EP0525423B1 - Dispositif et procédé de broyage de matériau avec une granulométrie variable - Google Patents

Dispositif et procédé de broyage de matériau avec une granulométrie variable Download PDF

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Publication number
EP0525423B1
EP0525423B1 EP92111150A EP92111150A EP0525423B1 EP 0525423 B1 EP0525423 B1 EP 0525423B1 EP 92111150 A EP92111150 A EP 92111150A EP 92111150 A EP92111150 A EP 92111150A EP 0525423 B1 EP0525423 B1 EP 0525423B1
Authority
EP
European Patent Office
Prior art keywords
grinding
air
separator
fresh
outlet
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
EP92111150A
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German (de)
English (en)
Other versions
EP0525423A1 (fr
Inventor
Ludger Lohnherr
Walter Dipl.-Ing. Holz
Werner Dipl.-Ing. Schöneich
Ludger Dipl.-Ing. Kimmeyer
Bernhard Zigan
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.)
ThyssenKrupp Industrial Solutions AG
Original Assignee
Krupp Polysius AG
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Publication date
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Publication of EP0525423A1 publication Critical patent/EP0525423A1/fr
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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
    • B02C23/00—Auxiliary methods or auxiliary devices or accessories specially adapted for crushing or disintegrating not provided for in preceding groups or not specially adapted to apparatus covered by a single preceding group
    • B02C23/18—Adding fluid, other than for crushing or disintegrating by fluid energy
    • B02C23/24—Passing gas through crushing or disintegrating zone
    • B02C23/32—Passing gas through crushing or disintegrating zone with return of oversize material to crushing or disintegrating 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
    • B02C15/00—Disintegrating by milling members in the form of rollers or balls co-operating with rings or discs
    • B02C2015/002—Disintegrating by milling members in the form of rollers or balls co-operating with rings or discs combined with a classifier

Definitions

  • the invention relates to a device (according to the preamble of claim 1) and a method (corresponding to the preamble of claim 8) for comminuting regrind of different grain sizes.
  • the invention is based on the object of improving a device of the type required in the preamble of claim 1 and a method according to the preamble of claim 8 in such a way that by relatively simple measures at least an additional increase in performance in comminuting the ground material can be reached.
  • the after-viewing device can be designed, for example, in the form of a material feed chute with an obliquely downwardly extending floor to which at least one viewing air inlet duct which is adjustable in terms of its flow cross section is connected.
  • An after-vision device designed in this way can be parallel, if necessary. H. be provided regardless of the feed device for the fresh regrind.
  • the feed device for fresh regrind to the shredding device is also designed in the form of a fresh material feed chute with a sloping bottom, to which at least one sight air inlet duct is connected, then it can also be particularly advantageous if the size outlet of the classifier is connected to this fresh material feed chute via a conveying device and this fresh material feed chute simultaneously forms the after-inspection device for at least the largest proportion of the coarse material returned from the classifier to the comminution device or for all returned coarse material.
  • the overall configuration of the device according to the invention to arrange at least the comminution device and the sifter as separate devices, that as sifter both a dynamic wind sifter (with rotating viewing elements) and a static wind sifter (without rotating viewing elements) and that, in addition, any design suitable for the comminution of regrind of different grain size, in particular for more or less brittle mineral material, can be provided as the comminution device.
  • the comminution device is designed in the form of a known vertical-axis roller mill with grinding tools (grinding rollers or grinding balls) rolling on a rotatable grinding table, and the separator is in a manner known per se directly above the roller mill arranged in a common device housing with this roller mill.
  • a mechanical conveying device preferably a screw conveyor, a simple material chute or the like.
  • the grit outlet of this air classifier with the indulgence device which can be formed in a particularly compact design of the overall device according to the above-described embodiment simultaneously by the fresh material feed chute.
  • the comminution device according to the invention is provided as a particularly preferred, extremely compact structural unit comprising a comminution device in the form of a vertical axis roller mill (roller mill) 1 known per se and an air classifier 2 arranged directly above it (in a form known per se) .
  • the roller mill 1 and the air classifier 2 arranged above it are - as is also known per se - housed in a common device housing 3.
  • the roller mill 1 which is only illustrated schematically, has in the usual way a grinding plate 5 which is rotatably driven about the vertical device axis 4 and has an upper, annular grinding path 5a on which stationary grinding rollers 6 roll, so that supplied grinding material 7 is crushed between grinding path 5a and grinding rollers 6 .
  • the wind sifter 2 is formed by a static wind sifter, which in the usual way has ring-shaped guide vanes 8, a coarse material hopper 9, an upper fine material outlet 10 and - at the lower end of the coarse material funnel 9 - Is provided with a lower Gresse outlet 11, which, if necessary, can also have a pendulum flap - not illustrated here.
  • the fresh ground material to be comminuted (arrow 12) is fed to the roller mill 1 via a fresh material feed chute 13 which is assigned to the roller mill 1 in such a way that the ground material arrives at the grinding path 5a.
  • This fresh material feed chute 13 has a sloping bottom 13a, to which two sifting air inlet channels 14 and 15 are connected in this example.
  • These sifting air inlet channels 14, 15 can be regulated or adjusted in their flow cross section, for example with the aid of sliders, so that the amount of sifting air and the effectiveness of the sifting air on the regrind 1 to be fed to the roller mill 1 can be regulated accordingly.
  • the grit outlet 11 is first connected to the fresh material feed chute 13 via a screw conveyor 16 (or else via another suitable mechanical conveyor device), said screw conveyor 16 - in the direction of regrind (arrow 12) considered - in the area in front of the sight air inlet (inlet channels 14 and 15) into the fresh material feed chute 13 is connected to the latter.
  • the fresh material feed chute 13 provided with the visible air inlet channels 14 and 15 thus simultaneously forms a kind of caution device for the fresh regrind (arrow 12) and rechecking device for the coarse material to be returned from the air classifier 2 to the roller mill 1 (arrow 17). .
  • a gas stream (arrows 18), preferably furnace gas, is sucked in by means of a fan (not illustrated in more detail) connected to the fine material outlet 10 of the device housing 3 through a nozzle ring 19 surrounding the grinding table 5 and together with the sufficiently crushed ground material discharged over the edge of the grinding plate 5 is directed to the air classifier 2 (arrows 20).
  • coarse material (arrows 17) precipitates and is returned to the grinding path 3 of the roller mill 1 via the coarse material funnel 9, the grit outlet 11, the screw conveyor 16 and the material feed chute 13 (together with the fresh regrind), while the fine material (Arrows 21) leaves the air classifier 2 through the nozzle-like fine material outlet 10.
  • both a caution of the freshly fed ground material (arrow 12) and an indulgence of the coarse material returned via the screw conveyor 16 ( Arrow 17) is carried out in such a way that all the fine material portions (arrows 23) which are aligned by the resulting cross flow can be fed directly to the air classifier 2 together with the ground material sufficiently comminuted in the roller mill 1.
  • a roller mill 1 ' is used as the comminution device vertical device axis 4 'and as a sifter a wind sifter 2' are provided directly above the roller mill 1 'in a common device housing 3', with fresh regrind (arrow 12 ') being fed to the roller mill 1' via a similar fresh material feed chute 13 ', the Floor 13a 'is in turn provided with controllable viewing air inlet channels 14' and 15 '.
  • the wind sifter 2 ' is a dynamic wind sifter which has viewing elements which can be driven to rotate about the vertical device axis 4' and have a rotating spreading disc 2'a .
  • this air classifier 2 ' in turn has a fine material outlet 10', a coarse material funnel 9 'and a grit outlet 11'.
  • the screw conveyor 16 'does not connect the spout 11' of the air classifier 2 'to the fresh material feed chute 13' which also acts as a viewing device, but rather the screw conveyor 16 'preferably only conveys an adjustable proportion of that from the meal - Outlet 11 'coarse material flowing out - according to arrow 25 - to a separate lifting elevator (as a mechanical lifting conveyor) 26, which this coarse material portion - possibly together with a portion of the comminuted material dropping down from the grinding table 5' - to a material inlet nozzle 27 for the air classifier 2 'promotes, which in this embodiment also forms the viewing device for the portion of coarse material to be checked (portion of portion).
  • the coarse material parts conveyed out of the device housing 3 'by the screw conveyor 16' thus pass from the lifting elevator good outlet 26a via the material inlet nozzle 27 to the spreading plate 2'a of the air classifier 2 ', so that the mechanically guided and overlapped coarse material part in this dynamic air classifier 2' Experienced indulgence, which in turn can relieve the roller mill of the already finely comminuted fine material (finished product). As is indicated in FIG.
  • a corresponding proportion of coarse material can be thrown outwards from the feed material thrown outwards from the spreading plate 2'a and can be returned directly to the grinding table 5'a along the inner wall of the device housing 3 ' , while other coarse material portions are guided downwards centrally via the coarse material funnel 9 'to the semolina outlet 11'.
  • the portion of coarse material which is not conveyed out of the device housing 3 'by the screw conveyor 16' can be fed directly to the grinding track 5'a, but possibly also to an indulgence in the fresh material feed chute 13 '.
  • the inlet spout 27 of the air classifier 2 ' opens out over the annular spreader plate 2'a
  • the inlet spout or a further inlet spout of the air classifier 2' in the indicated at 27a can open directly into the annular, upper wind classifier outer area 30, by which the ground material-air mixture (arrows 20 ') conveyed from the grinding table 5'a reaches this wind sifter 2'.
  • this second crop inlet connection 27a can be connected to the lifting elevator crop outlet 26a via a connecting line or partial line 31.
  • first material inlet nozzle 27 and the second material inlet nozzle 27a can expediently be offset from one another in the circumferential direction (for example by approximately 180 °).
  • the freeze outlet 11 ' can be followed by an adjustable quantitative distribution device, which on the one hand can be connected to the grinding plate 5' (if necessary via the Fresh material feed chute 13 ') and on the other hand - via the screw conveyor 16' and the lifting device 26 - is connected to the dynamic wind sifter 2 ', which also acts as a viewing device.
  • an adjustable quantity distribution device can be designed in any suitable manner. In the example according to FIG.
  • the screw conveyor 16 ' has a drive 28 which can be regulated in such a way that a more or less large overflow of material occurs at the inlet end 16'a of the screw conveyor 16' and this overflowing portion of coarse material then passes to the grinding table 5 'or if necessary, the fresh material feed chute 13 'is fed.

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  • Engineering & Computer Science (AREA)
  • Food Science & Technology (AREA)
  • Crushing And Grinding (AREA)
  • Combined Means For Separation Of Solids (AREA)
  • Disintegrating Or Milling (AREA)

Claims (16)

  1. Dispositif de fragmentation de matière de granulométries différentes, comprenant
    a) un dispositif de fragmentation (1, 1'),
    b) un dispositif d'amenée (13, 13') de matière fraîche (12, 12') associé au dispositif de fragmentation et qui comprend un dispositif (14, 15) d'introduction d'au moins un courant d'air qui sépare les fractions de matière fine de la matière fraîche,
    c) un séparateur (2, 2') de la matière fragmentée, qui comprend une sortie (10, 10') de matière fine ainsi qu'une sortie (11, 11') des granules qui est destinée à recycler la matière en gros grains dans le dispositif de fragmentation,
    caractérisé en ce que
    d) un dispositif de reséparation (13a, 2') disposé dans la région située entre la sortie (11, 11') des nodules du séparateur (2, 2') et le lieu de réintroduction de la matière en gros grains recyclée (17) dans le dispositif de fragmentation (1, 1') est destiné à séparer les fractions de matière fine de cette matière en gros grains.
  2. Dispositif selon la revendication 1, caractérisé en ce que le dispositif de reséparation est réalisé sensiblement sous la forme d'une goulotte (13) de déversement de matière fraîche à fond (13a) orienté obliquement vers le bas et auquel est raccordé au moins un canal (14, 15) d'entrée d'air de séparation, dont la section de circulation est réglable.
  3. Dispositif selon la revendication 2, le dispositif d'amenée de matière fraîche étant réalisé sous la forme d'une goulotte (13) de déversement de matière fraîche à fond (13a) orienté obliquement vers le bas et auquel est raccordé au moins un canal (14, 15) d'entrée d'air de séparation, caractérisé en ce que la sortie des nodules (11) du séparateur (2) est reliée par un dispositif de transport (16) à la goulotte (13) de déversement de matière fraîche et cette goulotte de déversement de matière fraîche forme également le dispositif de reséparation de la matière en gros grains recyclée du séparateur dans le dispositif de fragmentation (1), les fractions de matière fine extraites par séparation (23) pouvant être dirigées ensemble sur le séparateur.
  4. Dispositif selon la revendication 3, caractérisé en ce que le dispositif (16) de transport de la matière recyclée en gros grains - considéré dans le sens du transport de la matière à broyer (flèche 12) - est relié à la goulotte (13) de déversement de la matière fraîche dans la région située en amont de l'entrée d'air de séparation dans cette dernière.
  5. Dispositif selon la revendication 1, caractérisé en ce que le dispositif de reséparation est réalisé sous la forme d'un dispositif séparé de séparation à vent, dont la sortie de la matière en gros grains est reliée au dispositif de fragmentation et dont la sortie de matière fine est reliée à l'entrée du séparateur.
  6. Dispositif selon la revendication 2, caractérisé en ce que le dispositif de fragmentation est réalisé sous la forme d'un broyeur tournant (1, 1') à axe vertical, comprenant des outils de broyage (6) roulant sur un plateau rotatif de broyage (5, 5') et en ce que le séparateur constitué d'un séparateur à vent (2, 2') est disposé directement au-dessus du broyeur tournant, dans une enveloppe du dispositif (3, 3') qui est commune à ce broyeur tournant, un dispositif mécanique de transport (16, 16') étant prévu entre la sortie des granules (11, 11') de ce séparateur à vent et le dispositif de reséparation (13, 2').
  7. Dispositif selon la revendication 6, comprenant un transporteur surélévateur mécanique séparé (26) destiné à la matière fragmentée qui retombe du plateau de broyage (5'), caractérisé en ce que
    a) le séparateur à vent (2') forme également le dispositif de reséparation de la fraction de matière en gros grains devant subir la reséparation,
    b) le transporteur mécanique (16') disposé en aval de la sortie (11') des nodules est relié au transporteur surélévateur (26) et
    c) la sortie de la matière (26a) du transporteur surélévateur (26) communique avec une tubulure d'admission de la matière (27, 27a) dans le séparateur à vent (2').
  8. Dispositif selon la revendication 7, caractérisé en ce que la tubulure d'admission de matière (27) dans le séparateur à vent (2') débouche sur la sole distributrice (2'a) du séparateur à vent.
  9. Dispositif selon la revendication 7, caractérisé en ce que la tubulure d'entrée de matière (27a) dans le séparateur à vent (2') débouche directement dans la zone annulaire extérieure supérieure (30) du séparateur à vent par laquelle le mélange d'air et de matière (20') ramené du plateau de broyage (5'a) est dirigé dans le séparateur à vent.
  10. Dispositif selon la revendication 6, caractérisé en ce qu'un dispositif réglable de répartition quantitative (16'), qui est disposé en aval de la sortie des nodules (11') du séparateur à vent (2'), communique d'une part avec le plateau de broyage (5') du broyeur tournant (11') et d'autre part avec le dispositif de reséparation (2').
  11. Dispositif selon la revendication 10, caractérisé en ce que le dispositif mécanique de transport (16') monté en aval de la sortie des nodules (11') forme également le dispositif réglable de répartition quantitative.
  12. Dispositif selon la revendication 11, caractérisé en ce que le dispositif mécanique de transport est formé d'une vis sans fin de transport (16') à commande réglable (28).
  13. Procédé de fragmentation de matière à granulométries différentes, suivant lequel la matière fraîche à broyer est soumise, dans la zone d'arrivée située en amont d'un dispositif de fragmentation, à une séparation préalable par introduction d'un courant d'air de séparation, séparation préalable à la suite de laquelle les fractions de matière fine sont dirigées, avec la matière fragmentée dans le dispositif de fragmentation, dans un séparateur à vent dont la matière fine produite est soutirée et la matière en gros grains qui se présente sous forme de granules est recyclée dans le dispositif de fragmentation, caractérisé en ce qu'au moins une partie de la matière en gros grains devant être recyclée est soumise, avant d'être déversée dans le dispositif de fragmentation, à une reséparation pour l'extraction des fractions de matière fine.
  14. Procédé selon la revendication 13, caractérisé en ce que la matière en gros grains devant subir une reséparation est dirigée sur la matière fraîche et cette matière en gros grains est soumise avec la matière fraîche au courant d'air de séparation avant d'être dirigée dans le dispositif de fragmentation.
  15. Procédé selon la revendication 13, caractérisé en ce que la matière en gros grains devant subir une reséparation est renvoyée dans le séparateur à vent au moyen d'un dispositif de transport.
  16. Procédé selon la revendication 13, caractérisé en ce qu'un broyeur tournant à axe vertical et un séparateur à vent monté directement au-dessus de ce dernier sont utilisés pour la fragmentation et la séparation à vent de la matière fragmentée.
EP92111150A 1991-07-23 1992-07-01 Dispositif et procédé de broyage de matériau avec une granulométrie variable Expired - Lifetime EP0525423B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE4124416 1991-07-23
DE4124416A DE4124416A1 (de) 1991-07-23 1991-07-23 Einrichtung und verfahren zur zerkleinerung von mahlgut unterschiedlicher koernung

Publications (2)

Publication Number Publication Date
EP0525423A1 EP0525423A1 (fr) 1993-02-03
EP0525423B1 true EP0525423B1 (fr) 1994-12-28

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EP92111150A Expired - Lifetime EP0525423B1 (fr) 1991-07-23 1992-07-01 Dispositif et procédé de broyage de matériau avec une granulométrie variable

Country Status (6)

Country Link
US (1) US5381968A (fr)
EP (1) EP0525423B1 (fr)
DE (2) DE4124416A1 (fr)
DK (1) DK0525423T3 (fr)
ES (1) ES2067274T3 (fr)
ZA (1) ZA925238B (fr)

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KR101466887B1 (ko) * 2013-06-07 2014-12-04 한양대학교 산학협력단 인쇄회로기판의 금속 단체분리장치
CN104368528B (zh) * 2014-11-17 2017-01-11 王树波 一种高精度的控制粒度分布的分离器
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CN106466653B (zh) * 2015-08-21 2018-09-25 南京凯盛国际工程有限公司 新型立磨装置
CN106423414B (zh) * 2015-08-21 2018-10-23 南京凯盛国际工程有限公司 物料粉磨系统
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CN108339656A (zh) * 2018-02-23 2018-07-31 烟台龙源电力技术股份有限公司 一种燃煤锅炉制粉系统及其动态分离器
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Also Published As

Publication number Publication date
DK0525423T3 (da) 1995-04-24
EP0525423A1 (fr) 1993-02-03
ZA925238B (en) 1993-03-31
US5381968A (en) 1995-01-17
DE4124416A1 (de) 1993-01-28
ES2067274T3 (es) 1995-03-16
DE59201077D1 (de) 1995-02-09

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