EP3398685B1 - Dispositif pour broyage de produit - Google Patents

Dispositif pour broyage de produit Download PDF

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Publication number
EP3398685B1
EP3398685B1 EP17001798.2A EP17001798A EP3398685B1 EP 3398685 B1 EP3398685 B1 EP 3398685B1 EP 17001798 A EP17001798 A EP 17001798A EP 3398685 B1 EP3398685 B1 EP 3398685B1
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EP
European Patent Office
Prior art keywords
grinding
grinding container
container
annular space
sieve
Prior art date
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Application number
EP17001798.2A
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German (de)
English (en)
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EP3398685A1 (fr
Inventor
Harald Oberholz
Wolfgang Lautenbach
Michael Zendel
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Mairec Edelmetallgesellschaft Mbh
Original Assignee
Mairec Edelmetallgesellschaft Mbh
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Publication of EP3398685A1 publication Critical patent/EP3398685A1/fr
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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B02—CRUSHING, PULVERISING, OR DISINTEGRATING; PREPARATORY TREATMENT OF GRAIN FOR MILLING
    • B02C—CRUSHING, PULVERISING, OR DISINTEGRATING IN GENERAL; MILLING GRAIN
    • B02C17/00—Disintegrating by tumbling mills, i.e. mills having a container charged with the material to be disintegrated with or without special disintegrating members such as pebbles or balls
    • B02C17/18—Details
    • B02C17/181—Bearings specially adapted for tumbling mills
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B02—CRUSHING, PULVERISING, OR DISINTEGRATING; PREPARATORY TREATMENT OF GRAIN FOR MILLING
    • B02C—CRUSHING, PULVERISING, OR DISINTEGRATING IN GENERAL; MILLING GRAIN
    • B02C17/00—Disintegrating by tumbling mills, i.e. mills having a container charged with the material to be disintegrated with or without special disintegrating members such as pebbles or balls
    • B02C17/04—Disintegrating by tumbling mills, i.e. mills having a container charged with the material to be disintegrated with or without special disintegrating members such as pebbles or balls with unperforated container
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B02—CRUSHING, PULVERISING, OR DISINTEGRATING; PREPARATORY TREATMENT OF GRAIN FOR MILLING
    • B02C—CRUSHING, PULVERISING, OR DISINTEGRATING IN GENERAL; MILLING GRAIN
    • B02C17/00—Disintegrating by tumbling mills, i.e. mills having a container charged with the material to be disintegrated with or without special disintegrating members such as pebbles or balls
    • B02C17/04—Disintegrating by tumbling mills, i.e. mills having a container charged with the material to be disintegrated with or without special disintegrating members such as pebbles or balls with unperforated container
    • B02C17/06—Disintegrating by tumbling mills, i.e. mills having a container charged with the material to be disintegrated with or without special disintegrating members such as pebbles or balls with unperforated container with several compartments
    • B02C17/07—Disintegrating by tumbling mills, i.e. mills having a container charged with the material to be disintegrated with or without special disintegrating members such as pebbles or balls with unperforated container with several compartments in radial arrangement
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B02—CRUSHING, PULVERISING, OR DISINTEGRATING; PREPARATORY TREATMENT OF GRAIN FOR MILLING
    • B02C—CRUSHING, PULVERISING, OR DISINTEGRATING IN GENERAL; MILLING GRAIN
    • B02C17/00—Disintegrating by tumbling mills, i.e. mills having a container charged with the material to be disintegrated with or without special disintegrating members such as pebbles or balls
    • B02C17/10—Disintegrating by tumbling mills, i.e. mills having a container charged with the material to be disintegrated with or without special disintegrating members such as pebbles or balls with one or a few disintegrating members arranged in the container
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B02—CRUSHING, PULVERISING, OR DISINTEGRATING; PREPARATORY TREATMENT OF GRAIN FOR MILLING
    • B02C—CRUSHING, PULVERISING, OR DISINTEGRATING IN GENERAL; MILLING GRAIN
    • B02C17/00—Disintegrating by tumbling mills, i.e. mills having a container charged with the material to be disintegrated with or without special disintegrating members such as pebbles or balls
    • B02C17/18—Details
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B02—CRUSHING, PULVERISING, OR DISINTEGRATING; PREPARATORY TREATMENT OF GRAIN FOR MILLING
    • B02C—CRUSHING, PULVERISING, OR DISINTEGRATING IN GENERAL; MILLING GRAIN
    • B02C17/00—Disintegrating by tumbling mills, i.e. mills having a container charged with the material to be disintegrated with or without special disintegrating members such as pebbles or balls
    • B02C17/18—Details
    • B02C17/24—Driving mechanisms

Definitions

  • the invention relates to a device for comminuting regrind with a grinding container which has axially opposite end faces, between which at least one sieve shell extends which, together with another sieve dish or an outer wall likewise extending between the end faces, defines at least one annular space, wherein the or an innermost sieve bowl delimits a grinding chamber, in which grinding elements are arranged, with a bearing for rotatably holding the grinding container on a foundation and with drive means for rotating the grinding container about a horizontal axis in a grinding direction.
  • the known device has a grinding container which is rotatably mounted about a horizontal axis.
  • the grinding container is cylindrical in shape and has two end faces which are circular in a plan view and which are each connected in the center to a pipe socket which opens into the grinding container, so that regrind can be introduced into or removed from the painting container via the respective pipe socket.
  • Each pipe socket is rotatably held on a foundation by a pivot bearing.
  • Several concentrically arranged sieve shells extend between the end faces, each of which is designed as a cylindrical wall with openings of constant size. The spaces between the sieve shells are referred to here as annular spaces.
  • the size of the sieve shell openings decreases from sieve shell to sieve shell, the outermost sieve shell finally being designed as a fine-pored mesh sieve.
  • the innermost sieve bowl is mechanically stable and surrounds an inner grinding chamber in which grinding media weighing around ten kilograms are arranged.
  • One of the pipe sockets of the grinding container is connected to an electric motor that rotates the grinding container around the horizontal axis.
  • the regrind introduced through the other pipe socket is removed from the grinding media in the grinding chamber smashed.
  • Sufficiently finely ground ground material finally penetrates the outermost sieve bowl and reaches an execution funnel set up below the grinding drum.
  • the EP 2 907 577 A1 discloses a ball mill, which also has a cylindrical grinding drum with pipe sockets on its end faces.
  • the grinding drum is rotatably held on its pipe socket by a rotary bearing.
  • the ball mill disclosed there is used for grinding liquid-solid mixtures and is designed for continuous operation.
  • a circular sieve plate is arranged in the grinding drum, which extends parallel to the end faces.
  • the grinding drum is equipped with driver strips which, when the grinding drum rotates, transfer the material to be ground from an inlet pipe socket through the sieve plate to the other pipe socket, which serves as an outlet pipe socket.
  • the DE 236 635 C. relates to a drum ball mill with a grinding drum, in which a perforated inner drum extends.
  • the grinding drum also has two end faces, between which a further perforated inner end wall is arranged.
  • An insertion or discharge chute is provided for the introduction and discharge of material.
  • the US 3,371,547 A discloses a drive for a drum for powdering objects.
  • a drive with rollers is provided which are driven by a motor 3 via a coupling 5.
  • the drum rests on these rollers.
  • the DE 19 12 860 shows such a roller drive for a grinding drum.
  • the grinding drum extends through two races that rest on the driven rollers.
  • a device of the type mentioned at the beginning which is also referred to as a sieve ball mill, has been used for many years for grinding ground material, for example slag residues from incineration plants or dismantled furnace linings made of refractory bricks.
  • the comminution of such furnace residues has proven to be particularly useful from an economic point of view if the slag or fireclay stones contain precious metals such as copper, gold or silver.
  • Such a screen ball mill is also used for crushing the interior of catalytic converters for motor vehicles.
  • the device mentioned at the outset has the disadvantage that the grinding container is not accessible from the outside.
  • the grinding bowl and especially the inner sieve bowl are exposed to heavy wear due to the heavy grinding media.
  • a maintenance opening in the grinding container itself would therefore result in an undesirable structural weakening of the grinding container.
  • the opening would also have to pass through at least one inner sieve shell, which creates further difficulties.
  • An opening on one of the end faces of the grinding container is also not possible, since the rotary bearing is arranged there for rotatably holding the end pipe socket. Due to the lack of accessibility, it is not possible to monitor the progress of the shredding process by simply inspecting it. Furthermore, blockages or damage caused by residues inside the grinding container are not recognized or are recognized only at a late stage. The removal of the residues is also complex.
  • the object of the invention is therefore to provide a device of the type mentioned that can be easily monitored and serviced.
  • the bearing has rotatably fastened rollers and the grinding container rests on the rollers, a maintenance opening being formed on at least one end face, which provides an insight into the Grinding container enables, the end faces are designed as end plates and each delimit a cavity which is connected to the grinding container via an inlet opening and equipped with conveying means for discharging regrind from an outlet opening.
  • the pivot bearing is realized by rollers, which are arranged, for example, rotatably in the foundation.
  • the grinding container lies on the rollers.
  • Extensive rotary bearings on the end faces of the grinding container have become unnecessary according to the invention.
  • the maintenance opening is expediently so large that residues can easily be removed from the grinding container through the maintenance opening.
  • residues are, for example, non-crushable sheets or the like. If such residues have settled in the grinding container, they can be removed simply and quickly through the maintenance opening from the grinding container and in particular from the grinding chamber within the scope of the invention. Long downtimes due to maintenance work are thus avoided within the scope of the invention.
  • the inspection also enables blockages in the openings of the innermost sieve shell to be quickly recognized and removed if necessary.
  • the condition of the grinding media can also be easily monitored, so that damaged grinding media can be replaced before major damage occurs.
  • it can also be recognized whether a grinding process has lasted sufficiently long to shred the ground material to the desired extent.
  • Spherical grinding bodies and particularly grinding balls which are made of steel are preferred as grinding media.
  • differently shaped grinding media and / or materials can also be used within the scope of the invention.
  • the end faces are designed as end disks and each delimit a cavity which is connected to the grinding container via an inlet opening.
  • the end disks are preferably ring-shaped and have an outer contour that is circular in an end view.
  • the thickness of the end disks is preferably between 10 cm and 50 cm, the cavity being formed in the radially outer region of the end disks.
  • the maintenance opening is provided in the center or the center of at least one end plate.
  • the cavity is connected to the grinding container via the inlet opening.
  • the cavity of each end plate is equipped with an outlet opening which faces away from the grinding container and through which the ground material can be removed again from the cavity.
  • conveying means for example appropriately curved driver strips, which are connected to the inner wall of the cavity of the end disks, or guide channels are formed, which transport the regrind from the inlet opening to the outlet opening, from where the regrind arrives in suitable further processing units.
  • at least two sieve shells and preferably three sieve shells are provided, which also extend between the end faces.
  • the sieve shells are hollow cylindrical and are arranged concentrically to one another. With the exception of an outermost sieve bowl, all sieve bowls have discharge openings, which are slightly larger than the openings of the respective sieve bowl and allow regrind to fall back into the grinding chamber.
  • a driving element is provided, which is arranged in the immediate vicinity of the drop opening and is connected to the rotatable grinding container in a rotationally fixed manner.
  • the contour of the maintenance opening is basically arbitrary.
  • the maintenance opening is advantageously of rectangular design, the height and width of the rectangle each varying between 20 cm and 70 cm. Deviating from this, the maintenance opening is circular, its diameter varying between 20 cm and 70 cm.
  • a maintenance flap is advantageously provided, which is set up for quickly opening and closing the maintenance opening.
  • the maintenance flap is hinged to the front, for example. It can also consist of a transparent material, so that a continuous view of the grinding container is possible.
  • the wear of the device according to the invention is reduced.
  • the operation of the device can be made more effective, so that, in comparison with a device according to the prior art, a greater yield of separated, completely ground regrind can be achieved according to the invention.
  • the device according to the invention is preferably used for the recovery or, in other words, recycling of precious metals.
  • the noble metals are contained, for example, in electrical waste, furnace linings, catalysts or the like.
  • This raw ground material is introduced into the grinding container, for example through a loading opening provided in one of the end faces. This is done in batches, for example, in batches. In a different embodiment of the invention, however, continuous operation of the device according to the invention is also possible.
  • the grinding container rotates, the grinding media break up the ground material. Grist with a sufficiently small grain size penetrates through the sieve bowls and is finally discharged from the grinding container.
  • a commercially available electric motor is suitable as the drive means, for example.
  • the electric motor advantageously drives at least one of the rollers on which the grinding container rests.
  • the grinding container is thus set in a rotational movement about the horizontal axis.
  • the horizontal axis expediently runs through the center of the preferably circular end faces.
  • the sieve trays usually have openings that allow ground material with a sufficiently small grain size to pass through.
  • the openings of a sieve bowl are preferably all of the same size. However, as the distance between the sieve shell and the horizontal axis increases, i.e. towards the outside, the openings from the sieve shell to the sliding shell become smaller.
  • the outside of the grinding container is delimited by an outer wall which also extends between the end faces and has no openings. The outer wall delimits an outer annular space with the adjacent, radially inner sieve shell, which has the smallest openings.
  • the bearing comprises four rollers.
  • Four rollers enable an optimal weight distribution of the preferably hollow cylindrical grinding container and therefore a particularly low-maintenance rotation.
  • the bearing has at least two axes of rotation extending in the axial direction, each of which is connected in a rotationally fixed manner to rollers, the axes of rotation being arranged on different sides of the grinding container.
  • the rollers which are connected to the same axis of rotation, are coupled to one another. This mechanical coupling of the rollers further increases the mechanical stability of the device.
  • roller used here is intended to encompass all rotatably mounted means with a circular outer contour.
  • each roller on the outside, with which it rests on the grinding container has a material for increasing the friction between the roller and the grinding container.
  • the material is, for example, an elastomer, a rubber or the like.
  • a role can also consist of several individual roles and can be designed, for example, as a pair of roles.
  • the cavity of a discharge end disk is connected to a first annular space via the inlet opening and the cavity of a loading end disk is connected to a second annular space.
  • a first annular space has coarse conveying means which, when the grinding container rotates in a discharge direction which is opposite to the grinding direction, transfer ground material into the cavity of the discharge end disk.
  • Another annular space which is preferably located radially further out and which is connected to a loading end disk is equipped with fine conveying means which, when the grinding container rotates in the grinding direction, transfer ground material into the cavity of the loading end disk.
  • a user of the device according to the invention can reverse the rotation of the grinding container, whereupon less comminuted regrind, for example from the first or innermost annular space, passes over the discharge end disk is carried out outside.
  • the roles of the end disks can of course also be exchanged, so that the fine regrind is guided over the end disk which is opposite the loading end disk via which the regrind is introduced into the grinding chamber.
  • the only roughly ground material would then be discharged at the loading end plate.
  • the cavity of the loading end plate would be connected to the first or innermost annular space via the inlet opening, the inlet opening of the opposite end plate forming an inlet opening in the outermost annular space.
  • the funding in the ring and cavities would have to be adjusted accordingly.
  • the first inner ring space therefore, has coarse conveying means which, when the grinding container rotates in the grinding direction, transfers ground material into the cavity of the discharge end disk
  • another ring space which is preferably further out has fine conveying means which, when the grinding container rotates in the grinding direction Transfer the regrind into the cavity of the loading end plate.
  • the inlet opening of the cavity of the discharge end disk can be closed by means of a flap which can be actuated from the outside.
  • the grinding container can be rotated in only one direction.
  • the ground material is first brought into the grinding chamber and the grinding container is set in rotation.
  • the flap of the inlet opening of the discharge end plate initially remains closed, so that the simultaneous discharge of coarse and fine ground material from the discharge end plate is avoided.
  • the flap is provided with openings which correspond to the openings in the outermost sieve shell. Finely chopped regrind can then be picked up on both end plates with the flap closed. If the output of fine regrind decays significantly, the flap can be opened from the outside, so that the coarse regrind is now discharged from the grinding container via the discharge end disk. In this variant, too, the roles or the function of the end disks can be interchanged so that the coarse regrind is discharged from the loading end disk.
  • an end plate has a central loading opening which is set up for feeding regrind into the grinding chamber.
  • only one of the end plates is equipped with a maintenance opening.
  • the other end plate, the loading end plate has a loading opening that is used to feed the material to be ground into the grinding chamber.
  • the feeding can take place, for example, with the aid of suitable feeding means.
  • the feed means can be designed to be pivotable so that, if necessary, the loading opening can also be used as a maintenance opening.
  • the grinding container advantageously lies only on its end disks on the rollers. With their radial outer sides, the end disks therefore form raceways on which the rollers roll. According to this advantageous further development, the section of the grinding container that extends between the mechanically stable end disks, that is to say the sieve shells with the exception of the innermost sieve shell, and the outer wall can be made less mechanically strong. In this way, the manufacture of the device according to the invention is simplified, which results in a further cost advantage.
  • the sieve shells advantageously each form openings of constant size, the size of the opening decreasing in the radial direction from the sieve shell to the sieve shell.
  • the outer wall has no openings. According to this advantageous further development, the grain size in the outermost annular space is significantly smaller than in the annular space or the radial inner space.
  • FIG. 1 shows an embodiment of the device 1 according to the prior art.
  • the device 1 has a cylindrical grinding drum 2 which is set up for rotation about a horizontal axis 3.
  • the grinding drum 2 has an input face 4 and an output face 5.
  • an input pipe socket 9 is provided, which delimits a loading opening 10.
  • An outlet pipe socket 11 is provided in the middle of the outlet end face 5.
  • a pivot bearing 12, which comprises two pivot bearing supports 13, is used to hold the inlet pipe socket 9 and the outlet pipe socket 11.
  • the pivot bearing supports 13 hold the grinding drum 2 rotatably on the pipe sockets 9 and 11 on a foundation 14.
  • An electric motor 15 is provided for driving the grinding drum 2 and is connected to the output pipe socket 11.
  • the grinding drum 2 is arranged in a housing made of sheet metal, of which in Figure 1 just a lower case funnel 16 is shown.
  • Each sieve bowl 6, 7 and 8 has identical openings, for example in the form of slots, bores or meshes, which are designed for the passage of grains of a certain size. The size of these openings decreases from sieve dish to sieve dish from the inside to the outside.
  • the openings of the innermost sieve shell 6 are arranged for the passage of granules with a size of 20 mm, the intermediate sieve shell 7 for the passage of granules with a size of 5 mm and the fine sieve shell 8 for the passage of grain sizes of 1 mm.
  • the innermost sieve bowl 6 is mechanically stable. It delimits a grinding chamber 17 in which grinding media 18 are arranged.
  • the intermediate sieve shell 7 and in particular the fine sieve shell 8 have a lower mechanical strength than the innermost sieve shell 6.
  • Grist not shown in the figure, is introduced into the grinding chamber through the feed opening 10.
  • the electric motor 15 sets the grinding drum 2 in rotation, as a result of which the grinding bodies 18 comminute the ground material in the grinding chamber 17. Uncrushed ground material remains in the grinding chamber 17.
  • a forced entrainment element (not shown in the figure) is arranged in the form of a longitudinal bar, which likewise delimits or in other words closes the respective annular space.
  • the forced entrainment element is connected in a rotationally fixed manner to the grinding container 2 and thus rotates during operation of the device 1. In this way, ground material is taken along by the forced entrainment element with each revolution of the grinding container.
  • the sieve shells 6 and 7 do not completely surround the annular spaces. Rather, each sieve bowl 6, 7 has recoil openings just before the force-taking element, which are somewhat larger than the openings of the sieve bowls 6, 7. In this way, regrind that has not fallen through the sieve shells 6 or 7 returns to the grinding chamber 17 and is comminuted again by the grinding bodies 18.
  • Finely ground material finally passes through the fine screen bowl 8 and is discharged via the housing funnel 16 for further processing.
  • the grinding container of the previously known device is not accessible from the outside.
  • the shredding process cannot therefore be monitored by simply looking into the grinding container. This can result in the shredding being too short or longer than necessary.
  • the yield of sufficiently finely ground and discharged regrind is reduced within a predetermined period. Furthermore, blockages or damage to the inside of the grinding container are not recognized, or only very late.
  • FIG. 2 shows an exemplary embodiment of the device 19 according to the invention, which also has a grinding container 2.
  • the end faces of the device according to the invention are designed as end disks, which are referred to here as loading end disk 20 or discharge end disk 21 with reference to the material guide.
  • Said end disks 20 and 21 each define a cavity 22 in their interior, which has an outlet opening 23 and 24 on its side facing away from the grinding chamber 17.
  • the outlet opening 23 of the loading end plate 20 surrounds a circular loading opening 10 in a ring shape.
  • the outlet opening 24 of the discharge end disk 21 is guided around a maintenance opening 25 which is arranged centrally in the discharge end disk 21 and which can be closed by a maintenance flap 26.
  • An innermost sieve bowl 6, an intermediate sieve bowl 7 and a fine sieve bowl 8 extend between the loading end disk 20 and the discharge end disk 21.
  • the innermost sieve bowl is designed to be sufficiently thick to provide the necessary mechanical strength for the grinding chamber 17 in which the approximately ten kilogram grinding media 18 are arranged.
  • Each sieve bowl 6, 7 and 8 again has uniform openings, for example in the form of slots, bores or meshes, which are designed for the passage of grains of a certain size. The size of these openings again decreases from sieve dish to sieve dish from the inside to the outside.
  • the openings of the innermost sieve shell 6 are arranged for the passage of granules with a size of 20 mm, the intermediate sieve shell 7 for the passage of granules with a size of 5 mm and the fine sieve shell 8 for the passage of grain sizes of 1 mm.
  • An outer wall 38 has no openings and serves as an outer housing which closes off the grinding container 2 from the outside.
  • a first annular space 27 is defined between the innermost sieve shell 6 and the intermediate sieve shell 7.
  • the intermediate sieve shell 7 and the fine sieve shell 8 delimit a second annular space 28.
  • a third annular space 29 extends between the fine sieve shell 8 and the outer wall 38.
  • the loading end plate 20 has an input opening 30 which connects the third annular space 29 with its cavity 22.
  • the discharge end disk 21 delimits an inlet opening 31, which connects the cavity 22 formed by it to the first annular space 27.
  • a forced entrainment element is arranged, for example in the form of a longitudinal bar, which likewise delimits the annular space 27, 28, or closes it in other words.
  • the forced entrainment element is connected in a rotationally fixed manner to the grinding container 2 and thus rotates during operation of the device 19. In this way, ground material is carried along by the forced entrainment element with each revolution of the grinding container.
  • the sieve shells 6 and 7 do not fully limit the annular spaces 27, 28. Rather, the sieve shells 6, 7 have recoil openings just before the force-taking element, which are somewhat larger than the openings of the sieve shells 6, 7. Regrind that is not by the Sieve bowls 6 or 7 has fallen back into the grinding chamber 17 in this way and is crushed again by the grinding bodies 18.
  • conveying means In the third annular space 29 conveying means, not shown in the figures, are arranged which, when the grinding container 2 rotates in one grinding direction, convey ground material which has entered the third annular space 29 to the inlet opening 30 of the cavity 22 of the loading end disk 20.
  • the cavity 22 is also equipped with conveying means which transfer the ground material to the outlet opening 23. From there, the ground material arrives in a drop channel 32 and can be processed further.
  • Funds are designed for example as driver bars, channels or the like.
  • the conveying means of the first annular space 27 convey the regrind into the cavity 22 of the discharge end disk 21.
  • the less comminuted regrind is then arranged in the cavity 22 of the output disk 21 and during rotation in the discharge direction also effective conveying means transported to the outlet opening 24, from where it falls into a discharge funnel 33.
  • the device 19 has a rotary bearing 12 which differs from the device 1 and which has rollers 34 which, in the exemplary embodiment shown, are connected to one another via an axis of rotation 35 are.
  • a rotary bearing 12 which differs from the device 1 and which has rollers 34 which, in the exemplary embodiment shown, are connected to one another via an axis of rotation 35 are.
  • rollers 34 which, in the exemplary embodiment shown, are connected to one another via an axis of rotation 35 are.
  • Figure 2 only one axis of rotation 35 with two rollers 34 can be seen. This is arranged on the front of the grinding container 2. However, a further axis of rotation is arranged on the rear side, ie exactly in alignment with the axis of rotation 35 shown, which is therefore not shown in the figures.
  • the second axis of rotation points also two non-rotatably connected roles.
  • a total of four rollers are thus provided on which the grinding container 2 rests with its loading end plate 20 and its discharge end plate 21.
  • One of the axes of rotation 35 is driven by an electric motor 15 as a drive means for rotation.
  • the drive means can also have chains, sprockets or the like which act directly on the grinding drum.
  • guide rollers 37 are provided which are arranged with play relative to the respective end plate 20 or 21.
  • the ground material is introduced into the grinding chamber 17 via the loading opening 10.
  • the drive means for example an electric motor, then rotate the grinding container 2 in the grinding direction, so that the grinding bodies 18 comminute the ground material.
  • Sufficiently crushed ground material finally reaches the outermost third annular space 29 through the fine sieve shell 8.
  • the conveying means of the third annular space 29 convey the finely ground ground material into the cavity 22 of the loading end disk 20. From there it reaches the fall channel 32 and can be further processed as desired to isolate existing precious metals from the finely ground regrind.
  • the direction of rotation of the grinding container 2 is changed in order to discharge the material, which is only slightly comminuted.
  • the conveying means of the first annular space 27 convey the ground material, which is only slightly comminuted, into the inlet opening 31 of the cavity 22 of the discharge end disk 21, from where it reaches the discharge funnel 33.
  • the discharge end disk is not mounted on a roller 34, but in a roller or slide bearing.
  • the grinding container 2 is expediently designed to be rotationally symmetrical and preferably has an essentially cylindrical outer contour. Such a grinding container 2 can also be referred to as a grinding drum.

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  • Engineering & Computer Science (AREA)
  • Food Science & Technology (AREA)
  • Crushing And Grinding (AREA)

Claims (9)

  1. Dispositif (19) de broyage de produit à broyer, ledit dispositif comprenant
    - un récipient de broyage (2) qui comporte des faces d'extrémité (20, 21),opposées entre elles dans la direction axiale et entre lesquelles se trouve au moins une coque de tamisage (6, 7, 8) qui, conjointement avec une autre coque de tamisage (6, 7, 8) ou une paroi extérieure (38) s'étendant également entre les faces d'extrémité (20, 21), délimite au moins un espace annulaire (27, 28, 29), sachant que la coque de tamisage ou une coque de tamisage la plus intérieure (6) délimitant un espace de broyage (17) dans lequel des corps de broyage (18) sont disposés,
    - un palier (12) destiné à maintenir sur une embase (14) le récipient de broyage (2) en rotation ainsi que
    - des moyens d'entraînement (15) destinés à faire tourner le récipient de broyage (2) sur un axe horizontal (3) dans un sens de broyage,
    Ce dispositif de broyage est caractérisé par le fait que :
    le palier (12) dispose de rouleaux (34) fixés mais pouvant tourner et le récipient de broyage (2) est posé sur les rouleaux (34), une ouverture d'entretien (25) est ménagée sur au moins une face d'extrémité (21, 22) et permet d'inspecter visuellement l'intérieur du récipient de broyage (2), par ailleurs, les faces d'extrémité sont les plaques d'extrémité (20, 21) délimitant chacune une cavité (22) qui est reliée par le biais d'une ouverture d'entrée (30, 31) au récipient de broyage (2) et qui est équipée de dispositifs d'avancement destinés à évacuer le produit à broyer par une ouverture de sortie (23, 24).
  2. Dispositif (19) selon la revendication 1, caractérisé par le fait que le palier (12) comporte au moins quatre rouleaux (34).
  3. Dispositif (19) selon la revendication 1 ou 2, caractérisé par le fait que le palier (12) forme au moins deux axes de rotation (35) qui s'étendent en direction axiale et qui sont chacun solidaires en rotation avec les rouleaux (34), les axes de rotation (35) étant cependant disposés sur des côtés différents du récipient de broyage (2).
  4. Dispositif (19) selon l'une des revendications précédentes, caractérisé par le fait que la cavité (22) d'une plaque d'extraction d'extrémité (21) est reliée par l'ouverture d'entrée (31) à un premier espace annulaire (27) et la cavité (22) d'une plaque d'alimentation d'extrémité (20) est reliée à un deuxième espace annulaire (29).
  5. Dispositif (19) selon l'une des revendications précédentes, caractérisé par le fait que le premier espace annulaire (27) dispose de dispositifs d'avancement de gros morceaux qui, lors de la rotation du récipient de broyage (2) dans un sens d'extraction opposé au sens de broyage, transfère le produit à broyer dans la cavité (22) de la plaque d'extrémité d'évacuation (21), et par le fait qu'un autre espace annulaire (29) dispose de dispositifs d'extraction de produits fins qui, lors de la rotation du récipient de broyage (2) dans le sens de broyage, transfèrent le produit à broyer dans la cavité (22) de la plaque d'alimentation d'extrémité (20).
  6. Dispositif (19) selon l'une des revendications précédentes, caractérisé par le fait que le premier espace annulaire (27) est équipé de dispositifs d'avancement de gros produits qui, lors de la rotation du récipient de broyage (2) dans le sens de rotation du broyage déplacent les produits dans la cavité (22) de la plaque d'extrémité d'évacuation (21), et par le fait qu'un autre espace annulaire (29) dispose de moyens d'avancement de produits fins qui, lors de la rotation du récipient de broyage (2) dans le sens de broyage, transfèrent le produit à broyer dans la cavité (22) de la plaque d'extrémité d'alimentation (20), alors que l'ouverture d'entrée (31) de la cavité (22) de la plaque d'extrémité d'évacuation (21) peut être fermée à l'aide d'un volet actionnable depuis l'extérieur.
  7. Dispositif (19) selon l'une des revendications précédentes, caractérisé par le fait que la plaque d'extrémité d'alimentation (20) comporte une ouverture d'alimentation centrale (10) qui est conçue pour amener le produit à broyer dans la chambre de broyage (17).
  8. Dispositif (19) selon l'une des revendications précédentes, caractérisé par le fait que le récipient de broyage (2) ne vient en appui sur les rouleaux (34) qu'à l'aide de ses plaques d'extrémité (29, 21).
  9. Dispositif (19) selon l'une des revendications précédentes, caractérisé par le fait que les coques de tamisage (6, 7, 8) forment chacune au moins partiellement des ouvertures de taille constante, la taille des ouvertures diminuant dans la direction radiale d'une coque de tamisage (6, 7, 8) à l'autre.
EP17001798.2A 2017-05-05 2017-10-30 Dispositif pour broyage de produit Active EP3398685B1 (fr)

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DE202017002406U1 (de) 2017-05-05 2017-06-29 Mairec Edelmetallgesellschaft Mbh Vorrichtung zum Zerkleinern von Mahlgut
DE102017208145A1 (de) * 2017-05-15 2018-11-15 Affinia Engineering GmbH Siebkugelmühle zur Aufbereitung von metallhaltigem Grobmaterial
CN108500819A (zh) * 2018-04-03 2018-09-07 中国矿业大学 一种混凝土或沥青混合料骨料粒形修饰装置
CN108501210A (zh) * 2018-04-03 2018-09-07 中国矿业大学 一种有机纤维增强复合材料的纤维分散磨和纤维分散方法
CN110976035A (zh) * 2019-11-25 2020-04-10 衡阳阳光陶瓷有限公司 一种多腔室分加工的陶瓷原料球磨机
CN111174207A (zh) * 2020-01-15 2020-05-19 鲍仙林 一种基于齿轮旋转进行智能排渣的垃圾焚烧装置
CN111495563B (zh) * 2020-05-15 2021-10-01 崇左红狮水泥有限公司 一种用于水泥磨出料篦板的篦缝结构
CN114887716B (zh) * 2022-05-12 2023-06-27 锐华硅业(大关)有限公司 一种压裂石英砂膨化塑形智能机器人
CN115845989A (zh) * 2022-11-25 2023-03-28 华能国际电力股份有限公司上安电厂 一种适用于600mw机组磨煤机粉位监测的测量管
CN116532202A (zh) * 2023-04-20 2023-08-04 长江师范学院 一种粒度可调式研磨装置

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FR1567267A (fr) * 1968-03-14 1969-05-16
JPH11169734A (ja) * 1997-12-10 1999-06-29 Oki Electric Ind Co Ltd ボールミル装置用の粉砕容器、粉砕容器構造体、ボールミル装置、およびこれを用いた粉末の粉砕方法
JP2011062578A (ja) * 2009-09-15 2011-03-31 Hitachi Ltd 自動分解装置
DE202014100640U1 (de) 2014-02-13 2014-02-21 Geisberger Gesellschaft für Energieoptimierung mbH Vorrichtung für Biogasanlagen zum Zerkleinern und Zermahlen von Flüssig-Feststoffgemischen
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