CN1047228A - The air-flow sizer, the method and apparatus of preparation colorant - Google Patents
The air-flow sizer, the method and apparatus of preparation colorant Download PDFInfo
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- CN1047228A CN1047228A CN 89103336 CN89103336A CN1047228A CN 1047228 A CN1047228 A CN 1047228A CN 89103336 CN89103336 CN 89103336 CN 89103336 A CN89103336 A CN 89103336A CN 1047228 A CN1047228 A CN 1047228A
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Abstract
The air-flow sizer has powder carrier pipe and gradation chamber; Be located at the guide chamber that top, gradation chamber links to each other with the powder carrier pipe; One group of importing grid that is located between guide chamber and gradation chamber flows into the gradation chamber by opening powder and the carrier gas that imports between grid from guide chamber; The inclination gradation plate of central protuberance is located at bottom, gradation chamber; Along the gradation grid of gradation chamber sidewall setting, by the mobile eddy current that produces of the opening air between the gradation grid, so as to making centrifugal fine powder and the meal of being divided into of powder of sending into the gradation chamber with carrier gas; Be located at the discharge orifice of gradation plate center discharging fine powder; The fine powder letdown tank that links to each other with discharge orifice; And the meal floss hole that forms along gradation plate circumference.
Description
The present invention relates to and to produce high-speed eddy to the dusty material of sending into the gradation chamber so that the dusty material centrifugal classification is become a kind of air-flow sizer of fine powder and meal.The invention still further relates to the device of the preparation fine powder of equipment said flow sizer and jet mill, have the said flow of use sizer and carry out the method for preparing colorant of sorting step, and have the device of said flow sizer as the preparation colorant of elutriating apparatus.
Air-flow sizer of the prior art has Classiclon(Nagoya industrial science and technical data report 8 (4) 235,1959) and Iitahi ' s sizer models such as (Japanese mechanics meetings 59 (3) 215,1956).According to these air-flow sizers, depended on the shape of machine thereby restive granularity by the granularity of the particle of sorting.These sizers adopt a kind ofly sends into the system of gradation chamber from one dusty material, and the problem of existence is powder disperse well, and if send into dusty material then sharpness of separation is low with acceleration, the result makes the grain graininess chap that sub-elects.In order to address the above problem, a kind of method that can control gradation chamber height has been proposed among the Japanese patent application publication No. 54-48378, a kind of method has been proposed among the Japanese patent application publication No. 54-19870, the guide cylinder of cyclone shape wherein is installed on the gradation chamber.The air-flow sizer that above-mentioned two method synthesis are used has practical application.
Shown in Figure 5 is the sizer that has come into operation.
But, in the air-flow sizer of above-mentioned two methods of integrated application as shown in Figure 5, carry the part of dusty material to be cyclone shape to the gradation chamber, wherein guide cylinder 50 stands on the top, middle part of loam cake 60, and carrier pipe 80 is connected with the side face on guide cylinder 50 tops.The connected mode of carrier pipe 80 makes can be along the tangential guiding in week in the guide cylinder to the dusty material that the circumference of guide cylinder 50 is carried by carrier pipe 80.Dusty material can be sent to guide cylinder 50 from carrier pipe 80, so dusty material falls during along interior all whirling motion of guide cylinder 50.At this moment, dusty material is 50 fall with belt-like form in interior week from carrier pipe 80 along guide cylinder, therefore, dusty material flows into gradation chamber (being that dusty material just flows into the gradation chamber in week in the part of guide cylinder) with uneven disperse and density, thereby produces bad disperse.If output is bigger, will cause following problems: the easier gathering that dusty material occurs, make further disperse of dusty material, the sharpness of separation of dusty material is descended.
Need a large amount of air owing to carry dusty material, thereby make a large amount of carrier gas flow into the gradation chamber, this can cause following problem: make the grain graininess that sub-elects become big greatly thereby become towards the speed of the particle of center eddy flow in separation chamber.Therefore, in order to make the grain graininess that sub-elects less, air is flowed out from the top 140 of guide cylinder.But a large amount of outflows of air can bring following practical problem: dusty material is the loss thereupon flowing out also.
A kind of air-flow sizer shown in Fig. 6 and Fig. 7 (along the cross section of Fig. 6 II-II line) is proposed among the Japanese Utility Model publication number 54-81172, it has spiral conveying tube 150, be provided with around the gradation wall, it can reduce gradually by area to clearing end from the initiating terminal of inlet side, on communicating area, the circle between carrier pipe and the gradation chamber is provided with many air grids, periphery around described carrier pipe also is provided with circular pressure-air conveyor chamber, one group of spray orifice 220 forms on the internal perisporium of described conveyor chamber tangential, and the direction of opening and described ventilation grid are in the same way.In this air-flow sizer, made a kind of improvement, Here it is at the uniform velocity carries the dusty material with disperse can flow into the gradation chamber from the opening of ventilation between the grid.But, because pressure-air (A) sprays the problem that this turbulent flow that will cause that pressure-air produces reduces sharpness of separation from spray orifice 220.
Now, the carrying method shown in people's imaginary picture of primitive people 8 and Fig. 9 (along the cross section of Fig. 8 III-III line) is arranged, wherein saved pressure-air.But, in this method, because action of centrifugal force, dusty material flows along the inwall of carrier pipe 150, therefore, dusty material flows into the gradation chamber and flows into the gradation chamber in large quantities from end face from the ventilation grid unevenly, even thereby will obtain Fig. 6 and the obtainable effect of device shown in Figure 7 also is difficult.
And, because in Fig. 6 and device shown in Figure 7, the eddy current that helps gradation in the gradation chamber is just from ventilation grid 70 leaked-in airs, thereby in the opening inflow action of centrifugal force that eddy current produced from 70 of ventilation grids, dusty material is with the circular motion of the same mode of action of cyclone along the gradation chamber, can cause following problems: dusty material has stronger tendency to be hunted down, thereby makes fine powder be comprised in the meal side easily.
Therefore, the purpose of this invention is to provide a kind of air-flow sizer that can overcome above-mentioned variety of problems.
Another object of the present invention provide a kind of can be than the bigger trickle degree of common unit and the air-flow sizer of precision graded shot degree dusty material.
Another object of the present invention provides the device of a kind of efficient system fine powder (for example granularity is 1-20 μ m).
Another object of the present invention provides a kind of can High-efficient Production use in the potential video of static develops, have the preparation method of fine-grained colorant.
A further object of the invention provides can High-efficient Production to be used in the potential video of static develops, and has the preparation facilities of fine-grained colorant.
According to first aspect of the present invention, a kind of air-flow sizer has:
A gradation chamber that is provided with in powder carrier pipe and the sizer;
One is arranged on the guide chamber that top, described gradation chamber is communicated with described powder carrier pipe;
One group of importing grid that is arranged between described guide chamber and the described gradation chamber, powder together with carrier gas so as to flowing into described gradation chamber from described guide chamber by the opening that imports between the grid;
The inclination gradation plate that core is higher is arranged on the bottom of described gradation chamber;
The gradation grid that is provided with along the sidewall of described gradation chamber, the opening air by the gradation grid flows and produces eddy current, so as to the described powder branch of importing described gradation chamber with carrier gas by the centrifugal force handle hank fine powder and meal;
A discharge orifice that is provided with at the core of described gradation plate, the fine powder that sub-elects by this discharge orifice discharging;
A fine powder letdown tank that links to each other with described fine powder discharge orifice; And
Floss hole along described gradation plate circumference forms discharges the meal that sub-elects by this floss hole.
According to another aspect of the present invention, the device of the preparation fine powder of the gentle stream sizer of a kind of equipment one jet mill is provided, wherein:
Described sizer has a powder carrier pipe and a gradation chamber that is arranged in the described sizer; One is arranged on the guide chamber that top, described gradation chamber links to each other with described powder carrier pipe; One group of importing grid that is arranged between described guide chamber and the described gradation chamber, powder along with air are together so as to flowing to the gradation chamber by the opening that imports between the grid from described guide chamber; The inclination gradation plate that core is higher is arranged on the bottom of described gradation chamber; The gradation grid that is provided with along the sidewall of described gradation chamber, the opening air by the gradation grid flows and produces eddy current, so as to by the centrifugal force handle with carrying the described powder branch of importing described gradation chamber hank fine powder and meal; A discharge orifice that is provided with at the core of described gradation plate, the fine powder that sub-elects by this discharge orifice discharging; A fine powder letdown tank that links to each other with described fine powder discharge orifice; And, discharge the meal that sub-elects by this floss hole along the floss hole that described gradation plate circumference forms.
For the meal that sub-elects being sent to a tube connector of jet mill; And
For the powder that grinds at described jet mill being sent to a tube connector of described powder carrier pipe.
According to another aspect of the present invention, the preparation method of the development colorant of the potential video of a kind of static is proposed, this method may further comprise the steps:
A kind of composition that comprises at least a binding resin and a kind of pigment of melting mixing, cooling and the mixed product of solidification of molten, the product after pulverizing is solidified is with the preparation powder stock;
This powder stock is transported to the first gradation operation so that, wherein, in the described first gradation operation, use this powder stock of air-flow sizer sorting powder stock branch hank meal and fine powder; Described sizer has: a powder carrier pipe and a gradation chamber, a guide chamber that is connected with described powder carrier pipe that is provided with on top, described gradation chamber; One group of importing grid that is arranged between described guide chamber and the described gradation chamber, powder together with carrier gas so as to flowing to described gradation chamber from described guide chamber by the opening between the described importing grid; A bottom that is arranged on described gradation chamber at the higher inclination gradation plate of core; The gradation grid that is provided with along described gradation chamber sidewall, the opening air by the gradation grid flows and produces eddy current, so as to the described powder branch of importing described gradation chamber with carrier gas by the centrifugal force handle hank fine powder and meal; Core at described gradation plate is provided with a discharge orifice, from the fine powder that this discharge orifice discharging sub-elects, is connected in a fine powder letdown tank of described discharge orifice; And, discharge the meal that sub-elects from this floss hole along the floss hole that described gradation plate circumference forms;
The meal that sub-elects is sent to the operation of milling, then the product of milling is sent back to the first gradation operation;
The fine powder that sub-elects is sent into a multi-stage separation district, at least be divided into three parts with a separator, because wall attachment effect, fine particle can fall along curve, the main meal of being made up of the particle of the above granularity of prescribed limit partly is collected in the first, mainly the medium powder of being made up of the particle of the granularity of scope up to specification partly is collected in second portion, and the main fine powder of being made up of the particle of the following granularity of prescribed limit partly is collected in the third part; And
Collected described meal part is sent back to the first sorting operation together with powder stock.
According to another aspect of the present invention, the preparation facilities of the potential video developing of a kind of static colorant is provided, it has:
Carry a friction feeding device of the powder stock of preparation colorant continuously;
First elutriating apparatus that the powder stock of being carried by described friction feeding device is divided into fine powder and meal;
Described first elutriating apparatus has: the air-flow sizer of sorting powder stock; Described air-flow sizer has: a powder carrier pipe and a gradation chamber; Be arranged on a guide chamber that is communicated with described powder carrier pipe on top, described gradation chamber; One group of importing grid that is arranged between described guide chamber and the described gradation chamber, powder together with carrier gas so as to flowing into described gradation chamber from described guide chamber by the opening between the described importing grid; The inclination gradation plate that core is higher is arranged on the bottom of described gradation chamber; Gradation grid along described gradation chamber sidewall is provided with by the mobile eddy current that produces of the opening air of gradation grid, is divided into fine powder and meal so as to the described powder of importing described gradation chamber with carrier gas by the centrifugal force handle; Be arranged on a discharge orifice of described gradation plate core, discharge the fine powder that sub-elects by this discharge orifice; Be connected in a fine powder letdown tank of described discharge orifice; And, discharge the meal that sub-elects by this floss hole along the floss hole that described gradation plate circumference forms.
The levigate milling device of the meal that in first elutriating apparatus, sub-elects;
Conveying is by a conveying device of the levigate powder of described milling device;
Multi-stage separation device with wall attachment effect piece, the wall attachment effect by this device is separated into a meal part again at least by the fine powder that described first elutriating apparatus sub-elects, a medium powder part and a fine powder part; And
A loop back device of partly sending described continuous conveying device by the isolated meal of described multi-stage separation device back to.
Be the brief description of this Figure of description below:
Fig. 1 is the longitudinal section of air-flow sizer of the present invention;
Fig. 2 is the profile along I among Fig. 1-I line;
Fig. 3 is to improvement example shown in Figure 2;
Fig. 4 is the longitudinal section of another embodiment of air-flow sizer of the present invention;
Fig. 5,6 and 8 is longitudinal sections of simple classifier in the prior art;
Fig. 7 is the II-II cross-sectional view of sizer shown in Figure 6;
Fig. 9 is the III-III cross-sectional view of sizer shown in Figure 8;
Figure 10 is the flow chart of air-flow sizer and jet mill connected system;
Figure 11 is the flow chart of an embodiment for preparing the method and apparatus of colorant according to the present invention;
Figure 12 and 13 is respectively the cross-sectional view and the stereogram of multi-stage separation device, the work live telecast of multi-stage separation device shown in the figure;
Figure 14 is a schematic diagram of implementing preparation method's of the present invention colorant preparation facilities; And
Figure 15 A and 15B are respectively plane and the front views that imports used grid example in grid 7 and the gradation grid 9.
The contrast accompanying drawing is described the present invention in detail now.
Illustrated in figures 1 and 2 for an embodiment of air-flow sizer of the present invention.
In Fig. 1, label 1 is a main body cover, and 2 is lower case, and meal discharging bucket 3 is connected in the bottom of lower case.Form gradation chamber 4 in main body cover 1, the top of gradation chamber 4 is sealed by being installed in the annular guide chamber 5 on main body cover 1 top and the conical top cover 6 of core projection.
One group of importing grid 7 with circumferential arrangement is arranged on the next door between gradation chamber 4 and the guide chamber 5, and from the opening between the grid 7, the dusty material and the carrier gas that are admitted to guide chamber 5 flow into gradation chamber 6 with the eddy current form.In order to realize accurate gradation, should make circle by carrier pipe 8(according to the cross section of this carrier pipe of the present invention, side or polygon) flow into guide chamber 5 carrier gas and dusty material need be to each grid 7 uniform distribution, the flow path that their arrive grid 7 should take to be difficult to the form of assembling because of centrifugal force.Therefore, as shown in Figure 2, carrier pipe to be being connected in guide chamber perpendicular to the tangential direction of guide chamber, and leaves enough spaces on grid top when being communicated with guide chamber.As shown in Figure 3, a plurality of carrier pipes 8 can be set.As shown in Figure 4, carrier pipe 8 also can be connected with guide chamber perpendicular to the direction on the plane of gradation chamber 4.
Carrier gas and dusty material just are sent to gradation chamber 4 by importing grid 7 by this way, and when it is sent to gradation chamber 4 by importing grid 7, can obtain more significant disperse than simple classifier.Grid 7 can be movable, can the regulating at interval of grid.
As shown in Figures 2 and 3, import grid 7 being circular layout, the mode of its layout preferably can make powder that flows into from the opening of grid 7 and the air that carries these powder at the indoor generation eddy current of gradation, thereby powder can disperse well in the gradation chamber.The example of the shape of grid 7 is shown in Figure 15 A and Figure 15 B.
In the bottom of main body cover 1, be provided with gradation grid 9 with circumferential arrangement, the gradation air-flow that produces eddy current by gradation grid 9 is introduced gradation chamber 4 from the outside.
Higher taper shape (promptly tilting) the gradation plate 10 of core is arranged on the bottom of gradation chamber 4, at the circumference formation meal floss hole 11 of described gradation plate 10.One fine powder letdown tank 12 is connected in the core of described gradation plate 10, and the lower end of letdown tank 12 bends to L shaped, and an end of this bending is positioned at outside lower case 2 sidewalls.This letdown tank and then link to each other with an induced-draught fan as fines collection devices such as cyclone or dust arresters by one, during induced-draught fan work, suction is in sizer 4, and the required eddy current of gradation is by the air draught generation from the opening inflow gradation chamber 4 of 9 of grids.
Describe above the embodiment of air-flow sizer structure.Can send into guide chamber 5 to dusty material with carrier gas from carrier pipe 8, thereby the air that contains dusty material flows into gradation chamber 4 from guide chamber 5 by the opening that imports grid 7, on one side eddy current on one side with uniform density disperse.
When induced-draught fan when work that is connected in fine powder letdown tank 12, send into the dusty material of gradation chamber 4 with the eddy current form, owing to quickened whirling motion from the air draught of the opening inflow of 9 of gradation grids is entrained, thus centrifugal action is divided into fine powder and meal on particle.The meal of all whirling motions is discharged from 11 dischargings of meal floss hole and from the bucket 3 of bottom in gradation chamber 4.Fine powder along gradation plate 10 acclivitous apparent motions to core is arranged to the fines collection device by fine powder letdown tank 12.
The air that flows into gradation chamber 4 with dusty material flows with the form of eddy current fully, thereby, the particle of whirling motion has entad speed in gradation chamber 4, because the centripetal force that particle is subjected to, grain graininess is more little, and entad speed is relatively large, thereby the less fine powder of granularity can be by row to fine powder letdown tank 12, and, flow into the gradation chamber with uniform density substantially by dusty material, so powder can be distributed uniformly.
Specifically, in the system that uses air-flow sizer of the present invention as shown in figure 10, sizer directly is connected to this jet mill gradation with a jet mill, from the particle that jet mill grinds, sub-elect coarse granule, sent back to jet mill so that further mill once more, become big owing to send into the air capacity (air capacity of sending into from carrier pipe 8) of gradation chamber, above-mentioned gradation effect becomes more remarkable.In this example, when the output in the jet mill become big or behind the gained mill product granularity than hour, the air capacity of using in jet mill of milling will strengthen, and like this, can obtain more significant disperse effect.
For jet mill being combined with air-flow sizer of the present invention so that the device of preparation fine powder to be provided, meal discharging bucket 3 preferably is communicated with (sending into raw material to be ground from this feeding port) with the feeding port of jet mill, they are connected by jockey (as tube connector), like this, the powder that enters jet mill or discharge jet mill can be sent to the carrier pipe 8 of sizer.
In the present invention, air-supply is in no way limited to air draft system shown in Figure 1 with the method that produces eddy current in 4 bottoms, gradation chamber, and in the sort of system, extraneous air flows into by the opening of 9 of gradation grids.
An example of Figure 11 and the method and apparatus that Figure 14 shows that the preparation colorant.
Figure 11 is a flow chart.Carry also sorting there so that remove the meal part from dusty material 361 to first elutriating apparatus, the coarse granule of meal part is sent to a suitable milling device, and sends first elutriating apparatus after milling back to.Be removed coarse grained fine powder and be sent to a multi-stage separation district, powder is divided into the part of three kinds of granularities at least there, promptly, than coarsegrain part (mainly by the meal of forming greater than the particle of the particle size range of regulation), medium size part (the mainly medium powder of forming by the particle within the designated size scope) and than small grain size partly (mainly by the fine powder of forming less than the particle of designated size scope).Being sent to first elutriating apparatus than coarsegrain particle partly with dusty material 361 is also milled by milling device once more.If necessary, can be sent back to the melting mixing step than a part of particle of coarsegrain part is utilized again.
The particle of the medium size part within the designated size scope and exporting by a kind of suitable output device less than the designated size scope than small grain size particle partly.The particle that partly obtains from medium size has a kind of better size distribution and can be used as colorant.On the other hand, can send fusion step and utilization once more back to than the particle of small grain size part.
The actual specific gravity for the treatment of the powder of sorting is preferably about 0.5 to about 2, considers from the efficiency of sizing, is preferably 0.6 to 1.7.
As a kind of device for effectively separating, the multi-stage separation device shown in Figure 12 (cross-sectional view) and Figure 13 (stereogram) can be used as a kind of embodiment.In Figure 12 and 13, each sidewall has shape shown in label 322 and 324, lower wall has shape shown in the label 325, sidewall 323 and low wall 325 and be respectively equipped with knife-edge separating wedge 317 and 318, and separating wedge 317 and 318 is divided into three parts to the Disengagement zone.The fine powder that feeds the separation chamber carries nozzle 316 to be arranged on the bottom of sidewall 322.Wall attachment effect piece 326 along nozzle 316 bottom tangent extending line settings so that form reclinate long elliptic arc.The separation chamber has upper wall 327, and upper wall 327 is provided with the air inlet wedge 319 of the downward extension of knife-edge, and the top, separation chamber also is provided with the air inlet pipe 314 and 315 that feeds the separation chamber.Air inlet pipe 314 and 315 is respectively equipped with first control device 320 and second control device 321 of supplying gas of supplying gas, and they comprise (for example) damper, also are respectively equipped with static pressure table 328 and 329.Separating wedge 317 and 318 and the position of air inlet wedge 319 can be depending on the kind of feeding and the granularity that needs and having nothing in common with each other.Bottom in the separation chamber is provided with the floss hole 311,312 and 313 that leads to the separation chamber corresponding to relative section.Floss hole 311,312 and 333 throttle valve devices that can be respectively equipped with as valving.
Fine powder carries nozzle 316 to have a flattened rectangular tube portion and a band tapering rectangular tube part, the internal diameter of flattened rectangular tube portion can be 20: 1 to 1: 1 with the ratio of the narrowest place of band tapering rectangular tube part internal diameter, preferably 10: 1 to 2: 1, can obtain good transporting velocity like this.
Now the separation process in the multi-stage separation district with said structure is described as follows.Bleed by three floss holes 311,312 and 313 at least in inside, separation chamber.Fine powder carries nozzle 316 to send into the Disengagement zone at a high speed by the fine powder that feeds the Disengagement zone, utilizes the air-flow of bleeding and producing, and its flow velocity is 50 meter per second to 300 meter per seconds.Drive first control device 320 of supplying gas and to make near static pressure P air inlet pipe 314 upstream portion
1Absolute value be adjusted to 150mm.Aq or more than the 150mm.aq, preferably 200mm.aq or 200mm.More than the aq, drive second control device 321 of supplying gas and to make near static pressure P air inlet pipe 315 upstreams
2Absolute value be adjusted to 40mm.Aq is preferably 45 to 70mm.Aq, thus static pressure P regulated
1Absolute value | P
1| and static pressure P
3Absolute value | P
2| make it to satisfy relational expression:
｜P
1｜-｜P
2｜≥100
Do like this is in order to increase the gradation precision.Static pressure P
2Absolute value be preferably 45 to 70mm.Aq, like this, fine powder and meal more widely disperse in the Disengagement zone so that control granularity easily.
When | P
1|-| P
2|＜100 o'clock, the gradation precision will descend, and can not accurately remove the fine powder part, so very easily made the product after the sorting have wide size distribution.It is diffusing to carry fine powder just can not the aggregation that exist in the fine powder be collapsed with the flow velocity below 50 meter per seconds to the Disengagement zone, thereby causes the reduction of gradation output and gradation precision easily.Carry fine powder can cause intergranular collision with the flow velocity more than 300 meter per seconds to the Disengagement zone, grain graininess is descended, produce fine grained again, thereby reduce gradation output easily.
Under the wall attachment effect effect of wall attachment effect piece 326, and under the effect of the air-flow that flows at the same time, fine powder moves with curve 330, thereby separated according to its granularity and weight separately.
If the particle in the fine powder has equal specific gravity, then bigger particle (coarse granule) is split into the outside of air-flow, promptly, the first in the left side of separating wedge 318, medium grain (particle with granularity in the prescribed limit) is split into the second portion between separating wedge 317 and 318, and smaller particles (particle with the following granularity of prescribed limit) is split into the third part on separating wedge 317 right sides.Therefore, larger particles is by floss hole 311 dischargings, and medium grain is discharged by floss hole 312, and is discharged by floss hole 313 than granule.The particle mean size that preferably makes the particle that is separated to second portion is about 1 to 15 μ, and this is realized by the control separation condition.
When stating method on the implementation, adopt element connection system usually, wherein various device couples together with communication apparatus such as pipeline.The preferred embodiment of this element connection system as shown in figure 14.In element connection system shown in Figure 14, three grades are separated device 301(shown in Figure 12 and 13, its details is as previously mentioned), continuous conveying device 302, continuous conveying device 310, vibratory feed 303, collect cyclone 304, collect cyclone 305, collect cyclone 306, collect cyclone 307, the grinding mill 308 and the first elutriating apparatus 309(for example use air-flow sizer shown in Figure 4) all be connected with each other.
In the said units connected system, powder stock is sent into first elutriating apparatus 309 by continuous conveying device 302, the fine powder of removing as requested after the meal part is sent into continuous conveying device 310 by collecting cyclone 307, carries nozzle 316 to separate devices 301 to send into three grades from vibratory feed 303 at a high speed by fine powder then.The meal that sub-elects in first elutriating apparatus 309 is admitted to grinding mill 308 and is milled, and sends into first elutriating apparatus 309 together with new powder stock again.When sending into three grades of separation devices 301, utilize the suction of collecting cyclone 305 and/or collecting cyclone 306, the product after quilt is milled is to send into up to the flow velocity of 50 to 300 meter per seconds.In this suction is carried, do not carry and need strict sealing because element connection system does not resemble pressure, so recommend the use element connection system.
The size of the Disengagement zone of separator 301 is generally (10 to 50cm) * (10 to 50cm), and like this, the product after milling can be 0.1 to 0.01 second or shorter moment are divided into particle more than three kinds or three kinds.Three grades are separated devices 301 products after milling are divided into larger particles (particle with the above granularity of prescribed limit), medium grain (particle with granularity within the prescribed limit) and than granule (particle with the following granularity of prescribed limit).Then, larger particles passes through discharge tube 311, and sends the continuous conveying device 302 that holds powder stock back to by collecting cyclone 306.
Medium grain is discharged into outside the system by delivery pipe 312, is gathered into medium powder 351 so that be used as the colorant product in collecting cyclone 305.Be discharged into outside the system by delivery pipe 313 than granule, in collecting cyclone 304, collect, reclaim as fine powder then with the following granularity of prescribed limit.Collect cyclone 304,305 and 306 and also bring into play the function of air extractor, so that fine powder is delivered to the Disengagement zone by nozzle 316 by suction.
Grinding mill 308 can adopt impact grinding and jet mill.Impact grinding comprises Turbo Kogyo K.K。" the Turbo Mill " of company.Jet mill comprises Nippon Pneumatic Kogyo K.K。The ultrasonic jet mill PJM-I type of company and Hosokawa Micron K.K。" the Micron Jet " of company.The multi-stage separation device of Cai Yonging comprises and utilizes wall attachment effect in the methods of the invention, has the separator of wall attachment effect piece, for example Nittetsu Kogyo K.K。" the Elbow Jet " of company.
Usually, the preparation method who is used for the colorant of the potential video development of static may further comprise the steps: the following raw material of melting mixing: a kind of binding resin, comprise thermoplastic resin such as styrene resin (styrene resins), styrene-propene acid resin (styrene-acrylate recins), styrene-methacrylic resin (styrene-methacrylate resins), a kind of pigment (and/or a kind of magnetic material), a kind of print through prophylactic and a kind of charge control agent; Cool off subsequently, pulverize and gradation.
In the method for the invention, powder is through milling, use air-flow sizer gradation shown in Figure 4 then, powder behind the gradation is further delivered to the Disengagement zone, so that be separated at least three parts, like this, be difficult to form aforesaid aggregation in moment, both made formation, these aggregations also can be collapsed diffusing or are separated to the meal part.Therefore this method can obtain to have even composition, the branch granule product of the accurate particle of size distribution.
Colorant by the powder constituent of method and apparatus of the present invention preparation can be between pigment granules, and between colorant and the sleeve, and colorant and colorant are carried between material such as the carrier stable friction electric weight is provided.Therefore, the phenomenon that seldom produces developing fog and spread around potential video edge colorant can obtain high video density, and can improve the repeatability of semi-tone.Even after the long-term logotype of developer, also can keep original performance, high-quality video is provided for a long time.And under high temperature and high humidity environment condition, ultra-fine grain and aggregation thereof also seldom exist, thereby the friction electric weight of developer can be very stable.And with normal temperature and normal damp condition under compare, its friction electric weight changes hardly, thereby rare fuzzy and problem that video density descends, thereby the fidelity of developing is good.And the colorant video of generation can be delivered on offset medium such as the paper with very high transfer efficiency.Even when under low temperature and low humidity, using, with normal temperature and normal damp condition down relatively, the friction electric weight distributes also almost constant and very stable.Remove because per unit weight has very the ultra-fine grain composition of large charge, the colorant that method of the present invention is produced has following good characteristic: video density does not reduce, and is fuzzy, coarse or diffusion phenomena will not occur when transfer printing.
Have small grain size for example during the medium powder of average particulate diameter 3 to 7 μ in preparation, the present invention can more effectively implement than commonsense method.
Example:
To describe the present invention in more detail by example below: hereinafter " part " is by weight calculation.
Example 1
100 parts of styrene-propene acid resins
(copolymerization weight ratio: 7: 3; Mean molecule quantity: about 300,000)
80 parts of magnetite powders
(particle diameter: about 0.2μ）
2 parts of low-molecular polypropylenes
(mean molecule quantity: about 3,000)
2 parts of positively chargeable controlling agents
Have above-mentioned formula mixture colorant raw material about 1 hour of melting mixing under 180 ℃ of temperature, cooling curing then is ground into the coarse granule of 100 to 1000 μ then with hammer-mill.The actual specific gravity of this meal product 361 is about 1.5, and this meal product is placed into continuous conveying device 302, is sent to first elutriating apparatus 309 with the speed of 250 Grams Per Minutes.First elutriating apparatus 309 can adopt air-flow sizer shown in Figure 4.Importing grid 7 has 20, arranges ringwise as shown in Figure 2.Regulate to import the opening between the grid so that have 4 to 10mm interval.Gradation grid 9 has 25, regulates the opening between the gradation grid so that have 2 to 3mm interval.The set-up mode of gradation grid, make the carrier gas that flows into by the opening that imports 7 of grids eddy current and the opening leaked-in air eddy current that passes through 9 of gradation grids in the same way.Meal product 361 is carried by the air by carrier pipe 8, and sends into gradation chamber 4 with the carrier gas that flows into by the opening that imports 7 of grids with a kind of good disperse state.The powder stock 361 of sending into gradation chamber 4 is divided into meal and fine powder by the gradation air-flow that flows into by gradation grid 9.The meal of telling is levigate in a jet mill, i.e. the ultrasonic jet mill PJM-I-5 type of grinding mill 308(Nippon Pneumatic Kogyo K.K. Corp.), send first elutriating apparatus 309 after milling back to.The fine powder of telling in first elutriating apparatus 309 is found about 7.3 μ of the average diameter of fine powder after measured, and the diameter that wherein contains the particle of 12% volume is 4.0 μ or below 4.0 μ, contains 3.The diameter of the particle of 0% volume is 12.7 μ or more than 12.7 μ.This fine powder is placed into continuous conveying device 310, and sends into multi-stage separation device shown in Figure 12 and 13 by vibratory feed 303 with the speed of 250 Grams Per Minutes, so that utilize wall attachment effect to separate meal, medium powder and fine powder.Utilize the multi-stage separation device of wall attachment effect can adopt Nittetsu Kogyo K.The Elbow Jet EJ-5-3 type of K company.
When carrying fine powder, with delivery pipe 311,312 and 313 collection cyclones 304,305 that are communicated with and 306 work, so that bleed in system thereby produce suction, under the effect of suction, the product behind the mill is sent to the conveying nozzle with the flow velocity of about 100 meter per seconds.The static pressure P of air inlet pipe 314 upstream portion
1Static pressure P with air inlet pipe 315 upstream portion
2Be controlled in respectively-290mm.The aq(gauge pressure; With atmospheric pressure reduction) and-70mm.The aq(gauge pressure; With atmospheric pressure reduction).Like this, the mill afterproduct is 0.Instantaneous separated in 01 second or the shorter time.In the collection cyclone 305 of collecting isolated medium powder, obtain to be suitable for use as the medium powder of colorant, gradation output is the 80%(weight ratio), average particulate diameter is approximately 7.8 μ m wherein contain 2.The particle of 0% volume, its diameter are 4.0 μ or littler also contains 1.The particle of 0% volume, its diameter are 12.7 μ or bigger.Here term " gradation output " is meant that the medium powder (product) of final acquisition accounts for the percentage by weight of whole powder stocks of input.Find with the resulting medium powder of observation by light microscope, can't see substantially by ultra-fine grain and assemble 5 μ m or the bigger aggregation that forms.
Isolated meal is collected in collecting cyclone 306, sends into continuous conveying device 302 then.
The medium powder of Huo Deing is as colorant, with 0 like this.The hydrophobic silica of 6% weight ratio and coloring material for mixing are with the preparation developer.It is on sale that Zhi Bei developer is used for duplicator NP-1215(Canon Inc. like this) duplicate test, found that do not have to blur and fine rule is had good developing performance.
Example 2
100 parts of styrene-propene acid resins
Magnetite powder (0.3 μ) 60 parts
2 parts of charge control agents
4 parts of low-molecular polypropylene resins
Be mixed with the raw material of colorant by above-mentioned prescription, make its part heat fusing, cooling curing then, and pulverize to produce powder stock with hammer-mill, speed with 100 Grams Per Minutes is sent to air-flow sizer shown in Figure 4 to powder stock, and the meal that sub-elects is admitted to a jet mill (Nippon Pneumatic Kogyo K.K。The ultrasonic jet mill that company makes), this jet mill is connected with elutriating apparatus in mode shown in Figure 10, carries out meticulous milling then, and whiff pressure is 5Kgf/cm when milling
2The meticulous back dusty material of milling is admitted to elutriating apparatus once more with the powder stock that coarse crushing produces, and the fine powder of telling is as the meticulous product of milling.The average particulate diameter of the meticulous product of milling is 4.7 μ m wherein contain 0.The particle of 1% weight ratio, its diameter are 10 μ m or bigger, and per minute can be produced 100 grams.Above-mentioned average particulate diameter is to measure with the Coulter counter that Coulter Electronics Co company produces corresponding to the intermediate diameters of particle diameter/weight frequency distribution.
Example 3
The powder stock identical with example 2 sent into the sizer/jet mill system identical with example 2 with example 2 identical speed (100 Grams Per Minute), at 6Kgf/cm
2Mill and spray air pressure and obtain the meticulous product of milling down.Found that the average particulate diameter of product is 3.7 μ m wherein contain the particle of 0% weight ratio, and its diameter is 10 μ m or bigger, and per minute output is 100 grams.
In this embodiment, flowing into the air capacity of air-flow sizer and dusty material is about 1.2 times of example 2.
Comparative Examples 1
The dusty material identical with example 2 sent into air-flow sizer shown in Figure 5 with example 2 identical speed (100 Grams Per Minute), and the meal that sub-elects flows into a jet mill (the Nippon Pneumatic Kogyo K.K that links to each other with sizer.The ultrasonic jet mill that company makes), finish grind then that (whiff pressure of milling is 5Kgf/cm
2).The correct grinding material is sent into sizer once more with powder stock, and the fine powder that sub-elects is as the correct grinding product.The average particulate diameter that found that the correct grinding product is 7.5 μ m wherein contain 15.The particle of 0% weight ratio, its particle diameter are 10 μ m or bigger, and per minute output is 98 grams.
Comparative Examples 2
The powder stock identical with example 2 is admitted to the sizer/jet mill system identical with Comparative Examples 1 with example 2 identical speed (100 Grams Per Minute), at 6Kgf/cm
2Mill under the whiff pressure and to obtain the correct grinding product.The average particulate diameter that found that the correct grinding product is 6.3 μ m wherein contain the particle of 7.0% weight ratio, and its particle diameter is 10 μ m or bigger, and per minute output is 97 grams.
Below as can be seen, the particle diameter of the correct grinding product (fine powder that sub-elects) that obtains in example 2 and 3 is less than the particle diameter of the correct grinding product of Comparative Examples 1 and 2.
In example 3, the whiff pressure of milling is than big 1Kgf/cm in the example 2
2, air-flow increases 1.2 times, and therefore, it is about 20% that the particle diameter of correct grinding product diminishes, and promptly changes to 3.7 μ m from 4.7 μ m.
On the other hand, in Comparative Examples 2 and 1, the whiff pressure of milling improves 1Kgf/cm
2, but the particle diameter that finish grindes product but only reduces 15%, promptly from 7.5 μ m reduce to 6.3μm。
Comparative Examples 3
The powder stock identical with example 2 sent in the sizer/jet mill system identical with Comparative Examples 1, at 5Kgf/cm
2The whiff pressure of milling under, obtain the correct grinding product particle diameter be 4.7 μ m, wherein raw material is to carry with the speed that is 25 Grams Per Minutes to the maximum, and the per minute output of the product that obtains is 24 grams.The average particulate diameter of correct grinding product is 4.7 μ m, wherein contains the particle of 0.5% weight ratio, and its particle diameter is 10 μ m or bigger.
Below as can be seen, in Comparative Examples 3, obtain the correct grinding product of the average particulate diameter identical with example 2, production capacity will reduce 1/4.
Example 4
Mixing with raw material that example 2 identical being used to prepare colorant, heat fused behind the cooling curing, is pulverized with hammer-mill, and the gained powder stock is sent into a jet mill (Nippon Pneumatic Koyyo K.K.The ultrasonic jet mill that company makes) with preparation colorant powder, the average particulate diameter of this powder is 7.0 μ m, wherein contains the particle of 15% weight ratio, and its particle diameter is 4.0 μ m or littler.Zhi Bei colorant powder sub-elects the fine powder that average particulate diameter is 4.0 μ m with air-flow sizer shown in Figure 4 like this.The average particulate diameter of the fine powder that sub-elects like this is 4.0 μ m, wherein contains the particle of 7% weight ratio, and its particle diameter is 2.5 μ m or littler.The average particulate diameter of the meal that sub-elects is 7.5 μ m, wherein contains 1.The particle of 5% weight ratio, its particle diameter are 4.0 μ m or littler.The PR of fine powder that sub-elects and the meal that sub-elects is 20: 80.
Comparative Examples 4
Use the identical colorant powder of the sorting of air-flow sizer and example 4 as shown in Figure 5, the average particulate diameter that promptly has 7.0 μ m, the particle that wherein contains 15% weight ratio, its particle diameter are 4.0 μ m or littler, so that sub-elect the fine powder that average particulate diameter is 4.0 μ m.The average particulate diameter of the fine powder that sub-elects like this is 4.0 μ m wherein contains the particle of 15% weight ratio, and its particle diameter is 2.5 μ m or littler.The average particulate diameter of the meal that sub-elects is 7.4 μ m wherein contain the particle of 5% weight ratio, and its average particulate diameter is 4.0 μ m or littler.Compare with example 4, no matter the powder that example 4 is produced is fine powder or meal, and more higher particle diameter/weight frequency distribution is all arranged.
In Comparative Examples 4, the PR of fine powder that sub-elects and the meal that sub-elects is 25: 75.
As mentioned above, in the present invention, flow into the powder stock and the carrier gas of gradation chambers 4 from carrier pipe 8, flow into gradation chamber 4, in whole process, flow and powder stock density is uniform with the eddy current form from the opening that is arranged between the importing grid 9 between guide chamber 5 and the gradation chamber 4.Therefore, the gradation of dusty material is very effective and good precision arranged.And the entad speed of the particle of whirling motion diminishes in gradation chamber 4, thereby the particle diameter that sub-elects is also less.Specifically, when air flows into the connected system of sizer and jet mill in a large number with dusty material, the effect that the particle diameter that sub-elects is diminished can show significantly, and owing to the jet mill correct grinding, can obtain the less product of particle diameter effectively.
Claims (24)
1, a kind of air-flow sizer, it has:
One powder carrier pipe and the gradation chamber that is located in the sizer;
One is arranged on the guide chamber that top, described gradation chamber is communicated with described powder carrier pipe;
One group of importing grid that is arranged between described guide chamber and the described gradation chamber flows into described gradation chamber with carrier gas from described guide chamber by the opening powder between described importing grid;
The inclination gradation plate that core is higher is arranged on the bottom of described gradation chamber;
The gradation grid that is provided with along described gradation chamber sidewall flows into producing eddy current by the opening air between the gradation grid, is divided into fine powder and meal so as to making the described powder of sending into described gradation chamber with carrier gas centrifugally;
One is arranged on the discharge orifice of described gradation plate core, discharges the fine powder that sub-elects by this discharge orifice;
A fine powder letdown tank that is connected with described discharge orifice; And
Floss hole along described gradation plate circumference forms discharges the meal that sub-elects from this floss hole.
2, according to the described sizer of claim 1, it is characterized in that: described one group imports grid to be circular layout.
3, according to the described sizer of claim 1, it is characterized in that: described gradation grid is to be circular layout.
4, according to the described sizer of claim 1, it is characterized in that: described one group imports grid being circular layout, and described gradation grid to be being circular layout, and the internal diameter of the ring that forms less than the gradation grid of the internal diameter of the ring that forms of grid.
5, according to the described sizer of claim 1, it is characterized in that: described importing grid set-up mode makes powder the eddy current form flow into described gradation chamber.
6, according to the described sizer of claim 1, it is characterized in that: described importing grid set-up mode makes carrier gas produce eddy current in the gradation chamber.
7, according to the described sizer of claim 1, it is characterized in that: the arrangement of described gradation grid makes by the opening leaked-in air between the gradation grid can produce eddy current in described gradation chamber.
8, according to the described sizer of claim 1, it is characterized in that: the set-up mode of described importing grid makes powder send into described gradation chamber from the whole circumference of described guide chamber.
9, according to the described sizer of claim 6, it is characterized in that: the set-up mode of described gradation grid makes the carrier gas eddy current that flows into by the opening that imports between grid and passes through between the gradation grid opening leaked-in air eddy current in the same way.
10, according to the described sizer of claim 1, it is characterized in that: described importing grid is along the whole circumference setting of described guide chamber inwall, and described gradation grid is along the whole circumference setting of the outer wall of bottom, described gradation chamber.
11, according to the described sizer of claim 1, it is characterized in that: described powder carrier pipe is arranged on described guide chamber top, the powder of carrying by described powder carrier pipe is by importing opening between grid from flowing into described gradation chamber by the whole circumference that imports the guide chamber inwall that grid forms.
12, a kind of device for preparing fine powder is equipped with a jet mill and an air-flow sizer, wherein:
Described sizer has: a powder carrier pipe and is arranged on the gradation chamber in the sizer; One is arranged on the guide chamber that top, described gradation chamber is communicated with described powder carrier pipe; One group of importing grid that is arranged between described guide chamber and the described gradation chamber, by the opening between described importing grid, powder flows into described gradation chamber with carrier gas from described guide chamber; The inclination gradation plate that core is higher is arranged on the bottom of described gradation chamber; Along the gradation grid that described gradation chamber sidewall is provided with, by the opening between the gradation grid, air flows and produces eddy current, is divided into fine powder and meal so as to making the described powder that flows into the gradation chamber with carrier gas centrifugally; One is arranged on the discharge orifice of described gradation plate core, discharges the fine powder that sub-elects from this discharge orifice; A fine powder letdown tank that is connected with described discharge orifice; And a floss hole that forms along described gradation plate circumference, the meal that sub-elects from this floss hole discharging;
A tube connector is set so that the meal that sub-elects is delivered to described jet mill; And
A tube connector is set so that the powder after milling in the described jet mill is delivered to described powder carrier pipe.
13, according to the described device of claim 12, it is characterized in that: described one group imports grid to be circular layout.
14, according to the described device of claim 12, it is characterized in that: described sorting grid is to be circular layout.
15, according to the described device of claim 12, it is characterized in that: described one group imports grid being circular layout, and described gradation grid to be being circular layout, and by the internal diameter of the internal diameter that imports the ring that grid forms less than the ring that forms by the gradation grid.
16, according to the described device of claim 12, it is characterized in that: the mode of described importing grid setting makes powder send into described gradation chamber with the eddy current form.
17, according to the described device of claim 12, it is characterized in that: the set-up mode of described importing grid makes carrier gas to produce eddy current in described gradation chamber.
18, according to the described device of claim 12, it is characterized in that: the set-up mode of described gradation grid makes can be at the indoor generation eddy current of described gradation by the opening leaked-in air between the gradation grid.
19, according to the described device of claim 12, it is characterized in that: the set-up mode of described importing grid makes powder to send into described gradation chamber from the whole circumference of described guide chamber.
20, according to the described device of claim 17, it is characterized in that: eddy current that the feasible opening that passes through to import between grid of the set-up mode of described gradation grid flows into and the eddy current that passes through the opening inflow between the gradation grid are in the same way.
21, according to the described device of claim 12, it is characterized in that: described importing grid is along the whole circumference setting of described guide chamber inwall, and described gradation grid is along the whole circumference setting of the outer wall of bottom, described gradation chamber.
22, according to the described device of claim 12, it is characterized in that: described powder carrier pipe is provided with on the top of described guide chamber, and the powder of carrying by described powder carrier pipe flows into described gradation chamber by the whole circumference of the inwall that the opening that imports between grid forms from grid.
23, the potential video of static develops with a kind of preparation method of colorant, may further comprise the steps:
Melting mixing contains the composition of at least a binding resin and a kind of pigment, cools off and solidify the product of this fusion, and the product of pulverizing curing is with the preparation powder stock;
Powder stock is delivered to the first gradation operation so that powder stock is divided into fine powder and meal; What the wherein said first gradation operation was used is the air-flow sizer, and described sizer has: a powder carrier pipe and a gradation chamber; Be arranged on the guide chamber that top, described gradation chamber is communicated with described powder carrier pipe; One group of importing grid that is arranged between described guide chamber and the described gradation chamber flows into described gradation chamber with carrier gas from described guide chamber by the opening powder between described importing grid; The inclination gradation plate that core is higher is arranged on the bottom of described gradation chamber; The gradation grid that is provided with along described gradation chamber sidewall flows producing eddy current by the opening air between described gradation grid, is divided into fine powder and meal so as to making the powder that flows into described gradation chamber with carrier gas centrifugally; Be arranged on a discharge orifice of described gradation plate core, discharge the fine powder that sub-elects by this floss hole; Be connected in a fine powder letdown tank of described discharge orifice; And, discharge the meal that sub-elects by this floss hole along the floss hole that described gradation plate circumference forms;
The meal that sub-elects is sent to the operation of milling, will grinds good product then and send the first gradation operation back to;
The fine powder that sub-elects is sent into a multi-stage separation district, be divided at least three parts by a separator, because wall attachment effect, the particle of fine powder can fall along curve, wherein the meal of mainly being made up of the particle with the above granularity of prescribed limit partly is collected into first, mainly partly be collected into second portion, and the fine powder of mainly being made up of the particle with the following granularity of prescribed limit partly is collected into third part by having the medium powder that the particle of granularity is formed in the prescribed limit; And
Collected described meal part is sent back to the described first gradation operation with powder stock.
24, the potential video of static develops with a kind of preparation facilities of colorant, and it has:
Carry a continuous conveying device of colorant powder stock continuously;
The powder stock that described continuous conveying device is carried is divided into first elutriating apparatus of fine powder and meal;
Described first elutriating apparatus has: an air-flow sizer, and described sizer has: a powder carrier pipe and a gradation chamber; Be arranged on the guide chamber that top, described gradation chamber is connected with institute powder carrier pipe; One group of importing grid that is arranged between described guide chamber and the described gradation chamber flows into described gradation chamber with carrier gas from described guide chamber by the opening powder between described grid; The inclination gradation plate that core is higher is arranged on the bottom of described gradation chamber; The gradation grid that is provided with along described gradation chamber sidewall, flowing by the opening air between the gradation grid produces eddy current, is divided into fine powder and meal so as to making the powder of sending into described gradation chamber with carrier gas centrifugally; Be arranged on a discharge orifice of described gradation plate core, discharge the fine powder that sub-elects by this discharge orifice; Be connected in a fine powder letdown tank of described discharge orifice; And, discharge the meal that sub-elects by this floss hole along the floss hole that described gradation plate circumference forms;
A mill milling device of the meal that in first elutriating apparatus, sub-elects;
The conveying device of the powder that conveying is ground by described milling device;
Multi-stage separation device with wall attachment effect piece, it is divided at least one meal part to the fine powder that is sub-elected by described first elutriating apparatus by wall attachment effect, a medium powder part and a fine powder part, and
The meal that is separated by described multi-stage separation device is sent back to a loop back device of described continuous conveying device.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 89103336 CN1031450C (en) | 1989-05-15 | 1989-05-15 | Particles grader using gas current, method and apparatus for preparing colour material |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 89103336 CN1031450C (en) | 1989-05-15 | 1989-05-15 | Particles grader using gas current, method and apparatus for preparing colour material |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN1047228A true CN1047228A (en) | 1990-11-28 |
| CN1031450C CN1031450C (en) | 1996-04-03 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN 89103336 Expired - Fee Related CN1031450C (en) | 1989-05-15 | 1989-05-15 | Particles grader using gas current, method and apparatus for preparing colour material |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101534952B (en) * | 2006-11-02 | 2012-10-31 | 欧姆瑞克斯生物医药有限公司 | Method of micronization |
| CN111451000A (en) * | 2020-04-13 | 2020-07-28 | 青岛理工大学 | Multi-energy-field-drive-based walnut shell micro-powder multi-particle-size-domain grading device and method |
| CN113231310A (en) * | 2021-05-19 | 2021-08-10 | 三亚城投众辉新型建材有限公司 | Environment-friendly machine-made aggregate processing device and method |
| CN114618779A (en) * | 2021-12-31 | 2022-06-14 | 贺州市耀德粉体有限公司 | Calcium carbonate powder multi-stage classification method |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2012045477A (en) * | 2010-08-26 | 2012-03-08 | Ricoh Co Ltd | Classifying apparatus and classifying method, toner and method for producing the toner |
-
1989
- 1989-05-15 CN CN 89103336 patent/CN1031450C/en not_active Expired - Fee Related
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101534952B (en) * | 2006-11-02 | 2012-10-31 | 欧姆瑞克斯生物医药有限公司 | Method of micronization |
| CN111451000A (en) * | 2020-04-13 | 2020-07-28 | 青岛理工大学 | Multi-energy-field-drive-based walnut shell micro-powder multi-particle-size-domain grading device and method |
| CN113231310A (en) * | 2021-05-19 | 2021-08-10 | 三亚城投众辉新型建材有限公司 | Environment-friendly machine-made aggregate processing device and method |
| CN113231310B (en) * | 2021-05-19 | 2022-01-11 | 三亚城投众辉新型建材有限公司 | Environment-friendly machine-made aggregate processing device and method |
| CN114618779A (en) * | 2021-12-31 | 2022-06-14 | 贺州市耀德粉体有限公司 | Calcium carbonate powder multi-stage classification method |
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| Publication number | Publication date |
|---|---|
| CN1031450C (en) | 1996-04-03 |
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