CN116808997A - Reactor for synthesizing silicon nitride powder - Google Patents
Reactor for synthesizing silicon nitride powder Download PDFInfo
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- CN116808997A CN116808997A CN202310778151.9A CN202310778151A CN116808997A CN 116808997 A CN116808997 A CN 116808997A CN 202310778151 A CN202310778151 A CN 202310778151A CN 116808997 A CN116808997 A CN 116808997A
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- ball milling
- crushing
- silicon nitride
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- silicon
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- 229910052581 Si3N4 Inorganic materials 0.000 title claims abstract description 78
- HQVNEWCFYHHQES-UHFFFAOYSA-N silicon nitride Chemical compound N12[Si]34N5[Si]62N3[Si]51N64 HQVNEWCFYHHQES-UHFFFAOYSA-N 0.000 title claims abstract description 78
- 239000000843 powder Substances 0.000 title claims abstract description 76
- 230000002194 synthesizing effect Effects 0.000 title claims abstract description 18
- 238000000498 ball milling Methods 0.000 claims abstract description 128
- 230000007246 mechanism Effects 0.000 claims abstract description 109
- XUIMIQQOPSSXEZ-UHFFFAOYSA-N Silicon Chemical compound [Si] XUIMIQQOPSSXEZ-UHFFFAOYSA-N 0.000 claims abstract description 104
- 229910052710 silicon Inorganic materials 0.000 claims abstract description 82
- 239000010703 silicon Substances 0.000 claims abstract description 82
- 238000012216 screening Methods 0.000 claims abstract description 71
- 239000002245 particle Substances 0.000 claims abstract description 53
- 239000000463 material Substances 0.000 claims abstract description 29
- 238000005096 rolling process Methods 0.000 claims description 32
- 238000000227 grinding Methods 0.000 claims description 21
- 238000003756 stirring Methods 0.000 claims description 12
- 238000005520 cutting process Methods 0.000 claims description 10
- 241000579971 Terebridae Species 0.000 claims description 9
- 239000002305 electric material Substances 0.000 claims description 8
- 230000005540 biological transmission Effects 0.000 claims description 6
- 230000000903 blocking effect Effects 0.000 claims description 6
- 239000011863 silicon-based powder Substances 0.000 abstract description 22
- 238000013461 design Methods 0.000 abstract description 5
- 238000004519 manufacturing process Methods 0.000 abstract description 2
- 238000010298 pulverizing process Methods 0.000 abstract description 2
- 238000000034 method Methods 0.000 description 15
- 239000008187 granular material Substances 0.000 description 8
- 229910000831 Steel Inorganic materials 0.000 description 7
- 230000009286 beneficial effect Effects 0.000 description 7
- 239000010959 steel Substances 0.000 description 7
- 238000001308 synthesis method Methods 0.000 description 6
- 239000004484 Briquette Substances 0.000 description 5
- 238000006243 chemical reaction Methods 0.000 description 5
- 238000002360 preparation method Methods 0.000 description 5
- 230000008569 process Effects 0.000 description 5
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 description 4
- 230000009471 action Effects 0.000 description 4
- 238000010586 diagram Methods 0.000 description 4
- 238000005121 nitriding Methods 0.000 description 4
- 230000000694 effects Effects 0.000 description 3
- 239000002994 raw material Substances 0.000 description 3
- QGZKDVFQNNGYKY-UHFFFAOYSA-N Ammonia Chemical compound N QGZKDVFQNNGYKY-UHFFFAOYSA-N 0.000 description 2
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 description 2
- 230000007547 defect Effects 0.000 description 2
- 235000013312 flour Nutrition 0.000 description 2
- 239000007789 gas Substances 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 238000012856 packing Methods 0.000 description 2
- 238000007789 sealing Methods 0.000 description 2
- 239000000377 silicon dioxide Substances 0.000 description 2
- 239000000126 substance Substances 0.000 description 2
- 238000003786 synthesis reaction Methods 0.000 description 2
- 230000000007 visual effect Effects 0.000 description 2
- 230000004075 alteration Effects 0.000 description 1
- 229910021529 ammonia Inorganic materials 0.000 description 1
- 238000013459 approach Methods 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- 239000000919 ceramic Substances 0.000 description 1
- 235000013339 cereals Nutrition 0.000 description 1
- 238000005229 chemical vapour deposition Methods 0.000 description 1
- 238000007796 conventional method Methods 0.000 description 1
- 230000007797 corrosion Effects 0.000 description 1
- 238000005260 corrosion Methods 0.000 description 1
- 238000007599 discharging Methods 0.000 description 1
- 238000009826 distribution Methods 0.000 description 1
- 238000010292 electrical insulation Methods 0.000 description 1
- 230000005611 electricity Effects 0.000 description 1
- 238000001125 extrusion Methods 0.000 description 1
- 230000005484 gravity Effects 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 238000005272 metallurgy Methods 0.000 description 1
- 238000002156 mixing Methods 0.000 description 1
- 229910021421 monocrystalline silicon Inorganic materials 0.000 description 1
- 229910052757 nitrogen Inorganic materials 0.000 description 1
- 230000003647 oxidation Effects 0.000 description 1
- 238000007254 oxidation reaction Methods 0.000 description 1
- 229910021420 polycrystalline silicon Inorganic materials 0.000 description 1
- 229920005591 polysilicon Polymers 0.000 description 1
- 238000009700 powder processing Methods 0.000 description 1
- 230000009467 reduction Effects 0.000 description 1
- 238000004904 shortening Methods 0.000 description 1
- 239000011856 silicon-based particle Substances 0.000 description 1
- 238000003980 solgel method Methods 0.000 description 1
- 238000005979 thermal decomposition reaction Methods 0.000 description 1
Classifications
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01J—CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS
- B01J19/00—Chemical, physical or physico-chemical processes in general; Their relevant apparatus
- B01J19/18—Stationary reactors having moving elements inside
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01F—MIXING, e.g. DISSOLVING, EMULSIFYING OR DISPERSING
- B01F27/00—Mixers with rotary stirring devices in fixed receptacles; Kneaders
- B01F27/80—Mixers with rotary stirring devices in fixed receptacles; Kneaders with stirrers rotating about a substantially vertical axis
- B01F27/90—Mixers with rotary stirring devices in fixed receptacles; Kneaders with stirrers rotating about a substantially vertical axis with paddles or arms
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01F—MIXING, e.g. DISSOLVING, EMULSIFYING OR DISPERSING
- B01F33/00—Other mixers; Mixing plants; Combinations of mixers
- B01F33/80—Mixing plants; Combinations of mixers
- B01F33/83—Mixing plants specially adapted for mixing in combination with disintegrating operations
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01F—MIXING, e.g. DISSOLVING, EMULSIFYING OR DISPERSING
- B01F33/00—Other mixers; Mixing plants; Combinations of mixers
- B01F33/80—Mixing plants; Combinations of mixers
- B01F33/836—Mixing plants; Combinations of mixers combining mixing with other treatments
- B01F33/8361—Mixing plants; Combinations of mixers combining mixing with other treatments with disintegrating
- B01F33/83612—Mixing plants; Combinations of mixers combining mixing with other treatments with disintegrating by crushing or breaking
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01F—MIXING, e.g. DISSOLVING, EMULSIFYING OR DISPERSING
- B01F33/00—Other mixers; Mixing plants; Combinations of mixers
- B01F33/80—Mixing plants; Combinations of mixers
- B01F33/836—Mixing plants; Combinations of mixers combining mixing with other treatments
- B01F33/8361—Mixing plants; Combinations of mixers combining mixing with other treatments with disintegrating
- B01F33/83613—Mixing plants; Combinations of mixers combining mixing with other treatments with disintegrating by grinding or milling
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01J—CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS
- B01J19/00—Chemical, physical or physico-chemical processes in general; Their relevant apparatus
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01J—CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS
- B01J19/00—Chemical, physical or physico-chemical processes in general; Their relevant apparatus
- B01J19/0053—Details of the reactor
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01J—CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS
- B01J19/00—Chemical, physical or physico-chemical processes in general; Their relevant apparatus
- B01J19/0053—Details of the reactor
- B01J19/0066—Stirrers
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B02—CRUSHING, PULVERISING, OR DISINTEGRATING; PREPARATORY TREATMENT OF GRAIN FOR MILLING
- B02C—CRUSHING, PULVERISING, OR DISINTEGRATING IN GENERAL; MILLING GRAIN
- B02C17/00—Disintegrating by tumbling mills, i.e. mills having a container charged with the material to be disintegrated with or without special disintegrating members such as pebbles or balls
- B02C17/02—Disintegrating by tumbling mills, i.e. mills having a container charged with the material to be disintegrated with or without special disintegrating members such as pebbles or balls with perforated container
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B02—CRUSHING, PULVERISING, OR DISINTEGRATING; PREPARATORY TREATMENT OF GRAIN FOR MILLING
- B02C—CRUSHING, PULVERISING, OR DISINTEGRATING IN GENERAL; MILLING GRAIN
- B02C17/00—Disintegrating by tumbling mills, i.e. mills having a container charged with the material to be disintegrated with or without special disintegrating members such as pebbles or balls
- B02C17/10—Disintegrating by tumbling mills, i.e. mills having a container charged with the material to be disintegrated with or without special disintegrating members such as pebbles or balls with one or a few disintegrating members arranged in the container
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B02—CRUSHING, PULVERISING, OR DISINTEGRATING; PREPARATORY TREATMENT OF GRAIN FOR MILLING
- B02C—CRUSHING, PULVERISING, OR DISINTEGRATING IN GENERAL; MILLING GRAIN
- B02C17/00—Disintegrating by tumbling mills, i.e. mills having a container charged with the material to be disintegrated with or without special disintegrating members such as pebbles or balls
- B02C17/18—Details
- B02C17/183—Feeding or discharging devices
- B02C17/1835—Discharging devices combined with sorting or separating of material
- B02C17/1855—Discharging devices combined with sorting or separating of material with separator defining termination of crushing zone, e.g. screen denying egress of oversize material
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B02—CRUSHING, PULVERISING, OR DISINTEGRATING; PREPARATORY TREATMENT OF GRAIN FOR MILLING
- B02C—CRUSHING, PULVERISING, OR DISINTEGRATING IN GENERAL; MILLING GRAIN
- B02C23/00—Auxiliary methods or auxiliary devices or accessories specially adapted for crushing or disintegrating not provided for in preceding groups or not specially adapted to apparatus covered by a single preceding group
- B02C23/08—Separating or sorting of material, associated with crushing or disintegrating
- B02C23/16—Separating or sorting of material, associated with crushing or disintegrating with separator defining termination of crushing or disintegrating zone, e.g. screen denying egress of oversize material
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B02—CRUSHING, PULVERISING, OR DISINTEGRATING; PREPARATORY TREATMENT OF GRAIN FOR MILLING
- B02C—CRUSHING, PULVERISING, OR DISINTEGRATING IN GENERAL; MILLING GRAIN
- B02C4/00—Crushing or disintegrating by roller mills
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B02—CRUSHING, PULVERISING, OR DISINTEGRATING; PREPARATORY TREATMENT OF GRAIN FOR MILLING
- B02C—CRUSHING, PULVERISING, OR DISINTEGRATING IN GENERAL; MILLING GRAIN
- B02C4/00—Crushing or disintegrating by roller mills
- B02C4/02—Crushing or disintegrating by roller mills with two or more rollers
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B02—CRUSHING, PULVERISING, OR DISINTEGRATING; PREPARATORY TREATMENT OF GRAIN FOR MILLING
- B02C—CRUSHING, PULVERISING, OR DISINTEGRATING IN GENERAL; MILLING GRAIN
- B02C4/00—Crushing or disintegrating by roller mills
- B02C4/28—Details
- B02C4/286—Feeding devices
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- C—CHEMISTRY; METALLURGY
- C01—INORGANIC CHEMISTRY
- C01B—NON-METALLIC ELEMENTS; COMPOUNDS THEREOF; METALLOIDS OR COMPOUNDS THEREOF NOT COVERED BY SUBCLASS C01C
- C01B21/00—Nitrogen; Compounds thereof
- C01B21/06—Binary compounds of nitrogen with metals, with silicon, or with boron, or with carbon, i.e. nitrides; Compounds of nitrogen with more than one metal, silicon or boron
- C01B21/068—Binary compounds of nitrogen with metals, with silicon, or with boron, or with carbon, i.e. nitrides; Compounds of nitrogen with more than one metal, silicon or boron with silicon
- C01B21/0682—Preparation by direct nitridation of silicon
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B02—CRUSHING, PULVERISING, OR DISINTEGRATING; PREPARATORY TREATMENT OF GRAIN FOR MILLING
- B02C—CRUSHING, PULVERISING, OR DISINTEGRATING IN GENERAL; MILLING GRAIN
- B02C23/00—Auxiliary methods or auxiliary devices or accessories specially adapted for crushing or disintegrating not provided for in preceding groups or not specially adapted to apparatus covered by a single preceding group
- B02C23/08—Separating or sorting of material, associated with crushing or disintegrating
- B02C23/16—Separating or sorting of material, associated with crushing or disintegrating with separator defining termination of crushing or disintegrating zone, e.g. screen denying egress of oversize material
- B02C2023/165—Screen denying egress of oversize material
Abstract
The invention provides a reactor for synthesizing silicon nitride powder, which relates to the technical field of silicon nitride production and comprises a base, wherein a silicon block smashing and ball milling mechanism, a reactor main body, a silicon nitride block ball milling mechanism and a specification screening mechanism are arranged on the base; the silicon block crushing and ball milling mechanism is internally provided with a crushing diameter particle screening plate and a ball milling diameter particle screening net. The invention firstly pulverizes the silicon block to the preset diameter particle, then carries out ball milling, increases the pulverizing step before ball milling, greatly shortens the time for ball milling, simultaneously sets the ball milling diameter particle screening net, can screen the diameter particle of the silicon powder, ensures that the silicon powder diameter particle automatically falls into the material conveying auger when reaching the preset diameter particle, and the design of the specification screening mechanism can screen the silicon powder 3 N 4 The fine powder is subjected to specification screening, and Si with different specifications is subjected to 3 N 4 The fine powder is classified and packed, so that the delivery quality of the silicon nitride powder is improved.
Description
Technical Field
The invention relates to the technical field of silicon nitride production, in particular to a reactor for synthesizing silicon nitride powder.
Background
Silicon nitride (Si) 3 N 4 ) Is an important ceramic structure material, has the characteristics of small density and thermal expansion coefficient, large hardness, high elastic modulus, good thermal stability, chemical stability, good electrical insulation property and the like, is corrosion-resistant and oxidation-resistant, has the advantages of small surface friction coefficient and the like, and is widely applied to the fields of metallurgy, chemical industry, machinery, aviation, aerospace, energy and the like;
the synthetic preparation method of the silicon nitride comprises the following steps: silicon powder direct nitriding method, carbothermal reduction method, thermal decomposition method, sol-gel method, chemical vapor deposition method and self-propagating method; wherein, the silicon powder direct nitriding synthesis method has simple process flow and low equipment requirement, and the raw material is polysilicon or monocrystalline silicon, has rich raw material sources and is one of the synthesis methods with the lowest costThe synthesis method of the method comprises the following steps: the silicon powder is placed in the preparation gas (ammonia or nitrogen) to be directly nitrided into Si at high temperature 3 N 4 Powder blocks;
the reaction equation is:
3Si+2N 2 →Si 3 N 4 ；
3Si+4NH 3 →Si 3 N 4 +6H 2 ；
a process flow diagram (as shown in fig. 7);
the method mainly has the following defects:
(1) Ball milling is carried out on the massive silicon before nitriding, and the ball milling process is generally carried out in a way of directly mixing the steel balls with the massive silicon and continuously stirring, so that ball milling of the to-be-milled object is realized, the grinding efficiency is low, and the preparation efficiency of the direct nitriding synthesis method of the silicon powder is reduced;
(2) The subsequent reaction efficiency is reduced when the diameter particles of the silicon powder after ball milling are larger than the preset diameter particles, more time is wasted in the ball milling stage when the diameter particles of the silicon powder are far smaller than the preset diameter particles, and Si is reduced 3 N 4 The powder processing efficiency is determined by a visual observation method after ball milling, so as to judge whether the silicon powder particle reaches a preset particle diameter or not, however, visual observation judgment standards are different, and workers are required to intermittently observe the powder, so that time and labor are wasted;
(3) Si obtained by the reaction 3 N 4 The particle size distribution of the powder is wider, the powder can meet the quality requirement by further grinding, and the conventional method only comprises the steps of 3 N 4 The powder block is finely ground for a certain period of time to start discharging, however, the fine grinding for a certain period of time cannot completely ensure Si 3 N 4 The powder blocks reach the preset diameter grains, and the working state of the machine and the size of the grinding balls can influence the final Si 3 N 4 The particle size of the powder starts to discharge if the powder is finely ground for a certain period of time, and the powder with different particle sizes is mixed together, so that the delivery quality of the silicon nitride powder is seriously affected;
if the defects of the direct silicon nitride synthesis method can be overcome, and the direct silicon nitride synthesis method has the characteristics of simple process flow, low equipment requirement, and abundant raw material sources, and the preparation cost of the silicon nitride can be greatly reduced by adopting the method, so that the reactor for synthesizing the silicon nitride powder is provided.
Disclosure of Invention
The invention provides a reactor for synthesizing silicon nitride powder, which is used for solving at least one technical problem in the background art.
In order to solve the technical problems, the invention discloses a reactor for synthesizing silicon nitride powder, which comprises a base, wherein a silicon block smashing and ball milling mechanism, a reactor main body, a silicon nitride powder block ball milling mechanism and a specification screening mechanism are arranged on the base;
the silicon block crushing and ball milling mechanism is internally provided with a crushing diameter particle screening plate and a ball milling diameter particle screening net.
Preferably, the silicon briquette crushing ball milling mechanism comprises an anti-blocking cylinder, the anti-blocking cylinder is fixedly connected to a crushing ball milling mechanism shell of the silicon briquette crushing ball milling mechanism, a silicon briquette feeding hopper is fixedly connected to the anti-blocking cylinder, an anti-blocking distributing roller is connected to the anti-blocking cylinder in a rotating mode, a crushing diameter particle screening plate is connected to the crushing ball milling mechanism shell in a sliding mode left and right, the crushing diameter particle screening plate is divided into a crushing cavity and a ball milling cavity in the crushing ball milling mechanism shell, a crushing assembly is arranged in the crushing cavity, the ball milling assembly is arranged in the ball milling cavity, an electric sector tooth is connected to the crushing ball milling mechanism shell in a rotating mode, and the electric sector tooth is used for being meshed with the crushing diameter particle screening plate.
Preferably, the anti-blocking material distributing roller comprises an electric material distributing roller rotating shaft and a plurality of material distributing blades fixedly connected to the electric material distributing roller rotating shaft, and the section of each material distributing blade is V-shaped.
Preferably, the crushing assembly comprises an electric crushing roller, the electric crushing roller is rotationally connected in a crushing cavity, two sides of the crushing cavity are rotationally connected with two symmetrically arranged electric turntables, a pushing connecting rod is hinged to the electric turntables, one end of the pushing connecting rod, far away from the electric turntables, is hinged to a cutting block, the cutting block is slidably connected in a crushing ball milling mechanism shell, and the cutting block is used for being matched with the electric crushing roller.
Preferably, the ball-milling assembly comprises a driving rolling belt wheel and a plurality of rolling shafts which are uniformly and rotatably connected in the ball-milling cavity, the driving rolling belt wheel is coaxial with the electric sector gear, the rolling belt wheel is fixedly connected with an execution rolling belt wheel and a rolling roller, the rolling shaft at the leftmost side is fixedly connected with a middle belt wheel, the middle belt wheel is connected with the driving rolling belt wheel through a first transmission belt, the plurality of execution rolling belt wheels are connected through a second transmission belt, the inner wall of the ball-milling cavity is provided with two symmetrically arranged guide plates below the rolling roller, the silicon block ball mill is rotationally connected below the guide plates, the ball-milling diameter particle screening net is arranged on the silicon block ball mill, and the bottom surface of a shell of the grinding ball-milling mechanism is an inclined surface.
Preferably, the material conveying auger comprises an auger shell, an auger main body is rotationally connected to the auger shell, a first guide rod is fixedly connected to the inside of the outlet end of the auger shell, a first conical plug is connected to the first guide rod in a vertical sliding mode, a T-shaped feeding pipe body is connected to the reactor main body in a vertical sliding mode, an L-shaped push rod is fixedly connected to the inner wall of the T-shaped feeding pipe body, a first electromagnet is fixedly connected to the inner wall of the reactor main body, a second electromagnet is fixedly connected to the T-shaped feeding pipe body, the first electromagnet is connected with the second electromagnet through a reset elastic piece, a connecting rod is fixedly connected to the first electromagnet, and one end, far away from the first electromagnet, of the connecting rod is fixedly connected with the second conical plug.
Preferably, be equipped with drive assembly in the base, drive assembly is used for driving the work of silicon nitride powder piece ball-milling mechanism and specification screening mechanism, drive reactor main part rotates simultaneously, drive assembly includes linear electric motor, linear electric motor fixed connection is in the base, linear electric motor output fixedly connected with connecting plate, fixedly connected with driving motor on the connecting plate, be equipped with first output shaft and second output shaft on the motor, first output shaft and second output shaft rotate and connect in the base, the base internal rotation is connected with first reducing pivot, first reducing pivot is used for with first output shaft intermeshing, fixedly connected with first bevel gear and first rotary gear in the first reducing pivot, the base internal rotation is connected with first pivot, first rotary gear both ends are fixedly connected with second rotary gear and third rotary gear respectively, fixedly connected with first rotatory ring gear on the reactor main part, second rotary gear is used for with first rotary gear intermeshing, first rotary ring is used for with third rotary gear intermeshing.
Preferably, stirring paddles are arranged in the reactor main body.
Preferably, the base is rotationally connected with a second reducing rotating shaft and a second rotating shaft, the second reducing rotating shaft is used for being meshed with a second output shaft, a second bevel gear is fixedly connected to the second reducing rotating shaft, a third bevel gear and a ball milling mechanism meshing gear are fixedly connected to the second rotating shaft, a second rotary meshing toothed ring is fixedly connected to a silicon nitride block ball milling mechanism barrel of the silicon nitride block ball milling mechanism, and the ball milling mechanism meshing gear is meshed with the second rotary meshing toothed ring.
Preferably, the specification screening mechanism comprises a specification screening mechanism shell, a powder stirring paddle is arranged in the specification screening mechanism shell, an outlet end of the silicon nitride powder ball milling mechanism is positioned in the specification screening mechanism shell, a first gear is fixedly connected to the powder stirring paddle, a third rotating shaft is rotationally connected to the base, a second gear and a third gear are fixedly connected to the third rotating shaft, a fourth gear is fixedly connected to the second reducing rotating shaft, the first gear is used for being meshed with the second gear, the third gear is used for being meshed with the fourth gear, a negative pressure cavity is arranged in the specification screening mechanism shell, a negative pressure channel is arranged on the negative pressure cavity, a material blocking net is arranged at the position of the negative pressure channel, a negative pressure generating component is arranged at one end of the negative pressure channel, which is far away from the material blocking net, and a powder outlet is arranged at the bottom of the negative pressure cavity.
The technical scheme of the invention is further described in detail through the drawings and the embodiments.
Compared with the prior art, the invention has the following beneficial effects:
1. according to the invention, the silicon blocks are crushed into the particles with the preset diameter, then the particles are subjected to ball milling, the crushing step is added before the ball milling, the time for ball milling is greatly shortened, meanwhile, the ball milling particle screening net is arranged, the particles of silicon powder can be screened, and the silicon powder particles are ensured to automatically fall into the conveying auger when reaching the preset particle;
2. si can be processed by the design of a specification screening mechanism 3 N 4 The fine powder is subjected to specification screening, and Si with different specifications is subjected to 3 N 4 The fine powder is classified and packed, so that the delivery quality of the silicon nitride powder is improved.
Drawings
The accompanying drawings are included to provide a further understanding of the invention and are incorporated in and constitute a part of this specification, illustrate the invention and together with the embodiments of the invention, serve to explain the invention. In the drawings:
FIG. 1 is a schematic diagram of the overall structure of the present invention;
FIG. 2 is a schematic structural view of a silicon block crushing and ball milling mechanism of the invention;
FIG. 3 is a cross-sectional view taken at B-B of FIG. 2 in accordance with the present invention;
FIG. 4 is a schematic view of the structure of FIG. 1A according to the present invention;
FIG. 5 is a schematic diagram of the installation of the ball milling mechanism and the specification screening mechanism of the silicon nitride powder block according to the invention;
fig. 6 is a schematic view of the structure of fig. 5 at C according to the present invention.
Fig. 7 is a prior art process flow diagram.
In the figure: 1. a base; 2. a silicon block crushing and ball milling mechanism; 200. crushing a particle screening plate; 2000. ball milling and particle screening net; 2001. an anti-blocking cylinder; 2002. a crushing ball milling mechanism shell; 2003. a silicon briquette feed hopper; 2004. anti-blocking material distributing rollers; 2005. a crushing cavity; 2006. ball milling cavity; 2007. electric sector teeth; 2008. an electric feed roller rotating shaft; 2009. a material distributing blade; 201. an electric pulverizing roller; 2010. an electric turntable; 2011. pushing the connecting rod; 2012. cutting the blocks; 2014. rolling the rotating shaft; 2015. performing rolling belt wheel; 2016. a roller; 2017. a first belt; 2018. a middle belt wheel; 2019. a second belt; 202. a material guide plate; 2020. a silicon block ball mill; 2021. a silicon block feeding electric gate plate; 3. a reactor body; 4. a silicon nitride powder block ball milling mechanism; 400. feeding electric flashboard of silicon nitride powder block; 401. silicon nitride powder ball milling mechanism cylinder; 402. silicon nitride powder screen mesh; 5. a specification screening mechanism; 6. a material conveying auger; 600. an auger housing; 6000. a packing auger body; 6001. a first guide bar; 6002. a first conical plug; 6003. a T-shaped feeding pipe body; 6004. an L-shaped push rod; 6005. a first electromagnet; 6006. a second electromagnet; 6007. a return elastic member; 6008. a connecting rod piece; 6009. a second conical plug; 7. a linear motor; 700. a connecting plate; 7000. a motor; 7001. a first output shaft; 7002. a second output shaft; 7003. a first bevel gear; 7004. a first diameter-variable rotating shaft; 7005. a first rotary gear; 7006. a first rotating shaft; 7007. a second rotary gear; 7008. a third rotary gear; 7009. a first rotary toothed ring; 701. a second diameter-variable rotating shaft; 7010. a second bevel gear; 7011. a second rotating shaft; 7012. a third bevel gear; 7013. the ball milling mechanism is meshed with the gear; 7014. a second rotationally engaged ring gear; 8. stirring paddles.
Detailed Description
The preferred embodiments of the present invention will be described below with reference to the accompanying drawings, it being understood that the preferred embodiments described herein are for illustration and explanation of the present invention only, and are not intended to limit the present invention.
In addition, the descriptions of the "first," "second," and the like, herein are for descriptive purposes only and are not intended to be specifically construed as order or sequence, nor are they intended to limit the invention solely for distinguishing between components or operations described in the same technical term, but are not to be construed as indicating or implying any relative importance or order of such features. Thus, a feature defining "a first" or "a second" may explicitly or implicitly include at least one such feature. In addition, technical solutions and technical features between the embodiments may be combined with each other, but it is necessary to base that a person skilled in the art can implement the combination of technical solutions, when the combination of technical solutions contradicts or cannot be implemented, should be considered that the combination of technical solutions does not exist, and is not within the scope of protection claimed by the present invention.
The invention provides the following examples
Example 1
The embodiment of the invention provides a reactor for synthesizing silicon nitride powder, which is shown in figures 1-6, and comprises a base 1, wherein a silicon block smashing and ball milling mechanism 2, a reactor main body 3, a silicon nitride block ball milling mechanism 4 and a specification screening mechanism 5 are arranged on the base 1, the outlet end of the silicon block smashing and ball milling mechanism 2 is communicated with the inlet end of a conveying auger 6, the outlet end of the conveying auger 6 is communicated with the inlet end of the reactor main body 3, the outlet end of the reactor main body 3 is communicated with the inlet end of the silicon nitride block ball milling mechanism 4, and the outlet end of the silicon nitride block ball milling mechanism 4 is communicated with the inlet end of the specification screening mechanism 5;
the silicon briquette crushing and ball milling mechanism 2 is internally provided with a crushing diameter particle screening plate 200 and a ball milling diameter particle screening net 2000.
The working principle and the beneficial effects of the technical scheme are as follows: during operation, the silicon blocks are put into the silicon block smashing and ball milling mechanism 2, the silicon block smashing and ball milling mechanism 2 smashes the silicon blocks to form smashed silicon blocks firstly, the smashed silicon blocks are screened through the smashing granule screening plate 200, the smashed silicon blocks with actual granule diameter smaller than the mesh diameter of the smashing granule screening plate 200 are screened out, then ball milling is carried out on the smashed silicon blocks to form silicon powder, the silicon powder with granule diameter smaller than the mesh diameter of the ball milling granule screening net 2000 is screened out through the ball milling granule screening net 2000 and is delivered to the delivery auger 6, the silicon powder with granule diameter smaller than the mesh diameter of the ball milling granule screening net 2000 is standard silicon powder, the standard silicon powder is delivered to the reactor main body 3 through the delivery auger 6, then preparation gas is introduced into the reactor main body 3, and the reactor main body 3 is heated, so that chemical reaction occurs in the reactor main body 3 to generate Si 3 N 4 Powder, after the reaction, si is added 3 N 4 Pouring the powder blocks into a silicon nitride powder block ball milling mechanism 4 for ball milling to form Si 3 N 4 Fine powder, then Si 3 N 4 Pouring the fine powder into a specification screening mechanism 5 for Si 3 N 4 The fine powder is subjected to specification screening, and Si with different specifications is subjected to 3 N 4 Classifying and packing the fine powder;
firstly, crushing the silicon blocks into particles with preset diameters, then ball milling the particles, and adding the step of crushing before ball milling, thereby greatly shortening the time for ball millingThe ball-milling diameter particle screening net 2000 is arranged simultaneously, so that the diameter particles of the silicon powder can be screened, the silicon powder diameter particles can be ensured to automatically fall into the conveying auger 6 when reaching the preset diameter particles, and the design of the specification screening mechanism 5 can be used for screening Si 3 N 4 The fine powder is subjected to specification screening, and Si with different specifications is subjected to 3 N 4 The fine powder is classified and packed, so that the delivery quality of the silicon nitride powder is improved.
Example 2
On the basis of the embodiment 1, the silicon block crushing ball milling mechanism 2 comprises an anti-blocking cylinder 2001, the anti-blocking cylinder 2001 is fixedly connected to a crushing ball milling mechanism shell 2002 of the silicon block crushing ball milling mechanism 2, a silicon block feeding hopper 2003 is fixedly connected to the anti-blocking cylinder 2001, an anti-blocking material separating roller 2004 is connected to the anti-blocking cylinder 2001 in a rotating mode, a crushing diameter particle screening plate 200 is connected in the crushing ball milling mechanism shell 2002 in a left-right sliding mode, the crushing diameter particle screening plate 200 divides the inside of the crushing ball milling mechanism shell 2002 into a crushing cavity 2005 and a ball milling cavity 2006, a crushing assembly is arranged in the crushing cavity 2005, a ball milling assembly is arranged in the ball milling cavity 2006, an electric sector tooth 2007 is connected to the crushing ball milling mechanism shell 2002 in a rotating mode, and the electric sector tooth 2007 is used for being meshed with the crushing diameter particle screening plate 200;
the anti-blocking material distributing roller 2004 comprises an electric material distributing roller rotating shaft 2008 and a plurality of material distributing blades 2009 fixedly connected to the electric material distributing roller rotating shaft 2008, wherein the section of the material distributing blades 2009 is V-shaped;
the crushing assembly comprises an electric crushing roller 201, the electric crushing roller 201 is rotationally connected in a crushing cavity 2005, two symmetrically arranged electric turntables 2010 are rotationally connected to the front side and the rear side of the crushing cavity 2005, a pushing connecting rod 2011 is hinged to the electric turntables 2010, a cutting block 2012 is hinged to one end of the pushing connecting rod 2011, which is far away from the electric turntables 2010, the cutting block 2012 is slidingly connected in a crushing ball milling mechanism shell 2002, and the cutting block 2012 is used for being matched with the electric crushing roller 201;
the ball milling assembly comprises a driving rolling pulley 2013 and a plurality of rolling rotating shafts 2014 which are uniformly and rotatably connected in a ball milling cavity 2006, the driving rolling pulley 2013 is coaxial with an electric sector gear 2007, an execution rolling pulley 2015 and a rolling roller 2016 are fixedly connected to the rolling rotating shafts 2014, a middle pulley 2018 is fixedly connected to the rolling rotating shafts 2014 at the leftmost side, the middle pulley 2018 is connected with the driving rolling pulley 2013 through a first transmission belt 2017, a plurality of execution rolling pulleys 2015 are connected through a second transmission belt 2019, two symmetrically arranged guide plates 202 are arranged on the inner wall of the ball milling cavity 2006 and below the rolling roller 2016, a silicon block ball mill 2020 is rotatably connected to the lower portion of the guide plates 202, a ball milling diameter particle screening net 2000 is arranged on the silicon block ball mill 2020, and the bottom surface of a shell 2002 of the grinding ball milling mechanism is an inclined surface.
Preferably, a silicon block ball mill 2020 is slidingly coupled with a silicon block feed ram 2021.
The working principle and the beneficial effects of the technical scheme are as follows: during operation, silicon blocks are put into a silicon block feeding hopper 2003, then an electric material distributing roller rotating shaft 2008 rotates, the electric material distributing roller rotating shaft 2008 rotates to drive a material distributing blade 2009 to rotate, the material distributing blade 2009 rotates to divide the put-in silicon blocks into a plurality of parts and sequentially feed the silicon blocks into a crushing cavity 2005, the design of the material distributing blade 2009 avoids the situation that a feeding hole of a shell 2002 of a crushing ball milling mechanism is blocked when the silicon blocks are put into the silicon blocks too quickly, the silicon blocks entering the crushing cavity 2005 are crushed and broken to form silicon blocks under the cooperation of an electric crushing roller 201 and a silicon block 2012, the electric crushing roller 201 rotates when the electric crushing roller 201 and the silicon block 2012 cooperate to work, meanwhile, the electric turntable 2010 rotates to drive a pushing connecting rod 2011 to move, the pushing connecting rod 2012 to drive the silicon block 2012 to slide, so that the silicon blocks intermittently approach and are far away from the electric crushing roller 201, when the silicon blocks are close to the electric crushing roller 201, the silicon blocks between the silicon blocks are crushed, the silicon blocks are prevented from being stacked on a crushing particle screening plate 200, the silicon blocks are prevented from being crushed to be stacked on the silicon particle screening plate 200 when the silicon blocks are crushed to have the diameter smaller than the diameter of a mesh opening 200, and the silicon block 200 is not actually crushed, and the silicon blocks are prevented from falling down to the diameter 200 to the hole plate 200 is not to be reciprocally and the diameter of the mesh plate 200 is not to be crushed, and the diameter of the silicon blocks is not to be crushed to be in the mesh plate to be crushed, and the size is not to be crushed to be in the size of a mesh plate is not to be crushed, and the size;
the crushed silicon blocks drop onto the grinding roller 2016, the grinding belt wheel 2013 is driven to rotate along with the rotation of the electric sector gear 2007, the grinding belt wheel 2013 is driven to rotate to drive the first driving belt 2017 to drive the middle belt wheel 2018 to rotate, the middle belt wheel 2018 rotates to drive the leftmost grinding rotating shaft 2014 to rotate, the leftmost grinding rotating shaft 2014 rotates to drive the execution grinding belt wheel 2015 on the middle belt wheel 2018 to rotate, the execution grinding belt wheel 2015 rotates to drive the second driving belt 2019, the second driving belt 2019 rotates to drive the rest execution grinding belt wheels 2015 to rotate, the corresponding grinding rotating shaft 2014 is driven to rotate, the grinding rotating shaft 2014 rotates to drive the grinding roller 2016 to rotate, the crushed silicon blocks falling on the grinding roller 2016 are rolled into smaller crushed silicon blocks under the action of the grinding roller 2016 and then fall into the silicon block ball mill 2020, at this time, the silicon block feeding electric gate 2021 is in an open state, the silicon block feeding electric gate 2021 is closed after the silicon block feeding is finished, then the silicon block ball mill 2020 performs ball milling on the silicon block feeding electric gate, the steel ball and the silicon block in the driving period rotate together during the rotation of the silicon block ball mill 2020 during ball milling, the steel ball is tightly attached to the silicon block due to the rotation of the silicon block ball mill 2020, meanwhile, the steel ball is heavy and falls onto the silicon block when the steel ball is at the highest point, the silicon block is finally milled into powder to form silicon powder through mutual extrusion and collision of the steel ball and the silicon block, when the diameter particle of the silicon powder is smaller than the 2000 mesh of the ball milling diameter particle screening net, the silicon powder falls to the bottom surface of the shell 2002 of the crushing ball milling mechanism from the 2000 mesh of the ball milling diameter particle screening net, and falls into the auger 6 under the action of an inclined plane.
Example 3
On the basis of embodiment 1, the material conveying auger 6 comprises an auger shell 600, an auger main body 6000 is rotationally connected to the auger shell 600, a first guide rod 6001 is fixedly connected to the inside of the outlet end of the auger shell 600, a first conical plug 6002 is connected to the first guide rod 6001 in a vertical sliding mode, a T-shaped feeding pipe body 6003 is connected to the reactor main body 3 in a vertical sliding mode, an L-shaped push rod 6004 is fixedly connected to the inner wall of the T-shaped feeding pipe body 6003, a first electromagnet 6005 is fixedly connected to the inner wall of the reactor main body 3, a second electromagnet 6006 is fixedly connected to the T-shaped feeding pipe body 6003, the first electromagnet 6005 is connected with the second electromagnet 6006 through a reset elastic piece 6007, a connecting rod 6008 is fixedly connected to the first electromagnet 6005, and one end of the connecting rod 6008, far away from the first electromagnet 6005, is fixedly connected with a second conical plug 6009.
The working principle and the beneficial effects of the technical scheme are as follows: during operation, auger main part 6000 rotates, drive the silica flour that falls into auger casing 600 upward movement and be extruded through auger casing 600 exit end, first electro-magnet 6005 before extruding and second electro-magnet 6006 are electric, thereby make T type inlet pipe body 6003 upwards move to stretching into auger casing 600 exit end inside under the effect of electromagnetic force, produce the clearance between this moment second toper jam 6009 and the T type inlet pipe body 6003, in the in-process L type push rod 6004 that T type inlet pipe body 6003 upwards moved promotes first toper jam 6002 along first guide arm 6001 upward movement and produce the clearance between the auger casing 600 inner wall, silica flour in the auger casing 600 falls into in T type inlet pipe body 6003 through the clearance between first toper jam 6002 and the auger casing 600 inner wall, again fall into reactor main part 3 through the clearance between second toper jam 6009 and the T type inlet pipe body 6003, after the feeding finishes, first electro-magnet 6006 loses electricity when feeding, T type inlet pipe 6003 reset under the effect of elastic component 6007, L type push rod 6004 promotes first toper jam 6002 and produces the clearance between the first toper body 6003 and the required inlet pipe body 3 and the second toper inlet pipe body 3 in the design clearance that the required time of sealing cover 3 can be satisfied simultaneously in the reactor main part 3, the sealed main part 3 is satisfied in the sealed main part 3 and the required clearance between the aspect of the second toper inlet pipe body 3 and the required time of sealing cover 3.
Example 4
On the basis of embodiment 1, be equipped with drive assembly in base 1, drive assembly is used for driving the work of silicon nitride powder piece ball-milling mechanism 4 and specification screening mechanism 5, drive reactor main part 3 rotates simultaneously, drive assembly includes linear electric motor 7, linear electric motor 7 fixed connection is in base 1, linear electric motor output fixedly connected with connecting plate 700, fixedly connected with driving motor 7000 on the connecting plate 700, be equipped with first output shaft 7001 and second output shaft 7002 on the motor 7000, first output shaft 7001 and second output shaft 7002 swivelling joint are in base 1, base 1 swivelling joint has first reducing pivot 7004, fixedly connected with first bevel gear 7003 and first rotary gear 7005 on the first reducing pivot 7004, base 1 swivelling joint has first pivot 7006, fixedly connected with second rotary gear 7007 and third rotary gear 7008 respectively at first pivot 7006 both ends, fixedly connected with first rotatory ring 7009 on the reactor main part 3, second rotary gear 7007 is used for intermeshing with first rotary gear 7008, first rotatory ring 7009 is used for intermeshing with third rotary gear 7008.
The technical scheme has the working principle and beneficial effects that: when the silicon nitride synthesis device works, the linear motor 7 drives the connecting plate 700 to move upwards, the connecting plate 700 moves upwards to drive the motor 7000 to move upwards, the motor 7000 moves upwards to drive the first output shaft 7001 to move upwards, so that the first output shaft 7001 stretches into the first reducing rotating shaft 7004 and is meshed with the first reducing rotating shaft 7004, at the moment, the first rotating gear 7005 is meshed with the second rotating gear 7007, the motor 7000 is started to drive the first output shaft 7001 to rotate, the first rotating gear 7005 is driven to rotate to drive the second rotating gear 7007 to rotate, the second rotating gear 7007 is driven to rotate to drive the first rotating shaft 7006 to rotate, the first rotating shaft 7006 is driven to rotate to drive the third rotating gear 7008 to rotate, the first rotating gear 7009 is driven to rotate to drive the reactor main body 3 to rotate, and therefore the silicon nitride synthesis reaction is accelerated.
Example 5
On the basis of embodiment 1, a second reducing rotating shaft 701 and a second rotating shaft 7011 are rotatably connected to the base 1, the second reducing rotating shaft 701 is used for being meshed with a second output shaft 7002, a second bevel gear 7010 is fixedly connected to the second reducing rotating shaft 701, a third bevel gear 7012 and a ball milling mechanism meshing gear 7013 are fixedly connected to the second rotating shaft 7011, a second rotary meshing toothed ring 7014 is fixedly connected to the silicon nitride block ball milling mechanism 4, and the ball milling mechanism meshing gear 7013 is meshed with the second rotary meshing toothed ring 7014.
Preferably, the silicon nitride block ball milling mechanism 4 is arranged right below the reactor main body 3, the silicon nitride block ball milling mechanism 4 comprises a silicon nitride block feeding electric flashboard 400 and a silicon nitride block ball milling mechanism cylinder 401, the silicon nitride block feeding electric flashboard 400 is slidably connected in the silicon nitride block ball milling mechanism cylinder 401, and a silicon nitride powder screen 402 is arranged at the outlet end of the silicon nitride block ball milling mechanism cylinder 401.
The working principle and the beneficial effects of the technical scheme are as follows: when the silicon nitride block ball mill works, the linear motor 7 drives the connecting plate 700 to move downwards, the connecting plate 700 moves downwards to drive the motor 7000 to move downwards, the motor 7000 moves downwards to drive the first output shaft 7001 to move downwards, so that the first output shaft 7001 stretches into the second reducing rotating shaft 701 and is meshed with the second reducing rotating shaft 701, then the motor 7000 rotates to drive the second rotating shaft 7011 to rotate, the second rotating shaft 7011 rotates to drive the second reducing rotating shaft 701 to rotate, the second reducing rotating shaft 701 rotates to drive the second bevel gear 7010 to rotate, the second bevel gear 7010 rotates to drive the third bevel gear 7012 to rotate, the third bevel gear 7012 rotates to drive the ball mill meshing gear 7013 to rotate, the ball mill meshing gear 7013 rotates to drive the second rotating meshing toothed ring 7014 to rotate, the second rotating meshing toothed ring 7014 rotates to drive the silicon nitride block ball mill mechanism cylinder 401 to rotate, and silicon nitride blocks are ground through steel balls in the silicon nitride block ball mill mechanism cylinder 401, and after the grinding degree of silicon nitride blocks in the silicon nitride block ball mill cylinder 401 is in place, the silicon nitride block is output from the silicon nitride block 402 to the screen mesh 5.
Example 6
On the basis of embodiment 5, the specification screening mechanism 5 comprises a specification screening mechanism shell 500, a powder stirring paddle 5000 is arranged in the specification screening mechanism shell 500, an outlet end of a silicon nitride powder block ball milling mechanism 4 is positioned in the specification screening mechanism shell 500, a first gear 5001 is fixedly connected to the powder stirring paddle 5000, a third rotating shaft 5002 is rotationally connected to the base 1, a second gear 5003 and a third gear 5004 are fixedly connected to the third rotating shaft 5002, a fourth gear 5005 is fixedly connected to the second reducing rotating shaft 701, the first gear 5001 is used for being meshed with the second gear 5003, the third gear 5004 is used for being meshed with the fourth gear 5005, a negative pressure cavity 5006 is arranged in the specification screening mechanism shell 500, a negative pressure channel 5007 is arranged on the negative pressure cavity 5006, a material blocking net 5008 is arranged at the negative pressure channel 5007, a negative pressure generating component is arranged at one end of the negative pressure channel 5007 far from the material blocking net 5008, and a powder outlet 5009 is arranged at the bottom of the negative pressure cavity 5006;
the negative pressure generating assembly comprises a fourth rotating shaft 501 and a fifth rotating shaft 5010, the fourth rotating shaft 501 and the fifth rotating shaft 5010 are rotationally connected in the base 1, the axes are mutually perpendicular, a fourth bevel gear 5011 and a fifth bevel gear 5012 are fixedly connected to the fourth rotating shaft 501, a sixth bevel gear 5013 and a negative pressure fan 5014 are fixedly connected to the fifth rotating shaft 5010, the fourth bevel gear 5011 is used for being meshed with the first bevel gear 7003, and the fifth bevel gear 5012 is used for being meshed with the sixth bevel gear 5013.
The working principle and the beneficial effects of the technical scheme are as follows: when the device works, the motor 7000 drives the first output shaft 7001 to rotate, the first output shaft 7001 drives the first reducing rotating shaft 7004 to rotate, the first reducing rotating shaft 7004 drives the first bevel gear 7003 to rotate, the first bevel gear 7003 drives the fourth bevel gear 5011 to rotate, the fourth bevel gear 5011 drives the fourth rotating shaft 501 to rotate, the fourth rotating shaft 501 drives the fifth bevel gear 5012 to rotate, the fifth bevel gear 5012 drives the sixth bevel gear 5013 to rotate and drives the fifth rotating shaft 5010 to rotate, so as to drive the negative pressure fan 5014 to rotate, the negative pressure fan 5014 rotates to reduce the air pressure in the negative pressure cavity 5006, silicon nitride powder in the specification screening mechanism shell 500 is pressed into the negative pressure cavity 5006 under the stirring and negative pressure of the powder stirring paddle 5000, silicon nitride powder cannot enter the negative pressure channel 5007 due to the action of the material blocking net 5008 and is gathered in the negative pressure cavity 5006, and after the rotation of the negative pressure fan 5014 stops, the silicon nitride powder falls into the powder outlet 5009 under the action of gravity, and can be collected only by placing the powder outlet 5009;
the negative pressure in the negative pressure cavity 5006 can be adjusted by adjusting the rotating speed of the negative pressure fan 5014, so that the effect of screening silicon nitride powder is achieved, namely, certain pressure can only press silicon nitride powder below certain diameter particles into the negative pressure cavity 5006, and the diameter particles of the silicon nitride powder can be screened by adjusting the pressure value.
It will be apparent to those skilled in the art that various modifications and variations can be made to the present invention without departing from the spirit or scope of the invention. Thus, it is intended that the present invention also include such modifications and alterations insofar as they come within the scope of the appended claims or the equivalents thereof.
Claims (10)
1. A reactor for synthesizing silicon nitride powder, characterized in that: the device comprises a base (1), wherein a silicon block smashing and ball milling mechanism (2), a reactor main body (3), a silicon nitride block ball milling mechanism (4) and a specification screening mechanism (5) are arranged on the base (1), the outlet end of the silicon block smashing and ball milling mechanism (2) is communicated with the inlet end of a conveying auger (6), the outlet end of the conveying auger (6) is communicated with the inlet end of the reactor main body (3), the outlet end of the reactor main body (3) is communicated with the inlet end of the silicon nitride block ball milling mechanism (4), and the outlet end of the silicon nitride block ball milling mechanism (4) is communicated with the inlet end of the specification screening mechanism (5);
the silicon block crushing and ball milling mechanism (2) is internally provided with a crushing diameter particle screening plate (200) and a ball milling diameter particle screening net (2000).
2. A reactor for synthesizing silicon nitride powder according to claim 1, wherein: the silicon block crushing ball milling mechanism (2) comprises an anti-blocking cylinder (2001), the anti-blocking cylinder (2001) is fixedly connected to a crushing ball milling mechanism shell (2002) of the silicon block crushing ball milling mechanism (2), a silicon block feeding funnel (2003) is fixedly connected to the anti-blocking cylinder (2001), an anti-blocking material separating roller (2004) is rotationally connected to the anti-blocking cylinder (2001), a crushing diameter particle screening plate (200) is horizontally and slidably connected to the crushing ball milling mechanism shell (2002), the crushing diameter particle screening plate (200) divides the inside of the crushing ball milling mechanism shell (2002) into a crushing cavity (2005) and a ball milling cavity (2006), a crushing component is arranged in the crushing cavity (2005), a ball milling component is arranged in the ball milling cavity (2006), electric sector teeth (2007) are rotationally connected to the crushing ball milling mechanism shell (2002), and the electric sector teeth (2007) are used for being meshed with the crushing diameter particle screening plate (200).
3. A reactor for synthesizing silicon nitride powder according to claim 2, wherein:
the anti-blocking material distributing roller (2004) comprises an electric material distributing roller rotating shaft (2008) and a plurality of material distributing blades (2009) fixedly connected to the electric material distributing roller rotating shaft (2008), wherein the cross section of each material distributing blade (2009) is V-shaped.
4. A reactor for synthesizing silicon nitride powder according to claim 2, wherein: the crushing assembly comprises an electric crushing roller (201), the electric crushing roller (201) is rotationally connected in a crushing cavity (2005), two sides of the crushing cavity (2005) are rotationally connected with two symmetrically arranged electric turntables (2010), a pushing connecting rod (2011) is hinged to the electric turntables (2010), one end of the pushing connecting rod (2011) away from the electric turntables (2010) is hinged to a cutting block (2012), the cutting block (2012) is slidingly connected in a crushing ball milling mechanism shell (2002), and the cutting block (2012) is used for being matched with the electric crushing roller (201).
5. A reactor for synthesizing silicon nitride powder according to claim 2, wherein: the ball milling assembly comprises a driving rolling belt wheel (2013) and a plurality of rolling rotating shafts (2014) which are uniformly and rotatably connected in a ball milling cavity (2006), the driving rolling belt wheel (2013) is coaxial with electric sector teeth (2007), the rolling rotating shafts (2014) are fixedly connected with a rolling belt wheel (2015) and rolling rollers (2016), the rolling rotating shafts (2014) at the leftmost side are fixedly connected with middle belt wheels (2018), the middle belt wheels (2018) are connected with the driving rolling belt wheel (2013) through first transmission belts (2017), the plurality of rolling belt wheels (2015) are connected through second transmission belts (2019), guide plates (202) which are symmetrically arranged are arranged on the inner walls of the ball milling cavity (2006) and below the rolling rollers (2016), silicon block ball mills (2020) are rotatably connected to the lower sides of the guide plates (202), ball milling diameter screening nets (2000) are arranged on the silicon block ball mills (2020), and the bottom surfaces of the grinding mechanism shells (2002) are inclined planes.
6. A reactor for synthesizing silicon nitride powder according to claim 1, wherein: the material conveying auger (6) comprises an auger shell (600), an auger body (6000) is rotationally connected to the auger shell (600), a first guide rod (6001) is fixedly connected to the inside of an outlet end of the auger shell (600), a first conical plug (6002) is connected to the first guide rod (6001) in a vertical sliding mode, a T-shaped feeding pipe body (6003) is connected to the upper portion and the lower portion of the reactor body (3) in a sliding mode, an L-shaped push rod (6004) is fixedly connected to the inner wall of the T-shaped feeding pipe body (6003), a first electromagnet (6005) is fixedly connected to the inner wall of the reactor body (3), a second electromagnet (6006) is fixedly connected to the T-shaped feeding pipe body (6003), the first electromagnet (6005) is connected to the second electromagnet (6006) through a reset elastic piece (6007), a connecting rod piece (6008) is fixedly connected to the first electromagnet (6005), and one end of the connecting rod (6008) is far away from the first electromagnet (6005) is fixedly connected to a second conical plug (6009).
7. A reactor for synthesizing silicon nitride powder according to claim 1, wherein: a driving component is arranged in the base (1), the driving component is used for driving the silicon nitride powder ball milling mechanism (4) and the specification screening mechanism (5) to work, meanwhile, the driving component drives the reactor main body (3) to rotate, the driving component comprises a linear motor (7), the linear motor (7) is fixedly connected with a connecting plate (700) at the output end of the linear motor, a driving motor (7000) is fixedly connected with the connecting plate (700), a first output shaft (7001) and a second output shaft (7002) are arranged on the motor (7000), the first output shaft (7001) and the second output shaft (7002) are rotationally connected in the base (1), the first diameter-changing rotating shaft (7004) is rotationally connected with a first diameter-changing rotating shaft (7004) and is meshed with the first output shaft (7001), a first bevel gear (7003) and a first rotating gear (7006) are rotationally connected with the first rotating shaft (7006) at two ends of the base (1), a second rotating gear (7001) and a third rotating gear (7008) are rotationally connected with the first bevel gear (7007) and the first rotating ring (7009) respectively, the first rotary toothed ring (7009) is used for meshing with a third rotary gear (7008).
8. A reactor for synthesizing silicon nitride powder according to claim 1, wherein: a stirring paddle (8) is arranged in the reactor main body (3).
9. A reactor for synthesizing silicon nitride powder as set forth in claim 7, wherein: the base (1) is rotationally connected with a second reducing rotating shaft (701) and a second rotating shaft (7011), the second reducing rotating shaft (701) is used for being meshed with a second output shaft (7002), a second bevel gear (7010) is fixedly connected to the second reducing rotating shaft (701), a third bevel gear (7012) and a ball milling mechanism meshing gear (7013) are fixedly connected to the second rotating shaft (7011), a second rotary meshing toothed ring (7014) is fixedly connected to a silicon nitride block ball milling mechanism barrel (401) of the silicon nitride block ball milling mechanism (4), and the ball milling mechanism meshing gear (7013) is meshed with the second rotary meshing toothed ring (7014).
10. A reactor for synthesizing silicon nitride powder according to claim 9, wherein: the specification screening mechanism (5) comprises a specification screening mechanism shell (500), a powder stirring paddle (5000) is arranged in the specification screening mechanism shell (500), the outlet end of the silicon nitride powder ball milling mechanism (4) is positioned in the specification screening mechanism shell (500), a first gear (5001) is fixedly connected to the powder stirring paddle (5000), a third rotating shaft (5002) is rotationally connected to the base (1), a second gear (5003) and a third gear (5004) are fixedly connected to the third rotating shaft (5002), a fourth gear (5005) is fixedly connected to the second diameter-variable rotating shaft (701), the first gear (5001) is used for being meshed with the second gear (5003), the third gear (5004) is used for being meshed with the fourth gear (5005), a negative pressure cavity (5006) is arranged in the specification screening mechanism shell (500), a negative pressure channel (5007) is arranged on the negative pressure cavity, a material blocking net (5008) is arranged at the position of the negative pressure channel (5007), one end, far away from the negative pressure net (5008), of the negative pressure channel (5007) is provided with a negative pressure cavity (5009) and the powder outlet (5009) is formed.
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN117486617A (en) * | 2023-10-07 | 2024-02-02 | 衡阳凯新特种材料科技有限公司 | Preparation method and device of porous silicon nitride ceramic |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN117486617A (en) * | 2023-10-07 | 2024-02-02 | 衡阳凯新特种材料科技有限公司 | Preparation method and device of porous silicon nitride ceramic |
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