A magnetic separation device for separating particulate impurities in silicon carbide micropowder

Abstract

The invention discloses a magnetic separation device for separating particulate impurities in silicon carbide micropowder, belonging to the technical field of silicon carbide magnetic separation processing. In order to solve the problems that agglomeration of silicon carbide will affect the magnetic separation effect and magnetic impurities will often entrain part of non-magnetic silicon carbide micropowder, resulting in incomplete separation, the invention provides a bracket, a screening box is fixedly connected to the bracket, a driving motor is fixedly connected to the side wall of the screening box, a crushing box is fixedly connected to the top of the screening box, a feeding pipe is fixedly connected to the top of the crushing box, a tailings outlet is provided at the bottom of the screening box, and a receiving block is fixedly connected in the screening box. The magnetic separation device for separating particulate impurities in silicon carbide micropowder can automatically and intermittently transport silicon micropowder into the device body for screening, and can scatter agglomerated silicon carbide micropowder before screening to prevent agglomeration of silicon carbide micropowder, thereby improving production efficiency and ensuring the continuity of operation, and can perform secondary magnetic separation and screening to improve the purity of the product.

Description

Technical Field

[0001] The invention relates to the technical field of silicon carbide magnetic separation processing, in particular to a magnetic separation device for separating particle impurities in silicon carbide micropowder. Background Art

[0002] Silicon carbide micropowder is a micropowder material composed of silicon carbide particles. It has excellent properties such as high hardness, high temperature resistance, oxidation resistance, and corrosion resistance. It is widely used in ceramics, glass, electronics, aerospace and other fields. In the production and processing of silicon carbide micropowder, in order to ensure the purity and quality of the product, it is usually necessary to separate the silicon carbide micropowder from particle impurities. The existing separation is mainly achieved through magnetic separation devices, which effectively separate magnetic impurities from silicon carbide micropowder under the action of the magnetic field, thereby improving the purity of the product. However, the existing magnetic separation devices still have certain deficiencies when used.

[0003] For example, a silicon carbide multi-stage magnetic separation device with publication number CN221016586U is provided with at least two magnetic separation mechanisms in the magnetic separation box, which can sequentially perform magnetic separation on the input silicon carbide, so as to realize the multi-stage magnetic separation operation of silicon carbide, and the magnetic separation effect is good. However, the above-mentioned device directly puts the silicon carbide powder into the magnetic separation device at one time. Since silicon carbide is prone to condensation and agglomeration, especially in humid air, if the silicon carbide powder agglomerates, the agglomerated silicon carbide powder is difficult to fully disperse during the magnetic separation process, resulting in the inability to effectively adsorb and separate the magnetic impurities. At the same time, during the magnetic separation process, the magnetic impurities often also entrain some non-magnetic silicon carbide micropowders, so that the magnetic materials and non-magnetic materials that should be clearly separated become intertwined, resulting in incomplete separation, causing waste of raw materials, and increasing the difficulty and cost of subsequent processing.

[0004] Therefore, we proposed a magnetic separation device for separating particulate impurities in silicon carbide micropowder in order to solve the above-mentioned problems. Summary of the invention

[0005] The purpose of the present invention is to provide a magnetic separation device for separating particulate impurities in silicon carbide micropowder, so as to solve the problem proposed by the above-mentioned background technology that silicon carbide powder is directly put into the magnetic separation device at one time in the current market. Since silicon carbide is prone to condensation and agglomeration, especially in humid air, if silicon carbide powder is agglomerated, the agglomerated silicon carbide powder is difficult to fully disperse during the magnetic separation process, resulting in the inability to effectively adsorb and separate the magnetic impurities. At the same time, during the magnetic separation process, the magnetic impurities often also entrain some non-magnetic silicon carbide micropowder, making the magnetic material and non-magnetic material that should be clearly separated become intertwined, resulting in incomplete separation, causing waste of raw materials, and increasing the difficulty and cost of subsequent processing.

[0006] To achieve the above object, the present invention provides the following technical solution: a magnetic separation device for separating particulate impurities in silicon carbide micropowder, comprising a bracket, a screening box is fixedly connected to the bracket, a driving motor is fixedly connected to the side wall of the screening box, a crushing box is fixedly connected to the top of the screening box, a feeding pipe is fixedly connected to the top of the crushing box, and a tailing outlet is opened at the bottom of the screening box;

[0007] Also includes:

[0008] A receiving block is fixedly connected in the screening box, and a material receiving trough is provided in the receiving block, and a material leveling box is slidably connected to the bottom end of the receiving block, a first conveying roller is rotatably installed in the screening box below the material leveling box, and a first magnetic separation roller is rotatably installed in the screening box on the side of the first conveying roller, and a second conveying roller is rotatably installed in the screening box on the side of the first conveying roller away from the first magnetic separation roller, and a conveying belt is sleeved on the outer sides of the first conveying roller, and a fine separation cavity is provided in the screening box below the conveyor belt, an axial end of the second conveying roller penetrates through the screening box and extends out of the screening box and is fixedly connected to the output end of the driving motor, and a belt is sleeved on the outer side of the extended end of the second conveying roller, and a shaft rod is provided in the belt, one end of the shaft rod penetrates and extends into the fine separation cavity, and the extended end of the shaft rod is fixedly connected with the second magnetic separation roller, a group of slots are provided in the side wall of the screening box, and intermittent feeding mechanisms are provided in the two slots, and two axial ends of the first conveying roller respectively penetrate and extend into the slots and are fixedly connected to the intermittent feeding mechanism;

[0009] A first crushing rod is fixedly connected to the inner wall of the crushing box, and a driving shaft is rotatably connected to the bottom end of the crushing box. A second crushing rod is fixedly connected to the side wall of the driving shaft, and the top end of the driving shaft extends through the crushing box, and a driving gear is sleeved on the outer side of the extended end of the driving shaft.

[0010] Preferably, the material receiving trough corresponds to the crushing box, and a material discharge hole connecting the material receiving trough and the crushing box is opened at the top of the screening box, the material leveling box corresponds to the conveyor belt, and the first magnetic separation roller and the second conveying roller in the conveyor belt are symmetrically arranged at both ends of the conveyor belt about the first conveying roller, the second conveying roller is rotatably connected to the inner wall of the screening box, the first magnetic separation roller is arranged at one end close to the tail material outlet, the interior of the first magnetic separation roller is composed of multiple magnets, and the two axial ends of the first magnetic separation roller are fixedly connected to the inner wall of the screening box, the outer side of the magnet is provided with a roller body, and the roller body is rotatably connected to the magnet, and the outer surface of the roller body is in contact with the conveyor belt.

[0011] Preferably, the shaft rod and the second conveyor roller are symmetrically arranged at both ends of the belt, and the second magnetic separation roller on the shaft rod is rotatably connected to the inner wall of the screening box, and the second magnetic separation roller is located below the conveyor belt, a fine material outlet is provided at the bottom end of the screening box below the second magnetic separation roller, and a debris discharge outlet aligned with the second magnetic separation roller is provided on the screening box on the side of the fine material outlet.

[0012] Preferably, the intermittent feeding mechanism includes a uniform feeding component, a connecting shaft, a half gear, a fixed block, a movable part, a tooth block, a support rod, a cross plate, a sealing plate and a rack, the uniform feeding component is rotatably arranged in the slot, and one of the side walls of the uniform feeding component is rotatably connected with a connecting shaft, the other end of the connecting shaft extends through the screening box and is fixedly connected with the half gear, and a movable part is sleeved on the outer side of the half gear, the movable part is fixedly connected with a tooth block, and the bottom end of the movable part is slidably connected with a fixed block, and the top end of the movable part is fixedly connected with a support rod, the top end of the support rod is fixedly connected with a cross plate, and the side wall of the cross plate is fixedly connected with the sealing plate, and the cross plate on the side of the sealing plate is fixedly connected with a rack.

[0013] Preferably, the moving part is arranged in a rectangular frame structure, and two groups of tooth blocks are symmetrically arranged in the moving part, and both groups of tooth blocks are meshed with the half gears, the fixed block is fixedly connected to the side wall of the screening box, and the rack is meshed with the driving gear.

[0014] Preferably, the blocking plate corresponds to the discharge pipe, and the side wall of the discharge pipe is provided with a slide groove that matches the blocking plate. One end of the blocking plate slides into the interior of the discharge pipe through the slide groove, and a scraper that fits the upper surface of the blocking plate is fixedly connected to the inner wall of the discharge pipe above the slide groove.

[0015] Preferably, the intermittent unloading mechanism also includes a first airbag, a cleaning plate, a second airbag, a rotating rod and a baffle, the second airbag is fixedly arranged in the screening box, and one end of the second airbag is in contact with the baffle, and the baffle is fixedly connected to the rotating rod, the end of the rotating rod away from the baffle penetrates into the fine separation cavity, and the rotating rod is rotatably connected to the screening box, and the cleaning plate is nested and connected to the outer side of the extended end of the rotating rod, the cleaning plate is inclined, and the top of the cleaning plate is intermittently in contact with the surface of the conveyor belt, the first airbag is fixedly arranged in the fixed block, and the first airbag is connected to the second airbag through a pipe.

[0016] Preferably, the uniform feeding assembly includes a disc, a raised block, a contact plate and a ball bearing, the disc is arranged in a slot, and one end of the disc is fixedly connected to the axial end of the first conveying roller, the raised block is fixedly arranged on the side walls of opposite sides of the two discs, and an inclined surface is provided on the raised block, and the raised blocks on the two discs are staggered with each other.

[0017] Preferably, the uniform material discharge component also includes a contact plate and a ball, the contact plate is fixedly connected to the side wall of the material leveling box, and the contact plate and the ball are symmetrically arranged about the material leveling box, and the two ends of the contact plates that are away from each other respectively extend through the corresponding grooves, the two balls correspond to the contact plates one by one, and the balls are rotatably arranged on the contact plates, and the balls are located in the grooves, and the end of the balls away from the contact plates is in contact with the protruding block.

[0018] Preferably, a plurality of the first breaking rods and the second breaking rods are arranged in an array, and a plurality of the first breaking rods and the second breaking rods are arranged in a circular array about the center point of the breaking box, and the first breaking rods and the second breaking rods are arranged alternately.

[0019] Compared with the prior art, the beneficial effects of the present invention are: the magnetic separation device for separating particulate impurities in silicon carbide micropowder can automatically and intermittently transport silicon micropowder to the device body for screening, and can scatter agglomerated silicon carbide micropowder before screening to prevent silicon carbide micropowder from agglomerating, thereby improving production efficiency and ensuring the continuity of operation, and can perform secondary magnetic separation and screening to improve the purity of the product. The specific contents are as follows:

[0020] 1. A half gear, a moving part and a tooth block are provided. The half gear rotates so that the half gear intermittently meshes with the tooth block, thereby driving the moving part to move back and forth. When the moving part moves, it drives the cross plate to move through the support rod, so that the cross plate pulls the blocking plate to slide along the slide groove, and the discharge pipe is opened intermittently, thereby realizing intermittent discharge. In addition, the scraper will slide along the surface of the blocking plate during the sliding process of the blocking plate, and scrape off the silicon carbide powder remaining on the surface of the blocking plate, thereby avoiding the accumulation or waste of materials that may be caused by continuous discharge, and improving efficiency.

[0021] 2. A first breaker bar and a second breaker bar are provided. When the cross plate moves, it drives the rack to move, so that the rack meshes with the driving gear. The driving gear drives the driving shaft to rotate, so that the driving shaft drives the second breaker bar to rotate. The second breaker bar passes through the gap between the first breaker bars, thereby scattering the agglomerated silicon carbide powder and improving the separation efficiency and accuracy of magnetic separation.

[0022] 3. A raised block, a contact plate and a ball bearing are provided. When the driving motor drives the second conveyor roller to rotate, the second conveyor roller will drive the first conveyor roller to rotate through the conveyor belt, so that the first conveyor roller drives the disc to rotate, and the disc drives the raised block to rotate, so that the ball bearing rolls along the inclined surface of the raised block, thereby pushing the material mixing box to move back and forth through the contact plate, so that the silicon carbide powder is evenly sprinkled on the surface of the conveyor belt, avoiding material accumulation and further improving the screening accuracy.

[0023] 4. A first airbag and a second airbag are provided. During the reciprocating movement of the moving part, the moving part squeezes the first airbag, causing the first airbag to deform, and the gas stored therein is transported to the second airbag through a pipeline, causing the second airbag to expand, thereby squeezing the baffle. The baffle drives the driving shaft to rotate, so that the driving shaft drives the cleaning plate to fit with the surface of the conveyor belt, cleans the conveyor belt, and scrapes off the silicon carbide micropowder particles attached to the surface of the conveyor belt. The scraped micropowder slides along the surface of the cleaning plate for secondary magnetic separation, further separating the magnetic impurities in the micropowder, thereby improving the recycling rate of resources. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] Figure 1 It is a schematic diagram of the main structure of the present invention;

[0025] Figure 2 It is a rear view structural schematic diagram of the present invention;

[0026] Figure 3 For the present invention Figure 2 The enlarged structural diagram at A in the middle;

[0027] Figure 4 It is a schematic diagram of the internal structure of the present invention;

[0028] Figure 5 For the present invention Figure 4 The enlarged structural diagram at B in the middle;

[0029] Figure 6 For the present invention Figure 4 The enlarged structural diagram at C in the middle;

[0030] Figure 7 This is a schematic diagram of the top-sectional structure of the crushing box of the present invention;

[0031] Figure 8 It is a schematic diagram of the side section structure of the present invention;

[0032] Fig. 9 This is a schematic diagram of the internal structure of the slot of the present invention;

[0033] Fig.10 It is a schematic diagram of the main cross-sectional structure of the feed tube of the present invention.

[0034] In the figure: 1, bracket; 2, screening box; 201, tailing outlet; 202, fine separation chamber; 203, slot; 204, fine material outlet; 3, driving motor; 4, crushing box; 5, feeding pipe; 501, chute; 502, scraper; 6, receiving block; 601, receiving trough; 7, material leveling box; 8, first conveying roller; 9, first magnetic separation roller; 10, second conveying roller; 11, conveyor belt; 12, intermittent feeding mechanism; 121, uniform feeding assembly; 1211, disc; 1212, raised block; 1213, contact plate; 1214, ball bearing; 122, connecting shaft; 123, half gear; 124, fixed block; 125, moving part; 126, gear block; 127, supporting rod; 128, cross plate; 129, blocking plate; 130, rack; 131, first air bag; 132, cleaning plate; 133, second air bag; 134, rotating rod; 135, baffle; 13, first breaker rod; 14, driving shaft; 15, second breaker rod; 16, belt; 17, driving gear; 18, shaft; 19, second magnetic separation roller; 20, debris discharge port. DETAILED DESCRIPTION

[0035] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0036] Example 1: Please refer to Figure 1-Figure 10 As shown, the present invention provides a technical solution: a magnetic separation device for separating particulate impurities in silicon carbide micropowder, comprising a bracket 1, a screening box 2 is fixedly connected to the bracket 1, a driving motor 3 is fixedly connected to the side wall of the screening box 2, and a crushing box 4 is fixedly connected to the top of the screening box 2, a feed pipe 5 is fixedly connected to the top of the crushing box 4, and a tailing outlet 201 is opened at the bottom of the screening box 2.

[0037] The technical solution utilizes the setting of the screening box 2 and the crushing box 4. When in use, the device is first placed in a designated area, and then the silicon carbide micropowder that needs magnetic separation is transported to the discharge pipe 5, so that the silicon carbide micropowder enters the crushing box 4 through the discharge pipe 5 for crushing. After the crushing, the silicon carbide micropowder will fall into the screening box 2 for screening. Driven by the drive motor 3, the falling silicon carbide micropowder is magnetically separated, and the silicon carbide micropowder particles are discharged from the tailing outlet 201, while the magnetic impurities are adsorbed on the roller surface for secondary separation, and then the separated magnetic impurities can be discharged through the impurity discharge port 20.

[0038] Embodiment 2: The technical content disclosed in this embodiment is an improvement made on the basis of the above-mentioned embodiment 1. In the existing magnetic separation device, during the magnetic separation process, magnetic impurities often entrain part of the non-magnetic silicon carbide powder, so that the magnetic materials and non-magnetic materials that should be clearly separated become intertwined, resulting in incomplete separation, causing waste of raw materials, and increasing the difficulty and cost of subsequent processing. The technical solution is as follows Figure 2-Figure 6 and Figure 8-Figure 10As shown, a secondary magnetic separation component of a magnetic separation device is disclosed, wherein a receiving block 6 is fixedly connected to a screening box 2, and a material receiving trough 601 is provided in the receiving block 6, and a material leveling box 7 is slidably connected to the bottom end of the receiving block 6, a first conveying roller 8 is rotatably installed in the screening box 2 below the material leveling box 7, and a first magnetic separation roller 9 is rotatably installed in the screening box 2 on the side of the first conveying roller 8, and a second conveying roller 10 is rotatably installed in the screening box 2 on the side of the first conveying roller 8 away from the first magnetic separation roller 9, a conveyor belt 11 is sleeved on the outer sides of the first conveying roller 8, the first magnetic separation roller 9 and the second conveying roller 10, and a fine separation cavity 202 is provided in the screening box 2 below the conveyor belt 11, and the axial end of the second conveying roller 10 extends through the screening box 2 and the transmission of the driving motor 3. The outlet end is fixedly connected, and a belt 16 is sleeved on the outer side of the protruding end of the second conveyor roller 10, and a shaft 18 is arranged in the belt 16, one end of the shaft 18 penetrates and extends into the fine separation cavity 202, and the inserted end of the shaft 18 is fixedly connected with the second magnetic separation roller 19, a group of slots 203 are provided in the side wall of the screening box 2, and the two slots 203 are provided with an intermittent feeding mechanism 12, and the two axial ends of the first conveyor roller 8 respectively penetrate and extend into the slots 203 and are fixedly connected to the intermittent feeding mechanism 12, the receiving trough 601 corresponds to the crushing box 4, and the top of the screening box 2 is provided with a feeding hole connecting the receiving trough 601 and the crushing box 4, the material sizing box 7 corresponds to the conveyor belt 11, and the first magnetic separation roller 9 and the second conveyor roller 10 in the conveyor belt 11 are connected with each other with respect to the first A conveying roller 8 is symmetrically arranged at both ends of the conveyor belt 11, the second conveying roller 10 is rotatably connected to the inner wall of the screening box 2, the first magnetic separation roller 9 is arranged at one end close to the tailing outlet 201, the interior of the first magnetic separation roller 9 is composed of a plurality of magnets, and the two axial ends of the first magnetic separation roller 9 are fixedly connected to the inner wall of the screening box 2, the outer side of the magnet is sleeved with a roller body, and the roller body is rotatably connected to the magnet, and the outer surface of the roller body is in contact with the conveyor belt 11, the shaft 18 and the second conveying roller 10 are symmetrically arranged at both ends of the belt 16, and the second magnetic separation roller 19 on the shaft 18 is rotatably connected to the inner wall of the screening box 2, and the second magnetic separation roller 19 is located below the conveyor belt 11, and a fine material outlet 204 is opened at the bottom of the screening box 2 below the second magnetic separation roller 19, and the fine material outlet 204 The side screening box 2 is provided with a debris discharge port 20 aligned with the second magnetic separation roller 19, and the intermittent feeding mechanism 12 includes a uniform feeding component 121, a connecting shaft 122, a half gear 123, a fixed block 124, a moving part 125, a tooth block 126, a support rod 127, a cross plate 128, a blocking plate 129 and a rack 130. The uniform feeding component 121 is rotatably arranged in the slot 203, and one of the side walls of the uniform feeding component 121 is rotatably connected with the connecting shaft 122, and the other end of the connecting shaft 122 extends through the screening box 2 and is fixedly connected with the half gear 123, and a moving part 125 is sleeved on the outer side of the half gear 123, and a tooth block 126 is fixedly connected inside the moving part 125, and the bottom end of the moving part 125 is slidably connected with the fixed block 124.The top of the moving member 125 is fixedly connected to a support rod 127, the top of the support rod 127 is fixedly connected to a cross plate 128, and the side wall of the cross plate 128 is fixedly connected to a blocking plate 129, and the cross plate 128 on the side of the blocking plate 129 is fixedly connected to a rack 130, the moving member 125 is arranged in a rectangular frame structure, and the tooth blocks 126 in the moving member 125 are symmetrically arranged in two groups, and the two groups of tooth blocks 126 are meshed with the half gear 123, the fixed block 124 is fixedly connected to the side wall of the screening box 2, the rack 130 is meshed with the driving gear 17, the blocking plate 129 corresponds to the discharge pipe 5, and the side wall of the discharge pipe 5 is provided with a slide groove that matches the blocking plate 129 501, one end of the blocking plate 129 slides into the interior of the discharge pipe 5 through the chute 501, and a scraper 502 is fixedly connected to the inner wall of the discharge pipe 5 above the chute 501 and is fitted with the upper surface of the blocking plate 129. The intermittent discharge mechanism 12 also includes a first air bag 131, a cleaning plate 132, a second air bag 133, a rotating rod 134 and a baffle 135. The second air bag 133 is fixedly arranged in the screening box 2, and one end of the second air bag 133 is fitted with the baffle 135, and the baffle 135 is fixedly connected with the rotating rod 134, and the end of the rotating rod 134 away from the baffle 135 penetrates and extends into the fine separation chamber 202, and the rotating rod 134 is rotatably connected to the screening box 2, and the rotating rod 134 is rotatably connected to the screening box 2. The outer side of the extended end of the moving rod 134 is nested and connected with a cleaning plate 132, the cleaning plate 132 is inclined, and the top of the cleaning plate 132 is intermittently fitted with the surface of the conveyor belt 11, the first air bag 131 is fixedly arranged in the fixed block 124, and the first air bag 131 is connected with the second air bag 133 through a pipeline, the uniform feeding component 121 includes a disc 1211, a protruding block 1212, a contact plate 1213 and a ball 1214, the disc 1211 is arranged in the slot 203, and one end of the disc 1211 is fixedly connected to the shaft end of the first conveyor roller 8, the protruding block 1212 is fixedly arranged on the side wall of the opposite side of the two discs 1211, and the protruding block 1212 is provided with The uniform feeding assembly 121 further comprises a contact plate 1213 and a ball 1214, the contact plate 1213 is fixedly connected to the side wall of the material screed box 7, and the contact plate 1213 and the ball 1214 are symmetrically arranged about the material screed box 7, and the ends of the two contact plates 1213 that are separated from each other respectively penetrate and extend into the corresponding slots 203, the two balls 1214 correspond to the contact plates 1213 one by one, and the balls 1214 are rotatably arranged on the contact plates 1213, and the balls 1214 are located in the slots 203, and the ends of the balls 1214 that are away from the contact plates 1213 are fitted with the raised blocks 1212.

[0039] In this technical solution, Figure 2As shown, the technical solution utilizes the setting of the half gear 123 and the moving part 125, so that the half gear 123 will intermittently mesh with the two sets of gear blocks 126 when rotating, thereby driving the moving part 125 to move back and forth, and the reciprocating moving part 125 will drive the sealing plate 129 to move through the transmission of the support rod 127 and the cross plate 128, and intermittently open the discharge pipe 5, which is conducive to the precise regulation and stable supply of the silicon carbide micropowder flow rate, ensuring that the silicon carbide micropowder enters the subsequent processing link with a uniform and stable flow rate, preventing blockage and accumulation caused by excessive materials, and improving the continuity and stability of the production process.

[0040] Its use is as Figure 3-Figure 6 and Figure 8-Figure 10 According to the technical solution shown, first, when in use, silicon carbide powder will be transported to the discharge pipe 5, and the drive motor 3 will be turned on at this time. The drive motor 3 will drive the second conveyor roller 10 to rotate, so that the second conveyor roller 10 will drive the first conveyor roller 8, the first magnetic separation roller 9 and the conveyor belt 11 to rotate synchronously. When the first conveyor roller 8 rotates, it will drive the disc 1211 to rotate, and the disc 1211 will drive the connecting shaft 122 to rotate. The connecting shaft 122 will drive the half gear 123 to rotate in the moving part 125. Since the tooth blocks 126 of the moving part 125 are symmetrically arranged in two groups up and down, the half gear 123 will intermittently align with the tooth blocks 126, thereby driving the moving part 125 to reciprocate left and right. When the moving part 125 moves, it will drive the support rod 127 to move, so that the support rod 127 drives the cross plate 128 to move, and the cross plate 128 will Pull the blocking plate 129 to move synchronously. When the blocking plate 129 moves, the blocking plate 129 will slide along the chute 501 to open the opening of the discharge pipe 5. At this time, the silicon carbide powder in the discharge pipe 5 will enter the crushing box 4, and the scraper 502 will slide along the surface of the blocking plate 129 when the blocking plate 129 moves, and the silicon carbide powder remaining on the upper surface of the blocking plate 129 will be scraped off, and then fall into the crushing box 4, and then enter the receiving trough 601 from the crushing box 4, and fall from the receiving trough 601 to the material mixing box 7, and finally fall from the material mixing box 7 to the conveyor belt 11. With the movement of the conveyor belt 11, when the silicon carbide powder moves to the first magnetic separation roller 9, the magnetic impurities will be adsorbed on the conveyor belt 11, and the silicon carbide powder will be discharged through the tailing outlet 201 to achieve the first impurity removal;

[0041] When the disc 1211 rotates, it will drive the protruding block 1212 to rotate synchronously. At this time, the ball 1214 will roll along the surface of the protruding block 1212, thereby pushing the contact plate 1213 to move. Since the protruding blocks 1212 on the two discs 1211 are staggered, the ball 1214 on the two contact plates 1213 will intermittently fit with the protruding block 1212, so that the contact plate 1213 pushes the material mixing box 7 to move back and forth left and right. During the movement, the material mixing box 7 will evenly spread the silicon carbide powder in it on the conveyor belt 11;

[0042] After the conveyor belt 11 moves away from the first magnetic separation roller 9, the magnetic impurities attached to the conveyor belt 11 will fall into the fine separation chamber 202. Since the second conveyor roller 10 is connected to the shaft 18 through the belt 16, the second conveyor roller 10 will drive the shaft 18 to rotate synchronously when rotating, and the shaft 18 will drive the second magnetic separation roller 19 to rotate, so as to perform secondary magnetic separation on the separated magnetic impurities. The silicon carbide powder entrained by the magnetic impurities will be discharged through the fine separation chamber 202, and the magnetic impurities will be discharged through the impurity discharge port 20. At the same time, the moving part 125 will intermittently squeeze the first airbag 131 when sliding along the surface of the fixed block 124. The squeezed first airbag 131 will be deformed, so that the gas stored therein is transported to the second airbag 133 through the pipeline, so that the second airbag 133 expands. The expanded second airbag 133 will push the baffle 135, so that the baffle 135 drives the rotating rod 134 to rotate. When the rotating rod 134 rotates, it will drive the cleaning plate 132 to rotate, so that the cleaning plate 132 is intermittently fitted with the surface of the conveyor belt 11, so as to clean the conveyor belt 11 and prevent silicon carbide powder or impurities from adhering to the surface of the conveyor belt 11. The scraped silicon carbide powder or impurities will roll along the surface of the cleaning plate 132 to the second magnetic separation roller 19 for secondary magnetic separation.

[0043] Embodiment 3: The technical content disclosed in this embodiment is a further improvement based on the above-mentioned embodiments 1 and 2. When silicon carbide powder is directly put into the magnetic separation device at one time, because silicon carbide is prone to condensation and agglomeration, especially in humid air, if silicon carbide powder agglomerates, the agglomerated silicon carbide powder is difficult to fully disperse during the magnetic separation process, resulting in the inability to effectively adsorb and separate magnetic impurities. In order to further solve this technical problem, the technical solution of this invention is as follows: Figure 1 and Figure 7As shown, a crushing assembly of a magnetic separation device is disclosed, wherein a first crushing rod 13 is fixedly connected to the inner wall of a crushing box 4, and a driving shaft 14 is rotatably connected to the inner bottom end of the crushing box 4, a second crushing rod 15 is fixedly connected to the side wall of the driving shaft 14, and the top end of the driving shaft 14 passes through and extends out of the crushing box 4, and a driving gear 17 is sleeved on the outer side of the extended end of the driving shaft 14, a plurality of first crushing rods 13 and second crushing rods 15 are arranged in an array, and a plurality of first crushing rods 13 and second crushing rods 15 are arranged in a circular array about the center point of the crushing box 4, and the first crushing rods 13 and the second crushing rods 15 are staggered with each other.

[0044] In this technical solution, Figure 1 As shown, by using the arrangement of the first breaker rod 13 and the second breaker rod 15, the rack 130 will drive the driving shaft 14 to rotate when meshing with the driving gear 17, thereby driving the second breaker rod 15 through the gap between the two adjacent first breaker rods 13 through the driving shaft 14, breaking up the agglomerated silicon carbide powder, ensuring the uniformity and dispersion of the powder particles, thereby improving the accuracy and efficiency of magnetic separation.

[0045] Its use is as Figure 7 According to the technical solution shown, first, when the horizontal plate 128 moves, it will drive the rack 130 to move synchronously, so that the rack 130 is meshed with the driving gear 17, thereby driving the driving gear 17 to rotate, and the driving gear 17 will drive the driving shaft 14 to rotate, and the driving shaft 14 will drive the second crushing rod 15 to rotate synchronously, so that the second crushing rod 15 passes through the gap between the first crushing rods 13, thereby crushing the agglomerated silicon carbide powder.

[0046] The contents not described in detail in this specification belong to the prior art known to professional and technical personnel in this field.

[0047] Although the present invention has been described in detail with reference to the aforementioned embodiments, it is still possible for those skilled in the art to modify the technical solutions described in the aforementioned embodiments, or to make equivalent substitutions for some of the technical features therein. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. A magnetic separation device for separating particulate impurities in silicon carbide micropowder, comprising a support (1), a screening box (2) fixedly connected to the support (1), a driving motor (3) fixedly connected to the side wall of the screening box (2), a crushing box (4) fixedly connected to the top of the screening box (2), a feeding pipe (5) fixedly connected to the top of the crushing box (4), and a tailing outlet (201) opened at the bottom of the screening box (2); It is characterized in that Also includes: A receiving block (6) is fixedly connected to the screening box (2), and a material receiving groove (601) is provided in the receiving block (6), and a material leveling box (7) is slidably connected to the bottom end of the receiving block (6), a first conveying roller (8) is rotatably installed in the screening box (2) below the material leveling box (7), a first magnetic separation roller (9) is rotatably installed in the screening box (2) on the side of the first conveying roller (8), and a second conveying roller (10) is rotatably installed in the screening box (2) on the side of the first conveying roller (8) away from the first magnetic separation roller (9), the outer sides of the first conveying roller (8), the first magnetic separation roller (9) and the second conveying roller (10) are all sleeved with a conveyor belt (11), and a fine separation roller (11) is provided in the screening box (2) below the conveyor belt (11). The second conveying roller (10) is provided with a belt (16) on the outer side of the extended end of the second conveying roller (10), and a shaft (18) is arranged in the belt (16), one end of the shaft (18) extends into the fine separation chamber (202), and the extended end of the shaft (18) is fixedly connected to the second magnetic separation roller (19), a group of slots (203) are provided in the side wall of the screening box (2), and two of the slots (203) are provided with an intermittent feeding mechanism (12), and two shaft ends of the first conveying roller (8) respectively extend into the slots (203) and are fixedly connected to the intermittent feeding mechanism (12); A first crushing rod (13) is fixedly connected to the inner wall of the crushing box (4), and a driving shaft (14) is rotatably connected to the inner bottom end of the crushing box (4). A second crushing rod (15) is fixedly connected to the side wall of the driving shaft (14), and the top end of the driving shaft (14) extends through the crushing box (4), and a driving gear (17) is sleeved on the outer side of the extended end of the driving shaft (14).

2. The magnetic separation device for separating particulate impurities in silicon carbide micropowder according to claim 1, characterized in that: The receiving trough (601) corresponds to the crushing box (4), and a feeding hole connecting the receiving trough (601) and the crushing box (4) is provided at the top of the screening box (2). The material leveling box (7) corresponds to the conveyor belt (11), and a first magnetic separation roller (9) and a second conveying roller (10) in the conveyor belt (11) are symmetrically arranged at two ends of the conveyor belt (11) with respect to the first conveying roller (8). The second conveying roller (10) is rotatably connected to the inner wall of the screening box (2). The first magnetic separation roller (9) is arranged at one end close to the tailing material outlet (201). The interior of the first magnetic separation roller (9) is composed of a plurality of magnets, and the two axial ends of the first magnetic separation roller (9) are fixedly connected to the inner wall of the screening box (2). A roller body is sleeved on the outer side of the magnet, and the roller body is rotatably connected to the magnet, and the outer surface of the roller body is in contact with the conveyor belt (11).

3. The magnetic separation device for separating particulate impurities in silicon carbide micropowder according to claim 1, characterized in that: The shaft (18) and the second conveyor roller (10) are symmetrically arranged at both ends of the belt (16), and the second magnetic separation roller (19) on the shaft (18) is rotatably connected to the inner wall of the screening box (2), and the second magnetic separation roller (19) is located below the conveyor belt (11), and a fine material outlet (204) is provided at the bottom of the screening box (2) below the second magnetic separation roller (19), and a debris discharge port (20) aligned with the second magnetic separation roller (19) is provided on the screening box (2) on the side of the fine material outlet (204).

4. The magnetic separation device for separating particulate impurities in silicon carbide micropowder according to claim 1, characterized in that: The intermittent feeding mechanism (12) comprises a uniform feeding component (121), a connecting shaft (122), a half gear (123), a fixed block (124), a moving member (125), a gear block (126), a support rod (127), a transverse plate (128), a blocking plate (129) and a rack (130), wherein the uniform feeding component (121) is rotatably arranged in the slot (203), and a side wall of one of the uniform feeding components (121) is rotatably connected to the connecting shaft (122), and the other end of the connecting shaft (122) penetrates and extends out of the screening box (2) and the half gear. The half gear (123) is fixedly connected, and a moving member (125) is sleeved on the outer side of the half gear (123), a tooth block (126) is fixedly connected inside the moving member (125), and a fixed block (124) is slidably connected to the bottom end of the moving member (125), and a support rod (127) is fixedly connected to the top end of the moving member (125), a cross plate (128) is fixedly connected to the top end of the support rod (127), and a blocking plate (129) is fixedly connected to the side wall of the cross plate (128), and a rack (130) is fixedly connected to the cross plate (128) on the side of the blocking plate (129).

5. The magnetic separation device for separating particulate impurities in silicon carbide micropowder according to claim 4, characterized in that: The moving member (125) is arranged in a rectangular frame structure, and two groups of tooth blocks (126) are symmetrically arranged in the moving member (125), and both groups of tooth blocks (126) are meshed with the half gear (123). The fixed block (124) is fixedly connected to the side wall of the screening box (2), and the rack (130) is meshed with the driving gear (17).

6. The magnetic separation device for separating particulate impurities in silicon carbide micropowder according to claim 4, characterized in that: The blocking plate (129) corresponds to the feed tube (5), and a chute (501) matching the blocking plate (129) is provided on the side wall of the feed tube (5); one end of the blocking plate (129) slides through the chute (501) and extends into the interior of the feed tube (5); and a scraper (502) matching the upper surface of the blocking plate (129) is fixedly connected to the inner wall of the feed tube (5) above the chute (501).

7. The magnetic separation device for separating particulate impurities in silicon carbide micropowder according to claim 4, characterized in that: The intermittent unloading mechanism (12) further comprises a first airbag (131), a cleaning plate (132), a second airbag (133), a rotating rod (134) and a baffle (135), wherein the second airbag (133) is fixedly arranged in the screening box (2), and one end of the second airbag (133) is in contact with the baffle (135), and the baffle (135) is fixedly connected to the rotating rod (134), and one end of the rotating rod (134) away from the baffle (135) extends through the baffle. The rotating rod (134) is rotatably connected to the screening box (2), and a cleaning plate (132) is nested and connected to the outer side of the extending end of the rotating rod (134), the cleaning plate (132) is arranged obliquely, and the top end of the cleaning plate (132) is intermittently in contact with the surface of the conveyor belt (11), the first airbag (131) is fixedly arranged in the fixed block (124), and the first airbag (131) is connected to the second airbag (133) through a pipeline.

8. The magnetic separation device for separating particulate impurities in silicon carbide micropowder according to claim 4, characterized in that: The uniform material discharge component (121) comprises a disc (1211), a protruding block (1212), a contact plate (1213) and a ball (1214); the disc (1211) is arranged in the slot (203), and one end of the disc (1211) is fixedly connected to the shaft end of the first conveying roller (8); the protruding block (1212) is fixedly arranged on the side walls of the two discs (1211) on opposite sides, and an inclined surface is provided on the protruding block (1212); and the protruding blocks (1212) on the two discs (1211) are arranged in an interlaced manner.

9. The magnetic separation device for separating particulate impurities in silicon carbide micropowder according to claim 8, characterized in that: The uniform material discharge assembly (121) further comprises a contact plate (1213) and a ball bearing (1214); the contact plate (1213) is fixedly connected to the side wall of the material leveling box (7); the contact plate (1213) and the ball bearing (1214) are symmetrically arranged with respect to the material leveling box (7); and the ends of the two contact plates (1213) which are away from each other respectively penetrate and extend into the corresponding slots (203); the two ball bearings (1214) correspond to the contact plates (1213) one by one; the ball bearings (1214) are rotatably arranged on the contact plate (1213); the ball bearings (1214) are located in the slots (203); and the ends of the ball bearings (1214) which are away from the contact plate (1213) are in contact with the protruding block (1212).

10. The magnetic separation device for separating particulate impurities in silicon carbide micropowder according to claim 1, characterized in that: A plurality of the first crushing rods (13) and the second crushing rods (15) are arranged in an array, and a plurality of the first crushing rods (13) and the second crushing rods (15) are arranged in a circular array about a center point of the crushing box (4), and the first crushing rods (13) and the second crushing rods (15) are arranged in an interlaced manner.

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