EP1724021A1 - Broyeur à agitateur - Google Patents

Broyeur à agitateur Download PDF

Info

Publication number
EP1724021A1
EP1724021A1 EP05010814A EP05010814A EP1724021A1 EP 1724021 A1 EP1724021 A1 EP 1724021A1 EP 05010814 A EP05010814 A EP 05010814A EP 05010814 A EP05010814 A EP 05010814A EP 1724021 A1 EP1724021 A1 EP 1724021A1
Authority
EP
European Patent Office
Prior art keywords
grinding
mahlhilfskörper
agitator mill
grinding chamber
mill 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.)
Withdrawn
Application number
EP05010814A
Other languages
German (de)
English (en)
Inventor
Norbert Dr.-Ing. Stehr
Philipp Schmitt
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
Priority to EP05010814A priority Critical patent/EP1724021A1/fr
Priority to US11/169,921 priority patent/US7243866B2/en
Publication of EP1724021A1 publication Critical patent/EP1724021A1/fr
Withdrawn legal-status Critical Current

Links

Images

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
    • B02C17/161—Arrangements for separating milling media and ground material
    • 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
    • B02C17/166—Mills in which a fixed container houses stirring means tumbling the charge of the annular gap type

Definitions

  • the invention relates to a stirred mill according to the preamble of claim 1.
  • the return channels are formed in a stepped ring portion which may be integrally formed with a rotor bottom, but which may also be screwed to this.
  • the Mahlosterrorism return channels are rectilinear and have over their full length from their inlet to their outlet opening constant width. They are - viewed from the inside out - employed against the direction of rotation of the rotor.
  • the separator is rotatably formed.
  • the invention is therefore the object of an agitator mill of the generic type in such a way that with simple design means a narrow regrind particle size distribution is achieved at both large and small grinding stock throughputs.
  • the grinding aid return channels formed in the grinding aid body feedback module designed as an independent component can be optimized in their overall shape.
  • the shaping of the channels can be produced in a simple manner in terms of production since the channels are open towards an end face. Due to the design of the Mahlos redesign-return module, it is possible to optimize the cross-sections and in particular the axial extent of Mahlos stresses-return channels and thus to adapt concrete applications.
  • the height of the grinding aid return channels can be made small relative to the height of the separating device, with the consequence that the risk of grinding stock particle Throughput is low.
  • the Mahlös stresses return channels can also be formed rectilinear. Such low flow rates occur in particular in the so-called one-pass operation, that is, if the material to be ground with a correspondingly high residence time in the mill this happens only once.
  • the Mahlosterrorism return channels must have a correspondingly large cross section, which is achieved by a relatively large height in the axial direction relative to the height of the separator. In this case, it is advantageous for avoiding auxiliary grinding body passages if the grinding aid return channels are curved.
  • Such large grinding material throughputs occur, for example, in the circulation operation, that is, if the material to be ground is repeatedly driven through the agitator mill.
  • such relatively large grinding stock throughputs if true the regrind particle size distribution high demands are made, but no ultrafine grinding is required.
  • the height of the grinding aid body return channels in the direction of the central longitudinal axis can be made relatively small in the direction of the central longitudinal axis owing to the design of the grinding aid body return channels in the auxiliary grinding body return module, the danger of a passage through the grinding stock particles can be reduced. without a good separation of Mahlospian is affected by the material to be ground.
  • the inner stator is provided in the region of the outflow channel according to claim 11 with a wear protection, which is particularly advantageous if the gap width of the outflow channel does not increase to the separator, ie radially inwardly that is, if the flow cross-section is reduced with a corresponding acceleration of the Mahlgut Mahlos stresses flow.
  • the agitator mill shown in Fig. 1 has in the usual way a stand 1, to which a cylindrical grinding container 2 can be attached.
  • an electric drive motor 3 is housed, which is provided with a V-belt pulley 4, of which via V-belt 5 with a drive shaft 6 rotatably connected V-belt pulley 7 is rotationally driven.
  • the grinding container 2 consists of a cylindrical inner wall 9 surrounding a grinding chamber 8, which is surrounded by a substantially cylindrical outer jacket 10.
  • the lower wall of the grinding chamber 8 is formed by an annular bottom plate 12, which is fastened to the grinding container 2 by means of screws 13.
  • the grinding container 2 has an upper annular flange 14, by means of which it is attached to the underside of a support housing 15 by means of screws 16 which is mounted on the stator 1 of the agitator mill.
  • the grinding chamber 8 is closed by means of a lid 17.
  • the support housing 15 has a central bearing and seal housing 18 which is coaxial with the central longitudinal axis 19 of the grinding container 2 is arranged. This bearing and seal housing 18 is penetrated by the likewise coaxial to the axis 19 extending drive shaft 6, to which a stirrer 20 is mounted. In the grinding chamber 8 adjacent region of the bearing and seal housing 18 opens a regrind supply line 21 a.
  • cylindrical inner stator 22 On the annular bottom plate 12 a projecting into the grinding chamber 8, approximately cup-shaped, cylindrical inner stator 22 is attached, consisting of a grinding chamber 8 bounding, coaxial to the axis 19, cylindrical outer shell 23 and a likewise coaxial to the axis 19, cylindrical inner shell 24 exists. They define a cooling space 25 between them.
  • the cooling space 25 is connected to a cooling space 26 in the bottom plate 12, to which cooling water is supplied via a cooling water supply port 27, which is discharged via a cooling water discharge port 28.
  • the cooling space 11 of the grinding container 2 is supplied with cooling water via a cooling water supply pipe 29, which is discharged via a cooling water discharge pipe 30.
  • a Mahlgut Mahltosève-separating device 32 is arranged, which is connected to a regrind discharge line 33. Between the separator 32 and the drain line 33, a grinding stock hopper 34 is provided.
  • the drain line 33 is provided in the region of the bottom plate 12 with a mounting bracket 35, which is releasably connected by means of screws 36 with the bottom plate 12 and the fixedly connected to this inner stator 22.
  • the separating device 32 is sealed relative to the annular end part 31 of the inner stator 22 by means of a seal 37 and, after loosening the screws 36 together with the drain line 33 and the collecting funnel 34 from the inner stator 22 are pulled down.
  • the separating device 32 can thus be pulled out of the grinding chamber 8, without the Mahlospian located in this 38 must be removed from the grinding chamber 8, since the filling of the grinding chamber 8 with these Mahlos stressesn 38 with non-driven agitator 20 does not reach to the front part 31.
  • the agitator 20 is pot-shaped in its basic structure, d. H. it has a substantially annular cylindrical rotor 39.
  • the rotor 39 has a cylindrical inner wall 41, which has a cylindrical outer wall 40 and a coaxial with it and coaxial with the axis 19.
  • the outer wall 40 and the inner wall 41 are smooth-walled and formed as closed surfaces, so have no openings.
  • a cooling space 42 is formed between the outer wall 40 and the inner wall 41 of the rotor 39.
  • the agitator 20 is provided with a cover-like termination part 43, to whose bottom side facing the rotor 39, a closure plate 44 is attached.
  • the termination part 43 and the end plate 44 are attached to the drive shaft 6.
  • a Mahlospian-return module 45 is arranged between the rotor 39 and the end plate 44 of the agitator 20, a Mahlospian-return module 45 is arranged.
  • the rotor 39, the return module 45 and the end plate 44 are detachably connected together by tie rods 46.
  • an outer grinding chamber 8a is formed.
  • an inner grinding chamber 8b is limited.
  • this inner grinding chamber 8b protrude on the outer surface 23 of the inner stator 22 mounted, designed as a pin-shaped tools 49 surveys in which - as is apparent in particular from Fig. 4 - are arranged helically over the circumference and the length of the outer shell 23.
  • adjacent tools 49 are arranged overlapping one another in the circumferential direction of the inner stator 22 in the direction of the central longitudinal axis 19, so that during a rotation of the rotor 39 its inner wall 41 is completely swept by the tools 49 ,
  • the grinding chamber 8 is thus divided into a cylindrical outer grinding chamber 8a on the one hand and a cylindrical annular grinding chamber 8b on the other hand, connected by a constantly widening from outside to inside deflection space 50 in the vicinity of the bottom plate 12 are.
  • the cylindrical separator 32 consists of a stack of annular disks 51, between each of which a separating gap 52 is left free, the width of which is generally smaller than the diameter of the smallest grinding auxiliary body 38 used; However, the width can also be greater, since the separation of the Mahlos stresses 38 takes place before reaching the separator 32.
  • the stack of annular discs 51 is the end side, ie at the end plate 44 facing side, completed by a closure plate 53.
  • the separator 32 is disposed within the return module 45.
  • the return channels 54 extend in the direction of the axis 19 almost over the full height of the return module 45, wherein its axial height e is greater than the axial height f of the separator 32.
  • Die Return channels 54 extend in this embodiment except via the separator 32 in the direction of the axis 19 still obliquely upward from the upper end of the inner grinding chamber 8b and inside to the separator 32 leading, so tapering in the direction of the end plate 44 towards frustoconical Outflow channel 59.
  • the return channels 54 are also open to the outflow channel 59, as Fig. 2 reveals.
  • the outflow channel 59 is therefore not spatially limited upwards. Rather, it is open in the direction of the central longitudinal axis 19 towards the internal grinding chamber 8b and thus for the outlet of the grinding auxiliary bodies 38 permeable, while the ground material flows through the outflow channel 59 in the direction of the separator 32.
  • the material to be ground flows through the grinding chamber 8 corresponding to the flow direction arrows 60 coming from the grinding material supply line 21 through a Mahlgut feed chamber 61 between the end portion 43 of the agitator 20 on the one hand and the lid 17 and the adjacent region of the inner wall 9 on the other hand, the grinding material feed Area 57, the outer grinding chamber 8a down, through the constantly expanding deflection space 50 radially inwardly and from there through the inner grinding chamber 8b up to the outflow channel 59 and from there to the separator 32.
  • the material to be ground is milled in a rotationally driven agitator 20 in cooperation with the auxiliary grinding bodies 38.
  • the ground material leaves the interior grinding chamber 8 b through the separating device 32, from where it flows through the grinding stock discharge line 33.
  • FIGS. 6 and 7 differs from that of FIGS. 2 to 5 essentially in that between the end plate 44 and the rotor 39 except a Mahltosterrorism-return module 45 'still a jam device 62 as part the agitator 20 'is provided.
  • a Mahltospian-return module 45 still a jam device 62 as part the agitator 20 'is provided.
  • the inner grinding chamber 8b does not open at its upper end directly into the return channels 54 ', but instead feeds the grinding material.
  • Mahltosêt mixture is forced by the jam device 62 obliquely upwards and inwards in the direction of the separator 32 '.
  • the gap width j of the outflow channel 59 ' is constant.
  • the separating device 32 'does not extend over the full area above the end portion 31. Rather, a closed ring portion is provided as wear protection 63 between the end portion 31 and the separator 32', which is formed integrally with the separator 32 '.
  • a closed ring portion is provided as wear protection 63 between the end portion 31 and the separator 32', which is formed integrally with the separator 32 '.
  • the embodiment according to FIG. 8 differs from that according to FIGS. 6 and 7 only in that the grinding aid return channels 54 "have a minimum required height e" for trouble-free operation at low grinding stock throughputs. Otherwise, the Mahlos 1968 feedback module 45 "includes here to the jam device 62, wherein in this embodiment, as in the two aforementioned embodiments, the return channels 54 "are bounded at their top by the end plate 44. However, the axial height k is the same for the return modules 45 'and 45".
  • FIG. 9 corresponds to that of FIG. 6 with the difference that no wear protection 63 is provided and that on the other hand, the outflow channels 59 '' 'to Mahlcouspian-separating device 32 towards expand, d. H. the gap width j '' 'of the outflow channel 59' 'increases towards the inside, to such an extent that the total cross-sectional area of this channel 59' '' in the direction of the separator 32 in any case does not become smaller, so that no acceleration of the ground material For this reason, the separator 32 may extend to the end portion 31, since the Mahlos emotions 38 do not impinge on the separator 32. Die Mahlos Congress 38sammlung in die Abström-Kanal 59 '' 'anrob.
  • FIG. 10 substantially corresponds to that of FIG. 9, wherein the Mahlcous emotions feedback module 45 '''' is not brought up to the separator 32.
  • the inlet openings 55 '''' of Mahlos emotions-return channels 54 '''' thus have a significant radial distance from the separator 32.
  • a plurality of scrapers 65 are provided, which are attached to the end plate 44 and rotate with the agitator 20 ''''.
  • the exemplary embodiment according to FIGS. 11 to 13 has a grinding aid body return module 45 '' '' 'which rests against an accumulation ring 66 towards the accumulation device 62.
  • the module 45 '' '' ' is thus down to the grinding chamber 8, ie to an end face 67, open.
  • the axial height e '' '' ' is constant from the respective inlet opening 55' '' '' to the outlet opening 56 '' ''' 'and significantly smaller than the height f' of the separator 32 '.
EP05010814A 2005-05-19 2005-05-19 Broyeur à agitateur Withdrawn EP1724021A1 (fr)

Priority Applications (2)

Application Number Priority Date Filing Date Title
EP05010814A EP1724021A1 (fr) 2005-05-19 2005-05-19 Broyeur à agitateur
US11/169,921 US7243866B2 (en) 2005-05-19 2005-06-30 Agitator mill

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
EP05010814A EP1724021A1 (fr) 2005-05-19 2005-05-19 Broyeur à agitateur

Publications (1)

Publication Number Publication Date
EP1724021A1 true EP1724021A1 (fr) 2006-11-22

Family

ID=34936666

Family Applications (1)

Application Number Title Priority Date Filing Date
EP05010814A Withdrawn EP1724021A1 (fr) 2005-05-19 2005-05-19 Broyeur à agitateur

Country Status (2)

Country Link
US (1) US7243866B2 (fr)
EP (1) EP1724021A1 (fr)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP4032615A1 (fr) 2021-01-25 2022-07-27 Wilhelm Niemann GmbH & Co KG Broyeur agitateur

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20090212141A1 (en) * 2005-06-08 2009-08-27 Alan Taylor Milling apparatus
CN102164676B (zh) * 2008-07-10 2014-10-29 菲活机器制造公司 带有分离器的珠磨机

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0439826A1 (fr) * 1990-01-30 1991-08-07 Draiswerke GmbH Mélangeur-broyeur
DE4142213A1 (de) * 1991-12-20 1993-06-24 Draiswerke Gmbh Ruehrwerksmuehle

Family Cites Families (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE29814714U1 (de) * 1998-08-17 1998-12-10 Draiswerke Gmbh Rührwerksmühle

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0439826A1 (fr) * 1990-01-30 1991-08-07 Draiswerke GmbH Mélangeur-broyeur
DE4142213A1 (de) * 1991-12-20 1993-06-24 Draiswerke Gmbh Ruehrwerksmuehle

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP4032615A1 (fr) 2021-01-25 2022-07-27 Wilhelm Niemann GmbH & Co KG Broyeur agitateur
DE102021101527A1 (de) 2021-01-25 2022-07-28 Wilhelm Niemann Gmbh & Co. Rührwerksmühle
DE102021101527B4 (de) 2021-01-25 2023-05-17 Wilhelm Niemann Gmbh & Co. Rührwerksmühle

Also Published As

Publication number Publication date
US20060261199A1 (en) 2006-11-23
US7243866B2 (en) 2007-07-17

Similar Documents

Publication Publication Date Title
EP1943022B1 (fr) Broyeur melangeur
EP2178642B1 (fr) Broyeur agitateur
EP1724022B1 (fr) Broyeur à agitateur
EP0058886B1 (fr) Broyeur agitateur
EP2036613B1 (fr) Broyeur à billes à agitateur
DE4432200C1 (de) Rührwerksmühle
EP2178643B1 (fr) Broyeur agitateur
EP3311922B1 (fr) Broyeur à billes à agitateur
DE2020649B2 (de) Rührwerksmühle zum Dispergieren von Festkörperteilchen in einem flüssigen Trager
EP0913200B1 (fr) Broyeur agitateur
EP0824964B1 (fr) Broyeur agitateur
EP0439826A1 (fr) Mélangeur-broyeur
EP3573762B1 (fr) Broyeur agitateur
EP1724021A1 (fr) Broyeur à agitateur
EP0700724B2 (fr) Procédé et appareil pour le broyage continu autogène d'une matière à traiter fluide
EP0645179B1 (fr) Moulin à frottement et malaxeur contenant ledit moulin
CH687238A5 (de) Ruehrwerksmuehle.
DE4142213C2 (de) Rührwerksmühle
EP1238707B1 (fr) Broyeur agitateur avec fente de broyage toroidale
DE19834397B4 (de) Rührwerksmühle
WO2021063995A1 (fr) Broyeur agitateur
EP0448100A1 (fr) Broyeur-mélangeur
EP0672455B1 (fr) Dispositif de séparation par voie humide
EP1206971B1 (fr) Broyeur agitateur
EP3946741B1 (fr) Broyeur à boulets à agitateur

Legal Events

Date Code Title Description
PUAI Public reference made under article 153(3) epc to a published international application that has entered the european phase

Free format text: ORIGINAL CODE: 0009012

AK Designated contracting states

Kind code of ref document: A1

Designated state(s): AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HU IE IS IT LI LT LU MC NL PL PT RO SE SI SK TR

AX Request for extension of the european patent

Extension state: AL BA HR LV MK YU

AKX Designation fees paid
STAA Information on the status of an ep patent application or granted ep patent

Free format text: STATUS: THE APPLICATION IS DEEMED TO BE WITHDRAWN

18D Application deemed to be withdrawn

Effective date: 20070523

REG Reference to a national code

Ref country code: DE

Ref legal event code: 8566