Process and equipment for removing impurities and upgrading spent magnesia-chrome brick material

Abstract

The present application relates to the technical field of post-magnesite-chrome brick recycling processing, and particularly discloses a post-magnesite-chrome brick recycling material impurity removal and quality improvement process and equipment, which comprises the following steps: S1: classifying and picking the post-magnesite-chrome bricks; S2: removing large impurities on the surface of the post-magnesite-chrome bricks; S3: crushing the post-magnesite-chrome bricks to a required granularity; and S4: removing magnetic metal impurities in the material to improve the purity of the recycling material. The post-magnesite-chrome bricks are crushed, and the crushed pieces are screened at the same time. In the screening process, the connecting part can adsorb the magnetic metal impurities. Therefore, the crushing, screening and impurity removal processes are integrated, and linkage efficient operation can be realized to improve the overall operation efficiency. In addition, the force applying group cooperates with the material pushing group, the filter screen can be cleaned through the vibration of the filter screen itself, and the problem that the overall operation efficiency is relatively poor because the post-magnesite-chrome bricks after crushing still need to be additionally screened and impurity removed is solved.

Description

Technical Field

[0001] This invention relates to the field of post-magnesia-chrome brick recycling technology, specifically to a process and equipment for removing impurities and improving the quality of post-magnesia-chrome brick recycled materials. Background Technology

[0002] Recycled magnesia-chrome bricks refer to magnesia-chrome refractory bricks that have been decommissioned from industrial kilns such as those used in steel and cement industries. After impurity removal, crushing, screening, and harmless treatment, recycled aggregates or powders are obtained, which can partially replace the original raw materials in new refractory products or metallurgical auxiliaries.

[0003] Currently, when processing recycled magnesia-chrome bricks, a hammer crusher is required. The hammer crusher pulverizes the magnesia-chrome bricks by striking them with a high-speed rotating hammer. After some of the magnesia-chrome bricks are crushed, the magnetic metal impurities inside are removed. Afterward, workers need to use magnetic suction equipment to clean the magnetic metal impurities after crushing. This process requires an extra step and affects the overall work progress. Summary of the Invention

[0004] The purpose of this invention is to provide a process and equipment for impurity removal and quality improvement of recycled magnesia-chrome bricks. This invention simultaneously crushes the magnesia-chrome bricks and screens the fragments. During the screening process, the hollow cylinder moves back and forth, and through the cooperation of the connecting parts, it can adsorb magnetic metal impurities. This integrates the crushing, screening, and impurity removal processes, enabling efficient and coordinated operation and improving overall work efficiency. Furthermore, during screening and impurity removal, the force application group and the material pushing group work together to clean the interior of the filter screen through its own vibration, ensuring screening effectiveness. This solves the problem that some current equipment has limited functionality, requiring additional screening and impurity removal steps after crushing the magnesia-chrome bricks, resulting in relatively poor overall work efficiency.

[0005] To achieve the above objectives, the present invention provides the following technical solution: a process for removing impurities and upgrading recycled magnesia-chrome bricks, comprising the following steps: S1: Sort and select the post-magnesium chrome bricks; S2: Remove large impurities from the surface of the magnesium chrome brick; S3: Crush the post-magnesium chrome bricks to the required particle size; S4: Removes magnetic metal impurities from materials to improve the purity of recycled materials; S5: Screen and classify recycled materials according to particle size; S6: Hydration treatment eliminates free CaO in the magnesia-chrome bricks and softens and removes hydrated substances.

[0006] A device for removing impurities and upgrading recycled magnesia-chrome bricks for implementing the above-mentioned process includes a crushing unit for crushed magnesia-chrome bricks. The crushing unit includes a main frame, a drive shaft that rotates through the main frame, and a crushing hammer fixed to the surface of the drive shaft. A multi-groove pulley is fitted onto the surface of the drive shaft, and the two multi-groove pulleys are connected by a first belt drive. The device also includes: The base is fixed to the bottom of the main frame; A filter screen extends through the surface of the base, with one end of the filter screen fixed to the surface of the base. Support rollers are fixed on both sides of the inner wall of the base, and the support rollers are positioned below the filter screen. The force application assembly is installed on the base. The force application assembly includes a guide part installed on the base, a pull plate fixed to one end of the filter screen, and a storage box fixed to the surface of the base. An extension frame is provided on the surface of the storage box. A squeezing part is provided inside the storage box and the extension frame. The force application assembly is connected to the filter screen and is used to intermittently change the tension of the filter screen to make it vibrate. The material pusher assembly is mounted on the base. The material pusher assembly includes a connecting part and two hollow cylinders movably mounted inside the base. The two hollow cylinders are respectively mounted on the upper and lower sides of the filter screen. The connecting part includes a magnetic rod that rotates through the hollow cylinder and a moving component mounted on one end of the magnetic rod. A cleaning component is installed inside the hollow cylinder.

[0007] Preferably, the moving component includes: The vertical plate is slidably connected to the base surface; A two-way lead screw with threads penetrating the vertical plate; A reinforcing rod is fixed to one end of the double-acting screw. The housing is fixed to the surface of the base; A protruding rod rotates through the surface of the housing; The first gear assembly is disposed between the protruding rod and the reinforcing rod; A double-groove pulley is fixed to one end of a protruding rod, and a second belt is connected to the surface of the double-groove pulley and the multi-groove pulley for transmission.

[0008] Preferably, a sliding plate is fixed to the surface of the vertical plate, the magnetic rod rotates through the sliding plate, a groove is opened on one side of the base, the surface of the sliding plate is slidably connected to the inner wall of the groove, and accordion covers are fixed to both sides of the sliding plate, with the end of the accordion cover away from the sliding plate fixed to the inside of the groove.

[0009] Preferably, a bending frame is fixed to one side of the base surface and a through groove is formed therein, the surface of the hollow cylinder is in contact with the inner wall of the through groove, and the cleaning assembly includes: The scraper sleeve is slidably mounted on the surface of the magnetic rod. A hollow frame is fixed to the surface of the scraper. A bracket is fixed to the surface of a hollow frame, and a protective shell is fixed to the surface of the bracket. The protective shell is slidably sleeved on the surface of the bending frame. A horizontal plate is fixed to one side of the bracket; A rotating shaft passes through the top of the horizontal plate, and the surface of the rotating shaft contacts the inner wall of the bending frame.

[0010] Preferably, the hollow cylinder is rotatably fitted with a kit, the surface of the kit is slidably connected to the inner wall of the through groove, both sides of the kit are fixed with partitions, the surface of the base is provided with a cavity, and the surface of the partition is slidably connected to the inner wall of the cavity.

[0011] Preferably, the guide portion includes: The guide tube is fixed to the surface of the base; An extension rod slides through the end of the guide tube away from the base, and the end of the extension rod located outside the guide tube is fixed to the pull plate. A spring is installed on the inner wall of the guide tube, with its two ends abutting against the inner wall of the guide tube and one end of the extension rod, respectively.

[0012] Preferably, the extrusion section includes: A bare rod that rotates through the storage box; A cam rotates through the top of the extension frame, and the surface of the cam contacts the surface of the pull plate; A rotating component that rotates through the top of the storage box; The second gear assembly is disposed between the rotating part and the guide rod; The transmission assembly is located between the rotating component and the cam.

[0013] Preferably, the first gear assembly includes a first gear ring and a second gear fixed on the surface of the reinforcing rod, the first gear meshing with the second gear, and the second gear assembly includes a first gear ring and a second gear ring respectively fixed on the guide rod and the rotating member, the first gear ring and the second gear ring meshing with each other.

[0014] Preferably, the transmission assembly includes synchronous pulleys fixed on the rotating component and the cam respectively, and a synchronous belt is connected between the two synchronous pulleys.

[0015] Compared with the prior art, the beneficial effects of the present invention are as follows: This invention uses a filter screen to initially screen crushed magnesia-chrome bricks. During the screening process, the hollow cylinder moves back and forth, and through the cooperation of the connecting parts, it can adsorb magnetic metal impurities. In this way, the crushing, screening, and impurity removal processes are integrated, enabling coordinated and efficient operation and improving overall work efficiency. In addition, during the screening and impurity removal processes, the force application group and the material pushing group work together to clean the inside of the filter screen through its own vibration, ensuring the screening effect. This solves the problem that some current equipment has a single function, and the crushed magnesia-chrome bricks still need to undergo additional screening and impurity removal steps, resulting in poor overall work efficiency. Attached Figure Description

[0016] Figure 1 This is a three-dimensional structural diagram of the present invention; Figure 2 This is a three-dimensional structural schematic diagram from another perspective of the present invention; Figure 3 This is a three-dimensional structural diagram of the present invention with both the main frame and the base cut out. Figure 4 This is a three-dimensional structural diagram of the present invention after the crushing unit has been dismantled; Figure 5 This is a three-dimensional structural diagram of the present invention after the filter screen has been removed; Figure 6 This is a three-dimensional structural diagram of the present invention, showing the storage box, extension frame, and hollow cylinder cut open and the extension frame removed. Figure 7 This is a three-dimensional structural diagram of the connecting part and the extrusion part in this invention; Figure 8 This is a three-dimensional structural diagram of the present invention with the base and one side guide portion cut open; Figure 9 This is a three-dimensional structural diagram of the present invention with the protective shell removed and the vertical plate and one side of the protective shell cut open; Figure 10 For the present invention Figure 8 A magnified structural diagram of point A in the middle.

[0017] In the diagram: 100, Crushing assembly; 110, Main frame; 120, Drive shaft; 130, Crusher hammer; 200, Base; 300, Support roller; 400, Filter screen; 500, Force application assembly; 510, Guide section; 520, Pulling plate; 530, Storage box; 540, Extension frame; 550, Extrusion section; 551, Smooth rod; 552, Second gear assembly; 553, Cam; 554, Transmission assembly; 555, Rotating component; 600, Pushing assembly; 610, Hollow cylinder; 620 621. Connecting part; 622. Magnetic rod; 622. Moving component; 6221. Vertical plate; 6222. Two-way lead screw; 6223. Reinforcing rod; 6224. Protruding rod; 6225. First gear assembly; 6226. Housing; 623. Slide plate; 624. Cleaning component; 6241. Scraper; 6242. Hollow frame; 6243. Support; 6244. Horizontal plate; 6245. Rotating shaft; 630. Kit; 640. Partition; 700. Bending frame; 800. Protective shell. Detailed Implementation

[0018] The technical solutions of 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.

[0019] Please see Figures 1-10A process for removing impurities and upgrading recycled magnesia-chrome bricks involves first visually inspecting the bricks to separate those heavily coated with slag and severely deteriorated layers from the relatively intact bricks. Next, large impurities such as steel scraps and iron sheets attached to the surface of the magnesia-chrome bricks are removed. The pre-treated magnesia-chrome bricks are then fed into a crushing device. This process primarily uses a jaw crusher to crush the material to below 25mm, followed by a hammer crusher to process it into the required particle size. Screening and demagnetization are then used to improve the purity of the recycled material. Finally, a hydration reaction softens and removes some impurities, such as attached hydrated substances. The equipment used in this process includes a crushing unit 100, which comprises a main frame 110, a drive shaft 120 rotating through the main frame 110, and a fixed... The drive shaft 120 has a breaker hammer 130 mounted on its surface. Connecting the drive shaft 120 to an external power source allows the breaker hammer 130 to rotate within the main frame 110, thus crushing the magnesia-chrome bricks. A multi-groove pulley is fitted onto the surface of the drive shaft 120, and the two pulleys are connected by a first belt drive, enabling synchronous rotation of both drive shafts 120 by the same power source. A base 200 is fixed to the bottom of the main frame 110, supporting the crushing assembly 100 and providing space for the falling bricks to descend. A filter screen 400 runs through the surface of the base 200, with one end fixed to the surface. Support rollers 300 are fixed to both sides of the inner wall of the base 200. The support roller 300 is positioned below the filter screen 400 to support it. A force-applying assembly 500 is mounted on the base 200, and a pusher assembly 600 is also mounted on the base 200. The pusher assembly 600 includes two hollow cylinders 610 movably disposed inside the base 200, with the two cylinders 610 positioned on the upper and lower sides of the filter screen 400 respectively. The pusher assembly 600 also includes a connecting part 620, which includes a magnetic rod 621 rotatably penetrating the hollow cylinder 610 and a moving component 622 disposed at one end of the magnetic rod 621. The moving component 622 includes a vertical plate 6221 slidably connected to the surface of the base 200, a bidirectional lead screw 6222 threaded through the vertical plate 6221, and a component fixed to one end of the bidirectional lead screw 6222. The reinforcing rod 6223 is attached to the end of the base 200. A housing 6226 is fixed to the surface of the base 200. A protruding rod 6224 rotatably passes through the surface of the housing 6226. A first gear assembly 6225 is provided between the protruding rod 6224 and the reinforcing rod 6223. The first gear assembly 6225 includes a first gear ring and a second gear fixed to the surface of the reinforcing rod 6223. The first gear meshes with the second gear, and the first gear assembly 6225 is located inside the housing 6226. A double-groove pulley is fixed to the end of the protruding rod 6224 away from the reinforcing rod 6223. A second belt is connected to the surface of the double-groove pulley and the multi-groove pulley for transmission. Thus, when the drive shaft 120 rotates, the protruding rod 6224, the first gear assembly 6225, and the reinforcing rod 6223 work together.The rotation of the bidirectional lead screw 6222 drives the vertical plate 6221 to move. The vertical plate 6221 then slides on the surface of the base 200, allowing for stable movement. A sliding plate 623 is fixed to the surface of the vertical plate 6221, and the magnetic rod 621 rotates through the sliding plate 623. A groove is formed on one side of the base 200, and the surface of the sliding plate 623 slides in connection with the inner wall of the groove. Bellows covers are fixed to both sides of the sliding plate 623, with the end of the bellows cover furthest from the sliding plate 623 fixed to the inside of the groove. The bellows cover, in conjunction with the sliding plate 623, can shield the groove, reducing the spillage of broken magnesia-chrome bricks. The bidirectional lead screw 6222 rotates and passes through the vertical plate 6221... When the actuating plate 6221 drives the magnetic rod 621 to move laterally, it can drive the hollow cylinder 610 to move on the filter screen 400, thereby pushing the magnesium chrome brick fragments on the filter screen 400 to move, reducing the blockage caused by the long-term accumulation of some fragments. By pushing, the angle of the fragments can be adjusted and the movement of the fragments can be increased, thereby assisting the fragments to be screened and fall off by the filter screen 400. The hollow cylinder 610 is equipped with a cleaning component 624. The cleaning component 624 includes a scraper 6241 that is slidably sleeved on the surface of the magnetic rod 621, a hollow frame 6242 that is fixed on the surface of the scraper 6241, and a bracket 6243 that is fixed through the surface of the hollow frame 6242. A horizontal crossbar is fixed on one side of the bracket 6243. A rotating shaft 6245 is rotatably inserted through the top of a plate 6244. A bending frame 700 with a through groove is fixed to one side of the surface of the base 200. The surface of the hollow cylinder 610 contacts the inner wall of the through groove, and the surface of the rotating shaft 6245 contacts the inner wall of the bending frame 700. When the hollow cylinder 610 moves laterally, the cooperation between the rotating shaft 6245 and the bending frame 700 allows the plate 6244 to pull the hollow frame 6242 axially. This, in turn, causes the scraper 6241 to move laterally across the surface of the magnetic rod 621, thereby scraping away the magnetic metal impurities adsorbed on the surface of the magnetic rod 621 and continuously pushing the magnetic metal impurities towards the outside of the hollow cylinder 610. To clean magnetic metal impurities, a protective shell 800 is fixed to the surface of the support 6243. The protective shell 800 slides on the surface of the bending frame 700, shielding the bending frame 700 and reducing the possibility of magnetic metal impurities splashing onto the bending frame 700 through the hollow cylinder 610. A kit 630 is rotatably fitted onto the surface of the hollow cylinder 610. The surface of the kit 630 is slidably connected to the inner wall of the channel. Partitions 640 are fixed to both sides of the kit 630. A cavity is opened on the surface of the base 200. The surface of the partitions 640 is slidably connected to the inner wall of the cavity. The partitions 640 and the kit 630 cooperate to shield the channel, reducing the spillage of fragments of the magnesia-chrome brick through the channel.

[0020] The force application assembly 500 includes a guide portion 510 mounted on the base 200. The guide portion 510 includes a guide tube fixed to the surface of the base 200. An extension rod slides through the end of the guide tube away from the base 200. A spring is provided on the inner wall of the guide tube, and the two ends of the spring abut against the inner wall of the guide tube and one end of the extension rod, respectively. A pulling plate 520 is fixed to one end of the filter screen 400. The end of the extension rod located outside the guide tube is fixed to the pulling plate 520. Under the action of the spring force, the pulling plate 520 moves closer to the base 200. A storage box 5 is fixed to the surface of the base 200. 30. An extension frame 540 is fixed to the surface of the storage box 530, and the extension frame 540 is connected to the storage box 530. A pressing part 550 is provided inside the storage box 530 and the extension frame 540. The pressing part 550 includes a light rod 551 that rotates through the storage box 530. A rotating member 555 and a cam 553 rotate through the top of the storage box 530 and the top of the extension frame 540, respectively. A second gear assembly 552 is provided between the rotating member 555 and the light rod 551. The second gear assembly 552 includes a first gear ring that is fixed to the light rod 551 and the rotating member 555, respectively. The first gear ring and the second gear ring mesh with each other. Through the cooperation of the second gear assembly 552, the rotation of the bidirectional lead screw 6222 can be transmitted to the guide rod 551. Then, through the cooperation of the first gear ring and the second gear ring, the rotating part 555 is driven to rotate. A transmission group 554 is provided between the rotating part 555 and the cam 553. The transmission group 554 includes synchronous pulleys fixed on the rotating part 555 and the cam 553 respectively. A synchronous belt is connected between the two synchronous pulleys. Through the setting of the transmission group 554, when the rotating part 555 rotates, it can drive the cam 553 to rotate synchronously. When the cam 553 rotates, its surface comes into contact with the surface of the pull plate 520. The rotation of the cam 553 can intermittently drive the pull plate 520 to move laterally, moving the pull plate 520 away from the base 200. At this time, the filter screen 400 is taut. Then, the pushing force of the cam 553 on the pull plate 520 decreases, and the pull plate 520 moves closer to the pull plate 520 under the action of the spring force in the guide part 510. At this time, the tension on the filter screen 400 decreases. After that, the filter screen 400 is taut again. The vibration generated by the filter screen 400 itself can clear the debris stuck inside, reduce clogging, and ensure the screening effect.

[0021] The surface of the bidirectional lead screw 6222 is fitted with a freely retractable protective cover. The two ends of one protective cover are fixed to the surface of the housing 6226 and the vertical plate 6221, respectively, and the two ends of the other protective cover are fixed to the surface of the storage box 530 and the vertical plate 6221, respectively.

[0022] Working principle: The operator connects one drive shaft 120 to an external power source, causing it to rotate. This rotation, via a multi-groove pulley and a first belt, drives both drive shafts 120 to rotate simultaneously. The two breaker hammers 130 rotate accordingly, thus crushing the magnesia-chrome bricks. During crushing, the multi-groove pulley, double-groove pulley, and second belt work together to rotate the cam 6224, which in turn drives the reinforcing rod 6223 to rotate via the first gear set. As the reinforcing rod 6223 rotates, the bidirectional lead screw 6222 rotates, causing the vertical plate 6221 to move reciprocally laterally. Simultaneously, the hollow cylinder 610 moves reciprocally inside the base 200, pushing the broken pieces of magnesia-chrome bricks on the filter screen 400. To reduce the long-term accumulation of magnesia-chrome bricks, as the hollow cylinder 610 moves, magnetic metal impurities in the magnesia-chrome bricks are adsorbed onto the surface of the magnetic rod 621 through the hollow cylinder 610. At the same time, the hollow cylinder 610 and the magnetic rod 621 move back and forth laterally, and the support 6243 moves accordingly, driving the horizontal plate 6244 to move. At this time, through the cooperation between the rotating shaft 6245 and the bending frame 700, the support 6243 can pull the hollow frame 6242 to move laterally. At this time, the scraper 6241 moves back and forth laterally on the surface of the magnetic rod 621, which can continuously push out the magnetic metal impurities adsorbed on the surface of the magnetic rod 621, so that the magnetic metal impurities can fall to the outside through the hollow cylinder 610, thereby improving the demagnetization effect of the magnesia-chrome bricks.

[0023] During the crushing and impurity removal process, through the cooperation of the light rod 551 and the second gear assembly 552, and the setting of the rotating part 555, the transmission group 554 and the cam 553, the cam 553 can rotate and intermittently push the pulling plate 520, so that the filter screen 400 can continuously switch between tension and relaxation. Accordingly, the vibration generated when the filter screen 400 is tensioned can be used to clean the fragments stuck in the magnesia-chrome brick inside, reduce clogging, and ensure screening efficiency. Finally, the processed magnesia-chrome brick fragments can be hydrated to remove harmful impurities.

[0024] It should be noted that, in this document, relational terms such as "first" and "second" are used merely to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such a process, method, article, or apparatus. Without further limitations, an element defined by the phrase "comprising one..." does not exclude the presence of other identical elements in the process, method, article, or apparatus that includes said element.

[0025] 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 process for removing impurities and upgrading recycled magnesia-chrome brick materials, characterized in that, Includes the following steps: S1: Sort and select the post-magnesium chrome bricks; S2: Remove large impurities from the surface of the magnesium chrome brick; S3: Crush the post-magnesium chrome bricks to the required particle size; S4: Removes magnetic metal impurities from materials to improve the purity of recycled materials; S5: Screen and classify recycled materials according to particle size; S6: Hydration treatment eliminates free CaO in the magnesia-chrome bricks and softens and removes hydrated substances.

2. A device for removing impurities and upgrading recycled magnesia-chrome bricks for implementing the process described in claim 1, comprising a crushing unit (100) for crushing the magnesia-chrome bricks, the crushing unit (100) comprising a main frame (110), a drive shaft (120) rotatably passing through the main frame (110), and a breaker hammer (130) fixed on the surface of the drive shaft (120), wherein a multi-groove pulley is sleeved on the surface of the drive shaft (120), and the two multi-groove pulleys are connected by a first belt drive, characterized in that, Also includes: The base (200) is fixed to the bottom of the main frame (110); A filter screen (400) extends through the surface of a base (200). One end of the filter screen (400) is fixed to the surface of the base (200). Support rollers (300) are fixed on both sides of the inner wall of the base (200). The support rollers (300) are located below the filter screen (400). A force-applying assembly (500) is installed on a base (200). The force-applying assembly (500) includes a guide part (510) installed on the base (200), a pull plate (520) fixed to one end of the filter screen (400), and a storage box (530) fixed to the surface of the base (200). An extension frame (540) is provided on the surface of the storage box (530). A squeezing part (550) is provided inside the storage box (530) and the extension frame (540). The force-applying assembly (500) is connected to the filter screen (400) and is used to intermittently change the tension of the filter screen (400) to make it vibrate. The pusher assembly (600) is mounted on the base (200). The pusher assembly (600) includes a connecting part (620) and a hollow cylinder (610) movably mounted inside the base (200). There are two hollow cylinders (610), which are respectively mounted on the upper and lower sides of the filter screen (400). The connecting part (620) includes a magnetic rod (621) that rotates through the hollow cylinder (610) and a moving component (622) mounted on one end of the magnetic rod (621). A cleaning component (624) is mounted inside the hollow cylinder (610).

3. The equipment for removing impurities and upgrading recycled magnesia-chrome bricks according to claim 2, characterized in that, The moving component (622) includes: The vertical plate (6221) is slidably connected to the surface of the base (200); A two-way lead screw (6222) with threads penetrating the vertical plate (6221); A reinforcing rod (6223) is fixed to one end of a two-way lead screw (6222); The housing (6226) is fixed to the surface of the base (200); The protruding rod (6224) rotates through the surface of the housing (6226); The first gear assembly (6225) is disposed between the protruding rod (6224) and the reinforcing rod (6223); A double-groove pulley is fixed to one end of a protruding rod (6224), and a second belt is connected to the surface of the double-groove pulley and the multi-groove pulley for transmission.

4. The equipment for removing impurities and upgrading recycled magnesia-chrome bricks according to claim 3, characterized in that: A slide plate (623) is fixed to the surface of the vertical plate (6221). The magnetic rod (621) rotates through the slide plate (623). A groove is provided on one side of the base (200). The surface of the slide plate (623) is slidably connected to the inner wall of the groove. A accordion cover is fixed to both sides of the slide plate (623). The end of the accordion cover away from the slide plate (623) is fixed to the inside of the groove.

5. The equipment for removing impurities and upgrading recycled magnesia-chrome bricks according to claim 4, characterized in that, A bending frame (700) is fixed to one side of the surface of the base (200) and a through groove is provided. The surface of the hollow cylinder (610) is in contact with the inner wall of the through groove. The cleaning assembly (624) includes: The scraper (6241) is slidably sleeved on the surface of the magnetic rod (621); A hollow frame (6242) is fixed to the surface of the scraper (6241); A bracket (6243) is fixed to the surface of the hollow frame (6242), and a protective shell (800) is fixed to the surface of the bracket (6243). The protective shell (800) is slidably sleeved on the surface of the bending frame (700). A horizontal plate (6244) is fixed to one side of a bracket (6243); A pivot (6245) rotates through the top of a horizontal plate (6244), and the surface of the pivot (6245) contacts the inner wall of the bending frame (700).

6. The equipment for removing impurities and upgrading recycled magnesia-chrome bricks according to claim 5, characterized in that: The hollow cylinder (610) is rotatably fitted with a kit (630), the surface of the kit (630) is slidably connected to the inner wall of the through groove, and partitions (640) are fixed on both sides of the kit (630). The surface of the base (200) is provided with a cavity, and the surface of the partition (640) is slidably connected to the inner wall of the cavity.

7. The equipment for removing impurities and upgrading recycled magnesia-chrome bricks according to claim 2, characterized in that, The guide portion (510) includes: The guide tube is fixed to the surface of the base (200); An extension rod slides through one end of the guide tube away from the base (200), and the other end of the extension rod is fixed to the pull plate (520) outside the guide tube; A spring is installed on the inner wall of the guide tube, with its two ends abutting against the inner wall of the guide tube and one end of the extension rod, respectively.

8. The equipment for removing impurities and upgrading recycled magnesia-chrome bricks according to claim 3, characterized in that, The extrusion section (550) includes: The bare rod (551) rotates through the storage box (530); The cam (553) rotates through the top of the extension frame (540), and the surface of the cam (553) contacts the surface of the pull plate (520); Rotating component (555) rotates through the top of the storage box (530); The second gear assembly (552) is disposed between the rotating part (555) and the guide rod (551); The transmission assembly (554) is disposed between the rotating component (555) and the cam (553).

9. The equipment for removing impurities and upgrading recycled magnesia-chrome bricks according to claim 8, characterized in that: The first gear assembly (6225) includes a first gear ring and a second gear fixed on the surface of the reinforcing rod (6223), the first gear meshing with the second gear. The second gear assembly (552) includes a first gear ring and a second gear ring fixed on the light rod (551) and the rotating member (555) respectively, the first gear ring and the second gear ring meshing with each other.

10. The equipment for removing impurities and upgrading recycled magnesia-chrome bricks according to claim 8, characterized in that: The transmission assembly (554) includes synchronous pulleys fixed on the rotating part (555) and the cam (553) respectively, and a synchronous belt is connected between the two synchronous pulleys.

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