CN104226591A - Dynamic grader - Google Patents
Dynamic grader Download PDFInfo
- Publication number
- CN104226591A CN104226591A CN201310621577.XA CN201310621577A CN104226591A CN 104226591 A CN104226591 A CN 104226591A CN 201310621577 A CN201310621577 A CN 201310621577A CN 104226591 A CN104226591 A CN 104226591A
- Authority
- CN
- China
- Prior art keywords
- grading
- fine powder
- grading wheel
- dynamic classification
- graded region
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
Abstract
The invention provides a dynamic grader which is mainly composed of a fine powder grading area, a coarse powder grading area and a lower-portion cone. The fine powder grading area is provided with a grading wheel driven by a motor; under action of negative pressure of an induced draft fan, a material enters the grading areas along with conveying airflow; under action of centrifugal force of the grading wheel, particles different in mass are separated, coarse powder particles subside and are discharged from a coarse powder outlet of the lower-portion cone, and fine powder enters the grading wheel under resistance generated by the grading wheel and is discharged from a fine powder outlet; the grading wheel and a top plate of a grading bin of the fine powder grading area are in labyrinth sealing and air sealing to realize double sealing, and air sealing is realized by arranging diagonal-type air guide grooves; a plurality of groups of hedging-type air inlets are arranged in the coarse powder grading area. The dynamic grader is wide in grading range, high in grading accuracy, high grading efficiency, long in service life and suitable for grading of various powdery raw materials.
Description
Technical field
The present invention relates to the technical field of grading plant design, particularly a kind of dynamic classification machine with high accuracy, wide grading range.
Background technology
Dynamic classification machine is that a kind of sedimentation rate of material that utilizes carries out the device of dry classification to powder body material, and in classification process, have two different power in action, one is the quality/gravity from material itself, a resistance being delivery air and producing.According to the difference of the size and Orientation of these two power, the particle of powder can be separated along different track with different decrease speeds, then discharges from the outlet of fine powder graded region and meal graded region respectively.
In dynamic classification machine of the prior art, the sealing effectiveness of grading wheel upper end is not good, causes part meal to enter in fine powder, thus greatly reduces the quality of isolated fine powder, and can not meet various power-product for varigrained classification requirement.In addition, under the effect of delivery air, powder can bump against on dynamic classification machine inwall, easily cause the sidewall of dynamic classification machine damaged, thus cause the pollution to product, and reduce the service life of dynamic classification machine simultaneously, especially more obvious when hard materials such as graded quartz.
Summary of the invention
The present invention is a kind of dynamic classification machine, comprise the fine powder graded region, meal graded region and the bottom cone that are connected successively, it is characterized in that, described bottom cone is provided with charging aperture and meal outlet, described meal graded region is provided with air inlet mechanism, described fine powder graded region is provided with grading wheel and fine powder outlet, and described grading wheel is arranged on the downside of the top board in described fine powder graded region, and described grading wheel is connected with power set; Under the effect of delivery air, material enters from described charging aperture, exports fine powder successively after the grading wheel in meal graded region, fine powder graded region from described fine powder outlet; Wherein, the sidewall one on the upside of described grader and described top board junction encloses and is provided with some indented form wind guide tanks.
In some embodiments, described grader and described top board junction adopt labyrinth sealing.
In some embodiments, described fine powder exit is connected with an air-introduced machine by a dust-precipitator, and described air-introduced machine promotes the conveying of described material and provides subnormal ambient for the inside of described dynamic classification machine.
In some embodiments, described air inlet mechanism comprises the shell being provided with blast pipe, be coaxially arranged with an inner casing in described shell, the sidewall of described inner casing be provided with some groups of relative air inlets, described material inside described inner casing through entering in described fine powder graded region.
In some embodiments, described inner casing is provided with two groups of relative air inlets, and two groups of relative air inlets are 90 ° of intersections.
In some embodiments, described power set are a motor, and the output shaft of described grader is connected with described motor by feed belt.
In some embodiments, described motor is provided with temperature sensor.
In some embodiments, the output shaft of described grading wheel is provided with temperature sensor.
In some embodiments, described grading wheel output shaft is provided with velocity sensor.
In some embodiments, described discharging opening is arranged on the bottom of described bottom cone, and described charging aperture is arranged on the sidewall of described bottom centrum.
In some embodiments, described power set are connected with a frequency converter, and described frequency converter is for controlling the rotating speed of described grading wheel.
The present invention, owing to adopting above technical scheme, makes it compared with prior art, has following advantage and good effect:
Adopt labyrinth sealing and the sealing of indented form wind guide tank in the present invention between grading wheel and top board, ensure that best sealing effectiveness, prevent meal from entering into product, thus improve effectiveness of classification; In addition, the present invention is provided with opposite-flushing type air inlet in meal graded region, is conducive to the dispersion of material, prevents material to the wearing and tearing of meal graded region sidewall simultaneously, extends the service life of equipment.
Accompanying drawing explanation
By reference to the accompanying drawings, by hereafter describe describe in detail, more clearly can understand above-mentioned and other feature and advantage of the present invention, wherein:
Fig. 1 is the structural representation of dynamic classification machine of the present invention;
Fig. 2 is that indented form wind guide tank of the present invention arranges schematic diagram;
Fig. 3 is that opposite-flushing type air inlet of the present invention arranges schematic diagram.
Symbol description:
1-fine powder graded region
11-fine powder exports
12-velocity sensor
13-temperature sensor
14-indented form wind guide tank
15-motor
16-feed belt
17-bearing block
18-grading wheel
19-top board
2-meal graded region
21-air inlet
22-blast pipe
23-shell
24-inner casing
3-bottom cone
31-charging aperture
32-meal exports
Detailed description of the invention
See the accompanying drawing that the embodiment of the present invention is shown, hereafter in more detail the present invention will be described.But the present invention can realize in many different forms, and should not be construed as by the restriction in the embodiment of this proposition.On the contrary, it is abundant and complete open in order to reach for proposing these embodiments, and makes those skilled in the art understand scope of the present invention completely.In these accompanying drawings, for clarity sake, may be exaggerated size and the relative size in layer and region.
Refer now to Fig. 1-3 detailed description according to the embodiment of a kind of dynamic classification machine provided by the invention.This dynamic classification machine is applicable to the classification of various powder raw material, form primarily of fine powder graded region 1, meal graded region 2 and bottom cone 3 three part, material is entered by bottom cone 3, after meal graded region 2 and fine powder graded region 1 classification, export fine powder successively, meal falls after rise and exports from bottom cone.
Concrete, as shown in Figure 1, the sidewall of bottom cone 3 is provided with charging aperture 31, and bottom it on be provided with meal outlet 32, material is entered in dynamic classification machine by charging aperture 31 under the effect of delivery air, and the meal be separated exports 32 by meal and exports.The upper end of bottom cone 3 connects meal graded region 2, and the upper end of meal graded region 2 connects fine powder graded region 1.Be provided with grading wheel 18 and fine powder outlet 11 in fine powder graded region 1, fine powder graded region 1 is divided into classification storehouse A and exports storehouse B two parts, and grading wheel 18 is fixedly installed on below the top board 19 of classification storehouse A, and the inside of grading wheel 18 communicates with output storehouse B; Fine powder outlet 11 is arranged on the bulkhead side exporting storehouse B, and fine powder is exported 11 places and is connected with an air-introduced machine by a dust-precipitator, and under the effect of air-introduced machine, material is separated through grading wheel 18, and isolated fine powder exports 11 by fine powder and exports.
Grading wheel 18 is also connected with power set, and for providing power to make it rotate for grading wheel 18, power set adopt motor 15 in the present embodiment; The output shaft of grading wheel 18 stretches out fine powder graded region 1, and its projecting shaft is fixed by bearing block 17; Motor 15 is connected with the output shaft of grading wheel 18 by feed belt 16, and certain motor 15 also directly can not be connected with grading wheel 18 by feed belt 16, is not restricted herein; Control also by a frequency converter on motor 15, frequency converter is for regulating the rotating speed of motor 15, thus realize the stepless speed regulation of grading wheel 18, by the size of the rotating speed of the variable frequency adjustment grading wheel 18 just centrifugal force of adjustable grading wheel 18, reach the object isolating the product granularity of specifying.
Motor 15 drives grading wheel 18 high-speed rotation, in fine powder graded region 1, form powerful centrifugal force; Material moves to ascending air in fine powder graded region 1 under the draft effect of air-introduced machine, under the influence of centrifugal force, large or heavy meal centrifugalization power is large, therefore got rid of to the peripheral limit wall to dynamic classification machine of grading wheel, and no longer by the impact of centrifugal force, naturally fall under the effect of self gravitation, export 32 by meal and export; Little or light fine powder, because of the draft of air-introduced machine, overcomes the gravity of itself, enters at grading wheel 18 inner, brings to instantaneously and exports in the B of storehouse, exports 11 export by fine powder.
In the present embodiment, bearing block 17 is provided with temperature sensor 13 and velocity sensor 12, motor 15 equally also can be provided with temperature sensor, thus operating temperature and the speed of motor 15 and grading wheel 18 can be shown intuitively, ensure that normal work and the safety in production of dynamic classification machine; And temperature sensor also has warning function, when the operating temperature of motor 15 or grading wheel 18 exceedes setting range, there will be prompting, report to the police and even shut down, to avoid device damage and to jeopardize safety.
Can there is certain interval with the junction of top board 19 in grading wheel 18, adopt labyrinth sealing and hermetic seal in the present embodiment, reach double sealing effect between grading wheel 18 and top board 19.Concrete, grading wheel 18 and the junction of top board 19 are provided with labyrinth seal structure, and complicated shape is made in its cross section, and concrete form is not restricted herein, can design as the case may be; The meal being arranged so that in the A of classification storehouse of labyrinth seal structure not easily flows to from the gap between grading wheel 18 and top board 19 in the fine powder that exports in storehouse.In the present embodiment, the sidewall of the top board above labyrinth seal structure is provided with some indented form wind guide tanks 14 that a circle is uniform, realizes hermetic seal, as shown in Figure 3, when dynamic classification machine is in running order, its inner portion thereof is in negative pressure state, ambient air outside enters along indented form wind guide tank 14 with tangential direction, accelerate the speed that surrounding air enters simultaneously, thus the gap location between grading wheel 18 and top board 19 forms strong " barrier ", effective stop powder granule enters fine powder product from the gap location between grading wheel and top board, ensure the precision of product summit cutting, effectively prevent powder granule to the impact of the seal area of top board 19 and grading wheel 18 junction and wearing and tearing simultaneously, extend the service life of equipment.The dual-seal of labyrinth sealing and hermetic seal is adopted to be to ensure that the sealing effectiveness between grading wheel 18 and top board 19 reaches best, wherein a kind of sealing device also can being selected to arrange in the concrete process implemented, not be restricted in this enforcement herein.
In the present embodiment, meal graded region 2 is provided with opposite-flushing type air inlet mechanism.Concrete, opposite-flushing type air inlet mechanism comprises the shell 23 being provided with blast pipe 22, an inner casing 24 is coaxially arranged with in shell 23, the sidewall of inner casing 24 is provided with four air inlets 21, two air inlets form one group, two air inlets often in group are oppositely arranged, and two groups of relative air inlets are 90 ° of intersections, as shown in Figure 3; When the inside of dynamic classification machine is in negative pressure state, surrounding air enters in the space between inside and outside shell along blast pipe 22, and enters into the inside of inner casing 24 by four air inlets 21; Material flow is when meal graded region 2, material is from the inner side process of inner casing, and the material of the air blanking warp entered in two groups of relative air inlets, makes material mutually clash in meal graded region 2, formed " fluidisation state ", be conducive to dispersion and " flushing " of material; Avoid the damage of material to meal graded region 2 inwall simultaneously, thus avoid the pollution because inner wall abrasion causes material, especially when hard materials such as graded quartz, effect is particularly evident.In addition, the opening part of meal graded region 2 blast pipe is provided with air regulating board, can regulate the flow that surrounding air enters, and has reached suitable " flushing " effect.Certainly, air inlet also can be set directly on the sidewall of meal graded region 2, the structure of inside and outside shell is adopted to be that conveniently surrounding air enters the control of flow in the present embodiment, only need be realized by an air regulating board, suitable change can be carried out as the case may be in air inlet number and position in addition, is not all restricted herein.
A kind of dynamic classification machine provided by the invention, has following outstanding effect:
1, dynamic classification machine precision provided by the invention is high, treating capacity large (20 kilograms-50 tons per hour), purposes are wide.Almost be applicable to the classification of various powder raw material, especially mineral filler, coating, pigment, ceramic raw material, construction material, industrial chemicals, plastic powders, metal dust, food, medicine etc.; And the present invention is by changing the grading wheel of different size, model, is applicable to the varigrained product of classification, thus reaches the wide in range effect of grading range.
2, in the present invention the rotating speed of grading wheel by Frequency Converter Control, stepless speed regulation.Summit cutting is clear, even if its maximum feature is that fluctuation appears in inlet amount, summit cutting is almost unchanged.The technical requirement of the products such as plastics, rubber, coating can be met, there is good surface smoothness.
3, the design of indented form wind guide tank is adopted in the present invention; effective stop bulky grain is mixed in product; ensure that accurate summit is cut, effectively can also prevent the sealing place gap between grading wheel and top board from expanding because of wearing and tearing, thus extend the service life of equipment.
4, in the present invention, the opposite-flushing type of meal graded region air inlet mechanism designs, improve dispersion and " flushing " effect, thus effectively improve classification efficiency, prevent hard material to the impact of dynamic classification machine inwall and damage, avoid the pollution to product, this point is particularly important for the classification of the hard materials such as high purity quartz.Meanwhile, this structural design has good effect for the dispersion of material, can effectively improve product yield 20%.
5, dynamic classification machine provided by the invention is due to good sealing effect, summit cutting accuracy is secure, therefore can form closed cycle with multiple grinding machine, form a set of eco-friendly grinding hierarchy system, a conveying equipment and a dust-precipitator can be saved between grinding machine and dynamic classification machine.In addition, the present invention also has the features such as environmental friendliness, output high-performance are stable, be realize modernization, maximize industrial necessary requirement, to ensureing that the stability of downstream product high yield, high-quality and product has great importance.
In sum, the invention provides a kind of dynamic classification machine, form primarily of fine powder graded region, meal graded region and bottom cone three part.Fine powder graded region is provided with one by motor-driven grading wheel, under the suction function of air-introduced machine, material enters grading wheel with delivery air, under the effect of grading wheel centrifugal force, being separated appears in the particle of different quality, and coarse dust sinks, and discharges from the meal outlet of bottom cone, and fine powder enters in grading wheel under the resistance that grading wheel produces, then discharge from fine powder outlet.Wherein, adopt labyrinth sealing and hermetic seal between the top board in grading wheel and fine powder graded region classification storehouse, realize dual-seal, and hermetic seal is by arranging indented form wind guide tank to realize; Meal graded region is also provided with some groups of opposite-flushing type air inlets.Grading range of the present invention is wide, effectiveness of classification is high, and service life of equipment is long, and is applicable to the classification of various powder raw material.
Those skilled in the art should be understood that the present invention can realize with other concrete forms many and not depart from the spirit or scope of the present invention.Although describe embodiments of the invention, the present invention should be understood and should not be restricted to these embodiments, within the spirit and scope of the invention that those skilled in the art can define as appended claims, make change and amendment.
Claims (11)
1. a dynamic classification machine, comprise the fine powder graded region, meal graded region and the bottom cone that are connected successively, it is characterized in that, described bottom cone is provided with charging aperture and meal outlet, described meal graded region is provided with air inlet mechanism, described fine powder graded region is provided with grading wheel and fine powder outlet, and described grading wheel is arranged on the downside of the top board in described fine powder graded region, and described grading wheel is connected with power set; Under the effect of delivery air, material enters from described charging aperture, exports fine powder successively after the grading wheel in meal graded region, fine powder graded region from described fine powder outlet; Wherein, the sidewall one on the upside of described grader and described top board junction encloses and is provided with some indented form wind guide tanks.
2. dynamic classification machine according to claim 1, is characterized in that, described grader and described top board junction adopt labyrinth sealing.
3. dynamic classification machine according to claim 1, is characterized in that, described fine powder exit is connected with an air-introduced machine by a dust-precipitator, and described air-introduced machine promotes the conveying of described material and provides subnormal ambient for the inside of described dynamic classification machine.
4. dynamic classification machine according to claim 1, it is characterized in that, described air inlet mechanism comprises the shell being provided with blast pipe, an inner casing is coaxially arranged with in described shell, the sidewall of described inner casing is provided with some groups of relative air inlets, described material inside described inner casing through entering in described fine powder graded region.
5. dynamic classification machine according to claim 4, is characterized in that, described inner casing is provided with two groups of relative air inlets, and two groups of relative air inlets are 90 ° of intersections.
6. dynamic classification machine according to claim 1, is characterized in that, described power set are a motor, and the output shaft of described grader is connected with described motor by feed belt.
7. dynamic classification machine according to claim 1, is characterized in that, described motor is provided with temperature sensor.
8. dynamic classification machine according to claim 1, is characterized in that, the output shaft of described grading wheel is provided with temperature sensor.
9. dynamic classification machine according to claim 1, is characterized in that, described grading wheel output shaft is provided with velocity sensor.
10. dynamic classification machine according to claim 1, is characterized in that, described discharging opening is arranged on the bottom of described bottom cone, and described charging aperture is arranged on the sidewall of described bottom centrum.
11. dynamic classification machines according to claim 1, it is characterized in that, described power set are connected with a frequency converter, and described frequency converter is for controlling the rotating speed of described grading wheel.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310621577.XA CN104226591B (en) | 2013-11-29 | 2013-11-29 | Dynamic grader |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310621577.XA CN104226591B (en) | 2013-11-29 | 2013-11-29 | Dynamic grader |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN104226591A true CN104226591A (en) | 2014-12-24 |
| CN104226591B CN104226591B (en) | 2017-05-10 |
Family
ID=52216001
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201310621577.XA Active CN104226591B (en) | 2013-11-29 | 2013-11-29 | Dynamic grader |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN104226591B (en) |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106391466A (en) * | 2016-09-27 | 2017-02-15 | 中航迈特粉冶科技（北京）有限公司 | Classification device of metal powder and using method |
| CN106391465A (en) * | 2016-09-20 | 2017-02-15 | 派勒（天津）纳米技术有限公司 | Large-flow multi-class device |
| CN108144854A (en) * | 2016-12-05 | 2018-06-12 | 郑州狮虎磨料磨具有限公司 | A kind of turbine airflow grader |
| CN108273740A (en) * | 2018-03-30 | 2018-07-13 | 上海益非亚粉体技术设备有限公司 | A kind of ultra-large type grader |
| CN111085436A (en) * | 2019-12-31 | 2020-05-01 | 河北科技大学 | Air flow sealing powder concentrator with pre-grading function |
Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE4234659A1 (en) * | 1992-10-15 | 1994-04-21 | Kloeckner Humboldt Deutz Ag | Separator for granular material - has cage-type impeller surrounded by ring-shaped separating chamber in which circulating granular material moves radially outwards and is skimmed off into collection pockets on circumference |
| CN2235327Y (en) * | 1995-11-06 | 1996-09-18 | 曹志国 | Vertical faced gas current jeting crushing and sorting machine |
| US5887725A (en) * | 1995-04-14 | 1999-03-30 | Ishikawajima-Harima Jukogyo Kabushiki Kaisha | Classifier having a rotatable dispersion plate |
| CN201366372Y (en) * | 2009-03-23 | 2009-12-23 | 龙岩市亿丰粉碎机械有限公司 | Vertical superfine classifier |
| CN102527639A (en) * | 2010-12-17 | 2012-07-04 | 江苏科行环境工程技术有限公司 | Downward air outlet type efficient powder concentration machine |
| CN102580924A (en) * | 2012-02-28 | 2012-07-18 | 山东惟远新材料装备有限公司 | Countercurrent classifier |
| CN203610316U (en) * | 2013-11-29 | 2014-05-28 | 上海益非亚粉体技术设备有限公司 | Dynamic classifier |
-
2013
- 2013-11-29 CN CN201310621577.XA patent/CN104226591B/en active Active
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE4234659A1 (en) * | 1992-10-15 | 1994-04-21 | Kloeckner Humboldt Deutz Ag | Separator for granular material - has cage-type impeller surrounded by ring-shaped separating chamber in which circulating granular material moves radially outwards and is skimmed off into collection pockets on circumference |
| US5887725A (en) * | 1995-04-14 | 1999-03-30 | Ishikawajima-Harima Jukogyo Kabushiki Kaisha | Classifier having a rotatable dispersion plate |
| CN2235327Y (en) * | 1995-11-06 | 1996-09-18 | 曹志国 | Vertical faced gas current jeting crushing and sorting machine |
| CN201366372Y (en) * | 2009-03-23 | 2009-12-23 | 龙岩市亿丰粉碎机械有限公司 | Vertical superfine classifier |
| CN102527639A (en) * | 2010-12-17 | 2012-07-04 | 江苏科行环境工程技术有限公司 | Downward air outlet type efficient powder concentration machine |
| CN102580924A (en) * | 2012-02-28 | 2012-07-18 | 山东惟远新材料装备有限公司 | Countercurrent classifier |
| CN203610316U (en) * | 2013-11-29 | 2014-05-28 | 上海益非亚粉体技术设备有限公司 | Dynamic classifier |
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106391465A (en) * | 2016-09-20 | 2017-02-15 | 派勒（天津）纳米技术有限公司 | Large-flow multi-class device |
| CN106391466A (en) * | 2016-09-27 | 2017-02-15 | 中航迈特粉冶科技（北京）有限公司 | Classification device of metal powder and using method |
| CN106391466B (en) * | 2016-09-27 | 2018-07-31 | 中航迈特粉冶科技（北京）有限公司 | A kind of grading plant and application method of metal powder |
| CN108144854A (en) * | 2016-12-05 | 2018-06-12 | 郑州狮虎磨料磨具有限公司 | A kind of turbine airflow grader |
| CN108273740A (en) * | 2018-03-30 | 2018-07-13 | 上海益非亚粉体技术设备有限公司 | A kind of ultra-large type grader |
| CN111085436A (en) * | 2019-12-31 | 2020-05-01 | 河北科技大学 | Air flow sealing powder concentrator with pre-grading function |
Also Published As
| Publication number | Publication date |
|---|---|
| CN104226591B (en) | 2017-05-10 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN104226591A (en) | Dynamic grader | |
| CN201168700Y (en) | Centrifugal type airflow classifier | |
| AU2006312782A1 (en) | Roller mill | |
| WO2021093255A1 (en) | External circulation roller type vertical mill | |
| CN205731673U (en) | A kind of multi-product cyclone | |
| CN203610316U (en) | Dynamic classifier | |
| CN104941769A (en) | Solid material grinding method and solid material grinding machine | |
| CN103639119B (en) | The energy-saving bilobed wheel superfine classifier of micron order | |
| JP5177610B2 (en) | Cement clinker grinding equipment | |
| CN203695426U (en) | Ultrafine powder airflow classifier | |
| CN108273740A (en) | A kind of ultra-large type grader | |
| CN110743792A (en) | High dispersion vortex powder concentrator | |
| CN204724286U (en) | A kind of solid material grinder | |
| CN201799412U (en) | Rotor-free classifier | |
| CN103028474A (en) | Micro-powder preparing device | |
| CN208627824U (en) | A kind of ultra-large type grader | |
| CN103785614A (en) | Multistage powder separating machine for multilayer stacking material distribution gas inlet fluidization | |
| CN202377193U (en) | Multi-level classifying machine | |
| CN214288686U (en) | Chromium corundum powder grinding and winnowing equipment | |
| CN105833969B (en) | A kind of pulverizer | |
| CN203437172U (en) | Fluidized bed jet mill | |
| CN203599074U (en) | Micrometer-scale energy-saving type double-impeller superfine classifier | |
| KR101513054B1 (en) | Two stage vertical centrifugal classifier | |
| CN106694366A (en) | Large micron classifier | |
| CN217043475U (en) | Integral type powder grader |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant |