Blast furnace iron runner dismantling device and repairing method thereof

Abstract

The invention belongs to the technical field of ironmaking, and discloses a blast furnace iron runner dismantling device and a repairing method thereof.The dismantling device comprises a drill bit and a driving mechanism, the drill bit comprises a drill body, cutting parts and an alloy tool bit, the multiple cutting parts are annularly and evenly distributed on the periphery of the drill body, and the cutting parts are spirally wound around the periphery of the drill body; alloy tool bits are arranged on the sides, away from the drill body, of the cutting parts; the driving mechanism is in transmission connection with the drill body so as to drive the alloy tool bit to rotationally cut a working layer of the blast furnace iron runner. According to the dismantling device, the driving mechanism drives the drill bit to rotate, so that the alloy tool bits wound on the cutting parts on the periphery of the drill body can efficiently cut a working layer of the iron runner, the cutting efficiency and the cutting precision are high, it is guaranteed that the working layer is effectively dismantled, meanwhile, the influence of deformation and damage caused by knocking on the overall structure of the iron runner is reduced, and the work efficiency is improved. Therefore, the service life and the use safety of the whole structure of the iron runner are ensured.

Description

Technical Field

[0001] The present invention relates to the technical field of ironmaking, and particularly relates to a blast furnace trough demolition device and a repair method thereof. Background Art

[0002] The blast furnace tapping trough is an essential passage for blast furnace tapping and an important facility in the ironmaking production process. The safety and reliability of the tapping trough system are the prerequisite for ensuring the normal smelting of the blast furnace.

[0003] The blast furnace tapping trough mainly includes a hearth hardening layer, a steel shell layer, a heat insulation layer, a refractory brick layer, and a working layer from the inside out. The working layer is usually made of castable and is directly used to contact molten slag and molten iron. After the blast furnace tapping trough works for a period of time, the working layer on the side wall and bottom of the blast furnace tapping trough will be eroded to a certain extent. To ensure the operation safety of the blast furnace tapping trough, the eroded working layer needs to be repaired. Currently, usually, the furnace front technicians drain the molten iron in the blast furnace tapping trough through the residual iron hole regularly, and use a breaker excavator to knock on the working layer to demolish the working layer and then re-cast. The prior art has the following defects: The repeated knocking of the breaker excavator has a high intensity, and the knocking force is likely to cause deformation or damage to the steel shell layer, heat insulation layer, and refractory brick layer, affecting the service life and tapping safety of the blast furnace tapping trough. Summary of the Invention

[0004] The purpose of the present invention is to provide a blast furnace trough demolition device and a repair method thereof, which have a simple structure, convenient operation, and stable and smooth demolition of the working layer.

[0005] To achieve this purpose, the present invention adopts the following technical solutions:

[0006] In a first aspect, a blast furnace trough demolition device is provided, including a drill bit and a driving mechanism. The drill bit includes a drill body, a cutting part, and an alloy tool bit. A plurality of the cutting parts are annularly and evenly arranged on the outer periphery of the drill body, and the cutting parts are spirally wound around the outer periphery of the drill body. The alloy tool bit is arranged on the side of the cutting part away from the drill body; the driving mechanism is in transmission connection with the drill body to drive the alloy tool bit to rotate and cut the working layer of the blast furnace trough.

[0007] As a preferred solution of the blast furnace trough demolition device, a plurality of the alloy tool bits are spaced apart on each of the cutting parts. The alloy tool bit includes an alloy body and a cutting head protruding from the alloy body. The alloy body is detachably connected to the cutting part, and the cutting head can scrape the working layer.

[0008] As a preferred embodiment of the blast furnace runner demolition device, an air inlet passage is provided inside the drill body. An air outlet hole is provided on the side of the cutting part away from the drill body, and the air outlet hole is located between two adjacent alloy cutter heads. The air outlet hole communicates with the air inlet passage, and the air inlet passage is connected to an external air source.

[0009] As a preferred embodiment of the blast furnace runner demolition device, by mass fraction, the drill body and / or the cutting part contain the following components: titanium carbide: 55%-70%, iron: 25%-35%, molybdenum carbide: 1%-15%, vanadium carbide: 1%-5%.

[0010] As a preferred embodiment of the blast furnace runner demolition device, the connection between the cutting part and the drill body is provided with a circular arc transition; and / or,

[0011] The spiral angle of the cutting part is θ, and 12° ≤ θ ≤ 18°.

[0012] In a second aspect, a method for repairing a blast furnace runner is provided. Using the above blast furnace runner demolition device, the method includes the following steps:

[0013] S10. Close the tapping hole of the blast furnace and clean the remaining materials in the runner.

[0014] S20. Measure the maximum wear depth H of the working layer of the runner, and mark the erosion line of the entire working layer based on the maximum wear depth H.

[0015] S30. Use the drive mechanism of the blast furnace runner demolition device to drive the drill bit to rotate, so that the drill bit grinds the working layer until the working layer is ground flat to the erosion line.

[0016] S40. Install a casting mold corresponding to the shape and size of the runner, pour casting material between the remaining working layer and the casting mold, and wait for drying and shaping, then remove the mold to form a complete working layer.

[0017] As a preferred embodiment of the method for repairing a blast furnace runner, the blast furnace has multiple tapping holes to connect multiple runners. Before step S10, according to the monitoring results of the erosion amount of the working layer of each runner, determine to repair a specified runner, close the tapping hole corresponding to the runner, and keep the operation of the remaining tapping holes and runners.

[0018] As a preferred embodiment of the method for repairing a blast furnace runner, in step S30, the working layer outside the erosion line should be evenly divided into multiple demolition areas along its own length direction according to (1.2 - 1.7)D according to the diameter D of the drill bit, and the drive mechanism drives the drill bit to grind the demolition areas section by section.

[0019] As a preferred solution of the blast furnace trough repair method, step S30 specifically includes the following steps:

[0020] S301. The driving mechanism drives the drill bit to polish the surface of the working layer at 1000-1500 r / min until it is adjacent to the erosion line;

[0021] S302. The driving mechanism drives the drill bit to continue polishing the working layer at 200-300 r / min until the working layer is polished flat to the erosion line.

[0022] As a preferred solution of the blast furnace trough repair method, in step S40, for the depth H of the trough, when the mold is removed, 40%H-60%H of wood is placed into the trough, and after covering it with a hood having ventilation holes, the wood is ignited for baking.

[0023] Advantages of the present invention: The driving mechanism drives the drill bit to rotate, so that the alloy cutter heads on the plurality of cutting parts wound around the outer periphery of the drill body can efficiently cut the working layer of the trough, with high cutting efficiency and cutting accuracy. While ensuring the effective removal of the working layer, it reduces the influence of deformation and damage caused by knocking on the overall structure of the trough, thereby ensuring the service life and use safety of the overall structure of the trough; through the application of alloy cutter heads, the wear resistance of the drill bit is effectively enhanced, and it can maintain stable operation for a long time in a high-strength and high-hardness environment to ensure the service life of the drill bit; by winding and arranging a plurality of cutting parts around the outer periphery of the drill body, it helps to evenly distribute the cutting force of the drill bit, reduce local overheating or damage, and improve the safety and reliability of the removal process. Description of the Drawings

[0024] The present invention will be further described in detail below with reference to the drawings and embodiments.

[0025] Figure 1 is a schematic structural diagram of the blast furnace trough demolition device according to an embodiment of the present invention;

[0026] Figure 2 is a schematic structural diagram of the drill bit according to an embodiment of the present invention;

[0027] Figure 3 is a schematic flow diagram of the blast furnace trough repair method according to an embodiment of the present invention;

[0028] Figure 4 is a cross-sectional view of the blast furnace trough according to an embodiment of the present invention.

[0029] In the figure:

[0030] 100. Erosion line;

[0031] 1. Drill bit; 11. Drill body; 12. Cutting part; 13. Cemented carbide cutting head; 131. Cemented carbide body; 132. Cutting tip; 2. Driving mechanism; 3. Tapping hole; 4. Runner; 41. Main runner; 42. Iron runner; 43. Slag-iron runner; 5. Working layer; 6. Hearth hardening layer; 7. Steel shell layer; 8. Heat insulation layer; 9. Refractory brick layer. Detailed implementation mode

[0032] The present invention will be further described in detail below with reference to the accompanying drawings and embodiments. It can be understood that the specific embodiments described herein are only used to explain the present invention, rather than limiting the present invention. In addition, it should be noted that for the sake of description, only the parts related to the present invention are shown in the drawings, rather than all the structures.

[0033] In the description of the present invention, unless otherwise clearly defined and limited, the terms "connected", "connected", and "fixed" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or integrated; it can be a mechanical connection or an electrical connection; it can be directly connected, or indirectly connected through an intermediate medium, and it can be the internal communication of two components or the interaction relationship between two components. For those of ordinary skill in the art, the specific meanings of the above terms in the present invention can be understood according to specific situations.

[0034] In the present invention, unless otherwise clearly defined and limited, the first feature being "above" or "below" the second feature may include direct contact between the first and second features, or may include that the first and second features are not in direct contact but in contact through other features therebetween. Moreover, the first feature being "above", "over" and "on" the second feature includes that the first feature is directly above and obliquely above the second feature, or merely means that the first feature is at a higher horizontal height than the second feature. The first feature being "below", "under" and "beneath" the second feature includes that the first feature is directly below and obliquely below the second feature, or merely means that the first feature is at a lower horizontal height than the second feature.

[0035] In the description of this embodiment, the orientation or positional relationships such as "above", "below", "right", etc. are based on the orientation or positional relationships shown in the drawings, and are only for the convenience of description and simplifying the operation, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation of the present invention. In addition, the terms "first" and "second" are only used for distinction in description and have no special meaning.

[0036] Such as Figure 1 And Figure 2As shown, the blast furnace iron groove removal device of the embodiment of the present invention includes a drill bit 1 and a driving mechanism 2. The drill bit 1 includes a drill body 11, a cutting portion 12 and an alloy cutter head 13. A plurality of cutting portions 12 are evenly distributed in an annular shape on the outer periphery of the drill body 11, and the cutting portion 12 is spirally wound on the outer periphery of the drill body 11. The alloy cutter head 13 is arranged on the side of the cutting portion 12 away from the drill body 11; the driving mechanism 2 is transmission-connected to the drill body 11 to drive the alloy cutter head 13 to rotate and cut the working layer 5 of the blast furnace iron groove 4.

[0037] It can be understood that the driving mechanism 2 drives the drill bit 1 to rotate, so that the alloy cutter heads 13 on the cutting parts 12 wound around the outer periphery of the drill body 11 can efficiently cut the working layer 5 of the iron groove 4, with high cutting efficiency and cutting accuracy, ensuring the effective removal of the working layer 5 while reducing the impact of the overall structure of the iron groove 4 on the deformation and damage caused by the knocking, thereby ensuring the service life and safety of the overall structure of the iron groove 4; through the application of the alloy cutter head 13, the wear resistance of the drill bit 1 is effectively enhanced, and it can maintain long-term stable operation in a high-strength and high-hardness environment to ensure the service life of the drill bit 1; by winding and setting multiple cutting parts 12 around the outer periphery of the drill body 11, it is helpful to evenly distribute the cutting force of the drill bit 1, reduce local overheating or damage, and improve the safety and reliability of the removal process. In addition, through the efficient transmission connection between the driving mechanism 2 and the drill body 11, the rotation stability of the drill bit 1 is guaranteed, the cutting process is faster and more labor-saving, and the removal time and energy consumption are saved. The blast furnace iron groove removal device can operate stably, reduce the interference of human factors on the removal effect, enhance the safety of operation, and reduce the probability of work accidents. The driving mechanism 2 can be a combination of a manipulator and a motor.

[0038] Furthermore, if Figure 2As shown in the figure, a plurality of alloy cutter heads 13 are arranged at intervals on each cutting part 12. The alloy cutter head 13 includes an alloy body 131 and a cutting head 132 protruding from the alloy body 131. The alloy body 131 is detachably connected to the cutting part 12, and the cutting head 132 can scrape the working layer 5. By arranging a plurality of alloy cutter heads 13 at intervals on each cutting part 12, and each cutter head includes a protruding cutting head 132, the cutting area and cutting force of the cutting part 12 can be effectively increased, ensuring a more uniform and continuous cutting force during the cutting process, improving the overall cutting ability. Especially when demolishing the hard materials of the blast furnace trough 4, it provides more stable and efficient cutting performance. In addition, the design that the cutting head 132 protrudes from the alloy body 131 enables the alloy cutter head 13 to scrape and cut more precisely when contacting the working layer 5, improving the cutting accuracy, reducing the damage to the surrounding materials, and ensuring the cutting quality during the demolition of the blast furnace trough 4. Of course, the detachable connection design between the alloy body 131 and the cutting part 12 enables the alloy cutter head 13 to be replaced or repaired as needed, extending the service life of the drill bit 1.

[0039] Furthermore, an air intake passage is arranged in the drill body 11. An air outlet hole is arranged on the side of the cutting part 12 away from the drill body 11, and the air outlet hole is located between two adjacent alloy cutter heads 13. The air outlet hole is communicated with the air intake passage, and the air intake passage is communicated with an external air source. When the drill bit 1 rotates, the gas in the external air source is introduced through the air intake passage, and the air flow is guided to the cutting part 12 through the air outlet hole, forming a local cooling effect, which can effectively reduce the friction and heat accumulation between the drill bit 1 and the workpiece, reduce the risk of overheating of the drill bit 1, and extend the tool life. Of course, the guiding of the air flow also helps to carry away the chips generated during the cutting process, avoid the chips from blocking the cutting area or affecting the cutting effect, thereby improving the smoothness and efficiency of the cutting.

[0040] Optionally, by mass fraction, the composition requirements of the drill body 11 and the cutting part 12 are as follows: titanium carbide: 55%-70%, iron: 25%-35%, molybdenum carbide: 1%-15%, vanadium carbide: 1%-5%. Titanium carbide not only has high hardness but also can maintain good stability at high temperatures. During the drilling process, high temperatures will be generated on the surface of the drill bit 1. The high thermal stability of titanium carbide can effectively prevent the drill bit 1 from softening or deforming due to high temperatures, thereby maintaining the cutting performance. A high proportion of titanium carbide can ensure that the drill bit 1 maintains a low wear rate during long-term use and extends the service life of the tool. The addition of iron and molybdenum carbide can enhance the oxidation resistance of the alloy material, especially in high-temperature environments, reducing the influence of oxidation corrosion on the drill bit 1. The addition of molybdenum carbide and vanadium carbide helps to improve the hardness and toughness of the cutting parts, enhance the processing ability of materials with higher hardness, improve the cutting performance of materials, increase the penetration ability and cutting speed of the drill bit 1 in hard materials, and effectively ensure the toughness and impact resistance of the drill bit 1.

[0041] Certainly, in a processing environment with lower requirements, the composition requirements for the drill body 11 and the cutting part 12 can also be selected as: 55%-70% titanium carbide and a total of 30%-45% of iron, cobalt, nickel, etc. The addition of metal elements such as iron, cobalt, and nickel can improve the strength and toughness of the material. Cobalt and nickel are particularly helpful in improving the high-temperature resistance and corrosion resistance of the material, thereby improving the stability and adaptability of the drill bit 1 in a complex working environment, making the drill bit 1 have high hardness, high wear resistance, good oxidation resistance, and a certain degree of toughness, and with relatively low production costs.

[0042] Preferably, as Figure 2 shown, an arc transition is provided at the connection between the cutting part 12 and the drill body 11. Using an arc transition to connect the cutting part 12 and the drill body 11 can not only improve the durability, fatigue resistance, and cutting performance of the drilling tool, but also enhance its overall structural strength and operation efficiency, making the drilling tool more reliable and efficient in a complex operation environment. Specifically, compared with a traditional right-angle connection that is prone to stress concentration, especially during high-load cutting, it is easy to cause material fatigue, fracture, or wear. The arc transition can effectively disperse stress, avoid stress concentration, thereby reducing material damage and fatigue, and extending the service life of the drill bit 1. The arc-shaped transition makes the connection between the cutting part 12 and the drill body 11 of the drill bit 1 smoother, which can effectively relieve the impact force and vibration generated during the cutting process, reduce the uneven stress on the structure during high-intensity operation. And the cutting process can reduce the resistance to the material, lower the energy consumption and frictional loss during the operation process, thereby improving the working efficiency and operation economy.

[0043] Furthermore, the helix angle of the cutting part 12 is θ, and 12° ≤ θ ≤ 18°. For example, the helix angle θ of the cutting part 12 is 12°, 13°, 14°, 15°, 16°, 17°, 18°, etc. In this embodiment, the helix angle θ of the cutting part 12 is preferably 15°. If the helix angle of the cutting part 12 is too small, it will lead to excessive cutting force, poor chip evacuation, increased wear of the drill bit 1, and easy vibration; while if the helix angle is too large, it may lead to dispersed cutting force, difficult chip control, the drill bit 1 bearing a large radial force, and even accelerating the wear of the drill bit 1. The helix angle of the cutting part 12 in this solution is moderate, within the range of 12° to 18°, which can maintain a relatively low cutting resistance while ensuring the smooth evacuation of chips, thereby improving the cutting efficiency, reducing the processing time, and optimizing the distribution of the cutting force, making the force borne by each cutting part 12 more uniform, thus reducing the local wear of the drill bit 1 and improving the processing accuracy and uniformity.

[0044] As Figures 1 to 4As shown, an embodiment of the present invention further provides a method for repairing a blast furnace trough, which applies the blast furnace trough demolition device of any of the above embodiments, and includes the following steps:

[0045] S10. Close the tapping hole 3 of the blast furnace and clean the remaining materials in the trough 4;

[0046] S20. Measure the maximum wear depth H of the working layer 5 of the trough 4, and mark the erosion line 100 of the entire working layer 5 based on the maximum wear depth H;

[0047] S30. Drive the drill bit 1 to rotate by the driving mechanism 2 of the blast furnace trough demolition device, so that the drill bit 1 grinds the working layer 5 until the working layer 5 is ground flat to the erosion line 100;

[0048] S40. Install a casting mold corresponding to the shape and size of the trough 4, pour casting material between the remaining working layer 5 and the casting mold, wait for drying and shaping, and then remove the mold to form a complete working layer 5. The remaining working layer 5 is the remaining working layer 5 after demolition.

[0049] This method is simple to operate. During the repair process, the maximum wear depth of the working layer 5 is accurately measured, and the erosion line 100 of the entire working layer 5 is marked based on this depth, which can ensure the precise control of the shape and size of the trough 4 during the repair process. In this way, it can effectively avoid uneven repair caused by human error or improper operation, and ensure the uniformity and consistency of the working layer 5 after repair. At the same time, the automated operation of the demolition device is adopted. Compared with the traditional manual repair method, it can reduce the risks and instabilities brought by manual operation. The automated equipment reduces the interference of human factors, making the repair work more reliable and safe. And pouring is carried out using a casting mold that matches the shape and size of the trough 4, ensuring that the size and shape of the working layer 5 after repair are the same as those of the original trough 4. This not only helps to repair the shape of the working layer 5, but also ensures that the repaired trough 4 can continue to adapt to the working environment of the blast furnace and restore its normal function.

[0050] In addition, by driving the drill bit 1 to rotate through the driving mechanism 2, the alloy cutter heads 13 on the plurality of cutting parts 12 wound around the outer periphery of the drill body 11 can efficiently cut the working layer 5 of the trough 4, with high cutting efficiency and cutting accuracy. While ensuring the effective demolition of the working layer 5, it reduces the impact on the steel shell layer 7, heat insulation layer 8 and refractory brick layer 9 of the trough 4, thus ensuring the service life and use safety of the overall structure of the trough 4. And it is not necessary to demolish the entire working layer 5. Only the working layer 5 with the deepest erosion thickness H needs to be demolished and re-poured, effectively reducing the input of casting material, saving costs, and shortening the repair time of the working layer 5 (reducing the time for demolishing and pouring the non-eroded thickness of the working layer 5), and improving the repair efficiency.

[0051] It should be noted that the blast furnace trough 4 includes a main trough 41, an iron trough 42 and a slag-iron trough 43, and their structural compositions all include a furnace platform hardening layer 6, a steel shell layer 7, a heat insulation layer 8, a refractory brick layer 9 and a working layer 5. When carrying out the demolition operation of the slag-iron trough 43, the slag-iron trough 43 stops running offline, and the residual high-temperature slag and iron in the slag-iron trough 43 should be drained completely.

[0052] Optionally, the blast furnace has multiple tapping holes 3 to connect multiple troughs 4. Before step S10, according to the monitoring results of the erosion amount of the working layer 5 of each trough 4, it is determined to repair the designated trough 4, and the tapping hole 3 corresponding to the trough 4 is closed, while keeping the other tapping holes 3 and troughs 4 running. By closing the tapping hole 3 corresponding to the trough 4 to be repaired before repair and keeping the normal operation of the other tapping holes 3 and troughs 4, the continuous production of the blast furnace is ensured, which not only maintains the production efficiency, but also avoids affecting the activity of the blast furnace hearth and the economic losses caused by full or partial production stoppages, optimizes the operation process of the blast furnace, and ensures the operation efficiency and economic benefits of the blast furnace.

[0053] Furthermore, in step S30, the working layer 5 outside the erosion line 100 should be evenly divided into multiple demolition zones along its own length direction according to (1.2 - 1.7)D of the diameter D of the drill bit 1, and the driving mechanism 2 drives the drill bit 1 to grind each demolition zone segment by segment. Dividing the length range (1.2 - 1.7)D of the demolition zone according to the diameter D of the drill bit 1 can accurately control the range of each demolition zone, ensure that the demolition work can be carried out concentratedly and efficiently, make each demolition operation have good controllability, and avoid misoperation or excessive demolition of the non-erosion zone. The method of segmented demolition not only helps to refine the operation steps, but also ensures that the time and force of each grinding are reasonably allocated, thereby improving the efficiency of the entire demolition process and reducing unnecessary waiting or stagnation time. For example, the lengths of the demolition zones are 1.2D, 1.3D, 1.4D, 1.5D, 1.6D, 1.7D, etc. Preferably, the length of the demolition zone is 1.5D.

[0054] Even further, step S30 specifically includes the following steps:

[0055] S301. The driving mechanism 2 drives the drill bit 1 to start grinding the surface of the working layer 5 at 1000 - 1500 r / min until it is adjacent to the erosion line 100;

[0056] S302. The driving mechanism 2 drives the drill bit 1 to continue grinding the working layer 5 at 200 - 300 r / min until the working layer 5 is ground flat to the erosion line 100. In the initial stage, the drill bit 1 performs preliminary grinding at a relatively high speed, which can quickly remove materials in a large area and rapidly approach the erosion line 100. The relatively high speed can achieve rapid processing of a large area, enabling the surface of the working layer 5 to quickly reach a state close to the erosion line 100, improving the efficiency of initial grinding and reducing unnecessary time waste. During the later grinding stage, the speed is reduced to a low speed to perform more refined grinding operations. The lower speed makes the grinding of the drill bit 1 smoother and more uniform, which helps to control the grinding depth and ensures that the working layer 5 does not suffer excessive wear or uneven grinding when approaching the erosion line 100, effectively avoiding misoperations or excessive damage to the working layer 5 and ensuring the high quality and efficiency of the overall demolition operation.

[0057] Furthermore, in step S40, for the depth H of the trough 4, when the mold is taken out, place wood accounting for 40%H - 60%H of H in the trough 4, and cover it with a hood having ventilation holes and then ignite the wood for baking. By baking with wood, it can effectively accelerate the drying of the working layer 5, and the placement depth of the wood (40%H - 60%H) ensures the uniformity of the distribution of the wood in the trough 4 and the adequacy of contact, which can avoid excessive accumulation of wood, resulting in poor ventilation or uneven heating, and ensure that the wood can be fully baked. The hood has the characteristic of having ventilation holes. On the one hand, the hood can reduce the dissipation of heat, and on the other hand, the ventilation holes enable hot air to circulate during the baking process, providing the necessary air exchange.

[0058] Obviously, the above-mentioned embodiments of the present invention are merely examples for clearly explaining the present invention, rather than limiting the implementation manners of the present invention. For those of ordinary skill in the art, various obvious changes, re-adjustments, and substitutions can be made without departing from the protection scope of the present invention. It is not necessary and impossible to enumerate all the implementation manners here. Any modifications, equivalent substitutions, and improvements made within the spirit and principle of the present invention shall be included within the protection scope of the claims of the present invention.

Claims

1. A blast furnace iron runner demolition device, characterized in that, include: A drill bit, the drill bit comprising a drill body, a cutting part and an alloy cutter head, a plurality of the cutting parts are evenly distributed in an annular manner on the outer circumference of the drill body, and the cutting parts are spirally wound around the outer circumference of the drill body, and the alloy cutter head is arranged on the side of the cutting part away from the drill body; A driving mechanism is connected to the drill body in a driving manner to drive the alloy cutter head to rotate and cut the working layer of the blast furnace iron groove.

2. The blast furnace iron runner demolition device according to claim 1, wherein A plurality of the alloy cutter heads are arranged at intervals on each cutting portion. The alloy cutter heads include an alloy body and a cutting head protruding from the alloy body. The alloy body is detachably connected to the cutting portion, and the cutting head can scratch the working layer.

3. The blast furnace iron runner demolition device according to claim 2, characterized in that An air inlet passage is arranged in the drill body, an air outlet is arranged on the side of the cutting part away from the drill body, and the air outlet is located between two adjacent alloy cutter heads, the air outlet is communicated with the air inlet passage, and the air inlet passage is connected to an external air source.

4. The blast furnace iron runner demolition device according to any one of claims 1 to 3, characterized in that, Measured by mass, the drill body and / or the cutting portion comprises the following components: titanium carbide: 55%-70%, iron: 25%-35%, molybdenum carbide: 1%-15%, and vanadium carbide: 1%-5%.

5. The blast furnace trough demolition device according to any one of claims 1-3, characterized in that, The connection between the cutting part and the drill body is arranged with an arc transition; and / or, The helix angle of the cutting portion is θ, 12°≤θ≤18°.

6. A method for repairing a blast furnace trough, characterized in that, The blast furnace iron ditch removal device according to any one of claims 1 to 5 is applied, comprising the following steps: S10, closing the taphole of the blast furnace and cleaning the remaining materials in the iron ditch; S20, measuring the maximum wear depth H of the working layer of the iron groove, and marking the erosion line of the entire working layer based on the maximum wear depth H; S30, using the driving mechanism of the blast furnace iron groove removal device to drive the drill bit to rotate, so that the drill bit grinds the working layer until the working layer is grinded flat to the erosion line; S40, installing a casting mold corresponding to the shape and size of the iron ditch, and pouring the casting material between the remaining working layer and the casting mold, and taking out the mold after drying and shaping to form a complete working layer.

7. The method for repairing a blast furnace trough according to claim 6, wherein The blast furnace has multiple iron outlets to connect multiple iron grooves. Before step S10, according to the monitoring results of the erosion amount of the working layer of each iron groove, it is determined to repair the designated iron groove, and the iron outlet corresponding to the iron groove is closed, while the remaining iron outlets and iron grooves are kept in operation.

8. The blast furnace trough repair method according to claim 6, characterized in that, In step S30, the working layer outside the erosion line should be evenly divided into multiple demolition areas according to the diameter D of the drill bit along its length direction according to (1.2-1.7)D, and the driving mechanism drives the drill bit to grind the demolition area section by section.

9. The method for repairing a blast furnace iron runner according to claim 6, wherein Step S30 specifically includes the following steps: S301, the driving mechanism drives the drill bit to grind the surface of the working layer at 1000-1500 r / min until it is close to the erosion line; S302, the driving mechanism drives the drill bit to continue grinding the working layer at 200-300 r / min until the working layer is ground flat to the erosion line.

10. The blast furnace trough repair method according to claim 6, characterized in that, In step S40, for the depth H of the runner, when the mold is removed, place wood accounting for 40%H - 60%H into the runner, cover it with a hood having ventilation holes, and then ignite the wood for baking.

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