JPS6164375A - Sorter - 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 Field of Industrial Application The present invention is applicable to, for example, a vertical mill in which powder and granules are raised inside a casing by a gas supplied from below inside the casing, and the particle size of the powder and granules is increased. Therefore, the present invention relates to a classifier that can selectively take out particulate matter out of a casing.

BACKGROUND ART FIG. 20 is a simplified cross-sectional view of a static type vertical mill 1 of the prior art. The prior art vertical type E)v1 will be explained using FIG. Inside the casing 1a of I-y, 7 Epl, there is a tape/
I/2 is arranged, and the drive means 3i' (by which the tape /L/2 is rotationally driven. This tape /L/2 is
It includes a table liner 2a for pulverizing powder and granules.

On the table liner 2a, there are a plurality of crushed a-
La 4 is placed. The crushing roller 4 is attached to the arm 5
6 for angular displacement. One end of the arm 6 is connected to a pressurizing means 7 extending outside the casing 1a. This pressing means 7 elastically urges the arm 5, thereby pressing the crushing roller 4 onto the table liner 2a.

A supply pipe 8 for supplying raw materials such as powder or granules is provided on the tape/L/2. Further, above the table 2, a classifier 9 is provided. The classifier 9 includes a substantially conical cone 10 and a classifier blade 11 . Vertical Mi/X/]
The ceiling plate 12 is provided with an outlet 13 for discharging the powder to the outside of the casing 1a. Further, below the table 2 of the casing 1a, there is provided an air outlet 14 for supplying gas for raising the powder and granular material within the casing 1a, as will be described later.

In the vertical mill 1 having the above-described configuration, the powder and granules supplied from the supply pipe 8 fall onto the table 2 .

At this time, since the cheagle 2 is rotationally driven by the driving means 3, the powder particles enter between the table liner 2a and the crushing a-ra 4 due to centrifugal force. The granular material crushed by the table liner 21 and the crushing roller 4Vc is moved up inside the casing 1a by the gas from the air outlet 14.

This granular material is inserted into the guide hole 1 between the cone 10 and the ceiling plate 12.
5 into the classifier 9. At this time, the powder having a particle size larger than a predetermined size by the classifier 11 is dropped downward in the cone 10, and is again tape/l/
It falls onto 2a. The powder particles having a particle size smaller than the predetermined particle size are sent out from the casing 11 through the outlet 13 by the gas flow from the air outlet 14 . The powder falling from the cone 10 onto the cheagle 2 is mixed with the powder coming from the supply pipe 8, and is crushed by the table liner 2a and the crushing roller 4.

Although the vertical mill lv1 that performs pulverization as described above has a simple configuration, it is not possible to obtain powder or granules of any desired particle size from the discharge port 13. That is, since the particle size of the granular material obtained from the discharge port 13 is set in advance by the guide vanes 11, it is difficult to obtain granular material of an arbitrary particle size.

Figure 21 shows Ike's prior art rotary blade type vertical M/L/
20 is a simplified cross-sectional view of the vertical mill 2.
It is a graph for explaining the classification function of 0. This prior art is similar to the prior art of FIG. 20, and corresponding parts have the same reference numerals. In this prior art, the cone 1 constituting the classifier 9 in the description of the prior art in FIG.
A feature is that a plurality of rotary vanes 21 are provided in the circumferential direction above the casing 1a in the cage Q provided with the guide vanes 11 and 0.

The rotor blade 21 has its lower end fixed to υ22 in FIG.

In the vertical type Mi/L/20 having the above-described configuration, the powder and granular material supplied from the supply 1iFB ascends within the casing la through a process similar to that described in FIG. 20. At this time, the powder and granules try to pass through the gaps between the plurality of rotary blades 21 that are rotationally driven together with the gas from the air outlet 14, but as described above, since the rotary blades 21 are rotationally driven, Powder particles larger than a predetermined particle size are subjected to a large centrifugal force and fall down below the casing la.

- The small powder particles with a diameter of 10,000 particles pass through the gap between the rotary blades 21 and are discharged from the discharge port 13 to the outside of the casing 1λ. On the other hand, the powder having a large particle size that has fallen below the casing 1a is crushed again on the Teig/I/2.

In the vertical Mi/L' 20 having the above configuration, the particle size of the powder obtained from the discharge port 13 can be changed by changing the rotational speed of the rotary blade 21. The operating condition of the vertical mill 20 will be explained with reference to FIG. 22. When the rotary rack 21 is rotating at a certain constant speed, the particle size configuration of the powder and granular material obtained from the discharge port 13 is as follows.
This is indicated by line 200 in FIG.

Next, when the rotational speed of the rotary blade 21 is reduced, the particle size structure of the powder obtained from the discharge port 13 is as shown in line 2 in Figure @22.
It will be shown as 01. At this time, the angles that lines 200 and 201 in FIG. 22 make with the horizontal axis are θ] and θ, respectively.
2, these θ1. The tangent value N obtained from θ2
is expressed by the following formula.

N1=tanθ1 ・+11N
2==tan θ2 − [21 As described above, the Y, which indicates the particle size structure of the powder obtained by changing the rotational speed of the rotary blade 21, satisfies the following formula as shown in FIG. results.

N1=N2...
(3) Therefore, by changing the rotational speed of the rotating base 21, it is possible to obtain any predetermined particle size distribution, but in each case, the particle size range is constant.

For example, in the case of crushing cement in the vertical type Mi/I/20, the above-mentioned RT method is used because of the quality of the product when using the cement obtained from the discharge port 13.

Therefore, it is desirable that the particle size structure of the powder or granular material as shown in FIG. 22 be made to have a wide range of particle sizes as much as possible. However, in the case of vertical q E /l/ 2' O, since the grinding time of the granular material is short, the proportion of the circulating part of the granular material in the casing 1a increases as described above, and therefore the above-mentioned @ There was a problem that the amount of N became large, that is, the particle size structure of the powder obtained from the discharge port 13 became extremely narrow.

FIG. 23 is a simplified cross-sectional view of a vertical MI p30 that is a combination of the static type shown in FIG. 20 and the rotary blade type shown in FIG. 21. The vertical type E/1/30 is similar to the prior art described above, and corresponding parts are given the same reference numerals. The vertical type E/L' 30 of this prior art has a classifier 9 as a classifier in the casing 1a, which consists of a cone 10 and a classification blade 11 as shown in Figure 20, and a rotary blade 21 as shown in Figure 21. This is the configuration provided. The raw material powder supplied from the supply port 8 rises within the casing 1a through the process described in connection with the prior art described above. The powder and granules that have risen in this way pass through the guide hole 15, the classification blade 11, and the cone 1.
It falls within 0. At this time, powder particles having a particle size larger than a predetermined particle size are dropped below the cone 10 by the classification blade 11 .

The granular material that has entered the cone 10 is then classified as described above by the rotary blade 21 which is rotationally driven by the VC moving means 23, and the classified granular material is discharged through the discharge port 13. Two Vcffs are taken out from the outside of the casing 1a. The remaining part of the granular material falls inside the 10th cone, falls again onto the tape/X/2, and is pulverized.

The vertical type E/L'30 having such a configuration also includes problems similar to those pointed out in the vertical type Mi1v20 in FIG. 21. In other words, the particle size structure of the powder and granules discharged from the discharge port 13 is narrow, and even if the center cylinder of the particle size distribution of the powder and granules obtained by changing the rotation speed of the rotation @ 21 changes, this powder and granules The problem is that the width of the particle size distribution does not change and a distribution of arbitrary width cannot be obtained.

Common to the prior art as described above, the distance N points are as follows. That is, the problem is that it is difficult to set the width of the particle diameter of the powder obtained from the discharge port 13 to an arbitrary width depending on the application VC of the powder or granule.

Problems to be Solved by the Invention The present invention solves the above-mentioned drawbacks and makes it possible to set the width of the distribution regarding the particle size of the powder and granules obtained by passing through a classifier to an arbitrary predetermined width. The purpose is to provide a classifier that can

Means for Solving Interstitial Storage The present invention firstly provides a plurality of classification vanes arranged under a ceiling plate in the circumferential direction, where gas and powder particles supplied from below inside a casing containing a classifier collide with each other. and a discharge means for taking out the radially circular VC particles of each classifier to the outside of the casing, and a bleed means for discharging the powder and granules to the outside of the casing in the radial direction of the classification blades. This classifier is characterized in that the powder and granules discharged from the outlet and the bleed means are mixed.

Second, the classifier is provided with a means for adjusting the size of the flow part through which the powder and granular material of the air extraction means flows, and a collecting means for collecting the powder and granular material from the classifier, and a collecting means for collecting the powder and granular material from the classifier. a detecting means for detecting the distribution shape of the particle size of the powder and granules collected by the means, and outputting a plant related to this distribution state; This classifier is characterized in that the size of the passing portion is changed by the means for adjusting the size of the weekly portion.

Gas and granular material supplied from below within the working casing rise within the casing and are classified one or more times by the classification blades. Before and after one or more of these classifications, the powder and granules are discharged from the casing by the discharge means and the bleed means so that they are naturally mixed by the gas iK.

Further, the powder and granular material obtained by the mixing is collected by a collecting means. The particle size distribution of the collected powder and granules is detected by a detection means, and a means for adjusting the size so that the detected color has a predetermined size corresponds to the detected size. Mi, I encourage you. This slowed adjustment means adjusts the amount of powder and granular material taken out of the casing via the bleed means and the discharge means, respectively.

Embodiment FIG. 1 is a sectional view of the vertical type E/I/40 according to the first embodiment of the present invention, FIG. 2 is a plan view of the vertical type E/L'40, and FIG. It is a perspective view of a part of mold Mi/L/40.

The configuration of the vertical mill 40 will be explained using Figures 1 to 3. A tape/I/42 having a vertical axis of rotation is arranged on the dacing 41 of the vertical Mi 1v40, and is rotated by a driving means 43.

This tape/l/42 includes a table body 42a and a tape μ liner 42b fixed to the table body 42a. A plurality of rotatable rotating rollers 44 are installed at intervals in the circumferential direction on the Taeg μ liner 42b. The support shaft 45 of the crushing a-ra 44 is connected to the arm "46" and the pivot shaft 47.
The desks are connected so that the angle can be changed through. Axis 4 of arm 46
The end opposite to 7 is connected to a pressing means 48 that is sharpened outwardly of the taping 41 . This pressurizing means 48 elastically presses the arm 46, and the crushing a-ra 44 presses the tape.
It is pressed against the liner 42b.

Below the tape A/42 of the casing 41, there is provided an air blowing port 49 for supplying gas to blow up and convey the crushed powder and granules upward into the casing 41, as will be described later. The gas supplied from the feeding port 49 flows through a blowing means 50 such as a duct provided below the tape μ42 surrounding the tape/L/42, and is blown from below the tape 1v42. It can be raised.

Inside the casing 41, above the tape/v42, a supply pipe 51 for supplying powder or granular material, which is a raw material, is provided so as to extend outward from the casing 41. Further upwards within the casing 41 is an inverted g! 5Ir! is provided with a conical cone 52 and a plurality of classifiers 53 disposed near the upper end of the cone 52 in the opening direction! The P class device 54 has a cone 52
and classification@53. The upper end of the part p7453 is provided with a ceiling plate 55 against which the powder blown up inside the gauge jig 4I collides, and this ceiling plate 55 forms a part of the casing 4].

, a discharge means 57 is provided on the ceiling [55] for ejecting the powder and granules that have been C-classified by the dividing M blades 53 and moved into the space 56 formed by the cone 52 and the classifier 53 to the outside of the casing 41. provided. In addition, the remaining portion of the ceiling plate 55 has a plurality of air extraction means 59 such as a duct that communicates the ceiling [55 directly below the space 58 in the casing 41 with the exhaust means 57].
m, 59b.

59C and 59d (there are four in this embodiment, and the general reference numeral 59 is used) are provided. Further, each air extraction means 59 is provided with a damper 60a, respectively.

60b, 60c, and 60d (collectively referred to as 60) are provided.

The vertical M/L' 40 having the #R configuration as described above and the operating state of the classifier 54 will be explained. Referring to Figure @1, the raw material powder supplied from supply 951 falls onto tape A/42. Since the tape/L/42 is rotationally driven by the driving means 43Vc, the powder on the tape/I/42 is moved between the table liner 42b and the crushing a-ra 44 by the centrifugal force. , shattered. The pulverized powder material rises inside the casing 41 by the gas flow from the air outlet 49 and the air blowing means 50.

FIG. 4 is a graph showing the particle size structure at each stage, which will be described later, such as pulverization and sizing of powder and granular material.

The horizontal axis represents the particle size X of the powder or granular material, and the vertical axis represents the weight % of the powder or granular material having each particle size X.

The relationship between the particle size of the powder after being crushed and the ratio of the weight of the powder having each particle size to the weight of the gold powder particles is shown by line 202 in FIG. 4 111.

A point P1 on the horizontal axis of FIG. 4(1) indicates the center vagina of the particle size of the powder or granular material. A portion of the granular material that has risen inside the casing 4 is transported by the gas flow and classified into multiple classes! 453 and has a grain size that is 0 larger than the grain size predetermined in relation to the angle formed with the radial direction of the classification blade 53, that is, a powder grain that has a relatively large weight. teeth,
A large centrifugal force is applied to it, and it reaches the side wall 52a of the cone 52 and falls inside the cone 52 along the side wall 52m.

On the other hand, particles other than the particles falling in the space 56 are conveyed in the direction of the discharge means 57 by the gas flow. Further, within the casing 41, a portion of the particulate material that is not suitable for the classification blade 53 is guided to the discharge means 57 via the air extraction means 59.

The relationship between the particle size of the powder particles subjected to i[TIM between the classification blades 53 and the ratio of the weight of the powder particles having each particle size to the weight of the passed powder particles is shown by line 203 in FIG. 4 121. Show. Point P2 on the horizontal axis is one corner of the center of the particle size.

Line 203 of Figure 4 (2) @ Line 20 of Figure 4 (Exit)
2, it can be seen that the part of the granular material that has passed between the rotary blades 53 has a small particle size selected from among the granular material that has been crushed by the pulverizer a-ra 44vc. The relationship between the particle size of the powder passing through the air extraction means 59 and the weight of the powder having each particle size is shown by line 204 in FIG. 4(3). That is, compared to the powder and granules that are classified by the classification blades 53 and directed to the discharge means 571C as shown by the line 203 in FIG. 4(2), more powder and granules with larger particle sizes are included.

Further, the powder and granular material heading from the space 56 to the discharge means 57 and the powder and granule transported to the discharge means 57 via the air extraction means 59 are as follows:
The mixture is mixed inside the discharge means 57 and discharged as a product. The relationship between the weight and the total powder weight is shown by line 205 in Figure 4 (4).
5 at the center of the particle size for the graph. Figure 4 (4)
It can be seen from the graph that the composition of the powder and granular material obtained from the discharge port 64 as described above includes powder and granular material with a wide range of particle sizes.

Line 207 in FIG. 4(6) shows the structure of powder and granular material that does not reach the aforementioned classification blade 53 and falls inside the casing 4 without moving into the space 56. is made up of powder and granules with relatively large particle sizes.

Figure 5 (1) shows the graph of Figure 4 (2), and Figure 5 (2)
is a graph obtained by converting the coordinates of the graph of line 105 in FIG. Logarithm log of the weight proportion R% with particle size X or more (1og
R) is a complicated a-Sin-Ramler diagram.

, lines 208 and 209 in Fig. 5 111 are Fig. 4 (2)
and lines 203 and 204 in FIG. 4(3), respectively. The angle θ3 that the lines 208 and 209 each make with the horizontal axis of the graph. The direct tangent of θ4 is N3. It is N4,
Line 2 in Figure 4 12) The tangent of the angle θ5 at 0 is N
5, and the following formula holds true.

tanθ3 = N 3 −・−
1lltanθI, 4+= N 4
−151tanθ5 = N 5
-+61 Also, the following relationship exists between these tangents.

N5<N3...(7)N5
<N4...(8) That is, in this example, it was possible to obtain a powder having a wide range of particle size distribution with an arbitrary particle size centered.

In addition, by adjusting and changing the opening degrees of the dampers 60a, 60b, 160C, and 60d, the amount of powder passing through the air extraction means 59 can be changed.
1) The cypress of the center hole P4 and the curvature of the line 205 can be changed. That is, it is possible to realize parallel movement of the line 2]0 in the left-right direction in FIG. Therefore, it was possible to obtain a powder having an arbitrary particle size structure.

FIG. 6 is a cross-sectional view of a portion of the vertical type E/l/70 according to the second embodiment of the present invention, and FIG.
FIG. This example is similar to the previous example;
Corresponding parts are given the same reference numerals. In the vertical type M/L/70 of the present embodiment, an opening 72 is provided in the casing 41 in the circumferential direction 1' (open in the circumferential direction 1') as a sorting blade. It is fixed to a rotating shaft 73 that passes through the means 57, and rotates 1tl [f173 is the driving means 7
It is driven by 4 times 5 times. Further, the upper end of each rotor blade 72 is coplanarly fixed to a mouth-shaped fixed piece 72a. The vertical mill 7 (lcn
What should be noted here is that the top is below the half plate 551W, and the space 58 radially outward of the rotary slide 72 and the exhaust means 57 are communicated with air extraction means 59&, 59b such as ducts.

59C and 59d were provided. These air extraction means 59 have nine gunba 60λ, 60b, respectively.

60C and 60d are provided.

The classifier 54 includes a rotary blade 72, an air extraction means 59fx, etc.

The production state of the vertical E/shield 70 having the above configuration will be explained. The process until the granular material is pulverized by the pulverizing roller 44 (not shown) is the same as that described in the first embodiment. A part of the powder and granular material that has risen inside the casing 41 is driven to rotate by the mainstream air current @72
However, as a result of colliding with the rotor blade 52, momentum is given to it in a radially outward direction.

In such a granular material, the speed of the gas flow and the rotor blade 7
Powder particles exceeding a predetermined particle diameter of 9, which is determined based on the rotation speed of 2, etc., separate from the gas flow and fall within the casing 41.

Further, the powder and granular material that has passed through the gap between the rotary blades 72 and entered the space 75 is directed toward the discharge means 57. On the other hand, a part of the powder and granular material that has risen inside the dashing 4 is taken out from the inside of the casing 41 via the air extraction means 59, and the powder and granular material taken out via the air extraction means 59 moves into the discharge means 57 and is removed from the casing 41 through the air extraction means 59. 56
The powder and granules moved from the ground are naturally mixed by the gas flow.

The particle size structure of the pulverized and classified powder as described above is the same as that explained in the basic VC@1 practical example. In other words, the powder having the particle size structure shown in FIG. 4H immediately after being crushed by the crushing a-ra 44 (see FIG. 1) is as follows:
The grain size 2n of the granular material in the space 56 that has been classified by the rotary blade 72 is shown by the line 203 in Figure 4 (2). If the rotational speed of the rotary blade 72 is increased, the above-mentioned centrifugal force applied to the granular material increases, and even the granular material with a smaller particle size is classified and falls inside the casing 41. Therefore, the particle size structure of the powder moving into the space 75 can be as shown by the line 203a in FIG. 4(2).

On the other hand, the air extraction means 59 is lit! The particle size composition of the powder and granular material that is mixed in the discharge means 57 is shown by the line 204 in FIG.
This is indicated by line 205. Furthermore, as mentioned above, the composition of the powder particles falling inside the VC casing 41 is shown in Fig. 4 (6).
) is indicated by line 207.

As described above, it was possible to obtain the same effects as those described in the first embodiment. That is, it is possible to obtain granular material having an arbitrary particle size configuration.

FIG. 8 is a sectional view of a portion of the vertical mill 80 according to the third embodiment of the present invention, and FIG. 9 is a plan view of the vertical mill 80 of FIG. This embodiment is similar to the actual case described above, and corresponding parts have the same reference numerals. Vertical type Mi/L/ of this example
80 is provided with an inverted substantially conical cone 52 and a classifier 53 as shown in the first figure in the VC casing 41, and a support member 71 as shown in the sixth figure is provided in the space 56 inside these.
, a rotating member 72, a rotating shaft 73, and a driving means 74 are provided, and the classifying blade is composed of the classifying blade 53 and the rotary blade 72.

The noteworthy points of the vertical mill 80 having such a basic configuration are the air extraction means 59a and 59C that communicate the space 58 directly under the ceiling plate 55 and the discharge means 57, and the air extraction means 59a and 59C directly under the ceiling plate 55. This is because air bleed means 59b and 59d are provided to communicate the space 56 outside the rotary blade 72 in the radial direction and the discharge means 57.

The air extraction means 59a, 59b, 59C, and 59dK are provided with dampers 60a, 60b, 60c, and Sod, respectively.

The operating state of the vertical mill 80 having the above configuration will be explained. Referring also to FIG. 1, raw material powder is supplied from the supply pipe 51 and is crushed between the tape μ liner 42b and the crushing roller 44.

At this time, the weight distribution according to the particle size of the powder and granules during the period after being crushed but not yet classified is line 2 in Figure 4 hl.
02. The crushed powder and granules that have risen inside the casing due to the gas flow from the air outlet 49 are
It is guided to the classification blade 72 near the upper part of the cone 52.

The primary classification action of the granular material by the classification blades 53 and the cone 52 is similar to the classification action in the first embodiment. The particle size structure of the granular material transferred into the space 56 after this primary classification is shown by line 211 in Figure 4 (1), indicating that the granular material with a large particle size has been removed. After this primary classification, the granular material is subjected to secondary classification by rotation 172. The classification action by this rotary blade 72 is similar to the classification action by the second embodiment vcg, and the line 212 in Fig. 4
The granular material having the particle size structure shown in is classified and placed in the space 7.
Move within 5. The powder in the space 75 is conveyed to the discharge means 57 by the gas flow.

On the other hand, a portion of the granular material that has ascended within the r-tongue 41 and reached the vicinity of the space 58 is removed by the air extraction means 59a.

It is discharged to the discharge means 57 via 59C. Further, a part of the powder and granular material in the space 75 after the above-mentioned primary classification is removed by the air extraction means 5.
9b, 59d to discharge means 57. The powder and granular material conveyed into the discharge means 57 via the bleed means 59a, 59b, 59C*59d is naturally mixed within the discharge means 57 by the gas flow. As above, the 4th FX
Since the powder having the particle size distribution of lines 202, 211, 212 of IIt) is mixed in the discharge means 57 and discharged f'L, the particle size composition of the powder finally obtained is as shown in FIG. 4) line 205.

On the other hand, by adjusting the openings of the dampers 60 provided in the air bleed means 59, the powder and granules are moved to the discharge means 60 via the air bleed means 59 and mixed with the powder and granules moved from the space 75. You can change the ratio of Therefore, the center of the grain size of line 205 in Figure (4) @4! The river of straight P4 and the curvature of line 205 can be changed. In other words, it was possible to obtain a powder having an arbitrary particle size configuration.

Air bleed means 59a, 59b in the embodiments described above.

The combination of 59C, 59d and the space 56, 75 communicating with the ejection means 57 via these is not limited to the combination in this embodiment, but can be any predetermined combination. @ In the case of the vertical MiIv80 equipped with the classifier 53, the cone 52, and the rotor blade 72 as shown in Figure 8, the air extraction means 59 should be placed radially outside the classifier 53 as shown in Figures 1 and 6. You can also do it.

FIG. 10 is a sectional view of the vertical type Mi/L/85 according to the fourth embodiment of the present invention. The basic structure of the vertical Mi 1v85 of this embodiment is similar to the embodiment VC described above, and corresponding parts are given the same reference numerals. In the vertical type Mi/L/85 of this embodiment, an inverted substantially conical cone 52 is provided on the table 42, and the third embodiment (see FIG. 8) is provided between the cone 52 and the ceiling plate 55.
A supporting IDF member 71 and a rotary blade 72 are provided. The vertical type E/l/85 of this embodiment has such a basic configuration.
The noteworthy point is that a classification blade 87 is provided between the vicinity of the upper end of the cone 52 and the casing 41, and an air bleed means 59 is provided that communicates the space 58 directly under the ceiling plate 55 with the discharge means 57. be.

Figure @11 is a simplified sectional view seen from the cut plane S:U-U in Figure 10, and Figure 12 is a simplified side view of the classification blade 87 seen from the direction of the arrow in Figure @11. It is. @1 Classifying blade 8 to explain the classifying blade 87 with reference to Figures 10 to 12
7 is a substantially rectangular plate-shaped piece 87h, 87b,...-, 87
nC@ (referred to as 87) cone 52 and r-
The sink 41 is spaced apart in the same direction. For example, the longitudinal direction of the wing piece 871 coincides with the radial direction of the cone 52, etc., and the angle θ (see @12 figure) formed by the wing piece 87a and the horizontal direction is the old wing piece 87a, 87b, etc.
, 87nlCIJi to be common.

Gap 8 between these blades 871.87b, -, 87nq
When the powder passes through 8 a, 88 b, 88 C, . . . , 88 n (collectively referred to as 88), the first
Enter in the direction of arrow E from the bottom of Figure 0, that is, from the bottom of Figure 12, and turn in the direction of arrow F. Wing pieces 87a arranged in this way.

87b, -, 87n are supports 89a, 90a; 89
b, 90b; 189n, 90n (reference numerals 41 to 89.90) respectively fix the cone 52 and dataling 41VC for angular displacement.

The operation of the vertical Mi A/85 having the above-mentioned configuration is basically the same as that of the previous embodiment. Referring also to Fig. 1, the powder and granular material of the raw material is supplied from ¥f51 and 1 tape ply? 42b and the crushing roller 44. At this time, the gravity distribution according to the particle size of the powder or granules during the period after being crushed but not yet classified is as shown by line 202 in FIG. 4m. The pulverized powder material that has risen inside the casing 41 by the gas flow from the air outlet 49 passes through the classification blade 87 during ITEM.
7, the particles are rotated in the casing 41 at ζ0, for example, in the direction of the arrow F in FIG. 11, and as described in the explanation of FIG. 1, are subjected to primary classification by the centrifugal force caused by the rotation.

The particle size structure of the granular material that has moved into the space 58 after the primary classification is shown by the line 211 in FIG. 4 (11), indicating that the granular material with a large particle size has been removed.

After this primary classification, the powder and granular material is subjected to secondary classification by a rotary blade 72. This rotation) The classification action by 172Vc is the same as the classification action in the @2 embodiment. 4
Powder having a particle size configuration shown by line 212 in FIG. 1 is classified and moved into space 75. The powder in the space 75 is conveyed to the discharge means 57 by the gas flow.

On the other hand, a portion of the particulate material that has ascended within the casing 41 and reached the vicinity of the space 58 is taken out to the C discharge means 57 via the air extraction means 59. Exhaust means 57 via bleed means 59
The powder and granules conveyed therein are naturally mixed within the discharge means 57 by the gas flow. As described above, Fig. 4 11)
Since the powder having a particle size distribution of lines 211 to 212 is mixed and taken out in the discharge means 57, the particle size composition of the final Vc-containing powder is as shown in line 20 of FIG. 4 (4).
It can be made to be 5.

On the other hand, the opening degree of the gap 88 of the classification arc 87 is 89.90
is changed by changing the angular displacement.

By changing the degree of opening and the number of revolutions of the rotary body 72, a classification effect similar to that described in the above embodiment can be obtained. In other words, the particle size structure of the granular material can be made such that the lines 211 and 212 in FIG. a? It is possible to change the width of the line 205 in the left-right direction in FIG. 4 (0) and the particle size of the center jet P4, which shows the structure.

FIG. 13 is a sectional view of a vertical mill 91 according to a fifth example of the present invention, and FIG. 14 is a plan view of the vertical mill 91. The vertical type Elv91 of this embodiment is similar to the above-mentioned embodiment,
Corresponding parts are denoted by the same reference numerals.The notable points of the vertical mill 91 of this embodiment are, firstly, that it is similar to the vertical mill 80 shown in the eighth figure of the third embodiment; A cone 52 and a classification blade 53 are provided in the casing 41, and a support portion 1, a rotary blade 72, a rotating shaft 73, and a movable device 74 are provided in the cone 52.Secondly, a ceiling plate is provided. A space 56 located one page below 55 and sandwiched between the cone 52 and the rotor 72
The duct lk which communicates the air extraction means 5 with the exhaust means 57
9a, 59b, 59c, and 59d are provided.

The operating state of the vertical type Mi/L'91 having such a basic configuration is basically similar to the operating state of, for example, the third and fourth embodiments described above. In other words, the granular material crushed on the tape/v42 rises inside the casing 41 and is classified.
53, it is possible to classify and remove coarse powder particles whose particle size is larger than a predetermined area. space 5
A portion of the powder and granular material transferred into the space 75 is transferred to the space 75 through secondary classification by the rotary blade 72, and is then transferred to the discharge means 57.

The remaining particulate matter in the space 56 is moved to the discharge means 57 via the air extraction means 59, where it is naturally mixed with the particulate material moved from the space 75 by the gas flow.

That is, as explained in the above-mentioned example, the particle size composition of each powder before and after IC primary classification, after secondary classification, and finally obtained is as shown in line 2 of FIG. 4, 11).
02, 211, 212 and line 20 in Figure 4 (4)
It can be done as shown in 5. In addition, by adjusting the opening degree of the gap of the classification blade 53 and the rotation speed of the rotary blade 72, the particle size structure of the powder finally obtained is shown in Figure 4 (4).
) The extent of the horizontal spread of the line 205 in the rg4 diagram and the degree of centrality P4 can be changed arbitrarily.

@Figure 15 shows 'J E , 1 on the vertical axis of the sixth embodiment of the present invention.
FIG. The vertical E/S 92 of this example is similar in construction to the vertical M/L/80 of the third embodiment (see FIG. 8), and corresponding parts are designated by the same reference numerals. Vertical type Mi/L/40,7 of the above-mentioned first to fifth embodiments
0.80, 85.91, the air extraction means 59 is provided in communication with the ceiling plate 55 and the exhaust means 57, and the ceiling plate 55
The powder and granular material in the spaces 56 and 58 immediately below was guided to a non-air means 57vc. However, the present invention does not require such an air extraction means 59.
Regardless of the arrangement, the end of the air bleed means 59 on the opposite side from the connection part with the discharge means 57 is located inside the r-tang 41 below the ceiling plate 55 as shown in Figure i15. You can.

FIG. 16 is a sectional view of a portion of the vertical type Mi/L/93 according to the seventh embodiment of the present invention. The vertical type Mi μ93 of this embodiment is similar in configuration to the vertical type Mi/L/80 (see @8 figure) of the third embodiment described above, and corresponding parts are given the same reference numerals. Vertical model zLz40.70,8 of the above-mentioned first to fifth embodiments
At 0.85.911C and Ln, the air extraction means 59 is provided to communicate the ceiling plate 55 and the exhaust means 57, and removes the powder and granules in the space 56.58 directly under the ceiling plate 55 to the exhaust means 57.
I tried to lead to. However, in the present invention, regardless of the arrangement of the air bleed means 59, as shown in FIG. It may be arranged so that it is in the space 56 between the rotary blades 72.

FIG. 17 is a system diagram of a control device for the classifier 54 according to the @8 embodiment of the present invention. The powder and granular material that has been classified and discharged from the discharge means 57 as described in the previous embodiment is conveyed via a pipe line 131 to a cyclone 130 serving as a collection means. A fan 133 is connected to the cyclone 130 through a conduit 132, and generates a swirling motion of the gas and powder in the cyclone 130 by sucking the fist of gas inside the cyclone 130.

The valve means 134 that conveys the powder separated from the gas flow within the cyclone 130 is provided with a valve means 135 having a function of preventing gas from flowing into the cyclone 130 from the pipe line 134. from

Valve means 135 in the direction in which the powder or granular material is conveyed within the 9-way 134
Further downstream, a detection means 136 is provided that detects the distribution state of the particle size of the powder and granules and outputs the tangent @N expressed by, for example, Equation 5. The powder that has passed through the detection means 136 is taken out as a product.

The N waterfalls outputted from the detection means 136 are controlled by drive devices 74 and 138 that drive the rotary blades 72 and damper 60, etc., which constitute the separator 54, respectively, so that the N clay falls in a predetermined shape. Made by! Adjustment means 1 for controlling merit and coarseness
37 will be man-powered. Therefore, when the N basket detected by the detection means 136 and indicating the particle size distribution of the powder or granular material has a deviation from a predetermined value, the adjustment means 137
4° 138 or the like to adjust the rotational speed of the rotary tool 72, the opening degree of the damper 60, etc.

As a result, the particle size distribution of the powder discharged from the discharge port changes, and the slope of the line 210 in FIG. 5 (12) changes. Therefore, the value of @loquan N changes and can be brought closer to the predetermined value.

The damper 60 in the above-described embodiment includes the air extraction means 59vc.
However, it may be provided in the discharge means 57 as shown in the 18th figure.

FIG. 19 is a system diagram of a cormorant control device for a classifier 54 according to a ninth embodiment of the present invention. This embodiment is similar to the seventh embodiment described above, and corresponding parts have the same reference numerals.
The pulverized powder material that has ascended through the container 1 is subjected to IC classification by the classification blade 53 as described in the description of the first fruit. The air 14561' in the cone 52 (the moved powder and granules are discharged to the outside of the R-rung 41 via the discharge means 57, the pipe 131
The cyclone 130bvc is transported via the cyclone 130bvc. In addition, a part of the powder in the air 1ij58 outside the cone 52 is discharged to the outside of the r-tank l4 by the air extraction means 59, and is transferred to the pipe g+
Dikmin 130alc is transported via 3+a.

Cyclone 130@, 130b is f path 132a.

A fan 133 is connected via +32b. The conduits 134a, +34b for transporting the granules separated from the gas stream in the cyclones 130a, 130b are provided with valve means 135a, 135b, respectively. Conduit 134&
, 134t) in the direction in which the powder or granular material is conveyed.
35 is provided with a detection means 136 for detecting a distribution rectangle related to the particle size of the powder and granular material and outputting the tangent bαN expressed by, for example, Equation 5. is rejected as a product.

The N cylinders output from the detection means 136 are inputted to driving means 98a and 98b that drive dampers 98 and 99 provided on the g paths 132a and 132b, respectively, so that the N cylinders become predetermined cages. Ru. Therefore, the detection means 1
When the N saliva indicating the particle size distribution of the powder or granular material detected in 36 has a deviation from a predetermined straightness, the adjusting means] 37 drives the die z<93.99 via the driving means 99a and 99b. However, cI conduit 13211. which can change the flow rate and therefore the flow velocity of the gas flow passing through conduits 132a and 132b.
When the flow rate of the gas flow in 132b changes, the bleed means 59
The amount of powder and granular material discharged from the discharge means 57 changes.

Therefore, the particle size composition of the powder that passes through the detection means 136 and is finally collected changes, and the particle size structure changes as shown in line 21 in FIG. 5(2).
0's annoyance changes. In this way, it is possible to bring the N shape closer to the predetermined shape. Although the air extraction means 59 has been described as being provided on the ceiling plate 55, it may also be provided on the side wall of the casing 41.

Effects According to the present invention as described above, the powder and granules before and after classification by the classifier are respectively taken out of the casing, and the taken out powder and granules are mixed naturally. Further, the distribution sheet regarding the particle size of the powder and granular material mixed in this way is detected by the detection means, and the powder and granular material before and after the classification are taken out so that this distribution state approaches the distribution state that has been predetermined. The amount was made to vary. Therefore, it was possible to arbitrarily determine the width of the distribution regarding the particle size of the powder.

[Brief explanation of the drawing]

1 is a sectional view of a vertical mill 40 according to a first embodiment of the present invention, FIG. 2 is a plan view of the vertical mill 40, and FIG. 3 is a vertical mill 40 of the first embodiment.
4 is a graph for explaining the operating condition of the classifier 54, and FIG. 5 is an o-Sin-Ramler diagram for explaining the operating condition of the classifier 54. , @ Figure 6 is a cross-sectional view of a portion of the vertical type ``Al2O'' of the second embodiment of the present invention, Figure 7 is a plan view of the vertical type Mi 1v70, and Figure 8 is a diagram of the third embodiment of the present invention. 9 is a sectional view of a portion of the vertical mill 80, FIG. 9 is a plan view of the vertical mill 85, and FIG. 10 is a sectional view of a vertical mill 85 according to the fourth embodiment of the present invention. Figure 11 is a simplified sectional view taken from the cross section line XI-u in Figure 10, Figure 12 is a simplified side view of the classification blade 87 seen from the direction of the arrow in Figure il1, and Figure 13 is a cross-sectional view taken from the cross section line XI-u in Figure 10. A sectional view of the vertical mill 91 according to the fifth embodiment of the invention, Figure @14 is the vertical mill 91
FIG. 15 is a plan view of a vertical type mirror according to a sixth embodiment of the present invention.
16 is a sectional view of a portion of the vertical E/93 according to the seventh embodiment of the present invention, and FIG. 17 is a sectional view of a portion of the vertical E/93 according to the seventh embodiment of the present invention. A system diagram of the separate device of the container 54, FIG. 18 is the Ikenomi l1fJ of the embodiment shown in FIG.
FIG. 19 is a system diagram of a control device for a classifier 54 according to a ninth embodiment of the present invention, and FIG. 20 is a cross-sectional view of a vertical mill according to the prior art. Figure 21 is a cross-sectional view of the vertical type E/L'20 of the prior art f-pulling, and Figure 22 is a rosin cross-sectional view for explaining the classification effect of the vertical type E/L'20.
The Rammler diagram, Figure 23, further shows the vertical type E of Ike's prior art.
/I/30 is a sectional view. 41... Tailing, 52... Cone, 53, 8
7... Classification wing, 54... Class IX, 55... Ceiling head, 57... Exhaust means, 59... Air extraction means, 72...
・-Rotation control, 130.1 30a, 130b-v Ikron, 133...Fan, 135...Valve means,]
36...Detection means, 137...Adjustment means 1st (!l, /40 Fig. 4 stone--koτ grain /l Cup Fig. 4 Fig. 5 Fig. stone-1" 316 Fig. 7 Fig. 8rXi No. Fig. 10 Fig. 11 Fig. 12 Fig. 13 j Fig. 14 Fig. 15 Fig. 91r Fig. 16 Fig. 18 Fig. 19 Fig. 20 Fig. 21 Fig. 22

Claims (2)

[Claims] (1) A plurality of classification blades are installed in the circumferential direction below the ceiling plate where the gas and powder particles supplied from below inside the casing containing the classifier collide, and the powder is placed in the radial direction of each classification blade. A discharge means for taking out the granules out of the casing is provided, a bleed means is provided radially outward of the classification blade for taking out the granules out of the casing, and the granules taken out from the discharge means and the bleed means are mixed. A classifier characterized by: (2) In the classifier, a means for adjusting the size of the flow part through which the powder and granular material of the air extraction means flows is provided, and a collecting means for collecting the powder and granular material from the classifier and a collecting means are provided. detection means for detecting the distribution state of the particle size of the collected powder and granular material and outputting a value related to this distribution state; and means for adjusting the output value so that it becomes a predetermined value. The classifier according to claim 1, characterized in that the size of the passage portion is changed by the means for activating and thereby adjusting the size of the passage portion.