EP1448303B1 - Tube grinder and method for comminuting lumpy grinding stock - Google Patents

Tube grinder and method for comminuting lumpy grinding stock Download PDF

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Publication number
EP1448303B1
EP1448303B1 EP02787865A EP02787865A EP1448303B1 EP 1448303 B1 EP1448303 B1 EP 1448303B1 EP 02787865 A EP02787865 A EP 02787865A EP 02787865 A EP02787865 A EP 02787865A EP 1448303 B1 EP1448303 B1 EP 1448303B1
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EP
European Patent Office
Prior art keywords
grinding
tube mill
grinding chamber
chamber
material quantity
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
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EP02787865A
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German (de)
French (fr)
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EP1448303A1 (en
Inventor
Ludger Schulte
Frank UNGETHÜM
Robert Schnatz
Thomas Rüther
Ludwig KÖNNING
Jens Reimers
Hubert Eickholt
Dirk Dilly
Heinz Alker
Reinhard Giesemann
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ThyssenKrupp Industrial Solutions AG
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Polysius AG
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Publication of EP1448303A1 publication Critical patent/EP1448303A1/en
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Classifications

    • BPERFORMING OPERATIONS; TRANSPORTING
    • B02CRUSHING, PULVERISING, OR DISINTEGRATING; PREPARATORY TREATMENT OF GRAIN FOR MILLING
    • B02CCRUSHING, PULVERISING, OR DISINTEGRATING IN GENERAL; MILLING GRAIN
    • B02C21/00Disintegrating plant with or without drying of the material
    • B02C21/002Disintegrating plant with or without drying of the material using a combination of a roller mill and a drum mill
    • B02C21/005Disintegrating plant with or without drying of the material using a combination of a roller mill and a drum mill the roller mill having cooperating rollers
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B02CRUSHING, PULVERISING, OR DISINTEGRATING; PREPARATORY TREATMENT OF GRAIN FOR MILLING
    • B02CCRUSHING, PULVERISING, OR DISINTEGRATING IN GENERAL; MILLING GRAIN
    • B02C17/00Disintegrating 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
    • B02C17/04Disintegrating 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 unperforated container
    • B02C17/06Disintegrating 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 unperforated container with several compartments
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B02CRUSHING, PULVERISING, OR DISINTEGRATING; PREPARATORY TREATMENT OF GRAIN FOR MILLING
    • B02CCRUSHING, PULVERISING, OR DISINTEGRATING IN GENERAL; MILLING GRAIN
    • B02C17/00Disintegrating 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
    • B02C17/18Details
    • B02C17/183Feeding or discharging devices
    • B02C17/1835Discharging devices combined with sorting or separating of material
    • B02C17/184Discharging devices combined with sorting or separating of material with separator arranged in discharge path of crushing zone
    • B02C17/1845Discharging devices combined with sorting or separating of material with separator arranged in discharge path of crushing zone with return of oversize material to crushing zone

Definitions

  • the invention relates to a tube mill and a method for crushing lumpy material.
  • Tube mills in particular ball mills, are well known. They essentially consist of a first grinding chamber, at least one second grinding chamber and a co-rotating intermediate wall arranged between the grinding chambers. They are used for shredding different materials in various industrial sectors.
  • the material to be crushed is comminuted during the grinding process of the freely movable MahlSystem sectionung inside the grinding chamber, being used as a grinding body both spherical and rod or rod-like body.
  • the intermediate walls in the tube mills serve the purpose of separating the grinding media filling of adjacent grinding chambers from one another and to transport the material being ground in a controlled manner from one to the other grinding chamber.
  • a discharge device is usually arranged in the intermediate wall, through which the grist received via entry openings into the intermediate chamber is discharged via a discharge opening into the second grinding chamber.
  • the invention is based on the object to improve the efficiency of a tube mill and a method for crushing lumpy material to be ground.
  • the inventive method for crushing lumpy material to be ground with a tube mill containing at least a first and a second grinding chamber and a co-rotating between the grinding chambers mitrotierende intermediate wall, the comminuted in the first grinding chamber millbase is divided in an intermediate wall in a first and a second Mahlgutteilmenge, wherein at least a portion of the second Mahlgutteilmenge passes directly or indirectly into the second grinding chamber and at least the first Mahlgutteilmenge is discharged separately from the tube mill.
  • the separating device is formed by a classifying device, so that the first Mahlgutteilmenge consists of coarse material and the second Mahlgutteilmenge consists of fine material.
  • the classifier can be formed, for example, by a sieve or trench wall, a drum screen or Siebhubschaufeln.
  • the discharged first Mahlgutteilmenge can be wholly or partially fed to the Mahlgutiergabe the first grinding chamber or a Vormahlaggregat.
  • the tube mill shown essentially consists of a first grinding chamber 1, a second grinding chamber 2 and a co-rotating intermediate wall 3 arranged between the grinding chambers.
  • the material to be ground 4 passes through a material feed 5 into the first grinding chamber 1, in which it is rotated about a longitudinal center axis by rotation of the tube mill 6 comes to shredding.
  • both grinding chambers contain so-called grinding media, which are adapted in shape, size, quantity and material to the respective needs.
  • the first grinding chamber is usually separated from the intermediate wall 3 by a slot wall 3.4, which has openings 3.5, through which the ground material sufficiently comminuted in the first grinding chamber reaches a first intermediate wall region 3.1.
  • the intermediate wall 3 has, in addition to the first intermediate wall region 3.1, a second intermediate wall 3.3, wherein the two intermediate wall regions are separated from one another by a classifying device 3.2.
  • the integrated classifying device 3.2 divides the material to be ground from the first grinding chamber into a coarse material 8 consisting of first Mahlgutteilmenge and a fine material consisting of 9 second Mahlgutteilmenge.
  • the fine material 9 passes into the second intermediate wall region 3.3 and is there via suitable means, such as lifting elements, the second grinding chamber 2 fed.
  • the coarse material 8 obtained within the classifying device 3.2 is discharged from the tube mill and can be returned to the grinding process at a suitable point (preferably at the grinding stock inlet 4).
  • the classifying device 3.2 is designed as a screen or diaphragm wall.
  • the first partition wall area 3.1 is thereby bounded by the slot wall 3.4 and the classifying device 3.2 and the second partition wall area 3.3 by the classifying device 3.2 and the partition wall 3 separating from the second grinding chamber 2 end wall 3.6.
  • the fine material 9 coming from the first grinding chamber 1 via the opening 3.5 into the first intermediate wall region 3.1 passes unhindered via the classifying device 3.2 into the second intermediate wall region 3.3 and is discharged there via a discharge device (not illustrated in particular lifting blades) into the second grinding chamber 2.
  • the coarse material 8 introduced from the first grinding chamber 1 into the first intermediate wall area 3.1 remains in front of the classifying device 3.2, wherein the coarse material level gradually rises in the first intermediate wall area until it has reached a certain height, at which the coarse material 8 enters a discharge opening 3 within the classifying device 3.2 arranged discharge 3.8 arrived.
  • About an outlet channel 3.9 the coarse material 8 is discharged through a discharge 3.11 from the tube mill.
  • the height of the level of the coarse material 8 can be adjusted in front of the classifying device 3.2 by varying the radial distance of the discharge opening 3.10 from the longitudinal central axis 6.
  • the amount of coarse material 8 discharged can be adjusted by varying the size of the discharge opening 3.10.
  • Fig. 2a-2e is a tube mill with an intermediate wall 10 according to a second embodiment.
  • the intermediate wall 10 is divided into at least one, preferably, but several Siebkammem, which are arranged like a segment around the longitudinal central axis 6.
  • Each screen chamber is bounded by radial side walls 10.9, 10.10 and a part of the first grinding chamber 1 facing slot wall 10.4 and a part of the second grinding chamber 2 facing end wall 10.6.
  • Fig. 2b shows a view of belonging to an intermediate wall chamber portion of the slot wall 10.4.
  • Each intermediate wall chamber is subdivided into a first intermediate wall chamber 10. 1 and a second intermediate wall chamber 10. 3 by a sieve lifting vane 10. 2 designed as a sieve.
  • the inlet openings 10.5 of the slot wall 10.4 are provided only in the region of the first partition wall chamber 10.1, so that the ground in the grinding chamber 1 regrind enters through the inlet openings 10.5 in the first partition chamber 10.1.
  • the material to be ground in the first intermediate wall chamber 10.1 is raised above the sieve lifting blades 10.2.
  • the fine material 9 contained in the material to be ground passes through the sieve openings of Siebhubschaufeln 10.2 in the second partition wall portion 10.3 and is passed there via a Feingutabweisblech 10.11 in the second grinding chamber.
  • the coarse material 8 runs over the Siebhubschaufeln 10.2 and is then promoted via a Grobgutabweisblech 10.12 in a shaft 10.7.
  • About the mill rotation located in the shaft 10.7 Grobgut 8 is discharged from the tube mill.
  • FIG. 3a and 3b variant shown shows an intermediate wall 11, in which the separating or classifying device is formed by a sieve drum 11.2, which divides the intermediate wall into an inner first intermediate wall region 11.1 and an outer second intermediate wall region 11.3.
  • the ground material passes through inlet openings in the slot wall 11.4 in the first intermediate wall region of the screen drum 11.2.
  • the fine material 9 falls through the sieve drum in the second partition wall area 11.3.
  • the coarse material 8 is collected in Grobgutaustragskanal 11.5 and discharged via a Grobgutaustragsschacht from the tube mill.
  • Fig. 4 shows a tube mill with a first grinding chamber 1, a second grinding chamber 2 and arranged between two grinding chambers, mitrotierenden intermediate wall 3.
  • a classifying device is provided, for example, according to one of the in the Fig. 1-3 illustrated variants may be formed.
  • the inner diameter of the first grinding chamber 1 is smaller than the inner diameter of the following in the material flow direction grinding chamber 2.
  • both the ground material from the first grinding chamber 1 and the ground material from the second passes Grinding chamber 2 in a co-rotating intermediate wall 13 arranged between the two grinding chambers.
  • the intermediate wall 13 in turn contains a classifying device 13.2, which may be designed, for example, according to one of the variants indicated above. In the illustrated embodiment, it is formed by a sieve wall.
  • the classifier 13.2 again separates the intermediate wall into a first intermediate wall region 13.1 and a second intermediate wall region 13.3.
  • the intermediate wall 13 is delimited to the first grinding chamber 1 via a slot wall 13.4 and the second grinding chamber 2 via a slot wall 13.6.
  • the millbase from the first grinding chamber 1 passes through inlet openings 13.5 in the first partition wall area 13.1.
  • the ground material from the second grinding chamber 2 passes through inlet openings 13.7 into the second intermediate wall region.
  • the classifying device 13.2 designed as a screen wall allows the fine material to pass from the first intermediate wall region 13.1 into the second intermediate wall region 13.3.
  • the coarse material 8 from the first partition wall area 13.1 is discharged separately via first discharge means 13.8.
  • the fine material 9 and the material to be ground 12 from the second grinding chamber 2 are discharged via second discharge means 13.9 from the tube mill.
  • the material discharged from the second intermediate wall region 13.3 is preferably fed to a separator 16.
  • the material is there divided into finished product 15 and classifier 14, wherein the classifier, preferably on a Mahlgutiergabe 17 of the second grinding chamber 2, are returned to the grinding process again.
  • a tube mill which consist essentially of a first grinding chamber 1, a second grinding chamber 2, and arranged between the grinding chambers, co-rotating intermediate wall 30.
  • a separating device 32 for dividing the ground material from the first grinding chamber 1 in a first Mahlgutteilmenge 8 and a second Mahlgutteilmenge 9 is provided.
  • the separating device is preferably designed as a classifying unit, can in this area only a quantitative distribution can be made. In this way, two or three streams of material can be led out separately from the tube mill, resulting in advantages for the procedural material management.
  • the residence time in the two grinding chambers can be influenced and controlled and, if appropriate, used to optimize the working requirement.
  • Fig. 6-12 shown tube mills can in particular according to one of Fig. 1-5 be described embodiments described.
  • a tube mill is operated in the closed grinding circuit with a classifier 40.
  • the ground material of the first grinding chamber 1 enters the intermediate wall 30 and is divided there into a first Mahlgutteilmenge 8 and a second Mahlgutteilmenge 9. While the first Mahlgutteilmenge 8 is discharged from the tube mill, passes the second Mahlgutteilmenge 9 in the second grinding chamber 2.
  • the discharged from the second grinding chamber 2 Good 18 is given to a classifier 40, which can be formed by a static or dynamic separator or classifier.
  • the fine material of the classifying apparatus is discharged as finished product 19, while the coarse material 20 is transported via a material divider 41 partly or completely into the second grinding chamber 2 or into the first grinding chamber 1.
  • the first grinding chamber 1 is also supplied with the first millbase subset 8 and the fresh material 21.
  • first Mahlgutteilmenge 8 is fed to a classifier 50.
  • the first Mahlgutteilmenge 8 is thus classified outside the tube mill, wherein the coarse material portion of the first grinding chamber 1 is abandoned.
  • the fines of the classifying apparatus 50 can be fed via a material divider 51 completely or partly to the second grinding chamber 2 or the classifying apparatus 40.
  • Fig. 8 The tube mill is operated in a closed grinding circuit with a classifier 40 and a Vorzerkleinticiansshake.
  • the fresh product 21 is fed to a grinding unit 60, which pre-shreds the Malgut.
  • the entire or a part of the pre-shredded material is then the first grinding chamber 1 abandoned.
  • a material divider 61 makes it possible to recirculate part of the pre-shredded material back to the grinding unit 60.
  • the discharged from the tube mill first Mahlgutteilmenge can be supplied via a splitter 52 completely or only part of the first grinding chamber 1 or the grinding unit 60.
  • Fig. 9 shows the variant according to Fig. 7 in conjunction with a grinding unit 60 according to Fig. 8 ,
  • the coarse material of the classifying apparatus 50 can thereby be given up completely or partly to the first grinding chamber 1 or the grinding unit 60.
  • the grinding plant according to Fig. 10 provides a pre-crushing stage with a milling unit 60 in conjunction with a classifier 62.
  • the classifying apparatus can be designed as a static or dynamic classifier.
  • the discharged from the tube mill first Mahlgutteilmenge 8 can be supplied via a material divider 53 in part or completely the first grinding chamber 1, the classifying apparatus 62 or the classifying apparatus 40.
  • the fines of the classifying apparatus 62 are supplied via a material divider 64 either completely or partly to the second grinding chamber 2 or the first grinding chamber 1.
  • the coarse material of the classifying apparatus 62 passes via a material divider 63 either completely or partially into the first grinding chamber 1 and / or to the grinding unit 60, which is thus operated on the one hand with fresh material 21 and on the other with coarse material from the classifying apparatus 62.
  • the coarse material of the grinding unit 60 then passes into the Classifying apparatus 62. There is also the possibility of giving up fresh goods 22, bypassing the pre-shredding, directly to the first painting chamber.
  • the grinding plants according to Fig. 11 and 12 use tube mills with a center discharge.
  • the first Mahlgutteilmenge 8 is discharged separately.
  • the second Mahlgutteilmenge 9 is discharged together with the entering from the second grinding chamber 2 in the intermediate wall material to be ground 23 and the classifying machine 40 abandoned.
  • the coarse material of the classifier 40 is partially or completely abandoned via a material divider 41 of the second grinding chamber 2. Another part can be returned to the first grinding chamber 1.
  • the first Mahlgutteilmenge 8 is supplied via a material divider 53 partially or completely the first grinding chamber 1, the classifier 40 or the classifier 62.
  • the variant according to Fig. 12 differs from the grinding plant according to Fig. 11 in that the second millbase subset 9 and the millbase 23 entering the intermediate wall 2 are discharged separately from one another, so that three material streams, namely the first millbase subset 8, the second millbase subset 9 and the mill base 23, are discharged from the tube mill.
  • the first Mahlgutteilmenge 8 is supplied as before a material divider 53.
  • the material to be ground 23 from the second grinding chamber passes directly into the classifying apparatus 40 while the second Mahlgutteilmenge 9 via a material divider 54 partially or completely the second grinding chamber 2 and / or the classifying machine 40 is abandoned.

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

Description

Die Erfindung betrifft eine Rohrmühle sowie ein Verfahren zur Zerkleinerung von stückigem Mahlgut.The invention relates to a tube mill and a method for crushing lumpy material.

Rohrmühlen, insbesondere Kugelmühlen, sind hinlänglich bekannt. Sie bestehen im Wesentlichen aus einer ersten Mahlkammer, wenigstens einer zweiten Mahlkammer sowie einer zwischen den Mahlkammern angeordneten, mitrotierenden Zwischenwand. Sie werden zur Zerkleinerung unterschiedlicher Materialien in den verschiedensten Industriebereichen eingesetzt.Tube mills, in particular ball mills, are well known. They essentially consist of a first grinding chamber, at least one second grinding chamber and a co-rotating intermediate wall arranged between the grinding chambers. They are used for shredding different materials in various industrial sectors.

Das zu zerkleinernde Material wird beim Mahlprozess von der freibeweglichen Mahlkörperschüttung im Inneren der Mahlkammer zerkleinert, wobei als Mahlkörper sowohl kugelförmige als auch stangen- oder stangenabschnittsartige Körper verwendet werden.The material to be crushed is comminuted during the grinding process of the freely movable Mahlkörperschüttung inside the grinding chamber, being used as a grinding body both spherical and rod or rod-like body.

Durch die Verwendung von getrennten Mahlkammern ist der effektive Einsatz von Mahlkörpern mit unterschiedlicher geometrischer Ausbildung, insbesondere der Einsatz unterschiedlicher Durchmesser bei kugelförmigen Mahlkörpern, möglich. Die einzelnen Mahlkammern können auch unterschiedliche Mahlkörperfüllungsgrade aufweisen.By using separate grinding chambers, the effective use of grinding media with different geometric design, in particular the use of different diameters in spherical grinding media, is possible. The individual grinding chambers can also have different Mahlkörperfüllungsgrade.

Die Zwischenwände in den Rohrmühlen dienen dem Zweck, die Mahlkörperfüllung benachbarter Mahlkammern voneinander zu trennen und das Mahlgut kontrolliert von der einen in die andere Mahlkammer zu transportieren. Hierzu ist in der Zwischenwand üblicherweise eine Austragseinrichtung angeordnet, durch die das über Eintragsöffnungen in die Zwischenkammer gelangte Mahlgut über eine Austragsöffnung in die zweite Mahlkammer ausgetragen wird.The intermediate walls in the tube mills serve the purpose of separating the grinding media filling of adjacent grinding chambers from one another and to transport the material being ground in a controlled manner from one to the other grinding chamber. For this purpose, a discharge device is usually arranged in the intermediate wall, through which the grist received via entry openings into the intermediate chamber is discharged via a discharge opening into the second grinding chamber.

Um die Effizienz der Rohrmühle zu steigern, ist es bereits bekannt, dass aus der ersten Mahlkammer in die Zwischenwand eintretende Mahlgut in Grobgut und Feingut zu trennen, wobei das Feingut über eine Austragsöffnung in die zweite Mahlkammer gelangt und das Grobgut über einen Austragskonus direkt hinter die Zwischenwand in die erste Mahlkammer zurückgeworfen wird.To increase the efficiency of the tube mill, it is already known that from the first grinding chamber in the intermediate wall entering grinding material in coarse material and fine material to separate, wherein the fine material passes through a discharge opening into the second grinding chamber and the coarse material is thrown back via a discharge cone directly behind the partition into the first grinding chamber.

In der DE 378 026 wird eine Rohrmühle mit Mittenaustrag vorgeschlagen, bei der sowohl das Mahlgut aus der ersten Mahlkammer als auch das Mahlgut aus der zweiten Mahlkammer in die Zwischenwand gelangt und von dort gemeinsam ausgeschleust und einer Sichteinrichtung zugeführt wird. Der grobe Rücklauf der Sichtvorrichtung wird wiederum in Grobgut und Feingut aufgeteilt und zur ersten bzw. zweiten Mahlkammer weitergeleitet.In the DE 378 026 a tube mill with center discharge is proposed in which both the material to be ground from the first grinding chamber and the material to be ground from the second grinding chamber passes into the intermediate wall and discharged from there together and fed to a viewing device. The coarse return of the sighting device is in turn divided into coarse material and fine material and forwarded to the first and second grinding chamber.

In der WO 00/12218 werden zwei separate Rohrmühlen mit jeweils einer Mahlkammer vorgeschlagen, die jeweils unterschiedlichen Innendurchmesser haben. Das Mahlgut der ersten Rohrmühle wird einer separaten Klassiereinrichtung zugeführt wobei das Grobgut zurück zur ersten Rohrmühle und das Feingut zur zweiten Rohrmühle geführt wird.In the WO 00/12218 two separate tube mills are proposed, each with a grinding chamber, each having different inner diameter. The millbase of the first tube mill is fed to a separate classifier, wherein the coarse material is fed back to the first tube mill and the fines to the second tube mill.

Aus der BE-A-711 701 und der FR-A-1 478 292 sind Rohrmühlen gemäß dem Oberbegriff des Anspruches 1 bekannt, die jeweils das Feingut aus der Zwischenwand ausschleusen, während das Grobgut in die zweite Mahlkammer gelangt.From the BE-A-711 701 and the FR-A-1 478 292 tube mills are known according to the preamble of claim 1, each of which eject the fines from the intermediate wall, while the coarse material passes into the second grinding chamber.

Der Erfindung liegt nun die Aufgabe zugrunde, den Wirkungsgrad einer Rohrmühle sowie eines Verfahrens zum Zerkleinern von stückigem Mahlgut zu verbessern.The invention is based on the object to improve the efficiency of a tube mill and a method for crushing lumpy material to be ground.

Erfindungsgemäß wird diese Aufgabe durch die Merkmale der Ansprüche 1 und 10 gelöst.According to the invention, this object is solved by the features of claims 1 and 10.

Weitere Ausgestaltungen der Erfindung sind Gegenstand der Unteransprüche.Further embodiments of the invention are the subject of the dependent claims.

Die erfindungsgemäße Rohrmühle besteht im Wesentlichen aus

  1. a. einer ersten Mahlkammer,
  2. b. wenigstens einer zweiten Mahlkammer,
  3. c. einer zwischen den Mahlkammern angeordneten, mitrotierenden Zwischenwand,
  4. d. einer in der Zwischenwand angeordneten Trenneinrichtung zum Aufteilen des Mahlguts aus der ersten Mahlkammer in eine erste Mahlgutteilmenge und eine zweite Mahlgutteilmenge,
  5. e. Mitteln zum direkten oder indirekten Zuführen wenigstens eines Teils der zweiten Mahlgutteilmenge zur zweiten Mahlkammer sowie
  6. f. eine Einrichtung zum separaten Ausschleusen der ersten Mahlgutteilmenge aus der Rohrmühle.
The tube mill according to the invention consists essentially of
  1. a. a first grinding chamber,
  2. b. at least a second grinding chamber,
  3. c. a co-rotating intermediate wall arranged between the grinding chambers,
  4. d. a separation device arranged in the intermediate wall for dividing the ground material from the first grinding chamber into a first Mahlgutteilmenge and a second Mahlgutteilmenge,
  5. e. Means for direct or indirect feeding at least a portion of the second Mahlgutteilmenge to the second grinding chamber and
  6. f. a device for separate discharge of the first Mahlgutteilmenge from the tube mill.

Beim erfindungsgemäßen Verfahren zum Zerkleinern von stückigem Mahlgut mit einer Rohrmühle, enthaltend wenigstens eine erste und eine zweite Mahlkammer sowie eine zwischen den Mahlkammern angeordnete, mitrotierende Zwischenwand, wird das in der ersten Mahlkammer zerkleinerte Mahlgut in einer Zwischenwand in eine erste und eine zweite Mahlgutteilmenge aufgeteilt, wobei zumindest ein Teil der zweiten Mahlgutteilmenge direkt oder indirekt in die zweite Mahlkammer gelangt und zumindest die erste Mahlgutteilmenge separat aus der Rohrmühle ausgeschleust wird.In the inventive method for crushing lumpy material to be ground with a tube mill containing at least a first and a second grinding chamber and a co-rotating between the grinding chambers, mitrotierende intermediate wall, the comminuted in the first grinding chamber millbase is divided in an intermediate wall in a first and a second Mahlgutteilmenge, wherein at least a portion of the second Mahlgutteilmenge passes directly or indirectly into the second grinding chamber and at least the first Mahlgutteilmenge is discharged separately from the tube mill.

Erfindungsgemäß wird die Trenneinrichtung durch eine Klassiereinrichtung gebildet, so dass die erste Mahlgutteilmenge aus Grobgut und die zweite Mahlgutteilmenge aus Feingut besteht. Die Klassiereinrichtung kann beispielsweise durch eine Sieb- bzw. Schlitzwand, ein Trommelsieb oder Siebhubschaufeln gebildet werden. Die ausgeschleuste erste Mahlgutteilmenge kann ganz oder teilweise der Mahlgutaufgabe der ersten Mahlkammer oder einem Vormahlaggregat zugeführt werden.According to the invention the separating device is formed by a classifying device, so that the first Mahlgutteilmenge consists of coarse material and the second Mahlgutteilmenge consists of fine material. The classifier can be formed, for example, by a sieve or trench wall, a drum screen or Siebhubschaufeln. The discharged first Mahlgutteilmenge can be wholly or partially fed to the Mahlgutaufgabe the first grinding chamber or a Vormahlaggregat.

Weitere Vorteile und Ausgestaltungen der Erfindung werden im Folgenden anhand der Beschreibung einige Ausführungsbeispiele und der Zeichnung näher erläutert.Further advantages and embodiments of the invention will be explained in more detail below with reference to the description of some embodiments and the drawings.

In der Zeichnung zeigenIn the drawing show

Fig. 1a - Fig. 1cFig. 1a - Fig. 1c
schematische Darstellungen einer Rohrmühle gemäss einem ersten Ausführungsbeispiel,schematic representations of a tube mill according to a first embodiment,
Fig. 2a - Fig. 2eFig. 2a - Fig. 2e
schematische Darstellungen einer Rohrmühle gemäss einem zweiten Ausführungsbeispiel,schematic representations of a tube mill according to a second embodiment,
Fig. 3a - Fig. 3bFig. 3a - Fig. 3b
schematische Darstellungen einer Rohrmühle gemäss einem dritten Ausführungsbeispiel,schematic representations of a tube mill according to a third embodiment,
Fig. 4Fig. 4
schematische Darstellungen einer Rohrmühle gemäss einem vierten Ausführungsbeispiel,schematic representations of a tube mill according to a fourth embodiment,
Fig. 5a - Fig. 5bFig. 5a - Fig. 5b
schematische Darstellungen einer Rohrmühle gemäss einem fünften Ausführungsbeispiel,schematic representations of a tube mill according to a fifth embodiment,
Fig. 6 - Fig. 12Fig. 6 - Fig. 12
schematische Darstellungen von Mahlanlagen mit einer erfindungsgemäßen Rohrmühle gemäss verschiedener Varianten.schematic representations of grinding plants with a tube mill according to the invention according to various variants.

Die in Fig. 1a-1c dargestellte Rohrmühle besteht im Wesentlichen aus einer ersten Mahlkammer 1, einer zweiten Mahlkammer 2 sowie einer zwischen den Mahlkammern angeordneten, mitrotierenden Zwischenwand 3. Das Mahlgut 4 gelangt über einen Materialaufgabe 5 in die erste Mahlkammer 1, in der es durch Rotation der Rohrmühle um eine Längsmittelachse 6 zur Zerkleinerung kommt. Üblicherweise enthalten beide Mahlkammern sogenannte Mahlkörper, die in Form, Größe, Menge und Material an die jeweiligen Bedürfnisse angepasst sind.In the Fig. 1a-1c The tube mill shown essentially consists of a first grinding chamber 1, a second grinding chamber 2 and a co-rotating intermediate wall 3 arranged between the grinding chambers. The material to be ground 4 passes through a material feed 5 into the first grinding chamber 1, in which it is rotated about a longitudinal center axis by rotation of the tube mill 6 comes to shredding. Usually both grinding chambers contain so-called grinding media, which are adapted in shape, size, quantity and material to the respective needs.

Die erste Mahlkammer ist von der Zwischenwand 3 üblicherweise durch eine Schlitzwand 3.4 getrennt, die Öffnungen 3.5 aufweist, durch die das in der ersten Mahlkammer genügend zerkleinerte Mahlgut in einen ersten Zwischenwandbereich 3.1 gelangt.The first grinding chamber is usually separated from the intermediate wall 3 by a slot wall 3.4, which has openings 3.5, through which the ground material sufficiently comminuted in the first grinding chamber reaches a first intermediate wall region 3.1.

Die Zwischenwand 3 weist neben dem ersten Zwischenwandbereich 3.1 einen zweiten Zwischenwand 3.3 auf, wobei die beiden Zwischenwandbereiche durch eine Klassiereinrichtung 3.2 voneinander getrennt sind. Die integrierte Klassiereinrichtung 3.2 teilt das Mahlgut aus der ersten Mahlkammer in eine aus Grobgut 8 bestehende erste Mahlgutteilmenge und eine aus Feingut 9 bestehende zweite Mahlgutteilmenge auf. Das Feingut 9 gelangt dabei in den zweiten Zwischenwandbereich 3.3 und wird dort über geeignete Mittel, beispielsweise Hubelemente, der zweiten Mahlkammer 2 zugeführt. Das innerhalb der Klassiereinrichtung 3.2 anfallende Grobgut 8 wird aus der Rohrmühle ausgeschleust und kann an geeigneter Stelle (vorzugsweise am Mahlguteinlauf 4) wieder dem Mahlprozess zugeführt werden.The intermediate wall 3 has, in addition to the first intermediate wall region 3.1, a second intermediate wall 3.3, wherein the two intermediate wall regions are separated from one another by a classifying device 3.2. The integrated classifying device 3.2 divides the material to be ground from the first grinding chamber into a coarse material 8 consisting of first Mahlgutteilmenge and a fine material consisting of 9 second Mahlgutteilmenge. The fine material 9 passes into the second intermediate wall region 3.3 and is there via suitable means, such as lifting elements, the second grinding chamber 2 fed. The coarse material 8 obtained within the classifying device 3.2 is discharged from the tube mill and can be returned to the grinding process at a suitable point (preferably at the grinding stock inlet 4).

Im Folgenden wird der Aufbau und die Funktionsweise der Zwischenwand 3 anhand der Fig. 1b und 1c näher erläutert.In the following, the structure and operation of the intermediate wall 3 based on the Fig. 1b and 1c explained in more detail.

Im dargestellten Ausführungsbeispiel ist die Klassiereinrichtung 3.2 als Sieb- bzw. Schlitzwand ausgebildet. Der erste Zwischenwandbereich 3.1 wird dabei von der Schlitzwand 3.4 sowie der Klassiereinrichtung 3.2 und der zweite Zwischenwandbereich 3.3 durch die Klassiereinrichtung 3.2 und eine die Zwischenwand 3 von der zweiten Mahlkammer 2 trennende Stirnwand 3.6 begrenzt.In the illustrated embodiment, the classifying device 3.2 is designed as a screen or diaphragm wall. The first partition wall area 3.1 is thereby bounded by the slot wall 3.4 and the classifying device 3.2 and the second partition wall area 3.3 by the classifying device 3.2 and the partition wall 3 separating from the second grinding chamber 2 end wall 3.6.

Das aus der ersten Mahlkammer 1 über die Öffnung 3.5 in den ersten Zwischenwandbereich 3.1 kommende Feingut 9 gelangt ungehindert über die Klassiereinrichtung 3.2 in den zweiten Zwischenwandbereich 3.3 und wird dort über eine nicht näher dargestellte Austragseinrichtung (insbesondere Hubschaufeln) in die zweite Mahlkammer 2 ausgetragen.The fine material 9 coming from the first grinding chamber 1 via the opening 3.5 into the first intermediate wall region 3.1 passes unhindered via the classifying device 3.2 into the second intermediate wall region 3.3 and is discharged there via a discharge device (not illustrated in particular lifting blades) into the second grinding chamber 2.

Das aus der ersten Mahlkammer 1 in den ersten Zwischenwandbereich 3.1 eingetragene Grobgut 8 verbleibt vor der Klassiereinrichtung 3.2, wobei der Grobgutspiegel im ersten Zwischenwandbereich allmählich steigt, bis er eine bestimmte Höhe erreicht hat, bei der das Grobgut 8 über eine konstruktiv vorgesehene Austragsöffnung 3.10 in eine innerhalb der Klassiereinrichtung 3.2 angeordnete Austragseinrichtung 3.8 gelangt. Über einen Austrittskanal 3.9 wird das Grobgut 8 durch ein Austragsgehäuse 3.11 aus der Rohrmühle ausgeschleust.The coarse material 8 introduced from the first grinding chamber 1 into the first intermediate wall area 3.1 remains in front of the classifying device 3.2, wherein the coarse material level gradually rises in the first intermediate wall area until it has reached a certain height, at which the coarse material 8 enters a discharge opening 3 within the classifying device 3.2 arranged discharge 3.8 arrived. About an outlet channel 3.9 the coarse material 8 is discharged through a discharge 3.11 from the tube mill.

Je nach verfahrenstechnischen Anforderungen und Erfordernissen kann die Höhe des Pegels des Grobguts 8 vor der Klassiereinrichtung 3.2 durch Variation des radialen Abstands der Austragsöffnung 3.10 von der Längsmittelachse 6 eingestellt werden. Die Menge des ausgeschleusten Grobgut 8 kann durch Variation der Größe der Austragsöffnung 3.10 eingestellt werden.Depending on the procedural requirements and requirements, the height of the level of the coarse material 8 can be adjusted in front of the classifying device 3.2 by varying the radial distance of the discharge opening 3.10 from the longitudinal central axis 6. The amount of coarse material 8 discharged can be adjusted by varying the size of the discharge opening 3.10.

In Fig. 2a-2e ist eine Rohrmühle mit einer Zwischenwand 10 gemäss einem zweiten Ausführungsbeispiel.In Fig. 2a-2e is a tube mill with an intermediate wall 10 according to a second embodiment.

Die Zwischenwand 10 ist in mindestens eine, vorzugsweise, aber mehrere Siebkammem aufgeteilt, die segmentartig um die Längsmittelachse 6 angeordnet sind. Jede Siebkammer wird durch radiale Seitenwände 10.9, 10.10 sowie einen Teil der zur ersten Mahlkammer 1 weisenden Schlitzwand 10.4 sowie einen Teil der zur zweiten Mahlkammer 2 weisenden Stirnwand 10.6 begrenzt. Fig. 2b zeigt eine Ansicht des zu einer Zwischenwandkammer gehörenden Abschnitts der Schlitzwand 10.4. Jede Zwischenwandkammer wird durch eine als Sieb ausgebildete Siebhubschaufel 10.2 in eine erste Zwischenwandkammer 10.1 und eine zweite Zwischenwandkammer 10.3 unterteilt. Die Eintrittsöffnungen 10.5 der Schlitzwand 10.4 sind lediglich im Bereich der ersten Zwischenwandkammer 10.1 vorgesehen, sodass das in der Mahlkammer 1 gemahlene Mahlgut durch die Eintrittsöffnungen 10.5 in die erste Zwischenwandkammer 10.1 eintritt. Durch die Rotation der Rohrmühle wird das in der ersten Zwischenwandkammer 10.1 befindliche Mahlgut über die Siebhubschaufeln 10.2 angehoben. Das im Mahlgut enthaltende Feingut 9 gelangt durch die Sieböffnungen der Siebhubschaufeln 10.2 in den zweiten Zwischenwandbereich 10.3 und wird dort über ein Feingutabweisblech 10.11 in die zweite Mahlkammer geleitet. Das Grobgut 8 hingegen läuft über die Siebhubschaufeln 10.2 und wird dann über ein Grobgutabweisblech 10.12 in einen Schacht 10.7 gefördert. Über die Mühlenrotation wird das im Schacht 10.7 befindliche Grobgut 8 aus der Rohrmühle ausgeschleust.The intermediate wall 10 is divided into at least one, preferably, but several Siebkammem, which are arranged like a segment around the longitudinal central axis 6. Each screen chamber is bounded by radial side walls 10.9, 10.10 and a part of the first grinding chamber 1 facing slot wall 10.4 and a part of the second grinding chamber 2 facing end wall 10.6. Fig. 2b shows a view of belonging to an intermediate wall chamber portion of the slot wall 10.4. Each intermediate wall chamber is subdivided into a first intermediate wall chamber 10. 1 and a second intermediate wall chamber 10. 3 by a sieve lifting vane 10. 2 designed as a sieve. The inlet openings 10.5 of the slot wall 10.4 are provided only in the region of the first partition wall chamber 10.1, so that the ground in the grinding chamber 1 regrind enters through the inlet openings 10.5 in the first partition chamber 10.1. As a result of the rotation of the tube mill, the material to be ground in the first intermediate wall chamber 10.1 is raised above the sieve lifting blades 10.2. The fine material 9 contained in the material to be ground passes through the sieve openings of Siebhubschaufeln 10.2 in the second partition wall portion 10.3 and is passed there via a Feingutabweisblech 10.11 in the second grinding chamber. The coarse material 8, however, runs over the Siebhubschaufeln 10.2 and is then promoted via a Grobgutabweisblech 10.12 in a shaft 10.7. About the mill rotation located in the shaft 10.7 Grobgut 8 is discharged from the tube mill.

Die in den Fig. 3a und 3b dargestellte Variante zeigt eine Zwischenwand 11, bei der die Trenn- bzw. Klassiereinrichtung durch eine Siebtrommel 11.2 gebildet wird, die die Zwischenwand in einen inneren ersten Zwischenwandbereich 11.1 und einen äußeren zweiten Zwischenwandbereich 11.3 unterteilt.The in the Fig. 3a and 3b variant shown shows an intermediate wall 11, in which the separating or classifying device is formed by a sieve drum 11.2, which divides the intermediate wall into an inner first intermediate wall region 11.1 and an outer second intermediate wall region 11.3.

Das Mahlgut gelangt über Eintrittsöffnungen in der Schlitzwand 11.4 in den ersten Zwischenwandbereich der Siebtrommel 11.2. Auf dem Weg zum Grobgutaustragskanal 11.5, der am Ende der Siebtrommel angeordnet ist, fällt das Feingut 9 durch die Siebtrommel in den zweiten Zwischenwandbereich 11.3. Über Förderbleche 11.6, die vorzugsweise als Schneckenbleche ausgebildet sind, wird das Feingut 9 in die zweite Mahlkammer 2 gefördert. Das Grobgut 8 wird im Grobgutaustragskanal 11.5 gesammelt und über einen Grobgutaustragsschacht aus der Rohrmühle ausgeschleust.The ground material passes through inlet openings in the slot wall 11.4 in the first intermediate wall region of the screen drum 11.2. On the way to Grobgutaustragskanal 11.5, which is arranged at the end of the sieve drum, the fine material 9 falls through the sieve drum in the second partition wall area 11.3. About conveyor plates 11.6, which are preferably designed as screw plates, the fines 9 is conveyed into the second grinding chamber 2. The coarse material 8 is collected in Grobgutaustragskanal 11.5 and discharged via a Grobgutaustragsschacht from the tube mill.

Das Ausführungsbeispiel gemäss Fig. 4 zeigt eine Rohrmühle mit einer ersten Mahlkammer 1, einer zweiten Mahlkammer 2 sowie einer zwischen beiden Mahlkammern angeordneten, mitrotierenden Zwischenwand 3. In der Zwischenwand ist eine Klassiereinrichtung vorgesehen, die beispielsweise nach einer der in den Fig. 1-3 dargestellten Varianten ausgebildet sein kann.The embodiment according to Fig. 4 shows a tube mill with a first grinding chamber 1, a second grinding chamber 2 and arranged between two grinding chambers, mitrotierenden intermediate wall 3. In the intermediate wall, a classifying device is provided, for example, according to one of the in the Fig. 1-3 illustrated variants may be formed.

Der Innendurchmesser der ersten Mahlkammer 1 ist dabei kleiner als der Innendurchmesser der in Materialflussrichtung folgenden Mahlkammer 2. Durch einen solchen Stufensprung kann eine optimierte Geometrie erzeugt werden, die dem Mahlkörperfüllungsgrad, den Mahlkörperabmessungen, der Art des Mahlguts usw. Rechnung trägt.The inner diameter of the first grinding chamber 1 is smaller than the inner diameter of the following in the material flow direction grinding chamber 2. By such a step jump an optimized geometry can be generated, which takes into account the Mahlkörperfüllungsgrad, the Mahlkörperabmessungen, the type of ground material, etc..

Während bei allen bisher gezeigten Varianten das Feingut direkt über eine die Zwischenwand von der zweiten Mahlgutkammer trennende Stirnwand in die zweite Mahlkammer gelangt, ist im Ausführungsbeispiel gemäss Fig. 5a und 5b ein sogenannter Mittenaustrag vorgesehen. Bei einer derartigen Rohrmühle gelangt sowohl das Mahlgut aus der ersten Mahlkammer 1 als auch das Mahlgut aus der zweiten Mahlkammer 2 in einer zwischen beiden Mahlkammern angeordneten, mitrotierenden Zwischenwand 13. Die Zwischenwand 13 enthält wiederum eine Klassiereinrichtung 13.2, die beispielsweise nach einer der oben aufgezeigten Varianten ausgebildet sein kann. Im dargestellten Ausführungsbeispiel wird sie durch eine Siebwand gebildet. Die Klassiereinrichtung 13.2 trennt die Zwischenwand wiederum in einen ersten Zwischenwandbereich 13.1 und einen zweiten Zwischenwandbereich 13.3.While in all the variants shown so far, the fine material passes directly into the second grinding chamber via an end wall separating the intermediate wall from the second grinding chamber, according to the exemplary embodiment Fig. 5a and 5b provided a so-called center discharge. In such a tube mill, both the ground material from the first grinding chamber 1 and the ground material from the second passes Grinding chamber 2 in a co-rotating intermediate wall 13 arranged between the two grinding chambers. The intermediate wall 13 in turn contains a classifying device 13.2, which may be designed, for example, according to one of the variants indicated above. In the illustrated embodiment, it is formed by a sieve wall. The classifier 13.2 again separates the intermediate wall into a first intermediate wall region 13.1 and a second intermediate wall region 13.3.

Die Zwischenwand 13 wird zur ersten Mahlkammer 1 über eine Schlitzwand 13.4 und zur zweiten Mahlkammer 2 über eine Schlitzwand 13.6 abgegrenzt. Das Mahlgut aus der ersten Mahlkammer 1 tritt über Eintrittsöffnungen 13.5 in den ersten Zwischenwandbereich 13.1. Das Mahlgut aus der zweiten Mahlkammer 2 gelangt über Eintrittsöffnungen 13.7 in den zweiten Zwischenwandbereich. Die als Siebwand ausgebildete Klassiereinrichtung 13.2 lässt das Feingut aus dem ersten Zwischenwandbereich 13.1 in den zweiten Zwischenwandbereich 13.3 passieren.The intermediate wall 13 is delimited to the first grinding chamber 1 via a slot wall 13.4 and the second grinding chamber 2 via a slot wall 13.6. The millbase from the first grinding chamber 1 passes through inlet openings 13.5 in the first partition wall area 13.1. The ground material from the second grinding chamber 2 passes through inlet openings 13.7 into the second intermediate wall region. The classifying device 13.2 designed as a screen wall allows the fine material to pass from the first intermediate wall region 13.1 into the second intermediate wall region 13.3.

Das Grobgut 8 aus dem ersten Zwischenwandbereich 13.1 wird über erste Austragsmittel 13.8 separat ausgeschleust. Das Feingut 9 und das Mahlgut 12 aus der zweiten Mahlkammer 2 werden über zweite Austragsmittel 13.9 aus der Rohrmühle ausgetragen. Gemäss Fig. 5a wird das aus dem zweiten Zwischenwandbereich 13.3 ausgetragene Gut vorzugsweise einem Sichter 16 aufgegeben. Das Gut wird dort in Fertiggut 15 und Sichtergrieße 14 aufgeteilt, wobei die Sichtergrieße, vorzugsweise über eine Mahlgutaufgabe 17 der zweiten Mahlkammer 2, wieder den Mahlprozess zurückgeführt werden.The coarse material 8 from the first partition wall area 13.1 is discharged separately via first discharge means 13.8. The fine material 9 and the material to be ground 12 from the second grinding chamber 2 are discharged via second discharge means 13.9 from the tube mill. According to Fig. 5a For example, the material discharged from the second intermediate wall region 13.3 is preferably fed to a separator 16. The material is there divided into finished product 15 and classifier 14, wherein the classifier, preferably on a Mahlgutaufgabe 17 of the second grinding chamber 2, are returned to the grinding process again.

Im Folgenden werden verschiedene Mahlanlagen beschrieben, die jeweils eine Rohrmühle aufweisen, die im Wesentlichen aus einer ersten Mahlkammer 1, einer zweiten Mahlkammer 2, und einer zwischen den Mahlkammern angeordneten, mitrotierenden Zwischenwand 30 bestehen. In der Zwischenwand ist ein Trenneinrichtung 32 zum Aufteilen des Mahlguts aus der ersten Mahlkammer 1 in eine erste Mahlgutteilmenge 8 und eine zweite Mahlgutteilmenge 9 vorgesehen. Wenngleich die Trenneinrichtung vorzugsweise als Klassiereinheit ausgebildet, kann in diesem Bereich auch lediglich eine mengenmäßige Aufteilung vorgenommen werden. Auf diese Weise können aus der Rohrmühle zwei bzw. drei Materialströme separat herausgeführt werden, wodurch sich Vorteile für die verfahrenstechnische Materialführung ergeben. So kann insbesondere die Verweilzeit in den beiden Mahlkammern beeinflusst und kontrolliert werden und gegebenenfalls zur Optimierung des Arbeitsbedarfes verwendet werden.In the following, various grinding plants are described, each having a tube mill, which consist essentially of a first grinding chamber 1, a second grinding chamber 2, and arranged between the grinding chambers, co-rotating intermediate wall 30. In the intermediate wall, a separating device 32 for dividing the ground material from the first grinding chamber 1 in a first Mahlgutteilmenge 8 and a second Mahlgutteilmenge 9 is provided. Although the separating device is preferably designed as a classifying unit, can in this area only a quantitative distribution can be made. In this way, two or three streams of material can be led out separately from the tube mill, resulting in advantages for the procedural material management. In particular, the residence time in the two grinding chambers can be influenced and controlled and, if appropriate, used to optimize the working requirement.

Die in den Fig. 6-12 dargestellten Rohrmühlen können insbesondere nach einem der Fig. 1-5 beschriebenen Ausführungsbeispiele ausgestaltet sein.The in the Fig. 6-12 shown tube mills can in particular according to one of Fig. 1-5 be described embodiments described.

In Fig. 6 wird eine Rohrmühle im geschlossenen Mahlkreislauf mit einem Klassierapparat 40 betrieben. Dass Mahlgut der ersten Mahlkammer 1 gelangt in die Zwischenwand 30 und wird dort in eine erste Mahlgutteilmenge 8 und eine zweite Mahlgutteilmenge 9 aufgeteilt. Während die erste Mahlgutteilmenge 8 aus der Rohrmühle ausgeschleust wird, gelangt die zweite Mahlgutteilmenge 9 in die zweite Mahlkammer 2. Das aus der zweiten Mahlkammer 2 ausgetragene Gut 18 wird einem Klassierapparat 40 aufgegeben, welcher durch einen statischen oder dynamischen Sichter oder Klassierer gebildet werden kann. Das Feingut des Klassierapparats wird als Fertiggut 19 abgeführt, während das Grobgut 20 über einen Materialteiler 41 zum Teil oder vollständig in die zweite Mahlkammer 2 oder in die erste Mahlkammer 1 transportiert wird. Der ersten Mahlkammer 1 wird neben dem gegebenenfalls vom Klassierapparat 40 rückgeführten Grobgut 20 außerdem die erste Mahlgutteilmenge 8 sowie Frischgut 21 aufgegeben.In Fig. 6 a tube mill is operated in the closed grinding circuit with a classifier 40. The ground material of the first grinding chamber 1 enters the intermediate wall 30 and is divided there into a first Mahlgutteilmenge 8 and a second Mahlgutteilmenge 9. While the first Mahlgutteilmenge 8 is discharged from the tube mill, passes the second Mahlgutteilmenge 9 in the second grinding chamber 2. The discharged from the second grinding chamber 2 Good 18 is given to a classifier 40, which can be formed by a static or dynamic separator or classifier. The fine material of the classifying apparatus is discharged as finished product 19, while the coarse material 20 is transported via a material divider 41 partly or completely into the second grinding chamber 2 or into the first grinding chamber 1. In addition to the coarse material 20, which may be recirculated by the classifier 40, the first grinding chamber 1 is also supplied with the first millbase subset 8 and the fresh material 21.

Die in Fig. 7 dargestellte Mahlanlage unterscheidet sich vom vorhergehenden Ausführungsbeispiel dadurch, dass die aus der Zwischenwand ausgeschleuste erste Mahlgutteilmenge 8 einem Klassierapparat 50 zugeführt wird. Die erste Mahlgutteilmenge 8 wird somit außerhalb der Rohrmühle klassiert, wobei der Grobgutanteil wieder der ersten Mahlkammer 1 aufgegeben wird. Das Feingut des Klassierapparats 50 kann über einen Materialteiler 51 vollständig oder zum Teil der zweiten Mahlkammer 2 oder dem Klassierapparat 40 zugeführt werden.In the Fig. 7 Milling plant shown differs from the previous embodiment in that the discharged from the intermediate wall first Mahlgutteilmenge 8 is fed to a classifier 50. The first Mahlgutteilmenge 8 is thus classified outside the tube mill, wherein the coarse material portion of the first grinding chamber 1 is abandoned. The fines of the classifying apparatus 50 can be fed via a material divider 51 completely or partly to the second grinding chamber 2 or the classifying apparatus 40.

In Fig. 8 wird die Rohrmühle im geschlossenen Mahlkreislauf mit einem Klassierapparat 40 und einer Vorzerkleinerungsstufe betrieben. Im Unterschied zur Mahlanlage gemäss Fig. 6 wird das Frischgut 21 einem Mahlaggregat 60 zugeführt, welches das Malgut vorzerkleinert. Das gesamte oder auch ein Teil des vorzerkleinerten Materials wird anschließend der ersten Mahlkammer 1 aufgegeben. Über einen Materialteiler 61 besteht die Möglichkeit, einen Teil des vorzerkleinerten Materials wieder zum Mahlaggregat 60 zu rezirkulieren.In Fig. 8 The tube mill is operated in a closed grinding circuit with a classifier 40 and a Vorzerkleinerungsstufe. In contrast to the grinding plant according to Fig. 6 the fresh product 21 is fed to a grinding unit 60, which pre-shreds the Malgut. The entire or a part of the pre-shredded material is then the first grinding chamber 1 abandoned. A material divider 61 makes it possible to recirculate part of the pre-shredded material back to the grinding unit 60.

Die aus der Rohrmühle ausgeschleuste erste Mahlgutteilmenge kann über einen Splitter 52 vollständig oder nur zu einem Teil der ersten Mahlkammer 1 oder dem Mahlaggregat 60 zugeführt werden.The discharged from the tube mill first Mahlgutteilmenge can be supplied via a splitter 52 completely or only part of the first grinding chamber 1 or the grinding unit 60.

Fig. 9 zeigt die Variante gemäss Fig. 7 in Verbindung mit einem Mahlaggregat 60 gemäss Fig. 8. Dass Grobgut des Klassierapparat 50 kann dabei vollständig oder zum Teil der ersten Mahlkammer 1 oder dem Mahlaggregat 60 aufgeben werden. Fig. 9 shows the variant according to Fig. 7 in conjunction with a grinding unit 60 according to Fig. 8 , The coarse material of the classifying apparatus 50 can thereby be given up completely or partly to the first grinding chamber 1 or the grinding unit 60.

Die Mahlanlage gemäss Fig. 10 sieht eine Vorzerkleinerungsstufe mit einem Mahlaggregat 60 in Verbindung mit einem Klassierapparat 62 vor. Der Klassierapparat kann als statischer oder dynamischer Sichter ausgebildet sein.The grinding plant according to Fig. 10 provides a pre-crushing stage with a milling unit 60 in conjunction with a classifier 62. The classifying apparatus can be designed as a static or dynamic classifier.

Die aus der Rohrmühle ausgeschleuste erste Mahlgutteilmenge 8 kann über einen Materialteiler 53 zum Teil oder vollständig der ersten Mahlkammer 1, dem Klassierapparat 62 oder dem Klassierapparat 40 zugeführt werden. Das Feingut des Klassierapparates 62 wird über einen Materialteiler 64 entweder vollständig oder zum Teil der zweiten Mahlkammer 2 oder der ersten Mahlkammer 1 zugeführt. Das Grobgut des Klassierapparates 62 gelangt über einen Materialteiler 63 entweder vollständig oder zum Teil in die erste Mahlkammer 1 und/oder zum Mahlaggregat 60, welches somit zum einen mit Frischgut 21 und zum anderen mit Grobgut aus dem Klassierapparat 62 betrieben wird. Das Grobgut des Mahlaggregat 60 gelangt dann in den Klassierapparat 62. Es besteht außerdem die Möglichkeit Frischgut 22 unter Umgehung der Vorzerkleinerung direkt der ersten Malkammer aufzugeben.The discharged from the tube mill first Mahlgutteilmenge 8 can be supplied via a material divider 53 in part or completely the first grinding chamber 1, the classifying apparatus 62 or the classifying apparatus 40. The fines of the classifying apparatus 62 are supplied via a material divider 64 either completely or partly to the second grinding chamber 2 or the first grinding chamber 1. The coarse material of the classifying apparatus 62 passes via a material divider 63 either completely or partially into the first grinding chamber 1 and / or to the grinding unit 60, which is thus operated on the one hand with fresh material 21 and on the other with coarse material from the classifying apparatus 62. The coarse material of the grinding unit 60 then passes into the Classifying apparatus 62. There is also the possibility of giving up fresh goods 22, bypassing the pre-shredding, directly to the first painting chamber.

Die Mahlanlagen gemäss Fig. 11 und 12 verwenden Rohrmühlen mit einem Mittenaustrag. Im Ausführungsbeispiel gemäss Fig. 11 wird wiederum die erste Mahlgutteilmenge 8 separat ausgetragen. Die zweite Mahlgutteilmenge 9 wird zusammen mit dem aus der zweiten Mahlkammer 2 in die Zwischenwand eintretenden Mahlgut 23 ausgetragen und dem Klassierapparat 40 aufgegeben. Das Grobgut des Klassierapparates 40 wird über einen Materialteiler 41 teilweise oder vollständig der zweiten Mahlkammer 2 aufgegeben. Ein anderer Teil kann zur ersten Mahlkammer 1 zurückgeführt werden. Die erste Mahlgutteilmenge 8 wird über einen Materialteiler 53 teilweise oder vollständig der ersten Mahlkammer 1, dem Klassierapparat 40 oder dem Klassierapparat 62 zugeführt.The grinding plants according to Fig. 11 and 12 use tube mills with a center discharge. In the embodiment according to Fig. 11 in turn, the first Mahlgutteilmenge 8 is discharged separately. The second Mahlgutteilmenge 9 is discharged together with the entering from the second grinding chamber 2 in the intermediate wall material to be ground 23 and the classifying machine 40 abandoned. The coarse material of the classifier 40 is partially or completely abandoned via a material divider 41 of the second grinding chamber 2. Another part can be returned to the first grinding chamber 1. The first Mahlgutteilmenge 8 is supplied via a material divider 53 partially or completely the first grinding chamber 1, the classifier 40 or the classifier 62.

Die Variante gemäss Fig. 12 unterscheidet sich von der Mahlanlage gemäss Fig. 11 dadurch, dass die zweite Mahlgutteilmenge 9 und das aus der zweiten Mahlkammer 2 in die Zwischenwand eintretende Mahlgut 23 getrennt voneinander ausgetragen werden, so dass aus der Rohrmühle drei Materialströme, nämlich die erste Mahlgutteilmenge 8, die zweite Mahlgutteilmenge 9 und das Mahlgut 23 ausgetragen werden. Die erste Mahlgutteilmenge 8 wird wie bisher einen Materialteiler 53 zugeführt. Das Mahlgut 23 aus der zweiten Mahlkammer gelangt direkt in den Klassierapparat 40 während die zweite Mahlgutteilmenge 9 über einen Materialteiler 54 teilweise oder vollständig der zweiten Mahlkammer 2 und/oder dem Klassierapparat 40 aufgegeben wird.The variant according to Fig. 12 differs from the grinding plant according to Fig. 11 in that the second millbase subset 9 and the millbase 23 entering the intermediate wall 2 are discharged separately from one another, so that three material streams, namely the first millbase subset 8, the second millbase subset 9 and the mill base 23, are discharged from the tube mill. The first Mahlgutteilmenge 8 is supplied as before a material divider 53. The material to be ground 23 from the second grinding chamber passes directly into the classifying apparatus 40 while the second Mahlgutteilmenge 9 via a material divider 54 partially or completely the second grinding chamber 2 and / or the classifying machine 40 is abandoned.

Die oben aufgezeigten Varianten von Mahlanlagen sind lediglich beispielhaft zu verstehen. Sie zeigen jedoch, dass die ausgeschleuste erste Mahlgutteilmenge auf vielfältige Weise vor- bzw. nachgeschalteten Anlagenteilen zugeführt werden kann. Dadurch wird eine bessere Mahleffizienz und Vorteile in der Materialführung ermöglicht, wodurch der spezifische Arbeitsbedarf verringert werden kann.The above-mentioned variants of grinding plants are to be understood as exemplary only. However, they show that the discharged first Mahlgutteilmenge can be supplied in a variety of ways upstream or downstream equipment parts. This allows better grinding efficiency and material handling advantages, which can reduce specific workload.

Claims (18)

  1. A tube mill comprising
    a. a first grinding chamber (1),
    b. at least one second grinding chamber (2),
    c. a jointly rotating partition (3) arranged between the grinding chambers,
    d. a classifier (3.2), arranged in the partition, for dividing the grinding material from the first grinding chamber into a first grinding-material quantity (8) and a second grinding-material quantity (9),
    e. means for supplying at least some of the second grinding-material quantity to the second grinding chamber,
    f. a device (3.8) for separately discharging the first grinding-material quantity from the tube mill,
    characterised in that the classifier (3.2) is formed so that the first grinding-material quantity consists of coarse material and the second grinding-material quantity consists of fine material.
  2. A tube mill according to claim 1, characterised by means for supplying the discharged first grinding-material quantity to the grinding-material feeder (5) of the first grinding chamber.
  3. A tube mill according to claim 1, characterised in that the means for supplying the second grinding-material quantity to the second grinding chamber (2) are arranged so that the second grinding-material quantity (9) passes into the second grinding chamber (2) via an end wall (3.6) separating the partition from the second grinding chamber.
  4. A tube mill according to claim 1, characterised in that the partition has a first and a second partition region (3.1, 3.3), wherein the two partition regions are separated from one another by the separator (3.2), and the device for discharging the first grinding-material quantity from the tube mill communicates with the first partition region and the means for supplying the second grinding-material quantity to the second grinding chamber communicate with the second partition region.
  5. A tube mill according to claim 1, characterised in that the inner diameter of the first grinding chamber (1) is smaller than the inner diameter of the second grinding chamber (2).
  6. A tube mill according to claim 1, characterised in that the separator is formed by a screening or slotted wall (3.2).
  7. A tube mill according to claim 1, characterised in that the separator is formed by a screening drum (11.2).
  8. A tube mill according to claim 1, characterised in that the separator is formed by lifting vanes provided in the partition, wherein the lifting vanes are formed as screening lifting vanes (10.2).
  9. A tube mill according to claim 1, characterised by means (13.7) for transferring the grinding material from the second grinding chamber (2) to the partition (13) and means (13.9) for discharging the material coming from the second grinding chamber and for discharging the second grinding-material quantity from the tube mill.
  10. A method of comminuting lumpy grinding material in a tube mill, containing at least one first and one second grinding chamber (1, 2) and a jointly rotating partition (30) arranged between the grinding chambers, wherein the grinding material ground in the first grinding chamber is classified in the partition and divided into a first and a second grinding-material quantity (8, 9), wherein the one grinding-material quantity (8) consists of coarse material and the other (9) consists of fine material, and wherein at least some of the second grinding-material quantity (9) passes into the second grinding chamber (2) and at least the first grinding-material quantity (8) is discharged separately from the tube mill, characterised in that the first grinding-material quantity (8) is formed by the coarse material and the second grinding-material quantity (9) is formed by the fine material.
  11. A method according to claim 10, characterised in that at least some of the discharged first grinding-material quantity (8) is fed back to the grinding-material feeder of the first grinding chamber (1).
  12. A method according to claim 10, characterised in that one part of the discharged first grinding-material quantity (8) is fed back to the grinding-material feeder of the first grinding chamber (1) and the other part is fed back to a classifying apparatus (40) arranged outside the tube mill.
  13. A method according to claim 10, characterised in that the discharged first grinding-material quantity (8) is fed back to a classifying apparatus (40, 62) arranged outside the tube mill.
  14. A method according to claim 10, characterised in that the grinding material ground in the second grinding chamber (2) is fed to a classifying apparatus (40) arranged outside the tube mill, wherein the coarse material (20) accumulating therein is fed back to the second grinding chamber (2) and/or to the first grinding chamber (1).
  15. A method according to claim 10, characterised in that the grinding material to be supplied to the tube mill is first fed to a precomminuting stage (60).
  16. A method according to claim 10, characterised in that the grinding material to be supplied to the tube mill is first fed to a precomminuting stage and in that one part of the discharged first grinding-material quantity (8) is fed to the precomminuting stage again, while the other part is conveyed to the grinding-material feeder of the first grinding chamber.
  17. A method according to claim 10, characterised in that the grinding material to be supplied to the tube mill is first fed to a precomminuting stage (60) and some of the precomminuted material is recirculated to the precomminuting stage.
  18. A method according to claim 10, characterised in that the grinding material to be supplied to the tube mill is first fed to a precomminuting stage (60) and the precomminuted material is supplied to a classifying apparatus (62) arranged downstream, the coarse material from which is conducted to the first grinding chamber (1) and/or to the precomminuting stage (60) and the fine material from which passes to the second grinding chamber (2).
EP02787865A 2001-11-29 2002-11-28 Tube grinder and method for comminuting lumpy grinding stock Expired - Lifetime EP1448303B1 (en)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
DE10158710 2001-11-29
DE10158710 2001-11-29
PCT/EP2002/013461 WO2003045563A1 (en) 2001-11-29 2002-11-28 Tube grinder and method for comminuting lumpy grinding stock

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EP1448303A1 EP1448303A1 (en) 2004-08-25
EP1448303B1 true EP1448303B1 (en) 2008-08-27

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Application Number Title Priority Date Filing Date
EP02787865A Expired - Lifetime EP1448303B1 (en) 2001-11-29 2002-11-28 Tube grinder and method for comminuting lumpy grinding stock

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US (1) US7073737B2 (en)
EP (1) EP1448303B1 (en)
AU (1) AU2002352181A1 (en)
DE (1) DE50212715D1 (en)
DK (1) DK1448303T3 (en)
WO (1) WO2003045563A1 (en)

Families Citing this family (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102004045959A1 (en) * 2004-09-22 2006-03-23 Polysius Ag Mill material milling system, has rough mill area that is formed in such a manner that less than twenty five percent of applied driving power of pipe mill is transferred within rough mill area
DE102005007254A1 (en) * 2005-02-16 2006-08-17 Polysius Ag Grinding plant and process for grinding regrind
DE102010017394A1 (en) * 2010-06-16 2011-12-22 Polysius Ag Process for comminuting regrind by means of a tube mill
JP5825646B2 (en) * 2011-03-31 2015-12-02 有限会社大東土木 Grinder
US20160030944A1 (en) * 2014-08-04 2016-02-04 General Electric Company Attritor
CN113731562B (en) * 2021-06-25 2022-12-06 浙江交投矿业有限公司 Wet processing technology for tuff macadam

Family Cites Families (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE378026C (en) 1923-07-04 Clemens Redeligx Milling process with step-by-step comminution of the material to be ground in the pre-grinding and fine grinding chambers arranged in a grinding housing, but separated from one another
US1504777A (en) * 1921-04-07 1924-08-12 Allis Chalmers Mfg Co Comminuting mill
US1748920A (en) * 1928-02-23 1930-02-25 Allis Chalmers Mfg Co Process of and apparatus for comminuting material
DE1507650C3 (en) * 1965-05-04 1973-10-04 F. L. Smidth & Co. A/S, Kopenhagen Grinding sludge drum
BE711701A (en) * 1968-03-05 1968-07-15
GB2038202B (en) * 1978-12-29 1982-12-01 Smidth & Co As F L Dry grinding a granular material
DE19512509B4 (en) * 1995-04-04 2009-07-30 Polysius Ag Process for comminuting ore material
US6180040B1 (en) 1998-09-02 2001-01-30 Acushnet Company Method of forming a golf ball core

Also Published As

Publication number Publication date
EP1448303A1 (en) 2004-08-25
DK1448303T3 (en) 2009-01-12
AU2002352181A1 (en) 2003-06-10
WO2003045563A1 (en) 2003-06-05
DE50212715D1 (en) 2008-10-09
US7073737B2 (en) 2006-07-11
US20050029374A1 (en) 2005-02-10

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