• 专利附录
  • 专利说明
  • 权利要求
  • 类似技术
  • 同族专利
  • 引用文献
  • 法律状态
  • 优先权
    • 专利摘要:
    ball agitator mill and process for operating a ball agitator mill the invention relates to a ball agitator mill with a cylindrical grinding container. the grinding container has at least one inlet of the grinding product and at least one outlet of the grinding product. an agitator shaft is arranged in the grinding container, connected with a drive. the agitator shaft transmits part of the drive energy to auxiliary grinding bodies. the auxiliary grinding bodies are distributed loose in the grinding container. in addition, the ball agitator mill has a separation unit coordinated at the outlet of the grinding product, the separation unit being arranged around an axis of rotation, and / or rotating around that axis of rotation. the separation unit consists of at least two components, of which one component is at least a separation device, and a second component is a dynamic element for the production of a material flow.
    公开号:BR112013013770B1
    申请号:R112013013770-3
    申请日:2011-12-01
    公开日:2020-07-14
    发明作者:Horst Pausch；Jan Wolfrum
    申请人:Netzsch-Feinmahltechnik Gmbh；
    IPC主号:
    专利说明:

    [0001] The present invention relates to a separation unit with a dynamic element for ball stirring mills.
    [0002] German patent application DE 10 2007 043 670 A1 discloses a ball agitator mill with a cylindrical grinding vessel, with a stirring shaft connected with a drive in the grinding vessel. The agitator shaft transmits a part of the drive energy to auxiliary grinding bodies, which are arranged loose in the grinding container. Before leaving the grinding product, a spiral-shaped separation device is arranged.
    [0003] The European patent application EP 1 468 739 A1 discloses a horizontal ball agitator mill, which works continuously, which serves for the fine and very fine grinding of a product, with a cylindrical or conical grinding chamber for receiving bodies grinding. At one end of the grinding chamber there is a product outlet that flows into the internal space of the grinding chamber. At the other end of the grinding chamber there is a product outlet that leads out of the internal space. In addition, an agitator, which features several mixing organs and is available coaxial to the axis of the chamber. Prior to the product outlet, a separately activated separation system is provided, which separates the grinding bodies from the ground product, and transports it back into the internal space of the grinding chamber. The separation system is formed by a separation organ, which has two circular discs arranged coaxially to the axis of the chamber. Between the circular discs are arranged several transport elements or wings, symmetrically distributed around the central end of the disc, as well, which lead from the edge of the disc inward. During the operation of the separation device, the wing elements produce a counter pressure on the mixture of and product, such that, due to the centrifugal force and the different specific density, the grinding bodies are separated from the product and are transported back into the internal space.
    [0004] European patent application EP 0 627 262 B1 discloses a ball agitator mill, which works continuously, which serves for the fine and very fine grinding of a product. This ball agitator mill is equipped with a cylindrical or conical grinding chamber, which is used to receive grinding bodies. At one end of the grinding chamber there is an entrance of the grinding product, which opens into the internal space of the grinding chamber. At the other end of the grinding chamber there is an outlet of the grinding product, which leads out of the internal space. In addition, the ball agitator mill has mixing elements and an agitator moves coaxially to the axis of the grinding chamber for the movement of the grinding bodies, the mixing organs being executed in the form of blades or helix, and feature various transport elements. A circular disk is arranged on each side of the transport elements, with at least one of the two disks having at least one central opening. Through the central opening, the mixture formed from the grinding bodies and the product to be ground can pass. The mixing members are designed and dimensioned in such a way that, during the operation of the ball agitator mill, a part of the mixture can continuously flow back to the central opening, through the edge, of the disc that presents the central opening, radially inward. From there, the mixture flows back to the intermediate space between the discs. In this way, a uniform axial distribution of the grinding bodies remains in the internal space of the grinding chamber.
    [0005] The invention has the task of creating a separation unit, with which the discharge of auxiliary grinding bodies from a ball agitator mill can be avoided.
    [0006] The above task is solved by a separation unit in a ball stirring mill, which comprises the characteristics of the present invention. Other advantageous features can be seen from the embodiments.
    [0007] Another task of the invention is to provide a process, with which the discharge of auxiliary grinding bodies from a ball agitator mill can be avoided.
    [0008] This task is solved by a process, which comprises the characteristics of the present invention.
    [0009] A ball agitator mill with a cylindrical grinding container is disclosed. The grinding container has at least one inlet of the grinding product and at least one outlet of the grinding product. An agitator shaft is arranged in the grinding container, connected with a drive. The agitator shaft transmits part of the drive energy to auxiliary grinding bodies. The auxiliary grinding bodies are distributed loose in the grinding container. In addition, the ball stirring mill has a separation unit coordinated at the outlet of the grinding product, the separation unit being arranged around an axis of rotation, and / or rotating around that axis of rotation. The separation unit consists of at least two components, of which one component, at least one separation device, and a second component is a dynamic element, for the production of a material flow. The dynamic element is equipped with channels or wings that pass radially.
    [00010] The rotation axis of the ball stirring mill is equipped with a cage. The dynamic element of the separation unit is arranged with a gap in relation to an end part of the grinding container. The gap between the element and the end part can be adjusted from 0.5 mm to 30 mm. In a preferred embodiment the range is between 2 mm and 15 mm. In addition, the gap in the preferred embodiment can be adjusted axially with respect to the agitator axis. The adjustment of the gap serves to adapt to grinding auxiliary bodies of various sizes.
    [00011] The surface of the dynamic element and the final part of the grinding container are arranged conically, in relation to each other. The angle between the axis of rotation and the surface of the element or between the axis of rotation and the final part is carried out in the range of 5 ° to 85 °. In a preferred embodiment, the angle ranges from 15 ° to 80 °.
    [00012] The value for the ratio of the separation unit length to the agitator shaft length is in the range between 1: 1.1 and 1: 2. Depending on how the separation unit is shaped, the value for the ratio can also be in the range between 1: 1.3 and 1: 1.7.
    [00013] The ratio of the outside diameter of the separation unit to the inside diameter of the cage is situated in a range of values from 1: 1.05 to 1: 2. In addition, the ratio of the outside diameter of the separation device to the outside diameter of the final part of the grinding container is important for the function of the separation unit. This ratio is in a range between 1: 1 and 1: 1.2.
    [00014] The cage is driven by the agitator shaft. In addition, a separate drive may be provided to produce the rotational movement of the separation device. Various forms of execution are possible for the shape of the separation device. The separation device can be a sieve, a sieve cartridge or a spiral. From the state of the art there are many separation devices for agitator ball mills. These known separation devices can be combined in the same way with the dynamic element according to the invention.
    [00015] Furthermore, a process for operating a ball agitator mill with a separation unit according to the invention is disclosed. In this case, a separation unit is used, which consists of at least two components, and at least one separation device is combined with at least one dynamic element to produce a material flow. . Between the exit of the separation unit and its entry there is a circulation of material inside the grinding container. Through the circulation of material, it is no longer possible for auxiliary grinding bodies to enter a gap made through an interval between the dynamic element and the final part of the grinding container. The dynamic element produces a current between the output and the input of the separation unit.
    [00016] The separation device and the dynamic element are actuated among themselves and / or independent of each other, as well as, they are coupled with the agitator axis or decoupled from that axis. Depending on which material is processed in the ball stirring mill, it may be reasonable to adjust different operating states. In this case, it may be reasonable to move the agitator shaft at a different rotational speed than the combination of separation device and dynamic element.
    [00017] The pressure, which is generated by the circulating current, in the passage area to the cage is higher than at the end of the separation unit. Through the rotation movement of the dynamic element, a material flow radially directed from the rotation axis to the agitator axis.
    [00018] Below, examples of execution should clarify the invention and its advantages in detail, with the help of the attached figures. The relations of magnitude of the individual elements to each other in the figures do not always correspond to the relations of magnitude real, since some forms are represented simplified, and other forms are represented enlarged in relation to other elements for the best illustration.
    [00019] FIG. 1 shows the schematic assembly of a ball stirring mill according to the invention, with a spiral-shaped separation device.
    [00020] FIG. 2 shows the schematic assembly of a ball agitator mill according to the invention, the main separation device being a sieve cartridge.
    [00021] Figures 3a and 3b show length and diameter ratios for various configurations of the separation unit.
    [00022] FIG. 4 shows the schematic assembly of a dynamic element.
    [00023] Figures 5 and 6 show schematically possible forms of execution of the dynamic element.
    [00024] Identical reference numbers are used for identical or acting elements of the invention. In addition, for reasons of overview, only the reference numbers are shown in the individual figures, which are necessary for the description of the respective figure.
    [00025] FIG. 1 shows the schematic assembly of a ball stirring mill 20 according to the invention, with a separation unit 30. The ball stirring mill 20 shown consists of a grinding container 22, which is provided with an inlet of the product of grinding 24 and a grinding product outlet 26. In the grinding container 22, a stirring shaft 28 is centrally arranged. Within the stirring shaft 28, the separation unit 30 is arranged. The portion of the stirring shaft 28, which surrounds the separation 30 is designated as cage 44. This cage 44 may have axial recesses 45 or the like, such that through these axial recesses 45, for example, auxiliary grinding bodies may be able to return to the grinding container 22. In the execution example shown in figure 1, the separation device 31 is made in the form of a spiral. A dynamic element 32 for the production of a material flow is coordinated to the separation device 31. The dynamic element 32 is positioned in an interval a of the final part 27 of the grinding container 22. Through the slot 42 defined as interval a, the grinding product can flow between the dynamic element 32 and the final part 27. The material flow it is produced by the rotational movement of the element 32 around the axis of rotation 29.
    [00026] FIG. 2 shows the schematic assembly of a ball agitator mill 20 according to the invention, the separation device 31, 30 being a sieve 44 or a sieve cartridge 44. The separation device 31 is coupled with a dynamic element 32, for the production of a material flow.
    [00027] Figures 3a and 3b show the length and diameter ratios of various configurations of the separation unit. Figure 3a shows a ball stirring mill 20 with a long separating device 31. In turn, figure 3b shows a ball shaker mill 20 with a short separation device 31.
    [00028] In the case of the ball stirring mill 20 shown in fig. 3a, the separation unit 30 is surrounded by the agitator shaft 28. To the separation device 31 with length I ', dynamic element 32 is connected with length I ”. The agitator shaft 28 with a length L is clearly longer than the separation unit 30 with length I. Between the dynamic element 32 and the final part 27, a slot 42 is formed. The width of the slot 42 is determined by the gap a, which depending on the form of execution of the ball agitator mill 20 and can be adapted, according to the size of the auxiliary grinding bodies (not shown). For the function of the separation unit 30, it is important that the dynamic element 32 and the final part 27 are arranged with respect to each other, not only at a defined interval, but also at a defined angle w. In addition, it can be recognized that the inner diameter D of the agitator shaft 28 is minimally larger than the outer diameter d of the separation unit 30. The outer diameter d 'of the end part 27, however, is clearly smaller than the inner diameter D of the agitator shaft 28.
    [00029] FIG. 3b is identical to fig. 3 with the exception of the length of the separation unit 30 and its various components. The length I of the separation unit 30 consists of the length I 'of the separation device 31 and the length I ”the dynamic element 32. In the case of the embodiment shown in Figure 3b, the length L of the agitator shaft 28, however , is less than the length I of the separation unit 30. In addition, the end part 27 is only slightly overlapped by the agitator shaft 28.
    [00030] FIG. 4 shows the schematic assembly of a dynamic element 32 for producing a material flow. The element 32 is mounted in such a way that it passes with rotation symmetry around the axis of rotation 29. The contact side 36 of the element 32 is in effective connection with a separation device (not shown). Through a central hole 33 the grinding product is sucked out of the separation device, and is supplied again through channels 34 radially outwards, in the current direction 37. Through the openings 39 in the effective surface 38 of the element 32 the flow of the grinding product may come out of element 32. The conical shape of the effective surface 38 of element 32 can be clearly recognized. The cross section of the element decreases towards the final part (not shown).
    [00031] Figures 5 and 6 show schematically possible forms of execution of dynamic element 32. Fig. 5 shows a dynamic element 32 in a front view. The channels 34 for producing a material flow pass in an arc-shaped line from the central hole 33 outwards, to the effective surface 38 of the element 32.
    [00032] In fig. 6 another embodiment of a dynamic element 32 is shown. The channels 34 pass from the central hole 33 radially outwards to the effective surface 38. The short channels 35 are covered in the area of the central hole 33 by the material of the element 32. Due to the conical shape of the element 32, these short channels 35 only stand out in the vicinity of the contact side (not shown).
    [00033] The invention has been described with reference to a preferred embodiment. Reference numbers 20 ball agitator mill 22 grinding container 24 grinding product inlet 26 grinding product outlet 27 final part of the grinding container 28 agitator shaft 29 axis of rotation 30 separation unit 31 separation device 32 element for the production of a material flow 33 central hole 34 channels 35 short channels 36 contact side of the element 37 current directions 38 surface of the element 39 openings 42 slot 44 cage 45.recesss distance w angle L length of agitator shaft I length of the unit separation I 'agitator shaft length I ”length of the element d outer diameter of the separation unit d' outer diameter of the end
    权利要求:
    Claims (16)
    [0001]
    1. Ball agitator mill (20) with a cylindrical grinding container (22), which has at least one inlet of the grinding product (24) and at least one outlet of the grinding product (26), while in the container grinding axis (22), an agitator shaft (28) is connected with a drive, agitator shaft (28) which transmits part of the drive energy to auxiliary grinding bodies, the auxiliary grinding bodies being freely distributed in the grinding container (22) and, in addition, the ball agitator mill (20) has a separation unit (30) coordinated at the outlet of the grinding product (26) from the ball agitator mill (20), the unit being The separation unit (30) is arranged around an axis of rotation (29) and / or rotates about that axis of rotation (29), the separation unit (30) consisting of at least two components, of which one component is at least one separating device (31) and a second component is a dynamic element (32) with channels (34) or wings that extend radially to produce a flow of material within the separation unit (30), the dynamic element (32) being disposed between the separation device (31) of the separation unit (30) and an end part (27) of the grinding container (22), characterized by the fact that the dynamic element (32) has a contact side (36) for the separation device (31), a central hole (33), through which the grinding product can be sucked out of the separation device (31), an effective surface (38) made conically with openings (39) and channels (34) made between the hole center (33) and the openings (39), and the cross section of the dynamic element (32) decreases towards the final part (27) of the grinding container (22).
    [0002]
    2. Ball stirring mill (20) according to claim 1, characterized by the fact that the dynamic element (32) is arranged with an interval (a) between the dynamic element (32) and the final part (27) of the grinding container (22), in particular in relation to an end part (27) of the grinding container (22).
    [0003]
    Ball agitator mill (20) according to claim 2, characterized in that the gap (a) can be adjusted from 0.5 mm to 30 mm, preferably from 2 mm to 15 mm.
    [0004]
    Ball agitator mill (20) according to any one of claims 1 to 3, characterized in that a surface (38) of the dynamic element (32) and the final part (27) of the grinding container (22) they are conically arranged in relation to each other.
    [0005]
    Ball agitator mill (20) according to any one of claims 1 to 4, characterized in that the ratio of the length (I) of the separation unit (30) to the length of the agitator shaft (L) is located between 1: 1.1 and 1: 2, preferably between 1: 1.3 and 1: 1.7.
    [0006]
    Ball agitator mill (20) according to any one of claims 1 to 5, characterized in that a part (44) of the agitator shaft (28) surrounds the separation unit (30), the ratio of which outer diameter (d) of the separation unit (30) to the inner diameter (D) of the part (44) of the agitator shaft (28) surrounding the separation unit (30) is situated in a range of 1: 1.05 up to 1: 2.
    [0007]
    Ball agitator mill (20) according to any one of claims 1 to 6, characterized in that the ratio of the outside diameter (d) of the separation unit (30) to the outside diameter (d ') of the part end (27) of the grinding container (22) is in a range between 1: 1 and 1: 1.2.
    [0008]
    Ball agitator mill (20) according to any one of claims 1 to 7, characterized in that the separation device (31) and the dynamic element (32) are coupled with each other and / or are independent from each other, as well as being coupled with the agitator shaft (28) and are operable by the agitator shaft (28) or are decoupled from it and have their own drive.
    [0009]
    Ball agitator mill (20) according to any one of claims 1 to 8, characterized in that the actuation of a part (44) of the agitator shaft (28) that surrounds the separation unit (30) occurs through of the agitator shaft (28).
    [0010]
    Ball agitator mill (20) according to any one of claims 1 to 9, characterized in that a separate drive is provided for producing the rotational movement of the separation unit (30).
    [0011]
    Ball agitator mill (20) according to any one of claims 1 to 10, characterized in that the separation device (31) is a sieve, sieve cartridge or spiral.
    [0012]
    12. Process for operating a ball stirring mill (20), as defined in any one of claims 1 to 11, with a separation unit (30) being used, consisting of at least two components, at least at least one separation device (31) is combined with at least one dynamic element (32), which is arranged between the separation device (31) of the separation unit (30) and an end part (27) of the grinding container ( 22), and through the dynamic element (32), a material flow is produced inside the separation unit (30), so that, between the exit of the separation unit (30) and its entry into the container of grinding (22), a circulation of material occurs, characterized by the fact that the dynamic element (32) has a contact side (36) for the separation device (31), a central hole (33), an effective surface ( 38) made conically with openings (39) and channels (34) made between the central hole (33) and the the openings (39), and the cross section of the dynamic element (32) decreases towards the end part (27) of the grinding container (22), the grinding product being sucked through the central hole (33) of the dynamic element (32) out of the separation device (31) and is carried radially outwardly through the channels (34) of the dynamic element (32).
    [0013]
    Process according to claim 12, characterized in that the flow of grinding product leaves the dynamic element (32) through the openings (39) of the effective surface (38) carried out conically.
    [0014]
    Process according to claim 12 or 13, characterized in that the dynamic element (32) produces a material stream between the outlet and the inlet of the separating device (31), whereby a circulation of material arises, which avoids the penetration of auxiliary grinding bodies into a gap (42) formed by an interval (a) between the dynamic element (32) and the final part (27) of the grinding container (22).
    [0015]
    Process according to any one of claims 12 to 14, characterized in that the separating device (31) and the dynamic element (32) are activated with each other and / or independently of each other, as well as coupled with the agitator shaft (28) or decoupled from it.
    [0016]
    Process according to any one of claims 12 to 15, characterized by the fact that through the rotation movement of the dynamic element (32) a material flow radially directed from the rotation axis (29) to the agitator axis (28) ).
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    法律状态:
    2018-12-18| B06F| Objections, documents and/or translations needed after an examination request according [chapter 6.6 patent gazette]|
    2019-12-03| B06U| Preliminary requirement: requests with searches performed by other patent offices: procedure suspended [chapter 6.21 patent gazette]|
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    优先权:
    申请号 | 申请日 | 专利标题
    DE102010053484.6|2010-12-04|
    DE102010053484A|DE102010053484A1|2010-12-04|2010-12-04|Dynamic element for the separator of a stirred ball mill|
    PCT/DE2011/002060|WO2012083915A2|2010-12-04|2011-12-01|Dynamic element for the separating device of a stirring ball mill|
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