Blast furnace cooling wall mounting and fastening method

Abstract

The invention relates to the technical field of blast furnace cooling wall mounting, and discloses a blast furnace cooling wall mounting and fastening method which comprises the following steps: S1, firstly, manufacturing a simulation cooling wall model with a thermal expansion compensation piece, and preassembling a fixing module with an interlocking groove on the model; the model is hung on a furnace shell, and the distance between the cooling water pipe and the furnace shell, the alignment condition of a rod of the fixing module and a furnace shell hole, the coaxiality of a positioning pin of the linkage module and a furnace shell reference hole and the circle center deviation of the cooling water pipe of the simulation cooling wall model and the furnace shell hole are checked. The device can resist stress impact of the blast furnace under complex working conditions, prevent displacement deformation, loosening and protruding of the cooling wall and guarantee the stability of the furnace profile and long-term safe operation of the blast furnace, and through the precise installation design of the first fixing module, the combination of the connecting rod and the wedge-shaped lock and the cooperation of the wedge-shaped clamping block and the clamping groove, the cooling wall can be firmly fixed. Coal gas flow impact and furnace charge descending impact can be directly resisted, and the cooling wall is prevented from loosening and protruding.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of blast furnace cooling wall installation, in particular to a blast furnace cooling wall installation and fastening method. BACKGROUND

[0002] The cooling wall is a modularized cooling equipment of the blast furnace from bottom to top, and is an essential equipment for maintaining the production of the blast furnace.

[0003] The installation and fastening of the blast furnace cooling wall takes high-strength bolt connection as the core, and combines sealing measures to adapt to high-temperature and high-pressure working conditions, and the specific process is as follows: first, the cooling wall body and the furnace shell installation surface are checked, the radial and circumferential positions of the cooling wall are determined through positioning pins or templates, and the adjacent gap is ensured to be 5-10mm and the perpendicularity is ensured; then, the cooling wall back bolt hole is aligned with the furnace shell reserved hole, the high-temperature adapted high-strength bolt such as 40CrNiMoA is penetrated, the torque wrench is used for pre-tightening in 2-3 times in diagonal order, double nuts or high-temperature anti-loosening glue is added for anti-loosening at key positions such as the bosh and the belly; then, high-temperature resistant asbestos rope or expanded graphite gasket is laid on the bonding surface of the cooling wall and the furnace shell for sealing, high-alumina refractory castable is filled in the adjacent gap and is vibrated and compacted; finally, the torque wrench is used for rechecking the bolt torque, and the cooling wall waterway is tested to complete acceptance.

[0004] Affected by the rising of blast furnace production gas flow, the descending of furnace charge, high temperature, high pressure, stress change and the like, the cooling wall is prone to displacement and deformation in long-term continuous production. If the installation process is not strictly controlled, the cooling wall is prone to loosening and protruding into the blast furnace, resulting in irregular furnace shape, abnormal blast furnace condition, poor technical index, cooling wall water leakage failure and shortened blast furnace service life. SUMMARY

[0005] In view of the deficiencies of the prior art, the present application provides a blast furnace cooling wall installation and fastening method, which solves the problems of displacement and deformation of the cooling wall in long-term production due to the rising of blast furnace gas flow, the descending of furnace charge, high temperature, high pressure and stress change.

[0006] To achieve the above purpose, the present application is implemented by the following technical scheme: a blast furnace cooling wall installation and fastening method, comprising the following steps: S1, first, a simulation cooling wall model with a thermal expansion compensation member is made, and a fixed module with a chain groove is pre-installed on the model; then, the model is hung on the furnace shell, the spacing between the cooling water pipe and the furnace shell, the alignment of the rod of the fixed module and the hole of the furnace shell, the coaxiality of the positioning pin of the chain module and the reference hole of the furnace shell, and the center deviation of the cooling water pipe of the simulation cooling wall model and the hole of the furnace shell are checked, and the standard data is recorded at the same time, providing a reference for subsequent installation; S2. Based on the standard data of step S1, install the first fixing module with wedge lock on the cooling wall. When it is hoisted to the furnace shell position, the wedge lock automatically locks to form temporary safety protection. After the adjacent cooling walls are in place, they are connected by a two-stage interlocking module. First, physical locking is achieved by mechanical teeth, and then gaps are eliminated by magnetic adhesion. Combined with the standard data of step one, the installation position of the cooling wall is ensured to be accurate and stable. S3. Based on the initial fixing in step S2, install the second fixing module with anti-rotation teeth, and tighten it in two steps with tools, first pre-tightening and then final tightening; then implement multi-layer sealing, lay metal sheets in sequence, spot weld and fix, apply high-temperature sealant, and finally install the protective cover and weld the seal to prevent gas leakage and high-temperature corrosion. S4. Based on the installation of each step in steps S1-S3, use infrared thermal imaging to detect the temperature difference on the surface of the cooling wall. If the temperature difference does not exceed 5℃, it is determined that the gap between the cooling wall and the furnace shell is uniform. Then, use ultrasonic flaw detection to check the solder joints of the interlocking module. Perform water pressure test on the cooling water pipe and air tightness test on the furnace shell respectively to ensure that there is no water leakage and no air leakage, which is used to verify the installation quality of the previous steps. S5. Based on the installation structure system established in steps S1-S4, install temperature and vibration monitors on the outside of the fixed module for real-time data transmission and automatic alarm when temperature changes or vibration exceeds the standard; regularly inspect and maintain the fixed module, interlocking module and sealing structure to ensure convenient use in the future. The above steps are connected sequentially. The standard data in step S1 provides a basis for the precise installation in step two. The initial fixing in step S2 lays the foundation for the final tightening in step three. The sealing in step S3 and the inspection in step S4 together ensure the reliability of the seal. The monitoring and regular maintenance in step S5 achieve long-term stable use.

[0007] Preferably, the thermal expansion compensation component in step S1 is made of stainless steel, which can expand and contract with temperature changes, and can simulate the thermal expansion and contraction of actual cooling water pipes to ensure the authenticity of furnace shell calibration.

[0008] Preferably, in the furnace shell calibration of step S1, the coaxiality deviation between the positioning pin of the interlocking module and the reference hole of the furnace shell is allowed to be no more than 0.3 mm, and the center deviation between the cooling water pipe of the simulated cooling wall model and the opening of the furnace shell is allowed to be no more than 0.5 mm. If the deviation exceeds the limit, it can be corrected by grinding the reference surface of the furnace shell or enlarging the hole.

[0009] Preferably, in step S2, when installing the first fixing module, it is ensured that the inclined block of the wedge lock fits tightly with the corresponding slot without loosening, and the positioning pin of the interlocking module is inserted into the positioning hole of the cooling wall to a depth of at least 20 mm.

[0010] Preferably, the specific process of the double-level interlocking in step S2 is as follows: When the two adjacent cooling wall bodies to be installed on the inner side of the blast furnace shell are hoisted and temporarily fixed by their respective first fixing modules with wedge locks, and when the edges of the two cooling wall bodies are aligned and the spacing meets the preset construction standards, the interlocking plate pre-installed on one cooling wall body automatically pops out and inserts into the interlocking groove pre-installed on the other cooling wall body, and the anti-backlash teeth clamp to achieve one-way locking; at the same time, the magnet in the interlocking groove attracts the interlocking plate, eliminates the mechanical lock gap, and completes the stable connection of the two adjacent cooling wall bodies.

[0011] Preferably, the final tightening process in step S3 is as follows: the fixing seat of the second fixing module is sleeved on the outer periphery of the fixing rod of the first fixing module. When the fixing seat is rotated and tightened, the inner sidewall of the fixing seat continuously contacts and pushes the blocking plate of the first fixing module, forcing the blocking plate to rotate around its own rotation axis, changing from the initial temporary anti-fall state perpendicular to the fixing rod to the unlocked state parallel to the fixing rod; at this time, the temporary locking structure of the first fixing module fails, and the thread inside the fixing seat is tightly engaged with the thread on the outer periphery of the fixing rod, completing the conversion of the cooling wall from temporary fixation to tight fixation.

[0012] Preferably, the multi-layer sealing process in step S3 is as follows: a metal sheet is laid between the gasket and the furnace shell sealing ring, and at least four spot welds are made at each connection point; high-temperature sealant is applied to the joint; and then a protective cover with built-in heat insulation cotton is installed and fully welded to seal the protective cover.

[0013] Preferably, the detection details of step S4 are as follows: infrared thermal imaging divides the cooling wall into several detection grids, the temperature difference of a single grid does not exceed 3℃ and the overall temperature difference does not exceed 5℃, and the gaps are judged to be uniform; ultrasonic flaw detection checks the weld points of the interlocking module, and if there are no cracks, the connection is judged to be reliable.

[0014] Preferably, the two-step tightening in step S3 is as follows: in the pre-tightening stage, a lower torque is used to ensure that the threads are fully engaged, and in the final tightening stage, a torque of 400 N·m is used and held for 10 seconds to ensure that the fixing module is tightened in place and to avoid damage to the threads.

[0015] Preferably, in step S5, the temperature monitor and vibration monitor transmit data in real time, and trigger an SMS notification when the warning threshold is exceeded three times consecutively. The data storage period of the monitor is not less than three months, which facilitates the viewing of the operating status of the cooling wall and the fixed module.

[0016] This invention provides a method for installing and fastening a blast furnace cooling wall. It has the following advantages: 1. This invention can resist stress impact under complex working conditions of blast furnace, prevent displacement deformation and loosening of cooling wall, ensure furnace stability and long-term safe operation of blast furnace. Through the precise installation design of the first fixing module, the combination of connecting rod and wedge lock, and the cooperation of wedge block and slot can directly resist the impact of gas flow and the impact of furnace charge descent, and avoid the cooling wall from loosening and protruding.

[0017] 2. This invention improves the reliability of temporary fixing of cooling walls and the accuracy of adjacent interlocking, avoids the risks of high-altitude installation, and avoids the fact that traditional temporary fixing of cooling walls relies on manual spot welding or simple clamps, which are prone to shaking during hoisting due to insufficient clamping force. In addition, adjacent cooling wall interlocking modules often cannot be accurately connected due to positioning deviations. This invention eliminates the need for high-altitude adjustments, thereby reducing the risks of high-altitude operations and improving the efficiency of interlocking. Attached Figure Description

[0018] Figure 1 This is a flowchart of the method of the present invention. Detailed Implementation

[0019] The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0020] Please see the appendix Figure 1 The present invention provides a method for installing and fastening a blast furnace cooling wall, comprising the following steps: S1. First, make a simulation cooling wall model with thermal expansion compensation components, and pre-install the fixing module with interlocking groove on the model; then hang the model on the furnace shell, check the distance between the cooling water pipe and the furnace shell, the alignment of the rod of the fixing module and the furnace shell hole, the coaxiality of the positioning pin of the interlocking module and the furnace shell reference hole, and the center deviation between the cooling water pipe of the simulation cooling wall model and the furnace shell opening. At the same time, record the standard data to provide a reference for subsequent installation. First, a simulated cooling wall model is made according to the 1:1 scale of the cooling wall to be installed. The main body of the model is formed by welding steel plates. The model has simulated cooling water pipe holes, fixed module mounting holes and interlocking module positioning holes that are completely consistent with the actual cooling wall. The thermal expansion compensation component in step S1 is made of stainless steel and can expand and contract with temperature changes. It can simulate the thermal expansion and contraction of actual cooling water pipes and is used to ensure the authenticity of furnace shell calibration. Next, a corrugated metal thermal expansion compensation component is welded to the outer periphery of the simulated cooling water pipe hole of the model: the compensation component is made of 304 stainless steel, and each simulated water pipe section is equipped with 3 sets of compensation components to ensure that the thermal expansion under actual working conditions can be simulated. In the furnace shell calibration of step S1, the coaxiality deviation between the positioning pin of the interlocking module and the furnace shell reference hole is allowed to be no more than 0.3 mm, and the center deviation between the cooling water pipe of the simulated cooling wall model and the furnace shell opening is allowed to be no more than 0.5 mm. If the deviation exceeds the limit, it can be corrected by grinding the furnace shell reference surface or enlarging the hole. The wedge-shaped lock base of the first fixing module with interlocking groove and the anti-rotation toothed base of the second fixing module are then pre-installed on the simulation model with bolts. The bolt torque is controlled at 50 N·m to avoid deformation of the model due to excessive tightness and displacement of the pre-installation position due to excessive looseness. The interlocking groove is opened on the side of the module to cooperate with the subsequent interlocking plate. Finally, the simulation model is hoisted to the area to be installed on the furnace shell and positioned using the pre-set positioning reference blocks on the furnace shell to ensure that the model fits snugly against the furnace shell. A laser rangefinder was used to detect the distance between the simulated cooling water pipe section and the furnace shell; a dial indicator was used to detect the alignment deviation between the connecting rod of the first fixed module and the through hole of the furnace shell; a coaxiality tester was used to detect the coaxiality between the positioning pin of the interlocking module and the reference hole of the furnace shell; and a centering instrument was used to detect the center deviation between the simulated cooling water pipe hole of the model and the opening of the furnace shell. When insufficient spacing occurs, use a laser cutting machine to enlarge the opening in the furnace shell; when coaxiality or center deviation exceeds the standard, use an angle grinder to grind the reference surface of the furnace shell. After the inspection and correction are completed, record all standard data, including but not limited to spacing, alignment deviation, and coaxiality, as the reference for subsequent actual cooling wall installation; S2. Based on the standard data of step S1, install the first fixing module with wedge lock on the cooling wall. When it is hoisted to the furnace shell position, the wedge lock automatically locks to form temporary safety protection. After the adjacent cooling walls are in place, they are connected by a two-stage interlocking module. First, physical locking is achieved by mechanical teeth, and then gaps are eliminated by magnetic adhesion. Combined with the standard data of step one, the installation position of the cooling wall is ensured to be accurate and stable. First fixing module installation: Install the first fixing module with wedge lock to the cooling wall. The first fixing module includes a connecting rod and a wedge block. First, insert the end of the connecting rod into the hole reserved on the cooling wall. The end of the connecting rod has a groove for locking into the wedge block. The end of the connecting rod also has threads for subsequent cooperation with the second module. After fixing, use a laser rangefinder to check the alignment deviation with the standard data recorded in step S1. If the deviation is ≤0.3mm, use wooden wedges to temporarily tighten the gap between the cooling wall and the furnace shell to ensure the position is stable. When hoisting the second adjacent cooling wall, repeat the above steps to temporarily fix it, ensuring that the edges of the two cooling walls are aligned; The second cooling wall triggers the action of the two-stage interlocking module. The interlocking plate of the second cooling wall automatically pops out under the action of the spring and inserts into the interlocking groove of the first cooling wall. When inserted, the interlocking plate squeezes and compresses the anti-backward teeth. When the anti-backward groove and the anti-backward teeth are aligned, the anti-backward teeth are reset and locked under the action of the spring, realizing one-way locking. The neodymium iron boron magnets pre-installed in the interlocking slot attract the stainless steel lining of the interlocking plate, generating attraction, eliminating the gap of the mechanical lock, and completing the stable connection of the two cooling walls. S3. Based on the initial fixing in step S2, install the second fixing module with anti-rotation teeth, and tighten it in two steps with tools, first pre-tightening and then final tightening; then implement multi-layer sealing, lay metal sheets in sequence, spot weld and fix, apply high-temperature sealant, and finally install the protective cover and weld the seal to prevent gas leakage and high-temperature corrosion. The final tightening process in step S3 is as follows: the fixing seat of the second fixing module is sleeved on the outer periphery of the fixing rod of the first fixing module. When the fixing seat is rotated and tightened, the inner sidewall of the fixing seat continuously contacts and pushes the blocking plate of the first fixing module, forcing the blocking plate to rotate around its own rotation axis, changing from the initial temporary anti-fall state perpendicular to the fixing rod to the unlocked state parallel to the fixing rod; at this time, the temporary locking structure of the first fixing module fails, and the thread inside the fixing seat is tightly engaged with the thread on the outer periphery of the fixing rod, completing the conversion of the cooling wall from temporary fixation to tight fixation; Step S3 involves two tightening steps: During the pre-tightening stage, a lower torque is used to ensure the threads are fully engaged; during the final tightening stage, a torque of 400 N·m is applied and held for 10 seconds to ensure the module is securely fastened and to prevent damage to the threads. Fit the second fixing module with anti-rotation teeth onto the outer circumference of the tail connecting rod of the first fixing module, and tighten it in two steps using a hydraulic torque wrench: Pre-tightening stage: Apply 300 N·m torque and hold for 10 seconds; Final tightening stage: Gradually increase to 400 N·m torque and hold for 10 seconds; During the tightening process, the inner wall of the fixing seat continuously contacts and pushes the blocking plate of the first fixing module, forcing the blocking plate to rotate around the rotation axis until it is parallel to the connecting rod. At this time, the wedge-shaped block of the first fixing module disengages from the slot under the axial force of the connecting rod, completing the conversion of the cooling wall from temporary fixing to tight fixing; The specific process of multi-layer sealing in step S3 is as follows: a metal sheet is laid between the gasket and the furnace shell sealing ring, and at least four spot welds are made at each connection point; high-temperature sealant is applied to the joint; then a protective cover with built-in heat insulation cotton is installed, and the protective cover is fully welded and sealed. First layer of sealing: A 0.1mm thick nickel-based alloy foil is laid between the gasket and the furnace shell sealing ring, and the surface of the foil is coated with silane coupling agent; Second layer of sealing: Spot welding is used to spot weld each connection point with an arc welding diameter of 4mm and a quantity of 4 points. After welding, the welding slag is cleaned with an angle grinder. Third layer of sealing: Apply high-temperature ceramic sealant to the joints to ensure that all gaps are covered; Fourth layer of sealing: Install a protective cover with built-in heat insulation cotton. The protective cover is connected to the furnace shell by full welding, completely covering the fixed module and sealing structure; S4. Based on the installation of each step in steps S1-S3, use infrared thermal imaging to detect the temperature difference on the surface of the cooling wall. If the temperature difference does not exceed 5℃, it is determined that the gap between the cooling wall and the furnace shell is uniform. Then, use ultrasonic flaw detection to check the solder joints of the interlocking module. Perform water pressure test on the cooling water pipe and air tightness test on the furnace shell respectively to ensure that there is no water leakage and no air leakage, which is used to verify the installation quality of the previous steps. The detection details of step S4 are as follows: Infrared thermal imaging divides the cooling wall into several detection grids, with the temperature difference of a single grid not exceeding 3℃ and the overall temperature difference not exceeding 5℃, and the gaps are judged to be uniform; Ultrasonic testing is used to inspect the weld points of the interlocking module, and if there are no cracks, the connection is judged to be reliable. When testing the uniformity of the gap, an infrared thermal imager is used to inspect the surface of the cooling wall. The surface of the cooling wall is divided into several inspection grids. If the temperature difference of a certain grid is large, it is necessary to check whether the seal is too tight or whether the cooling wall is deformed. If necessary, the fixing module should be loosened and readjusted. For module connection reliability testing, an ultrasonic flaw detector is used to inspect the solder joints of the interlocking module. The probe moves around the solder joint to detect whether there are cracks inside the solder joint. If point defects are found, one spot is repaired by welding. If linear cracks are found, the original solder joint is cut off and re-welded to ensure reliable connection. For water pressure sealing test, tap water is introduced into the cooling water pipe, and the pressure is slowly increased by the booster pump. After holding the pressure for 30 minutes, if there is no pressure drop on the pressure gauge and no leakage at the water pipe weld, it is considered qualified. Air tightness test: Compressed air is introduced into the gap between the furnace shell and the cooling wall using an air compressor, and the pressure is maintained for 20 minutes. The test is performed by a pressure sensor, and if no bubbles are found when soapy water is applied to the seam, it is considered qualified. S5. Based on the installation structure system established in steps S1-S4, install temperature and vibration monitors on the outside of the fixed module for real-time data transmission and automatic alarm when temperature changes or vibration exceeds the standard; regularly inspect and maintain the fixed module, interlocking module and sealing structure to ensure convenient use in the future. In step S5, the temperature and vibration monitors transmit data in real time. When the warning threshold is exceeded three times consecutively, an SMS notification is triggered. The data storage period of the monitors is no less than three months, which facilitates the viewing of the operating status of the cooling wall and the fixed module. Temperature and vibration monitors are installed on the outside of the protective cover of the second fixed module. The monitors upload data to the blast furnace central control system in real time via the LoRa protocol. The data sampling frequency is 1 time / minute and the storage period is 3 months. Temperature change and vibration acceleration warning thresholds are set. When the data exceeds the threshold for 3 consecutive times, the central control system triggers an audible and visual alarm and pushes warning information to the mobile APP of the operation and maintenance personnel. The above steps are connected sequentially. The standard data in step S1 provides a basis for the precise installation in step two. The initial fixing in step S2 lays the foundation for the final tightening in step three. The sealing in step S3 and the inspection in step S4 together ensure the reliability of the seal. The monitoring and regular maintenance in step S5 achieve long-term stable use.

[0021] Although embodiments of the invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A method for installing and fastening a blast furnace cooling wall, characterized in that, Includes the following steps: S1. First, make a simulation cooling wall model with thermal expansion compensation components, and pre-install the fixing module with interlocking groove on the model; then hang the model on the furnace shell, check the distance between the cooling water pipe and the furnace shell, the alignment of the rod of the fixing module and the furnace shell hole, the coaxiality of the positioning pin of the interlocking module and the furnace shell reference hole, and the center deviation between the cooling water pipe of the simulation cooling wall model and the furnace shell opening. At the same time, record the standard data to provide a reference for subsequent installation. S2. Based on the standard data of step S1, install the first fixing module with wedge lock on the cooling wall. When it is hoisted to the furnace shell position, the wedge lock automatically locks to form temporary safety protection. After the adjacent cooling walls are in place, they are connected by a two-stage interlocking module. First, physical locking is achieved by mechanical teeth, and then gaps are eliminated by magnetic adhesion. Combined with the standard data of step S1, ensure that the installation position of the cooling wall is accurate and stable. S3. Based on the initial fixation in step S2, install the second fixing module with anti-rotation teeth and tighten it in two steps with tools, first pre-tightening and then final tightening; then implement multi-layer sealing, lay metal sheets in sequence, spot weld and fix, apply high-temperature sealant, and finally install the protective cover and weld the seal to prevent gas leakage and high-temperature corrosion. S4. Based on the installation of each step in steps S1-S3, use infrared thermal imaging to detect the temperature difference on the surface of the cooling wall. If the temperature difference does not exceed 5℃, it is determined that the gap between the cooling wall and the furnace shell is uniform. Then, use ultrasonic flaw detection to check the solder joints of the interlocking module. Perform water pressure test on the cooling water pipe and air tightness test on the furnace shell respectively to ensure that there is no water leakage and no air leakage, which is used to verify the installation quality of the previous steps. S5. Based on the installation structure system established in steps S1-S4, install temperature and vibration monitors on the outside of the fixed module for real-time data transmission and automatic alarm when temperature changes or vibration exceeds the standard; regularly inspect and maintain the fixed module, interlocking module and sealing structure to ensure convenient use in the future. The above steps are connected sequentially. The standard data in step S1 provides the basis for the precise installation in step S2. The initial fixing in step S2 lays the foundation for the final tightening in step S3. The sealing in step S3 and the inspection in step S4 together ensure the reliability of the seal. The monitoring and regular maintenance in step S5 achieve long-term stable use.

2. The method for installing and fastening a blast furnace cooling wall according to claim 1, characterized in that, The thermal expansion compensation component in step S1 is made of stainless steel and can expand and contract with temperature changes, simulating the thermal expansion and contraction of actual cooling water pipes to ensure the authenticity of furnace shell calibration.

3. The method for installing and fastening a blast furnace cooling wall according to claim 2, characterized in that, In the furnace shell calibration of step S1, the coaxiality deviation between the positioning pin of the interlocking module and the furnace shell reference hole is allowed to be no more than 0.3 mm, and the center deviation between the cooling water pipe of the simulated cooling wall model and the furnace shell opening is allowed to be no more than 0.5 mm. If the deviation exceeds the limit, it can be corrected by grinding the furnace shell reference surface or enlarging the hole.

4. The method for installing and fastening a blast furnace cooling wall according to claim 1, characterized in that, In step S2, when installing the first fixing module, ensure that the wedge-shaped lock's inclined block fits tightly with the corresponding slot without any looseness, and that the positioning pin of the interlocking module is inserted into the positioning hole of the cooling wall to a depth of at least 20 mm.

5. The method for installing and fastening a blast furnace cooling wall according to claim 4, characterized in that, The specific process of the double-level interlocking in step S2 is as follows: The two adjacent cooling wall bodies to be installed inside the blast furnace shell are hoisted and temporarily fixed by their respective first fixing modules with wedge locks. When the edges of the two cooling wall bodies are aligned and the spacing meets the preset construction standards, the interlocking plate pre-installed on one cooling wall body automatically pops out and inserts into the interlocking groove pre-installed on the other cooling wall body. The anti-backlash teeth are locked to achieve one-way locking. At the same time, the magnet in the interlocking groove attracts the interlocking plate, eliminates the mechanical lock gap, and completes the stable connection of the two adjacent cooling wall bodies.

6. The method for installing and fastening a blast furnace cooling wall according to claim 5, characterized in that, The final tightening process in step S3 is as follows: the fixing seat of the second fixing module is fitted onto the outer periphery of the fixing rod of the first fixing module. When the fixing seat is rotated and tightened, the inner sidewall of the fixing seat continuously contacts and pushes the blocking plate of the first fixing module, forcing the blocking plate to rotate around its own rotation axis, changing from the initial temporary anti-fall state perpendicular to the fixing rod to the unlocked state parallel to the fixing rod; at this time, the temporary locking structure of the first fixing module fails, and the thread inside the fixing seat meshes tightly with the thread on the outer periphery of the fixing rod, completing the conversion of the cooling wall from temporary fixation to tight fixation.

7. The method for installing and fastening a blast furnace cooling wall according to claim 6, characterized in that, The specific process of multi-layer sealing in step S3 is as follows: a metal sheet is laid between the gasket and the furnace shell sealing ring, and at least four spot welds are made at each connection point; high-temperature sealant is applied to the joint; then a protective cover with built-in heat insulation cotton is installed, and the protective cover is fully welded and sealed.

8. The method for installing and fastening a blast furnace cooling wall according to claim 7, characterized in that, The detection details of step S4 are as follows: Infrared thermal imaging divides the cooling wall into several detection grids, with the temperature difference of a single grid not exceeding 3℃ and the overall temperature difference not exceeding 5℃, and the gaps are judged to be uniform; ultrasonic flaw detection checks the weld points of the interlocking module, and if there are no cracks, the connection is judged to be reliable.

9. A method for installing and fastening a blast furnace cooling wall according to claim 6, characterized in that, The two-step tightening process in step S3 is as follows: in the pre-tightening stage, a lower torque is used to ensure that the threads are fully engaged; in the final tightening stage, a torque of 400 N·m is used and held for 10 seconds to ensure that the fixing module is securely fastened and to avoid damage to the threads.

10. A method for installing and fastening a blast furnace cooling wall according to claim 8, characterized in that, In step S5, the temperature and vibration monitors transmit data in real time. When the warning threshold is exceeded three times consecutively, an SMS notification is triggered. The data storage period of the monitors is no less than three months, which facilitates the viewing of the operating status of the cooling wall and the fixed module.

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