ES2315559T3 - BALL AGITATOR MILL WITH RADIAL AGITATOR. - Google Patents

Abstract

The invention relates to a mill which is provided with an agitator and comprises a grinding chamber containing a grinding medium, a stator and a rotor which are arranged in said grinding chamber, an input opening for material to be ground and an output opening for ground material which are used for bringing the material to be ground to the grinding chamber and for evacuating the ground material therefrom. Said mill also comprises a device for separating the grinding medium arranged in the grinding chamber above the output opening. The inventive grinding chamber, the stator (13, 14, 15) and the rotor (21) thereof together with a separation device (18) can be placed in a tilting position in such a way that said separation device (18) riches a high position which is higher that the major part of the grinding chamber volume.

Description

Ball shaker mill with shaker radial.

The invention is about a ball shaker mill according to the generic term of claim 1.

Such ball agitator mills have a grinding chamber, which contains a grinding body, a stator and a rotor that are arranged in the grinding chamber, an inlet opening of grinding material and an outlet opening of grinding material, for the feeding and unloading of grinding material to, or, of the grinding chamber, as well as a separating device of grinding bodies disposed in the grinding chamber upstream of the outlet opening, which serves to separate from the grinding material grinding bodies dragged with the grinding material, before it is discharged from the grinding compartment through the opening of
exit.

Ball agitator mills are used in the field of food products and particle production  Fine descending to the nano range. In this case, the particles or agglomerates suspended in a liquid are transported to the grinding chamber and the grinding chamber are crushed, respectively they are dispersed, with the help of grinding bodies auxiliaries before they are transported out of the chamber of grinding. So that in this wet grinding the grinding bodies auxiliaries do not crawl out of the ball shaker mill by the liquid stream of grinding material and therefore lose for the ball shaker mill and contaminate the material of grinding, the auxiliary grinding bodies are retained in the grinding chamber by means of a separating device. How separating devices are used separating slots, screens separators or cellular wheels. As auxiliary grinding bodies essentially bodies of steel, glass, ceramic or plastic.

To increase the mechanical capacity of grinding, which is introduced into the grinding material in the chamber grinding, are planned, in ball agitator mills known, spikes on the rotor and / or on the stator that are projected in the grinding compartment. In the operation occurs, by consequently, on the one hand, a contribution to the capacity of grinding, directly, by means of blows between the material of grinding and spikes. On the other hand, a contribution is made additional to milling capacity, indirectly, through of blows between the spikes and the grinding bodies (auxiliary), that creep into the grinding material, and the bumps that then occur again between the grinding material and the bodies grinders Finally, shear forces and forces elongation that act on the grinding material perform also its contribution to the grinding of grinding particles suspended

A mill is known from US 5,590,841 ball stirrer according to the generic term of claim 1, in which a rotor, which is symmetrical in rotation, is arranged in a grinding chamber formed in a complementary manner to it. On the rotor surfaces and on the inner surface of the grinding chamber, that is, the stator surface, are arranged spikes projecting from the respective surface towards the process compartment. But this mill has a complicated construction. Particularly media are required special actuators of grinding bodies for, on the one hand, keep the grinding bodies away from the separating device arranged radially inside and, on the other hand, prevent The grinding material stream reach, from the entrance of grinding material, by means of a "short circuit" the output of grinding material In addition, special channels are required to guarantee the return of the coarse material, separated by the separating device, to the grinding compartment. To prevent that the cylindrical separating device (separating screen or tube with longitudinal grooves), arranged axially, is tied and obture, it can be rotated around its cylindrical axis by a separate drive.

US 5,624,080 describes an agitator mill of balls with a rotor that has several spaced discs axially, which is housed in a shape grinding chamber cylindrical But this mill does not contain spikes on the surface of the rotor and on the surface of the stator, that is, the wall inside of the grinding chamber. Therefore it is not appropriate for introduce mechanical crushing energy with high density of power. To the already relatively large volume of this mill, due to the relatively reduced power density, It must be added that the mill has the capacity of grinding material an external separator device that also It must be operated separately.

The invention aims to obtain, with a rotor / stator geometry, or compartment geometry grinding, pre-specified and at a speed of pre-specified rotor rotation, an effect of increased milling compared to agitator mills known balls.

The objective is achieved through the mills ball stirrers according to claim 1.

Because the rotor has according to the invention essentially the shape of a body with rotation symmetry and the stator is essentially formed by an inner surface complementary to the grinding chamber, it is possible, on the one hand for the mechanical introduction of energy into the grinding material, a high power density, as well as a ratio, so large as possible, between the surface of the process compartment and the volume of the process compartment and, consequently, a optimal cooling of the grinding material during grinding wet, respectively crushing.

Because the rotor and stator present according to the invention spikes distributed over the whole of the surface of each one, which extend from the respective surface and project into the process compartment, it enable direct and indirect spike effects distributed over the entire volume of the grinding compartment, that is to say, the blows between the spikes and the grinding bodies dragged with the grinding material as well as the forces of shear and elongation forces that cause spikes in the suspension composed of grinding material and bodies grinders, which contribute together to the crushing of Suspended particles of grinding material.

In sum, you get, therefore, a better grinding capacity, but at the same time also a homogenization of grinding intensity and, consequently, it is also counteracted throughout the grinding compartment that the grinding material is exposed to hard treatment, for example, by part of a local overheating.

Particularly favorable is that the opening of grinding material inlet is arranged according to the invention in a radially external area of the grinding chamber and the opening Grinding material outlet is arranged in an area radially internal to the grinding chamber. In operation it then fits essentially on the grinding bodies auxiliary, a balance between a centrifugal force component radially directed outward due to rotor rotation around its axis, and a component of directed drag force radially inward, due to the grinding material that It flows radially from the outside in. Material flow Grinding is maintained, for example, by a separate pump. By means of this centrifugal force effect a discharge is achieved "dynamic" of the separator device, which is arranged in radial shape within the outlet area of the grinding material, that is, a large part of the auxiliary grinding bodies floats more or less stationary in radially external areas of the process compartment and forms a "swarm" of bodies auxiliary grinders, through which the material is pumped grinding. The few auxiliary grinding bodies that arrive in this case to the radially internal area of the process compartment is they then catch by the separating device. Therefore, the Separator device takes care and wears less intensely.

The rotor can essentially have the form of a truncated cone, the inlet opening of grinding material in the area of the wide end of the truncated cone and the outlet opening of grinding material in the area of the narrow end of the truncated cone of the grinding chamber. Alternatively, the rotor can also basically have the shape of a doubly truncated cone. In both cases, the material of grinding is preferably pumped, radially out towards radially inside.

As a further alternative, the rotor may have the shape of a cylinder, the inlet opening of the grinding material being arranged in the area of the first end of the cylinder and the outlet opening of the grinding material in the area of the second end of the cylinder of the grinding chamber and the grinding material being transported essentially in a helical manner, through the process compartment, along the cylindrical jacket of the
rotor.

In another favorable conformation, the rotor has essentially the shape of a disk, the opening being arranged of input of the grinding material in the peripheral zone radially external and the outlet opening of the material grinding in the radially internal axial zone of the chamber grinding, so that the grinding material flows again from out inwards through the process compartment. Too here during operation it fits in the grinding bodies auxiliaries, the balance, described above, of a centrifugal force component and a force component of drag Grinding material pumped from outside to inside then again causes the "dynamic" download of separating device arranged radially inside.

It is particularly favorable, if the rotor in disk shape features spikes on both its two surfaces flat disk as on its circumferential surface. The spikes that they are radially more external they have during the running the highest speed of all spikes. Given the, in addition, a large part of the auxiliary grinding bodies floats in radially externally, a substantial part of the effect of grinding takes place only in that peripheral area of the process compartment, so that, compared to a mill ball shaker without spikes on the disc edge, a notable increase in grinding capacity.

Preferably, the grinding chamber can pivot with its stator and rotor and with the separating device to a pivot position such that the separating device it reaches a place that is high, which is preferably louder than a large part of the total chamber volume of grinding. In this way, an extraction of the separating device without unloading auxiliary grinding bodies  or the product, since the loading of auxiliary grinding bodies does not arrives, in the pivot position, at the height of the device separator. In addition, this makes it possible to use in the agitator mill of balls a rotatable separator device with elements in the form of rays or leaves, such as p. ex. spokes wheel, paddle wheel or wheel cell, the separating effect taking place only when it begins to rotate. Due to the possibility of rotation, according to the invention, of the process area, the separating device can be put in this case in operation while the process area is turned over and the Separator device is in the high place. After the put into service, the process area is turned to the position of operation, in which the auxiliary grinding bodies reach the separating device that now acts separating.

When in the pivot position you are in the ball shaker mill, depending on the number of bodies grinders, between 50% and 100% of the entire chamber volume of grinding under the separator device is guaranteed that, due to to the use of a "rotatable" separator device not effective in the state of rest or due to the lack of a detached separator device, do not drop auxiliary grinder body Some of the grinding chamber.

Conveniently, the place turned, which is found elevated, of the separating device, is the highest place possible, attainable by pivot, of the ball agitator mill. This facilitates access to the separator device. Also, in the disassembly of the separator device can be poured or removed without problems auxiliary grinding bodies, which are in or on the separating device, to the grinding chamber by means of the opening to the grinding chamber.

Conveniently, the pivot position is a Non-functioning position of the ball shaker mill. In the operating position of the ball shaker mill, the shaft of rotor rotation is essentially arranged in shape horizontal.

Preferably, the separating device may replace It can be p. ex. a separating screen or a wheel of pallets

In another favorable manufacturing model, the rotor is a hollow rotor with openings arranged radially in the inside the rotor and radially arranged openings in the outer rotor. In this case, the grinding bodies auxiliaries are transported during operation with a part of the flow of grinding material inside the rotor, by means of centrifugal rotor action, from an opening radially arranged inside one of the openings arranged radially outside and outside the rotor are transports with all the flow of grinding material, by means of the pumping action of the feed, from the arranged opening radially outside the opening arranged radially in the inside, so that inside the ball shaker mill a circulation of auxiliary grinding bodies takes place.

Preferably, the opening arranged radially inside it extends in circumferential direction with an internal radius Ri in the rotor and the opening arranged radially outside it extends in circumferential direction with an external radius Ra in the rotor. This facilitates the entrance of auxiliary grinding bodies, together with a part from the flow of grinding material, to the rotor cavity, as well as the output of the auxiliary grinding bodies, along with that part of the flow of grinding material, of the rotor cavity.

According to a manufacturing model particularly Preferably, the hollow rotor has internal channels that form each a fluid connection between an arranged opening radially inside and an opening arranged radially in the outside. These channels arranged inside the rotor in radios form exert a strong centrifugal action on the auxiliary grinding bodies, so that these can be efficiently transported out.

Other advantages, attributes and possibilities of application of the invention are obtained from the description of an example manufacturing, which should not be understood as a limiter, based on drawing attached, being that:

Figure 1 is a perspective view of a ball shaker mill according to the invention in a position of functioning,

Figure 2 is a perspective view of the ball shaker mill of figure 1 in an overturned position of not functioning, or in maintenance position,

Figure 3 is a similar perspective view to that of figure 2 and enlarged ball agitator mill according to the invention with detached separator device,

Figure 4 is a similar perspective view to that of figure 1 of the ball shaker mill according to the invention,

Figure 5 is a perspective view of the ball shaker mill of figure 4 with process zone open,

Figure 6 shows a sectional view of a half of an agitator of a respective manufacturing example of the ball agitator mill according to the invention, the plane being chosen section so that the axis of rotation A-A is within that one,

Figure 7 shows a sectional view of a agitator represented schematically, whose rotor has internal channels and allows a circulation of bodies grinders

Figure 1 shows a ball shaker mill according to the invention in its operating position with horizontal axis of rotor rotation The ball shaker mill is fixed to a vertical element 2 that is connected to a machine base 1. A engine 3 drives by a belt drive 4 a pulley 5 which is connected by a tree in a support 6 (see figure 4), which is arranged under a liner 8, in rotation in solidarity with the rotor 21 (see figure 5) of the agitator mill of balls. Rotor driven rotor 21 rotates in the chamber of grinding 9. The grinding material to be ground comes through a grinding material inlet opening 11, which is arranged radially outside radially in the grinding chamber 9, to the grinding chamber 9 and exits the grinding chamber 9 by an outlet opening of grinding material 12, which it is arranged radially inside axially in the grinding chamber The grinding chamber consists essentially of three pieces, namely a first flat wall of grinding chamber 13, a curved wall of grinding chamber 14 on the perimeter of the grinding chamber and a second flat wall grinding chamber 15. The curved wall of grinding chamber 14 and the second wall flat grinding chamber 15 are fixedly joined one with the Another forming a unit. This unit 14, 15 is coupled by articulation by a hinge 10 to the first flat wall of grinding chamber 13. In addition, the second flat wall chamber of grinding 15 is fixedly connected with a cylindrical sleeve of screening 16, which is arranged protruding centrally and axially out on the grinding chamber wall 15. Inside this screening shirt 16 is a device separator 18 in the form of a cylindrical separating screen (see figure 3). The grinding material outlet opening 12 is formed by a tube, which runs axially, which flows into the inside of the cylindrical separating screen 18. Under the opening  output channel 12 is arranged a gutter 17, which runs obliquely down, with which they can be downloaded in a targeted way from the process area, grinding material and grinding bodies.

Figure 2 shows the ball shaker mill according to the invention of figure 1 with vertical rotor shaft in state tipped over. The reference numbers and the elements that are correspond to those are the same as in figure 1. As see, all functional elements 3 to 17 of the agitator mill of balls in figure 2 are turned 90 ° around an axis of horizontal turn Only machine base 1 and the element vertical 2 are in the same position as in figure 1. In this overturned position, screening shirt 16 is more easily accessible, so that the separating screen 18 (see figure 3) can be disassembled and mounted more easily within the framework of a maintenance. In addition, the auxiliary grinding bodies attached or imprisoned (not shown) to the separating screen may shake or easily peel off in the grinding chamber 9.

Figure 3 shows the ball shaker mill, according to the invention, overturned similarly to figure 2, but something extended. The reference numbers and the elements that are correspond to those are the same as in figure 1 and figure 2. In addition, the separating screen 18 is shown in the disassembled state. As can be recognized in the best way in Figure 3, the screen cylindrical separator 18 has a cylindrical edge top a flange 19 with holes, whereby the sieve separator 18 is fixed, when reassembling, to the jacket screening 16 with screws 20. Disassembly and assembly of the separating screen 18 in the operating position with axis of horizontal rotor rotation (see figure 1) would not be possible without preparation. The contents of the grinding compartment and particularly the grinding bodies should be discharged previously.

In addition, because it can tip over, the mill Ball stirrer according to the invention allows the use, in instead of a "passive" separating screen, of another device separator, such as p. ex. a cell wheel or a paddle wheel, which can only separate auxiliary grinding bodies by being in operating state, that is, in rotation. If you must stop the ball shaker mill equipped with a separator device "active" such, it can be previously turned over to the position vertical with vertical rotation axis. In the new setting in operation proceeds in reverse. First, the rotor and the "active" separator device is rotated with shaft of vertical rotation, with the ball stirrer mill still dump, so that the separating effect of the "active" separator device, after which the mill ball shaker turns back to the horizontal position of Horizontal rotation axis operation.

Figure 4 shows the ball shaker mill, according to the invention, somewhat more expanded than in figure 1. The numbers of reference and the elements that correspond to those are the same as in figure 1, figure 2 and figure 3. In contrast with Figure 1 the coating 8 was omitted here, so that the support 6 of the drive shaft and the 7 support of the rotating machine part.

Figure 5 shows the ball shaker mill of figure 4 with the process area open, that is to say in a state, in which the grinding chamber 9 is open. The camera grinding 9 opened by removing from the wall of grinding chamber 13 by turning, unit 14, 15, 16, which consists of the second flat wall grinding chamber 15, curved wall chamber grinding 14 and screening jacket 16 and which is coupled by articulation by hinge 10 to the first flat wall of grinding chamber 13. The rotor 21 is recognized as a disk, which is screwed in solidarity rotation with the shaft of drive, which is equipped with pins 22 in its zones flat surfaces with additional spikes 23 along the circumferential direction in its curved edge area. In the stator surfaces, that is on the side of the walls of grinding chamber 13 and 15 which gives the process compartment, corresponding spikes are also arranged which are arranged opposite and radially offset with respect to the spikes 22. In the center of the unit 14, 15, 16 removed by turning the separating screen 18 arranged is recognized concentrically inside the screening shirt 16. A particular feature of the ears 26, which are also arranged on the rotor disc 21, but only on its side that gives the grinding chamber wall 15, and thus producing a cleaning turbulence around a separator device static. These screen cleaning spikes, whose length is corresponds approximately to the length of the sieve cylinder  separator, are arranged approximately concentrically around the center of the rotor disc 21 and extend in shape parallel to each other and to the axis of rotation of the rotor, so that when closing the grinding chamber, that is, turning backwards unit 14, 15, 16, are projected in the intermediate space between the separating screen 18 and the screening shirt 16. All grinding chamber wall elements, that is the first flat wall of grinding chamber 13, curved wall of chamber grinding 14 and the second flat wall of grinding chamber 15 as well like screening jacket 16, they have cooling channels (not shown). In the vicinity of the junction points between the screen cleaning pins 26 and rotor disc 21 are holes 27 are found in the rotor disc 21, which are arranged concentrically around the center of the rotor disc 21, through which the two halves of the process compartment

During operation, the product to be ground (eg suspension with particles to be crushed) is pumped through the inlet opening 11 to the grinding chamber 9, in which the rotor disc 21 driven. By the interaction of the bodies grinders (not shown) and pins 22, 23 on the rotor disk 21, just as the pins 24, 25 in the stator are crushed particles suspended in the product. The crushed product and dispersed in that way during its passage from outside to inside to through the process compartment, it finally reaches space intermediate between the separating screen 18 and the screening jacket 16 and passes through the separating screen 18 to the outlet opening 12. If some grinding bodies reach the separating screen, then despite the strong centrifugal field in grinding chamber 9 and at despite the higher density of them, due to blows "unfortunate" and / or due to the drag effect of the flow of grinding material, then they will be retained no later than there. Screen cleaning spikes 26, which circulate, with respect to the separating screen 18 at rest, next to the surface of the latter to the Rotation speed of the rotor, ensure a strong turbulence of the grinding material with speed components that are tangential to the surface of the separating screen. In this way, the separating screen is largely free of deposits and adhesions In addition, lost bodies are prevented between auxiliary grinding bodies are deposited on the separating screen and together with the grinding material, quickly obtain the sieve separator

Figure 6 shows a sectional view of a half of an agitator of a respective manufacturing example of the ball agitator mill according to the invention, the plane being chosen cutting so that the axis of rotation A-A of the agitator is within that. The agitator zone radially internal, close to the axis was removed by sectioning, given that its design is largely independent for the agitator represented in the figure.

The disk-shaped rotor, marked collectively with 21, it contains spikes 22 parallel to the axis, which are adjusted, screwed or otherwise fixed in rotor disc holes 21 parallel to the shaft and to both sides of the rotor disc 21 are projected towards the compartment grinding In addition, on the outer edge of the rotor disc 21 spikes 23 are spaced apart from each other in direction circumferential, which are projected radially outward. He stator, or the grinding compartment housing is formed by the first flat wall of grinding chamber 13, the wall curved grinding chamber 14, as well as by the second wall grinding chamber flat 15 (compare figure 5). Both flat walls of grinding chamber 13 and 15 have pins 24, respectively 25, which project into the compartment of grinding, which are arranged in displaced form with with respect to the pins 22 of the rotor disk 21. The pins 23 radial, which are arranged on the outer edge of the disk of rotor 21 provide an essential contribution to all capacity of grinding, since both the spikes 23 and the material of grinding present particularly high speeds in this radially external area, so that there takes place a particularly high energy demand between the pins 23 and the grinding material, or the grinding bodies auxiliary The so-called grinding chamber walls 13, 14 and 15 they have coatings 28, 29, or 30, which are found in side of the grinding compartment, which are composed of a abrasion resistant material. The spikes 22, 23, 24 and 25, which They are also subject to heavy wear, replaceable ideally. The flat wall of grinding chamber 15 presents in its side facing the axis of rotation A-A the screening shirt 16 shown only partially, which covers the separating screen 18 (compare with figure 5).

Figure 7 shows a sectional view of a agitator represented schematically, whose rotor has internal channels and allows a circulation of grinding bodies to along the drawn arrows. In order to maintain the clarity the pins 22, 23, 24 and 25 were omitted in figure 7 according to the invention shown in figure 6 and figure 6. The rotor collectively marked with 21 has a radial distance Ri of the axis of rotation A-A at least one opening 21a radially internal and at a radial distance Ra from the axis of rotation A-A at least one radially external opening 21b. Between these openings 21a and 21b exists through channels 21c in the inside the rotor 21 a flow channel. The stator is formed by grinding chamber walls 13, 14 and 15 (compare figure 5). During operation both drag and pull forces act inertia forces on grinding bodies (represented as black dots) distributed in the grinding material. In the zone of the grinding compartment between the rotor 21 and the walls of grinding chamber 13 and 15, which form the stator, the bodies grinders crawl radially inward, along with the grinding material pumped in from radially out to the grinding compartment through the inlet opening of grinding material 11 (compare figure 1, figure 5), a through the channels formed by 13 and 21, respectively by 13 and 15, since the drag forces of the material flow of grinding on grinding bodies, which are oriented radially inward, they are greater than centrifugal forces, that are oriented radially outward of the bodies grinders on their curved paths. On the channels ("centrifugal channels") 21c of rotor 21, the conditions are exactly inverse during operation. For the material of milling projected radially out acting here forces of drag directed outward, along with centrifugal forces also directed outwards, on the grinding bodies, so that these crawl radially out. Therefore, the grinding bodies that invariably reach the area radially internal grinding compartment are transported out again. This prevents them from being deposited. grinding bodies on the separating device (not shown) arranged radially inside, thus providing a plug of the separating device, excessive wear of the compartment of grinding and an overheating of the grinding material in the radially internal area of the grinding compartment.

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List of reference marks

one

machine base

2

vertical element

3

engine

4

belt drive

5

pulley

6

drive shaft support

7

rotatable machine part support

8

coating

9

grinding chamber

10

hinge

eleven

material inlet opening grinding

12

material outlet opening grinding

13

first flat wall grinding chamber

14

curved wall of perimeter grinding chamber grinding chamber

fifteen

second flat wall grinding chamber

16

screening shirt

17

gutter

18

separating device, separating screen

19

flange

twenty

screws

twenty-one

rotor disk

21st

radially internal opening

21b

radially external opening

21c

channels

22

spike on disk plane

2. 3

spike on disc edge

24

spike on the stator

25

spike on the stator

26

screen cleaning spike

27

junction holes

28

coating

29

coating

30

coating

Claims (18)

1. Ball agitator mill with a grinding chamber, containing grinding bodies, a stator and a rotor that are arranged in the grinding chamber, an inlet opening of grinding material and an outlet opening of grinding material for feeding and unloading of grinding material to, or, of the grinding chamber, as well as a separating device of grinding bodies, which is arranged in the grinding chamber upstream of the outlet opening, which serves to separate the bodies grinders carried by the grinding material before it is discharged from the grinding compartment through the outlet opening, the rotor (21) having the shape of a body with rotational symmetry and the stator (13, 14, being formed), 15) by an internal surface, which is essentially complementary with respect to the surface of the rotor, of the grinding chamber (9), and presenting the rotor (21) and the stator (13, 14, 15) spikes ( 22, 23, 24, 25) that extend from the respective surface and project into the process compartment, characterized in that the grinding material inlet opening (11) is arranged in a radially external area of the grinding chamber ( 9) and the outlet opening of the grinding chamber (12) in a radially internal area of the grinding chamber (9), and because the pins (22, 23, 24 and 25) are arranged in a distributed manner over all the respective surfaces of the rotor (21) and the stator (13, 14, 15). 2. Ball agitator mill according to claim 1, characterized in that the rotor is essentially in the form of a truncated cone, the inlet opening of grinding material being arranged in the area of the wide end of the truncated cone and the outlet opening of grinding material in the area of the narrow end of the truncated cone of the grinding chamber. 3. Ball agitator mill according to claim 1, characterized in that the rotor is essentially in the form of a doubly truncated cone, the inlet opening of grinding material being arranged in the area of the wide end of the truncated cone and the outlet opening of grinding material in the area of the narrow end of the truncated cone of the grinding chamber. 4. Ball agitator mill according to claim 1, characterized in that the rotor is essentially in the form of a disk (21), the inlet opening of grinding material (11) being arranged in the peripheral area radially located in the outside and the outlet opening of grinding material (12) in the axial zone, which is located radially inside. 5. Ball agitator mill according to claim 4, characterized in that the disk (21) has spikes (22, 23) on its two flat surfaces of disk and / or on its circumferential surface. 6. Ball agitator mill according to one of the preceding claims, characterized in that the grinding chamber (9) can be pivoted with its stator (13, 14, 15) and its rotor (21) and its separating device (18) at a pivot position such that the separating device (18) reaches a place that is high, which is higher than a large part of the volume of the grinding chamber. 7. Ball agitator mill according to claim 6, characterized in that the pivoting position is a non-operating position of the ball agitator mill. 8. Ball agitator mill according to claims 6 or 7, characterized in that, in the operating position of the ball agitator mill, the axis of rotation of the rotor is arranged essentially horizontally. 9. Ball agitator mill according to one of claims 6 to 7, characterized in that, in the non-operating position, the axis of rotation of the rotor is arranged essentially vertically. 10. Ball agitator mill according to one of claims 6 to 9, characterized in that most of the volume of the grinding chamber occupies between 50% and 100% of the total volume of the grinding chamber. 11. Ball agitator mill according to one of claims 6 to 10, characterized in that the place, which is high, of the separating device (18) is the highest possible place, which can be reached by pivoting, of the separating device. 12. Ball agitator mill according to one of the preceding claims, characterized in that the separating device (18) is replaceable. 13. Ball agitator mill according to one of the preceding claims, characterized in that the separating device (18) is a self-cleaning separating screen (26). 14. Ball agitator mill according to one of claims 1 to 12, characterized in that the separating device is a vane wheel. 15. Ball agitator mill according to one of claims 1 to 12, characterized in that the separating device is a separating slot. 16. Ball agitator mill according to one of claims 1 to 15, characterized in that the rotor (21) is a hollow rotor with at least one opening (21a) radially disposed inside the rotor (21) and at least one opening (21b) arranged radially on the outside of the rotor (21), the auxiliary grinding bodies being transported in operation with a part of the flow of grinding material inside the rotor (21), by means of the centrifugal action of the rotor (21 ), from an opening (21a) arranged radially inside to an opening (21b) arranged radially outside and transporting them outside the rotor (21) with all the flow of grinding material, by means of the pumping action of the feeding of grinding material, from the opening (21b) arranged radially outside, to the opening (21a) arranged radially inside, so that a circulation of auxiliary grinding bodies takes place inside l ball shaker mill. 17. Ball agitator mill according to claim 16, characterized in that the openings (21a) arranged radially inside extend in a circumferential direction with an internal radius Ri in the rotor (21) and the openings (21b) arranged radially in the outer extend in circumferential direction with an external radius Ra in the rotor (21). 18. Ball agitator mill according to claims 16 or 17, characterized in that the hollow rotor (21) has internal channels (21c), which each form a flow channel between at least one of the radially arranged openings (21a) inside and at least one of the openings (21b) arranged radially outside.