EP0700721A1 - Broyeur agitateur - Google Patents

Broyeur agitateur Download PDF

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Publication number
EP0700721A1
EP0700721A1 EP95112853A EP95112853A EP0700721A1 EP 0700721 A1 EP0700721 A1 EP 0700721A1 EP 95112853 A EP95112853 A EP 95112853A EP 95112853 A EP95112853 A EP 95112853A EP 0700721 A1 EP0700721 A1 EP 0700721A1
Authority
EP
European Patent Office
Prior art keywords
grinding
regrind
agitator
outlet opening
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.)
Granted
Application number
EP95112853A
Other languages
German (de)
English (en)
Other versions
EP0700721B1 (fr
Inventor
Norbert Dr Stehr
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.)
Draiswerke GmbH
Original Assignee
Evv-Vermogensverwaltungs-Gmbh
Draiswerke GmbH
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Filing date
Publication date
Application filed by Evv-Vermogensverwaltungs-Gmbh, Draiswerke GmbH filed Critical Evv-Vermogensverwaltungs-Gmbh
Publication of EP0700721A1 publication Critical patent/EP0700721A1/fr
Application granted granted Critical
Publication of EP0700721B1 publication Critical patent/EP0700721B1/fr
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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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
    • B02C17/16—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

Definitions

  • the invention relates to an agitator mill according to the preamble of claim 1.
  • this embodiment of the known agitator mill means that a reliable grinding aid circulation cannot be achieved.
  • the grinding aid bodies settle in the grinding aid body return line and remain there.
  • this type of agitator mill has not been able to prevail in practice since Grinding aid circulation did not work.
  • a ball mill for dry grinding is known from US Pat. No. 2,595,117.
  • the ground material and the grinding media are discharged together through a discharge line and brought into a vertical air line that serves as an air classifier.
  • This vertical air line blows air from below, which conveys all smaller particles into a separator.
  • the grinding balls and large pieces of ground material fall down against the air flow and are returned to the mill by means of a screw conveyor.
  • the separator again separates enough finely ground material and not yet ground enough ground material. The latter is also fed to the screw through a line.
  • the invention has for its object to design an agitator mill of the generic type so that a reliable circulation of the auxiliary grinding bodies is achieved.
  • FIGS. 1 and 2 A so-called horizontal agitator mill is shown in FIGS. 1 and 2.
  • this has a stand 1 which is supported on the base 2.
  • a support arm 4 On the front 3 of the stand 1, a support arm 4 is attached.
  • the drive shaft 9 is rotatably supported in the stand 1 by means of a plurality of bearings 10.
  • An essentially cylindrical grinding container 12 is supported on the support arm 4 in corresponding receptacles 11.
  • the grinding container 12 has a cylindrical wall 13 and is closed at one end facing the stand 1 by means of a cover 14 and at the opposite end by means of a base 15. It encloses a grinding room 16.
  • An agitator shaft 18, which passes through the cover 14, is arranged in the grinding chamber 16 concentrically to the common central longitudinal axis 17 of the grinding container 12 and the drive shaft 9.
  • the grinding chamber 16 is sealed by means of seals 19 between the cover 14 and the shaft 18.
  • the shaft 18 is overhung, that is, it is no longer supported in the region of the bottom 15. It is provided over its length in the grinding chamber 16 with stirring tools 20, which in the present case are stirring disks 21, 21a.
  • the stirring disks 21, 21a can - as shown in Fig. 2 - be additionally provided with openings 22 and 22a.
  • the grinding chamber 16 is filled at least to a substantial extent with auxiliary grinding bodies 23.
  • a regrind auxiliary body feed opening 24 opens into the grinding chamber 16, which is formed in the cover 14.
  • a grinding auxiliary body outlet opening 25 opens out of the grinding chamber 16 and is arranged in a common radial plane with the last stirring tool 20 attached to the agitator shaft 18, ie the last stirring disk 21a .
  • the last stirring disk 21a has a larger diameter than the other stirring disks 21, so that it leaves only a relatively small annular space 26 to the wall 13 of the grinding container 12.
  • the width a of this annular space 26 radially to the central longitudinal axis 17 is 10 to 50 mm.
  • the width b of the stirring disc 21a in the direction of the axis 17 is also greater than the corresponding width of the other stirring discs 21, as is also apparent from FIG. 1.
  • the width b is at least as large as the width c of the grinding aid outlet opening 25 in the direction of the central longitudinal axis 17, so that the stirring disc 21a with its cylindrical circumference 27 completely covers the grinding aid outlet opening 25 in the direction of the axis 17.
  • the agitator disc 21a thus has a larger diameter and a greater width in the direction of the axis 17 than the agitator discs 21.
  • This agitator disc 21a arranged in front of the auxiliary grinding device outlet opening 25 thus has the function of a cylinder agitator in this limited area, while in the grinding chamber 16 there is an agitator disc .
  • auxiliary grinding device retaining devices 28 in the form of so-called sieve cartridges 29 are arranged, which are held in corresponding connections 30 in the wall 13 of the grinding container 12 and out of the latter from the grinding chamber 16 can be pulled out.
  • Screen cartridges 29 of this type are known in agitator mills, for example from DE-PS 20 37 258 (corresponding to US Pat. No. 3,780,957).
  • the grinding aid outlet opening 25 is followed by a grinding aid return pipe socket 31 which, as can be seen in FIG. 2, is guided upward essentially tangentially in a radial plane to the axis 17. It is arranged in such a way that the direction of rotation 32 of the circumference 27 of the stirring disk 21a is directed tangentially into it.
  • This grinding aid return pipe socket 31 is designed as a pipe elbow deflected by 90 °, which leads to a grinding material supply and grinding aid return pipe 34 which runs in a straight line and parallel to the axis 17 and is arranged next to the upper side 33 and directly next to the wall 13 of the grinding container 12 transforms. This line 34 is connected via a 180 ° pipe elbow 35 to the regrind auxiliary body feed opening 24.
  • a regrind feed line 36 opens into the pipe socket 31, aligned with the line 34, the inside diameter d of which is smaller than the inside diameter D of the regrind supply and grinding aid return line 34 and of the pipe socket 31 the line 34 and in the pipe socket 31 higher flow rate in the regrind feed line 36 is reached.
  • This higher flow rate causes a good distribution of the auxiliary grinding bodies 23 in the material to be ground and thus a pronounced hydraulic Transport of the auxiliary grinding bodies 23 and prevents backflow of the auxiliary grinding bodies 23 into the pipe socket 31.
  • the grinding material supply line 36 can also be formed in one piece or in one piece with the line 34.
  • a shut-off element 37 in the form of a slide, a valve or an adjustment throttle, which can serve as a starting aid, is arranged in the auxiliary grinding body return pipe socket 31.
  • the regrind feed line 36 is fed in the usual manner by means of a pump 38 from a storage container 39, which passes through the regrind feed and regrind auxiliary return line 34 and the 180 ° pipe elbow 35 into one end of the grinding container 12.
  • a pump 38 passes through the regrind feed and regrind auxiliary return line 34 and the 180 ° pipe elbow 35 into one end of the grinding container 12.
  • the grinding stock together with the auxiliary grinding bodies 23 is subjected to an intensive dispersing, grinding and shearing process by the high-speed stirring tools 20, this mixture flowing through the grinding chamber 16 in the direction of the outlet opening 25 and the retaining devices 28.
  • the ground material is withdrawn to the outside by the retention devices 28 and, if appropriate, fed back to the storage container 39 via a discharge line 40.
  • the auxiliary grinding bodies 23 are thrown into the pipe socket 31 in front of the retaining devices 28 by means of the stirring disk 21a arranged in front of the outlet opening 25. They flow through the very short curved pipe socket 31 to the junction 41 of the feed line 36 into the regrind feed and regrind body return line 34.
  • the regrind flow fed through the regrind feed line 36 takes over the return transport of the regrind bodies 23 to the feed opening 24, ie back into the Grinding chamber 16.
  • the described combination of the feed line 36, the pipe socket 31 and the line 34 in the confluence point 41 and the very short design of the pipe socket 31 ensure that no ground material is short-circuited from the supply line 36 and the pipe socket 31 into the grinding chamber 16 and from there into the separating devices 28.
  • a grinding aid outlet opening 25 ' is formed in the cylindrical wall 13' near the bottom 15 '.
  • a cage-like section 43 is formed which has a closed disk 44 which is attached to the agitator shaft 18'.
  • an annular disc 45 is provided, which is also arranged concentrically to the central longitudinal axis 17. This ring disk 45 is located directly next to the bottom 15 '.
  • the disk 44 and the annular disk 45 are connected to one another in the region of their outer circumferences by means of a cylindrical wall 46.
  • regrind inflow channels 47 are formed which, based on the direction of rotation 32 of the agitator shaft 18 ', are designed to lead from the outside inwards, as can be seen in FIG. 4.
  • a cylindrical sieve 49 which passes through the bottom 15 ′ and the annular disk 45, projects as a grinding aid retaining device 28.
  • the inner edge 50 of the washer 45 is approximately free of play relative to the cylinder sieve 49, so that no auxiliary grinding bodies 23 can enter the interior 48 here.
  • the cage-like section 43 has a width b 'in the direction of the axis 17, which is greater than the width c' of the outlet opening 25 'in the direction of the axis 17. This width c' corresponds approximately to the extent e of the interior 48 in the direction of the axis 17.
  • the annular space 26 'between the substantially cylindrical circumference 27' of the cage-like section 43 has a width a 'for which the details relating to the embodiment according to FIGS. 1 and 2 apply.
  • the cage-like section 43 can also be regarded as a hollow stirring disk which is particularly thick in the direction of the axis 17.
  • the grinding aid outlet opening 25 ' which is elongated in the direction of the axis 17, is adjoined by a roughly box-shaped grinding aid return pipe socket 31' in the side view according to FIGS. 3 and 5, the actual position of the grinding container 12 'in FIGS. 4 and 5 is removable. In Fig. 3 it is shown offset radially outward to allow a longitudinal section.
  • the function of the agitator mill according to FIGS. 3 to 5 differs from the embodiment according to FIGS. 1 and 2 only in that the regrind at the end of the grinding chamber 16 fully enters the annular space 26 'with the grinding auxiliary body 23, from where it is directed according to the flow direction arrows 51 through the regrind inflow channels 47 into the interior 48 of the cage-like section 43.
  • the auxiliary grinding bodies 23 are pressed through the outlet opening 25 'into the very short pipe socket 31' and taken over by the regrind at the junction 41 of the regrind supply line 36 and then hydraulically transported again through line 34 to the regrind auxiliary body supply opening 24.
  • the regrind exits through the retention device 28 and is possibly transported back to the storage container 39 through an only indicated discharge line 40.
  • FIGS. 6 and 7 show a further embodiment of a horizontal agitator mill, which in many areas corresponds to the horizontal agitator mill according to FIGS. 3 and 5. Identical parts are therefore identified with identical reference numerals and functionally identical, but structurally but slightly different parts with the same reference numerals, which, however, are provided with a double prime. There is no need for a renewed description.
  • the auxiliary grinding body outlet opening 25 ′′ is located in the upper region of the base 15 ′′ of the grinding container 12 ′.
  • the annular space 26 "between the cage-like section 43" and the cylindrical wall 13 "of the grinding container 12" is larger than in the agitator mill according to FIGS.
  • the width a ′′ of the annular space 26 ′′ radial to the axis 17 is 25 to 100 mm.
  • the grinding aid outlet opening 25 ′′ is followed by a grinding aid return pipe connection piece 31 ′′ designed as a 180 ° pipe elbow, which merges into line 34 at the junction point 41. 6, this pipe socket 31 ′′ is shown offset with respect to the line 34 in order to be able to represent it in this figure.
  • the material to be ground flows through the grinding chamber 16 together with the auxiliary grinding bodies 23 and enters the relatively wide annular space 26 ′′.
  • the regrind enters the interior 48 of the cage-like section 43 ′′ through the channels 47 and flows out through the cylinder sieve 49.
  • the auxiliary grinding bodies 23 are discharged from the grinding chamber 16 through the outlet opening 25 ′′ and fed to the hydraulic return transport via the pipe socket 31 ′′.
  • the regrind can be circulated over the storage container 39.
  • FIG. 8 shows a so-called standing agitator mill, which in many areas corresponds structurally to the lying agitator mill according to FIGS. 1 and 2. Identical parts are therefore identified with identical reference numerals and functionally identical, but structurally but slightly different parts with the same reference numerals, which, however, are provided with a triple prime. There is no need for a renewed description.
  • the standing agitator mill according to FIG. 8 differs from that according to FIG. 1 in that the regrind auxiliary body feed opening 24 is located in the bottom 15 '''of the substantially vertically arranged grinding container 12'''.
  • the grinding aid outlet opening 25 is arranged adjacent to the top cover 14 '''. This also applies to the auxiliary grinding device retention device 28.
  • the regrind feed line In this case, 36 is directed downward from an area above the grinding container 12 ′′ ′′ to the grinding material supply and grinding aid body return line 34.
  • the agitator disk 21a adjacent to the cover 14 ''' is located radially to the axis 17 in front of the grinding aid outlet opening 25.
  • the function is the same as in the embodiment according to FIGS. 1 and 2, but with the grinding stock and grinding aid through the Flow the grinding chamber 16 upwards from the bottom 15 '''towards the cover 14'''.
EP95112853A 1994-09-09 1995-08-16 Broyeur agitateur Expired - Lifetime EP0700721B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE4432198 1994-09-09
DE4432198A DE4432198A1 (de) 1994-09-09 1994-09-09 Rührwerksmühle

Publications (2)

Publication Number Publication Date
EP0700721A1 true EP0700721A1 (fr) 1996-03-13
EP0700721B1 EP0700721B1 (fr) 1999-11-24

Family

ID=6527850

Family Applications (1)

Application Number Title Priority Date Filing Date
EP95112853A Expired - Lifetime EP0700721B1 (fr) 1994-09-09 1995-08-16 Broyeur agitateur

Country Status (7)

Country Link
US (1) US5544825A (fr)
EP (1) EP0700721B1 (fr)
JP (1) JPH0889833A (fr)
CN (1) CN1118282A (fr)
AU (1) AU691639B2 (fr)
BR (1) BR9503979A (fr)
DE (2) DE4432198A1 (fr)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE19630186B4 (de) * 1996-07-26 2007-11-15 BüHLER GMBH Rührwerksmühle

Families Citing this family (15)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE69621352T2 (de) * 1996-11-22 2003-03-06 Toyo Ink Mfg Co Dispergiervorrichtung
DE19713765A1 (de) * 1997-04-03 1998-10-08 Bayer Ag Rührwerkkugelmühle mit umlaufenden Mahlkörpern
DE19839210B4 (de) * 1998-08-28 2007-09-06 BüHLER GMBH Rührwerksmühle
DE19912594B4 (de) * 1999-03-20 2008-01-31 Zoz Gmbh Vorrichtung zur Hochenergie- und/oder Feinstmahlung von Feststoffen
JP2006212488A (ja) * 2005-02-01 2006-08-17 Ashizawa Finetech Ltd 媒体攪拌型粉砕装置
JP2006212489A (ja) * 2005-02-01 2006-08-17 Ashizawa Finetech Ltd 媒体攪拌型粉砕装置を用いる粉砕方法
JP4953805B2 (ja) * 2006-12-28 2012-06-13 アシザワ・ファインテック株式会社 媒体攪拌型粉砕装置
EP2246113A1 (fr) * 2009-04-29 2010-11-03 Sandvik Intellectual Property AB Processus pour le broyage de cermet ou mélanges de carbure cimenté
DE102010052656A1 (de) * 2010-11-26 2012-05-31 Netzsch-Feinmahltechnik Gmbh Hydraulische Mahlkugel Zu- und Abfuhr für Rührwerkskugelmühlen
CN102284328B (zh) * 2011-07-19 2014-07-02 无锡新光粉体加工工艺有限公司 循环型高速多叶轮超细粉体研磨机
CN104722367B (zh) * 2013-12-20 2017-07-07 无锡新光粉体科技有限公司 一种介质搅拌型湿法研磨分散装置
EP3311922B1 (fr) * 2016-10-18 2018-12-05 Willy A. Bachofen AG Broyeur à billes à agitateur
DK3311921T3 (en) * 2016-10-18 2019-01-14 Bachofen Willy A Ag Stirring Ball Mill
WO2018112705A1 (fr) * 2016-12-19 2018-06-28 陈强 Broyeur à boulets à agitation
CN107321205A (zh) * 2017-08-08 2017-11-07 安庆泽远化工有限公司 一种贝壳粉生态干粉涂料磁球搅拌系统

Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2595117A (en) 1950-03-08 1952-04-29 Smidth & Co As F L Method and apparatus for grinding
DE3036280A1 (de) * 1980-09-26 1982-05-13 Kaspar 6800 Mannheim Engels Ruehrwerksmuehle
EP0058886A2 (fr) 1981-02-19 1982-09-01 Draiswerke GmbH Broyeur agitateur
DE3716587C1 (de) * 1987-05-18 1988-04-28 Draiswerke Gmbh Ruehrwerksmuehle
EP0376001A1 (fr) * 1988-12-30 1990-07-04 Erich Netzsch GmbH & Co. Holding KG Broyeur agitateur avec dispositif de séparation dans une cage rotative
JPH06218296A (ja) * 1993-01-25 1994-08-09 Masumi Kusunoki 攪拌ミルを有する粉砕装置

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4065060A (en) * 1976-10-06 1977-12-27 Aluminum Company Of America Metal flake production
JPH043630Y2 (fr) * 1987-01-23 1992-02-04
US5199656A (en) * 1990-10-15 1993-04-06 Union Process, Inc. Continuous wet grinding system

Patent Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2595117A (en) 1950-03-08 1952-04-29 Smidth & Co As F L Method and apparatus for grinding
DE3036280A1 (de) * 1980-09-26 1982-05-13 Kaspar 6800 Mannheim Engels Ruehrwerksmuehle
EP0058886A2 (fr) 1981-02-19 1982-09-01 Draiswerke GmbH Broyeur agitateur
US4496106A (en) 1981-02-19 1985-01-29 Draiswerke Gmbh Agitator-grinder
DE3716587C1 (de) * 1987-05-18 1988-04-28 Draiswerke Gmbh Ruehrwerksmuehle
EP0376001A1 (fr) * 1988-12-30 1990-07-04 Erich Netzsch GmbH & Co. Holding KG Broyeur agitateur avec dispositif de séparation dans une cage rotative
JPH06218296A (ja) * 1993-01-25 1994-08-09 Masumi Kusunoki 攪拌ミルを有する粉砕装置

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
PATENT ABSTRACTS OF JAPAN vol. 018, no. 588 (C - 1271) 10 November 1994 (1994-11-10) *

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE19630186B4 (de) * 1996-07-26 2007-11-15 BüHLER GMBH Rührwerksmühle

Also Published As

Publication number Publication date
EP0700721B1 (fr) 1999-11-24
AU691639B2 (en) 1998-05-21
US5544825A (en) 1996-08-13
CN1118282A (zh) 1996-03-13
BR9503979A (pt) 1996-09-24
AU3024395A (en) 1996-03-21
DE4432198A1 (de) 1996-03-14
JPH0889833A (ja) 1996-04-09
DE59507279D1 (de) 1999-12-30

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