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EP0237641A2 - Comminuting plant for brittle material - Google Patents

Comminuting plant for brittle material Download PDF

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Publication number
EP0237641A2
EP0237641A2 EP86117585A EP86117585A EP0237641A2 EP 0237641 A2 EP0237641 A2 EP 0237641A2 EP 86117585 A EP86117585 A EP 86117585A EP 86117585 A EP86117585 A EP 86117585A EP 0237641 A2 EP0237641 A2 EP 0237641A2
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EP
European Patent Office
Prior art keywords
agglomerates
regrind
roller mill
feed plate
plant
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
EP86117585A
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German (de)
French (fr)
Other versions
EP0237641B1 (en
EP0237641A3 (en
Inventor
Gerhard Dipl.-Ing. Gudat
Manfred Dipl.-Ing. Müller
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
ThyssenKrupp Industrial Solutions AG
Original Assignee
Krupp Polysius AG
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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B07—SEPARATING SOLIDS FROM SOLIDS; SORTING
    • B07B—SEPARATING SOLIDS FROM SOLIDS BY SIEVING, SCREENING, SIFTING OR BY USING GAS CURRENTS; SEPARATING BY OTHER DRY METHODS APPLICABLE TO BULK MATERIAL, e.g. LOOSE ARTICLES FIT TO BE HANDLED LIKE BULK MATERIAL
    • B07B7/00—Selective separation of solid materials carried by, or dispersed in, gas currents
    • B07B7/08—Selective separation of solid materials carried by, or dispersed in, gas currents using centrifugal force
    • B07B7/083—Selective separation of solid materials carried by, or dispersed in, gas currents using centrifugal force generated by rotating vanes, discs, drums, or brushes
    • 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
    • B02C21/005—Disintegrating 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
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B02—CRUSHING, PULVERISING, OR DISINTEGRATING; PREPARATORY TREATMENT OF GRAIN FOR MILLING
    • B02C—CRUSHING, PULVERISING, OR DISINTEGRATING IN GENERAL; MILLING GRAIN
    • B02C23/00—Auxiliary methods or auxiliary devices or accessories specially adapted for crushing or disintegrating not provided for in preceding groups or not specially adapted to apparatus covered by a single preceding group
    • B02C23/08—Separating or sorting of material, associated with crushing or disintegrating
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B02—CRUSHING, PULVERISING, OR DISINTEGRATING; PREPARATORY TREATMENT OF GRAIN FOR MILLING
    • B02C—CRUSHING, PULVERISING, OR DISINTEGRATING IN GENERAL; MILLING GRAIN
    • B02C23/00—Auxiliary methods or auxiliary devices or accessories specially adapted for crushing or disintegrating not provided for in preceding groups or not specially adapted to apparatus covered by a single preceding group
    • B02C23/18—Adding fluid, other than for crushing or disintegrating by fluid energy
    • B02C23/24—Passing gas through crushing or disintegrating zone
    • B02C23/32—Passing gas through crushing or disintegrating zone with return of oversize material to crushing or disintegrating zone

Definitions

  • the invention relates to a plant for comminuting brittle regrind, such as cement clinker, according to the preamble of claim 1.
  • the agglomerates formed in the roller mill can also be connected in a downstream device, such as. B. ball mill, spreading plate wind sifter or classifying sieve, one making use of the simultaneously deagglomerating effect of a device which is primarily assigned to another process step. If the dissolution of the agglomerates is to be carried out, for example, in a conventional spreading plate wind sifter, this places an additional load on the spreading or feed plate of the wind sifter, so that a completely inadequate dissolution of the agglomerates must be expected.
  • a downstream device such as. B. ball mill, spreading plate wind sifter or classifying sieve
  • the invention is therefore based on the object of developing a system of the type required in the preamble of claim 1 in such a way that, with a good dissolving effect of the agglomerates, it is characterized by improved economy, in particular reduced energy consumption.
  • the agglomerates formed in the roll nip of the roll mill are dissolved by a special device before the screening and within the classifier, that is to say this special device is not formed by the spreading or feed plate alone, as in the known embodiment explained last, but rather the rotating regrind feed plate is equipped with impact elements.
  • This impact elements exposes the high fine fraction of the ground material contained in the agglomerates (slugs) and removes them from the grinding system during the subsequent screening, so that this fine fraction no longer stresses the subsequent comminution stage.
  • the size reduction stage downstream of the classifier (generally a ball mill) can be dimensioned smaller in new plants and in existing plants (in which there is subsequently a deagglomeration of the regrind the sighting is provided) is loaded less.
  • the operation of the downstream comminution stage can also be better adapted to the operation of the roller mill in this embodiment according to the invention.
  • the grinding system shown in FIG. 1 for comminuting brittle ground material for example cement clinker, contains a roller mill 1, a classifier 2 with a built-in deagglomerator and a ball mill 3.
  • the roller mill 1 contains two rollers 4, 5, in the gap of which the millbase is subjected to single grain size reduction and material bed size reduction using high pressure and the formation of agglomerates.
  • the ground material discharged from the roller mill 1 is then fed to the classifier 2.
  • the classifier 2 (the details of which can be found in FIG. 2) contains a rotating classifying system 7 in the upper part of the housing 6, which is driven by a shaft 8.
  • a rotating regrind feed plate 9 is arranged below the rotating viewing system 7 and is equipped with impact elements 10, 11 of different heights.
  • the grinding material feed plate 9 is driven from below by a shaft 12.
  • regrind feed plate 9 there is a feed hopper 13 to which the regrind is fed via a screw conveyor 14.
  • the classifying air enters in the lower area of the housing 6 via a nozzle 15 and then passes through a fixed blind ring 16.
  • the fine material is removed from the classifying air through the nozzle 17 and separated in a cyclone or filter (not shown in FIG. 1).
  • the semolina (arrow 23) are discharged from the housing 6 via a funnel 18 and fed to the ball mill 3. Their grains are again fed to the classifier 2 (arrow 19), while the fine material obtained in the ball mill 3 is drawn off with the mill exhaust air 20.
  • the ground material discharged from the roller mill 1 contains a high proportion of agglomerates (flakes). These agglomerates are largely dissolved in the sifter 2, specifically before they enter the classifying space 21, when the regrind on the rotating regrind feed plate 9 passes the impact elements 10 during the outward movement. As a result of this dissolution of the agglomerates, the high fine fraction contained therein is exposed, carried upward by the classifying air (arrows 22) and discharged in a cyclone or filter connected downstream of the classifier 2 divorced. The ball mill 3 is therefore only loaded with the semolina accumulating in the classifier 2, but not with fines.
  • the screening and the dissolution of the agglomerates can be optimized independently of one another.
  • the regrind feed plate 9 ⁇ which is also covered on its circumference with impact elements 10 declare and is driven by a core shaft 8 ⁇ , is located within a further drum 24, which is circumferentially occupied with impact elements 25 and is driven by an outer shaft 26.
  • the regrind is fed in via a feed hopper 13.
  • the speeds of the shafts 8 ⁇ and 26 can be selected differently. It is also possible that the outer drum 24 with the impact elements 25 is arranged stationary and only the regrind feed plate 9eller is driven.
  • the agglomerates formed in the roller mill 1 are effectively dissolved before the ground material is introduced into the classifying chamber 21 of the classifier 2.

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

Abstract

Die Erfindung betrifft eine Anlage zur Zerkleinerung von sprödem Mahlgut, das in einer Walzenmühle unter Anwendung hohen Druckes und Bildung von Agglomeraten einer Einzelkornzerkleinerung und einer Gutbettzerkleinerung unterworfen wird und dessen Agglomerate im Sichter mit Hilfe einer gesonderten Einrichtung aufgelöst werden. Auf diese Weise wird eine zur Nachzerkleinerung vorgesehene Mahlstufe wesentlich entlastet und dadurch die Wirtschaftlichkeit der Anlage erheblich verbessert.The invention relates to a plant for comminuting brittle regrind, which is subjected to single grain comminution and material bed comminution in a roller mill using high pressure and formation of agglomerates and the agglomerates of which are dissolved in the classifier with the aid of a separate device. In this way, a grinding stage provided for secondary comminution is substantially relieved and the economy of the plant is thereby considerably improved.

Description

Die Erfindung betrifft eine Anlage zur Zerkleine­rung von sprödem Mahlgut, wie Zementklinker, ge­mäß dem Oberbegriff des Patentanspruches 1.The invention relates to a plant for comminuting brittle regrind, such as cement clinker, according to the preamble of claim 1.

Durch die EP-A- 0 084 383 ist es beispielsweise bekannt, das Mahlgut zunächst in einer Walzenmüh­le unter Anwendung hohen Druckes und Bildung von Agglomeraten einer Einzelkornzerkleinerung und Gutbettzerkleinerung zu unterwerfen. Anschließend erfolgt eine Sichtung des Mahlgutes, wobei die bei der Sichtung anfallenden Grieße in einer nach­geschalteten Mühle weiter zerkleinert werden.From EP-A-0 084 383 it is known, for example, to first subject the ground material to comminution and material bed comminution in a roller mill using high pressure and the formation of agglomerates. The ground material is then sifted, with the semolina resulting from the sifting being further comminuted in a downstream mill.

Gemäß einer anderen bekannten Anlage, wie sie im Oberbegriff des Anspruches 1 vorausgesetzt wird (DE-A- 33 02 176), können darüber hinaus die in der Walzenmühle gebildeten Agglomerate in einer dieser Walzenmühle nachgeschalteten Einrichtung, wie z. B. Kugelmühle, Streuteller-Windsichter oder Klassiersieb aufgelöst werden, wobei man sich der zugleich desagglomerierenden Wirkung eines Gerätes bedient, das primär einem anderen Verfahrensschritt zugeordnet ist. Wenn somit die Auflösung der Agglomerate beispielsweise in einem herkömmlichen Streuteller-Windsichter vorgenommen werden soll, dann stellt dies eine zusätzliche Belastung des Streu- bzw. Aufgabetellers des Wind­sichters dar, so daß mit einer vollkommen unzu­reichenden Auflösung der Agglomerate gerechnet werden muß.According to another known system, as is required in the preamble of claim 1 (DE-A-33 02 176), the agglomerates formed in the roller mill can also be connected in a downstream device, such as. B. ball mill, spreading plate wind sifter or classifying sieve, one making use of the simultaneously deagglomerating effect of a device which is primarily assigned to another process step. If the dissolution of the agglomerates is to be carried out, for example, in a conventional spreading plate wind sifter, this places an additional load on the spreading or feed plate of the wind sifter, so that a completely inadequate dissolution of the agglomerates must be expected.

Der Erfindung liegt daher die Aufgabe zugrunde, eine Anlage der im Oberbegriff des Anspruches 1 vorausgesetzten Art dahin weiterzuentwickeln, daß sie sich bei guter Auflösewirkung der Agglomerate durch eine verbesserte Wirtschaftlickeit, insbe­sondere einen verringerten Energieverbrauch, aus­zeichnet.The invention is therefore based on the object of developing a system of the type required in the preamble of claim 1 in such a way that, with a good dissolving effect of the agglomerates, it is characterized by improved economy, in particular reduced energy consumption.

Diese Aufgabe wird erfindungsgemäß durch das kenn­zeichnende Merkmal des Anspruches 1 gelöst. In dieser erfindungsgemäßen Anlage werden die im Walzenspalt der Walzenmühle gebildeten Agglome­rate vor der Sichtung und innerhalb des Sichters durch eine besondere Einrichtung aufgelöst, d. h. diese besondere Einrichtung wird nicht - wie bei der zuletzt erläuterten bekannten Ausführung - ­durch den Streu- oder Aufgabeteller allein gebil­det, sondern der rotierende Mahlgut-Aufgabeteller ist dazu mit Prallelementen besetzt. Durch die Einwirkung dieser Prallelemente wird der in den Agglomeraten (Schülpen) enthaltene hohe Feinan­teil des Mahlgutes freigelegt und bei der an­schließenden Sichtung aus dem Mahlsystem ent­fernt, so daß dieser Feinanteil nicht mehr die nachfolgende Zerkleinerungsstufe belastet. Hier­bei wirkt sich ferner vorteilhaft aus, daß der mit den Prallelementen besetzte Mahlgut-Aufgabe­teller unabhängig vom Sichtorgan des Sichters angetrieben ist, d. h. die Sichtung und die Auf­lösung der Agglomerate können unabhängig vonein­ander optimiert werden. Auf diese Weise wird die Wirtschaftlichkeit der gesamten Anlage wesent­lich verbessert und durch die Entlastung der wei­teren Zerkleinerungsstufe ergibt sich insbesonde­re eine beachtliche Senkung des Energiebedarfes.This object is achieved by the characterizing feature of claim 1. In this system according to the invention, the agglomerates formed in the roll nip of the roll mill are dissolved by a special device before the screening and within the classifier, that is to say this special device is not formed by the spreading or feed plate alone, as in the known embodiment explained last, but rather the rotating regrind feed plate is equipped with impact elements. The action of these impact elements exposes the high fine fraction of the ground material contained in the agglomerates (slugs) and removes them from the grinding system during the subsequent screening, so that this fine fraction no longer stresses the subsequent comminution stage. This also has an advantageous effect that the regrind feed plate fitted with the baffle elements is driven independently of the classifying organ of the classifier, ie the classifying and dissolving of the agglomerates can be optimized independently of one another. In this way the The efficiency of the entire system has been significantly improved and the reduction in the further size reduction stage has resulted in a notable reduction in energy consumption.

Vorteilhaft ist ferner, daß durch die zuverlässi­ge Auflösung der Agglomerate und der damit verbes­serten Aussichtung des darin enthaltenen Feinan­teils die dem Sichter nachgeschaltete Zerkleine­rungsstufe (im allgemeinen eine Kugelmühle) bei Neuanlagen kleiner dimensioniert werden kann und bei bestehenden Anlagen (in denen nachträglich eine Desagglomeration des Mahlgutes vor der Sich­tung vorgesehen wird) niedriger belastet wird. Auch der Betrieb der nachgeschalteten Zerkleine­rungsstufe läßt sich bei dieser erfindungsgemäßen Ausführung besser dem Betrieb der Walzenmühle an­passen.It is also advantageous that, due to the reliable dissolution of the agglomerates and the improved viewing of the fine fraction contained therein, the size reduction stage downstream of the classifier (generally a ball mill) can be dimensioned smaller in new plants and in existing plants (in which there is subsequently a deagglomeration of the regrind the sighting is provided) is loaded less. The operation of the downstream comminution stage can also be better adapted to the operation of the roller mill in this embodiment according to the invention.

Die Erfindung ist in der Zeichnung beispielswei­se veranschaulicht. Es zeigen

  • Fig. 1 ein Schema einer erfindungsgemäßen Mahl­anlage,
  • Fig.2 eine schematische Schnittdarstellung des Sichters (mit eingebautem Desagglo­merator) der Anlage gemäß Fig.1,
  • Fig.3 eine Variante des Desagglomerators.
The invention is illustrated in the drawing, for example. Show it
  • 1 is a diagram of a grinding plant according to the invention,
  • 2 shows a schematic sectional illustration of the classifier (with built-in deagglomerator) of the system according to FIG. 1,
  • 3 shows a variant of the deagglomerator.

Die in Fig.1 dargestellte Mahlanlage zur Zer­kleinerung von sprödem Mahlgut, beispielsweise Zementklinker, enthält eine Walzenmühle 1, einen Sichter 2 mit eingebautem Desagglomerator sowie eine Kugelmühle 3.The grinding system shown in FIG. 1 for comminuting brittle ground material, for example cement clinker, contains a roller mill 1, a classifier 2 with a built-in deagglomerator and a ball mill 3.

Die Walzenmühle 1 enthält zwei Walzen 4, 5, in deren Spalt das Mahlgut unter Anwendung hohen Druckes und Bildung von Agglomeraten eine Ein­zelkornzerkleinerung und eine Gutbettzerkleinerung erfährt.The roller mill 1 contains two rollers 4, 5, in the gap of which the millbase is subjected to single grain size reduction and material bed size reduction using high pressure and the formation of agglomerates.

Das aus der Walzenmühle 1 ausgetragene Mahlgut wird dann dem Sichter 2 zugeführt. Der Sichter 2 (dessen Einzelheiten aus Fig.2 zu entnehmen sind) enthält im oberen Teil des Gehäuses 6 ein rotieren­des Sichtsystem 7, das über eine Welle 8 angetrie­ben wird.The ground material discharged from the roller mill 1 is then fed to the classifier 2. The classifier 2 (the details of which can be found in FIG. 2) contains a rotating classifying system 7 in the upper part of the housing 6, which is driven by a shaft 8.

Unterhalb des rotierenden Sichtsystemes 7 ist ein rotierender Mahlgut-Aufgabeteller 9 ange­ordnet, der mit Prallelementen 10, 11 unter­schiedlicher Höhe besetzt ist. Der Antrieb des Mahlgut-Aufgabetellers 9 erfolgt von unten durch eine Welle 12.A rotating regrind feed plate 9 is arranged below the rotating viewing system 7 and is equipped with impact elements 10, 11 of different heights. The grinding material feed plate 9 is driven from below by a shaft 12.

Oberhalb des Mahlgut-Aufgabetellers 9 befindet sich ein Aufgabetrichter 13, dem das Mahlgut über eine Förderschnecke 14 zugeführt wird.Above the regrind feed plate 9 there is a feed hopper 13 to which the regrind is fed via a screw conveyor 14.

Die Sichtluft tritt im unteren Bereich des Gehäu­ses 6 über einen Stutzen 15 ein und durchsetzt dann einen feststehenden Jalousiekranz 16. Das Feingut wird von der Sichtluft durch den Stutzen 17 abgeführt und in einem (in Fig.1 nicht dar­gestellten) Zyklon oder Filter abgeschieden.The classifying air enters in the lower area of the housing 6 via a nozzle 15 and then passes through a fixed blind ring 16. The fine material is removed from the classifying air through the nozzle 17 and separated in a cyclone or filter (not shown in FIG. 1).

Die Grieße (Pfeil 23) werden über einen Trichter 18 aus dem Gehäuse 6 ausgetragen und der Kugelmühle 3 zugeführt. Deren Grieße werden erneut dem Sich­ter 2 zugeleitet (Pfeil 19), während das in der Kugelmühle 3 anfallende Feingut mit der Mühlenab­luft 20 abgezogen wird.The semolina (arrow 23) are discharged from the housing 6 via a funnel 18 and fed to the ball mill 3. Their grains are again fed to the classifier 2 (arrow 19), while the fine material obtained in the ball mill 3 is drawn off with the mill exhaust air 20.

Aufgrund der in der Walzenmühle 1 erfolgenden Gutbettzerkleinerung enthält das aus der Walzen­mühle 1 ausgetragene Mahlgut einen hohen Anteil von Agglomeraten (Schülpen). Diese Agglomerate werden im Sichter 2, und zwar vor ihrem Eintritt in den Sichtraum 21, weitgehend aufgelöst, wenn das Mahlgut auf dem rotierenden Mahlgut-Aufgabe-­teller 9 bei der Bewegung nach außen die Prall­elemente 10 passiert. Durch diese Auflösung der Agglomerate wird der darin enthaltene hohe Fein­anteil freigelegt, von der Sichtluft (Pfeile 22) mit nach oben geführt und in einem dem Sich­ter 2 nachgeschalteten Zyklon oder Filter abge­ schieden. Die Kugelmühle 3 wird daher lediglich mit den im Sichter 2 anfallenden Grießen, nicht dagegen mit Feingut belastet.Due to the material bed comminution taking place in the roller mill 1, the ground material discharged from the roller mill 1 contains a high proportion of agglomerates (flakes). These agglomerates are largely dissolved in the sifter 2, specifically before they enter the classifying space 21, when the regrind on the rotating regrind feed plate 9 passes the impact elements 10 during the outward movement. As a result of this dissolution of the agglomerates, the high fine fraction contained therein is exposed, carried upward by the classifying air (arrows 22) and discharged in a cyclone or filter connected downstream of the classifier 2 divorced. The ball mill 3 is therefore only loaded with the semolina accumulating in the classifier 2, but not with fines.

Da das Sichtsystem 7 und der Mahlgut-Aufgabeteller 9 über gesonderte Wellen 8 bzw. 12 angetrieben sind, können die Sichtung und die Auflösung der Agglomerate unabhängig voneinander optimiert werden.Since the viewing system 7 and the regrind feed plate 9 are driven by separate shafts 8 and 12, the screening and the dissolution of the agglomerates can be optimized independently of one another.

Bei dem in Fig.3 dargestellten abgewandelten Aus­führungsbeispiel des Desagglomerators befindet sich der an seinem Umfang gleichfalls mit Prall­elementen 10ʹ besetzte Mahlgut-Aufgabeteller 9ʹ, io der über eine Kernwelle 8ʹ angetrieben wird, inner­halb einer weiteren Trommel 24, die an ihrem Um­fang mit Prallelementen 25 besetzt ist und durch eine äußere Welle 26 angetrieben wird. Die Auf­gabe des Mahlgutes erfolgt über einen Aufgabe­trichter 13.In the modified exemplary embodiment of the deagglomerator shown in FIG. 3, the regrind feed plate 9ʹ, which is also covered on its circumference with impact elements 10 Umfang and is driven by a core shaft 8ʹ, is located within a further drum 24, which is circumferentially occupied with impact elements 25 and is driven by an outer shaft 26. The regrind is fed in via a feed hopper 13.

Die Drehzahlen der Wellen 8ʹ und 26 können unter­schiedlich gewählt werden. Möglich ist auch, daß die äußere Trommel 24 mit den Prallelementen 25 feststehend angeordnet wird und lediglich der Mahlgut-Aufgabeteller 9ʹ angetrieben ist.The speeds of the shafts 8ʹ and 26 can be selected differently. It is also possible that the outer drum 24 with the impact elements 25 is arranged stationary and only the regrind feed plate 9eller is driven.

Auch bei dem in Fig.3 dargestellten Ausführungs­beispiel erfolgt damit eine wirksame Auflösung der in der Walzenmühle 1 gebildeten Agglomerate vor Eintrag des Mahlgutes in den Sichtraum 21 des Sichters 2.In the embodiment shown in FIG. 3, too, the agglomerates formed in the roller mill 1 are effectively dissolved before the ground material is introduced into the classifying chamber 21 of the classifier 2.

Claims (4)

1. Anlage zur Zerkleinerung von sprödem Mahlgut, enthaltend a) eine Walzenmühle, in der das Mahlgut unter Anwendung hohen Druckes und Bildung von Agglomeraten einer Einzelkornzerkleinerung und einer Gutbettzerkleinerung unterworfen wird, b) einen der Walzenmühle (1)nachgeschalteten Sichter (2), in dem wenigstens ein rotieren­des Sichtorgan (7) angeordnet ist, c) eine Einrichtung (9, 10, 11) zur Auflösung von in der Walzenmühle gebildeten Agglome­raten im Sichter (2) im Bereich der Gutauf­gabe, d) eine Mahlstufe (3) zur weiteren Zerkleine­rung der bei der Sichtung anfallenden Grieße,
dadurch gekennzeichnet, daß
 e) die Einrichtung zur Auflösung von Agglome­raten durch einen mit Prallelementen (10, 11) besetzten, rotierenden Mahlgut-Aufga­beteller (9) gebildet ist, der unabhängig vom Sichtorgan (7) angetrieben ist. 1. Plant for crushing brittle regrind containing a) a roller mill in which the ground material is subjected to single grain size reduction and material bed size reduction using high pressure and the formation of agglomerates, b) a separator (2) arranged downstream of the roller mill (1), in which at least one rotating viewing element (7) is arranged, c) a device (9, 10, 11) for dissolving agglomerates formed in the roller mill in the classifier (2) in the area of the good feed, d) a grinding stage (3) for further comminution of the semolina resulting from the screening,
characterized in that
e) the device for dissolving agglomerates is formed by a rotating regrind feed plate (9) which is filled with impact elements (10, 11) and which is driven independently of the viewing element (7). 2. Anlage nach Anspruch 1, dadurch gekennzeichnet, daß der Mahlgut-Aufgabeteller (9) mit Prallele­menten (10, 11) unterschiedlicher Höhe besetzt ist.2. Plant according to claim 1, characterized in that the regrind feed plate (9) with baffle elements (10, 11) is occupied at different heights. 3. Anlage nach Anspruch 1, dadurch gekennzeichnet, daß der an seinem Umfang mit Prallelementen (10ʹ) besetzte Mahlgut-Aufgabeteller (9ʹ) über eine Kernwelle (8ʹ) angetrieben und innerhalb einer an ihrem Umfang mit Prallelementen (25) besetzten Trommel (24) angeordnet ist.3. Plant according to claim 1, characterized in that the regrind feed plate (9ʹ) on its circumference with impact elements (10ʹ) is driven by a core shaft (8ʹ) and within a drum (24) on its circumference with impact elements (25). is arranged. 4. Anlage nach Anspruch 1, dadurch gekennzeichnet, daß die Mahlstufe zur weiteren Zerkleinerung der bei der Sichtung anfallenden Grieße durch eine Kugelmühle (3) gebildet wird.4. Plant according to claim 1, characterized in that the grinding stage for further comminution of the semolina resulting from the screening is formed by a ball mill (3).
EP86117585A 1986-03-19 1986-12-17 Comminuting plant for brittle material Expired - Lifetime EP0237641B1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE19863609229 DE3609229A1 (en) 1986-03-19 1986-03-19 METHOD AND SYSTEM FOR CRUSHING SPROEDEM GROUND MATERIAL
DE3609229 1986-03-19

Publications (3)

Publication Number Publication Date
EP0237641A2 true EP0237641A2 (en) 1987-09-23
EP0237641A3 EP0237641A3 (en) 1988-07-27
EP0237641B1 EP0237641B1 (en) 1990-08-29

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ID=6296762

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EP86117585A Expired - Lifetime EP0237641B1 (en) 1986-03-19 1986-12-17 Comminuting plant for brittle material

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Country Link
US (1) US4732334A (en)
EP (1) EP0237641B1 (en)
DE (2) DE3609229A1 (en)
ES (1) ES2017626B3 (en)

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0374491A2 (en) * 1988-12-22 1990-06-27 Krupp Polysius Ag Sifter
WO1992009376A1 (en) * 1990-11-26 1992-06-11 F.L. Smidth & Co. A/S Double separator for sorting particulate material
DE4124416A1 (en) * 1991-07-23 1993-01-28 Krupp Polysius Ag DEVICE AND METHOD FOR CRUSHING GROUND DIFFERENT GRAIN
US5458245A (en) * 1992-10-20 1995-10-17 Buhler Gmbh Device for cleaning a mixture of substantially granular grains and method for cleaning this mixture of grains

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DE3712147A1 (en) * 1987-04-10 1988-10-20 Krupp Polysius Ag METHOD AND SYSTEM FOR CRUSHING SPROEDEM GROUND MATERIAL
DE3815217A1 (en) * 1988-05-04 1989-11-16 Pfeiffer Christian Maschf METHOD FOR CRUSHING SPROEDEM GROUND
DE3822729A1 (en) * 1988-07-05 1990-01-11 Krupp Polysius Ag PLANT FOR SHREDDING SPROEDEM GROUND
DD298600A5 (en) * 1989-09-15 1992-03-05 Forschungsinstitut Fuer Aufbereitung,De TUBE BALL MILLS FOR EFFECTIVE DESAGGLOMERATION AND CRUSHING OF HIGH PRESSURE CRUSHED SPROEDEN MATERIAL
DE4005323A1 (en) * 1990-02-20 1991-08-22 Krupp Polysius Ag Crushing plant for cement material - involves first stage accepting pre-crushed material, and feeding to second stage with constant output regulation
BRPI1004773B1 (en) * 2010-11-22 2020-12-08 Edinez Bilk silo for separating gravel sand from powdery material

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Cited By (6)

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Publication number Priority date Publication date Assignee Title
EP0374491A2 (en) * 1988-12-22 1990-06-27 Krupp Polysius Ag Sifter
EP0374491A3 (en) * 1988-12-22 1991-12-11 Krupp Polysius Ag Sifter
WO1992009376A1 (en) * 1990-11-26 1992-06-11 F.L. Smidth & Co. A/S Double separator for sorting particulate material
TR25513A (en) * 1990-11-26 1993-05-01 Smidth & Co As F L DOUBLE-LAYED SEPARATOR (SEPARATOR) FOR CLASSIFICATION OF GRAINED MATERIALS
DE4124416A1 (en) * 1991-07-23 1993-01-28 Krupp Polysius Ag DEVICE AND METHOD FOR CRUSHING GROUND DIFFERENT GRAIN
US5458245A (en) * 1992-10-20 1995-10-17 Buhler Gmbh Device for cleaning a mixture of substantially granular grains and method for cleaning this mixture of grains

Also Published As

Publication number Publication date
DE3609229A1 (en) 1987-09-24
EP0237641B1 (en) 1990-08-29
ES2017626B3 (en) 1991-03-01
DE3673808D1 (en) 1990-10-04
US4732334A (en) 1988-03-22
EP0237641A3 (en) 1988-07-27

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