Methods to extend the service life of the main blast furnace feed belt, main charging belt and its accessories

Abstract

This invention discloses a method for extending the service life of the main charging and main feeding belts and their accessories in a blast furnace. The method involves installing several rows of wear-resistant mesh inside the charging hopper; installing at least one pair of crossbars inside the weighing hopper below the charging hopper; and providing a transfer hopper between the main charging and main feeding belts, with an inclined transfer discharge channel below the transfer hopper, the transfer discharge channel forming an angle of 40-60° with the tail direction of the main feeding belt. This method, by improving the charging hopper, weighing hopper, and transfer hopper, can remove thin, sharp objects or large iron-containing objects from the material before it is conveyed to the main charging and main feeding belts, reducing the probability of belt damage and tearing, thereby extending their service life. Timely maintenance ensures the normal operation of the belts, effectively preventing unplanned blast furnace shutdowns and passive production stoppages.

Description

Technical Field

[0001] This invention relates to the field of metallurgical technology, specifically to a method for extending the service life of the main blast furnace feeding belt, main charging belt and its accessories. Background Technology

[0002] Currently, the development of blast furnaces is trending towards larger sizes. The charging method under the blast furnace trough has also evolved from the original electric winch-driven charging car to the current motor-driven belt charging. The belt generally adopts a flame-retardant and longitudinally tear-resistant steel wire rope core conveyor belt, which is divided into a main feeding belt and a main charging belt. The main unit includes a head motor, reducer, drive drum, redirecting drum, belt and tensioning device, etc.

[0003] Sintered ore and coke produced from sintering and coking processes, along with lump ore and pellets transported externally, are conveyed to the silo via a conveyor belt. After passing through the silo feeder, vibrating screen, weighing hopper, and gate, they are transported to the main feed conveyor belt. During this conveying process, multiple transfers occur, and the materials pass through numerous pieces of equipment. During transportation and unloading, some thin, sharp objects or large iron-containing objects (such as silo lining plates or baffle plates) buried in the ore and coke may fall and become stuck on the main feed conveyor belt, causing it to tear.

[0004] The main feeding belt is equipped with a permanent magnet iron separator, which is mainly used to adsorb iron-containing objects in ore and coke. However, it cannot adsorb thin, sharp objects or large iron-containing objects buried in ore and coke. These objects will fall and get stuck in the hopper below the head of the main feeding belt and above the tail of the main charging belt, causing the main charging belt to be torn at the top of the blast furnace and affecting the normal production of the blast furnace.

[0005] Aside from planned maintenance and sudden malfunctions that cause shutdowns, blast furnaces operate continuously for 24 hours a day. This continuous production is beneficial for the smooth operation of the blast furnace, ensuring high and stable output. The main feed and charging belts, which transport ore and coke to the blast furnace, are particularly critical. If a belt tears, the blast furnace must be shut down for repairs. Depending on the situation, temporary repairs, partial replacements, or even complete replacements may be necessary. In particular, complete belt replacement in emergency situations can take more than 24 hours, and unplanned shutdowns also result in longer recovery times. Summary of the Invention

[0006] The purpose of this invention is to address the problems existing in the prior art by providing a method to extend the service life of the main blast furnace feeding belt, main charging belt and its accessories.

[0007] Question (1) Prevention of tearing accidents in the main feeding and main loading belts. How to prevent long, sharp objects or large iron-containing objects buried in ore or coke from falling onto the main feeding and main loading belts during the transportation process? In case any escape, how to prevent them from falling vertically and causing damage or tearing to the belts?

[0008] Question (2) Handling of local damage to the main feeding and main loading belts. The service life of the main feeding and main loading belts is generally about 5 years. If properly maintained, they can be used for 6-7 years or even longer. When the belt is partially damaged but other parts are intact, it is not worthwhile to replace the entire belt. Therefore, the belt needs to be repaired to extend its service life.

[0009] Problem (3) The main feeding and main loading belt empty section cleaners are not durable. Ore and coke contain some dust, and when the equipment malfunctions, there will be problems of spillage and leakage. The tail pulleys of the belt conveyor are all rubber-coated pulleys. This dust and spilled / leaked material will be squeezed into the rubber coating as the belt travels through the belt. This not only damages the surface of the belt but also aggravates the wear of the pulleys and damages the equipment. Therefore, the role of the belt empty section cleaner is crucial. The belt empty section cleaner was originally made of polyurethane, which is not wear-resistant and sometimes needs to be replaced once a month. The maintenance cost is high, and the belt needs to be stopped for replacement, which is not conducive to the continuity of blast furnace production.

[0010] To achieve the above objectives, the technical solution adopted by the present invention is as follows:

[0011] Methods to extend the service life of the main blast furnace feed belt, main charging belt, and their accessories include:

[0012] Install several rows of wear-resistant mesh in the hopper below the feeding point of the vibrating screen;

[0013] At least one pair of cross rods are installed in the weighing hopper below the feeding hopper; an inclined discharge channel is provided below the weighing hopper, a manual gate is provided in the discharge channel, a gate is provided at the end of the discharge channel, and a main feeding belt is provided below the discharge channel;

[0014] A transfer hopper is provided between the main feeding belt and the main loading belt. An inclined transfer discharge channel is provided below the transfer hopper. The transfer discharge channel has an angle of 40 to 60 degrees with the tail direction of the main loading belt.

[0015] This method improves the feeding hopper, weighing hopper, and transfer hopper, enabling the removal of thin, sharp objects or large iron-containing objects from the material before it is conveyed to the main feeding belt and main charging belt of the blast furnace. This reduces the likelihood of belt damage and tearing, thereby extending the belt's service life. Timely maintenance ensures the normal operation of the belt, effectively preventing accidents such as unplanned blast furnace shutdowns and passive production stoppages.

[0016] The angle settings of the wear-resistant mesh, the crossbar, and the transfer discharge channel create a multi-layered protective effect, progressively removing harmful debris from the material and reducing the difficulty of modification. The wear-resistant mesh provides the first layer of protection, the crossbar provides the second layer, and the improved angle between the transfer discharge channel and the main feeding belt provides the third layer. By controlling the angles, materials such as ore and coke are prevented from impacting the belt perpendicularly during feeding, thus avoiding direct damage. In particular, sharp objects are prevented from directly puncturing the belt, avoiding belt tearing accidents. These protective measures work together to effectively extend the service life of the blast furnace main feeding belt, main charging belt, and their accessories.

[0017] Furthermore, one method of installing the wear-resistant mesh is as follows: a first wear-resistant rod is welded to the inner circumference of the hopper, and several first wear-resistant steel plates are welded onto the first wear-resistant rod, with a spacing of 200-400mm between adjacent first wear-resistant steel plates. Installing the first wear-resistant steel plates by welding ensures the stability and strength of the connection. An arc structure is provided at the weld joint between the first wear-resistant steel plate and the first wear-resistant rod to accommodate the rod.

[0018] Furthermore, the cross bar is a pair of second wear-resistant bars arranged in a cross configuration. The two ends of the second wear-resistant bars are respectively threaded and pass through the wall of the weighing hopper, and are fastened by nuts.

[0019] Furthermore, the manual gate is driven by gears, and is manually cranked to reciprocate. During normal production, it is in the open state and locked to prevent slippage; when maintaining and cleaning iron-containing objects, the manual gate is closed to allow personnel to stand.

[0020] Furthermore, the main feeding belt includes a horizontally arranged tail section and an upwardly inclined body. The transfer hopper is located between the end of the main feeding belt and the tail section. The transfer discharge channel is inclined at an angle of 55° towards the direction of the main feeding belt. This arrangement allows material exiting the transfer discharge channel to fall smoothly onto the main feeding belt, significantly reducing the impact force on the belt without hindering the material's descent. If the inclination angle is too small, it will affect the material's natural descent and cause blockages.

[0021] Furthermore, the interior of the transfer discharge channel is equipped with high-strength wear-resistant steel plates at the points where the material is impacted. The high-strength wear-resistant steel plates are connected by welding and arranged in a V-shape.

[0022] Using high-strength wear-resistant steel plates in the material impact area can improve the wear resistance and impact resistance of the hopper; the high-strength wear-resistant steel plates are all welded into a 90° angle, which can form some containment space, and some materials and dust will accumulate in the angle, forming a protective layer for material impact, thereby extending the service life of the transfer bucket.

[0023] Furthermore, the method also includes a step of modifying the belt empty section cleaners used on the main feeding belt and the main loading belt. This includes installing polyester belts at the contact points between the belt empty section cleaner and the main feeding belt or the main loading belt. The polyester belts are 8-10 mm thick and are connected to the main body of the belt empty section cleaner via bolts after drilling. The polyester belts are arranged in a V-shape, and multiple connecting rods are provided between the polyester belts. These improvements can reduce the friction between the belts and extend their service life.

[0024] Furthermore, the method also includes a repair method for locally damaged steel wires on the main feeding belt and the main loading belt: Select the size of the repair strip according to the damaged area and draw marking lines on the belt body; grind the area where the marking lines are located, with a grinding thickness not less than the thickness of the belt body; clean the grinding debris; use a cleaning agent to clean the oil and impurities on the surface of the belt body to keep the repair area clean; mix the adhesive and curing agent and apply it to the repair surface, wait for it to dry, and repeat the application multiple times; finally, straighten the repair strip and stick it to the repair surface, compact it, and remove any air bubbles from the bonding surface.

[0025] Furthermore, the method also includes a repair method for tears in the belt bodies of the main feeding belt and the main loading belt: if the belt body has been in use for a short time, the tear is repaired by directly clamping it with steel clips to reduce the gap at the tear; if the belt body has been in use for a long time, the following method is used for repair: drill holes on both sides of the tear in the belt body, then install steel clips, and tighten them with the bolts and nuts on the steel clips to completely tighten the gap in the belt body.

[0026] The above two methods of belt damage repair can extend the service life of the belt and provide a prerequisite for planned blast furnace maintenance, avoiding unplanned maintenance accidents caused by belt damage or tearing.

[0027] Furthermore, the method also includes an automated monitoring method for tearing or damage to the main feeding belt and the main loading belt: an image acquisition device and a laser emitter are respectively installed on both sides of the belt body. The image acquisition device and the laser emitter capture the status information of the working layer on the back of the belt body. The status information is transmitted to the controller and the host computer, and the status information is compared and judged. If an abnormality is found in the belt body, an alarm is triggered. If tearing or damage is found after on-site confirmation, repair is carried out.

[0028] Compared with the prior art, the beneficial effects of the present invention are as follows: 1. By improving the feeding hopper, the weighing hopper, and the transfer hopper, this method can remove slender, sharp objects or large iron-containing objects from the material before it is conveyed to the main charging belt and main conveyor belt of the blast furnace, reducing the probability of belt damage and tearing, thereby extending its service life. Timely maintenance can ensure the normal operation of the belt and effectively avoid accidents such as unplanned blast furnace shutdowns and passive production stoppages; 2. The angle settings of the wear-resistant mesh, the crossbar, and the transfer discharge channel can form a multi-layered protection effect, gradually removing harmful impurities from the material; by controlling the angle, materials such as ore and coke will not vertically impact the belt during the feeding process, and will not directly damage the belt, especially sharp objects. 1. Directly puncturing the belt avoids belt tearing accidents; 2. Belt damage repair can extend the belt's service life and provide a prerequisite for planned blast furnace maintenance, avoiding unplanned maintenance accidents caused by belt damage or tearing; 3. Modifying the belt empty section cleaner can extend its service life and reduce the probability of dust, ore, or coke entering the tail roller of the belt conveyor, causing tail roller wear, extending the tail roller's service life, and ensuring long-term stable smooth operation of the belt; 4. High-strength wear-resistant steel plates are welded into a 90° angle, and some materials and dust will accumulate on the angle, forming a protective layer for material feeding, thereby extending the service life of the transfer bucket; 5. Through the setting of the aforementioned automated monitoring methods and devices, abnormal conditions on the main feeding belt and the main loading belt can be detected in a timely manner, so that staff can repair and maintain the belt in a timely manner. Attached Figure Description

[0029] Figure 1 This is a schematic diagram of the overall structure of the extended blast furnace main feeding belt, main charging belt and its accessories according to the present invention.

[0030] Figure 2 This is a schematic diagram of the belt empty section cleaner of the present invention;

[0031] Figure 3 This is a schematic diagram of the layout of the automated belt abnormality monitoring device of the present invention;

[0032] In the diagram: 1. Hopper; 2. Feeder; 3. Vibrating screen; 4. Return conveyor belt; 5. Discharge hopper; 6. Wear-resistant mesh; 7. Weighing hopper; 8. Cross bar; 9. Manual gate; 10. Gate; 11. Main feeding conveyor belt; 12. Transfer hopper; 13. Transfer discharge channel; 14. Main feeding conveyor belt; 15. Belt empty section cleaner; 16. Polyester belt; 17. Connecting rod; 18. Upper idler roller; 19. Laser emitter; 20. Image acquisition device; 21. Lower idler roller; 22. Card reader; 23. Encoder; 24. Controller; 25. Host computer. Detailed Implementation

[0033] The technical solution of the present invention will now be clearly and completely described with reference to the accompanying drawings. Obviously, the described embodiments are merely 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.

[0034] In the description of this invention, it should be noted that the terms "middle," "upper," "lower," "left," "right," "inner," and "outer," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are used only for the convenience of describing this invention and for simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this invention. Furthermore, the terms "first," "second," etc., are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0035] like Figure 1 As shown, a method for extending the service life of the main blast furnace feeding belt, main charging belt and its accessories includes:

[0036] Install several rows of wear-resistant mesh 6 in the hopper 5 below the feeding point of the vibrating screen 3;

[0037] At least one pair of cross rods 8 are installed in the weighing hopper 7 below the feeding hopper 5; an inclined discharge channel is provided below the weighing hopper 7, a manual gate 9 is provided in the discharge channel, a fan-shaped gate 10 is provided at the end of the discharge channel, and a main feeding belt 11 is provided below the discharge channel.

[0038] A transfer bucket 12 is provided between the main feeding belt 11 and the main feeding belt 14. An inclined transfer discharge channel 13 is provided below the transfer bucket 12. The transfer discharge channel 13 has an angle of 40 to 60° with the tail direction of the main feeding belt 14.

[0039] This method improves the feeding hopper 5, the weighing hopper 7, and the transfer hopper 12, enabling the removal of thin, sharp objects or large iron-containing objects from the material before it is conveyed to the blast furnace main feeding belt 11 and the main charging belt 14. This reduces the likelihood of belt damage and tearing, thereby extending the belt's service life. Timely maintenance ensures the normal operation of the belt, effectively preventing accidents such as unplanned blast furnace shutdowns and passive production stoppages.

[0040] The angle settings of the wear-resistant mesh 6, the cross bar 8, and the transfer discharge channel 13 can form a multi-layer protection effect, gradually cleaning out harmful debris from the material and reducing the difficulty of modification.

[0041] Upstream of the vibrating screen 3 are the feeder 2 and the silo 1, and below the vibrating screen 3 is a return conveyor belt 4. Sintered ore and coke produced from sintering and coking, as well as lump ore and pellets transported from outside, are conveyed to the silo 1 via the conveyor belt above the trough. After being screened by the feeder below the trough and the vibrating screen, the material falls into the discharge hopper 5. When the material passes through the gap in the middle of the wear-resistant mesh 6, thin, sharp objects or large iron-containing objects buried in the ore and coke will get stuck in the wear-resistant mesh 6. During routine inspections, the staff can open the cover to find these objects and remove them. The wear-resistant mesh 6 is the first layer of protection.

[0042] The cross bar 8 is installed in the middle of the weighing hopper 7, which can form a long blocking structure in the material flow channel. It can block and hold larger debris, and can also block the wear-resistant mesh that falls off due to material impact, thus playing a second protection role.

[0043] A manual gate 9 is installed inside the fan-shaped gate 10 above the main feeding belt 11. When cleaning iron-containing objects, personnel can stand on the gate's insert plate to avoid accidents caused by gate depressurization or other reasons causing personnel to fall. It not only facilitates the cleaning of accumulated debris but also provides safety protection.

[0044] Normally, to reduce wear inside the hopper, the transfer bucket 12 has a small inclination angle. Materials such as ore and coke fall vertically at a 90° angle onto the conveyor belt, increasing wear on the main feeding belt and making it susceptible to puncture by sharp objects. By changing the inclination angle of the discharge channel 13 below the transfer bucket 12, based on actual site conditions, the angle between the transfer discharge channel 13 and the main feeding belt is approximately 50°. This prevents ore and coke from impacting the belt vertically during discharge, avoiding direct damage. Sharp objects are especially prevented from puncturing the belt; even if some sharp objects remain, they will either become lodged at the discharge port or enter the blast furnace with the ore and coke, preventing belt tearing. This angle improvement provides a third layer of protection.

[0045] Furthermore, one installation method for the wear-resistant mesh 6 is as follows: the first wear-resistant rod is welded to the inner circumference of the hopper, and several first wear-resistant steel plates are welded onto the first wear-resistant rod, with a spacing of 200-400mm between adjacent first wear-resistant steel plates.

[0046] The first wear-resistant steel plate is installed by welding, which ensures the stability and strength of the connection between the wear-resistant steel plates. An arc structure is provided at the welding point between the first wear-resistant steel plate and the first wear-resistant rod to accommodate the rod.

[0047] In some embodiments, the first wear-resistant rod is a Φ38mm wear-resistant round steel, and the first wear-resistant steel plate is a 100mm*300mm*20mm ultra-strong wear-resistant steel plate; the 200-400mm interval can ensure the passage of large pieces of material.

[0048] In some embodiments, strong magnets may be embedded in the first wear-resistant steel plate or the first wear-resistant rod, which can effectively retain large pieces of iron through magnetic attraction.

[0049] Furthermore, the cross bar 8 is a pair of second wear-resistant bars arranged in a cross pattern. The two ends of the second wear-resistant bars are respectively threaded and pass through the wall of the weighing hopper, and are fastened by nuts.

[0050] Due to the reduced space below the weighing hopper 7, a cross bar is made using the second wear-resistant rod of M42. The second wear-resistant rod has M42 threads at both ends, which can be directly tightened with nuts. It only needs to be checked periodically, and replacement is also relatively convenient.

[0051] Furthermore, the manual gate 9 adopts gear transmission, and the gate is manually cranked to reciprocate. During normal production, it is in the open state and locked to prevent slippage; when maintaining and cleaning iron-containing objects, the manual gate is closed to allow personnel to stand.

[0052] Furthermore, the main feeding belt 14 includes a horizontally arranged tail section and an upwardly inclined body. The transfer bucket 12 is located between the end of the main feeding belt 11 and the tail section. The transfer discharge channel 13 is inclined towards the conveying direction of the main feeding belt 14 at an angle of 55°. This arrangement allows the material exiting the transfer discharge channel 13 to fall smoothly onto the main feeding belt 14, greatly reducing the impact force on the belt without affecting the smooth descent of the material. If the inclination angle is too small, it will affect the material's natural descent and cause blockage.

[0053] Furthermore, the interior of the transfer discharge channel 13 is equipped with high-strength wear-resistant steel plates at the points where materials are impacted. The high-strength wear-resistant steel plates are connected by welding and arranged in a V-shape.

[0054] Using high-strength wear-resistant steel plates in the material impact area enhances the hopper's wear resistance and impact resistance. The high-strength wear-resistant steel plates are all welded at a 90° angle, creating a containment space where some material and dust accumulate, forming a protective layer and extending the service life of the transfer hopper. Current conventional practices avoid angles to prevent material and dust accumulation, but this application overcomes this technical bias; the angle at this location provides unexpected protection.

[0055] The high-strength wear-resistant steel plate is available in two sizes, 100mm*200mm*20mm and 100mm*300mm*20mm, depending on the field application. The welding method adopted is V-shaped welding, with a firm weld on the back of the steel plate (the side that the material cannot hit). The advantage of this welding method is that the material can accumulate in the V-shape, thus forming a material-grinding effect and extending the service life of the hopper.

[0056] Furthermore, such as Figure 2 As shown, the method further includes a step of modifying the belt empty section cleaners used on the main feeding belt and the main loading belt, including setting a polyester belt 16 at the contact point between the belt empty section cleaner 15 and the main feeding belt or the main loading belt. The polyester belt 16 has a thickness of 8-10mm. The polyester belt 16 is connected to the main body of the belt empty section cleaner by bolts after drilling. The polyester belt 16 is arranged in a V-shape, and multiple connecting rods 17 are also provided between the polyester belts 16.

[0057] The part of the belt empty section cleaner 15 that contacts the belt is also replaced with a material similar to the belt material. The modified belt directly contacts the non-working surface of the main feeding and main loading belts in operation. The materials with the same coefficient of friction come into contact with each other, which is very wear-resistant and has a service life of more than one year. Moreover, it can be made from the waste belts that have been replaced, which also saves costs.

[0058] The modification of the belt empty section cleaner 15 can extend its service life and reduce the chance of dust, ore or coke entering the tail roller of the belt conveyor and causing wear on the tail roller, thus extending the service life of the tail roller and ensuring the long-term stable smooth operation of the belt.

[0059] Furthermore, the method also includes a repair method for locally damaged steel wires on the main feeding belt and the main loading belt: select the size of the repair strip according to the damaged area and draw a marking line on the belt body; grind the area where the marking line is located, with a grinding thickness not less than the thickness of the belt body; clean the debris after grinding, and use a cleaning agent to clean the oil and impurities on the surface of the belt body to keep the repair area clean in order to improve the bonding strength; mix the adhesive and the curing agent and apply it to the repair surface, wait for it to dry, and repeat the application multiple times (at least two applications); finally, straighten the repair strip and stick it to the repair surface, press it firmly, and remove the air bubbles at the bonding surface, which can be done by hammering out the air bubbles.

[0060] Furthermore, the method also includes a repair method for tears in the belt bodies of the main feeding belt and the main loading belt: if the belt body has been in use for a short time, the tear can be repaired by nailing steel clips to tighten it, so that the gap at the tear is smaller. This method can temporarily maintain production, but there will be material leakage. It is necessary to arrange personnel to replace the tear as soon as possible.

[0061] If the belt body has been in use for a long time, it shall be repaired in the following way: drill holes on both sides of the torn part of the belt body, then install steel clips, and tighten them with the bolts and nuts on the steel clips to completely tighten the gap of the belt body.

[0062] Repairing belt damage can extend the service life of the belt and provide a prerequisite for planned blast furnace maintenance, thus avoiding unplanned maintenance accidents caused by belt damage or tearing.

[0063] Furthermore, such as Figure 3 As shown, the method also includes an automated monitoring method for tearing or damage to the main feeding belt and the main loading belt: an image acquisition device 20 and a laser emitter 19 are respectively installed on both sides of the belt body. The image acquisition device 20 and the laser emitter 19 capture the status information of the working layer on the back of the belt body. The status information is transmitted to the controller 24 and the host computer 25, and the status information is compared and judged. If an abnormality is found in the belt body, an alarm is triggered. If tearing or damage is found after on-site confirmation, repair is carried out.

[0064] The main devices used in this automated monitoring method include an image acquisition device 20 (such as a camera, video camera, etc.), a laser emitter 19, a controller 24 (such as an intelligent PLC controller), a host computer 25, an encoder 23, a card reader 22, and an alarm. The image acquisition device 20 and the laser emitter 19 are respectively set near the upper idlers 18 on both sides below the belt body. The card reader 22 (including a chip) and the encoder 23 are set on one side of the lower idler 21 of the belt body. The controller 24, the host computer 25, and the alarm can be arranged in the control room, and data transmission is carried out through network cables and wiring is carried out through electrical cables, thereby realizing the function of tear-resistant laser detection.

[0065] The image acquisition device 20 illuminates the back of the belt body using a surface as a reference; the laser emitter 19 illuminates the back of the belt body using a line as a reference, assisting the controller 24 in judging abnormal information of the belt body. The information captured by the image acquisition device 20 and the laser emitter 19 is compared with the belt tear status information stored in the controller. If such information is found, the belt will stop and issue an alarm. After the belt stops, personnel will immediately go to the site to confirm. If it is confirmed to be a tear, it will be dealt with in time. If it is a false alarm, the belt will be started directly to resume production.

[0066] The function of the card reader 22 is to recalibrate the zero position after the belt rotates one revolution. Since the belt length is fixed, but there will be errors in data reading during operation, the card reader can ensure that the zero position is accurate and the data is accurate after the belt rotates one revolution.

[0067] The function of the encoder 23 is to record the specific position of the belt during operation, especially the location where the belt is torn and how far it is from the zero point, so that on-site personnel can quickly find the torn or faulty parts.

[0068] The function of the host computer 25 is to display fault information and equipment operation information on the display screen, so as to facilitate querying and setting of information.

[0069] The image acquisition device 20 and the laser emitter 19 irradiate the working layer on the back of the belt body. This working layer is free of material during normal production, which facilitates laser irradiation and image acquisition. The card reader and the encoder are installed on the non-working surface of the belt body and can record the belt's operating status information.

[0070] By setting up the automated monitoring method and device, abnormalities (such as damage or tearing) on ​​the main feeding belt and the main loading belt can be detected in a timely manner, so that staff can carry out timely repairs, avoid the problem from escalating, and timely repairs can also ensure the service life of the belt and reduce the occurrence of unplanned maintenance accidents.

[0071] 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 of prolonging the service life of the main feed and main charging belt of a blast furnace and its accessories, characterized in that, include: Install several rows of wear-resistant mesh in the hopper below the feeding point of the vibrating screen; At least one pair of cross rods are installed in the weighing hopper below the feeding hopper; an inclined discharge channel is provided below the weighing hopper, a manual gate is provided in the discharge channel, a gate is provided at the end of the discharge channel, and a main feeding belt is provided below the discharge channel; A transfer bucket is provided between the main feeding belt and the main loading belt. An inclined transfer discharge channel is provided below the transfer bucket. The transfer discharge channel has an angle of 40 to 60° with the tail direction of the main loading belt. The method further includes a step of modifying the belt empty section cleaners used on the main feeding belt and the main loading belt, including installing a polyester belt at the contact point between the belt empty section cleaner and the main feeding belt or the main loading belt. The polyester belt has a thickness of 8-10mm. The polyester belt is connected to the main body of the belt empty section cleaner by bolts after drilling. The polyester belt is arranged in a V-shape, and multiple connecting rods are provided between the polyester belts. The method also includes a repair method for locally damaged steel wires on the main feeding belt and the main loading belt: Select the size of the repair strip according to the damaged area and draw marking lines on the belt body; grind the area where the marking lines are located, with a grinding thickness not less than the thickness of the belt body; clean the grinding debris; use a cleaning agent to clean the oil and impurities on the surface of the belt body to keep the repair area clean; mix the adhesive and hardener and apply it to the repair surface, wait for it to dry, and repeat the application multiple times; finally, straighten the repair strip and stick it to the repair surface, press it firmly, and remove air bubbles from the bonding surface. The method also includes a repair method for tears in the belt bodies of the main feeding belt and the main loading belt: if the belt body has been in use for a short time, the tear is repaired by directly nailing steel clips to tighten it, so that the gap at the tear is smaller; if the belt body has been in use for a long time, the following method is used for repair: drill holes on both sides of the tear in the belt body, then install steel clips, and tighten them with the bolts and nuts on the steel clips to completely tighten the gap in the belt body; The method also includes an automated monitoring method for tearing or damage to the main feeding belt and the main loading belt: an image acquisition device and a laser emitter are respectively installed on both sides of the belt body. The image acquisition device and the laser emitter capture the status information of the working layer on the back of the belt body. The status information is transmitted to the controller and the host computer, and the status information is compared and judged. If an abnormality is found in the belt body, an alarm is triggered. If tearing or damage is found after on-site confirmation, repair is carried out.

2. The method of prolonging the service life of the main feed and charging belts of blast furnaces and their accessories according to claim 1, characterized in that, One installation method for the wear-resistant mesh is as follows: the first wear-resistant rod is welded to the inner circumference of the hopper, and several first wear-resistant steel plates are welded onto the first wear-resistant rod, with a spacing of 200-400mm between adjacent first wear-resistant steel plates.

3. The method of extending the service life of the main feed and charging belts of a blast furnace and their accessories according to claim 1, characterized in that, The cross bar is a pair of second wear-resistant bars arranged in a cross configuration. The two ends of the second wear-resistant bars are respectively threaded and pass through the wall of the weighing hopper, and are fastened by nuts.

4. The method of prolonging the service life of the main feed and charging belts of blast furnaces and their accessories according to claim 1, characterized in that, The manual gate is driven by gears and is manually cranked to reciprocate. During normal production, it is in the open state and locked to prevent slippage. When maintaining and cleaning iron-containing objects, the manual gate is closed to allow personnel to stand.

5. The method of prolonging the service life of the main feed and charging belts of blast furnaces and their accessories according to claim 1, characterized in that, The main feeding belt includes a horizontally arranged tail section and an upwardly tilted body. The transfer bucket is located between the end of the main feeding belt and the tail section. The transfer discharge channel is inclined in the direction of the main feeding belt, with an included angle of 55°.

6. The method of prolonging the service life of the main feed and charging belts of blast furnaces and their accessories according to claim 1, characterized in that, The interior of the transfer discharge channel is equipped with high-strength wear-resistant steel plates at the points where materials are impacted. These high-strength wear-resistant steel plates are connected by welding and arranged in a V-shape.

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