and stable production of the blast furnace. Summary of the invention

[0004] The purpose of the present application is to provide a device and method for detecting the remaining thickness of carbon bricks eroded by furnace hearth, which generates energy waves by firing bullets to hit the outer wall of carbon bricks, and judges the erosion of carbon bricks and calculates the erosion thickness by detecting the time it takes for the energy waves to propagate to the inner wall of the carbon bricks and return, thereby guiding the blast furnace to monitor the safety status of the furnace hearth and adjust operations, so as to achieve the purpose of extending the life of the furnace hearth.

[0005] This application is implemented as follows:

[0006] The present application provides a device for detecting the remaining thickness of carbon bricks eroded by a furnace cylinder, which includes a guide plate, a bullet launching tube and an energy wave receiving tube which can respectively pass through and be connected to the guide plate, a tail fixing plate which can be sleeved on the bullet launching tube and the energy wave receiving tube, a bullet launcher and an energy wave detector. The bullet launcher is used for launching a bullet of a predetermined speed through the bullet launching tube to hit the carbon bricks, and the energy wave detector is connected to an energy wave receiving head which can pass through the energy wave receiving tube and fit the carbon bricks through a wire.

[0007] In some optional embodiments, a measuring tube which can penetrate the furnace shell, the cooling wall and the ramming material layer and press the carbon bricks is further included, and the guide plate is configured to pass through the measuring tube and press the carbon bricks.

[0008] In some optional embodiments, one end of the measuring tube extending out of the furnace shell is provided with a sealing flange for detachably connecting to the tail fixing plate.

[0009] In some optional embodiments, the sealing flange is detachably connected to a sealing cover plate for closing the measuring tube.

[0010] In some optional embodiments, the bullet launching tube is composed of a plurality of launching tube units connected by a first extension knot.

[0011] In some optional embodiments, the energy wave receiving tube is composed of a plurality of receiving tube units connected by a second extension junction.

[0012] The present application also provides a method for detecting the remaining thickness of furnace hearth erosion carbon bricks, which comprises the following steps:

[0013] A measuring channel connected to the carbon bricks is provided in the furnace shell of the blast furnace;

[0014] The guide plate is passed through the measuring channel to press against the carbon bricks, so that the bullet launching tube and the energy wave receiving tube passing through and connected to the guide plate press against the carbon bricks;

[0015] Use a bullet launcher to launch a bullet of a predetermined speed through a bullet launch tube to hit the carbon brick, and use an energy wave receiving head to pass through an energy wave receiving tube to fit the carbon brick to receive the energy wave signal of the carbon brick and feed it back to an energy wave detector;

[0016] The thickness of the carbon brick is calculated based on the energy wave signal of the carbon brick.

[0017] In some optional embodiments, the measuring channel is located within a range of 1.5-2.5 m below the iron mouth of the blast furnace, and / or the measuring channel is located between two cooling walls.

[0018] In some optional embodiments, when the blast furnace is shut down or the iron mouth is blocked, a bullet launcher is used to launch bullets of a predetermined speed through a bullet launch tube to hit the carbon bricks.

[0019] In some optional implementation schemes, the thickness of the carbon brick is calculated based on the energy wave signal of the carbon brick using the following formula: Wherein, L is the thickness of the carbon brick; υ is the propagation speed of the energy wave in the carbon brick; N is the sum of the number of signals measured after the energy wave is emitted from the carbon brick erosion surface and then bounces back to the outer wall of the carbon brick; t1, t2, t3…tN is the total time of the signals measured after the energy wave is emitted from the carbon brick erosion surface and then bounces back to the outer wall of the carbon brick.

[0020] The beneficial effects of the present application are as follows: the device for detecting the remaining thickness of carbon bricks eroded by the furnace provided by the present application comprises a guide plate, a bullet launching tube and an energy wave receiving tube which can pass through and be connected to the guide plate respectively, a tail fixing plate which can be sleeved on the bullet launching tube and the energy wave receiving tube, a bullet launcher and an energy wave detector, the bullet launcher is used to launch a bullet of a predetermined speed through the bullet launching tube to hit the carbon bricks, and the energy wave detector is connected to an energy wave receiving head which can pass through the energy wave receiving tube and fit the carbon bricks through a wire. The device and method for detecting the remaining thickness of carbon bricks eroded by the furnace provided by the present application generates energy waves by launching bullets to hit the outer wall of the carbon bricks, and judges the erosion of the carbon bricks and calculates the erosion thickness by detecting the time it takes for the energy wave to propagate to the inner wall of the carbon bricks and return, thereby guiding the blast furnace to monitor the safety status of the furnace and adjust the operation, so as to achieve the purpose of extending the life of the furnace. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] In order to more clearly illustrate the technical solutions of the embodiments of the present application, the drawings required for use in the embodiments will be briefly introduced below. It should be understood that the following drawings only show certain embodiments of the present application and therefore should not be regarded as limiting the scope. For ordinary technicians in this field, other related drawings can be obtained based on these drawings without paying creative work.

[0022] Figure 1 A partial cross-sectional structural schematic diagram of a device for detecting the remaining thickness of carbon bricks eroded by a furnace provided in an embodiment of the present application;

[0023] Figure 2 For along Figure 1 Schematic diagram of the cross-sectional structure of the AA section line;

[0024] Figure 3 A schematic diagram of a structure in which a measuring channel is opened between the cooling walls of a furnace shell in a method for detecting the remaining thickness of carbon bricks eroded by a furnace shell provided in an embodiment of the present application;

[0025] Figure 4 A schematic diagram of the structure of a measuring tube, a sealing flange and a sealing cover plate in a device for detecting the remaining thickness of carbon bricks eroded by furnace cylinders, after a measuring channel is opened on a furnace shell in a method for detecting the remaining thickness of carbon bricks eroded by furnace cylinders provided in an embodiment of the present application;

[0026] Figure 5 A schematic diagram of the cross-sectional structure after a measuring tube, a sealing flange and a sealing cover plate in a device for detecting the remaining thickness of carbon bricks eroded by furnace cylinders are installed after a measuring channel is opened on a furnace shell in a method for detecting the remaining thickness of carbon bricks eroded by furnace cylinders provided in an embodiment of the present application;

[0027] Figure 6A schematic diagram of the cross-sectional structure of the method for detecting the remaining thickness of carbon bricks eroded by furnace cylinder provided in an embodiment of the present application, in which a measuring channel is opened on the furnace shell and a device for detecting the remaining thickness of carbon bricks eroded by furnace cylinder is installed to detect the thickness of carbon bricks.

[0028] In the figure: 100, guide plate; 110, bullet launching tube; 111, launching tube unit; 112, first extension knot; 120, energy wave receiving tube; 121, receiving tube unit; 122, second extension knot; 130, tail fixing plate; 140, bullet launcher; 150, energy wave detector; 160, wire; 170, energy wave receiving head; 180, bullet; 200, furnace shell; 210, cooling wall; 220, ramming material layer; 230, carbon brick; 240, measuring tube; 250, sealing flange; 260, sealing cover plate; 270, measuring channel; 280, cooling water pipe. DETAILED DESCRIPTION

[0029] In order to make the purpose, technical solution and advantages of the embodiments of the present application clearer, the technical solution in the embodiments of the present application will be clearly and completely described below in conjunction with the drawings in the embodiments of the present application. Obviously, the described embodiments are part of the embodiments of the present application, rather than all the embodiments. The components of the embodiments of the present application described and shown in the drawings here can be arranged and designed in various different configurations.

[0030] Therefore, the following detailed description of the embodiments of the present application provided in the accompanying drawings is not intended to limit the scope of the present application for which protection is sought, but merely represents selected embodiments of the present application. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in the field without creative work are within the scope of protection of the present application.

[0031] It should be noted that similar reference numerals and letters denote similar items in the following drawings, and therefore, once an item is defined in one drawing, further definition and explanation thereof is not required in subsequent drawings.

[0032] In the description of the present application, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc. indicate positions or positional relationships based on the positions or positional relationships shown in the accompanying drawings, or the positions or positional relationships in which the product of the application is usually placed when in use. They are only for the convenience of describing the present application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific position, be constructed and operated in a specific position, and therefore cannot be understood as a limitation on the present application. In addition, the terms "first", "second", "third", etc. are only used to distinguish the description, and cannot be understood as indicating or implying relative importance.

[0033] In addition, the terms "horizontal", "vertical", "overhanging" and the like do not mean that the components are required to be absolutely horizontal or overhanging, but can be slightly tilted. For example, "horizontal" only means that its direction is more horizontal than "vertical", and does not mean that the structure must be completely horizontal, but can be slightly tilted.

[0034] In the description of this application, it should also be noted that, unless otherwise clearly specified and limited, the terms "set", "install", "connect", and "connect" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of two elements. For ordinary technicians in this field, the specific meanings of the above terms in this application can be understood according to specific circumstances.

[0035] In the present application, unless otherwise clearly specified and limited, a first feature being "above" or "below" a second feature may include that the first and second features are in direct contact, or may include that the first and second features are not in direct contact but are in contact through another feature between them. Moreover, a first feature being "above", "above" and "above" a second feature includes that the first feature is directly above and obliquely above the second feature, or simply indicates that the first feature is higher in level than the second feature. A first feature being "below", "below" and "below" a second feature includes that the first feature is directly below and obliquely below the second feature, or simply indicates that the first feature is lower in level than the second feature.

[0036] The features and performances of the device and method for detecting the remaining thickness of carbon bricks eroded by furnace hearth of the present application are further described in detail below in conjunction with the embodiments.

[0037] like Figure 1 and Figure 2As shown, an embodiment of the present application provides a device for detecting the remaining thickness of carbon bricks eroded by a furnace cylinder, which includes a guide plate 100, a bullet launching tube 110 that can pass through and be connected to the guide plate 100, an energy wave receiving tube 120 that can pass through and be connected to the guide plate 100, a tail fixing plate 130 that can be sleeved on the bullet launching tube 110 and the energy wave receiving tube 120, a bullet launcher 140, an energy wave detector 150 and a measuring tube 240, wherein the measuring tube 240 is configured to penetrate the furnace shell 200, the cooling wall 210 and the ramming material layer 220 and then press against the outer wall of the carbon brick 230, and the guide plate 100 is configured to penetrate the measuring tube 240 and press against the carbon brick 230, and the bullet launcher 140 is used to launch a bullet of a predetermined speed through the bullet launching tube 110 to hit the outer wall of the carbon brick 230 The energy wave detector 150 is connected to an energy wave receiving head 170 which can pass through the energy wave receiving tube 120 and fit the outer wall of the carbon brick 230 through a wire 160. One end of the measuring tube 240 extending out of the furnace shell 200 is provided with a sealing flange 250 which is detachably connected to the tail fixing plate 130 through bolts. The sealing flange 250 is detachably connected to a sealing cover plate 260 for closing the measuring tube 240 through bolts. The bullet launching tube 110 is composed of three launching tube units 111 which are connected in sequence through two first extension knots 112. The energy wave receiving tube 120 is composed of three receiving tube units 121 which are connected through two second extension knots 122. In this embodiment, the guide plate 100 is provided with two through holes for the bullet launching tube 110 and the energy wave receiving tube 120 to pass through.

[0038] like Figure 1 , Figure 2 , Figure 3 , Figure 4 , Figure 5 and Figure 6 As shown, the embodiment of the present application also provides a method for detecting the remaining thickness of furnace erosion carbon bricks, which is performed using the above-mentioned furnace erosion carbon brick remaining thickness detection device, and includes the following steps:

[0039] Step 1: Arrangement of the measuring channel 270 for residual thickness detection of the carbon brick 230 of the blast furnace hearth; a measuring channel 270 connected to the carbon brick 230 is opened in the furnace shell 200 of the blast furnace. To ensure that the detection point of the carbon brick 230 is located below the iron mouth, the internal water channel of the cooling stave 210 is not damaged during processing, and the size of the measuring channel 270 meets the measurement requirements, the measuring channel 270 is required to be located within 1.5-2.5m below the iron mouth of the blast furnace, the inner diameter of the inserted measuring tube 240 is ≥60mm, and the outer diameter is ≤80mm. Each measuring channel 270 is located between two cooling staves 210. 0, the measuring channel 270 is required to pass through the furnace shell 200, the cooling wall 210, the ramming material layer 220 and then connect to the outer wall of the carbon brick 230, the front end of the measuring channel 270 directly reaches the cold surface of the outer wall of the carbon brick 230 of the furnace, the measuring tube 240 is inserted into the measuring channel 270 and pressed against the cold surface of the outer wall of the carbon brick 230, the end of the measuring tube 240 extending out of the furnace shell 200 is connected to the sealing cover plate 260 through the sealing flange 250 for sealing, and the intersection of the measuring tube 240 and the furnace shell 200 is sealed by welding, and the furnace shell 200 can select 3-10 points to set the channel.

[0040] Step 2: Connect the three launch tube units 111 in sequence through the two first extension knots 112 to form a bullet launch tube 110, connect the three receiving tube units 121 through the two second extension knots 122 to form an energy wave receiving tube 120, pass the bullet launch tube 110 and the energy wave receiving tube 120 through and connect them to the two through holes on the guide plate 100 respectively, sleeve the tail fixing plate 130 on the end of the bullet launch tube 110 and the energy wave receiving tube 120 away from the guide plate 100, and extend the measuring tube 240 out of the end of the furnace shell 200. The sealing cover plate 260 of the end closed sealing flange 250 is disassembled to open the measuring tube 240, and then the guide plate 100 is passed through the measuring tube 240 to press against the outer wall of the carbon brick 230, and the tail fixed plate 130 is connected to the sealing flange 250 extending out of the furnace shell 200 through bolts to the measuring tube 240, and the bullet launcher 140 is connected to the end of the bullet launching tube 110 extending out of the measuring tube 240, and the energy wave receiving head 170 connected to the energy wave detector 150 through the wire 160 passes through the energy wave receiving tube 120 and fits the outer wall of the carbon brick 230.

[0041] Step 3: Detect the thickness of carbon bricks in the furnace when the blast furnace is shut down or the iron mouth is blocked; after setting the speed of the bullet launcher 140 to launch bullets, use the bullet launcher 140 to launch bullets of a predetermined speed through the bullet launch tube 110 to hit the carbon brick 230, use the energy wave receiving head 170 to pass through the energy wave receiving tube 120 to fit the carbon brick 230 to receive the total time of the energy wave of the carbon brick 230 from the time it is emitted to the erosion surface of the carbon brick 230 and then rebounded, and feed it back to the energy wave detector 150, repeat the above measurement process N times, and obtain the total time of each signal, which is t1, t2, t3...tN respectively;

[0042] Step 4: Calculate the thickness of the carbon brick 230 using the following formula based on the energy wave signal received by the carbon brick 230: Wherein, L is the thickness of the carbon brick; υ is the propagation speed of the energy wave in the carbon brick; N is the sum of the number of each signal after the energy wave is measured from the emission to the erosion surface of the carbon brick and then rebounds back to the outer wall of the carbon brick; t1, t2, t3…tN is the total time of each signal after the energy wave is measured from the emission to the erosion surface of the carbon brick and then rebounds back to the outer wall of the carbon brick. In this embodiment, υ is the propagation speed of the energy wave in the standard carbon brick, the length of the standard carbon brick is ≥100cm, and the width and height of the standard carbon brick are ≥50cm.

[0043] The embodiment of the present application provides a device and method for detecting the residual thickness of carbon bricks eroded by furnace hearth. A measuring channel 270 is opened at the easily eroded part of the carbon brick 230 below the iron mouth of the furnace hearth of the blast furnace, and a bullet launcher 140 is used to launch a bullet 180 through the measuring channel 270 to hit the carbon brick 230. The total time of each signal after the impact energy wave is emitted from the carbon brick 230 to the eroded surface of the carbon brick 230 and then rebounds back to the outer wall of the carbon brick is measured, thereby accurately measuring the thickness of the eroded carbon brick 230, thereby guiding the blast furnace to monitor the safety status and adjust the operation of the furnace hearth, so as to achieve the purpose of extending the life of the furnace hearth. The residual thickness of the carbon brick 230 can be accurately measured without damaging the carbon brick 230 and the cooling wall 210, and has the advantages of good stability and high reliability.

[0044] The reason why the measuring channel 270 for the residual thickness of the furnace carbon bricks is processed within the range of 1.5-2.5m below the iron mouth is that the easily corroded part of the carbon bricks 230 is located within this height range; the reason why the inner diameter of the measuring tube 240 passing through the measuring channel 270 is ≥60mm is to keep enough space to insert the energy wave receiving head 170 of the energy wave detector 150 and reserve the bullet launching tube 110 for the bullet 180 to pass through for measurement; the reason why the outer diameter of the measuring tube 240 passing through the measuring channel 270 is ≤80mm and It is located between two cooling walls 210 to avoid penetrating the cooling water pipe 280 in the cooling wall 210; the measuring channel 270 passes through the furnace shell 200, the cooling wall 210, and the ramming material layer 220 directly to the cold surface of the carbon brick 230 to avoid too much spacing material being easily interfered by the signal of other interlayer materials; the end of the measuring tube 240 extending out of the furnace shell 200 is sealed by connecting the sealing cover plate 260 with a sealing flange 250, which can prevent the high-pressure gas from escaping from the measuring tube 240 in the measuring channel 270 during the production process.

[0045] The guide plate 100 is arranged to fix the bullet launching tube 110 and the energy wave receiving tube 120 so that the heads of the bullet launching tube 110 and the energy wave receiving tube 120 can be closely attached to the cold surface of the carbon brick 230, and the bullet can be effectively guided to hit the cold surface of the carbon brick 230 through the bullet launching tube 110, and the energy wave receiving tube 120 can prevent the wire 160 connected to the energy wave receiving head 170 from being entangled in the measuring tube 240; the bullet launching tube 110 is composed of three launching tube units 111 connected in sequence by two first extension nodes 112, and the energy wave receiving tube 120 is composed of three receiving tube units Element 121 is connected by two second extension nodes 122. This is because the external space of the furnace is limited. When the bullet launching tube 110 and the energy wave receiving tube 120 are too long and the working space is insufficient, the length can be easily adjusted. A tail fixing plate 130 is sleeved on the end of the bullet launching tube 110 and the energy wave receiving tube 120 away from the guide plate 100, which can ensure the stable operation of the bullet launching tube 110 and the energy wave receiving tube 120. By adjusting the speed level of the bullet 180 launched by the bullet launcher 140, it can be ensured that the carbon brick 230 has a fixed and appropriate energy wave rebound.

[0046] Measuring the thickness when the blast furnace is shut down or the iron mouth is blocked can avoid the vibration during production that affects the measurement results; repeating the measurement N times when the thickness of the carbon brick 230 is calculated using a formula based on the energy wave signal received by the carbon brick 230 can ensure the validity and accuracy of the measurement results. υ is the propagation speed of the energy wave in the standard carbon brick, because the size of the measured carbon brick is close to that of the standard carbon brick, which ensures the validity of the measurement data.

[0047] Measuring channels 270 were opened at 1.5m, 2m and 2.5m below the iron mouth of a blast furnace. The thicknesses of the furnace carbon bricks 230 detected by using the above-mentioned hearth erosion carbon brick remaining thickness detection device and the above-mentioned hearth erosion carbon brick remaining thickness detection method were 1089mm, 917mm and 1134mm respectively. Compared with the actual thickness of the furnace carbon bricks 230, the measurement accuracy was ≤10cm, indicating that the furnace carbon brick remaining thickness detection device and method provided in the present application can effectively ensure the safe production of the furnace.

[0048] The embodiments described above are part of the embodiments of the present application, rather than all of the embodiments. The detailed description of the embodiments of the present application is not intended to limit the scope of the present application for protection, but merely represents the selected embodiments of the present application. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present application.

Claims

1. A device for detecting the remaining thickness of carbon bricks eroded by furnace, characterized in that: It includes a guide plate, a bullet launching tube and an energy wave receiving tube which can pass through and be connected to the guide plate respectively, a tail fixing plate which can be sleeved on the bullet launching tube and the energy wave receiving tube, a bullet launcher and an energy wave detector. The bullet launcher is used to launch a bullet of a predetermined speed through the bullet launching tube to hit the carbon bricks. The energy wave detector is connected to an energy wave receiving head which can pass through the energy wave receiving tube and fit the carbon bricks through a wire.

2. The device for detecting the remaining thickness of carbon bricks eroded by furnace according to claim 1 is characterized in that: It also includes a measuring tube that can penetrate the furnace shell, the cooling wall and the ramming material layer and then press the carbon bricks. The guide plate is configured to pass through the measuring tube and press the carbon bricks.

3. The device for detecting the remaining thickness of carbon bricks eroded by furnace according to claim 2 is characterized in that: One end of the measuring tube extending out of the furnace shell is provided with a sealing flange for detachably connecting with the tail fixing plate.

4. The device for detecting the remaining thickness of carbon bricks eroded by furnace according to claim 3 is characterized in that: The sealing flange is detachably connected to a sealing cover plate for closing the measuring tube.

5. The device for detecting the remaining thickness of carbon bricks eroded by furnace according to claim 1 is characterized in that: The bullet launching tube is composed of a plurality of launching tube units connected by a first extension knot.

6. The device for detecting the remaining thickness of carbon bricks for furnace corrosion according to claim 1 is characterized in that: The energy wave receiving tube is composed of a plurality of receiving tube units connected by a second extension junction.

7. A method for detecting the remaining thickness of carbon bricks eroded by furnace, characterized in that: It includes the following steps: A measuring channel connected to the carbon bricks is provided in the furnace shell of the blast furnace; The guide plate is passed through the measuring channel to press against the carbon bricks, so that the bullet launching tube and the energy wave receiving tube passing through and connected to the guide plate press against the carbon bricks; Use a bullet launcher to launch a bullet of a predetermined speed through the bullet launch tube to hit the carbon brick, and use an energy wave receiving head to pass through the energy wave receiving tube to fit the carbon brick to receive the energy wave signal of the carbon brick and feed it back to the energy wave detector; The thickness of the carbon brick is calculated according to the energy wave signal of the carbon brick.

8. The method for detecting the remaining thickness of carbon bricks caused by furnace corrosion according to claim 7 is characterized in that: The measuring channel is located within a range of 1.5-2.5 m below the iron mouth of the blast furnace, and / or the measuring channel is located between two cooling walls.

9. The method for detecting the remaining thickness of carbon bricks caused by furnace corrosion according to claim 7, characterized in that: When the blast furnace is shut down or the iron mouth is blocked, a bullet launcher is used to launch bullets of a predetermined speed through the bullet launch tube to impact the carbon bricks.

10. The method for detecting the remaining thickness of carbon bricks caused by furnace corrosion according to claim 7, characterized in that: The thickness of the carbon brick is calculated according to the energy wave signal of the carbon brick using the following formula: Wherein, L is the thickness of the carbon brick; υ is the propagation speed of the energy wave in the carbon brick; N is the sum of the number of signals measured after the energy wave is emitted from the carbon brick erosion surface and then bounces back to the outer wall of the carbon brick; t1, t2, t3…tN is the total time of the signals measured after the energy wave is emitted from the carbon brick erosion surface and then bounces back to the outer wall of the carbon brick.

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