Sieving and granulating equipment for silicon nitride

Abstract

The invention relates to the technical field of silicon nitride granulation, in particular to silicon nitride sieving granulation equipment which comprises a supporting assembly, a material spraying mechanism, a granulation mechanism and an air spraying assembly, wherein the material spraying mechanism and the granulation mechanism are arranged on the supporting assembly, and the air spraying assembly is arranged outside the granulation mechanism. The particle screening mechanism is arranged on the granulation mechanism; the multiple groups of partition material guide assemblies are arranged on the particle screening mechanism; and the supporting assembly is used for providing enough stable supporting force for the spraying mechanism and the granulating mechanism. Slurry is directly jetted upwards along the center of an inner cavity of the drying tower, a high-temperature airflow column which jets in an inclined mode is arranged under the slurry, at the moment, the slurry is transferred upwards under the rolling action of a material guiding piece and a guiding inner pad at the moment after being cured and formed, and therefore the height difference existing after particles are formed is avoided; therefore, the granulation integrity is improved.

Description

Technical Field

[0001] The invention relates to the technical field of silicon nitride granulation, in particular to silicon nitride screening and granulation equipment. Background Art

[0002] The efficiency of silicon nitride ceramic preparation is directly related to silicon nitride ceramic powder. Round silicon nitride particles will be heated more evenly, thereby improving the density and mechanical properties of silicon nitride ceramic products. Therefore, granulation of silicon nitride powder is crucial.

[0003] At present, the silicon nitride granulation process is mainly divided into dry roller granulation technology, cold isostatic pressing technology, spray granulation technology, etc. Among them, the existing equipment used in the spray granulation process has certain disadvantages. The existing spray granulation equipment needs to spray the mixed slurry upward from the bottom of the drying tower, and spray the high-temperature airflow downward from the top of the drying tower to achieve rapid granulation of the slurry. However, this method has a height difference under high pressure or centrifugal state, and the particles are prone to breakage after falling. At the same time, the round and rough particles will be mixed, so it is difficult to ensure the integrity and roundness of the particles after granulation.

[0004] In view of this, a silicon nitride screening and granulation equipment was designed. Summary of the invention

[0005] The present invention aims to solve one of the technical problems existing in the prior art or related technology.

[0006] To this end, the technical solution adopted in the present invention is: A silicon nitride screening and granulation device comprises a support assembly, a spraying mechanism and a granulation mechanism arranged on the support assembly, an air jet assembly arranged outside the granulation mechanism, a particle screening mechanism arranged on the granulation mechanism, and a multi-component zoned material guiding assembly arranged on the particle screening mechanism; the support assembly is used to provide a sufficiently stable supporting force for the spraying mechanism and the granulation mechanism; the spraying mechanism is used to spray the mixed slurry upward at high pressure and provide an effective cleaning platform after the operation; the granulation mechanism comprises a drying tower, the bottom end of the drying tower is provided with evenly distributed inclined holes, and the top of the drying tower is provided with a material guiding piece; the air jet assembly comprises a guide pipe arranged in the inclined hole and an anti-seepage pad installed on the top of the guide pipe; the particle screening mechanism comprises a top bin arranged on the top of the material guiding piece, the top of the top bin is provided with a drainage inner pad; the bottom of the drainage inner pad is provided with a spherical rolling groove; a plurality of groups of zoned material guiding assemblies are used to transfer round particles and rough particles in zones.

[0007] In a preferred example, the present invention can be further configured as follows: the inner wall of the top bin is provided with a plurality of evenly distributed discharge slots, and the inner side of the top bin is provided with an inclined screen; The cross section of the inclined screen is L-shaped, and the inclined surface of the inclined screen is provided with screen holes, and the aperture of the screen holes gradually decreases from the inner end to the outer end of the inclined screen; A plurality of evenly distributed positioning rods are provided at the bottom of the outer end of the inclined screen; A spring is arranged outside the positioning rod, and a plurality of springs are used to provide a reset force for the inclined screen to vibrate.

[0008] In a preferred example, the present invention can be further configured as follows: the partitioned material guiding assembly includes a discharge pipe arranged inside the discharge slot, and the inner cavity of the discharge pipe is provided with a pad; A coarse particle discharge cavity is provided on the top surface of the pad and the top of the inner cavity of the discharge pipe, and the coarse particle discharge cavity is used to transfer the coarse particles; The bottom surface of the pad and the bottom surface of the inner cavity of the discharge pipe are provided with round particle discharge cavities, and the round particle discharge cavities are used to transfer round particles.

[0009] In a preferred example, the present invention can be further configured as follows: the material spraying mechanism includes a transfer bin, and a cylindrical cavity is provided inside the transfer bin, and a sealing plug is provided in the notch at the top of the transfer bin; A liquid injection pipe is installed on one side of the transfer bin, and a grouting pipe is installed on the other side of the transfer bin; A nozzle is arranged at the top of the transfer bin, and the nozzle is in a conical structure, and uniformly distributed spray holes are opened inside the nozzle; The ports of the plurality of anti-seepage pad nets are parallel to the conical surface of the nozzle.

[0010] In a preferred example, the present invention can be further configured as follows: the spraying mechanism further includes a hydraulic component arranged inside the transfer bin, and a piston pad is installed at the top end of the hydraulic sub-rod in the hydraulic component; The piston pad is movably installed in the cylindrical cavity in the transfer bin.

[0011] In a preferred example, the present invention can be further configured as follows: the granulation mechanism further includes a ring gasket arranged at the bottom of the drying tower, and a fixing bolt is arranged in the transverse hole inside the ring gasket; A plurality of evenly distributed first assembly bolts are arranged in the drying tower and the material introducing member.

[0012] In a preferred example, the present invention can be further configured as follows: the granulation mechanism further includes a plurality of drainage baffles, and the outer eight-shaped structure formed by two adjacent drainage baffles is adapted to the port inside the discharge slot; A plurality of the guide baffles are fixedly mounted on the concave surface at the top of the material introducing member, and the concave surface at the top of the material introducing member is used to guide the high-pressure airflow and provide a path for rapid emptying of the round particles.

[0013] In a preferred example, the present invention can be further configured as follows: the jet assembly further includes an annular tube installed on the plurality of flow guide tubes and an air pipe installed on the annular tube; The air pipe is used for transferring high-temperature airflow.

[0014] In a preferred example, the present invention can be further configured as follows: the particle screening mechanism further includes a sealing cover arranged at the top of the top bin, and a plurality of groups of second assembly bolts arranged in the top bin and the sealing cover and evenly distributed; The sealing cover is used to provide sufficient compressive support for the drainage inner cushion.

[0015] In a preferred example, the present invention can be further configured as follows: the support assembly includes a plurality of legs, a support pole disposed in the legs, and two pads installed on the top and bottom of the support pole.

[0016] By adopting the above technical solution, the beneficial effects achieved by the present invention are: 1. The present invention sprays the slurry upward directly along the center of the inner cavity of the drying tower, and a high-temperature air flow column is arranged for inclined spraying directly below the slurry. At this time, the slurry will be transferred upward by the rolling effect of the guide piece and the guide inner pad immediately after solidification, thereby avoiding the height difference of the particles after forming, so as to improve the integrity of the granulation.

[0017] 2. The present invention arranges an inclined screen at the top of the material guide piece. After the particles are rounded by the gear rod, they are blown by the airflow and transferred to the inclined screen. Then, the round particles and the coarse particles are partitioned along the gradient holes, so that the particles that are evenly heated and round can be discharged independently, thereby avoiding the mixing of the round particles and the coarse particles.

[0018] 3. The present invention arranges evenly distributed springs at the bottom of the inclined screen. When the device is operated in a high-pressure or centrifugal manner, accompanied by the pressure of the airflow and particles on the inclined screen, the evenly distributed multiple springs will provide a reset thrust for the inclined screen. At this time, the inclined screen under vibration can forcibly screen the round particles and the rough particles, while avoiding the problem of particles clogging on the inclined screen. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 It is a schematic diagram of the present invention when used; Figure 2 For the present invention Figure 1 A three-dimensional schematic diagram of Figure 3 For the present invention Figure 2 Schematic diagram from top view; Figure 4 It is a schematic diagram of the material spraying mechanism of the present invention; Figure 5 For the present invention Figure 4The enlarged schematic diagram of point A in the middle; Figure 6 It is a partial schematic diagram of the present invention; Figure 7 It is a schematic diagram of the granulation mechanism and the air injection assembly of the present invention; Figure 8 is a schematic diagram of a particle screening mechanism of the present invention; Fig. 9 For the present invention Figure 8 Internal schematic diagram of Fig.10 For the present invention Fig. 9 A magnified schematic diagram of point B in the middle.

[0020] Reference numerals: 100, support assembly; 110, outrigger; 120, support rod; 130, footrest; 200, spraying mechanism; 210, transfer bin; 220, spray head; 230, sealing plug; 240, liquid injection pipe; 250, grouting pipe; 260, hydraulic component; 270, piston pad; 300, granulation mechanism; 310, ring gasket; 320, drying tower; 330, first assembly bolt; 340, material guide piece; 350, drainage partition; 400, jet assembly; 410, guide pipe; 420, anti-seepage pad net; 430, ring pipe; 440, air pipe; 500, particle screening mechanism; 510, top bin; 520, sealing cover; 530, drainage inner pad; 540, second combination bolt; 550, inclined screen; 560, positioning rod; 570, spring; 580, discharge notch; 600, partitioned material guide assembly; 610, discharge pipe; 620, pad; 630, coarse particle discharge chamber; 640, round particle discharge chamber. DETAILED DESCRIPTION

[0021] To make the purpose, technical solution and advantages of the present invention more clear, the present invention is further described in detail below in combination with specific implementations and with reference to the accompanying drawings. It should be noted that the embodiments of the present invention and the features in the embodiments can be combined with each other without conflict.

[0022] It is to be understood that these descriptions are exemplary only and are not intended to limit the scope of the invention.

[0023] A silicon nitride screening and granulation device provided by some embodiments of the present invention will be described below in conjunction with the accompanying drawings.

[0024] Embodiment 1: Combination Figure 1-Figure 10As shown, a silicon nitride screening and granulation device provided by the present invention includes a support component 100, a spraying mechanism 200 and a granulating mechanism 300 arranged on the support component 100, an air jet component 400 arranged outside the granulating mechanism 300, a particle screening mechanism 500 arranged on the granulating mechanism 300, and a multi-component zone material guiding component 600 arranged on the particle screening mechanism 500, the support component 100 is used to provide a sufficiently stable supporting force for the spraying mechanism 200 and the granulating mechanism 300, the spraying mechanism 200 is used to spray the mixed slurry upward at high pressure and provide an effective cleaning platform after the operation, the granulating mechanism 300 is used to directly spray the slurry, the air jet component 400 is used to quickly dry and solidify the reduced material after direct spraying, the particle screening mechanism 500 is used to provide a rounding platform for the slurry in a dry state, and the multi-component zone material guiding component 600 is used to transfer rounded particles and rough particles in different areas.

[0025] The support assembly 100 includes a plurality of legs 110 , a support rod 120 disposed within the legs 110 , and two pads 130 mounted on the top and bottom of the support rod 120 ; The granulation mechanism 300 includes a drying tower 320, the bottom of the drying tower 320 is provided with evenly distributed inclined holes, and the top of the drying tower 320 is provided with a material guide 340; The jet assembly 400 includes a guide tube 410 disposed in an inclined hole, an anti-seepage pad net 420 installed on the top of the guide tube 410, a ring tube 430 installed on the plurality of guide tubes 410, and an air pipe 440 installed on the ring tube 430; The air pipe 440 is used to transfer high-temperature airflow; The particle screening mechanism 500 includes a top bin 510 disposed on the top of the material guide member 340, and a drainage inner pad 530 is disposed on the top of the top bin 510; A spherical rounded groove is provided at the bottom of the drainage inner pad 530; The partitioned material guiding assembly 600 includes a discharge pipe 610 disposed inside the discharge slot 580, and a pad 620 is disposed in the inner cavity of the discharge pipe 610; A coarse particle discharge chamber 630 is provided on the top surface of the pad 620 and the top of the inner cavity of the discharge pipe 610, and the coarse particle discharge chamber 630 is used to transfer the coarse particles; A round particle discharge cavity 640 is provided on the bottom surface of the pad 620 and the bottom surface of the inner cavity of the discharge pipe 610, and the round particle discharge cavity 640 is used to transfer round particles.

[0026] Since the existing drying tower needs to spray the slurry upward from its bottom, and the top of the drying tower adopts the method of spraying high-temperature airflow downward to dry the slurry, the particles sprayed out and dried at this time have a huge height difference in the inner cavity of the drying tower. The dried and solidified particles fall from the top of the drying tower to the bottom, and there is a collision problem, which easily causes the particles to break. It is difficult to improve the roundness of the particles, and it will cause the round particles and rough particles to mix.

[0027] The device directly sprays the slurry from the inside of the nozzle 220 toward the middle of the inner cavity of the drying tower 320, and multiple evenly distributed guide tubes 410 are arranged in multiple inclined holes at the bottom of the drying tower 320. As the slurry is ejected, the multiple guide tubes 410 can spray the high-temperature airflow upward along the conical surface of the nozzle 220. At this time, the slurry can be pushed upward by the airflow after drying, and under the auxiliary effect and guidance of the spherical rolling groove at the bottom of the inner pad 530, the particles are pushed by the air pressure after drying and further rounded. At the same time, according to the granulation requirements, the support component 100 of the device can be set on a rotating platform. With the high pressure inside the drying tower 320, the particles can be fully rounded under the action of centrifugal force. Finally, the particles will pass through the inclined surface of the inclined screen 550, and the round particles and the coarse particles can be quickly screened.

[0028] Embodiment 2: Combination Figure 4-Figure 7 As shown, on the basis of embodiment 1, the spraying mechanism 200 includes a transfer bin 210, and a cylindrical cavity is opened inside the transfer bin 210, and a sealing plug 230 is arranged in the notch at the top of the transfer bin 210, and a hydraulic component 260 is arranged inside the transfer bin 210, and a piston pad 270 is installed at the top of the hydraulic sub-rod in the hydraulic component 260; A liquid injection pipe 240 is installed on one side of the outside of the transfer bin 210 , and a grouting pipe 250 is installed on the other side of the outside of the transfer bin 210 .

[0029] Preferably, when the piston pad 270 is located at the center of the water inlet notch and the slurry notch in the inner cavity of the transfer bin 210, the piston pad 270 can provide an anti-seepage pressure-bearing platform for the slurry to improve the constancy of the slurry injection pressure; When the piston pad 270 is located at the bottom of the water inlet slot of the inner cavity of the transfer bin 210, the slurry stops entering, and the injection pipe 240 can inject the cleaning solution into the cylindrical cavity, and finally the internal spray hole of the nozzle 220, the granulation mechanism 300, the jet assembly 400, the particle screening mechanism 500 and the multi-component zone guide assembly 600 are cleaned; According to the height of the piston pad 270 rising and falling in the cylindrical cavity, the needs of grouting and water injection can be selectively controlled.

[0030] A nozzle 220 is disposed at the top of the transfer bin 210 , and the nozzle 220 is a conical structure, and uniformly distributed spray holes are opened inside the nozzle 220 .

[0031] Preferably, a plurality of evenly distributed studs are provided at the bottom end of the nozzle 220, and the bolts are adapted to penetrate into the interior of the transfer bin 210, and a nut is provided on the studs; The sealing plug 230 is used to protect the studs and nuts to prevent moisture from corroding the studs and nuts prematurely.

[0032] The ports of the plurality of anti-seepage pad nets 420 are parallel to the conical surface of the nozzle 220; The piston pad 270 is movably installed in the cylindrical cavity in the transfer bin 210.

[0033] As the hydraulic component 260 operates, its internal hydraulic sub-rod pushes the piston pad 270 upward, and the gear rod slurry can enter smoothly. Following the guidance of the cylindrical cavity, the slurry will eventually be ejected upward from the internal spray hole of the nozzle 220 under high pressure, and cooperate with the evenly distributed multiple guide tubes 410 to directly blow along the conical surface of the nozzle 220. The directly sprayed slurry can be quickly dried and provide an upward thrust for the particles after drying, thereby effectively improving the roundness of the particles after rounding.

[0034] Embodiment 3: Combination Figure 6-Figure 10 As shown, on the basis of Example 1, the granulation mechanism 300 further includes a plurality of drainage baffles 350, a ring gasket 310 disposed at the bottom of the drying tower 320, and a fixing bolt is disposed in the transverse hole inside the ring gasket 310; A plurality of evenly distributed first assembly bolts 330 are disposed in the drying tower 320 and the material guide member 340 .

[0035] Preferably, a concave surface is provided on the top of the guide piece 340, and the concave surface on the top of the guide piece 340 can provide a sequential discharge path for the airflow and particles by cooperating with the spherical rounded groove at the bottom of the guide inner pad 530. Multiple discharge slots 580 are adapted through multiple sets of guide baffles 350. When the rounded particles are screened from the inside of the inclined screen 550 and fall on the concave surface on the top of the guide piece 340, the multiple sets of guide baffles 350 can quickly transfer the rounded particles to multiple discharge slots 580, thereby effectively improving the rapid discharge of the rounded particles after screening.

[0036] The outer eight-shaped structure formed by two adjacent drainage partitions 350 is adapted to the port inside the discharge slot 580; A plurality of guide baffles 350 are fixedly mounted on the concave surface at the top of the guide member 340 , and the concave surface at the top of the guide member 340 is used to guide the high-pressure airflow and provide a path for the round particles to be quickly emptied.

[0037] Preferably, the spherical rounded groove at the bottom of the guiding inner pad 530 and the concave surface at the top of the guide piece 340 form an S-shaped structure. At this time, the high-pressure airflow can quickly discharge the particles along the cavity of the S-shaped structure, while reducing the fragmentation of the particles due to impact due to height difference, and providing a high degree of roundness of the particles after granulation.

[0038] Embodiment 4: Combination Figure 7-Figure 10 As shown, on the basis of Example 1, the inner wall of the top bin 510 is provided with a plurality of evenly distributed discharge slots 580, the inner side of the top bin 510 is provided with an inclined screen 550, a sealing cover 520 is provided at the top of the top bin 510, and a plurality of evenly distributed second assembly bolts 540 are provided in the top bin 510 and the sealing cover 520; The sealing cover 520 is used to provide sufficient compressive support for the drainage inner pad 530; The cross section of the inclined screen 550 is L-shaped, and screen holes are provided on the inclined surface of the inclined screen 550, and the aperture of the screen holes gradually decreases from the inner end to the outer end of the inclined screen 550; A plurality of evenly distributed positioning rods 560 are provided at the bottom of the outer end of the inclined screen 550; A spring 570 is disposed outside the positioning rod 560 , and the plurality of springs 570 are used to provide a restoring force for the inclined screen 550 to vibrate.

[0039] Preferably, the pad 620 is fixedly installed in the inner cavity of the discharge pipe 610, and the positioning rod 560 is movably installed in the hole at the inner end of the pad 620. At this time, the bottom end of the spring 570 is under pressure on the top of the inner end of the pad 620. As the high-pressure and high-temperature airflow carries the rounded particles into the S-shaped cavity, the pressurized inclined screen 550 can cooperate with multiple springs 570 to perform high-frequency vibration. At this time, the rounded particles passing through the inclined surface of the inclined screen 550 can be quickly screened from the gradient sieve holes. At this time, the rounded particles can be effectively screened while avoiding the problem of particle blockage.

[0040] Working principle and use process of the present invention: In industrial production, the granulation methods of silicon nitride ceramic powder mainly include dry roller granulation technology, cold isostatic pressing technology, spray granulation technology, etc. Different from other oxide ceramic powders, silicon nitride ceramics are more sensitive to temperature during sintering, so there are higher requirements for the size of powder particles and the consistency of surface morphology; The device is configured using the spray granulation technology. When the hydraulic component 260 is running, it stops until the internal hydraulic rod pushes the piston pad 270 to rise to the middle position between the grouting port and the water spraying port of the transfer bin 210. Then, the grouting pipe 250 is used to inject the mixed slurry into the inner cavity of the transfer bin 210. At this time, the slurry in the pressurized state will be sprayed from the spray hole inside the nozzle 220 toward the cavity formed by the drying tower 320 and the guide member 340. At the same time, the air pipe 440 is connected to the external high-temperature gas pipeline. After the high-temperature airflow enters the inner part of the annular tube 430, it is transferred along the evenly distributed multiple flow guide tubes 410, and finally the high-temperature gas will blow directly toward the inclined surface of the grouting pipe 250. At this time, the slurry sprayed from the inner part of the grouting pipe 250 can be quickly formed into particles under the action of the obliquely blown high-temperature airflow. According to the granulation requirements of the device, the inner cavity of the device can be pressurized or a rotating platform can be set on the outside of the device to provide centrifugal force for the granulation of the device; As the solidified particles in the drying tower 320 and the guide member 340 actively surge upward, the particles are eventually transferred toward the concave surface of the top of the guide member 340 by the arc-shaped slope at the bottom of the guide inner pad 530, and the inclined screen 550 arranged on the concave surface of the top of the guide member 340 can gather the particles. At this time, the inclined screen 550 is vibrated by the dual effects of the high-pressure airflow and the particles. With the support of the inclined screen 550 by multiple springs 570, the suspended inclined screen 550 can vibrate the solidified particles. The surface screen 550 is provided with sieve holes inside, and the aperture of the sieve holes gradually decreases from the inner end to the outer end of the inclined screen 550. After the particles pass through the large holes and the small holes, the particles that are more rounded and evenly heated can be transferred through the sieve holes to the concave surface at the top of the guide piece 340, and guided by a plurality of guide baffles 350 to enter from the discharge slot 580. Finally, the rounded particles can be discharged from the round particle discharge chamber 640, and the rough and irregular particles remaining on the top surface of the inclined screen 550 can be discharged outward from the coarse particle discharge chamber 630.

[0041] Although the embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the claims and their equivalents.

Claims

1. A silicon nitride screening and granulation device, comprising a support assembly (100), characterized in that: It also includes a material spraying mechanism (200) and a granulating mechanism (300) arranged on the supporting assembly (100), an air jet assembly (400) arranged outside the granulating mechanism (300), a particle screening mechanism (500) arranged on the granulating mechanism (300), and a multi-component zone material guiding assembly (600) arranged on the particle screening mechanism (500); The support assembly (100) is used to provide a sufficiently stable support force for the spraying mechanism (200) and the granulating mechanism (300); The spraying mechanism (200) is used to spray the mixed slurry upwards at high pressure, and at the same time provides an effective cleaning platform after the operation; The granulation mechanism (300) comprises a drying tower (320), the bottom end of the drying tower (320) is provided with evenly distributed inclined holes, and the top of the drying tower (320) is provided with a material guide member (340); The jet assembly (400) comprises a flow guide pipe (410) arranged in the inclined hole and an anti-seepage pad net (420) installed on the top of the flow guide pipe (410); The particle screening mechanism (500) comprises a top bin (510) arranged on the top of the material guide member (340), and a drainage inner pad (530) is arranged on the top of the top bin (510); The bottom of the drainage inner pad (530) is provided with a spherical rounded groove; The multiple groups of partitioned material guiding components (600) are used to transfer the round particles and the rough particles in different partitions.

2. A silicon nitride screening and granulation equipment according to claim 1, characterized in that: The inner wall of the top bin (510) is provided with a plurality of evenly distributed discharge slots (580), and the inner side of the top bin (510) is provided with an inclined screen (550); The inclined screen (550) has an L-shaped cross-section, and screen holes are provided on the inclined surface of the inclined screen (550), and the apertures of the screen holes gradually decrease from the inner end to the outer end of the inclined screen (550); A plurality of evenly distributed positioning rods (560) are provided at the bottom of the outer end of the inclined screen (550); A spring (570) is arranged outside the positioning rod (560), and the plurality of springs (570) are used to provide a reset force for the inclined screen (550) to cause a screening vibration.

3. The silicon nitride screening and granulation equipment according to claim 1, characterized in that: The partitioned material guiding assembly (600) comprises a material discharge pipe (610) arranged inside the material discharge slot (580), and a pad (620) is arranged in the inner cavity of the material discharge pipe (610); A coarse particle discharge cavity (630) is provided on the top surface of the pad (620) and the top of the inner cavity of the discharge pipe (610), and the coarse particle discharge cavity (630) is used to transfer the coarse particles; The bottom surface of the pad (620) and the bottom surface of the inner cavity of the discharge pipe (610) are provided with a round particle discharge cavity (640), and the round particle discharge cavity (640) is used to transfer round particles.

4. The silicon nitride screening and granulation equipment according to claim 1, characterized in that: The material spraying mechanism (200) comprises a material transfer bin (210), wherein a cylindrical cavity is provided inside the material transfer bin (210), and a sealing plug (230) is provided in a notch at the top of the material transfer bin (210); A liquid injection pipe (240) is installed on one side of the outside of the transfer bin (210), and a grouting pipe (250) is installed on the other side of the outside of the transfer bin (210); A nozzle (220) is disposed at the top of the transfer bin (210), and the nozzle (220) is in a conical structure, and uniformly distributed nozzle holes are formed inside the nozzle (220); The ports of the plurality of anti-seepage pad nets (420) are parallel to the conical surface of the nozzle (220).

5. The silicon nitride screening and granulation equipment according to claim 4, characterized in that: The material spraying mechanism (200) further comprises a hydraulic component (260) arranged inside the material transfer bin (210), wherein a piston pad (270) is installed at the top end of a hydraulic sub-rod in the hydraulic component (260); The piston pad (270) is movably mounted in the cylindrical cavity in the transfer bin (210).

6. The silicon nitride screening and granulation equipment according to claim 1, characterized in that: The granulation mechanism (300) further comprises a ring gasket (310) arranged at the bottom of the drying tower (320), wherein a fixing bolt is arranged in a transverse hole inside the ring gasket (310); A plurality of evenly distributed groups of first assembly bolts (330) are arranged in the drying tower (320) and the material guide member (340).

7. The silicon nitride screening and granulation equipment according to claim 1, characterized in that: The granulation mechanism (300) further comprises a plurality of drainage baffles (350), and an outward-facing "eight" structure formed by two adjacent drainage baffles (350) is adapted to fit a port on the inner side of the discharge slot (580); The plurality of guide baffles (350) are fixedly mounted on the concave surface at the top of the guide member (340), and the concave surface at the top of the guide member (340) is used to guide the high-pressure airflow and provide a path for the round particles to be quickly emptied.

8. The silicon nitride screening and granulation equipment according to claim 1, characterized in that: The jet assembly (400) further comprises an annular tube (430) mounted on the plurality of flow guide tubes (410) and an air pipe (440) mounted on the annular tube (430); The air pipe (440) is used to transfer high-temperature airflow.

9. The silicon nitride screening and granulation equipment according to claim 1, characterized in that: The particle screening mechanism (500) further comprises a sealing cover (520) arranged at the top of the top bin (510), and a plurality of groups of second assembly bolts (540) arranged in the top bin (510) and the sealing cover (520) and evenly distributed; The sealing cover (520) is used to provide sufficient compressive support for the drainage inner pad (530).

10. The silicon nitride screening and granulation equipment according to claim 1, characterized in that: The support assembly (100) comprises a plurality of legs (110), a support rod (120) arranged in the legs (110), and two pads (130) installed on the top and bottom of the support rod (120).

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