CN105013588A - Ultrafine particle classification device - Google Patents
Ultrafine particle classification device Download PDFInfo
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- CN105013588A CN105013588A CN201510482688.6A CN201510482688A CN105013588A CN 105013588 A CN105013588 A CN 105013588A CN 201510482688 A CN201510482688 A CN 201510482688A CN 105013588 A CN105013588 A CN 105013588A
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Abstract
The invention provides an ultrafine particle classification device. A centrifugal force field of gas-solid two-phase flow of the classification device is evenly distributed, the classification device is stable in transmission, large in rigidity, small in energy consumption and capable of guaranteeing that the yield is improved, materials cannot flow out through a gap and the sealing performance of the materials in the whole device is ensured, the structure is convenient to overhaul, and work efficiency is guaranteed. The ultrafine particle classification device comprises an upper drive shell and a lower work cavity. The upper drive shell is connected with the lower work cavity through a turnover hinge structure. A lower end cover of the upper drive shell is arranged on the upper end face of the lower work cavity. The lower work cavity is provided with feeding ports and a gas inlet. The bottom of the lower work cavity is a coarse powder discharging port. A combination region formed between the lower work cavity and the upper drive shell is a classification region. The upper portion of the lower work cavity is provided with a tangent fine material discharging port. An outlet of the classification region is communicated with the tangent fine material discharging port. A classification wheel is arranged in the upper drive shell. An input shaft of the classification wheel penetrates the center position of an air seal disc and then is externally connected with a power device.
Description
Technical field
The present invention relates to the technical field of stock grading, be specially ultra-fine grain grading plant.
Background technology
Airslide disintegrating mill, it is a kind of Dry powder manufacturing installation, the powder being ground into below certain particle size with other breaking methods is added to pulverizing chamber, convergent divergent nozzle is used (preferably to use inert gas with ultrasonic speed-altitude gas jet here, as helium, also use nitrogen, also use air when the material be oxidized can not be there is.In this manual these gas is referred to as " air ") thus cause intergranular mutual shock, be ground into thinner powder.
Crushing chamber to airslide disintegrating mill as above indoor with supersonic velocity air time, a part of powder particle mixes for more short grained powder particle with pulverizing with the state fully pulverized.Thus, common airslide disintegrating mill possesses and is only selected by the powder particle being crushed to below certain particle diameter and the grader of externally discharging.Usually; grader is by the general designation of character with the device of the material classification varied in size; but in airslide disintegrating mill, use the object of grader to be, in the powder that the particle of various particle diameter mixes, filter out the powder particle being less than certain particle diameter make it pass through.That is, use grader, it is arranged on utilization the centrifugal force that multiple blades of the centrifugal rotor of grader occur and prevents from being greater than the method in the large powder inflow grader of certain particle diameter, only filters out the powder particle being less than a certain size and makes it pass through.
Airslide disintegrating mill is for the manufacture of the device of the superfines of several microns of sizes, the powder particle filtering out and pulverize very thin to be possessed and the grader of discharging in chamber, and in order to improve the accuracy of classification, the scheme for preventing unassorted particle from flowing into the gap between the centrifugal rotor of rotary body and grader and the body inner face of fixed part and grader also to be worked out.But as mentioned above, possessing the airslide disintegrating mill of centrifugal classifying disclosed in existing, enter preventing non-graded particie on the gap between grader body inner face or Shortcomings, or structure is too complicated, there is the problem not easily manufactured.Therefore, need to work out a kind of can prevent unassorted particle from flowing into airslide disintegrating mill centrifugal rotor and body inner face between the suitable scheme in gap.
Existing airslide disintegrating mill is horizontal type structure, and its floor space is large, and in real work, the graded region of airslide disintegrating mill easily produces the situation of putty, needs regularly to open to carry out overhauling or cleaning, and horizontal type structure is inconvenient operation when overhauling.
Summary of the invention
For the problems referred to above, the invention provides ultra-fine grain grading plant, its land occupation area is little, the centrifugal force field of gas-solid biphase flow is evenly distributed, and guarantees that material can not flow out from gap, ensures the sealing of material in whole equipment, and whole grading plant Vertical dimension transmission kinetic energy, stable transmission, rigidity are large, energy consumption reduces, output is promoted, and this structural inspection is convenient, guarantees operating efficiency.
Ultra-fine grain grading plant, it is characterized in that: it comprises top drive shell, bottom working cavity, described top drive shell is by bottom working cavity described in turnover hinge anatomical connectivity, the bottom end cover of described top drive shell is loaded on the upper surface of described bottom working cavity, described bottom working cavity is furnished with charging aperture, gas access, the bottom of described bottom working cavity is oversize outlet, described bottom working cavity, the combination zone formed between the drive shell of top is graded region, the top of described bottom working cavity is furnished with tangential meticulous discharging opening, tangential meticulous discharging opening described in the outlet of described graded region, grading wheel is equipped with in the inside of described top drive shell, the power shaft of described grading wheel runs through external connection power device behind the center of air sealing disc, the center of described air sealing disc has passed into compressed air by internal duct, the lower end of described grading wheel is supported on orifice plate, the center of described orifice plate is provided with material-dropping hole, the end face of described orifice plate is evenly equipped with the airtight sealing of hole run through, described material-dropping hole is communicated with discharging chamber, described discharging chamber is communicated to described tangential meticulous discharging opening by adapter, described discharging chamber is positioned at the bottom position of center housing, described center housing is installed in the central upper portion position of described bottom working cavity by the supporting structure on top, described material-dropping hole along protection tube inner space described in discharging chamber, independently compressed air cell is formed between the outer wall of described protection tube and the top of described center housing, described compressed air cell is communicated with the airtight sealing of hole of described orifice plate, described compressed air cell is circumscribed with pore bar, the outer end of described pore bar exposes to the sidewall of described bottom working cavity, passage is had in described pore bar, described passage is communicated to described compressed air cell, described passage passes into compressed air.
It is further characterized in that:
Under duty, the lower end of described top drive shell, the upper surface of bottom working cavity are fastenedly connected by upper flange plate, lower flange;
Described upper flange plate is positioned at the bottom outer shroud side face of top drive shell, described lower flange is positioned at the top outer shroud side face of described bottom working cavity, the inner side of described lower flange connects the outer ring surface of orifice plate by reinforcing rib structure, described lower flange, reinforcing rib structure, orifice plate is combined to form orifice flange, described orifice flange is described supporting structure, orifice plate and the described center housing of described orifice flange are connected to form overall structure, it makes assembling fast, location is convenient, and orifice plate and lower flange are combined to form the hermetic seal good stability that entirety makes graded region, make the classification performance balance of structure entirety reliable, classification goes out product narrow diameter distribution,
Described reinforcing rib structure and lower flange, the link position place that orifice plate is corresponding are round-corner transition;
Preferably, described power set are specially motor, and the output of described motor connects the power shaft of described grading wheel by shaft coupling, and described motor Vertical dimension is arranged, guarantee to take up room little;
The bottom in described discharging chamber is positioned at position immediately below described material-dropping hole and is provided with deflection vertebral body structure, and described deflection vertebral body structure changes material falling direction and makes material enter tangential meticulous discharging opening;
A kind of vertical air-flow ultrafine crusher, after it adopts above-mentioned ultra-fine grain grading plant, the anchor ring of the below of described bottom working cavity is evenly equipped with several and pulverizes nozzle, several pulverizing nozzles described are communicated to Compressed Gas respectively by pipeline and divide gas distribution plate, described Compressed Gas divides the air inlet of gas distribution plate to pass into Compressed Gas, position directly over the jet point that second charging aperture is positioned at described pulverizing nozzle, the bottom being positioned at center housing of described bottom working cavity is provided with the first charging aperture, material is added at the first charging aperture or the second charging aperture, material arrives the disintegrating area of pulverizing jet, compressed air passes through the superonic flow nozzzle of particular arrangement to disintegrating area high velocity jet, drive material in the repeated stock of nozzle intersection, collision, reach pulverizing, upper transition region is passed through with ascending air by comminuting matter, then the grading wheel of graded region is entered, due to grading wheel High Rotation Speed, fine grained is discharged from tangential meticulous discharging opening, coarse granule is then graded wheel and throws away, coarse granule passes through transition region, return to disintegrating area and continue impact comminution, until reach smashing fineness, discharged from tangential meticulous discharging opening by grading wheel, the meal that cannot reach smashing fineness is discharged from the oversize outlet of bottom,
A kind of vertical grader, it adopts above-mentioned ultra-fine grain grading plant, the below of described bottom working cavity is provided with spirally inlet air structure, the center arrangement of the position, gas outlet of described spirally inlet air structure has the 3rd charging aperture, the position, gas outlet of described spirally inlet air structure is diffusion region, the top of described diffusion region is transition region, the bottom being positioned at center housing of described bottom working cavity is provided with the 4th charging aperture, the material of thickness mixing is added at the 4th charging aperture or the 3rd charging aperture, thickness mixed material passes through transition region, taken to the grading wheel of graded region by air-flow, the classification of grading wheel High Rotation Speed goes out fine grained and discharges from tangential meticulous discharging opening, coarse granule is graded wheel and throws away, by conducting oneself with dignity to walk downwards, because some fine grained is attached on coarse granule, also along with coarse granule is walked downwards, in time arriving diffusion region, there is spiral of air to rise, air is by making fine grained again upwards after spirally inlet air structure to diffusion region, and large or fine granule is spread apart, fine grained passes through transition region again, discharge thin by the grading wheel of graded region, coarse granule is then thrown away again downwards until the oversize outlet to bottom is discharged by grading wheel.
After adopting device and method of the present invention, complete machine is divided into upper and lower two parts, by turnover hinge structure, can complete grading wheel and bottom working cavity fast, conveniently carry out cleaning or overhauling; And due to the existence of air sealing disc, AND DEWATERING FOR ORIFICE STRUCTURE, make the material be closed in working chamber can not flow out from gap, ensure the sealing of material in whole equipment, especially the grading wheel gas sealing ability of key position is reliable; And be loaded on the upper surface of bottom working cavity due to the bottom end cover of top drive shell, namely both adopt vertical structures, make its land occupation area little, make this structure can maximize productions, the high-power structure of assembling formation, conveniently promote production capacity.
Accompanying drawing explanation
Fig. 1 is the structural representation of ultra-fine grain grading plant of the present invention;
Fig. 2 is the A place partial enlargement structural representation of Fig. 1;
Fig. 3 is the B place partial enlargement structural representation of Fig. 1;
Fig. 4 is that the C of Fig. 1 is to direction view;
Fig. 5 is the front view structural representation of vertical air-flow ultrafine crusher of the present invention;
Fig. 6 is the front view structural representation of vertical grader of the present invention;
Fig. 7 is the top view structural representation of the spirally inlet air structure of Fig. 5;
Reference name in figure corresponding to each sequence number is as follows:
Top drive shell 1, bottom working cavity 2, turnover hinge structure 3, oversize outlet 4, graded region 5, tangential meticulous discharging opening 6, grading wheel 7, power shaft 8, air sealing disc 9, internal duct 10, orifice plate 11, material-dropping hole 12, discharging chamber 13, center housing 14, pore bar 15, protection tube 16, compressed air cell 17, passage 18, ring flange 19, motor 20, deflection vertebral body structure 21, pulverize nozzle 22, pipeline 23, Compressed Gas divides gas distribution plate 24, second charging aperture 25, first charging aperture 26, spirally inlet air structure 27, 3rd charging aperture 28, 4th charging aperture 29, adapter 30, lower flange 31, reinforcing rib structure 32, orifice flange 33, airtight sealing of hole 34.
Detailed description of the invention
Ultra-fine grain grading plant, see Fig. 1 ~ Fig. 5: it comprises top drive shell 1, bottom working cavity 2, top drive shell 1 connects bottom working cavity 2 by turnover hinge structure 3, the bottom end cover of top drive shell 1 is loaded on the upper surface of bottom working cavity 2, bottom working cavity 2 is furnished with charging aperture, gas access, the bottom of bottom working cavity 2 is oversize outlet 4, bottom working cavity 2, between the drive shell of top, 1 combination zone formed is graded region 5, the top of bottom working cavity 2 is furnished with tangential meticulous discharging opening 6, the tangential meticulous discharging opening 6 of outlet of graded region 5, grading wheel 7 is equipped with in the inside of top drive shell 1, the power shaft 8 of grading wheel 7 runs through external connection power device behind the center of air sealing disc 9, the center of air sealing disc 9 has passed into compressed air by internal duct 10, the lower end of grading wheel 7 is supported on orifice plate 11, the center of orifice plate 11 is provided with material-dropping hole 12, the end face of orifice plate 11 is evenly equipped with the airtight sealing of hole 34 run through, material-dropping hole 12 is communicated with discharging chamber 13, discharging chamber 13 is communicated to tangential meticulous discharging opening 6 by adapter 30, discharging chamber 13 is positioned at the bottom position of center housing 14, center housing 14 is installed in the central upper portion position of bottom working cavity 2 by the supporting structure on top, material-dropping hole 12 is along the inner space discharging chamber 13 of protection tube 16, independently compressed air cell 17 is formed between the outer wall of protection tube 16 and the top of center housing 14, compressed air cell 17 is communicated with the airtight sealing of hole 34 of orifice plate 11, compressed air cell 17 is circumscribed with pore bar 15, the outer end of pore bar 15 exposes to the sidewall of bottom working cavity 14, passage 18 is had in pore bar 15, passage 18 is communicated to compressed air cell 17, passage 18 passes into compressed air, compressed air enters along passage 18 compressed air cell 17 seals up grading wheel 7 again lower end outer ring surface by the airtight sealing of hole 34 of orifice plate 11, guarantee the hermetic seal of material.
Under duty, the lower end of top drive shell 1, the upper surface of bottom working cavity 2 are fastenedly connected by upper flange plate 19, lower flange 31;
Upper flange plate 19 is positioned at the bottom outer shroud side face of top drive shell 1, lower flange 31 is positioned at the top outer shroud side face of bottom working cavity 2, the inner side of lower flange 31 connects the outer ring surface of orifice plate 12 by reinforcing rib structure 32, lower flange 31, reinforcing rib structure 32, orifice plate 11 is combined to form orifice flange 33, the supporting structure that orifice flange 33 is, orifice plate 11 and the center housing 14 of orifice flange 33 are connected to form overall structure, it makes assembling fast, location is convenient, and orifice plate and lower flange are combined to form the hermetic seal good stability that entirety makes graded region, make the classification performance balance of structure entirety reliable, classification goes out product narrow diameter distribution, the link position place of reinforcing rib structure 32 and lower flange 31, orifice plate 11 correspondence is round-corner transition thus increases the intensity of orifice flange,
Preferably, power set are motor 20, and the output of motor 20 connects the power shaft 8 of grading wheel 7 by shaft coupling, and motor 20 Vertical dimension is arranged, guarantee to take up room little, and can change motor according to power requirement, the power production capacity of total can be adjusted;
The bottom in discharging chamber 13 is positioned at position immediately below material-dropping hole 12 and is provided with deflection vertebral body structure 21, and deflection vertebral body structure 21 changes material falling direction and makes material enter tangential meticulous discharging opening 6;
A kind of vertical air-flow ultrafine crusher, see Fig. 5: the ultra-fine grain grading plant which employs Fig. 1, the anchor ring of the below of bottom working cavity 2 is evenly equipped with several and pulverizes nozzle 22, several pulverizing nozzles 22 are communicated to Compressed Gas respectively by pipeline 23 and divide gas distribution plate 24, Compressed Gas divides the air inlet of gas distribution plate 24 to pass into Compressed Gas, second charging aperture 25 be positioned at pulverize nozzle 22 jet point directly over position, the bottom being positioned at center housing 14 of bottom working cavity 2 is provided with the first charging aperture 26, material is added at the first charging aperture 26 or the second charging aperture 25, material arrives pulverizes the jet disintegrating area of nozzle 22, compressed air by the superonic flow nozzzle of particular arrangement (namely pulverizing nozzle 22) to disintegrating area high velocity jet, drive material in the repeated stock of nozzle intersection, collision, reach pulverizing, upper transition region is passed through with ascending air by comminuting matter, then the grading wheel 7 of graded region 5 is entered, due to grading wheel 7 High Rotation Speed, fine grained is discharged from tangential meticulous discharging opening 6, coarse granule is then graded wheel 7 and throws away, coarse granule passes through transition region, return to disintegrating area and continue impact comminution, until reach smashing fineness, discharged from tangential meticulous discharging opening 6 by grading wheel, the meal that cannot reach smashing fineness is discharged from the oversize outlet 4 of bottom.
A kind of vertical grader, see Fig. 6, Fig. 7: the ultra-fine grain grading plant which employs Fig. 1, now the below of bottom working cavity 2 is provided with spirally inlet air structure 27, the center arrangement of the position, gas outlet of spirally inlet air structure 27 has the 3rd charging aperture 28, the position, gas outlet of spirally inlet air structure 27 is diffusion region, the top of diffusion region is transition region, the bottom being positioned at center housing 14 of bottom working cavity 2 is provided with the 4th charging aperture 29, the material of thickness mixing is added at the 4th charging aperture 29 or the 3rd charging aperture 28, thickness mixed material passes through transition region, taken to the grading wheel 7 of graded region 5 by air-flow, the classification of grading wheel 7 High Rotation Speed goes out fine grained and discharges from tangential meticulous discharging opening 6, coarse granule is graded wheel and throws away, by conducting oneself with dignity to walk downwards, because some fine grained is attached on coarse granule, also along with coarse granule is walked downwards, in time arriving diffusion region, there is spiral of air to rise, air is by making fine grained again upwards behind spirally inlet air structure 27 to diffusion region, and large or fine granule is spread apart, fine grained passes through transition region again, discharge carefully by the grading wheel 7 of graded region, coarse granule is then thrown away again downwards until the oversize outlet 4 to bottom is discharged by grading wheel 7.
Above specific embodiments of the invention have been described in detail, but content being only the preferred embodiment of the invention, the practical range for limiting the invention can not being considered to.All equalizations done according to the invention application range change and improve, and all should still belong within patent covering scope of the present invention.
Claims (10)
1. ultra-fine grain grading plant, it is characterized in that: it comprises top drive shell, bottom working cavity, described top drive shell is by bottom working cavity described in turnover hinge anatomical connectivity, the bottom end cover of described top drive shell is loaded on the upper surface of described bottom working cavity, described bottom working cavity is furnished with charging aperture, gas access, the bottom of described bottom working cavity is oversize outlet, described bottom working cavity, the combination zone formed between the drive shell of top is graded region, the top of described bottom working cavity is furnished with tangential meticulous discharging opening, tangential meticulous discharging opening described in the outlet of described graded region, grading wheel is equipped with in the inside of described top drive shell, the power shaft of described grading wheel runs through external connection power device behind the center of air sealing disc, the center of described air sealing disc has passed into compressed air by internal duct, the lower end of described grading wheel is supported on orifice plate, the center of described orifice plate is provided with material-dropping hole, the end face of described orifice plate is evenly equipped with the airtight sealing of hole run through, described material-dropping hole is communicated with discharging chamber, described discharging chamber is communicated to described tangential meticulous discharging opening by adapter, described discharging chamber is positioned at the bottom position of center housing, described center housing is installed in the central upper portion position of described bottom working cavity by the supporting structure on top, described material-dropping hole along protection tube inner space described in discharging chamber, independently compressed air cell is formed between the outer wall of described protection tube and the top of described center housing, described compressed air cell is communicated with the airtight sealing of hole of described orifice plate, described compressed air cell is circumscribed with pore bar, the outer end of described pore bar exposes to the sidewall of described bottom working cavity, passage is had in described pore bar, described passage is communicated to described compressed air cell, described passage passes into compressed air.
2. ultra-fine grain grading plant as claimed in claim 1, is characterized in that: under duty, the lower end of described top drive shell, the upper surface of bottom working cavity are fastenedly connected by upper flange plate, lower flange.
3. ultra-fine grain grading plant as claimed in claim 2, it is characterized in that: described upper flange plate is positioned at the bottom outer shroud side face of top drive shell, described lower flange is positioned at the top outer shroud side face of described bottom working cavity, the inner side of described lower flange connects the outer ring surface of orifice plate by reinforcing rib structure, described lower flange, reinforcing rib structure, orifice plate are combined to form orifice flange, described orifice flange is described supporting structure, and orifice plate and the described center housing of described orifice flange are connected to form overall structure.
4. ultra-fine grain grading plant as claimed in claim 3, is characterized in that: described reinforcing rib structure and lower flange, the link position place that orifice plate is corresponding are round-corner transition.
5. ultra-fine grain grading plant as claimed in claim 1, it is characterized in that: described power set are specially motor, the output of described motor connects the power shaft of described grading wheel by shaft coupling, and described motor Vertical dimension is arranged.
6. ultra-fine grain grading plant as claimed in claim 1, is characterized in that: the bottom in described discharging chamber is positioned at position immediately below described material-dropping hole and is provided with deflection vertebral body structure.
7. a vertical air-flow ultrafine crusher, is characterized in that: it adopts the ultra-fine grain grading plant as described in claim arbitrary in claim 1 to 6.
8. a kind of vertical air-flow ultrafine crusher as claimed in claim 7, it is characterized in that: the anchor ring of the below of described bottom working cavity is evenly equipped with several and pulverizes nozzle, several pulverizing nozzles described are communicated to Compressed Gas respectively by pipeline and divide gas distribution plate, described Compressed Gas divides the air inlet of gas distribution plate to pass into Compressed Gas, position directly over the jet point that second charging aperture is positioned at described pulverizing nozzle, the bottom being positioned at center housing of described bottom working cavity is provided with the first charging aperture.
9. a vertical grader, is characterized in that: it adopts the ultra-fine grain grading plant as described in claim arbitrary in claim 1 to 6.
10. a kind of vertical grader as claimed in claim 9, it is characterized in that: the below of described bottom working cavity is provided with spirally inlet air structure, the center arrangement of the position, gas outlet of described spirally inlet air structure has the 3rd charging aperture, the position, gas outlet of described spirally inlet air structure is diffusion region, the top of described diffusion region is transition region, and the bottom being positioned at center housing of described bottom working cavity is provided with the 4th charging aperture.
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| CN201510482688.6A CN105013588A (en) | 2015-08-03 | 2015-08-03 | Ultrafine particle classification device |
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| CN201510482688.6A CN105013588A (en) | 2015-08-03 | 2015-08-03 | Ultrafine particle classification device |
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| CN105013588A true CN105013588A (en) | 2015-11-04 |
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Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105618189A (en) * | 2016-03-29 | 2016-06-01 | 李泽华 | Ultrafine grinding device used for grinding paint and provided with pneumatic sealing device |
| CN105817295A (en) * | 2016-03-29 | 2016-08-03 | 李泽华 | Ultrafine smashing device used for smashing Chinese medicine and provided with pneumatic sealing device |
| CN106076561A (en) * | 2016-07-28 | 2016-11-09 | 李绍光 | A kind of jet mill of granularity continuously adjustable |
| CN107096608A (en) * | 2017-05-27 | 2017-08-29 | 广州天地实业有限公司 | A kind of vertical ultrafine disintegrator |
| CN107745131A (en) * | 2017-10-26 | 2018-03-02 | 余国华 | Alloyed powder sorting unit |
| CN108114793A (en) * | 2017-12-13 | 2018-06-05 | 廊坊新龙立机械制造有限公司 | A kind of horizontal type fluidized-bed airslide disintegrating mill |
| CN109127060A (en) * | 2018-08-17 | 2019-01-04 | 无锡科技职业学院 | A kind of Ultramicro-powder airslide disintegrating mill |
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Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105618189A (en) * | 2016-03-29 | 2016-06-01 | 李泽华 | Ultrafine grinding device used for grinding paint and provided with pneumatic sealing device |
| CN105817295A (en) * | 2016-03-29 | 2016-08-03 | 李泽华 | Ultrafine smashing device used for smashing Chinese medicine and provided with pneumatic sealing device |
| CN106076561A (en) * | 2016-07-28 | 2016-11-09 | 李绍光 | A kind of jet mill of granularity continuously adjustable |
| CN107096608A (en) * | 2017-05-27 | 2017-08-29 | 广州天地实业有限公司 | A kind of vertical ultrafine disintegrator |
| CN107745131A (en) * | 2017-10-26 | 2018-03-02 | 余国华 | Alloyed powder sorting unit |
| CN108114793A (en) * | 2017-12-13 | 2018-06-05 | 廊坊新龙立机械制造有限公司 | A kind of horizontal type fluidized-bed airslide disintegrating mill |
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| CN109127060A (en) * | 2018-08-17 | 2019-01-04 | 无锡科技职业学院 | A kind of Ultramicro-powder airslide disintegrating mill |
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