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EP1655074B1 - Tube mill with at least a pilot chamber and a lifting device - Google Patents

Tube mill with at least a pilot chamber and a lifting device Download PDF

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Publication number
EP1655074B1
EP1655074B1 EP05021822A EP05021822A EP1655074B1 EP 1655074 B1 EP1655074 B1 EP 1655074B1 EP 05021822 A EP05021822 A EP 05021822A EP 05021822 A EP05021822 A EP 05021822A EP 1655074 B1 EP1655074 B1 EP 1655074B1
Authority
EP
European Patent Office
Prior art keywords
chamber
openings
grinding
partition
tube mill
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.)
Not-in-force
Application number
EP05021822A
Other languages
German (de)
French (fr)
Other versions
EP1655074A2 (en
EP1655074A3 (en
Inventor
Reinhard Giesemann
Franz-Josef Zurhove
Ludwig KÖNNING
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
Polysius AG
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Publication date
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Publication of EP1655074A2 publication Critical patent/EP1655074A2/en
Publication of EP1655074A3 publication Critical patent/EP1655074A3/en
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Publication of EP1655074B1 publication Critical patent/EP1655074B1/en
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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B02—CRUSHING, PULVERISING, OR DISINTEGRATING; PREPARATORY TREATMENT OF GRAIN FOR MILLING
    • B02C—CRUSHING, PULVERISING, OR DISINTEGRATING IN GENERAL; MILLING GRAIN
    • B02C17/00—Disintegrating by tumbling mills, i.e. mills having a container charged with the material to be disintegrated with or without special disintegrating members such as pebbles or balls
    • B02C17/04—Disintegrating by tumbling mills, i.e. mills having a container charged with the material to be disintegrated with or without special disintegrating members such as pebbles or balls with unperforated container
    • B02C17/06—Disintegrating by tumbling mills, i.e. mills having a container charged with the material to be disintegrated with or without special disintegrating members such as pebbles or balls with unperforated container with several compartments
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B02—CRUSHING, PULVERISING, OR DISINTEGRATING; PREPARATORY TREATMENT OF GRAIN FOR MILLING
    • B02C—CRUSHING, PULVERISING, OR DISINTEGRATING IN GENERAL; MILLING GRAIN
    • B02C17/00—Disintegrating by tumbling mills, i.e. mills having a container charged with the material to be disintegrated with or without special disintegrating members such as pebbles or balls
    • B02C17/18—Details
    • B02C17/1825—Lifting devices
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B02—CRUSHING, PULVERISING, OR DISINTEGRATING; PREPARATORY TREATMENT OF GRAIN FOR MILLING
    • B02C—CRUSHING, PULVERISING, OR DISINTEGRATING IN GENERAL; MILLING GRAIN
    • B02C17/00—Disintegrating by tumbling mills, i.e. mills having a container charged with the material to be disintegrated with or without special disintegrating members such as pebbles or balls
    • B02C17/18—Details
    • B02C17/183—Feeding or discharging devices
    • B02C17/1835—Discharging devices combined with sorting or separating of material

Definitions

  • the invention relates to a tube mill having a first grinding chamber and a second grinding chamber and an intermediate wall arranged between the two grinding chambers, via which the grinding stock is discharged from both grinding chamber.
  • Such Mittenaustragsmühle is for example from the DE-B-378 026 known.
  • the discharged material is fed to a first separator, which sifts the material into finished product and return material, wherein the sudlaufgut is divided over a sieve into coarse and fine polllaufgut.
  • the coarse polllaufgut is together with the Frischgut the first grinding chamber and the fine polllaufgut is the second grinding chamber abandoned.
  • the GB-A-2 038 202 discloses two- and three-chamber tube mills with an intermediate wall which is delimited via sieve-like walls to the grinding chambers. In the vicinity of the sieve-like walls, stowage walls are formed in the adjoining grinding chambers, wherein in each case a lifting device is provided in the intermediate space formed in order to convey any grinding media back into the actual grinding chamber.
  • the intermediate wall also has discharge openings for the material.
  • Two-chamber tube mills are also from the FR-A1-2 332 059 and the JP-2003 220343 A known.
  • a tube mill which has two storage chambers in the intermediate wall, whose storage height can be adjusted by displaceable sheet metal segments.
  • the overflowing regrind is discharged to the bottom, while the above the MahlSystem sectionung flowing air is sucked upwards.
  • the invention is based on the object to further improve the operation of a tube mill with a center discharge.
  • At least one storage chamber for the ground material from the first or second grinding chamber is provided in the intermediate wall in order to be able to set the grinding material level in the corresponding grinding chamber.
  • a lifting device is furthermore provided in order to lift at least part of the ground material out of the stagnation chamber and to scatter it into the mill exhaust air derived from the discharge chamber.
  • the mill air is used to discharge fines from the intermediate wall.
  • the mill air is used to discharge fines from the intermediate wall.
  • a first stowage chamber for the ground material from the first grinding chamber and a second stowage chamber for the ground material from the second grinding chamber and a discharge chamber having the discharge chamber are provided in the intermediate wall, wherein the storage chambers are connected via openings with the discharge chamber.
  • the Storage chambers ensure a constant grinding material level in the associated grinding chambers.
  • the openings of at least one of the two storage chambers are formed as overflow openings, which are adjustable in height. In this way, the grinding material level in the corresponding chamber can be optimally adapted to the respective conditions.
  • Tube mill 1 shown essentially consists of a first grinding chamber 2, a second grinding chamber 3 and an intermediate wall 4 arranged between the two grinding chambers.
  • the intermediate wall in turn consists of a facing the first grinding chamber 2 front 5, which is provided with inlet openings 5a through which the material to be ground first grinding chamber passes into the intermediate wall and facing the second grinding chamber back 6, which is provided with inlet openings 6a, passes through the grinding material of the second grinding chamber in the intermediate wall. Furthermore, outlet openings 7 are provided, via which the ground material located in the intermediate wall is discharged.
  • the intermediate wall is subdivided into a first stowage chamber 8 for the ground material from the first grinding chamber 2, a second stowage chamber 9 for the ground material from the second grinding chamber 3 and a discharge chamber 10 having the discharge openings 7.
  • the first stowage chamber 8 is delimited by the front side 5 and a first stowage wall 11 and a first outer tube section 1a of the intermediate wall and the second stowage chamber 9 through the back 6 and a second stowage wall 12 and an outer tube section 1b of the intermediate wall.
  • the storage chambers 8, 9 are connected via openings 11a, 12a in the first and second storage wall with the discharge chamber 10 in connection.
  • a partial segment of the first stowage wall 11 is shown, wherein the stowage wall is composed of a plurality of such segments.
  • the opening 11a is formed as an overflow opening, the height of which is adjustable by displacement (see double arrow 14) of a plate 13.
  • the upper edge 13a of the plate 13 defines the level in the first storage chamber 8, whereby the Mahlgutapt in the second grinding chamber 2 can not fall below this level.
  • the second storage chamber 9 is constructed similar to the first storage chamber.
  • the opening 12a is in turn designed as an overflow opening, which is designed to be adjustable in height by means of a plate 15.
  • the upper edge 15a of the plate 15 defines the level in the second Jam chamber 9, whereby the Mahlgutapt in the second grinding chamber 3 can not fall below this level.
  • the front 5 and the back 6 have central openings 5b, 6b for the inflow of mill air (arrows 19a, 19b) from the two grinding chambers 2, 3.
  • the openings for discharging the mill exhaust air are in turn formed by the discharge openings 7, wherein a plurality of these discharge openings 7 are arranged over the circumference of a located between the first pipe section 1 a and the second pipe section 1 b third pipe section 1 c.
  • a lifting device 17 is provided to lift at least a portion of the ground material out of the second stowage chamber 9 and preferably to sprinkle it above the longitudinal central axis 1d into the mill air to be discharged from the discharge chamber.
  • the lifting device 17 is preferably made in the illustrated embodiment of radially arranged litter elements 17a, at the radially inner ends of a spray plate 17b is attached.
  • the material to be ground (arrows 18a) from the first grinding chamber 2 passes via the inlet openings 5a of the front side 5 into the first storage chamber 8 where the material accumulates up to the upper edge 13a of the plate 13. All further material leaves the first stowage chamber via the opening 11a of the stowage wall 11 (see arrow 18c). The discharged material is discharged by gravity following the discharge openings 7 down from the intermediate wall (arrow 18g).
  • the material to be ground (arrows 18b) of the second grinding chamber 3 passes via the inlet openings 6a of the back 6 into the second storage chamber 9.
  • the material to be ground in the second storage chamber can leave it, for example, via the opening 12a (see arrow 18f) and becomes together with the product the first stowage chamber down over the discharge openings 7 discharged.
  • a second possibility is that the material to be ground is lifted by the lifting device 17, so that the material to be ground slips onto the injection plates 17b as a result of the rotation of the tube mill on the bedding elements 17a according to the arrows 18d and from there into those of the first and second grinding chambers incoming mill air (arrows 19a, 19b) is sprinkled evenly. Heavy particles fall down and are discharged together with the other material from the first and second storage chamber down (arrow 18g), while the finer components are discharged with the mill exhaust air (arrow 19c) upwards.
  • a grinding plant is shown schematically, which essentially comprises the following components: a tube mill 1, as described above with reference to Fig. 1 to Fig. 3
  • the grind such as clinker and gypsum is initially in the reservoirs 23 and is withdrawn dosed via appropriate scales and fed via a conveyor 24 to the static classifier 20 ,
  • the coarse material of the static classifier 20 enters the first grinding chamber 2 of the tube mill 1, while the fine material is supplied to the dynamic classifier together with the mill exhaust air.
  • the coarse material of the dynamic separator is fed to the entrance of the second grinding chamber 3 and the fines pass into the separator 22, where the fines 26 are separated from the air. Subsequently, a partial stream 25 of the air to the static separator and the rest of an exhaust chimney 27 is supplied.
  • the tube mill 1 is surrounded in the region of the intermediate wall by a stationary discharge housing 28, which has a lower outlet 28a for the ground material discharged by gravity and an upper outlet 28b for the mill exhaust air laden with the fine material.
  • the output 28b is in communication with the dynamic classifier 21.
  • the static classifier 20 can be relieved.
  • Fig. 5 shows a second embodiment of a tube mill 1, which differs from the first embodiment according to Fig. 1 differs in that only one stowage chamber, namely the first stowage chamber 8 is present.
  • only the grinding material level in the first grinding chamber 2 can be adjusted by adjusting the plate 13 of the blocking wall 11. After no lifting device is present, the fines discharge together with the mill exhaust air (arrow 19c) is relatively low.
  • a lifting device 17 is provided independently of the presence of a second storage chamber 9.
  • the Mahlgutspiegel By being able to adjust the Mahlgutspiegel at least in one of the two grinding chambers, in particular the first grinding chamber, the Mahlgutspiegel can be optimally adapted to the respective conditions. As a result, the efficiency of the mill can be increased with a center discharge. If, in addition, part of the fine material is discharged with the mill exhaust air and fed directly to the dynamic classifier, the static classifier can also be correspondingly relieved.

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  • Engineering & Computer Science (AREA)
  • Food Science & Technology (AREA)
  • Crushing And Grinding (AREA)
  • Control Of Motors That Do Not Use Commutators (AREA)
  • Organic Low-Molecular-Weight Compounds And Preparation Thereof (AREA)
  • Earth Drilling (AREA)

Abstract

The tube mill (1) has a face (5), pointing to the first meal chamber (2), with entrance opening (5a) over the grinding stock of the first meal chamber in the partition wall. A lifting device (17) is provided in the pilot chamber (9) in order to raise and intersperse a part of grinding stock from the pilot chamber into the exhaust air derived from the discharge chamber (10).

Description

Die Erfindung betrifft eine Rohrmühle mit einer ersten Mahlkammer und einer zweiten Mahlkammer sowie einer zwischen den beiden Mahlkammern angeordneten Zwischenwand, über die das Mahlgut aus beiden Mahlkammer ausgetragen wird.The invention relates to a tube mill having a first grinding chamber and a second grinding chamber and an intermediate wall arranged between the two grinding chambers, via which the grinding stock is discharged from both grinding chamber.

Eine derartige Mittenaustragsmühle ist beispielsweise aus der DE-B-378 026 bekannt. Das ausgetragene Gut wird einem ersten Sichter zugeführt, der das Gut in Fertiggut und Rücklaufgut sichtet, wobei das Rücklaufgut über ein Sieb in grobes und feines Rücklaufgut aufgeteilt wird. Das grobe Rücklaufgut wird zusammen mit dem Frischgut der ersten Mahlkammer und das feine Rücklaufgut wird der zweiten Mahlkammer aufgegeben.Such Mittenaustragsmühle is for example from the DE-B-378 026 known. The discharged material is fed to a first separator, which sifts the material into finished product and return material, wherein the Rücklaufgut is divided over a sieve into coarse and fine Rücklaufgut. The coarse Rücklaufgut is together with the Frischgut the first grinding chamber and the fine Rücklaufgut is the second grinding chamber abandoned.

Die GB-A-2 038 202 offenbart Zwei- und Dreikammerrohrmühlen mit einer Zwischenwand, die über siebartige Wände zu den Mahlkammern abgegrenzt ist. In der Nähe der siebartigen Wände sind in den angrenzenden Mahlkammern Stauwände ausgebildet, wobei in dem dadurch gebildeten Zwischenraum jeweils eine Hebeeinrichtung vorgesehen ist, um etwaige Mahlkörper zurück in die eigentliche Mahlkammer zu fördern. Die Zwischenwand weist ferner Austragsöffnungen für das Material auf.The GB-A-2 038 202 discloses two- and three-chamber tube mills with an intermediate wall which is delimited via sieve-like walls to the grinding chambers. In the vicinity of the sieve-like walls, stowage walls are formed in the adjoining grinding chambers, wherein in each case a lifting device is provided in the intermediate space formed in order to convey any grinding media back into the actual grinding chamber. The intermediate wall also has discharge openings for the material.

Zweikammer-Rohrmühlen sind außerdem aus der FR-A1-2 332 059 und der JP-2003 220343 A bekannt.Two-chamber tube mills are also from the FR-A1-2 332 059 and the JP-2003 220343 A known.

Aus der DE-C-25 38 431 ist ferner eine Rohrmühle bekannt, die in der Zwischenwand zwei Staukammern aufweist, deren Stauhöhe durch verschiebbare Blechsegmente eingestellt werden kann. Das überlaufende Mahlgut wird nach untern abgeführt, während die oberhalb der Mahlkörperschüttung strömende Luft nach oben abgesaugt wird.From the DE-C-25 38 431 Furthermore, a tube mill is known, which has two storage chambers in the intermediate wall, whose storage height can be adjusted by displaceable sheet metal segments. The overflowing regrind is discharged to the bottom, while the above the Mahlkörperschüttung flowing air is sucked upwards.

Der Erfindung liegt nun die Aufgabe zugrunde, die Betriebsweise einer Rohrmühle mit einem Mittenaustrag weiter zu verbessern.The invention is based on the object to further improve the operation of a tube mill with a center discharge.

Erfindungsgemäß wird diese Aufgabe durch die Merkmale des Anspruches 1 gelöst.According to the invention, this object is solved by the features of claim 1.

Die erfindungsgemäße Rohrmühle besteht im wesentlichen aus einer ersten Mahlkammer, einer zweiten Mahlkammer, sowie einer zwischen den beiden Mahlkammern angeordneten Zwischenwand mit

  • einer zur ersten Mahlkammer weisenden Vorderseite, die mit Eintrittsöffnungen versehen ist, über die das Mahlgut der ersten Mahlkammer in die Zwischenwand gelangt,
  • einer zur zweiten Mahlkammer weisenden Rückseite, die mit Eintrittsöffnungen versehen ist, über die das Mahlgut der zweiten Mahlkammer in die Zwischenwand gelangt,
  • sowie Austragsöffnungen, über die das in der Zwischenwand befindliche Mahlgut ausgetragen wird.
The tube mill according to the invention essentially consists of a first grinding chamber, a second grinding chamber, and an intermediate wall arranged between the two grinding chambers
  • a facing the first grinding chamber front, which is provided with inlet openings through which passes the ground material of the first grinding chamber in the intermediate wall,
  • a rear side facing the second grinding chamber, which is provided with inlet openings, via which the grinding stock of the second grinding chamber enters the intermediate wall,
  • as well as discharge openings, over which the ground material located in the intermediate wall is discharged.

In der Zwischenwand ist ferner wenigstens eine Staukammer für das Mahlgut aus der ersten oder zweiten Mahlkammer vorgesehen, um den Mahlgutspiegel in der entsprechenden Mahlkammer einstellen zu können. In der Staukammer ist weiterhin eine Hebeeinrichtung vorgesehen ist, um zumindest einen Teil des Mahlguts aus der Staukammer anzuheben und in die aus der Austragskammer abgeleitete Mühlenabluft einzustreuen.Furthermore, at least one storage chamber for the ground material from the first or second grinding chamber is provided in the intermediate wall in order to be able to set the grinding material level in the corresponding grinding chamber. In the stowage chamber, a lifting device is furthermore provided in order to lift at least part of the ground material out of the stagnation chamber and to scatter it into the mill exhaust air derived from the discharge chamber.

Die Mühlenluft wird dabei zum Austrag von Feingut aus der Zwischenwand genutzt. Durch das Einstreuen des Mahlguts in die abgeleitete Mühlenluft findet bereits in der Zwischenwand eine Vorsichtung des Mahlgutes statt, so dass nachfolgende Sichter entlastet werden.The mill air is used to discharge fines from the intermediate wall. By sprinkling the ground material in the derived mill air already takes place in the intermediate wall precaution of the ground material, so that subsequent classifiers are relieved.

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

Die Staukammer wird vorzugsweise durch die Vorderseite bzw. Rückseite der Zwischenwand und eine Stauwand sowie einen äußeren Rohrabschnitt der Zwischenwand begrenzt.The stowage chamber is preferably delimited by the front or rear side of the intermediate wall and a stowage wall and an outer tube section of the intermediate wall.

Gemäß einem bevorzugten Ausführungsbeispiel sind in der Zwischenwand eine erste Staukammer für das Mahlgut aus der ersten Mahlkammer und eine zweite Staukammer für das Mahlgut aus der zweiten Mahlkammer sowie eine die Austragsöffnungen aufweisende Austragskammer vorgesehen, wobei die Staukammern über Öffnungen mit der Austragkammer in Verbindung stehen. Die Staukammern gewährleisten einen konstanten Mahlgutspiegel in den zugehörigen Mahlkammern.According to a preferred embodiment, a first stowage chamber for the ground material from the first grinding chamber and a second stowage chamber for the ground material from the second grinding chamber and a discharge chamber having the discharge chamber are provided in the intermediate wall, wherein the storage chambers are connected via openings with the discharge chamber. The Storage chambers ensure a constant grinding material level in the associated grinding chambers.

Gemäß einer besonderen Ausgestaltung der Erfindung sind die Öffnungen wenigstens einer der beiden Staukammern als Überlauföffnungen ausgebildet, die in ihrer Höhe einstellbar sind. Auf diese Weise kann der Mahlgutspiegel in der entsprechenden Kammer an die jeweiligen Verhältnisse optimal angepasst werden.According to a particular embodiment of the invention, the openings of at least one of the two storage chambers are formed as overflow openings, which are adjustable in height. In this way, the grinding material level in the corresponding chamber can be optimally adapted to the respective conditions.

Weitere Vorteile und Ausgestaltungen der Erfindung werden nachfolgend anhand der Beschreibung und der Zeichnung näher erläutert.Further advantages and embodiments of the invention will be explained in more detail with reference to the description and the drawing.

In der Zeichnung zeigen

Fig. 1
eine geschnittene Teilansicht der Rohrmühle im Bereich der Zwischenwand gemäß einem ersten Ausführungsbeispiel,
Fig. 2
eine Seitenansicht gemäß Ansicht A der Fig. 1,
Fig. 3
eine Seitenansicht gemäß Ansicht B der Fig. 1,
Fig. 4
eine schematische Gesamtdarstellung einer Mahlanlage und
Fig. 5
eine geschnittene Teilansicht der Rohrmühle im Bereich der Zwischenwand gemäß einem zweiten Ausführungsbeispiel.
In the drawing show
Fig. 1
2 is a partial sectional view of the tube mill in the region of the intermediate wall according to a first exemplary embodiment,
Fig. 2
a side view according to view A of Fig. 1 .
Fig. 3
a side view according to view B of Fig. 1 .
Fig. 4
a schematic overall view of a grinding plant and
Fig. 5
a sectional partial view of the tube mill in the region of the intermediate wall according to a second embodiment.

Die in Fig. 1 dargestellte Rohrmühle 1 besteht im wesentlichen aus einer ersten Mahlkammer 2, einer zweiten Mahlkammer 3 sowie einer zwischen den beiden Mahlkammern angeordneten Zwischenwand 4.In the Fig. 1 Tube mill 1 shown essentially consists of a first grinding chamber 2, a second grinding chamber 3 and an intermediate wall 4 arranged between the two grinding chambers.

Die Zwischenwand besteht wiederum aus einer zur ersten Mahlkammer 2 weisenden Vorderseite 5, die mit Eintrittsöffnungen 5a versehen ist, über die das Mahlgut der ersten Mahlkammer in die Zwischenwand gelangt und einer zur zweiten Mahlkammer weisenden Rückseite 6, die mit Eintrittsöffnungen 6a versehen ist, über die das Mahlgut der zweiten Mahlkammer in die Zwischenwand gelangt. Ferner sind Austrittsöffnungen 7 vorgesehen, über die das in der Zwischenwand befindliche Mahlgut ausgetragen wird.The intermediate wall in turn consists of a facing the first grinding chamber 2 front 5, which is provided with inlet openings 5a through which the material to be ground first grinding chamber passes into the intermediate wall and facing the second grinding chamber back 6, which is provided with inlet openings 6a, passes through the grinding material of the second grinding chamber in the intermediate wall. Furthermore, outlet openings 7 are provided, via which the ground material located in the intermediate wall is discharged.

Die Zwischenwand ist in eine erste Staukammer 8 für das Mahlgut aus der ersten Mahlkammer 2, eine zweite Staukammer 9 für das Mahlgut aus der zweiten Mahlkammer 3 und eine die Austragsöffnungen 7 aufweisende Austragskammer 10 unterteilt.The intermediate wall is subdivided into a first stowage chamber 8 for the ground material from the first grinding chamber 2, a second stowage chamber 9 for the ground material from the second grinding chamber 3 and a discharge chamber 10 having the discharge openings 7.

Die erste Staukammer 8 wird durch die Vorderseite 5 und eine erste Stauwand 11 sowie einen ersten äußeren Rohrabschnitt 1a der Zwischenwand und die zweite Staukammer 9 durch die Rückseite 6 und eine zweite Stauwand 12 sowie einen äußeren Rohrabschnitt 1b der Zwischenwand begrenzt. Die Staukammern 8, 9 stehen über Öffnungen 11a, 12a in der ersten bzw. zweiten Stauwand mit der Austragskammer 10 in Verbindung.The first stowage chamber 8 is delimited by the front side 5 and a first stowage wall 11 and a first outer tube section 1a of the intermediate wall and the second stowage chamber 9 through the back 6 and a second stowage wall 12 and an outer tube section 1b of the intermediate wall. The storage chambers 8, 9 are connected via openings 11a, 12a in the first and second storage wall with the discharge chamber 10 in connection.

In Fig. 2 ist ein Teilsegment der ersten Stauwand 11 dargestellt, wobei sich die Stauwand aus einer Vielzahl derartiger Segmente zusammensetzt. Die Öffnung 11a ist als Überlauföffnung ausgebildet, deren Höhe durch Verschiebung (siehe Doppelpfeil 14) einer Platte 13 einstellbar ist. Die Oberkante 13a der Platte 13 definiert den Füllstand in der ersten Staukammer 8, wodurch auch der Mahlgutspiegel in der zweiten Mahlkammer 2 nicht unterhalb dieses Pegels absinken kann.In Fig. 2 a partial segment of the first stowage wall 11 is shown, wherein the stowage wall is composed of a plurality of such segments. The opening 11a is formed as an overflow opening, the height of which is adjustable by displacement (see double arrow 14) of a plate 13. The upper edge 13a of the plate 13 defines the level in the first storage chamber 8, whereby the Mahlgutspiegel in the second grinding chamber 2 can not fall below this level.

Die zweite Staukammer 9 ist ähnlich wie die erste Staukammer aufgebaut. In der Teilansicht gemäß Fig. 3 ist zu erkennen, dass die Öffnung 12a wiederum als Überlauföffnung ausgebildet ist, die in ihrer Höhe mittels einer Platte 15 einstellbar gestaltet ist. Die Oberkante 15a der Platte 15 definiert den Füllstand in der zweiten Staukammer 9, wodurch auch der Mahlgutspiegel in der zweiten Mahlkammer 3 nicht unterhalb dieses Pegels absinken kann.The second storage chamber 9 is constructed similar to the first storage chamber. In the partial view according to Fig. 3 It can be seen that the opening 12a is in turn designed as an overflow opening, which is designed to be adjustable in height by means of a plate 15. The upper edge 15a of the plate 15 defines the level in the second Jam chamber 9, whereby the Mahlgutspiegel in the second grinding chamber 3 can not fall below this level.

Die Vorderseite 5 und die Rückseite 6 weisen zentrale Öffnungen 5b, 6b zum Einströmen von Mühlenluft (Pfeile 19a, 19b) aus den beiden Mahlkammern 2, 3 auf. Die Öffnungen zum Ableiten der Mühlenabluft werden wiederum durch die Austragsöffnungen 7 gebildet, wobei einer Vielzahl dieser Austragsöffnungen 7 über den Umfang eines zwischen dem ersten Rohrabschnitt 1a und dem zweiten Rohrabschnitt 1b gelegenen dritten Rohrabschnitts 1c angeordnet sind. Je nach Drehstellung der Rohrmühle befindet sich ein Teil der Austragsöffnungen 7 im unteren Bereich und dient zum Austrag des Mahlgutes (Pfeil 18g) während über ein Teil der Austragsöffnungen im oberen Bereich im wesentlichen die Mühlenabluft (Pfeil 19c) abgeleitet wird.The front 5 and the back 6 have central openings 5b, 6b for the inflow of mill air (arrows 19a, 19b) from the two grinding chambers 2, 3. The openings for discharging the mill exhaust air are in turn formed by the discharge openings 7, wherein a plurality of these discharge openings 7 are arranged over the circumference of a located between the first pipe section 1 a and the second pipe section 1 b third pipe section 1 c. Depending on the rotational position of the tube mill is a part of the discharge openings 7 in the lower region and is used to discharge the ground material (arrow 18g) while a part of the discharge openings in the upper region substantially the mill exhaust air (arrow 19c) is derived.

In der zweiten Staukammer ist eine Hebeeinrichtung 17 vorgesehen, um zumindest einen Teil des Mahlguts aus der zweiten Staukammer 9 anzuheben und vorzugsweise oberhalb der Längsmittelachse 1d in die aus der Austragskammer abzuleitenden Mühlenluft einzustreuen. Die Hebeeinrichtung 17 besteht im dargestellten Ausführungsbeispiel vorzugsweise aus radial angeordneten Einstreuelementen 17a, an deren radial inneren Enden eine Spritzplatte 17b befestigt ist.In the second stowage chamber, a lifting device 17 is provided to lift at least a portion of the ground material out of the second stowage chamber 9 and preferably to sprinkle it above the longitudinal central axis 1d into the mill air to be discharged from the discharge chamber. The lifting device 17 is preferably made in the illustrated embodiment of radially arranged litter elements 17a, at the radially inner ends of a spray plate 17b is attached.

Im folgenden wird die Betriebsweise der oben beschriebenen Rohrmühle näher erläutert.In the following, the operation of the tube mill described above will be explained in more detail.

Das Mahlgut (Pfeile 18a) aus der ersten Mahlkammer 2 gelangt über die Eintrittsöffnungen 5a der Vorderseite 5 in die erste Staukammer 8. wo sich das Material bis zur Oberkante 13a der Platte 13 anstaut. Alles weitere Material verlässt die erste Staukammer über die Öffnung 11a der Stauwand 11 (siehe Pfeil 18c). Das ausgetragene Material wird der Schwerkraft folgend über die Austragsöffnungen 7 nach unten aus der Zwischenwand ausgetragen (Pfeil 18g).The material to be ground (arrows 18a) from the first grinding chamber 2 passes via the inlet openings 5a of the front side 5 into the first storage chamber 8 where the material accumulates up to the upper edge 13a of the plate 13. All further material leaves the first stowage chamber via the opening 11a of the stowage wall 11 (see arrow 18c). The discharged material is discharged by gravity following the discharge openings 7 down from the intermediate wall (arrow 18g).

Gleichzeitig gelangt das Mahlgut (Pfeile 18b) der zweiten Mahlkammer 3 über die Eintrittsöffnungen 6a der Rückseite 6 in die zweite Staukammer 9. Das Mahlgut der zweiten Staukammer kann diese beispielsweise über die Öffnung 12a verlassen (siehe Pfeil 18f) und wird zusammen mit dem Gut aus der ersten Staukammer nach unten über die Austragsöffnungen 7 ausgetragen.At the same time, the material to be ground (arrows 18b) of the second grinding chamber 3 passes via the inlet openings 6a of the back 6 into the second storage chamber 9. The material to be ground in the second storage chamber can leave it, for example, via the opening 12a (see arrow 18f) and becomes together with the product the first stowage chamber down over the discharge openings 7 discharged.

Eine zweite Möglichkeit besteht darin, dass das Mahlgut durch die Hebeeinrichtung 17 angehoben wird, so dass das Mahlgut im Folge der Rotation der Rohrmühle auf den Einstreuelementen 17a gemäß dem Pfeilen 18d auf die Spritzplatten 17b rutscht und von dort in die von der ersten und zweiten Mahlkammer kommende Mühlenluft (Pfeile 19a, 19b) gleichmäßig eingestreut wird. Schwere Partikel fallen dabei nach unten aus und werden zusammen mit dem anderen Material aus der ersten und zweiten Staukammer nach unten ausgetragen (Pfeil 18g), während die feineren Bestandteile mit der Mühlenabluft (Pfeil 19c) nach oben ausgetragen werden.A second possibility is that the material to be ground is lifted by the lifting device 17, so that the material to be ground slips onto the injection plates 17b as a result of the rotation of the tube mill on the bedding elements 17a according to the arrows 18d and from there into those of the first and second grinding chambers incoming mill air (arrows 19a, 19b) is sprinkled evenly. Heavy particles fall down and are discharged together with the other material from the first and second storage chamber down (arrow 18g), while the finer components are discharged with the mill exhaust air (arrow 19c) upwards.

In Fig. 4 ist eine Mahlanlage schematisch dargestellt, die im wesentlichen folgende Bestandteile umfasst: eine Rohrmühle 1, wie sie oben anhand der Fig. 1 bis Fig. 3 beschrieben wurde, einen statischen Sichter 20, einen dynamischen Sichter 21 einen Abscheider 22 sowie Vorratsbehälter 23. Das Mahlgut, beispielsweise Klinker und Gips befindet sich zunächst in den Vorratsbehältern 23 und wird über entsprechende Waagen dosiert abgezogen und über eine Fördereinrichtung 24 dem statischen Sichter 20 zugeführt. Das grobe Gut des statischen Sichters 20 gelangt in die erste Mahlkammer 2 der Rohrmühle 1, während das Feingut zusammen mit der Mühlenabluft dem dynamischen Sichter zugeführt wird.In Fig. 4 a grinding plant is shown schematically, which essentially comprises the following components: a tube mill 1, as described above with reference to Fig. 1 to Fig. 3 The grind, such as clinker and gypsum is initially in the reservoirs 23 and is withdrawn dosed via appropriate scales and fed via a conveyor 24 to the static classifier 20 , The coarse material of the static classifier 20 enters the first grinding chamber 2 of the tube mill 1, while the fine material is supplied to the dynamic classifier together with the mill exhaust air.

Das Grobgut des dynamischen Sichters wird dem Eingang der zweiten Mahlkammer 3 zugeführt und das Feingut gelangt in den Abscheider 22, wo das Feingut 26 von der Luft getrennt wird. Anschließend wird ein Teilstrom 25 der Luft dem statischen Sichter und der Rest einem Abluftkamin 27 zugeführt.The coarse material of the dynamic separator is fed to the entrance of the second grinding chamber 3 and the fines pass into the separator 22, where the fines 26 are separated from the air. Subsequently, a partial stream 25 of the air to the static separator and the rest of an exhaust chimney 27 is supplied.

Die Rohrmühle 1 ist im Bereich der Zwischenwand von einem stationären Austragsgehäuse 28 umgeben, welches einen unteren Ausgang 28a für das durch die Schwerkraft ausgetragene Mahlgut und einen oberen Ausgang 28b für die mit dem Feingut beladene Mühlenabluft aufweist. Der Ausgang 28b ist mit dem dynamischen Sichter 21 in Verbindung.The tube mill 1 is surrounded in the region of the intermediate wall by a stationary discharge housing 28, which has a lower outlet 28a for the ground material discharged by gravity and an upper outlet 28b for the mill exhaust air laden with the fine material. The output 28b is in communication with the dynamic classifier 21.

Indem wenigstens ein Teil des Feingutes zusammen mit der Mühlenabluft direkt dem dynamischen Sichter 21 zugeführt wird, kann der statische Sichter 20 entlastet werden.By at least a portion of the fines together with the mill exhaust air is supplied directly to the dynamic classifier 21, the static classifier 20 can be relieved.

Fig. 5 zeigt nun ein zweites Ausführungsbeispiel für eine Rohrmühle 1, die sich vom ersten Ausführungsbeispiel gemäß Fig. 1 dadurch unterscheidet, dass lediglich eine Staukammer, nämlich die erste Staukammer 8 vorhanden ist. Bei dieser Variante lässt sich somit lediglich der Mahlgutspiegel in der ersten Mahlkammer 2 durch Verstellung der Platte 13 der Stauwand 11 einstellen. Nachdem auch keine Hebeeinrichtung vorhanden ist, ist der Feingutaustrag zusammen mit der Mühlenabluft (Pfeil 19c) relativ gering. Fig. 5 shows a second embodiment of a tube mill 1, which differs from the first embodiment according to Fig. 1 differs in that only one stowage chamber, namely the first stowage chamber 8 is present. In this variant, therefore, only the grinding material level in the first grinding chamber 2 can be adjusted by adjusting the plate 13 of the blocking wall 11. After no lifting device is present, the fines discharge together with the mill exhaust air (arrow 19c) is relatively low.

Im Rahmen der Erfindung ist es jedoch denkbar, dass auch in dem Ausführungsbeispiel gemäß Fig. 5 eine Hebeeinrichtung 17 unabhängig vom Vorhandensein einer zweiten Staukammer 9 vorgesehen wird.In the context of the invention, however, it is conceivable that also in the embodiment according to Fig. 5 a lifting device 17 is provided independently of the presence of a second storage chamber 9.

Durch die Möglichkeit, den Mahlgutspiegel zumindest in einer der beiden Mahlkammern, insbesondere der ersten Mahlkammer einstellen zu können, kann der Mahlgutspiegel an die jeweiligen Verhältnisse optimal angepasst werden. Dadurch kann der Wirkungsgrad der Mühle mit einem Mittenaustrag gesteigert werden. Wird zudem ein Teil des Feingutes mit der Mühlenabluft ausgetragen und direkt dem dynamischen Sichter zugeführt, kann zudem der statische Sichter entsprechend entlastet werden.By being able to adjust the Mahlgutspiegel at least in one of the two grinding chambers, in particular the first grinding chamber, the Mahlgutspiegel can be optimally adapted to the respective conditions. As a result, the efficiency of the mill can be increased with a center discharge. If, in addition, part of the fine material is discharged with the mill exhaust air and fed directly to the dynamic classifier, the static classifier can also be correspondingly relieved.

Claims (10)

  1. A tube mill (1) with
    - a first grinding chamber (2),
    - a second grinding chamber (3)
    - and a partition arranged between the two grinding chambers and having
    - a front surface (5) facing the first grinding chamber and provided with inlet openings (5a), via which the ground material from the first grinding chamber passes into the partition,
    - a rear surface (6) facing the second grinding chamber and provided with inlet openings (6a), via which the ground material from the second grinding chamber passes into the partition,
    - discharge openings (7), via which the ground material contained in the partition is discharged,
    - at least one collecting chamber (8, 9) for the ground material from the first or second grinding chamber (2, 3) in order to be able to adjust the level of ground material in the corresponding grinding chamber,
    characterised in that a lifting device (17) is provided in the collecting chamber (9) in order to lift at least some of the ground material out of the collecting chamber and disperse it into the mill exhaust air drawn off from the discharge chamber (10).
  2. A tube mill according to claim 1, characterised in that the collecting chamber (8, 9) is defined by the front surface (5) or the rear surface (6) and a retaining wall (11, 12), and an outer tube portion (1a, 1b) of the partition.
  3. A tube mill according to claim 1, characterised in that a first collecting chamber (8) for the ground material from the first grinding chamber (2) and a second collecting chamber (9) for the ground material from the second grinding chamber (3) and a discharge chamber (10) having the discharge openings are provided in the partition, wherein the collecting chambers communicate with the discharge chamber (10) via openings (11a, 12a).
  4. A tube mill according to claim 1, characterised in that the first collecting chamber (8) is defined by the front surface (5) and a first retaining wall (11) and a first outer tube portion (1a) of the partition, and the second collecting chamber (9) is defined by the rear surface (6) and a second retaining wall (12) and a second outer tube portion (1b) of the partition.
  5. A tube mill according to claim 1, characterised in that the front surface (5) and the rear surface (6) have openings for the inflow of mill air from the two grinding chambers, and openings (7) are provided in the partition for drawing off the mill exhaust air (19c).
  6. A tube mill according to claim 1, characterised in that means are provided in the partition (4) in order to discharge at least a fine-material component of the ground material separately from the remainder of the ground material.
  7. A tube mill according to claim 1, characterised in that the openings (11a, 12a) of at least one of the two collecting chambers (8, 9) are formed as overflow openings.
  8. A tube mill according to claim 1, characterised in that the openings (11a, 12a) of at least one of the two collecting chambers (8, 9) are formed as overflow openings, the height of which is adjustable.
  9. A tube mill according to claim 1, characterised in that the openings (11a, 12a) of at least one of the two collecting chambers (8, 9) are formed as overflow openings which interact with displaceable plates (13, 15) in such a way that the height of the overflow openings is adjustable by displacement of the plates.
  10. A tube mill according to claim 1, characterised in that the tube mill (1) is surrounded by a stationary discharge housing (28) in the region of the partition (4).
EP05021822A 2004-11-09 2005-10-06 Tube mill with at least a pilot chamber and a lifting device Not-in-force EP1655074B1 (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE102004054088A DE102004054088A1 (en) 2004-11-09 2004-11-09 tube mill

Publications (3)

Publication Number Publication Date
EP1655074A2 EP1655074A2 (en) 2006-05-10
EP1655074A3 EP1655074A3 (en) 2007-04-04
EP1655074B1 true EP1655074B1 (en) 2008-06-04

Family

ID=35681437

Family Applications (1)

Application Number Title Priority Date Filing Date
EP05021822A Not-in-force EP1655074B1 (en) 2004-11-09 2005-10-06 Tube mill with at least a pilot chamber and a lifting device

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EP (1) EP1655074B1 (en)
AT (1) ATE397494T1 (en)
DE (2) DE102004054088A1 (en)
DK (1) DK1655074T3 (en)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN105289803B (en) * 2015-10-28 2018-06-26 云南清朗能源科技有限公司 A kind of anti-windrow ball mill and anti-windrow method

Family Cites Families (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE566935C (en) * 1932-12-28 Heinrich Rueckert Composite pipe mill
DE294543C (en) *
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
DE2538431C2 (en) * 1975-08-29 1983-04-07 Fa. Christian Pfeiffer, 4720 Beckum Outlet wall for tube mills
GB1478426A (en) * 1975-11-20 1977-06-29 Smidth & Co As F L Tube mills for drying and grinding
GB1481260A (en) * 1975-12-29 1977-07-27 Smidth & Co As F L Ventilated tube mills
DE2808011A1 (en) * 1977-02-25 1978-08-31 Pierre Slegten DEVICE AND METHOD FOR CONTROLLING THE QUANTITY OF REGRIND IN A GRINDING CHAMBER OF A BALL TUBE MILL
GB2038202B (en) * 1978-12-29 1982-12-01 Smidth & Co As F L Dry grinding a granular material
DE10127258A1 (en) * 2001-06-05 2002-12-12 Krupp Polysius Ag Tube mill has grist outlets located in a circular arrangement around the air outlet
DE10129748A1 (en) * 2001-06-20 2003-01-23 Kloeckner Humboldt Wedag Adjustable discharge wall for discharging the ground material from a tube mill
JP2003220343A (en) * 2002-01-30 2003-08-05 Kurimoto Shoji Kk Wet ball mill

Also Published As

Publication number Publication date
EP1655074A2 (en) 2006-05-10
ATE397494T1 (en) 2008-06-15
DE102004054088A1 (en) 2006-05-11
DE502005004332D1 (en) 2008-07-17
DK1655074T3 (en) 2008-10-13
EP1655074A3 (en) 2007-04-04

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