EP2061600B1 - Unité de broyage avec dispositif de refroidissement - Google Patents

Unité de broyage avec dispositif de refroidissement Download PDF

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Publication number
EP2061600B1
EP2061600B1 EP07803157A EP07803157A EP2061600B1 EP 2061600 B1 EP2061600 B1 EP 2061600B1 EP 07803157 A EP07803157 A EP 07803157A EP 07803157 A EP07803157 A EP 07803157A EP 2061600 B1 EP2061600 B1 EP 2061600B1
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EP
European Patent Office
Prior art keywords
grinding
wall
cooling
grinding unit
unit according
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.)
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Application number
EP07803157A
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German (de)
English (en)
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EP2061600A1 (fr
Inventor
Ernst Michael Haas
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.)
FLSmidth AS
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FLSmidth AS
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Publication of EP2061600A1 publication Critical patent/EP2061600A1/fr
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    • 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
    • B02C17/14—Mills in which the charge to be ground is turned over by movements of the container other than by rotating, e.g. by swinging, vibrating, tilting

Definitions

  • the present invention relates to a milling unit for a vibrating mill, in particular for a disc vibrating mill, wherein in the milling unit, a grinding chamber is formed, which is laterally bounded by a grinding wall, and comprising a cooling device surrounding the grinding wall.
  • a grinding chamber is formed, which is laterally bounded by a grinding wall, and comprising a cooling device surrounding the grinding wall.
  • a cooling device is eg off US 570 2060 known.
  • Such grinding units or vibrating mills are used, for example, for grinding a sample of pourable, granular ground material in the course of preparation of the sample for desired analyzes, for example for X-ray-based investigations of the elements contained with suitable equipment (eg XRF). Also regrind, which is rinsed by a liquid in the grinding chamber, is conceivable.
  • the sample which may be, for example, a rock sample, ore, slag, etc., is mixed in the vibratory mill with excipients and ground and then pressed with addition aids to a tablet, which is fed to an analyzer for analysis of the components.
  • the sample must be crushed in such a way that all components give a homogeneous mixture, for which a fine and uniform comminution of the material to be ground in the vibratory mill is essential. Often it is required that after the grinding process, a certain proportion of the particles (for example 90%) must fall below a certain size (for example 32 ⁇ m). For a quantitative determination of ingredients it is essential that the analysis is based on a well-defined sample size.
  • a controlled automatic vibratory mill have a metering device for feeding the milling unit with regrind and tools in always exactly defined amount. After an adjustable grinding time (so-called grinding phase), the ground sample material is emptied into a sample collecting container during an adjustable discharge phase.
  • compositions of the material to be ground it may, in particular after the end of the grinding cycle in the automatic discharge to adhesions in the milling unit, in particular in the Austrags Schemeen the Grinding vessel, the discharge area and the spout come. As a result, not all of the sample is available for analysis and thus the
  • Adhesions as well as shape and position deviations on the grinding chamber bordering the grinding wall are particularly disadvantageous in that the grinding gap formed with a grinding ring or a grinding stone can lose its original parallel boundary which is essential for achieving fine grinding material particles and uniform particle size.
  • a grinding unit mentioned at the outset for a vibrating mill has a cooling device surrounding the grinding wall.
  • the grinding wall of the grinding chamber is surrounded by an annular flow space, which is bounded by an outer shell and by the upper and lower ends of the flow space bounding bottom and top walls.
  • the invention has the object, advantageously further develop a grinding or vibrating mill of the type mentioned, so that in particular the suitability for the production of small Mahlgutpumblen is improved with uniform particle size as possible.
  • the back support according to the invention of the grinding wall between adjacent cooling channels which preferably acts at about half the height of the grinding wall, allow a comparatively short grinding operation without cooling, in which there is no support by the heating otherwise quickly to an approximately barrel-like bulge of the grinding wall would come to the outside.
  • the cooling channels are introduced as cooling grooves in an outer wall surface of a housing part of the milling unit adjoining the grinding wall and the support projection adjoining the grinding wall with its free end is an integral part of the housing part.
  • An expedient embodiment may be that the grinding wall is cylindrical and the cooling grooves are introduced into a cylindrical wall surface of a housing ring of the milling unit adjoining it on the outside. It is also preferred that the housing ring is thermally shrunk onto the grinding wall.
  • the outer housing part can be heated prior to assembly and then the grinding wall are inserted into the opening provided for it in the housing part. In the subsequent cooling, the housing part contracts, whereby it comes to an interference fit between the spaced sections of the wall surface, in which the cooling grooves are introduced, and the outside of the grinding wall.
  • the grinding wall is glued into the outer housing part.
  • the cooling grooves In order to achieve a cooling effect that is as uniform as possible over the circumference, it is preferable for the cooling grooves to extend along a predominant peripheral section, preferably over a circumferential angle of approximately 350 degrees.
  • the cooling grooves may extend to a common, continuous passage section, preferably by means of a radial wall projection of the housing part surrounding the grinding wall, separate drain section. If a cooled liquid, for example water, is supplied through the feed section, it flows in a clear direction through the cooling channels to the discharge section.
  • a cooled liquid for example water
  • At the inlet and outlet section can preferably be connected to a cooling unit, which allows circulation of the coolant at a controlled coolant temperature.
  • the support projection may be interrupted in the region of the inlet section and / or the outlet section.
  • An expedient development is possible in that spaced above in the adjacent from the outside of the vertical grinding wall wall surface of the housing part a circumferential groove with an annular seal, for example, with an O-ring, is provided in each case from the uppermost cooling groove and below the lowest cooling groove.
  • a uniform support of the grinding wall is achieved when the housing part, in which the cooling grooves are introduced, above the uppermost cooling groove and below the lowermost cooling groove preferably on both sides of the annular seals wall portions adjacent to the grinding wall supporting the outside.
  • the grinding unit has a connection for a blowing medium for purifying the discharge channel, preferably for compressed air, which opens for distribution in an annular channel, which from the housing part , in which the cooling grooves are introduced, and is bounded by an adjacent housing portion, so that a narrow annular gap remains as a passage to the discharge channel.
  • the narrow annular gap may have a width of preferably a few or a few millimeter fractions up to possibly a few millimeters in a cross-sectional plane oriented transversely to the circumferential direction.
  • the milling unit can be equipped with temperature sensors, which may preferably be arranged in the region of the grinding wall.
  • the sensors can send measurement signals to a control unit of a connected cooling unit in order to keep the temperature of the grinding wall as constant as possible in the course of a regulation by means of an adaptation of the inlet temperature as required.
  • the invention also encompasses a vibrating mill, in particular a disk vibrating mill, comprising a grinding unit that can be excited to vibrate by means of a vibrating drive, wherein the grinding unit realizes one or more of the features described above according to the invention.
  • FIG. 1 shows in a cross section the upper portion of a vibrating mill 1 according to the invention or a grinding unit 2 according to the invention according to a preferred embodiment.
  • An overall view of the vibratory mill partly schematically shows FIG. 3 , This is a so-called disc vibratory mill.
  • mowing unit 2 represents one of a separate, connected to the milling unit vibratory drive vibratable assembly which includes a grinding chamber 3, which is externally bounded by a cylindrical grinding wall 4.
  • a grinding ring 6 and a grinding stone 7, which is a round solid body not cut in the illustration, are located in the embodiment shown.
  • the outer diameter of the Mahlringes 6 is smaller than the inner diameter of the grinding wall 4, and the outer diameter of the grinding stone 7 is smaller than the inner diameter of the Mahlringes 6.
  • Mahlspalt 8 and the Mahlspalt formed between Mahlring 6 and Mahlstein 7 9 allow a lateral relative movement of Mahlring 6 and millstone 7 both to each other and with respect to the grinding wall 4.
  • Mahldeckel 10 At the latter includes sealed on the top side a Mahldeckel 10 at. In FIG. 1 , in which the grinding soil 5 is during the so-called.
  • the vertical distance between the grinding floor 5 and Mahldeckel 10 is only slightly larger than the height of grinding ring 6 and millstone 7, so just the desired game for the lateral movement arises.
  • To the grinding wall 4 includes radially outside a housing ring 11, which is bolted to the underside with a housing base 12 and thereby connected to a drive flange 13.
  • the housing ring 11 On the upper side, the housing ring 11 is screwed to a housing cover 14.
  • Its underside has a recess 15, in which edge of a seal 16, in the example chosen an O-ring, and therein a grinder lid 17 are used.
  • the housing cover 14 and the grinding lid 17 have off-center passage openings for forming an entry opening 19. Through this, the grinding stock (not shown) to be comminuted can be filled into the grinding chamber 3 from above, where it is distributed in the grinding gaps 8, 9.
  • the grinding wall 4, the grinding ring 6 and the grinding stone 7 can be made of a particularly suitable, in particular made of an abrasion-resistant hard material, while can be used for the housing ring 11 and the other housing parts and a conventional construction material, eg. Steel or light metal.
  • a bracket 20 is screwed on the underside, which carries with its free end a cylinder 21 shown in simplified form, whose upper side protruding piston 22 is fastened by screwing to the grinding base 5 on the underside.
  • the cylinder 21 has two ports 23, 24 for supplying a pressurized fluid, such as air or hydraulic fluid.
  • a pressurized fluid such as air or hydraulic fluid.
  • a pressure medium which acts on the interior of the cylinder 21, a pressure surface of the piston 22, not shown from below and presses it with the grinding soil 5 up until the grinding soil 5 with a step 25 in limiting positive engagement with the grinding wall 4 occurs.
  • the stage 25 occurs against a lower chamfer 26 of the grinding wall 4 and a subsequent step 25 adjacent portion of the grinding tray 5 fits into the enclosed by the grinding wall 4 cross-section, the grinding chamber 3 is sealed during the grinding operation along the outer periphery of its grinding floor.
  • FIG. 2 shows comparatively a second operating position in which the upper port 23 is acted upon by a pressurized fluid.
  • a pressure application surface of the piston 22 is acted upon from above in a manner not shown, so that the piston 22 pulls the grinding base 5 down until it enters a defined positive stop with a collar 27 of the housing base 12.
  • the gap 28 running along the circumference, through which the grinding material crushed during grinding moves into an annular discharge channel 29 and, as a result, vibration excitation up to an outlet opening, as a result of the centrifugal forces occurring in a further vibration excitation 30 reaches an outlet 31.
  • the discharge channel 29 is bounded radially inwardly by the grinding base 5, the underside by a resiliently supported thereon seal 32 and the housing base 12 and radially outside of the housing base 12, while at the top of the housing ring 11 and the grinding wall 4 connect.
  • the thus formed cross-section of the discharge channel 29 is offset with respect to the grinding chamber obliquely downward / radially outside.
  • FIG. 3 schematically illustrates that in the FIGS. 1 and 2 shown mowing unit 2 on the drive flange 13 is supported on the underside by means of spring-damper elements 33 on a solid surface.
  • an oscillating drive 34 is flange-mounted on the underside by means of screw connections.
  • this has a drive motor 35, here an electric motor, on whose shaft 36 rotates in an overlying housing 37 to the shaft 36 off-center, known per se and therefore not graphically illustrated with imbalance or an eccentric.
  • the torsional vibration generated in this way in the drive device is transmitted via the drive flange 13 to the connected entire milling unit 2, including all involved in the grinding process and the discharge of the ground material walls.
  • the vibrating mill 1 or its milling unit 2 is equipped with a cooling device 38 for the rear or outer cooling of the grinding wall 4.
  • this cooling device has two cooling channels 39, which are directly adjacent to the grinding wall 4 and are spaced apart from each other in parallel.
  • these are two cooling grooves 39 which are introduced into the wall surface 40 of the housing ring 11 of the milling unit 2 that adjoins the grinding wall 4 on the outside.
  • the cooling grooves 39 which in the example chosen but not necessarily extend parallel to each other over a circumferential angle of about 350 degrees, are spaced apart from each other by means of a likewise circumferentially extending support projection 41 which is rib-shaped.
  • FIGS. 1 . 2 show this ring-segment-like support projection 41 in the assembled state in a supporting abutment against the outside of the outer wall 4.
  • the support projection 41 is integral, ie integral part of the housing ring eleventh
  • FIG. 4 also shows that the cooling grooves 39, starting from a common inlet section 42, extend to a likewise common outlet section 44 separated therefrom by a radial wall projection 43 of the housing ring 11.
  • the inlet and outlet are separated by flow, so that a targeted circulation of sensing means, which is provided, for example.
  • FIG. 1 shows that in the feed section 42 (and in the in Fig.
  • FIG. 4 further shows that the support projection 41 is interrupted in the region of the inlet and outlet sections 42, 44, or ends before these sections.
  • a circumferential groove 46 is provided with a ring seal 47 in the wall surface adjoining the vertical grinding wall 4 from the outside 40 of the housing ring 11 above the upper cooling groove 39 and below the lower cooling groove 39 per a circumferential groove 46 in the wall surface adjoining the vertical grinding wall 4 from the outside 40 of the housing ring 11 above the upper cooling groove 39 and below the lower cooling groove 39 per a circumferential groove 46.
  • the housing ring 11, in which the cooling grooves 39 are introduced has above the upper cooling groove 39 to both sides of the ring seals 47 still wall areas, which abut the outside of the grinding wall 4 from the outside.
  • FIGS. 1 and 2 show, moreover, that the housing ring 11, in which the cooling grooves 39 are introduced, directly adjoins the discharge channel 29 surrounding the grinding base 5.
  • the vibrating mill 1 has a connection 48 for a blowing medium, in the selected example compressed air, which opens into an annular channel 49, which of the housing ring 11, in which the cooling grooves 39 are introduced, and bounded by the adjacent housing base 12 is, so that a narrow annular gap 50 is formed as a passage to the discharge channel 29.
  • a blowing medium in the selected example compressed air

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

Claims (12)

  1. Unité de broyage pour un broyeur vibrant, en particulier pour un broyeur vibrant à disques, dans l'unité de broyage étant prévue une chambre de broyage, bordée latéralement par une paroi de broyage, et présentant un dispositif de refroidissement entourant la paroi de broyage, le dispositif de refroidissement (38) présentant deux canaux de refroidissement (39) ou plus, limitrophes à la paroi de broyage (4) depuis l'extérieur, s'étendant en périphérie le long d'au moins un tronçon périphérique commun de la paroi de broyage (4), des canaux de refroidissement (39) voisins étant espacés les uns des autres, au moins quant à des tronçons périphériques, au moyen d'une saillie d'appui (41) s'étendant en périphérie, au moyen de laquelle la paroi de broyage (4) est soutenue contre un boîtier (11) l'entourant extérieurement, caractérisée en ce qu'un canal d'évacuation (29), s'étendant en particulier en forme d'anneau autour du fond de broyage (5), est prévu pour l'évacuation hors du broyeur vibrant (1) du produit à broyer ayant été broyé, et en ce que les gorges de refroidissement (39) sont ménagées dans une partie de boîtier, en particulier un anneau de boîtier (11) de l'unité de broyage (2), limitrophe au canal d'évacuation (29).
  2. Unité de broyage selon la revendication 1, caractérisée en ce que les canaux de refroidissement (39) sont ménagés sous forme de rainures de refroidissement (39), dans une surface de paroi (40), limitrophe extérieurement à la paroi de broyage (4), d'une partie de boîtier de l'unité de broyage (2), et en ce que la saillie d'appui (41), limitrophe par son extrémité libre, de l'extérieur, à la paroi de broyage (4), est une partie constituante intégrale de la partie de boîtier.
  3. Unité de broyage selon la revendication 1, caractérisée en ce que la paroi de broyage (4) est de configuration cylindrique et les gorges de refroidissement (39) sont ménagées dans une surface de paroi (40) cylindrique, lui étant limitrophe extérieurement, d'un anneau de boîtier (11) de l'unité de broyage (2).
  4. Unité de broyage selon l'une ou plusieurs des revendications précédentes, caractérisée en ce que l'anneau de boîtier (11) est fretté thermiquement sur la paroi de broyage (4).
  5. Unité de broyage selon l'une ou plusieurs des revendications précédentes, caractérisée en ce que la paroi de broyage (4) est collée dans l'anneau de boîtier (11).
  6. Unité de broyage selon l'une ou plusieurs des revendications précédentes, caractérisée en ce que les gorges de refroidissement (39) s'étendent le long d'un tronçon périphérique majoritaire, en particulier sur un angle inscrit d'à peu près 350 degrés.
  7. Unité de broyage selon l'une ou plusieurs des revendications précédentes, caractérisée en ce que les gorges de refroidissement (39) s'étendent, en partant d'un tronçon d'amenée (42) commun, en un tronçon d'évacuation (44) commun séparé continûment de celui-ci, en particulier au moyen d'une saillie de paroi (43) radiale de la partie de boîtier entourant la paroi de broyage (4).
  8. Unité de broyage selon l'une ou plusieurs des revendications précédentes, caractérisée en ce que la saillie d'appui (41) est interrompue dans la zone du tronçon d'amenée (42) et/ou du tronçon d'évacuation (44).
  9. Unité de broyage selon l'une ou plusieurs des revendications précédentes, caractérisée en ce que, dans la surface de paroi (40), limitrophe extérieurement à la paroi de broyage (4), de la partie de boîtier est respectivement prévue, au dessus de la gorge de refroidissement (39) la plus haute et au-dessous de la gorge de refroidissement (39) la plus basse, une gorge périphérique (46) avec un joint d'étanchéité annulaire (47).
  10. Unité de broyage selon l'une ou plusieurs des revendications précédentes, caractérisée en ce que la partie de boîtier, dans laquelle les gorges de refroidissement (39) sont ménagées, présente, au dessus de la gorge de refroidissement (39) la plus haute et au-dessous de la gorge de refroidissement (39) la plus basse, des zones de paroi limitrophes extérieurement à la paroi de broyage (4).
  11. Unité de broyage selon l'une ou plusieurs des revendications précédentes, caractérisée en ce que l'unité de broyage (2) présente un raccordement (48) pour une fluide de soufflage, pour ramoner le canal d'évacuation, en particulier pour de l'air comprimé, qui débouche en un canal annulaire (49), bordé par la partie de boîtier, dans laquelle les gorges de refroidissement sont ménagées, et par un tronçon de boîtier limitrophe, de manière que subsiste un étroit intervalle annulaire (50), faisant office de passage vers le canal d'évacuation.
  12. Broyeur vibrant, en particulier broyeur vibrant à disques, présentant une unité de broyage susceptible d'être excitée en vibrations au moyen d'un entraînement vibrant, caractérisé en ce qu'une unité de broyage selon l'une ou plusieurs des revendications précédentes est prévue.
EP07803157A 2006-09-08 2007-09-03 Unité de broyage avec dispositif de refroidissement Active EP2061600B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE102006042825A DE102006042825A1 (de) 2006-09-08 2006-09-08 Mahleinheit mit Kühleinrichtung
PCT/EP2007/059170 WO2008028883A1 (fr) 2006-09-08 2007-09-03 Unité de broyage avec dispositif de refroidissement

Publications (2)

Publication Number Publication Date
EP2061600A1 EP2061600A1 (fr) 2009-05-27
EP2061600B1 true EP2061600B1 (fr) 2011-06-22

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Application Number Title Priority Date Filing Date
EP07803157A Active EP2061600B1 (fr) 2006-09-08 2007-09-03 Unité de broyage avec dispositif de refroidissement

Country Status (7)

Country Link
EP (1) EP2061600B1 (fr)
CN (1) CN101557876B (fr)
AT (1) ATE513618T1 (fr)
AU (1) AU2007293940B2 (fr)
DE (1) DE102006042825A1 (fr)
ES (1) ES2364592T3 (fr)
WO (1) WO2008028883A1 (fr)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN109482313A (zh) * 2019-01-14 2019-03-19 香农工业设备制造南京有限公司 一种应用于振动研磨机的自动出料磨盘
DE102019207224A1 (de) * 2019-05-17 2020-11-19 Thyssenkrupp Ag Vorrichtung zur Zerkleinerung von Einsatzmaterial sowie Verwendung eines Kühlungsgehäuses an der Vorrichtung

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102008035008A1 (de) 2007-09-14 2009-04-30 PFAFF AQS GmbH automatische Qualitätskontrollsysteme Schwingmühle und Reinigungsverfahren für Schwingmühle
DE102008035009A1 (de) 2007-09-14 2009-05-20 PFAFF AQS GmbH automatische Qualitätskontrollsysteme Schwingmühle

Family Cites Families (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
SU510133A3 (ru) * 1970-12-24 1976-04-05 Клекнер-Хумбольдт-Дойтц Аг (Фирма) Вибромельница
AU5783273A (en) * 1973-07-06 1975-01-09 Klockner-Humboldt-Deutz Aktiengesellschaft Grinding process and apparatus therefor
IT1259281B (it) * 1992-10-30 1996-03-11 Mulino oscillante a sfere ad alta energia
DE4343742C2 (de) * 1993-12-21 1999-10-14 Krupp Polysius Ag Scheibenschwingmühle
CN2579523Y (zh) * 2002-09-19 2003-10-15 陈莹 内置冷却管式振动磨

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN109482313A (zh) * 2019-01-14 2019-03-19 香农工业设备制造南京有限公司 一种应用于振动研磨机的自动出料磨盘
DE102019207224A1 (de) * 2019-05-17 2020-11-19 Thyssenkrupp Ag Vorrichtung zur Zerkleinerung von Einsatzmaterial sowie Verwendung eines Kühlungsgehäuses an der Vorrichtung
WO2020234062A1 (fr) 2019-05-17 2020-11-26 Thyssenkrupp Industrial Solutions Ag Dispositif de concassage d'un produit de départ et utilisation d'un carter de refroidissement sur le dispositif

Also Published As

Publication number Publication date
WO2008028883A1 (fr) 2008-03-13
AU2007293940B2 (en) 2011-04-14
EP2061600A1 (fr) 2009-05-27
CN101557876B (zh) 2012-06-13
AU2007293940A1 (en) 2008-03-13
DE102006042825A1 (de) 2008-03-27
CN101557876A (zh) 2009-10-14
ATE513618T1 (de) 2011-07-15
ES2364592T3 (es) 2011-09-07

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