EP0325770B1 - Procédé et installation de broyage - Google Patents

Procédé et installation de broyage Download PDF

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Publication number
EP0325770B1
EP0325770B1 EP88121321A EP88121321A EP0325770B1 EP 0325770 B1 EP0325770 B1 EP 0325770B1 EP 88121321 A EP88121321 A EP 88121321A EP 88121321 A EP88121321 A EP 88121321A EP 0325770 B1 EP0325770 B1 EP 0325770B1
Authority
EP
European Patent Office
Prior art keywords
grinding
ring
air stream
elevated
air
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
EP88121321A
Other languages
German (de)
English (en)
Other versions
EP0325770A3 (en
EP0325770A2 (fr
Inventor
Ludger Ing. Lohnherr (Grad.)
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
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 Krupp Polysius AG filed Critical Krupp Polysius AG
Publication of EP0325770A2 publication Critical patent/EP0325770A2/fr
Publication of EP0325770A3 publication Critical patent/EP0325770A3/de
Application granted granted Critical
Publication of EP0325770B1 publication Critical patent/EP0325770B1/fr
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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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 grinding process (according to the preamble of claim 1) and a grinding plant (according to the preamble of claim 5).
  • Ring mills are known in particular in the form of roller bowl mills, roller mills or ball ring mills.
  • the grinding tools designed as rollers, rollers or balls roll on an annular grinding plate, the grinding pressure being generated by spring force, hydraulic cylinders, by centrifugal force or by the weight of the grinding tools.
  • an air stream is fed through a nozzle ring which is arranged in a fixed manner on the outer circumference of the grinding plate and which detects and carries up the fine constituents of the comminuted ground material discharged over the edge of the grinding plate, while carrying the coarse constituents downward against the air flow through the nozzle ring fall and, for example, are re-fed to the mill via a mechanical conveyor.
  • the grinding material is also comminuted using the known design according to DE-A-3 443 808, but in this case not from a nozzle ring, but only from a circular gap or an opening for the air passage between the outer circumference of the grinding table and the mill housing is spoken.
  • the gas stream blown upward through the above-mentioned opening should have a speed sufficient to at least partially upward in a fine-grained powder to promote air classifiers arranged above the grinding table, while the remaining part of the relatively small-grained particles is to be blown back onto the grinding table, and in addition only the coarse-grained particles should fall down from the grinding table at the selected speed.
  • These coarse-grained particles falling down are first collected with the aid of a mechanical conveyor and conveyed to a mechanical vertical conveyor, which in turn feeds the coarse-grained particles - via a feed channel - directly to the grinding table.
  • the prerequisite in the preamble of claim 1 Art is set the air speed in the nozzle ring so high that essentially the entire, down to final fineness of material that is discharged over the edge of the grinding track, captured by the air flow and conveyed pneumatically to the classifier.
  • the coarse fraction of the ground material that falls downward through the nozzle ring against the air flow is conveyed up by a mechanical conveying device and directly fed back into the grinding path.
  • a disadvantage of this known method is the high pressure loss associated with the pneumatic conveying of the fine material, which requires the installation of a considerable fan output and entails considerable energy consumption during operation.
  • the invention is therefore based on the object of designing a grinding method in accordance with the preamble of claim 1 and a grinding system in accordance with the preamble of claim 5 in such a way that the pressure loss associated with the pneumatic conveying is reduced, so that the required fan output is reduced and the energy consumption is reduced .
  • the invention is based on the knowledge confirmed by extensive tests that a significant reduction in pressure loss and consequently a considerable reduction in the fan output to be installed and a considerable reduction in energy consumption can be achieved if the air speed in the nozzle ring is chosen to be so low that a part of the material, which has already been reduced to final fineness, falls downwards against the air flow through the nozzle ring and is conveyed up mechanically, whereby this is achieved by the mechanical conveyor highly conveyed goods are subjected to a screening and the resulting coarse fraction is returned to the grinding path of the ring mill.
  • the mechanically conveyed goods are advantageously sifted using the same air stream, through which part of the goods discharged over the edge of the grinding track is carried upwards.
  • the grinding system shown contains an annular mill 1 which contains a grinding table 3 rotating about a vertical axis 2 and which is driven from below by a drive 4. On the grinding path 3a of the grinding plate 3, grinding rollers 5 are supported, which rotate about horizontal axes 5a and are pressed onto the grinding path 3a by a holder (not shown in more detail).
  • the grinding table 3 of the ring mill 1 is surrounded by a nozzle ring 6, which is used to supply an air flow, which is supplied via a connection 7 and through which Arrows 8 is illustrated.
  • the width of the nozzle ring 6 and thus the air speed in the nozzle ring 6 can be adjusted by adjusting the nozzle ring 6.
  • a dynamic classifier 9 is arranged above the ring mill 1 and has a fixed classifier Guide vane ring 10 contains.
  • a rotor 11 is arranged within this guide vane ring 10 and can be rotated about a vertical axis and is driven by a drive motor (not shown) via a shaft 12.
  • the shaft 12 is supported at the lower end in a bearing 13 which is adjustable in the radial direction via struts 14.
  • the rotor 11 contains on its periphery a large number of adjustable deflector elements 15, which are preferably formed by wings or rods arranged parallel to the axis.
  • the rotor 11 is open at the top and bottom.
  • annular spreading plate 16 At the top of the rotor 11 there is an annular spreading plate 16 which can be rotated together with the rotor 11. In the housing cover 17 there are two connections 18a, 18b for feeding material to the spreading plate 16.
  • the classifier 9 also contains a coarse material hopper 19 below the rotor 11, the lower hopper opening of which opens out above the grinding path 3a of the grinding plate 3. Goods are fed to the ring mill 1 via a goods feed opening 20.
  • the grinding system also contains a mechanical conveyor device 21 and a gutter 22.
  • the operation of the grinding plant according to the grinding process according to the invention is as follows:
  • the material fed to the grinding table 3 of the ring mill 1 is crushed by the action of the grinding rollers 5 and discharged over the outer edge of the grinding track 3a.
  • the air speed in the nozzle ring 6 is now chosen to be so low that not only the coarse material, but also part of the material, which has already been comminuted to its final fineness, fails downward against the air flow (arrows 23).
  • the rest of the fine material (arrows 24) is caught by the air flow (arrows 8) and pneumatically conveyed up to the classifier 9.
  • the material which has fallen downward in the nozzle ring 6 against the air flow (arrows 23) is conveyed up by the mechanical conveying device 21 and fed to the spreading plate 16 via the connections 18a, 18b (arrows 23a).
  • the mechanically conveyed goods can also be fed directly to the grinding table 3 via the switch 22 (arrow 23b).
  • the part of the mechanically conveyed material which is fed to the spreading plate 16 via the connections 18a, 18b is carried radially outward by the spreading plate 16, deflected downward via an annular deflecting member arranged on the housing ceiling 17 and then enters the room in front of the guide vane ring 10.
  • the material conveyed up by the mechanical conveying device 21 and scattered in via the spreading plate 16 enters the air flow (arrow 8) which contains the pneumatically entrained material (arrow 24).
  • the technical progress achieved by the invention is illustrated by the following experimental example:
  • the air speed in the nozzle ring was reduced from 55 m / s to 40 m / s on a grinding plant.
  • about 250 t / h of material were conveyed pneumatically upwards, this quantity dropped to 50 t / h, while the quantity to be mechanically increased accordingly.
  • the entire mechanically conveyed material was immediately returned to the grinding path, so with the air speed reduced to 40 m / s, the entire mechanically conveyed material was fed into the spreading disc.
  • the measures according to the invention resulted in an energy saving of approximately 20% for the entire system (mill and fan).

Landscapes

  • Engineering & Computer Science (AREA)
  • Food Science & Technology (AREA)
  • Crushing And Grinding (AREA)
  • Disintegrating Or Milling (AREA)

Claims (8)

  1. Procédé de broyage suivant lequel
    a) une partie du produit fragmenté dans un broyeur annulaire (1) et déchargé par dessus le bord de la voie de broyage (3a) de ce broyeur annulaire est entraînée vers le haut par un courant d'air arrivant par le bas, par un ajutage annulaire (6) entourant la voie de broyage,
    b) tandis que le reste du produit déchargé par dessus le bord de la voie de broyage retombe contre le courant d'air par l'ajutage annulaire et est convoyé vers le haut par un dispositif mécanique de transport (21),
    caractérisé par les particularités suivantes :
    c) la vitesse de l'air adoptée dans l'ajutage annulaire (6) est suffisamment basse pour qu'une partie du produit déjà fragmenté à la finesse finale retombe aussi contre le courant d'air par l'ajutage annulaire (6),
    d) le produit convoyé vers le haut par le dispositif mécanique de transport (21) est soumis à une séparation, la fraction grossière résultant de cette dernière étant renvoyée sur la voie de broyage (3a) du broyeur annulaire (1).
  2. Procédé de broyage selon la revendication 1, caractérisé en ce que la séparation du produit transporté mécaniquement vers le haut est effectuée à l'aide du même courant d'air que celui qui entraîne vers le haut une partie du produit déchargé par dessus le bord de la voie de broyage (3a).
  3. Procédé de broyage selon les revendications 1 et 2, suivant lequel le produit entraîné vers le haut par le courant d'air est dirigé sur une zone de séparation de laquelle la fraction grossière provenant de la séparation est renvoyée sur la voie de broyage (3a) du broyeur annulaire (1), caractérisé en ce que la séparation du produit transporté mécaniquement vers le haut est également exécutée dans la zone dans laquelle a lieu la séparation du produit entraîné vers le haut par le courant d'air.
  4. Procédé de broyage selon la revendication 1, caractérisé en ce que le produit transporté mécaniquement vers le haut est renvoyé sélectivement directement sur la voie de broyage (3a) du broyeur annulaire (1).
  5. Installation de broyage comprenant
    a) un broyeur annulaire (1) dont la voie de broyage (3a) est entourée d'un ajutage annulaire (6) destiné à l'arrivée d'un courant d'air qui entraîne vers le haut le produit déchargé par dessus le bord de la voie de broyage,
    b) un séparateur (9) du courant d'air chargé de produit qui est disposé au-dessus de la voie de broyage (3a), le produit grossier provenant de ce séparateur étant renvoyé sur la voie de broyage,
    c) un dispositif mécanique de transport (21) destiné à convoyer vers le haut le produit retombant par l'ajutage annulaire (6),
    caractérisée par la particularité suivante :
    d) le séparateur (9) est équipé d'un dispositif de déversement de produit (16, 18a, 18b) qui introduit le produit convoye vers le haut par le dispositif mécanique de transport dans le courant d'air utilisé pour le transport pneumatique de produit vers le haut.
  6. Installation de broyage selon la revendication 5, caractérisé par les composants suivants du séparateur :
    a) une couronne fixe (10) d'ailettes directrices destinée à l'introduction du courant d'air chargé de produit transporté pneunmatiquement vers le haut,
    b) un rotor (11) disposé à l'intérieur de la couronne (10) d'ailettes directrice, rotatif autour d'un axe vertical et comportant à la circonférence de multiple éléments déflecteurs réglables (15),
    c) une sole distributrice annulaire (16) disposée sur le côte. supérieur du rotor (11), rotative avec ce dernier et destinée à la distribution et à la répartition du produit transporté mécaniquement vers le haut,
    d) un raccord (26) disposé centralement au dessus du rotor (11) pour l'évacuation du courant d'air chargé de produit fin,
    e) une trémie (19) de décharge du produit grossier disposée sous le rotor (11) et débouchant sur la voie de broyage (3a).
  7. Installation de broyage selon la revendication 6, caractérisée en ce qu'au moins deux raccords (18a, 18b) répartis symétriquement à la circonférence au-dessus de la sole annulaire de distribution (16) sont prévus pour l'arrivée du produit transporté mécaniquement vers le haut.
  8. Installation de broyage selon la revendication 5, caractérisée en ce qu'un aiguillage (22) à produit est prévu pour permettre de diriger le produit convoyé vers le haut par le dispositif mécanique de transport (21) sélectivement sur le séparateur (9) ou directement sur la voie de broyage (3a).
EP88121321A 1988-01-18 1988-12-20 Procédé et installation de broyage Expired - Lifetime EP0325770B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE3801229A DE3801229A1 (de) 1988-01-18 1988-01-18 Mahlverfahren sowie mahlanlage
DE3801229 1988-01-18

Publications (3)

Publication Number Publication Date
EP0325770A2 EP0325770A2 (fr) 1989-08-02
EP0325770A3 EP0325770A3 (en) 1990-02-14
EP0325770B1 true EP0325770B1 (fr) 1992-04-01

Family

ID=6345452

Family Applications (1)

Application Number Title Priority Date Filing Date
EP88121321A Expired - Lifetime EP0325770B1 (fr) 1988-01-18 1988-12-20 Procédé et installation de broyage

Country Status (5)

Country Link
US (1) US4919341A (fr)
EP (1) EP0325770B1 (fr)
DE (2) DE3801229A1 (fr)
ES (1) ES2030148T3 (fr)
ZA (1) ZA889554B (fr)

Families Citing this family (26)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5251831A (en) * 1991-01-21 1993-10-12 Mitsubishi Jukogyo Kabushiki Kaisha Roller mill
JP2617623B2 (ja) * 1991-01-21 1997-06-04 三菱重工業株式会社 ローラミル
DE4124416A1 (de) * 1991-07-23 1993-01-28 Krupp Polysius Ag Einrichtung und verfahren zur zerkleinerung von mahlgut unterschiedlicher koernung
US5137218A (en) * 1991-08-26 1992-08-11 Western Farmers Electric Cooperative Pulverizer for reducing the possibility of explosions
US5330110A (en) * 1993-07-12 1994-07-19 Williams Robert M Apparatus for grinding material to a fineness grade
DE4323587C2 (de) * 1993-07-14 1996-07-18 Loesche Gmbh Verfahren und Einrichtung zum Zerkleinern von Material unterschiedlicher Körnung
GB9317849D0 (en) * 1993-08-27 1993-10-13 Bpb Industries Plc Improvements in calcination
JP2920876B2 (ja) * 1996-04-18 1999-07-19 川崎重工業株式会社 竪型ローラミルによるセメントクリンカの粉砕装置および方法
LU88753A1 (fr) * 1996-04-30 1996-10-04 Magotteaux Int Piste pour broyeurs
DE19651103A1 (de) * 1996-12-09 1998-06-10 Krupp Polysius Ag Verfahren und Wälzmühle zum Zerkleinern von relativ hartem, sprödem Mahlgut
GB9827670D0 (en) * 1998-12-17 1999-02-10 Erozlu Metin Classifier
US6038987A (en) * 1999-01-11 2000-03-21 Pittsburgh Mineral And Environmental Technology, Inc. Method and apparatus for reducing the carbon content of combustion ash and related products
US6213415B1 (en) 1999-09-13 2001-04-10 W.R. Grace & Co.-Conn. Process for improving grinding of cement clinker in mills employing rollers
AU2002244247B2 (en) 2001-03-01 2007-12-13 Harbor Biosciences, Inc. Use of certain steroids for treatment of blood cell deficiencies
US7156235B2 (en) * 2004-02-26 2007-01-02 Foster Wheeler Energy Corporation Apparatus for and method of classifying particles discharged from a vertical mill
CA2582231A1 (fr) 2004-09-29 2006-10-19 Hollis-Eden Pharmaceuticals, Inc. Analogues de steroides et leurs utilisations
EP1747814A1 (fr) * 2005-07-25 2007-01-31 Claudius Peters Technologies GmbH Broyeur et procédé pour la dessiccation de matière broyée
AU2007214252A1 (en) * 2006-02-07 2007-08-16 Horizon Science Pty Ltd Method for processing material to produce particles of a desired size
PT2273994E (pt) 2008-04-03 2016-03-15 Neurmedix Inc Formas de estado sólido de um produto farmacêutico
FR2986445B1 (fr) * 2012-02-08 2014-02-21 Vicat Presse integrale ventilee
WO2013166179A1 (fr) 2012-05-01 2013-11-07 Innovative Combustion Technologies, Inc. Système de protection de broyeur pulvérisateur
US9604226B2 (en) 2012-05-01 2017-03-28 Innovative Combustion Technologies, Inc. Pulverizer mill protection system
CN104096628A (zh) * 2013-04-08 2014-10-15 国家电网公司 一种具有双入口结构的中速磨煤机
CN104722386B (zh) * 2015-03-25 2017-02-22 广东电网有限责任公司电力科学研究院 磨煤机的风环风速分布测量和调整装置及方法
DE102016121926B4 (de) * 2016-11-15 2019-12-24 Neuman & Esser Process Technology Gmbh Mühle
CN115650704B (zh) * 2022-10-25 2023-08-15 宜兴市国强炉业有限公司 一种高导热耐磨材料及其破碎研磨工艺

Family Cites Families (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3951347A (en) * 1972-09-21 1976-04-20 Polysius Ag Apparatus for crushing material containing particles that are hard to pulverize
DE2600499A1 (de) * 1976-01-08 1977-07-21 Polysius Ag Verfahren und einrichtung zur verarbeitung abrasiven gutes
US4084754A (en) * 1976-07-27 1978-04-18 Loesche Hartzerkleinerungs-Und Zementmaschinen Gmbh & Co. Kg Combined vane-rotor separator
US4597537A (en) * 1982-09-14 1986-07-01 Onoda Cement Company, Ltd. Vertical mill
US4504018A (en) * 1982-12-13 1985-03-12 Foster Wheeler Energy Corporation Particle classifier apparatus and method with rudder control vane
JPS60118250A (ja) * 1983-11-30 1985-06-25 三菱重工業株式会社 固形物質の粉砕方法
DE3418197A1 (de) * 1984-05-16 1985-11-21 Krupp Polysius Ag, 4720 Beckum Mahlverfahren sowie mahlanlage
GB2181971B (en) * 1985-10-29 1988-11-09 Smidth & Co As F L Vertical roller mill
US4752037A (en) * 1987-04-01 1988-06-21 Combustion Engineering, Inc. Vane wheel assembly for rb mills

Also Published As

Publication number Publication date
DE3869759D1 (de) 1992-05-07
EP0325770A3 (en) 1990-02-14
DE3801229A1 (de) 1989-07-27
US4919341A (en) 1990-04-24
ES2030148T3 (es) 1992-10-16
ZA889554B (en) 1989-09-27
EP0325770A2 (fr) 1989-08-02

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