CN109647585A - Subparticle based on cavitation jet coupling collision impact prepares ball milling experimental rig - Google Patents
Subparticle based on cavitation jet coupling collision impact prepares ball milling experimental rig Download PDFInfo
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- CN109647585A CN109647585A CN201811453903.XA CN201811453903A CN109647585A CN 109647585 A CN109647585 A CN 109647585A CN 201811453903 A CN201811453903 A CN 201811453903A CN 109647585 A CN109647585 A CN 109647585A
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- cylinder
- subparticle
- pipe
- cavitation jet
- overflow
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Classifications
-
- 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
- B02C17/185—Discharging devices combined with sorting or separating of material with more than one separator
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B02—CRUSHING, PULVERISING, OR DISINTEGRATING; PREPARATORY TREATMENT OF GRAIN FOR MILLING
- B02C—CRUSHING, PULVERISING, OR DISINTEGRATING IN GENERAL; MILLING GRAIN
- B02C19/00—Other disintegrating devices or methods
- B02C19/06—Jet mills
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- Engineering & Computer Science (AREA)
- Food Science & Technology (AREA)
- Disintegrating Or Milling (AREA)
- Crushing And Grinding (AREA)
Abstract
It is a kind of based on cavitation jet coupling collision impact subparticle prepare ball milling experimental rig, including test ball mill system, cavitation jet system and overflow separation system, cavitation jet system includes cavitating nozzle, high-voltage tube, pressure duct, water tank and transh pump, cavitating nozzle is fixedly connected with high-voltage tube, high-voltage tube is located at cylinder lumen, high-voltage tube passes through cylinder and is seal-installed on pressure duct one end, and transh pump is connect with water tank with the pressure duct other end；Overflow separation system includes overflow pipe, screen pipe, screen casing and particle collecting bin, screen pipe is located at cylinder lumen, screen pipe passes through cylinder and one end of overflow pipe is tightly connected, and the other end of overflow pipe is located above particle collecting bin, is connected between particle collecting bin and water tank by screen casing.The percussion of cavitation jet is coupled in the fine powder preparation of ball mill by the present invention, reduces particle " reunion ", improves the subparticle yield of device, has the advantages that product granularity is controllable, structure is simple, can continuous production.
Description
Technical field
The present invention relates to subparticle preparation field more particularly to it is a kind of based on cavitation jet coupling collision impact it is fine
Particle preparation ball milling experimental rig.
Background technique
In modern industry field, subparticle material is wide because different from the physics of normality, chemistry and surface and interfacial property
General and composite material, novel advanced ceramics, electromagnetic material etc..However subparticle high surface activity and unstable, it is easy to happen
Reunite, is the problem that mechanization prepares subparticle.And gas phase or liquid phase medium is utilized to generate subparticle powder, increase particle
Spacing is alleviated subparticle " reunion ", and it is that research is fine that playing mechanical shear stress and air-flow or liquid stream effect, which refines particle,
The Important Thought of granular materials preparation.Research shows that: superfine or superfine powder, but indifferent gas are obtained using air-flow crushing particle
Body Preparation equipment is huge, at high cost.And water is as cost-effective medium, the problem of can alleviating subparticle " reunion ", but
The effect and fineness that wet ball-milling crushes are not ideal enough, can not show a candle to air-flow crushing.
Summary of the invention
In order to overcome conventional bead mill there are the grinding limit, the problems such as subparticle crushing effect difference and particle " reunion ",
The present invention provide a kind of subparticle yield is high, particle " reunions " less, granularity is controllable, structure is simple, energy quantity-produced cavitation
The subparticle of jet stream coupling collision impact prepares ball milling experimental rig.
The technical solution adopted by the present invention to solve the technical problems is:
It is a kind of based on cavitation jet coupling collision impact subparticle prepare ball milling experimental rig, including test ball mill
System, the test ball mill system include pedestal, cylinder, shaft, bearing block and driving mechanism, the both ends difference of the cylinder
It is fixed in shaft, the shaft is mounted in bearing block, and the bearing block is fixed on pedestal two sides, wherein a shaft and use
In the driving mechanism connection for driving shaft rotation, it is characterised in that: described device further includes cavitation jet system and overflow separation
System, the cavitation jet system include cavitating nozzle, high-voltage tube, pressure duct, water tank and transh pump, the cavitating nozzle with
High-voltage tube is fixedly connected, and the high-voltage tube is located at cylinder lumen, and the high-voltage tube passes through cylinder and is seal-installed on pressure duct one
End, the transh pump are connect with water tank with the pressure duct other end；
The overflow separation system includes overflow pipe, screen pipe, screen casing and particle collecting bin, and the screen pipe is located at cylinder
Inner cavity, the screen pipe passes through cylinder and one end of overflow pipe is tightly connected, and the other end of the overflow pipe is located at particle receipts
Above header, it is connected between the particle collecting bin and water tank by screen casing.
Further, jet vectoring valve, flowmeter and pressure gauge are set on the pressure duct.
Further, the cylinder top is equipped with feed inlet, and the shaft passes through the output shaft of shaft coupling and driving motor
Connection.
Further, overflow control valve is set on the overflow pipe.
The screen pipe is provided with long hole, and the sieve between 200~400 mesh, the overflow are equipped at long hole
Pipe is connected to cylinder；The screen casing is porous metal ceramic tube.
The screen pipe uses stainless steel material, and set on high-voltage tube and by being welded and fixed, stretch by screen pipe one end
Into cylinder, the other end stretches out outside cylinder, and the outlet of the outer one end of cylinder is connected through a screw thread overflow pipe, using rotation between screen pipe and end cap
Turn sealing.
The cavitating nozzle uses self-excited oscillating type cavitating nozzle.As preferred: the cavitating nozzle uses self-excitation
Oscillation mode accordion type spray nozzle, cavitation effect is more preferably.
Technical concept of the invention are as follows: cavitation microjet can form erosion effect to material, can be near wall cavitation bubble
One-shot when crumbling and fall destroys, and the bump effect for being also possible to vacuole group causes material fatigue rupture.It is deposited inside material
In micro-crack, the high-speed micro-jet that cavitation bubble is generated when crumbling and fall can cause micro-crack to expand, it could even be possible to by material particles
It blows；Also the movement that can accelerate particle, make particle have very high initial velocity, thus between causing particle, particle and mill be situated between with
And severe friction and collision between barrel, and then brittle particle is caused to crush.Conventional cavitation process mainly has ultrasonic cavitation
And Hydrodynamic cavitation, compared with ultrasonic cavitation, Hydrodynamic cavitation is more efficient and is easier to realize.
Hydrodynamic cavitation is often referred to fluid and flows through a cavitation generator (such as Venturi tube, orifice plate or cavitating nozzle)
When, transient liquid is compressed, when pressure be down to saturated vapor pressure and it is following when, " the gas core " for dissolving in a fluid can occur swollen
It is swollen, a large amount of cavitation bubble can be generated in fluid, cavitation bubble is during expanding flowing, with the increase of ambient pressure, volume
Sharply it will reduce or even crumble and fall again, and generate the cavitation microjet of high speed and high pressure.
The collision impact between Jie, particle and barrel, the cavitation that coupling cavitating nozzle releases are ground using ball mill itself
Bubble, the reasonable cavitation impact controlled in gas-liquid-solid three-phase particle stream increase the kinetic energy of particle, improve mutual between particle
Wall surface percussion between collision effect and particle and mill Jie, active force and particle and cylinder of the optimization cavitation impact to particle
Wall effect between body, mill Jie promotes the effective broken of subparticle.
Beneficial effects of the present invention are mainly manifested in:
1) Jie's collision impact is ground under a kind of liquid phase environment provided by the invention impact the subparticle coupled with cavitation jet
Ball milling experimental rig is prepared, while solving subparticle " reunion " problem, is advantageously implemented the local high energy of subparticle
Impact grinding is that a kind of subparticle of opposite low power consuming high yield prepares new equipment.
2) present invention solves the problems, such as that conventional bead mill powder is prepared there are the grinding limit, further to refine powder grain
Diameter, while the high energy cavitation jet under liquid phase environment is coupled, the percentage of damage of powder is improved, reduces preparation under partial size yield
Production cost.
3) present invention realizes the adjusting to cavitating nozzle inlet pressure and flow using control valve, pressure gauge and flowmeter,
To effectively control the intensity of bubble collapse, its corresponding running parameter is adjusted to grind materials according to different, to improve yield.
4) present invention is equipped with overflow separation system, can isolate the subparticle in required particle size range and collection, should
System is connected to transh pump, energy continuous production, while the water in device can recycle.
Detailed description of the invention
Fig. 1 is schematic diagram of the invention；
Fig. 2 is the schematic diagram of cavitating nozzle installation site；
Fig. 3 is the structural schematic diagram of cavitating nozzle；
Fig. 4 is the assembling schematic diagram of high-pressure water inlet, overflow exit；
Fig. 5 is the structural schematic diagram of screen pipe；
Fig. 6 is the scheme of installation of screen pipe and high-voltage tube.
In figure, 1, overflow pipe, 2, jet vectoring valve, 3, transh pump, 4, overflow control valve, 5, flowmeter, 6, pressure gauge, 7,
Bearing block, 8, screen pipe, 9, cavitating nozzle, 10, high-voltage tube, 11, mill Jie, 12, feed inlet, 13, cylinder, 14, end cap, 15, connection
Axis device, 16, retarder, 17, motor, 18, pedestal, 19, shaft, 20, water tank, 21, pressure duct, 22, screen casing, 23, particle receipts
Header.
Specific embodiment
The invention will be further described below in conjunction with the accompanying drawings.
Referring to Fig.1~Fig. 6, it is a kind of based on cavitation jet coupling collision impact subparticle prepare ball milling experimental rig,
Including test ball mill system, the test ball mill system includes pedestal 18, cylinder 13, shaft 19, bearing block 7 and driving machine
The both ends of structure, the cylinder 13 are separately fixed in shaft 19, and the shaft 19 is mounted in bearing block 7, and the bearing block 7 is solid
18 two sides of pedestal are scheduled on, wherein a shaft is connect with the driving mechanism for driving shaft to rotate, described device further includes sky
Change fluidic system and overflow separation system, the cavitation jet system include cavitating nozzle 9, high-voltage tube 10, pressure duct 21, water
Case 20 and transh pump 3, the cavitating nozzle 9 are fixedly connected with high-voltage tube 10, and the high-voltage tube 10 is located at 13 inner cavity of cylinder, described
High-voltage tube 10 passes through cylinder and is seal-installed on 21 one end of pressure duct, the transh pump 3 and water tank 20 and pressure duct 21 separately
One end connection；
The overflow separation system includes overflow pipe 1, screen pipe 8, screen casing 22 and particle collecting bin 23, the screen pipe 8
Positioned at 13 inner cavity of cylinder, one end that the screen pipe 8 passes through cylinder 13 and overflow pipe 1 is tightly connected, the overflow pipe 1 it is another
One end is located at 23 top of particle collecting bin, is connected between the particle collecting bin 23 and water tank 20 by screen casing 22.
Jet vectoring valve 2, flowmeter 5 and pressure gauge 6 are set on the pressure duct 21.
13 top of cylinder is equipped with feed inlet 12, and the shaft 19 is connected by the output shaft of shaft coupling 15 and retarder 16
It connects, the input shaft of retarder 16 and the input axis connection of driving motor 17.
Overflow control valve 4 is set on the overflow pipe 1.
The cavitation jet that the cavitation jet system generates will be situated between with mill in grinding machine, particle realizes efficient coupling, cavitation
Jet parameters need the shock resistance breakage properties, grain diameter, mill Jie's feature of comprehensive particle to determine.By controlling cavitation jet
The pressure and flow of system improve nozzle arrangements and size, cavitation jet intensity adjustment may be implemented.The cavitation bubble wink of near wall
Between crumble and fall to form the microjet of high speed and high pressure, sweep along subparticle in liquid phase impact near to form wall surface broken on mill Jie surface
Effect forms effective cavitation microjet region between it is situated between mill, and subparticle to be ground, cavitation bubble are formed in the area
" gas-liquid-solid three-phase high-energy particle stream ", high-energy particle stream impact grinding are situated between, and cause the broken of subparticle.
The overflow separation system is for slurries overflow and the separation of subparticle and collection.The screen pipe 8
It is provided with long hole, and the sieve between 200~400 mesh is installed at long hole, to prevent bulky grain from passing through.The overflow pipe 1
Be connected to cylinder 13, internal flow can mutually flow, using siphon principle, filtering of the intracorporal slurries of cylinder through screen pipe 8 it
It endlessly overflows afterwards.The screen casing 22 is porous metal ceramic tube, and can shut off fine of the small solid to 1-3um
Grain, under differential pressure action, the subparticle being trapped is remained in particle collecting bin 23.
The test ball mill system drives grinding mill barrel 13 to rotate by motor 17 and its transmission device, 13 band of cylinder
It is dynamic to grind 11 movement of Jie, for the movement of adjusting mill Jie 11, the revolving speed of cylinder 13 is controlled with frequency control way.
The cavitating nozzle 9 uses self-excited oscillating type cavitating nozzle, according to 13 size of cylinder, high-pressure water pressure and flow
Etc. parameter designings jet size and select quantity.The transh pump 3 is of less demanding to cleaning liquid degree, even if being mixed in liquid
Part subparticle, transh pump 3 remain to operate normally.Liquid phase water circulation use is realized by overflow separation system and transh pump 3,
Can granularity needed for continuous production subparticle, liquid phase water consumption can be effectively reduced.
The grain diameter of pan feeding is in 280~75um (65~200 mesh) range.
The cavitating nozzle 9 is connected through a screw thread with high-voltage tube 10, and high-voltage tube 10 is seal-installed on pressure duct 21 1
End, the transh pump 3 are connect with water tank 20 by pressure duct 21, and the water repressurization aspirated in water tank 20 injects high-voltage tube
In road 21 and high-voltage tube 10, and pass through the pressure and flow in 6 control piper of jet vectoring valve 2, flowmeter 5 and pressure gauge.
Due to the depression that the presence of gas core in water and nozzle interior generate, a large amount of cavitation bubble is generated in nozzle exit, it is empty
With high-pressure jet, directive grinds Jie 11 together for bubble, and cavitation bubble moment crumbles and fall to form the microjet of high speed and high pressure, carries in liquid phase
11 surfaces of mill Jie near subparticle impact form wall surface and are crushed effect；Wet ball mill main body utilizes retarder 16 and motor
17 transmissions, realize the controllable circular motion of revolving speed, and grinding charge material and mill Jie 11 leave or rushed down in cylinder 13 and fall movement, collides
Impact the volume crushing that large granular materials can be achieved；The screen pipe 8 is connect with overflow pipe 1 by thread seal, by overflowing
Flow in 4 control piper of flow control valve, the overflow pipe 1 are installed on 23 top of particle collecting bin, the powder collection
Screen casing 22 is installed between case 23 and water tank 20, when the partial size of subparticle is less than the mesh of 8 upper screen cloth of screen pipe, fine
Grain just overflows together with water, and precipitates in particle collecting bin 23, and suspension is filtered under differential pressure action by screen casing 22, fine
Particle remains in collecting box 23, and water flows into water tank 20 and recycles, and whole process realizes continuous production.
The movement under different rotating speeds of different ratio mill Jie 11 as shown in Figure 2 forms height, mill Jie's grain bed not of uniform size,
It can be according to the angle and outreach of form the arrangement cavitating nozzle 9 and vertical plane of mill Jie's grain bed.As shown in figure 3, described
Cavitating nozzle 9 devises entrance mixing chamber on the basis of self-excited oscillating type accordion type spray nozzle, is found by simulation and analysis of flow field,
This structure facilitates the slurries sucked in environment, can then drive more particles hit mill Jie 11, improve crushing efficiency.
As shown in Fig. 4~Fig. 6, the screen pipe 8 uses stainless steel material, and set is on high-voltage tube 10 and passes through welding
Fixed, 8 one end of screen pipe is stretched to the other end in cylinder and is stretched out outside cylinder, and the outlet of the outer one end of cylinder is connected through a screw thread overflow pipe 1, filters
Rotatory sealing is used between pipe 8 and end cap 14.
Content described in this specification embodiment is only enumerating to the way of realization of inventive concept, protection of the invention
The concrete form for being not construed as being only limitted to embodiment statement of range, protection scope of the present invention is also and in art technology
Personnel conceive according to the present invention it is conceivable that equivalent technologies mean.
Claims (7)
1. a kind of subparticle based on cavitation jet coupling collision impact prepares ball milling experimental rig, including test ball mill system
System, the test ball mill system include pedestal, cylinder, shaft, bearing block and driving mechanism, and the both ends of the cylinder are solid respectively
Be scheduled in shaft, the shaft is mounted in bearing block, and the bearing block is fixed on pedestal two sides, wherein a shaft be used for
Drive the driving mechanism connection of shaft rotation, it is characterised in that: described device further includes cavitation jet system and overflow segregative line
System, the cavitation jet system include cavitating nozzle, high-voltage tube, pressure duct, water tank and transh pump, the cavitating nozzle and high
Pressure pipe is fixedly connected, and the high-voltage tube is located at cylinder lumen, and the high-voltage tube passes through cylinder and is seal-installed on pressure duct one end,
The transh pump is connect with water tank with the pressure duct other end；
The overflow separation system includes overflow pipe, screen pipe, screen casing and particle collecting bin, and the screen pipe is located in cylinder
Chamber, the screen pipe passes through cylinder and one end of overflow pipe is tightly connected, and the other end of the overflow pipe is located at powder collection
Above case, it is connected between the particle collecting bin and water tank by screen casing.
2. the subparticle as described in claim 1 based on cavitation jet coupling collision impact prepares ball milling experimental rig,
It is characterized in that: jet vectoring valve, flowmeter and pressure gauge is set on the pressure duct.
3. the subparticle as described in claim 1 based on cavitation jet coupling collision impact prepares ball milling experimental rig,
Be characterized in that: the cylinder top is equipped with feed inlet, and the shaft passes through the output axis connection of shaft coupling and driving motor.
4. the subparticle as described in claim 1 based on cavitation jet coupling collision impact prepares ball milling experimental rig,
It is characterized in that: overflow control valve is set on the overflow pipe.
5. the subparticle as described in claim 1 based on cavitation jet coupling collision impact prepares ball milling experimental rig,
Be characterized in that: the screen pipe is provided with long hole, and the sieve between 200~400 mesh, the overflow are equipped at long hole
Pipe is connected to cylinder；The screen casing is porous metal ceramic tube.
6. the subparticle as described in claim 1 based on cavitation jet coupling collision impact prepares ball milling experimental rig,
Be characterized in that: the screen pipe uses stainless steel material, and set on high-voltage tube and by being welded and fixed, stretch by screen pipe one end
Into cylinder, the other end stretches out outside cylinder, and the outlet of the outer one end of cylinder is connected through a screw thread overflow pipe, using rotation between screen pipe and end cap
Turn sealing.
7. the subparticle as described in claim 1 based on cavitation jet coupling collision impact prepares ball milling experimental rig,
Be characterized in that: the cavitating nozzle uses self-excited oscillating type cavitating nozzle.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811453903.XA CN109647585B (en) | 2018-11-30 | 2018-11-30 | Fine particle preparation ball-milling test device based on cavitation jet coupling collision impact |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811453903.XA CN109647585B (en) | 2018-11-30 | 2018-11-30 | Fine particle preparation ball-milling test device based on cavitation jet coupling collision impact |
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| Publication Number | Publication Date |
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| CN109647585A true CN109647585A (en) | 2019-04-19 |
| CN109647585B CN109647585B (en) | 2020-08-04 |
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| CN201811453903.XA Active CN109647585B (en) | 2018-11-30 | 2018-11-30 | Fine particle preparation ball-milling test device based on cavitation jet coupling collision impact |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110777250A (en) * | 2019-11-12 | 2020-02-11 | 徐州工程学院 | Underwater particle vacuole coupled material strengthening device and method |
| CN111366505A (en) * | 2020-02-10 | 2020-07-03 | 浙江工业大学 | Particle size follow-up detection device adopting cavitation impact crushing coupled fine particle dispersion laser scattering method |
| CN111468258A (en) * | 2020-04-17 | 2020-07-31 | 西安交通大学 | Simple device and method for physically separating coal slime of power coal plant |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN111366505A (en) * | 2020-02-10 | 2020-07-03 | 浙江工业大学 | Particle size follow-up detection device adopting cavitation impact crushing coupled fine particle dispersion laser scattering method |
| CN111468258A (en) * | 2020-04-17 | 2020-07-31 | 西安交通大学 | Simple device and method for physically separating coal slime of power coal plant |
| CN111468258B (en) * | 2020-04-17 | 2021-08-13 | 西安交通大学 | Simple device and method for physically separating coal slime of power coal plant |
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| CN109647585B (en) | 2020-08-04 |
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