JPS59203648A - Finely crushing apparatus - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

[Detailed description of the invention] The present invention relates to a pulverizer.

A conventional pulverizer has an outer 1 part as shown in Figs.
111 A cylindrical rotor 2 having a large number of convex portions 1 is supported on a rotating shaft 3 on the generatrix of the surface, and a gap 4 is provided between the rotor 2 and the generatrix of the inner surface. A stator 6 having a large number of convex portions 5 is fitted, and the rotor 2 and stator 6
The object to be crushed is placed in the gap 4 between the two, and the particles of the object to be crushed are pulverized by the two-speed rotation of the rotor.

During the pulverization process of the material to be pulverized, a suction blower (not shown) connected to the product discharge port 12 is operated to supply the material from the supply port 8 provided in the lower plate of the lower casing 7 connected to the lower end of the stator 6. The pulverized particles are sucked together with air into the lower casing 7, and fixed to the lower surface of the rotor bottom plate which rotates at high speed together with the rotor 2. The conical inner surface KG of the lower casing 1 is raised by the airflow generated by the stirring blades 9, and is fed into the grinding chamber formed between the rotor 2 and the stator 6, where it is rotated at high speed. The rotating force of the rotor 2 imparts velocity energy to cause the stator 6 to collide with the stator 6 to be pulverized, and the protrusions 1 of the rotor 2 impact and crush the rotor 2, and the protrusions 1 of the rotor 2 and the protrusions of the stator 6 are crushed. 5, and further pulverize it, carry it to the upper blade in an upward spiral airflow generated by the high speed rotation of the rotor 2, and feed it into the upper casing 10 connected to the upper end of the stator 6, The centrifugal blades 11 are fixed to the upper surface of the rotor upper plate which rotates together with the rotor 2 at high speed, and are rotated by centrifugal blades 11 that are swamped on the inner circumferential surface of the upper casing 10, and are installed in the direction of the tangential force of the upper casing 10. et al7
The pulverized product is discharged from the discharge port 12 and introduced into a bag filter (not shown), where the finely pulverized product and air are separated f1.
Air is exhausted via a suction blower, and the pulverized product is sent from a bag filter to a hopper where it is stored and collected.

By the way, in the above-mentioned pulverizer, since the opening 4 between the rotor 2 and the stator 6 is generally 2 to 5 or more wide, the vortex generated in the recess 5a of the stator 6 is The strength of is weak.

Mouth) The probability of the rotor 2 hitting the particles of the object to be crushed is small.

...) The impact force of the rotor 2 on the proboscis particles to be crushed is small.

There were other drawbacks.

! In the crushing chamber formed by the rotor 2 and stator 6, air passes through the recess 1as gap 4 of the rotor 2 and the recess 5a of the stator 6, and the particles of the material to be crushed are However, since the rotor 2 is rotating at high speed, there are almost no particles of the material to be crushed that follow the four parts 1a of the rotor 2. Therefore, the gap 4 and the recess 5 of the stator 6 are provided through which the particles of the object to be crushed pass.
There are two locations a. However, the convex portion 5 and the concave portion 5a of the stator 6
Since the cross-sectional shape of is close to a rectangle, in the four parts 5a of the solid member 6, the air flows from the downward force to the upper plane while forming a vortex at a high rotational speed as shown in Figure 3. Ru. Some of the crushed particles caught in this vortex collide with the wall surface of the fourth part 5a, and are discharged from the concave part 5a into the gap 4, where they are stronger by the convex part 1 of the rotor 2. Grinding progresses due to the impact action and the grinding action between the stator 6 and the protrusion 5 . However, there is a drawback in that some of the particles to be crushed are not crushed as described above, but are drawn into the vortex, riding on the vortex and exiting from the upper end of the recess 5a to the outside of the crushing chamber.

Therefore, the average particle size of the powder 6 or product produced by such a pulverizing device varies slightly depending on the particles of the material to be pulverized, but it can only be 60 μm for polished rice and 40 μm for tofu if milled.
It was difficult to say that the pulverization was sufficiently fine, and it was not possible to obtain a fine @ frame product of the order of microns to more than 10 microns.

Furthermore, in the conventional pulverizing device, if coarse particles are mixed in with the particles of the object to be crushed, they may be discharged as coarse particles without being finely pulverized, or the pulverizer 2 or Since the stator 6 is subject to significant wear, it is desirable to first pulverize the particles to be pulverized to a certain particle size before supplying the pulverized particles, which requires a great deal of effort.

Furthermore, in the conventional pulverizing device, the fine powder in the pulverized product that is formed between the rotor 2 and the stator 6 and comes out of the pulverized stone in the pulverizing chamber coagulates in the upper casing 10. The resulting finely ground product is of poor quality because the fine powder adheres to the coarse powder and is discharged from the product outlet 12.

The present invention has been developed in consideration of the above circumstances, and does not require pre-treatment, and even if the particle size of the particles to be crushed is non-uniform, the supplied stone and the particles of the crushed substance can be easily processed. surely and fully'
f1. Grinding process The grinding process of Ishikawa improves the grinding efficiency and disperses the finely ground particles into 1-class particles, making it possible to obtain a narrow pattern # (I or JA product) with a particle size width of the micron order of good quality. The purpose of the present invention is to provide a pulverizing device with a high degree of pulverization.

Hereinafter, an example of the fine powder G9/device according to the present invention will be explained with reference to the drawings. In FIG.
Reference numeral 9 indicates a crushing section, 22 a supply section for particles of the ground material, 23 a powder particle dispersion section, and 24 a fine powder 6'1j particle classification section.

A fifth support member 26, an upper and a lower support member 26, fixed to a boss 25 supported on the upper part of the rotary shaft 3'.
As shown in the figure, the crusher 2 is radially aligned with the generatrix on the outer surface.
A fixed gap 30 is provided between a first rotor 29 formed by fixing a large number of centrifugal blades 7 to the upper surface of the upper support member 26, and the first rotor 29. A first fastener 32 having a rectangular convex portion 31 on its inner surface has a large number of rectangular convex portions 33 extending along the generatrix of its outer surface, and has stirring blades 34 on its lower surface. Cylindrical second rotor 35
The second
It consists of a stator 37. As shown in FIG. 7, the inner surface of the second stator 3I has a tooth shape in which a substantially triangular concave portion 38 and a convex portion 39 are continuous, and one side 38 of the concave portion 38 of the tooth shape
a is directed toward the center of the second rotor 35 and 1 to 5 wn
The other side 38b of the f1 recess 38 is oriented in the tangential direction of the second rotor 35, and the included angle α between one side and the other side of the n1 recess 38 is 45 to 60 degrees. and convex part 3
An arcuate surface 39a centered on the axis of the second stator 37 is formed at the tip of 9, and the width of the arcuate surface 39a is 1 m.
It is done to a certain degree. At the upper end of the inner peripheral surface of the second stator 31 is a classification ring 40 that closes the four parts 38 as shown in FIGS. 8a and 8b.
fil is provided integrally or detachably. Since this classification ring 40 may cover the entire concave portion 38 (il-base), the difference δ between its radial width and the length of the convex portion 39 may be small. As shown in Figures a and b, the second clamp may be provided on the intermediate inner circumferential surface of the child 37, in which case it is not only one stage but two stages.

It is good to have 3 dan... or 6 dan. Furthermore, the classification ring 40 may be divided and arranged in a plurality of stages at different stages in the circumferential direction.

As shown in FIG. An inverted conical lower casing 42 provided at the lower end of the first stator 32 so as to cover the same, and a bottom plate 42a of the lower casing 42.
It consists of an inlet pipe 43 for air and particles to be crushed.

The finely pulverized particle dispersing section 23 includes a centrifugal blade 44 provided on the outer periphery of the upper surface of the second rotor 35, and
An inverted conical casing 45 is provided at the upper end of the second stator 37 corresponding to the casing 45, and a space 46 is provided between the two. ing.

The pulverized particle classification unit 24 includes a classification rotor 48 provided at the upper end of the centrifugal blade 44 and having a through hole 47 at the center, and an inverted conical casing 4 corresponding to the classification rotor 48.
A classification cage 5 having a coarse powder discharge port 49 in the tangential force opposite to the rotational force direction of the second rotor 35 provided at the upper end of the classification case 5.
0, and an upper lid casing 52 which is provided at the upper end of the classification casing 50 and has a fine powder discharge port 51 in the center thereof whose base end fits into the through hole 47 of the classification rotor 48. The classification loaf 48 is formed by the upper disk 4 at the upper end of the centrifugal blade 44.
As shown in FIG. 1O, a large number of classification plates (12 in this example) are provided radially in the circumferential direction on the upper disc 48a, and a classification plate a 48b is provided at the upper end of the classification plate 48b. 1. A classification disk 48c having a hole 47; I'm here.

In FIG. 4, 53 is a pulley, 54 is a belt, and 55 is a frame.

Next, the pulverizing action of the particles to be pulverized by the pulverizing apparatus of the present invention constructed as described above will be explained. Unillustrated electricity! @! 1 is driven, runs on the belt 54, rotates 1113' through the pulley 53, and operates a suction blower (not shown) to suck air through the introduction pipe 43 into the lower casing 42. At the same time, the particles of the pulverized material supplied to the introduction pipe 43 are introduced into the lower gas song 42 on air.The particles of the pulverized material introduced into the lower cooling 72 are The airflow generated by the stirring blade @41 on the lower surface of the first rotor 29, which rotates at high speed together with the rotating shaft 3', rises while staying on the inverted conical surface of the lower casing 42, and the first rotor 29 and the first stator 32, where the coarse particles are crushed by the first rotor 29 and the first stator 32. Finely ground to a particle size of 't'Lfc
The particles to be crushed exit the first crushing chamber and ride the airflow generated by the rotation of the centrifugal blades 28 on the upper surface of the first rotor 29 and the stirring blades 34 on the lower surface of the second rotor 35, and the second stator 31 formed between the two stators and the second crushing chamber.
Here, all the particles are subjected to a pulverization action and become pulverized particles with a narrow particle size range of micron order to several microns, and exit out of the pulverization chamber.

Details of the pulverizing action of the particles to be pulverized in the second pulverizing chamber will be explained with reference to the related structure of the second rotor 35, second stator 37, and classification ring 40.

Generally speaking, when considering the air surrounding a rotating body, the air that adheres to the surface rotates at the same speed as the circumferential speed of the rotating body, whereas the air that is away from the surface rotates at the same speed as the circumferential speed of the rotating body. The greater the distance, n, the greater the delay n from the circumferential speed of the rotating body, and the smaller the speed. However, considering the concave portion 38 of the second stator 31, a vortex n2 is induced in this portion as shown in FIG. The rotational speed of the vortex is proportional to the circumferential speed υ of the free air flowing on the opening surface of the recess 38. Therefore, the larger the size of the gap 36 between the second rotor 35 and the second stator 31, the smaller the circumferential speed υ of the second rotor 35 becomes. Therefore, the rotational speed of the slow n5f=j becomes small. Conversely, the smaller the size of the gap 36, the higher the rotational speed of the vortex. So it gets caught up in the whirlpool? : The particles of the object to be crushed collide with the wall surface more strongly as the rotation speed of the vortex increases, and the particles of smaller diameter also collide with the wall surface as the rotation speed of the vortex increases. is well ground.

Further, the impact daughter rate P of the particles to be crushed by the second rotor 35 which come out into the gap 36 from the embankment of 38 yen on the fourth part is the dimension h5 of the gap 36, the particle diameter d1 of the particles to be crushed, and the diameter of the second rotor 35. Convex part 3
If the number of 3's is 11, then 1) ,, d × n,
The size of the gap 36 is small, and the convex portion 33 of the second rotor 35
When the number n is large, the impact probability P increases, and the second rotor 35 can efficiently impact and crush the particles of the object to be crushed.

Furthermore, the particles of the object to be crushed that come out from the recess 38 of the second stator 37 into the gap 36 are accelerated by the air flow circulating through the gap 36.
Ru. In this case, the larger the size of the gap 36, the more the particles
Since the time required for impact by the rotor 35 is longer,
The relative velocity between the particles and the second rotor 35 during impact becomes small, and the impact force of the second rotor 35 on the particles becomes small, but since the size of the gap 36 is extremely small, less than ifμ, Since the time until impact is shortened by the second rotor 35, the particles and the second rotor 3 during impact are
5 becomes larger, and the impact force of the particles by the second rotor 35 becomes larger. Therefore, the particles of the material to be crushed are reliably hit.

Now, since the shape of the recess 38 of the second solid rectangle 31 is approximately triangular as mentioned in Kl, the air flow f in this recess 3BK is
L is <a, a' as shown in FIG.

Divide into two: a"... and swirl, b', b". Swirl.

The particles of the object to be crushed that are caught up in b/, b//, etc. collide with the wall surface V and are crushed in substantially the same way as in the case of the conventional rectangular four parts 5a (see FIG. 3). Then, riding the vortex, one side 38aV/- of the concave portion 38 is cleared, and the tip B of the convex portion 39 is
Proceed to the gap 36 and insert the second rotor 35 at this part.
It receives a reverse blow from the convex portion 33 and is pulverized. The same effect is then applied to the concave portion 38 of the second insulator 37 and the convex portion 33 of the second rotor 35, and the crushing proceeds to the next step. On the other hand, in the case of the conventional rectangular recess 5a, the air flow n a + a' enters the recess 38 of the second stator 37 from the gap 36, which almost never occurs, and comes out again to the gap 36.
The particles to be crushed that ride on +a''...
The tips A and K of the convex portions 39 move forward on the other side 38b, and the second rotor 3 moves forward into the gap 36 by 7 >>f'L.
It receives a reverse blow from the convex portion 33 of No. 5, and is crushed and crushed. At the same time, the particles subjected to the impact crushing action further collide with the other side 38b of the recess 38, and are crushed and crushed. The same effect is applied to the concave portion 38 of the next second solid foot 37, and as a result of the crushing progressing one after another, compared to the case of the conventional rectangular concave portion 5a,
Since the impact by the second rotor 35 has a height fL not only at point B but also at point A, the probability of impact on the particles of the object to be pulverized increases, and the particles of the object to be pulverized are more effectively and efficiently pulverized. It turns out.

However, the inner circumferential surface of the second stator 31 has a pattern shown in FIG. 8a.

As shown in Figs. 9a and 9b, since the classification ring 40 based on part (or all) of the four parts 38 is not provided, the particles of the material to be crushed are not rotated at high rotational speed in the concave part 5 as in the conventional case. U that rides on the vortex (see Figure 3) and goes out of the grinding chamber all at once.
Due to the classification action of the classification ring 40, which will be described later, the residence time of the particles to be crushed in the grinding pot becomes longer, and at the same time, the concentration of the particles to be crushed in the grinding chamber increases.

When the residence time increases by sofL, the probability of receiving the crushing action increases by son, and finer pulverized particles are obtained.
Ru. In addition, when the # degree of the particles of the object to be crushed increases, the probability of collision between the particles of the object to be crushed increases, and the pulverization effect is promoted.
,ru.

Due to these two effects, the particles of the object to be ground are reliably pulverized. The particles that have been pulverized in this way try to exit into the gap 36 directly under the classification ring 40 by means of the air flow VC, since the centrifugal force caused by the rotation of the second rotor 35 is still acting here. Particles larger than a certain size are again transferred to the second
It is pushed back into the four parts 38 of the stator 37. The particles that have been pushed back by 11 degrees are subjected to the pulverization action again, and cannot pass through the part of the classification ring 40 when the size is below a certain level.Therefore, the particles of the object to be pulverized are not sufficiently pulverized. .

In this way, the finely pulverized particles that have passed through the second pulverizing chamber circle are separated by the above-mentioned gap 36 of 1β or less and the - side 38a facing the center and the other side 3.
8b is the same as the tangential force direction of the VLc second rotor 35 so that it faces the rotating second rotor 35, and both sides 38a, 38b
The second stator 37 has an included angle α of 45 to 60 degrees.
A large number of approximately triangular recesses 38 on the 111'' surface and a second
Due to the synergistic effect of the action with the classification ring 40 provided at the inner leg portion of the stator 37, finely pulverized particles of the order of microns to several microns are obtained.

The finely pulverized particles on the order of microns to several microns that have passed through this second pulverizing chamber are removed by the centrifugal blade 4 shown in FIG.
4, the particles are well dispersed without agglomeration, and are carried to the inner surface of the classification casing 50 along the outward swirling air current along the inner surface of the inverted conical casing 45.

Further, the fine powder on the order of microns adhering to the coarse powder of more than 10 microns in the finely pulverized particles is separated by the high speed rotation of the centrifugal blade 44 on its way to the inner surface of the classification casing 50. Then, the finely pulverized particles are transported to the classification rotor 4 by riding on the inward swirling airflow generated by the classification rotor 48 rotating at high speed.
Only the fine powder on the order of microns passes between the classifiers 48b, the fine powder discharge port 51, the lid outlet 11 with the air flow, and the bag filter through the discharge pipe (not shown). -Introduced into n. Here, the nitrogen gas is separated into fine powder and air and is exhausted from an exhaust pipe via a suction blower.The fine powder is sent from a bag filter to a homper and stored as a finely pulverized product. The coarse powder classified by the classification rotor 48 is bounced by the classification plate 48b and rotates along the inner surface of the classification casing 50 in the same direction as the rotational force direction of the classification rotor 48, and air is discharged from the coarse powder discharge port 49. It is discharged together with the flow and introduced into the bag filter through a discharge pipe (not shown). Here, the coarse powder and air are separated, the air is exhausted via a suction blower, and the coarse powder is sent from a bag filter to a homper and stored.

The pulverizer of the present invention is shown in the detailed assembly diagram 12 above. The pulverizer C has the same main body as the one described in fYI, and a classifier 58 is provided between the discharge pipe 51 connected to the coarse powder discharge port 49 of the classification casing 50 and the bag filter 56. The coarse powder discharge port 59 of the part 3 Shioiso 58 and the coarse powder supply port 60 provided at the entrance of the interrogator 43 of the lower casing 42 are connected at the front 61 of the n1 classifier 5.
The fine powder discharge port 62 of No. 8 is connected to the bag filter 5 through the discharge pipe 51.
An exhaust pipe 64 having a suction blower 63 in the middle is connected to the outlet of the n1 bag filter 56. 6
A feeder 5 is provided at the entrance of the introduction pipe 43 and feeds the particles to be crushed into the supply port 60. 61 is an electric motor,
It runs on a belt 54 to rotate the rotating shaft 3'. Reference numeral 68 denotes a bag filter 1 provided at the tip of a discharge pipe 69 connected to the fine powder discharge port 51 of the upper lid casing 52.
70 is a suction blower provided in the middle of the discharge pipe 11 connected to the bag filter 68.

In this pulverizer, coarse powder and some fine powder are discharged together with air from the coarse powder outlet 49 of the classification casing 5°.
When the powder follows the discharge pipe 51 and enters the classifier 58, it is classified into fine powder on the order of microns and coarse powder on the order of 10 microns. Then, the fine powder is discharged from the fine powder outlet 62 and introduced into the bag filter 56 through the discharge pipe 51, where it is separated into fine powder and air.The air is passed through the suction blower 63. Exhaust air from the exhaust pipe 64, and remove fine powder from the bag filter 56.
From there, it is sent to a hopper (not shown) and stored. On the other hand, the coarse powder passes from the coarse powder discharge port 59 to the coarse powder supply port 60 through the piping 61.
The particles are fed into the introduction pipe 43 from the feeder 65 and are fed into the supply port 66 from the feeder 65 and introduced into the lower casing 42 together with new particles of the material to be crushed. Then, it is subjected to a crushing action again in the crushing section 20, and then subjected to a finely pulverizing action in the pulverizing section 21. Therefore, with this pulverizer, it is possible to obtain a pulverized product containing only fine powder with an extremely narrow particle size range on the micron order, without containing coarse powder of 10-odd microns or more.

As can be seen from the above explanation, the pulverizing device of the present invention has a pulverizing section that pulverizes the coarse particles in the particles of the object to be pulverized in advance into fine particles having a particle size within a certain range. Since the powder is pulverized O!I in the pulverizing section, wear and tear on the second rotor and second stator of the pulverizing section is significantly reduced and durability is increased.

Moreover, unlike the conventional method, there is no need for pre-treatment of finely pulverizing the particles to be pulverized to a certain plate diameter within a certain range, so that a large amount of labor can be saved and saved.

Further, in the pulverizing device of the present invention, the inner surface of the second stator of the pulverizing section has a special shape, and the gap with the second rotor is reduced to 1wI.
Since the width is significantly narrower than L, the particles of the object to be crushed can be reliably, sufficiently, and efficiently finely pulverized.
Furthermore, the finely pulverized particles can be dispersed into nine classifications, and a finely pulverized product of good quality with an extremely narrow particle size range on the order of microns can be easily obtained in a short time.

In particular, if the coarse powder on the order of several microns obtained by classifying finely pulverized particles is returned and pulverized again, only finely pulverized products with an extremely narrow particle size range on the order of microns can be obtained. Can do 0

[Brief explanation of the drawing]

Figure 1 is a vertical sectional view showing a conventional pulverizer, Figure 2 is a partially enlarged sectional view taken along line 1-1 in Figure 1, and Figure 3 is the inside of the stator of the pulverizer in Figure 1. FIG. 4 is a longitudinal sectional view of the pulverizer of the present invention, and FIG. 5 is an enlarged sectional view taken along the line VCG of FIG. 4. , FIG. 6 is an enlarged cross-sectional view taken along line fil-III in FIG. 4, and FIG. 7 is a partial horizontal cross-section showing the combination of the rotor and stator of the pulverizing section of the pulverizer of the present invention. Figure, 8th
Figures a and b are a partial perspective view and a partial longitudinal sectional view showing a classification ring provided on the inner peripheral surface of the upper end of the stator, and Figures 9a and b are views showing a classification ring provided on the intermediate inner peripheral surface of the stator. Fig. 10 is an enlarged sectional view taken along line IV-IV in Fig. 4; FIG. 7 is an enlarged view for explaining the pulverizing action of the material to be pulverized according to the relationship, and FIG. 12 is a system diagram showing another example of the pulverizing apparatus of the present invention. 3'...Rotating shaft 20...Crushing section 21...
Fine pulverization section 22...Particle supply section for pulverized material 23.
...Finely pulverized particle separation section 24...Finely pulverized particle classification section 27...Crusher 28...Centrifugal blade 29...
・First rotor 30... Between [31... Rectangular convex portion 32... Approximately 1 stator 33... Rectangular convex portion 34°
°″+)L stirring blade 35...Second rotor 36.
...Gap 31...Second stator 38...Substantially triangular recess 38a...One side of the recess 38b...
・Other side of concave portion 39...approximately triangular convex portion 40・
...Classifying ring 41... - Stirring blade 42...
Lower coushing 43...Introduction pipe 44...Centrifugal blade 45...Inverted conical casing 41...Through hole 48...Classifying loaf 49...Coarse powder outlet 5
0... Classification casing 51... Fine powder outlet 5
2... Upper lid casing 56... Bag filter 51... Discharge pipe 58... Classifier 59...
Coarse powder outlet 61...Piping Applicant: Kawasaki Heavy Industries, Ltd.'-- Agent: Patent Attorney Gao Rujikyo 5 Figure 1 Figure 2 Figure 4 Figure 5 Figure 6 Figure 7 Figure 8 (b) Figure 10 Figure 11 Figure 7 335

Claims (1)

[Scope of Claims] 1) A fixed amount 1! is disposed between the first rotor, which is supported at the lower part of the rotating shaft, resides on the generatrix of the outer surface, and has crushers arranged radially. I
? ! a crushing section in which a first stator having a convex portion on its inner surface is fitted; The second stator is fitted on the inner surface of the 8182 stator with a gap of less than 1 hi between the second rotor and the second rotor, which has a large number of protrusions extending along the generatrix of the outer surface. is made up of four approximately triangular concave portions and convex portions] h-shaped fL, and one side of the tooth-shaped concave portion is inside the second rotor IL.
fL, and the other side of the recess is directed toward the tangential force direction of the second rotor.n1 The included angle between one side and the other side of the recess is 45 to 60 degrees. a pulverizing section having at least one stage of classifying holes that block part or all of the four sections on the inner circumferential surface of the second stator; and a stirring blade provided on the lower end plate of the first rotor. A pulverized material comprising: an inverted conical lower casing provided at the lower end of the first stator so as to cover the stirring blade; and an air and pulverized material particle guiding device provided on the bottom plate of the lower casing. a particle supply unit, a centrifugal blade provided on the outer periphery of the upper plate of the second rotor, and an inverted conical casing provided at the upper end of the second stator in correspondence with the centrifugal blade. a pulverized particle dispersion section consisting of a pulverized particle dispersion section, a classification rotor provided at the upper end of the centrifugal blade and having a through hole in the center, and a rotor provided at the upper end of the inverted conical casing corresponding to the classification rotor. A classification casing having a coarse powder discharge port in the tangential force direction opposite to the rotation direction, and a fine powder discharge port provided at the upper end of the type classification cage/g and having a base end fitted into the through hole of the classification rotor in the middle of the cage. A pulverizing device comprising a top casing and a pulverizing particle classification section. 2) The first rotor is supported at the lower part of the rotating shaft and has crushers radially extending from the generatrix of the external surface, with a certain gap between the first stator and the crusher. , supported on the top of the rotating shaft1. The second stator is fitted with a gap of VC1 or less between the second rotor and the second rotor, which has a large number of convex portions along the generatrix line of the outer surface. The inner surface of the second stator is formed into an N-shape consisting of four substantially triangular parts and a convex part, with one side of the tooth-shaped concave facing the center of the second rotor, and the other side of the concave facing the second rotation. The angle between one side of the recess and the other side is 45 to 60 degrees, and the inner circumferential surface of the second stator has an M IJ ring that partially or completely closes the recess. A pulverizing section provided in at least one stage, a finger pushing blade provided on the lower end plate of the @XlX rewriting rotor, and a finger pushing blade provided at the lower end of the first stator so as to cover the stirring blade.
a lower casing shaped like an inverted round casing; a particle supply section to be crushed consisting of an inlet pipe for introducing air and particles to be crushed provided on the bottom plate of the lower casing; and an upper part of the second rotor. Install it on the outer periphery of the top. a finely pulverized particle dispersion section consisting of a centrifugal vane, an inverted conical casing provided at the upper end of the second stator corresponding to the centrifugal vane, and a pulverized particle dispersing section comprising a centrifugal vane provided at the upper end of the centrifugal vane and a transparent casing in the center; a classification rotor having holes; a classification gauging provided at the upper end of the inverted conical casing corresponding to the fractional rotor and having a coarse powder discharge port in a tangential direction opposite to the rotational direction of the n rotor; a finely pulverized particle classification section comprising an upper lid casing provided at the upper end and having a fine powder discharge port in the center whose base end fits into the through hole of the classification rotor; and a coarse powder discharge port of the classification casing in the imitation pulverized product classification section. A classifier is provided in the middle of a discharge pipe connected to a bag filter and a coarse powder return circuit in which a coarse powder discharge port of the classified rock is connected to an inlet pipe of the particle supply section for the crushed material through a pipe. A pulverizing device having