EP2701848A1 - Broyeur agitateur optimisé en termes de durée de service - Google Patents

Broyeur agitateur optimisé en termes de durée de service

Info

Publication number
EP2701848A1
EP2701848A1 EP11717264.3A EP11717264A EP2701848A1 EP 2701848 A1 EP2701848 A1 EP 2701848A1 EP 11717264 A EP11717264 A EP 11717264A EP 2701848 A1 EP2701848 A1 EP 2701848A1
Authority
EP
European Patent Office
Prior art keywords
grinding
container
grinding container
agitator
mill
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Withdrawn
Application number
EP11717264.3A
Other languages
German (de)
English (en)
Inventor
Skeljzen NESIMI
Marco CHIALINA
Manuel DUDLI
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.)
Buehler AG
Original Assignee
Buehler AG
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Buehler AG filed Critical Buehler AG
Publication of EP2701848A1 publication Critical patent/EP2701848A1/fr
Withdrawn legal-status Critical Current

Links

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
    • B02C17/16—Mills in which a fixed container houses stirring means tumbling the charge
    • 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
    • B02C17/1805—Monitoring devices 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
    • B02C17/18—Details
    • B02C17/22—Lining for containers

Definitions

  • the invention relates to an agitator mill, in particular an agitator ball mill, for the food industry, in particular for the production of chocolate, an inner casing for a double-walled grinding container of a stirred mill and method for extending the life of a stirred mill.
  • Agitator mills which consist of a stator, a rotor with stirring tools attached to it and grinding bodies. Due to the high friction between stirring tools, grinding containers and grinding media, such a mill is subject to high wear, which leads to long and possibly unpredictable downtimes. There is therefore the one hand, the problem of lack of knowledge of the state of wear and other ⁇ side of Verschleissoptimierung to reduce downtime as much as possible.
  • the publication DE 10028484 discloses a grinding machine which has a sacrificial coating on the inner surface, wherein a detection device is provided which determines the remaining thickness of the sacrificial coating on wear.
  • Such Bradybe ⁇ coating should not be applied in the food industry, since the ground material would be contaminated.
  • a mill is known, whose wear-exposed parts are designed so that they can be rotated symmetrically and so the wear evenly after a rotation on the whole surface ver ⁇ shares. In this case, for example, the housing shell is removed from the mill and rotated or the same agitator de ⁇ mounted and rotated again attached.
  • the disadvantage here is the complicated rebuilding procedure, which in turn leads to high standstill ⁇ times.
  • Document DE1817108 discloses an agitating ball mill whose container ends are made congruent so that the container can be rotated. After rotating the container other part surfaces of the side walls are claimed by the stirring elements, so that the container can be used longer.
  • the rebuilding procedure for such a container is very time consuming and complicated. The wear on the stirrers is not taken into account.
  • the document DE202008014228 U1 shows a ball mill in which means for indicating the wear are provided in a flap for closing a grinding ball outlet. Since the wear of the container is not uniform, a wear measurement due to the arrangement in the MahlShauslass may not be reliable or at least not representative. The downtime remains high.
  • An agitator mill according to the invention for grinding of grinding and mixing material, in particular for fine grinding of cocoa and cocoa mass has a substantially cylindrical or conical milling container, in the operating state with vertically oriented ⁇ cylinder or cone axis.
  • the jacket of the Mahlbe ⁇ container is preferably double-walled and has a Mantelin ⁇ nen description.
  • a rotatably mounted stirring body, which comprises a shaft, is in the operating state in the grinding container.
  • the shaft can be connected to a drive unit mounted in particular on a machine frame of the agitator ball mill. Wei ⁇ terhin, the agitator on mixing tools.
  • In the jacket of the grinding container at least one indicator is arranged, which is suitable for indicating the wear of the inner surface of the casing.
  • the stirring tools are preferably formed radially from the shaft pioneering and / or in particular pin-shaped. Furthermore, the stirring tools may also be disc-shaped. Stirring tools of different types can be arranged on a stirring body. The stirring tools can be firmly connected to the stirring body or also releasably attached to the stirring body. A detachable attachment has the advantage that individual stirring tools can be replaced quickly without replacing the entire stirring body. In addition, grinding tools or grinding discs can be provided on the shell inner surface, ie on the stator.
  • An indicator in the context of this application is a means for indicating a wear inside the Mahlgut mattersers on or in the shell inner surface.
  • Such an indicator is preferably mechanically formed.
  • the detection of wear can be done visually or electrically, for example via color sensors.
  • an indicator has the advantage that the wear of the sheath at a defined point, which is rotationally symmetrical ⁇ , can be displayed and thus provides an indication that is representative of the wear of the lateral surface.
  • a too rapid exchange of one means of ⁇ is prevented as a preventive measure on the one hand, on the other hand to a later exchange after the inner surface area has already been zer ⁇ interfere.
  • Such a sudden failure would lead to high downtime, which is prevented by the use of the indicator.
  • the stress on the shell inner surface is not the same everywhere along the rotor axis, at least two wear indicators, in particular axially spaced indicators, are preferably used.
  • the arrangement in the lateral surface is advantageous, since in this way no Messungsvertigschept can occur, for example, by unevenness or other materials.
  • the drive unit is preferably an electric motor.
  • the grinding container are preferably grinding media, in particular grinding balls.
  • the grinding media are freely mounted in the tank and preferably as balls, particularly steel balls or Ke ramikkugeln ⁇ , configured.
  • the diameter of the grinding balls is substantially 2 -12 mm, preferably substantially 4-9 mm, in particular preferably ⁇ preferably substantially 6 mm.
  • the use of grinding media increases the shear stress of the millbase and thereby increases the grinding performance.
  • the mantle of the agitator ball mill if the Mahlgut capableer is cylindrical, in this case refers to the Mahlgut capableer without the lid and the bottom.
  • Mahlgut For the case of conical surfaces Wesentli ⁇ Mahlgut unitsers the mantle designates the meal ⁇ product container without a lid.
  • the jacket is preferably configured circular Wesentli ⁇ chen.
  • the jacket of the grinding container is preferably designed double-walled. This has the advantage that the grinding container can be tempered. The temperature can be controlled by an open or closed water circuit.
  • the temperature control is preferably a cooling.
  • the indicator is mechanically formed.
  • the indicator is chosen so that it wears faster than the shell inner surface. Since ⁇ through the material of the indicator is in front of the material of the Man ⁇ telinnen Structure destroyed and the display of the Verschleissworts is made possible. A faster wear can be achieved by a ge ⁇ ringere wall thickness than the shell inner surface or else by a wear-prone material.
  • the jacket of the grinding container preferably has at least one bush into which an indicator sleeve can be inserted, which in Direction of the container interior has a sleeve wall which wears faster than the outer surface of the grinding container.
  • the indicator sleeve has an outwardly facing opening, through which an outlet of the ground material can be detected as soon as the sleeve wall is worn.
  • an opening enables low-cost design of an indicator entwe ⁇ of the same material as the inner jacket or from a 29leissan perennialeren material.
  • the wall thickness of the facing into the grinding vessel wall of the indicator is smaller than the wall thickness of the inner shell vorteilhafterwei ⁇ se when using the same material.
  • the shell inner surface of the grinding container is preferably designed exchange ⁇ bar.
  • the inner jacket (5) is exchangeable.
  • the jacket inner surface or the inner jacket are designed to be sealing and are inserted and fastened in the grinding container or the outer jacket. This attachment is preferably solvable.
  • the shell inner surface represents a coating which is designed as a sacrificial coating.
  • Such a grinding container can be used up to the wear limit of the sacrificial coating and then re-coated.
  • two grinding containers are used so that the agitator ball mill can continue to be used during the coating of the grinding container or even only of the inner jacket.
  • One of ⁇ replaceable inner surface area reduces the maintenance time and saves costs.
  • the grinding container is preferably designed symmetrically with respect to a plane perpendicular to the cylinder axis of the grinding container, so that the grinding container can be brought into two different orientations with respect to the stirring body by rotation of the grinding container in order to operate the agitator ball mill. Since the stand in Radio ⁇ lower part of the grinding container is more stressed, wear is also greater here.
  • the symmetrical Ausges taltung allows rotation of the container and therefore exchanges the more surfaces subject to wear in the grinding material container with the less stressed surfaces in the upper part of the Mahlgut theoreticalers. This leads to a longer shelf life of the grinding stock.
  • leads and Ab ⁇ lines are designed to be easily detachable to reach a short set-up time to it.
  • coolant inlet and outlet, the indicator bushings, the inlet and outlet for the ground material and the fastening elements for coupling to the machine frame and / or the stirrer shaft are arranged symmetrically.
  • an agitator mill wherein the shell inner surface of Mahlbenzol age is symmetrical with respect to a plane perpendicular to the cylinder axis of the grinding container, so that the operation of the agitator ball mill, the shell inner surface of the grinding container in two different orientations with respect to the stirring body and the outer shell can be brought, in particular as described above be ⁇ written .
  • a grinding container with a rotatably mounted stirring body comprising a shaft which with egg ner mounted in particular on a machine frame of the agitator mill drive unit is connected, and stirring tools, wherein in the shell of the grinding container at least one indicator for indicating the wear of the shell inner surface is arranged.
  • the grinding container has a substantially cylindrical or conically shaped grinding container with vertically aligned cylinder or cone axis in the operating state.
  • the agitator ball mill comprises a rotatably gelager ⁇ th stirring body comprising a shaft which is connectable to a particular mounted on a machine frame of the agitator mill drive unit.
  • Such a configuration allows a rotation of the wear-applied inner shell surface by 180 ° with respect to a plane perpendicular to the cylinder axis of the grinding container. Since the operating state lower part of the grinding container is more bean ⁇ sprays, the wear is greater here.
  • the symmetrical design makes it possible to rotate at least the shell inner surface and therefore exchanges the surfaces subject to wear in the grinding stock container with the less stressed surfaces in the upper part of the grinding stock container. This leads to a län ⁇ geren durability of Mahlgut disposers. An exchange, which is limited only to the inner shell, time and material pa ⁇ rend feasible and therefore cost.
  • Mahlgut With such symmetric configuration of the Mahlgut representatives at least two indicators in the Mantelin ⁇ inner face for indicating the wear of the inner surface area are preferably arranged. Two indicators allow the detection of wear in both operating positions of the grinding container. Of the Use of other indicators provides an overview of the Verschleissintenstician at different positions in Mahlbe ⁇ container.
  • the grinding container a plane is double-walled and the inner shell of the milling container with respect to perpendicular to the cylinder axis of the grinding container ⁇ formed symmetrically, so that can be brought for loading ⁇ driving the agitator mill of the inner shell of the milling container in two different orientations with respect to the stirring body.
  • the grinding container is connected to a pivot shaft and rotatable about the pivot shaft axis, wherein the pivot shaft axis substantially perpendicular to the cylinder or cone axis of the grinding container and is mounted in the machine frame.
  • the pivot shaft is connectable to a second drive unit.
  • a pivot shaft he ⁇ facilitates the rotation of the grinding container, on the one hand to remove ⁇ example, the stirring body from the grinding container.
  • the stirring body is separated from the drive and rotated with the grinding container.
  • the stirring body In order to initiate the rotation, the stirring body must either be lowered slightly after being separated from the drive, or the drive must be raised slightly. The vertical space requirement for removing the stirring body is drastically reduced if the stirring body can be removed to the side.
  • a second drive unit according to the invention is preferably mechanical.
  • it is a crank drive ⁇ unit.
  • a mechanical drive is inexpensive to manufacture and use and meets the hygienic requirements of the food industry. It would also be possible to use an electric second drive unit or, for example, the use of a power magnifier, a Röschen key or a wheel.
  • the second drive unit can be connected to the pivot shaft on and off ⁇ coupled, in particular on the machine frame and abkop ⁇ pelbar. Due to the removability of the second drive unit can be removed during operation and are coupled ⁇ only when needed and does not interfere with the operation and undergoes no ⁇ lei vibration, so that the durability of the drive unit being ⁇ increased. Also, the pivoting angle can be increased by repeated Anset ⁇ zen the drive unit, depending on the embodiment. Furthermore, when using a plurality of stirred ball mills in a production, the same drive unit can be used for the pivotal movement of the container of different agitator ball mills.
  • the second drive unit can be coupled to the machine frame in at least two orientations, so that the drive can be operated from two sides. This facilitates handling.
  • An embodiment according to the invention further includes an inner jacket for a double-walled grinding container of a stirred ball mill, wherein the inner jacket has fastening means for detachable attachment to the outer jacket.
  • Such an inner jacket is preferably sealed, so that together with the outer jacket, a cavity is formed, in which Tempe ⁇ rier gallkeit may be located. This allows a quick exchange and enables a cost-optimized production.
  • One Fastening means may for example be a screw, a flange, a Baj onettver gleich, a jam or a wei ⁇ tere releasable attachment.
  • a method for extending the service life of a stirred ball mill comprises the following steps.
  • the millbase is introduced into the agitator ball mill, then the ground material is ground, while the wear of the shell inner surface is controlled by means of an indicator which is arranged in the shell of the container.
  • an indicator which is arranged in the shell of the container.
  • the container can be rotated as a function of the wear as a further step and thus brought into a second operating position. This reduces set-up times and operating costs of the agitator ball mill.
  • An alternative method for extending the service life of a stirred ball mill is the positioning of the inner shell of the grinding container in a second orientation with respect to the agitating ⁇ body and the outer shell.
  • Another orientation of the In ⁇ nenmantels represents a cost-effective option, since only the inner shell is rotated or replaced depending on the state of wear and therefore the material consumption is lower.
  • an outlet sieve is provided in an agitator ball mill according to the invention, which is arranged concentrically around the stirring body. Between agitator and outlet strainer is an axial provided as a gap, can escape through the regrind. The axial gap is narrower than the largest grinding media diameter. As a result, no grinding media can get into the gap and get stuck there.
  • FIG. 1 shows an overall perspective view of an agitator ball mill according to the invention
  • FIG. 2 shows a perspective detailed view of an agitator ball mill according to the invention
  • Fig. 1 shows an embodiment of an inventive agitator mill is 1.
  • a grind pot 2 is attached to a frame 7 allocates ⁇ .
  • the grinding container 2 has a jacket 4, which is designed double-walled.
  • a stirring body 6 is arranged in the grinding container 2.
  • Stirring tools 8 are formed on the stirring body 6.
  • the stirring tools 8 are configured in a disk-shaped and pin-shaped manner and point radially away from the stirring body axis 3.
  • the grinding container 2 is formed symmetrically and about pivot axis 13 by crank drive 15 rotatable.
  • the stirring body 6 is driven by a drive which is located above the grinding container 2 on the frame 7, but is not explicitly shown.
  • fluid Ground material pumped from below into the grinding container 2 and ground with the aid of the grinding media and the stirring tools 8.
  • the lower portion of the grinding container 2 and the stirring tools 8 are subject to high wear.
  • the wear of the shell inner surface is monitored here by the indicator 9 and made visible. Once the wear has been made visible, the container 1 can be rotated about the pivot axis 13 by 180 ° with Hil ⁇ fe of a crank drive 15, so that the preparation ⁇ che high wear with areas of lower wear are exchanged.
  • the crank drive 15 can also be used to tilt the Mahlbe ⁇ container 2 together with the stirring body 6 only by 90 °. In such a position can then take place, for example, a cleaning.
  • Such a stirred mill has a capacity of 400-2000 kg / h.
  • 3 agitator mills for example, can be integrated into the manufacturing process. So a capacity of up to 6000 kg / h can be reached.
  • the drive motor of the agitator mill has a power output of between 55 kW and 220-330 and preferably has a more energy- ⁇ zienzlection of IE2 IE3 or on.
  • Fig. 2 shows a section of the grinding container 2 in the region of the product outlet.
  • a stirring body 6 is arranged with stirring tools 8.
  • an indicator 9 is arranged, which measures the wear of the inner shell 5.
  • grinding media are freely ⁇ movably arranged, which are not shown.
  • the material to be ground is pumped from below through the grinding container and passes through an outlet sieve 16, which may be made vibrating out of the Grind container 2 off.
  • the outlet strainer is designed so that the grinding media does not pass through the sieve.
  • an axial gap 14 is provided between agitator 6 and outlet screen 16, an axial gap 14 is provided. In the event that the outlet screen 16 is clogged, the milled material can leave the grinding chamber through the axial gap 14 and pressure increases in the grinding container 2 are prevented.
  • Fig. 3 shows a release grinding container 2, in the jacket 4 three indicators 9 are arranged to determine the wear.
  • the jacket 4 is configured symmetrically and rotatable about pivot axis 13.
  • Fig. 4 shows an inventive indicator 9 to determine the wear of the inner shell 5.
  • the indicator 9 is recessed in the inner cladding, but has an inner wall 18 with ge ⁇ ringerer thickness than the wall thickness of the inner casing 5. For moving ⁇ cher stress, the indicator is therefore destroyed faster than the inner shell.
  • a window 17 is arranged ⁇ , so that when destruction of the indicator 9, regrind through the window 17 is visible.
  • crank drive 15 for the rotation of the grinding container 2 (not shown here) by 90 ° about the pivot axis 13.
  • the crank drive 15 is detachable, so that it is attached to the agitator ball mill only during the rotation.
  • the crank drive For the rotation of the grinding container by 180 °, the crank drive must be rescheduled again, so that twice by 90 ° ge ⁇ turns.
  • the crank drive 15 comprises three fixed points, one of which is determined by the rotary joint 19. This Wheelkupp ⁇ ment 19 is disposed on the pivot axis 13 of the grinding container.
  • the rotary joint is connected to a threaded rod 23.
  • the suspension of the threaded rod 23 is fixed at two points on the frame 7.

Landscapes

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

Abstract

L'invention concerne un broyeur agitateur (1) utilisé pour broyer un produit à broyer ou à mélanger, en particulier pour broyer finement du cacao et des masses de cacao. Ledit broyeur comprend un récipient de broyage (2) formé de manière sensiblement cylindrique ou conique et présentant un axe cylindrique ou conique orienté verticalement lorsqu'il est en service, dont l'enveloppe (4) est en particulier à double paroi. Le broyeur agitateur (1) présente une surface intérieure d'enveloppe et un corps agitateur (6) monté de manière rotative, comprenant un arbre pouvant être relié à une unité d'entraînement montée en particulier sur un bâti de machine du broyeur agitateur, ainsi que des outils d'agitation (8), au moins un indicateur (9) étant agencé dans l'enveloppe du récipient de broyage pour afficher l'usure de la surface intérieure de l'enveloppe.
EP11717264.3A 2011-04-28 2011-04-28 Broyeur agitateur optimisé en termes de durée de service Withdrawn EP2701848A1 (fr)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
PCT/EP2011/056755 WO2012146287A1 (fr) 2011-04-28 2011-04-28 Broyeur agitateur optimisé en termes de durée de service

Publications (1)

Publication Number Publication Date
EP2701848A1 true EP2701848A1 (fr) 2014-03-05

Family

ID=44626117

Family Applications (1)

Application Number Title Priority Date Filing Date
EP11717264.3A Withdrawn EP2701848A1 (fr) 2011-04-28 2011-04-28 Broyeur agitateur optimisé en termes de durée de service

Country Status (2)

Country Link
EP (1) EP2701848A1 (fr)
WO (1) WO2012146287A1 (fr)

Families Citing this family (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102013114001B3 (de) * 2013-12-13 2015-02-19 Netzsch-Feinmahltechnik Gmbh Mahlvorrichtung mit Verschleißscheibe
CN109772524A (zh) * 2019-03-14 2019-05-21 湖北科技学院 一种高效磁力球磨机
CN115415018B (zh) * 2022-09-22 2023-07-04 乌海市西水水泥有限责任公司 一种过滤式水泥生产用球磨机
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
EP4527207A1 (fr) 2023-09-25 2025-03-26 Royal Duyvis Wiener B.V. Broyeur agitateur, en particulier broyeur à boulets, pour l'affinage de matière particulaire
WO2025068307A1 (fr) 2023-09-25 2025-04-03 Royal Duyvis Wiener B.V. Broyeur à agitateur, en particulier broyeur à boulets, pour raffiner des matières particulaires

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Publication number Priority date Publication date Assignee Title
DE1817108C3 (de) 1968-05-17 1980-04-17 Veb Maschinenfabrik Heidenau, Ddr 8312 Heidenau Rührwerkskugelmühle
DE3614721C2 (de) 1986-04-30 1995-04-06 Buehler Ag Geb Rührwerksmühle
DE3811483A1 (de) 1988-04-06 1989-10-19 Wahl Verschleiss Tech Kugelmuehle
US4979686A (en) * 1989-10-03 1990-12-25 Union Process, Inc. High speed dry grinder
AUPQ084999A0 (en) 1999-06-08 1999-07-01 Erich Netzsch Gmbh & Co Holding Kg A grinding machine
DE202008014228U1 (de) 2008-10-21 2009-01-15 BEAR Mühlen & Behälter GmbH Kugelmühle

Non-Patent Citations (1)

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Title
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Also Published As

Publication number Publication date
WO2012146287A1 (fr) 2012-11-01

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