EP0410229B1 - Broyeur agitateur pour le microbroyage - Google Patents

Broyeur agitateur pour le microbroyage Download PDF

Info

Publication number
EP0410229B1
EP0410229B1 EP90113421A EP90113421A EP0410229B1 EP 0410229 B1 EP0410229 B1 EP 0410229B1 EP 90113421 A EP90113421 A EP 90113421A EP 90113421 A EP90113421 A EP 90113421A EP 0410229 B1 EP0410229 B1 EP 0410229B1
Authority
EP
European Patent Office
Prior art keywords
grinding
grinding disks
disks
agitator mill
agitator
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.)
Expired - Lifetime
Application number
EP90113421A
Other languages
German (de)
English (en)
Other versions
EP0410229A1 (fr
Inventor
Günther Dipl.-Ing. Kuntz
Johann Dipl.-Ing. Baarfüsser
Clemens Dipl.-Ing. Beck
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.)
Basf Magnetics basf Magnetics (holding) GmbH GmbH
Original Assignee
BASF Magnetics GmbH
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 BASF Magnetics GmbH filed Critical BASF Magnetics GmbH
Publication of EP0410229A1 publication Critical patent/EP0410229A1/fr
Application granted granted Critical
Publication of EP0410229B1 publication Critical patent/EP0410229B1/fr
Anticipated expiration legal-status Critical
Expired - Lifetime 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
    • B02C17/163—Stirring means
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01F—MIXING, e.g. DISSOLVING, EMULSIFYING OR DISPERSING
    • B01F27/00—Mixers with rotary stirring devices in fixed receptacles; Kneaders
    • B01F27/05—Stirrers
    • B01F27/11—Stirrers characterised by the configuration of the stirrers
    • B01F27/115—Stirrers characterised by the configuration of the stirrers comprising discs or disc-like elements essentially perpendicular to the stirrer shaft axis

Definitions

  • the invention relates to an agitator mill for ultra-fine grinding of a grinding material dispersion consisting of solids or solid mixtures, which consists of a cylindrical container for holding grinding material and grinding media, in which a rotating stirrer shaft is provided, to which a plurality of circular grinding disks acting as stirring elements are attached, at least one of which Part of the grinding disks is attached directly to the agitator shaft off-center and offset in relation to one another in the axial direction, and the edge surfaces of the grinding disks are chamfered.
  • Such an agitator mill is known for example from SU-A-1 384 332.
  • agitator ball mills with vertically or horizontally arranged grinding troughs are used.
  • Devices of this type consist of a vertically arranged grinding trough in which agitators are fitted, on which smooth disks, annular disks, perforated disks or stirring rods or the like are arranged. All of these designs have one fundamental disadvantage in common, which is that the high-speed mixing units have a continuously increasing peripheral speed from the center to the periphery. At the periphery, the peripheral speed is to be designed so that the grinding and dispersion effect is achieved, but that the grinding media themselves are not or only insignificantly stressed or even destroyed.
  • the stress on the material to be ground and thus also on the grinding media essentially depends on the difference in speed between the stirring tool and the grinding media from.
  • the grinding effect that can be achieved in the case of the continuously operating agitator mills that are mainly considered also depends on the fact that there are no zones of insufficient dispersing stress remaining on the millbase.
  • the distance between the stirring discs and the inner wall of the grinding troughs must therefore be kept within certain limits.
  • the grinding trough is double-walled for cooling purposes and has an inlet and an outlet for the material to be treated.
  • a filter device for example in the form of a slot or sieve, is also provided, through which the grinding media are retained, but the treated product can pass through.
  • Agitator mills with a hollow, cooled agitator shaft are also known, in particular for processing highly viscous and temperature-sensitive ground material.
  • the outer edge design of the stirring disks has a non-circular shape deviating from the circular cross section of the grinding trough, for example tooth shape, wherein the outer edge of the stirring disks can have a bevel in the direction of the axis of the agitator shaft.
  • DE-A-24 57 609 describes an agitator mill whose agitator shaft is formed by a conical hollow body which tapers downwards.
  • DE-A-26 50 441 describes stirring disks, which are equipped with a Number of elongated openings, which are preferably circularly distributed around the central axis of the disk in question, are provided for taking the grinding media with them. A beveled leading edge is provided in the axial direction at each end of these elongated openings.
  • DE-A-12 07 191 describes ring disks which act as stirring elements and which are fastened off-center on the agitator shaft and offset relative to one another as seen in the axial direction.
  • these ring eccentrics have the disadvantage that, due to the centrifugal force, a cavity can arise in the interior of the grinding vessel, which considerably reduces the effectiveness of the fine grinding.
  • DE-A-12 11 906 ring disks are known, which are designed as a helical surface. The same problems as described above occur with the fine grinding with these stirring elements.
  • DE-A-21 64 286 describes eccentrically arranged circular stirring elements which have edges pointing upwards or downwards at the edges.
  • SU-A-1 384 332 describes eccentrically mounted grinding disks with bevelled edges in one direction.
  • From DE-A-16 07 533 eccentrically mounted solid disks are also known, which are provided on one or both outer surfaces with concentric bead-like ribs.
  • the task was to enable an agitator mill of the generic type mentioned at the outset, even with a high degree of ball filling, by means of an optimized axial and radial conveyance of the ground material and the grinding media, without ball blocking. At the same time, this funding should take place in a mill cascade connected in series, if possible without additional pump systems.
  • the grinding disk is provided on one or both sides with one or more eccentrically circumferential beveled active surfaces, as can be seen from FIGS. 1a to 1c.
  • the grinding disc (1) according to the invention is a circular solid disc with an eccentrically mounted bore (5) for plugging onto the agitator shaft (6) (FIGS. 2a, 2b). This disc is manufactured as a turned part.
  • the edge surfaces (2) of the disc (1) are beveled on one or both sides ( Figure 1c).
  • the top and / or the underside of the disk is provided with circumferential, preferably circular-centered, zigzag-shaped tapered baffles (3, 4) inwards and / or outwards (FIG. 1b).
  • the grinding disk is preferably equipped with these baffles on at least half of its outer surface.
  • FIG. 1a due to the eccentric arrangement of the grinding disks, the grinding media hit the impact surfaces at different angles, as a result of which extremely good axial and radial conveyance of the grinding stock is achieved.
  • FIG. 1b shows a particularly preferred embodiment of the grinding disc according to the invention, in which these active surfaces are arranged on both sides, that is to say on the top and bottom of the grinding disc.
  • Steel, ceramic, low-pressure polyethylene or polyoxymethylene or others are used as the material for the grinding disc appropriate materials suitable. Since, as described above, the grinding disk is a turned part, in contrast to the prior art mentioned above, this requires a much simpler production.
  • FIGS. 2a and 2b The arrangement of the grinding disks in relation to the stirrer shaft (6) is shown in FIGS. 2a and 2b.
  • four disks (1, 1 ', 1 ⁇ , 1 axial) are axially seen helically offset from each other by 90 °, then follows as indicated in Figure 2b, the next series of 4 grinding disks.
  • Each grinding disc covers the entire cross-section of the grinding trough with each revolution. This effect is now greatly enhanced by the staggered arrangement of the grinding disks.
  • the grinding media are moved in the same direction, but at different speeds, which creates additional friction between the grinding media, which contributes to increasing the grinding work.
  • the grinding media are from the prior art known grinding balls, for example steel, glass, aluminum oxide or ceramic balls can be used, the size of the grinding balls can be selected within wide limits, for example from 0.2 to 5 mm.
  • the vertical distance between the individual grinding disks can be between 20 and 100 mm with a diameter of the grinding trough of 200 - 500 mm.
  • a ball filling degree for example 0.8 mm ceramic balls, of up to 94% can be achieved, while ball filling degrees of up to about 80% are generally known from the prior art.
  • agitator mills according to the invention have proven themselves particularly well in the very fine grinding of magnetic dispersions consisting of polymeric binder dissolved in an organic solvent and magnetic fine-particle pigments dispersed therein with a high viscosity of the millbase. It has been shown that the number of agitator mills connected in series could be reduced by about 1/3 for the fine grinding of such dispersions.
  • the stirring elements are arranged in a vertical agitator ball mill in such a way that the grinding disks arranged at the lower shaft end consist of steel, while the grinding disks arranged in the middle and at the top preferably consist of plastic.
  • the temperature profile in the grinding trough is taken into account, since, as is known to any person skilled in the art, the temperature due to the ball pressure in the lower part of the trough is significantly higher than in the upper part of the trough.

Landscapes

  • Engineering & Computer Science (AREA)
  • Food Science & Technology (AREA)
  • Chemical & Material Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Crushing And Grinding (AREA)
  • Mixers Of The Rotary Stirring Type (AREA)

Claims (4)

  1. Broyeur agitateur pour le broyage ultra-fin d'une dispersion de matière à broyer constituée de solides ou de mélanges de solides, constitué d'un récipient cylindrique destiné à recevoir la matière à broyer et des corps broyeurs et dans lequel est prévu un arbre tournant d'agitation (6) auquel sont fixés plusieurs disques broyeurs circulaires (1) jouant le rôle d'éléments agitateurs, au moins une partie de ces disques (1) étant fixés directement à l'arbre d'agitation (6) excentriquement et, vus dans la direction axiale, décalés les uns des autres, et les surfaces de bord (2) des disques broyeurs (1) étant biseautées, caractérisé par le fait que les disques broyeurs (1) sont pourvus de nervures concentriques sur leur face supérieure et/ou leur face inférieure, que la section transversale des disques broyeurs (1) est en forme de zigzag (3, 4) et que les surfaces de bord (2) des disques broyeurs (1) sont biseautées vers le haut et vers le bas uniformément tout autour.
  2. Broyeur agitateur selon la revendication 1, caractérisé par le fait que dans le cas où il est vertical, les disques broyeurs (1) situés à l'extrémité inférieure de l'arbre (6) sont en acier et les disques broyeurs (1) situés au milieu ou à l'extrémité supérieure de l'arbre (6) sont en matière plastique.
  3. Broyeur agitateur selon la revendication 1, caractérisé par le fait que dans le cas où il est vertical, les disques broyeurs (1) situés à l'extrémité inférieure de l'arbre sont placés excentriquement et présentent des surfaces de percussion (2, 3) seulement sur leur face supérieure, que les disques broyeurs (1) placés excentriquement à l'extrémité supérieure de l'arbre présentent des surfaces de percussion (2, 4) sur leur face inférieure et que dans la zone du milieu de l'arbre d'agitation (6) sont placés au milieu des disques perforés cylindriques classiques.
  4. Procédé de broyage ultra-fin d'une dispersion magnétique constituée de pigments magnétiques finement dispersés dans un liant polymère et d'autres adjuvants, caractérisé par le fait que la dispersion passe une ou plusieurs fois dans au moins un broyeur agitateur selon les revendications 1 à 3.
EP90113421A 1989-07-26 1990-07-13 Broyeur agitateur pour le microbroyage Expired - Lifetime EP0410229B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE3924678 1989-07-26
DE3924678A DE3924678A1 (de) 1989-07-26 1989-07-26 Ruehrwerksmuehle zur feinstmahlung

Publications (2)

Publication Number Publication Date
EP0410229A1 EP0410229A1 (fr) 1991-01-30
EP0410229B1 true EP0410229B1 (fr) 1994-03-02

Family

ID=6385848

Family Applications (1)

Application Number Title Priority Date Filing Date
EP90113421A Expired - Lifetime EP0410229B1 (fr) 1989-07-26 1990-07-13 Broyeur agitateur pour le microbroyage

Country Status (3)

Country Link
EP (1) EP0410229B1 (fr)
JP (1) JPH0360747A (fr)
DE (2) DE3924678A1 (fr)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP3725411B1 (fr) * 2019-04-18 2023-12-13 Twee "R" Recyclinggroep B.V. Appareil d'élimination de substances collées sur un matériau particulaire ou de broyage de matériau

Families Citing this family (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE4234759C2 (de) * 1992-10-15 2002-11-07 Emtec Magnetics Gmbh Rührwerkmühle zur Feinstmahlung
JP5326272B2 (ja) * 2007-12-13 2013-10-30 アイシン精機株式会社 気泡微細化装置及び気泡微細化装置を用いた気泡発生システム
DE102015101476A1 (de) * 2015-02-02 2016-08-04 Netzsch-Feinmahltechnik Gmbh Rührwerkskugelmühle und mahlscheibe für rührwerkskugelmühlen
JP7138986B1 (ja) * 2021-12-10 2022-09-20 淺田鉄工株式会社 分散機
JP7111399B1 (ja) * 2021-12-10 2022-08-02 淺田鉄工株式会社 分散機

Family Cites Families (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1207191B (de) * 1963-04-27 1965-12-16 Netzsch Maschinenfabrik Ruehrwerksmuehle zur Feinstvermahlung und Dispergierung
DE1211905B (de) * 1964-02-26 1966-03-03 Draiswerke Ges Mit Beschraenkt Ruehrwerksmuehle zum Herstellen von Feststoffdispersionen
DE1607533A1 (de) * 1968-01-02 1969-10-02 F B Lehmann Gmbh Maschinenfabr Ruehrwerksmuehle zum Feinstmahlen von Suspensionen wie Farben,Chemikalien und Kakao
DE2164286C3 (de) * 1971-12-23 1980-03-27 Gebrueder Netzsch, Maschinenfabrik Gmbh & Co, 8672 Selb Rührwerksmühle
DE2457609B2 (de) * 1974-12-05 1977-01-20 Gustav Spangenberg Maschinenfabrik Gmbh, 6800 Mannheim Ruehrwerksmuehle
ES222298Y (es) * 1976-07-13 1977-05-01 Oliver & Batlle, S. A. Disco perfeccionado para molienda.
US4513917A (en) * 1983-06-16 1985-04-30 Morehouse Industries, Inc. Sand mill rotor discs

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP3725411B1 (fr) * 2019-04-18 2023-12-13 Twee "R" Recyclinggroep B.V. Appareil d'élimination de substances collées sur un matériau particulaire ou de broyage de matériau

Also Published As

Publication number Publication date
JPH0360747A (ja) 1991-03-15
DE3924678A1 (de) 1991-02-07
EP0410229A1 (fr) 1991-01-30
DE59004741D1 (de) 1994-04-07

Similar Documents

Publication Publication Date Title
DE2445631C2 (de) Schnellaufende Rührwerksmühle
EP3311922B1 (fr) Broyeur à billes à agitateur
EP1829660B1 (fr) Machine de mélange et de malaxage pour masses en plastiques
AT509710B1 (de) Extruder
EP0410229B1 (fr) Broyeur agitateur pour le microbroyage
EP0504836B1 (fr) Broyeur agitateur
WO2019170661A1 (fr) Broyeur à agitateur avec ensemble de tiges asynchrone
AT253337B (de) Vorrichtung zum fortlaufenden Mahlen und Dispergieren von Feststoffen in Flüssigkeiten
EP0475015B1 (fr) Procédé et appareil pour le broyage continu et la dispersion de solides dans des liquides
DE2334789C2 (de) Misch- und Auflösemaschine
WO2011144196A1 (fr) Désintégrateur doté d'une chambre d'introduction et d'une chambre de refoulement
DE4234759C2 (de) Rührwerkmühle zur Feinstmahlung
DE1461012C3 (de) Vonchtung zum Zerfasern von Papierstoff
DE3444912C2 (de) Vorrichtung zum Behandeln pumpfähiger Materialien
DE1217754B (de) Muehle
DE102004053530B4 (de) Sichterrad für eine Vorrichtung zur Trennung staubförmiger, fasriger oder körniger Güter
DE102021133774A1 (de) Mahlwerkzeug für einen Refiner zum Aufschluss von lignozellulosehaltigem Aufgabegut sowie Refiner mit einem solchen Mahlwerkzeug
DE1141517B (de) Vorrichtung zum Zerkleinern, Mischen und Homogenisieren von Stoffen sowie zur Durchfuehrung mechano-chemischer Reaktionen
DE3245641A1 (de) Ruehrvorrichtung
WO2023099600A1 (fr) Outil de broyage pour un raffineur destiné à réduire en pâte une charge contenant de la lignocellulose, et raffineur comprenant un tel outil de broyage
EP1701794B1 (fr) Broyeur a disques
WO2002098547A2 (fr) Dispositif d'agitation permettant de traiter des milieux a ecoulement libre
DE1507653A1 (de) Ruehrwerksmuehle zum Mahlen und Dispergieren von Feststoffteilen in fluessigen Medien
DE1242078B (de) Ruehrwerksmuehle zum fortlaufenden Mahlen und Dispergieren von Stoffen in Fluessigkeiten
DE1507671C (de) Rührwerksmühle zum Feinstmahlen und Dispergieren

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

17P Request for examination filed

Effective date: 19900718

AK Designated contracting states

Kind code of ref document: A1

Designated state(s): DE FR IT NL

RAP1 Party data changed (applicant data changed or rights of an application transferred)

Owner name: BASF MAGNETICS GMBH

17Q First examination report despatched

Effective date: 19920224

GRAA (expected) grant

Free format text: ORIGINAL CODE: 0009210

AK Designated contracting states

Kind code of ref document: B1

Designated state(s): DE FR IT NL

ITF It: translation for a ep patent filed
REF Corresponds to:

Ref document number: 59004741

Country of ref document: DE

Date of ref document: 19940407

ET Fr: translation filed
PLBE No opposition filed within time limit

Free format text: ORIGINAL CODE: 0009261

STAA Information on the status of an ep patent application or granted ep patent

Free format text: STATUS: NO OPPOSITION FILED WITHIN TIME LIMIT

26N No opposition filed
PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: FR

Payment date: 19960614

Year of fee payment: 7

PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: NL

Payment date: 19960620

Year of fee payment: 7

NLS Nl: assignments of ep-patents

Owner name: BASF MAGNETICS GMBH;BASF MAGNETICS (HOLDING) GMBH

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: NL

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 19980201

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: FR

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 19980331

NLV4 Nl: lapsed or anulled due to non-payment of the annual fee

Effective date: 19980201

REG Reference to a national code

Ref country code: FR

Ref legal event code: TP

Ref country code: FR

Ref legal event code: CD

Ref country code: FR

Ref legal event code: CA

REG Reference to a national code

Ref country code: FR

Ref legal event code: TP

Free format text: CORRECTION

Ref country code: FR

Ref legal event code: CD

Free format text: CORRECTION

Ref country code: FR

Ref legal event code: CA

Free format text: CORRECTION

REG Reference to a national code

Ref country code: FR

Ref legal event code: ST

PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: DE

Payment date: 20020711

Year of fee payment: 13

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: DE

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20040203

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: IT

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20050713