EP1850962A1 - Milling station and method for grinding milling material - Google Patents

Milling station and method for grinding milling material

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Publication number
EP1850962A1
EP1850962A1 EP06706945A EP06706945A EP1850962A1 EP 1850962 A1 EP1850962 A1 EP 1850962A1 EP 06706945 A EP06706945 A EP 06706945A EP 06706945 A EP06706945 A EP 06706945A EP 1850962 A1 EP1850962 A1 EP 1850962A1
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EP
European Patent Office
Prior art keywords
grinding
classifier
divider
chambers
feinmahlkreis
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.)
Granted
Application number
EP06706945A
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German (de)
French (fr)
Other versions
EP1850962B1 (en
Inventor
Ludger Schulte
Franz-Josef Zurhove
Donald A. Longhurst
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
Application filed by Polysius AG filed Critical Polysius AG
Publication of EP1850962A1 publication Critical patent/EP1850962A1/en
Application granted granted Critical
Publication of EP1850962B1 publication Critical patent/EP1850962B1/en
Expired - Fee Related legal-status Critical Current
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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B02—CRUSHING, PULVERISING, OR DISINTEGRATING; PREPARATORY TREATMENT OF GRAIN FOR MILLING
    • B02C—CRUSHING, PULVERISING, OR DISINTEGRATING IN GENERAL; MILLING GRAIN
    • B02C21/00—Disintegrating plant with or without drying of the material
    • B02C21/002—Disintegrating plant with or without drying of the material using a combination of a roller mill and a drum mill
    • 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

Definitions

  • the invention relates to a grinding plant and a method for grinding regrind with at least one coarse grinding circle and at least one fine grinding circle.
  • a crusherumlauf of at least 1.8 to 2.0 strive to achieve sufficiently low residue levels in the finished product.
  • the diameter of the mill can not be increased arbitrarily, since the number of spherical layers in fine-grained Combi mills becomes too large. So there is a slip between each layer, so that hardly any relative movement of the balls takes place in the inner core of the ball bed. In this area, therefore, no grinding takes place.
  • the ball mill is used for the effective deagglomeration of the goods of a good bed roller mill.
  • the invention is an object of the invention to provide a grinding plant, which is characterized by very high throughput. According to the invention this object is solved by the features of claims 1 and 9.
  • the grinding plant according to the invention consists essentially of a Grobmahl Vietnamese and at least one Feinmahl Vietnamese, the Grobmahl Vietnamese has a classifier and a Goodbettwalzenmühle and passes the pre-shredded Good the good bed roller mill in the classifier, the coarse material in turn the
  • the fine grinding circuit has a tube mill with at least two grinding chambers and a center discharge and a divider, wherein at least part of the ground material of the coarse grinding cycle is divided in the divider and fed to the two grinding chambers and the ground material is discharged from the two grinding chambers together via the center discharge.
  • a classifier is also provided in the fine grinding circuit, the classifier being supplied with the material coming from the roughing cycle and / or the material discharged from the tube mill, the
  • Coarse grinding material of the classifier passes to the divider and the fines are removed.
  • grinding balls with a diameter of ⁇ 25 mm are provided in the grinding chambers of the tube mill. Balls of this size show greater efficiency than larger balls. The use of these balls is only possible through the sighting in the rough grinding circle.
  • Gutbettwalzenmühle arrives in the classifier, whose coarse material turn the Good bed roller mill and its fine material is fed to the fine grinding circuit. Furthermore, a tube mill with at least two grinding chambers and a center discharge and a divider are used for the Feinrnahlnik, wherein at least part of the ground material of Grobmahlnikes divided in the divider and fed to the two grinding chambers and the ground material is discharged from the two grinding chambers together on the Mittenaustrag.
  • Fig. 1 is a schematic representation of the grinding plant with Grobmahlnik and
  • Fig. 2 is a schematic representation of the Feinmahlnikes according to a second embodiment
  • Fig. 3 is a schematic representation of the Feinmahlnikes according to a third exemplary embodiment.
  • the grinding installation shown in FIG. 1 essentially consists of a rough grinding circle 1 and a fine grinding circle 2.
  • the rough grinding circle 1 has a classifier 10 and a good bed roll mill 11.
  • Frischgut 3 or 3 ' is abandoned either on the classifier 10 or directly the Goodbettwalzenmühle 11.
  • the pre-shredded material 4 passes, possibly together with fresh material 3, into the classifier 10, the coarse good 5 of which in turn is fed to the fine-bed roller mill 11.
  • the fine material 6 of the classifier 10 enters the fine grinding circuit 2.
  • the fine grinding circuit 2 has a tube mill 20 with two grinding chambers 20a, 20b and a center discharge 20c and a divider 21. Furthermore, a classifier 22 and a further divider 23 are provided.
  • the product stream 6 coming from the roughing cycle is divided in the divider 21 into two equal partial streams 6a, 6b, which are fed to the two grinding chambers 20a, 20b.
  • the millbase 7 discharged from the tube mill 20 is classified in the classifier 22 into coarse material 8 and fine material 9. While the fines 9 is removed, the coarse material 8 of the classifier 22 passes into the further divider 23, which divides the coarse material into two equal partial streams 8a, 8b, which are supplied with the partial streams 6a and 6b of the splitter 21 to the grinding chambers 20a and 20b become.
  • the two grinding chambers 20a and 20b are formed identically, so that the dividers 21 and 23 are adjusted so that the grinding material 6, 8 supplied to the dividers is fed in equal parts to the two grinding chambers.
  • FIG. 3 shows a variant of the fine grinding circuit in which the divider 21 according to FIG. 1 has been dispensed with.
  • the grinding stock 6 coming from the rough grinding cycle is given to the classifier 22 and / or together with the coarse material 8 of the classifier to the divider 23, either together with the grinding stock 7 discharged from the tube mill.
  • the divider 23 can be adjusted again so that it generates two equal large subsets, which are fed to the two grinding chambers 20a, 20b of the tube mill.
  • the grinding chambers of the tube mill 20 are provided with grinding balls having a diameter of ⁇ 25 mm.
  • the ratio of length to diameter of each individual grinding chamber 20a, 20b is preferably less than 2.2. In the experiments on which the invention is based, it has been found that a ratio of length to diameter of ⁇ 2.0 or even ⁇ 1.7 is particularly efficient.
  • the tube mill 20 described above enables a high throughput and is compared to two separate mills to operate much cheaper and more energy efficient.

Abstract

A milling station and a method for grinding milling material using at least one coarse grinding circuit and at least one fine grinding circuit. The coarse grinding circuit includes a classifier and a material bed roller mill. The fine grinding circuit includes a tube mill with at least two grinding chambers, a central outlet, and a divider. In some instances, at least some of the milling material from the coarse grinding circuit is subdivided in the divider and delivered to the at least two grinding chambers of the fine grinding circuit while some of the milling material is jointly discharged from the at least two grinding chambers through the central outlet.

Description

Mahlanlage und Verfahren zum Mahlen von Mahlgut Grinding plant and method for grinding regrind
Die Erfindung betrifft eine Mahlanlage sowie ein Verfahren zum Mahlen von Mahlgut mit wenigstens einem Grobmahlkreis und wenigstens einem Feinmahlkreis.The invention relates to a grinding plant and a method for grinding regrind with at least one coarse grinding circle and at least one fine grinding circle.
Bei der Mahlung von Zementklinker ist es hinlänglich bekannt, die Grobmahlung mit Hilfe einer sogenannten Gutbettwalzenmühle durchzuführen, um anschließend das vorzerkleinerte Produkt in einer Rohr- bzw. Kugelmühle auf Endfeinheit zu mahlen. Diese Verfahren werden als Combi- oder auch Teilfertigmahlung bezeichnet. Meist weisen die beiden Mahlkreise Klassierer auf, so dass das Mahlgut in den einzelnenIn the milling of cement clinker, it is well known to carry out the coarse grinding with the aid of a so-called good bed roller mill, in order then to grind the pre-shredded product in a tube or ball mill to final fineness. These methods are referred to as Combi or also Teilfertigmahlung. Most of the two grinding circles on classifiers, so that the millbase in the individual
Mahlkreisen teilweise mehrfach rezirkuliert wird.Grinders partially recirculated several times.
Die Durchsatzleistung derartiger Mahlanlagen wird üblicherweise durch die Rohrmühle begrenzt. Bei der Auslegung der Rohrmühlen müssen jedoch technische Randbedingungen beachtet werden. So darf die Querschnittsbelastung derThe throughput of such grinding plants is usually limited by the tube mill. When designing the tube mills, however, technical boundary conditions must be taken into account. Thus, the cross sectional load of the
Kugelschüttung maximal 90 t/(m2h) betragen. Bei einer höheren Belastung würde das Mahlgut über der Kugelschleppe hinweglaufen. Bei höheren Feinheiten wäre die Belastbarkeit noch geringer, da der Durchsatz volumetrisch erfolgt und die Schüttdichte abnimmt.Maximum ballast 90 t / (m 2 h). At a higher load, the regrind would run over the ball tow. At higher levels of fineness, the load capacity would be even lower because the throughput is volumetric and the bulk density decreases.
Weiterhin ist ein Sichterumlauf von wenigstens 1,8 bis 2,0 anzustreben, um ausreichend niedrige Rückstandswerte im Fertiggut zu erzielen. Andererseits kann der Mühlendurchmesser nicht beliebig gesteigert werden, da die Zahl der Kugelschichten bei feingattierten Combi-Mühlen zu groß wird. So existiert zwischen jeder Schicht ein Schlupf, so dass im inneren Kern der Kugelschüttung kaum noch eine Relativbewegung der Kugeln erfolgt. In diesem Bereich findet somit dann auch keine Mahlung statt.Furthermore, a Sichterumlauf of at least 1.8 to 2.0 strive to achieve sufficiently low residue levels in the finished product. On the other hand, the diameter of the mill can not be increased arbitrarily, since the number of spherical layers in fine-grained Combi mills becomes too large. So there is a slip between each layer, so that hardly any relative movement of the balls takes place in the inner core of the ball bed. In this area, therefore, no grinding takes place.
Gemäß der DE-C-40 23 624 wird die Kugelmühle zur effektiven Desagglomeration des Gutes einer Gutbettwalzenmühle eingesetzt. Der Erfindung liegt nun die Aufgabe zugrunde, eine Mahlanlage anzugeben, die sich durch sehr große Durchsatzleistungen auszeichnet. Erfindungsgemäß wird diese Aufgabe durch die Merkmale der Ansprüche 1 und 9 gelöst.According to DE-C-40 23 624, the ball mill is used for the effective deagglomeration of the goods of a good bed roller mill. The invention is an object of the invention to provide a grinding plant, which is characterized by very high throughput. According to the invention this object is solved by the features of claims 1 and 9.
Weitere Ausgestaltungen der Erfindung sind Gegenstand der Unteransprüche.Further embodiments of the invention are the subject of the dependent claims.
Die erfindungsgemäße Mahlanlage besteht im wesentlichen aus einem Grobmahlkreis und wenigstens einem Feinmahlkreis, wobei der Grobmahlkreis einen Klassierer und eine Gutbettwalzenmühle aufweist und das vorzerkleinerte Gut der Gutbettwalzenmühle in den Klassierer gelangt, dessen Grobgut wiederum derThe grinding plant according to the invention consists essentially of a Grobmahlkreis and at least one Feinmahlkreis, the Grobmahlkreis has a classifier and a Goodbettwalzenmühle and passes the pre-shredded Good the good bed roller mill in the classifier, the coarse material in turn the
Gutbettwalzenmühle und dessen Feingut dem Feinmahlkreis zugeführt wird. Der Feinmahlkreis weist eine Rohrmühle mit wenigstens zwei Mahlkammern und einem Mittenaustrag und einen Teiler auf, wobei zumindest ein Teil des Mahlgutes des Grobmahlkreises im Teiler aufgeteilt und den beiden Mahlkammern zugeführt wird und das Mahlgut aus den beiden Mahlkammern zusammen über den Mittenaustrag ausgetragen wird.Good bed roller mill and its fine material is fed to the fine grinding circuit. The fine grinding circuit has a tube mill with at least two grinding chambers and a center discharge and a divider, wherein at least part of the ground material of the coarse grinding cycle is divided in the divider and fed to the two grinding chambers and the ground material is discharged from the two grinding chambers together via the center discharge.
Gemäß einem bevorzugten Ausführungsbeispiel ist auch im Feinmahlkreis ein Klassierer vorgesehen, wobei dem Klassierer das vom Grobmahlkreis kommende Gut und/oder das aus der Rohrmühle ausgetragene Gut zugeführt wird, wobei dasAccording to a preferred embodiment, a classifier is also provided in the fine grinding circuit, the classifier being supplied with the material coming from the roughing cycle and / or the material discharged from the tube mill, the
Grobmahlgut des Klassierers zum Teiler gelangt und das Feingut abgeführt wird.Coarse grinding material of the classifier passes to the divider and the fines are removed.
In einer weiteren Ausgestaltung der Erfindung sind in den Mahlkammern der Rohrmühle Mahlkugeln mit einem Durchmesser von <25 mm vorgesehen. Kugeln dieser Größenordnung zeigen eine größere Effizienz als größere Kugeln. Der Einsatz dieser Kugeln wird aber erst durch die Sichtung im Grobmahlkreis möglich.In a further embodiment of the invention, grinding balls with a diameter of <25 mm are provided in the grinding chambers of the tube mill. Balls of this size show greater efficiency than larger balls. The use of these balls is only possible through the sighting in the rough grinding circle.
Beim erfindungsgemäßen Verfahren zum Mahlen von Mahlgut in wenigstens einemIn the inventive method for grinding regrind in at least one
Grobmahlkreis und wenigstens einem Feinmahlkreis weist der Grobmahlkreis einen Klassierer und eine Gutbettwalzenmühle auf, wobei das vorzerkleinerte Gut derGrobmahlkreis and at least one Feinmahlkreis the Grobmahlkreis on a classifier and a Goodbettwalzenmühle on, wherein the pre-shredded Good of
Gutbettwalzenmühle in den Klassierer gelangt, dessen Grobgut wiederum der Gutbettwalzenmühle und dessen Feingut dem Feinmahlkreis zugeführt wird. Weiterhin werden für den Feinrnahlkreis eine Rohrmühle mit wenigstens zwei Mahlkammern und einem Mittenaustrag und ein Teiler verwendet, wobei zumindest ein Teil des Mahlgutes des Grobmahlkreises im Teiler aufgeteilt und den beiden Mahlkammern zugeführt wird und das Mahlgut aus den beiden Mahlkammern zusammen über den Mittenaustrag ausgetragen wird.Gutbettwalzenmühle arrives in the classifier, whose coarse material turn the Good bed roller mill and its fine material is fed to the fine grinding circuit. Furthermore, a tube mill with at least two grinding chambers and a center discharge and a divider are used for the Feinrnahlkreis, wherein at least part of the ground material of Grobmahlkreises divided in the divider and fed to the two grinding chambers and the ground material is discharged from the two grinding chambers together on the Mittenaustrag.
Weitere Vorteile der Erfindung werden im folgenden anhand der Beschreibung einiger Ausfuhrungsbeispiele und der Zeichnung näher erläutert.Further advantages of the invention will be explained in more detail below with reference to the description of some exemplary embodiments and the drawing.
In der Zeichnung zeigenIn the drawing show
Fig. 1 eine schematische Darstellung der Mahlanlage mit Grobmahlkreis undFig. 1 is a schematic representation of the grinding plant with Grobmahlkreis and
Feinmahlkreis gemäß einem ersten AusführungsbeispielFine grinding circuit according to a first embodiment
Fig. 2 eine schematische Darstellung des Feinmahlkreises gemäß einem zweiten Ausführungsbeispiel undFig. 2 is a schematic representation of the Feinmahlkreises according to a second embodiment and
Fig. 3 eine schematische Darstellung des Feinmahlkreises gemäß einem dritten Ausfuhrungsbeispiel.Fig. 3 is a schematic representation of the Feinmahlkreises according to a third exemplary embodiment.
Die in Fig. 1 dargestellte Mahlanlage besteht im wesentlichen aus einem Grobmahlkreis 1 und einem Feinmahlkreis 2. Der Grobmahlkreis 1 weist einen Klassierer 10 und eine Gutbettwalzenmühle 11 auf. Frischgut 3 bzw. 3' wird entweder über den Klassierer 10 oder direkt der Gutbettwalzenmühle 11 aufgegeben.The grinding installation shown in FIG. 1 essentially consists of a rough grinding circle 1 and a fine grinding circle 2. The rough grinding circle 1 has a classifier 10 and a good bed roll mill 11. Frischgut 3 or 3 'is abandoned either on the classifier 10 or directly the Goodbettwalzenmühle 11.
Das vorzerkleinerte Gut 4 gelangt, ggf. zusammen mit Frischgut 3, in den Klassierer 10, dessen Grob gut 5 wiederum der Gutbettwalzenmühle 11 zugeführt wird. Das Feingut 6 des Klassierers 10 gelangt in den Feinmahlkreis 2. Der Feinmahlkreis 2 weist eine Rohrmühle 20 mit zwei Mahlkammern 20a, 20b und einem Mittenaustrag 20c sowie einen Teiler 21 auf. Weiterhin ist ein Klassierer 22 sowie ein weiterer Teiler 23 vorgesehen.The pre-shredded material 4 passes, possibly together with fresh material 3, into the classifier 10, the coarse good 5 of which in turn is fed to the fine-bed roller mill 11. The fine material 6 of the classifier 10 enters the fine grinding circuit 2. The fine grinding circuit 2 has a tube mill 20 with two grinding chambers 20a, 20b and a center discharge 20c and a divider 21. Furthermore, a classifier 22 and a further divider 23 are provided.
Der vom Grobmahlkreis kommende Produktstrom 6 wird im Teiler 21 in zwei gleiche Teilströme 6a, 6b aufgeteilt, die den beiden Mahlkammern 20a, 20b zugeführt werden. Das aus der Rohrmühle 20 ausgetragene Mahlgut 7 wird im Klassierer 22 in Grobgut 8 und Feingut 9 klassiert. Während das Feingut 9 abgeführt wird, gelangt das Grobgut 8 des Klassierers 22 in den weiteren Teiler 23, der das Grobgut in zwei gleich große Teilströme 8a, 8b aufteilt, die mit den Teilströmen 6a und 6b des Splitters 21 den Mahlkammern 20a bzw. 20b zugeführt werden.The product stream 6 coming from the roughing cycle is divided in the divider 21 into two equal partial streams 6a, 6b, which are fed to the two grinding chambers 20a, 20b. The millbase 7 discharged from the tube mill 20 is classified in the classifier 22 into coarse material 8 and fine material 9. While the fines 9 is removed, the coarse material 8 of the classifier 22 passes into the further divider 23, which divides the coarse material into two equal partial streams 8a, 8b, which are supplied with the partial streams 6a and 6b of the splitter 21 to the grinding chambers 20a and 20b become.
Gemäß einer bevorzugten Ausgestaltung der Erfindung sind die beiden Mahlkammern 20a und 20b identisch ausgebildet, so dass auch die Teiler 21 und 23 so eingestellt sind, dass das den Teilern zugeführte Mahlgut 6, 8 zu gleichen Teilen den beiden Mahlkammern zugeführt wird.According to a preferred embodiment of the invention, the two grinding chambers 20a and 20b are formed identically, so that the dividers 21 and 23 are adjusted so that the grinding material 6, 8 supplied to the dividers is fed in equal parts to the two grinding chambers.
In dem in Fig. 2 gezeigten Ausführungsbeispiel des Feinmahlkreises wird auf den Klassierer im Feinmahlkreis verzichtet, so dass den beiden Mahlkammern 20a, 20b lediglich das im Teiler 21 zu gleichen Teilen aufgeteilte Mahlgut 6 desIn the embodiment of the Feinmahlkreises shown in Fig. 2 is dispensed with the classifier in Feinmahlkreis, so that the two grinding chambers 20a, 20b only in the divider 21 divided into equal parts 6 Mahlgut
Grobmahlkreises zugeführt wird. Das aus der Rohrmühle 20 über deren Mittenaustrag 20c ausgetragene Gut wird als Fertigprodukt 7 abgeführt.Grobmahlkreises is supplied. The discharged from the tube mill 20 via the center discharge 20c Good is discharged as finished product 7.
Fig. 3 zeigt eine Variante des Feinmahlkreises, bei der auf den Teiler 21 gemäß Fig. 1 verzichtet worden ist. Das aus dem Grobmahlkreis kommende Mahlgut 6 wird bei dieser Variante entweder zusammen mit dem aus der Rohrmühle ausgetragene Mahlgut 7 dem Klassierer 22 und/oder zusammen mit dem Grobgut 8 des Klassierers dem Teiler 23 aufgegeben. Der Teiler 23 kann wieder so eingestellt werden, dass er zwei gleiche große Teilmengen erzeugt, die den beiden Mahlkammern 20a, 20b der Rohrmühle zugeführt werden. Die Mahlkammern der Rohrmühle 20 sind mit Mahlkugeln versehen, die einen Durchmesser von <25 mm aufweisen. Darüber hinaus ist das Verhältnis von Länge zur Durchmesser jeder einzelnen Mahlkammer 20a, 20b vorzugsweise kleiner als 2,2. Bei den der Erfindung zugrunde liegenden Versuchen hat sich herausgestellt, dass ein Verhältnis von Länge zur Durchmesser von ≤2,0 oder gar <1,7 besonders effizient ist.FIG. 3 shows a variant of the fine grinding circuit in which the divider 21 according to FIG. 1 has been dispensed with. In this variant, the grinding stock 6 coming from the rough grinding cycle is given to the classifier 22 and / or together with the coarse material 8 of the classifier to the divider 23, either together with the grinding stock 7 discharged from the tube mill. The divider 23 can be adjusted again so that it generates two equal large subsets, which are fed to the two grinding chambers 20a, 20b of the tube mill. The grinding chambers of the tube mill 20 are provided with grinding balls having a diameter of <25 mm. Moreover, the ratio of length to diameter of each individual grinding chamber 20a, 20b is preferably less than 2.2. In the experiments on which the invention is based, it has been found that a ratio of length to diameter of ≦ 2.0 or even <1.7 is particularly efficient.
Die oben beschriebene Rohrmühle 20 ermöglicht eine hohe Durchsatzleistung und ist gegenüber zweier separater Mühlen erheblich kostengünstiger und energiesparender zu betreiben. The tube mill 20 described above enables a high throughput and is compared to two separate mills to operate much cheaper and more energy efficient.

Claims

Patentansprüche: claims:
1. Mahlanlage mit wenigstens einem Grobmahlkreis (1) und wenigstens einem Feinmahlkreis (2), wobei der Grobmahlkreis einen Klassierer (10) und eine Gutbettwalzenmühle (1-1) aufweist und das vorzerkleinerte Gut der1. Mahlanlage with at least one Grobmahlkreis (1) and at least one Feinmahlkreis (2), wherein the Grobmahlkreis a classifier (10) and a Gutbettwalzenmühle (1-1) and the pre-shredded Good
Gutbettwalzenmühle in den Klassierer gelangt, dessen Grobgut (5) wiederum der Gutbettwalzenmühle und dessen Feingut zumindest zum überwiegenden Teil dem Feinmahlkreis zugeführt wird, dadurch gekennzeichnet, dass der Feinmahlkreis eine Rohrmühle (20) mit wenigstens zwei Mahlkammern (20a, 20b) und einem Mittenaustrag (20c) und einen Teiler (21) aufweist, wobei zumindest ein Teil des Mahlgutes des Grobmahlkreises im Teiler aufgeteilt und den beiden Mahlkammern zugeführt wird und das Mahlgut aus den beiden Mahlkammern zusammen über den Mittenaustrag ausgetragen wird.Gutbettwalzenmühle arrives in the classifier, the coarse material (5) in turn the Gutbettwalzenmühle and its fine material is fed to the Feinmahlkreis at least for the most part, characterized in that the Feinmahlkreis a tube mill (20) with at least two grinding chambers (20a, 20b) and a Mittenaustrag ( 20c) and a divider (21), wherein at least part of the ground material of the coarse grinding circuit is divided in the divider and fed to the two grinding chambers and the ground material is discharged from the two grinding chambers together via the center discharge.
2. Mahlanlage nach Anspruch 1, dadurch gekennzeichnet, dass die beiden2. grinding plant according to claim 1, characterized in that the two
Mahlkammern (20a, 20b) identisch ausgebildet sind und der Teiler (21) so eingestellt ist, dass das dem Teiler zugeführte Mahlgut (6) zu gleichen Teilen den beiden Mahlkammern zugeführt wird.Grinding chambers (20a, 20b) are formed identically and the divider (21) is set so that the divider supplied to the grinding material (6) is supplied in equal parts to the two grinding chambers.
3. Mahlanlage nach Anspruch 1, dadurch gekennzeichnet, dass im Feinmahlkreis ein Klassierer (22) vorgesehen ist, dem zumindest das gesamte Mahlgut (7) aus dem Mittenaustrag der Rohrmühle zugeführt wird.3. grinding plant according to claim 1, characterized in that in the Feinmahlkreis a classifier (22) is provided to which at least the entire material to be ground (7) from the center discharge of the tube mill is supplied.
4. Mahlanlage nach Anspruch 1, dadurch gekennzeichnet, dass im Feinmahlkreis ein Klassierer (22) vorgesehen ist, dem zumindest das gesamte Mahlgut (7) aus dem Mittenaustrag der Rohrmühle und zumindest zum Teil das vom Grobmahlkreis kommende Gut (6) zugeführt wird.4. grinding plant according to claim 1, characterized in that in Feinmahlkreis a classifier (22) is provided to which at least the entire material to be ground (7) from the center discharge of the tube mill and at least partially coming from the Grobmahlkreis Good (6) is supplied.
5. Mahlanlage nach Anspruch I5 dadurch gekennzeichnet, dass im Feinmahlkreis ein Klassierer (22) vorgesehen ist, dem zumindest das gesamte Mahlgut (7) aus dem Mittenaustrag der Rohrmühle und gegebenenfalls das vom Grobmahlkreis kommende Gut (6) zugeführt wird, wobei das Grobgut (8) des Klassierers zu einem Teiler (23) gelangt und das Feingut (9) abgeführt wird.5. grinding plant according to claim I 5, characterized in that in the fine grinding a classifier (22) is provided, the at least the entire material to be ground (7) from the center discharge of the tube mill and optionally from the Grobmahlkreis incoming Good (6) is supplied, wherein the coarse material (8) of the classifier passes to a divider (23) and the fines (9) is discharged.
6. Mahlanlage nach Anspruch 1, dadurch gekennzeichnet, dass die beiden Mahlkammern (20a, 20b) mit Mahlkörpern ausgestattet sind.6. grinding plant according to claim 1, characterized in that the two grinding chambers (20a, 20b) are equipped with grinding media.
7. Mahlanlage nach Anspruch 1, dadurch gekennzeichnet, dass in den Mahlkammern (20a, 20b) der Rohrmühle (20) Mahlkugeln mit einem Durchmesser von <25 mm vorgesehen sind.7. grinding plant according to claim 1, characterized in that in the grinding chambers (20a, 20b) of the tube mill (20) grinding balls are provided with a diameter of <25 mm.
8. Mahlanlage nach Anspruch 1, dadurch gekennzeichnet, dass das Verhältnis von Länge zu Breite jeder Mahlkammer (20a, 20b) ≤2,2 beträgt.8. grinding plant according to claim 1, characterized in that the ratio of length to width of each grinding chamber (20a, 20b) is ≤2.2.
9. Verfahren zum Mahlen von Mahlgut in wenigstens einem Grobmahlkreis (1) und wenigstens einem Feinmahlkreis (2), wobei der Grobmahlkreis einen Klassierer9. A method for grinding regrind in at least one Grobmahlkreis (1) and at least one Feinmahlkreis (2), wherein the Grobmahlkreis a classifier
(10) und eine Gutbettwalzenmühle (11) aufweist und das vorzerkleinerte Gut der Gutbettwalzenmühle in den Klassierer gelangt, dessen Grobgut (5) wiederum der Gutbettwalzenmühle und dessen Feingut zumindest zum überwiegenden Teil dem Feinmahlkreis zugeführt wird, dadurch gekennzeichnet, dass für den Feinmahlkreis eine Rohrmühle (20) mit wenigstens zwei Mahlkammern (20a,(10) and a Gutbettwalzenmühle (11) and the pre-shredded Good the good bed roller mill passes into the classifier, the coarse material (5) turn the Gutbettwalzenmühle and its fine material is at least for the most part fed to the Feinmahlkreis, characterized in that for the Feinmahlkreis a tube mill (20) with at least two grinding chambers (20a, 20b)
20b) und einem Mittenaustrag (20c) und ein Teiler (21) verwendet werden, wobei zumindest ein Teil des Mahlgutes des Grobmahlkreises (6) im Teiler (21) aufgeteilt und den beiden Mahlkammern zugeführt wird und das Mahlgut aus den beiden Mahlkammern zusammen über den Mittenaustrag ausgetragen wird.20b) and a center discharge (20c) and a divider (21) are used, wherein at least part of the ground material of the coarse grinding circuit (6) in the divider (21) divided and fed to the two grinding chambers and the ground material from the two grinding chambers together via the Center discharge is discharged.
10. Verfahren nach Anspruch 10, dadurch gekennzeichnet, dass der Rohrmühle (20) das Mahlgut (6) des Grobmahlkreises und rückgeführtes, klassiertes Mahlgut (7) der Rohrmühle zugeführt wird. 10. The method according to claim 10, characterized in that the tube mill (20) the ground material (6) of the coarse grinding circuit and recycled, classified regrind (7) is fed to the tube mill.
EP06706945A 2005-02-16 2006-02-14 Milling station and method for grinding milling material Expired - Fee Related EP1850962B1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE102005007254A DE102005007254A1 (en) 2005-02-16 2005-02-16 Grinding plant and process for grinding regrind
PCT/EP2006/001339 WO2006087167A1 (en) 2005-02-16 2006-02-14 Milling station and method for grinding milling material

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EP1850962A1 true EP1850962A1 (en) 2007-11-07
EP1850962B1 EP1850962B1 (en) 2011-01-19

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US (1) US7971815B2 (en)
EP (1) EP1850962B1 (en)
CN (1) CN101160175A (en)
AT (1) ATE495820T1 (en)
DE (2) DE102005007254A1 (en)
DK (1) DK1850962T3 (en)
RU (1) RU2007134351A (en)
WO (1) WO2006087167A1 (en)

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CN101160175A (en) 2008-04-09
US7971815B2 (en) 2011-07-05
US20090020636A1 (en) 2009-01-22
EP1850962B1 (en) 2011-01-19
DE102005007254A9 (en) 2007-03-08
ATE495820T1 (en) 2011-02-15
WO2006087167A1 (en) 2006-08-24
DK1850962T3 (en) 2011-05-09
RU2007134351A (en) 2009-03-27
DE102005007254A1 (en) 2006-08-17
DE502006008763D1 (en) 2011-03-03

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