EP3311922B1 - Broyeur à billes à agitateur - Google Patents

Broyeur à billes à agitateur Download PDF

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Publication number
EP3311922B1
EP3311922B1 EP16194369.1A EP16194369A EP3311922B1 EP 3311922 B1 EP3311922 B1 EP 3311922B1 EP 16194369 A EP16194369 A EP 16194369A EP 3311922 B1 EP3311922 B1 EP 3311922B1
Authority
EP
European Patent Office
Prior art keywords
grinding
agitating
ball mill
agitator ball
discs
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.)
Active
Application number
EP16194369.1A
Other languages
German (de)
English (en)
Other versions
EP3311922A1 (fr
Inventor
Benedikt SIMONS
Lionel Gross
Norbert 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.)
Willy A Bachofen AG
Original Assignee
Willy A Bachofen 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 Willy A Bachofen AG filed Critical Willy A Bachofen AG
Priority to EP16194369.1A priority Critical patent/EP3311922B1/fr
Priority to DK16194369.1T priority patent/DK3311922T3/en
Priority to ES16194369T priority patent/ES2713001T3/es
Priority to PL16194369T priority patent/PL3311922T3/pl
Priority to MYPI2017703643A priority patent/MY188730A/en
Priority to CN201710945790.4A priority patent/CN107952529B/zh
Priority to US15/783,431 priority patent/US10792665B2/en
Priority to KR1020170133970A priority patent/KR102501892B1/ko
Priority to JP2017201897A priority patent/JP2018108573A/ja
Publication of EP3311922A1 publication Critical patent/EP3311922A1/fr
Priority to HK18107541.9A priority patent/HK1248173A1/zh
Application granted granted Critical
Publication of EP3311922B1 publication Critical patent/EP3311922B1/fr
Active legal-status Critical Current
Anticipated expiration legal-status Critical

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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
    • B02C17/002—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 with rotary cutting or beating elements
    • 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
    • B02C17/163—Stirring means
    • 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
    • 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
    • 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
    • B02C17/183—Feeding or discharging devices
    • 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
    • B02C17/183—Feeding or discharging devices
    • B02C17/1835—Discharging devices combined with sorting or separating of material
    • B02C17/184—Discharging devices combined with sorting or separating of material with separator arranged in discharge path of crushing zone
    • 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
    • B02C17/20—Disintegrating members
    • 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
    • B02C2017/165—Mills in which a fixed container houses stirring means tumbling the charge with stirring means comprising more than one agitator

Definitions

  • the invention relates to a stirred ball mill according to the preamble of patent claim 1.
  • Such agitator ball mill is from the EP 2 178 642 A1 known.
  • flowable millbase a millbase suspension
  • the grinding suspension consists of a carrier liquid and solids distributed therein, wherein the initial particle size in the range of a few microns up to several hundred microns.
  • the final fineness of the grinding is in the micrometer, submicron and in special cases in the nanometer range.
  • the grinding media are carried along by the walls bounding the opening in different directions, so that a completely disordered passage of grinding media and grinding stock takes place between adjacent grinding cells, whereby the Zopfströmonne are disturbed very strongly, so that there is a very non-uniform MahlSystemver republic throughout the grinding chamber and in each individual grinding cell. Furthermore, there is a broad residence time distribution for the ground material during the passage of the grinding chamber.
  • Mahlgut passage openings are formed for the passage of ground material and grinding media in the separator in the last, part of a separator forming stirring disc.
  • recesses are formed congruently with the mentioned large openings in the other upstream stirring disks, are entrained by the grinding bodies and accelerated centrifugally outwards. Because of the depressions, that is to say for reasons of space, the grinding medium through-passage openings are arranged relatively close to the agitator shaft.
  • the MahlSystem Struct is offset by the Rhackeinbauten within the active grinding chamber in relative motion.
  • the grinding suspension to be treated is conveyed by means of a suitable pump through the sealed under pressure up to about 5 bar, in special cases up to 10 bar, operable grinding chamber.
  • the solid particles present in the millbase suspension that is to say the millbase, are stressed between the relatively moving bodies and, depending on the morphology, are comminuted or dispersed.
  • the invention has for its object to ensure in a generic agitator ball mill with particularly simple means a uniform grinding media distribution along the grinding chamber up to the highest Mahlgut-throughputs in a wide operating range and at the same time to achieve a particularly uniform grinding action.
  • stirred ball mill can be operated with extraordinarily high throughputs if the otherwise break-through-free, ie closed, stirring discs have only small grinding material passage openings in the immediate vicinity of the agitator shaft.
  • the term "in the immediate vicinity” means that both cases in which the grinding chamber inner boundary coincides with the radially inner boundary of the grinding material through-openings, thus the Mahlgut-passage openings to the Mahlraum-inner boundary are adjacent, as well as those cases in which the radially inner boundary of the grinding material passage openings a - albeit small - distance from the grinding chamber inner boundary, are detected.
  • the distance of the radially inner boundary of Regrind passage opening have a distance from the grinding chamber inner boundary, which is in a range up to a tenth ( ⁇ 0.1) of the radial extent of the respective stirring disc from the grinding chamber inner boundary to the radially outer edge of the respective stirring disc.
  • a small distance of the radially inner boundary of the grinding stock passage opening from the grinding chamber inner boundary can be advantageous or even necessary, for example, for manufacturing reasons.
  • In a very wide throughput range results in an absolutely constant power consumption, which is an indication of a uniform grinding media distribution, which is not adversely affected by an increase in throughput.
  • the dependent claims 5 to 8 specify particularly advantageous developments of the inventive agitator ball mill, can be effected by the targeted different accelerations of the grinding media over the radial extent of the stirring discs, whereby a targeted transport of the grinding media is achieved to the outside.
  • FIG. 1 a horizontal agitator ball mill is shown. This has in the usual way a stand 1, which is supported on the bottom 2.
  • a stand 1 which is supported on the bottom 2.
  • an optionally variable speed drive motor 3 is housed, which is provided with a V-belt pulley 4, from which via V-belt 5 and another V-belt pulley 6, a drive shaft 7 of the agitator ball mill is rotatably driven.
  • the drive shaft 7 is rotatably mounted in an upper portion 8 of the stator 1 by means of a plurality of bearings 9.
  • a substantially cylindrical grinding container 10 is releasably secured at the upper portion 8 of the stator 1.
  • the cylindrical grinding container 10 has an inner wall 11 and is closed at an end facing the upper section 8 by means of a first cover 12 and at the opposite end by means of a second cover 13. It encloses a grinding chamber 14.
  • the inner wall 11 thus forms the Mahlraum-outer boundary.
  • agitator shaft 16 Concentric with the common center-longitudinal axis 15 of the grinding container 10 and the drive shaft 7 is a rotationally fixed to the drive shaft 7 connected agitator shaft 16 is arranged in the grinding chamber 14.
  • the grinding chamber 14 is sealed by means of seals 17 between the cover 12 and the drive shaft 7.
  • the agitator shaft 16 is cantilevered, so no longer stored in the region of the second lid 13. It is provided over its entire length in the grinding chamber 14 with stirring tools, which are circular stirring discs 18.
  • the stirring discs 18 are mounted on the agitator shaft 16 and there in the usual manner, for example by a keyway-groove connection, not shown rotatably held on the agitator shaft 16 and axially held by spacer sleeves 19 at a distance from each other.
  • the agitator shaft 16 with the spacer sleeves 19 and the stirring discs 18 form an agitator 20.
  • the spacer sleeves 19 define the substantially annular cylindrical grinding chamber 14 on its inner side, thus forming a Mahlraum-inner boundary.
  • a grinding material feed 21 opens into the grinding chamber 14. From the end of the grinding container 10 opposite the grinding material feed 21, a grinding material discharge 22 issues from the second cover 13.
  • a cylindrical cage 23 is formed on the outer circumference of the second cover 13 adjacent last stirring disc 18. He has distributed over its circumference openings 24. In the delimited by the last stirring disc 18 and the cage 23 separating chamber 25, a screen body 26 is arranged, which is attached to the second cover 13 and connected to the grinding stock removal 22. These parts form one of the EP 2 178 642 A1 known regrind grinding media separator 27.
  • the stirring discs 18 (or 18a, 18b, see Fig. 4 - Fig. 7 ) have one or more regrind passage openings 28, which are formed circular in the embodiment. On the - with respect to the central longitudinal axis 15 - inside the Mahlgut-passage openings 28 adjoin the distance sleeves 19, so the Mahlraum-inner boundary on.
  • the regrind passage openings 28 are arranged at regular angular intervals from each other, for example, six openings 28, as in FIG. 2 shown. Apart from the grinding material passage openings 28, the stirring discs 18 (or 18a, 18b) have no openings, so they are completely closed.
  • the grinding stock through-openings 28 each have a radially outer boundary, which has a distance R28, starting from the spacer sleeve 19 (grinding chamber inner boundary) in the radial direction of the stirring disk 18.
  • R28 the distance between the spacer sleeve 19
  • R18 the grinding chamber inner boundary
  • R18 the radial extent of the spacer sleeve 19
  • up to the radial outer edge 30 (radially outer edge) of the stirring discs 18 is: 0.05 ⁇ R18 ⁇ R28 ⁇ 0.25 ⁇ R18, and thereby preferably R28 ⁇ 0.20 ⁇ R18 and more preferably R28 ⁇ 0.15 ⁇ R18.
  • Adjacent stirring discs 18 each have a same axial distance a from each other. Further define adjacent to each other stirring discs 18 a separation angle ⁇ , each by a line 29 between the radial outer edge 30 of a stirring disc 18 and the foot of an adjacent stirring disc 18 on the agitator shaft 16, d. H. is formed on the respective spacer sleeve 19 and by a line 31 parallel to the central longitudinal axis 15. The following applies: 30 ° ⁇ ⁇ 60 °.
  • the gap width b of the gap 32 between the radial outer edge 30 and the wall 11 is at most 20% of the free radius R14 of the grinding chamber 14.
  • the grinding chamber 14 is substantially filled with grinding media 33, preferably with grinding media 33 of relatively high density materials, for example ZrO 2 (zirconia) high performance ceramics having a solids density of 6.0 g / cm 3 .
  • the Mahl Eisengrad (bulk volume of the grinding media relative to the volume of the grinding chamber) is in the range of 50% to 90%, in particular in the range of 80% to 90%.
  • the high solids density of the grinding bodies 33 relative to the density of the grinding suspension is important for the desired effects, namely to promote the grinding media 33 in the area of the surfaces of the respective stirring disks 18 in the grinding element-compressed zone to the outside.
  • each in FIG. 3 form plait flows 35 shown.
  • the grinding media 33 and the grinding stock to be treated respectively flow in the area of a stirring disk 18 due to the tangential acceleration caused by the stirring disks 18 and then inwardly in the axially central region of the grinding cell 34 Agitator shaft 16 out.
  • the grinding medium concentration is the lowest.
  • material to be ground flows from a grinding cell 34 through the grinding material passage openings 28 into an adjacent grinding cell 34.
  • the grinding stock flow through the grinding medium passage openings 28 is indicated by flow direction arrows 36 in FIG FIG. 3 indicated.
  • the total flow direction 37 of the agitator ball mill is in the FIGS. 1 and 3 from left to right, ie from the grinding stock feed 21 to the grinding stock removal 22.
  • the regrind passage openings 28 are not adjacent to the spacer sleeve 19, but the radially inner boundary of the respective regrind passage opening 28 has a small distance A in the radial direction of the spacer sleeve 19, which in the area may be up to a tenth ( ⁇ 0.1) of the radial extent R18 of the stirring disk from the distance sleeve 19 (Mahlraum-inner boundary) to the outer edge 30 (radially outer edge) of the stirring disk 18, so that in general 0 ⁇ A ⁇ 0.1 ⁇ R18 (in the case of the distance 0, the radially inner boundary of the respective regrind passage opening 28 adjoins the spacer sleeve 19, see FIG Fig. 2 ).
  • the acceleration of the grinding media 33 by the stirring disks 18 can be achieved by groove-like channels formed in the stirring disks 18 (or 18a, 18b) 38a, 38b (see Fig. 4 - Fig. 7 ), which each begin at a grinding material passage opening 28 and are directed towards the radial outer edge 30 of the respective stirring disk 18 (or 18a, 18b), but without the radial outer edge 30 of the respective stirring disk 18 (FIG. or 18a, 18b) to break.
  • a stirring disk outer ring 39 remains, which in the example shown has the thickness c of the stirring disk 18 (or 18a, 18b).
  • the respective stirring discs 18 (or 18a, 18b) are not broken parallel to the central longitudinal axis 15.
  • the respective stirring disk 18 (or 18a, 18b) is thus completely closed and has only the described grinding material passage openings 28.
  • the channels 38a extend radially outward relative to the central longitudinal axis 15 and have a width d which corresponds to the diameter of the grinding material passage openings 28.
  • the respective channels 38a are formed on both sides of the corresponding stirring disc 18a, so that between them - like FIG. 5 is removable - a thin wall portion 40a remains.
  • the grinding media 33 are tangentially taken in the respective channel 38a of the trailing in the direction of rotation 41 channel wall 42a and thereby accelerated centrifugally.
  • the tangential velocities and thus the resulting radially directed centrifugal accelerations increase radially outwards, as indicated by the radially outwardly increasing length of the speed arrows 43a.
  • the stirring discs 18b after the FIGS. 6 and 7 also have a width d (corresponding to the diameter of the grinding material passage openings 28), through a wall portion 40b from each other channels 38b, starting from the respective regrind passage opening 28 a radially to the central longitudinal axis 15 extending inner rectilinear channel section 44, to which radially outwardly bent against the direction of rotation 41 of the stirring discs 18b outer Channel section 45 connects, which also ends in front of the outer ring 39. Due to the mentioned embodiment, the grinding media 33 receive accelerations in different directions.
  • the entrainment of the grinding media 33 through the channel wall 42 b is tangential, while in the radially outer channel portion 45 due to the course of the channel wall 42 b is directed radially tangentially.
  • the different lengths of speed arrows 43b symbolize the different directions and amounts of the forces exerted on the grinding media 33 accelerations.
  • the channel 38b runs over its full width in the outer ring 39.
  • the trailing channel wall 42b thus effects exclusively outward accelerations on the grinding bodies 33 up to its outermost end.
  • the grinding bodies 33 which are in engagement with the channel 38b are thus pressed outwards, as it were, in a form-fitting manner.
  • FIG. 8 shows a further usable in all the aforementioned embodiments development in which in relation to the total flow direction 37 of the agitator ball mill each between a spacer sleeve 19c and the grinding material passage opening 28 of the upstream stirring disc 18, a deflection channel 46 is formed which deflects the millbase flow radially from a grinding cell 34 located upstream in relation to the total flow-through direction 37 into the downstream grinding cell 34 and introduces it into the outwardly directed braid flow 35 in the downstream grinding cell 34.
  • the spacer sleeve 19c is designed such that the grinding material passage opening arranged downstream in the overall flow-through direction 37 28 is freely accessible from the millbase flow in the grinding cell 34.

Claims (13)

  1. Broyeur à billes à agitateur
    - comprenant un récipient de broyage (10) disposé de façon horizontale,
    -- qui renferme un espace de broyage (14) cylindrique circulaire, délimité par une paroi de récipient de broyage (11) et une délimitation interne d'espace de broyage (19),
    -- dans lequel débouche, à une extrémité, une alimentation de produit à broyer (21), et
    -- dont part, à l'autre extrémité, une évacuation de produit broyé (22) dotée d'un dispositif (27) de séparation de produit broyé-corps de broyage, installé en amont,
    - comprenant un agitateur (20) qui est disposé dans l'espace de broyage (14) et qui
    -- présente un arbre d'agitateur (16) pouvant être entraîné en rotation et doté d'un axe longitudinal médian (15), et
    -- des disques agitateurs (18) montés de façon solidaire en rotation sur l'arbre d'agitateur (16) et disposés à distance axiale (a) les uns des autres,
    -- deux disques agitateurs (18) mutuellement voisins délimitant chaque fois une cellule de broyage (34),
    -- les disques agitateurs (18) présentant des ouvertures reliant des cellules de broyage (32) voisines, et
    -- les disques agitateurs (18) présentant - par rapport à l'axe longitudinal médian (15) - une dimension radiale R18 depuis la délimitation interne d'espace de broyage jusqu'au bord radialement extérieur (30) des disques agitateurs (18),
    caractérisé en ce que
    les ouvertures sont réalisées comme ouvertures de passage de produit à broyer (28) et sont disposées uniquement à proximité immédiate de la délimitation interne d'espace de broyage (19), les ouvertures de passage de produit à broyer (28) ayant respectivement une limite radiale extérieure qui présente une distance R28 en partant de la délimitation interne d'espace de broyage, dans la direction radiale du disque agitateur (18),
    le rapport entre la distance R28 de la limite radiale extérieure des ouvertures de passage de produit à broyer (28) et la dimension radiale R18 des disques agitateurs (18) étant défini par : 0.05 · R18 ≤ R28 ≤ 0.25 · R18, et
    en ce que les disques agitateurs (18) sont par ailleurs réalisés sous une forme pleine.
  2. Broyeur à billes à agitateur selon la revendication 1, caractérisé en ce que le rapport entre la distance R28 de la limite radiale extérieure des ouvertures de passage de produit à broyer (28) et la dimension radiale R18 des disques agitateurs (18) est défini en outre par : R28 ≤ 0.20 · R18.
  3. Broyeur à billes à agitateur selon la revendication 1, caractérisé en ce que le rapport entre la distance R28 de la limite radiale extérieure des ouvertures de passage de produit à broyer (28) et la dimension radiale R18 des disques agitateurs (18) est défini en outre par : R28 ≤ 0.15 · R18.
  4. Broyeur à billes à agitateur selon une des revendications 1 à 3, caractérisé en ce que les ouvertures de passage de produit à broyer (28) sont disposées à des distances angulaires régulières les unes des autres.
  5. Broyeur à billes à agitateur selon une des revendications 1 à 4, caractérisé en ce que sur les deux faces des disques agitateurs (18a, 18b) - en partant des ouvertures de passage de produit à broyer (28) -des canaux (38a, 38b) en forme de rainures ne traversant pas le disque agitateur (18a, 18b) respectif sont ménagés en direction de l'axe longitudinal médian (15) et sont dirigés vers le bord radial extérieur (30) du disque agitateur (18a, 18b) et sont fermés en direction du bord radial extérieur (30) du disque agitateur (18a, 18b).
  6. Broyeur à billes à agitateur selon la revendication 5, caractérisé en ce que les canaux (38a, 38b) réalisés sur des faces différentes des deux faces des disques agitateurs (18a, 18b), en partant d'une ouverture de passage de produit à broyer (28), sont disposés respectivement par paires de manière à concorder.
  7. Broyeur à billes à agitateur selon une des revendications 5 ou 6, caractérisé en ce que les canaux (38a) ménagés sur les deux faces des disques agitateurs (18a) sont réalisés sous une forme rectiligne et en s'étendant radialement par rapport à l'axe longitudinal médian (15).
  8. Broyeur à billes à agitateur selon une des revendications 5 ou 6, caractérisé en ce que les canaux (38b) ménagés sur les deux faces des disques agitateurs (18b) présentent un segment de canal (45) extérieur qui est incurvé dans le sens opposé au sens de rotation (38) du disque agitateur (18b).
  9. Broyeur à billes à agitateur selon une des revendications 5 à 8, caractérisé en ce que les disques agitateurs (18a, 18b) présentent une bague extérieure de disque agitateur (39) disposée radialement à l'extérieur.
  10. Broyeur à billes à agitateur selon une des revendications 1 à 9, caractérisé en ce que dans une cellule de broyage (34), derrière une ouverture de passage de produit à broyer (28) qui relie une cellule de broyage (34), disposée en amont par rapport à un sens d'écoulement de traversée global (37) du broyeur à billes à agitateur, à une cellule de broyage (34) disposée en aval, est réalisé un canal de déviation (46) qui débouche radialement vers l'extérieur dans la cellule de broyage (34).
  11. Broyeur à billes à agitateur selon une des revendications 1 à 10, caractérisé en ce qu'il est prévu, entre le bord radialement extérieur (30) des disques agitateurs (18) et la paroi (11) du récipient de broyage (10), respectivement un espace (32) dont la largeur d'espace radiale b correspond au maximum à 20 % d'un rayon libre R14 de l'espace de broyage (14) entre la délimitation interne d'espace de broyage (19) et la paroi de réservoir de broyage (11).
  12. Broyeur à billes à agitateur selon une des revendications 1 à 11, caractérisé en ce que l'espace de broyage (14) est rempli de corps broyants (33) dont le volume apparent correspond à 50 % à 90 % du volume de l'espace de broyage (14), en particulier à 80% à 90 % du volume de l'espace de broyage (14).
  13. Broyeur à billes à agitateur selon une des revendications 1 à 12, caractérisé en ce que les corps broyants (33) présentent une densité vraie qui est supérieure d'au moins 2 g/cm3 à la densité de mélange du produit à broyer.
EP16194369.1A 2016-10-18 2016-10-18 Broyeur à billes à agitateur Active EP3311922B1 (fr)

Priority Applications (10)

Application Number Priority Date Filing Date Title
EP16194369.1A EP3311922B1 (fr) 2016-10-18 2016-10-18 Broyeur à billes à agitateur
DK16194369.1T DK3311922T3 (en) 2016-10-18 2016-10-18 Stirring Ball Mill
ES16194369T ES2713001T3 (es) 2016-10-18 2016-10-18 Molino agitador de bolas
PL16194369T PL3311922T3 (pl) 2016-10-18 2016-10-18 Młyn kulowy z mieszadłem
MYPI2017703643A MY188730A (en) 2016-10-18 2017-09-27 Agitator ball mill
CN201710945790.4A CN107952529B (zh) 2016-10-18 2017-10-12 搅拌器式球磨机
US15/783,431 US10792665B2 (en) 2016-10-18 2017-10-13 Agitator ball mill
KR1020170133970A KR102501892B1 (ko) 2016-10-18 2017-10-16 교반기 볼 밀
JP2017201897A JP2018108573A (ja) 2016-10-18 2017-10-18 撹拌ボールミル
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JP2018108573A (ja) 2018-07-12
US20180104699A1 (en) 2018-04-19
KR20180042806A (ko) 2018-04-26
EP3311922A1 (fr) 2018-04-25
MY188730A (en) 2021-12-26
KR102501892B1 (ko) 2023-02-20
DK3311922T3 (en) 2019-03-18
CN107952529B (zh) 2020-06-05
HK1248173A1 (zh) 2018-10-12
CN107952529A (zh) 2018-04-24
ES2713001T3 (es) 2019-05-17
PL3311922T3 (pl) 2019-05-31
US10792665B2 (en) 2020-10-06

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