EP0783374A1 - Tumbling mill - Google Patents

Tumbling mill

Info

Publication number
EP0783374A1
EP0783374A1 EP95931152A EP95931152A EP0783374A1 EP 0783374 A1 EP0783374 A1 EP 0783374A1 EP 95931152 A EP95931152 A EP 95931152A EP 95931152 A EP95931152 A EP 95931152A EP 0783374 A1 EP0783374 A1 EP 0783374A1
Authority
EP
European Patent Office
Prior art keywords
drum mill
grinding chamber
loading
ball valves
unloading opening
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.)
Withdrawn
Application number
EP95931152A
Other languages
German (de)
French (fr)
Inventor
Johann Lisson
Manfred Adelmann
Kurt Gruber
Viktor Gliha
Horst Schwarz
Helmut Bierwirth
Thomas König
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.)
Siemens AG
Original Assignee
Siemens AG
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Siemens AG filed Critical Siemens AG
Publication of EP0783374A1 publication Critical patent/EP0783374A1/en
Withdrawn legal-status Critical Current

Links

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
    • B02C17/183—Feeding or discharging devices

Definitions

  • the invention relates to a drum mill with an at least approximately cylindrical grinding chamber and a feed container having a loading and unloading opening.
  • Milling process of a powdery medium as well as an agglomeration or assembly process of the powdery medium following the milling process may be necessary.
  • a drum mill with a generally cylindrical grinding chamber can be used to grind powdery media.
  • Such a drum mill is known, for example, from the publication "Preparation of Solid Mineral Raw Materials", H. Schubert, Vol. 1, VEB German Publisher for Basic Industry für (1975), pp. 147 ff.
  • the particle size of the particles of the medium can be reduced from, for example, approximately 500 ⁇ m to, for example, less than 1 ⁇ m.
  • a possibly subsequent agglomeration process which can facilitate the further processing of the medium, can lead to a concentration of the finely ground
  • the grinding chamber can also be used to carry out the agglomeration process.
  • a storage container in addition to the cylindrical grinding chamber, can be provided, the interior of which is connected to the grinding chamber by a number of through openings.
  • the storage container then has a loading and unloading opening.
  • toxic or radioactive substances used in manufacturing Such a drum mill is not suitable for nuclear fuel elements, however, since the required tightness, in particular of the loading and unloading opening and of the through openings, cannot be guaranteed.
  • the invention is therefore based on the object of designing a drum mill of the type mentioned above in such a way that it is also suitable for handling toxic and / or radioactive substances.
  • This object is achieved according to the invention for a drum mill of the type mentioned above in that both the loading and unloading opening and a number of through openings connecting the interior of the storage container to the grinding chamber can be blocked off with ball valves.
  • a ball valve has a high level of tightness with regard to the leakage of powdered medium, so that unintentional release of the powdered medium to the environment is reliably avoided.
  • the use of the ball valves thus turns the drum mill into a closed system that is particularly suitable for carrying out the grinding processes and the agglomeration process. Due to the use of ball valves, there are no internals disturbing the agglomeration process in the interior of the storage container.
  • the drum mill is pivotally mounted about a horizontal axis that is perpendicular to the main axis of the grinding chamber and is provided with a pivoting drive.
  • a drive device which is common to all ball valves is provided and which, in a first position of the drum mill, has a first drive shaft is detachably connected to the ball valve of the loading and unloading opening, and which in a second position of the drum mill rotated with respect to the first position by an angle around the main axis of the grinding chamber with a second drive shaft common to all ball valves of the through openings is detachably connected.
  • the storage container and the grinding chamber are advantageously arranged within a sealed housing that completely surrounds them, both the drives of the drum mill and the drive device common to the ball valves being arranged outside the housing.
  • a drum mill designed in this way is particularly suitable for handling toxic and / or radioactive materials.
  • the figure shows a drum mill.
  • a drum mill 1 according to the figure comprises a cylindrical grinding chamber 2 and a storage container 3.
  • the storage container 3 has a loading and unloading opening 4.
  • the interior space of the reservoir 3 is connected through through openings 5 with the grinding chamber 2.
  • the loading and unloading opening 4 and the passage openings 5 can be shut off with ball valves 6 and 7, respectively.
  • the cylindrical grinding chamber 2 rotates about its main axis H.
  • the drum mill 1 is mounted in a swivel frame 8 so as to be pivotable about a horizontal axis S which is perpendicular to the main axis H of the grinding chamber 2. As a result, the drum mill 1 can be brought into different positions by means of a rotary drive (not described in more detail).
  • a rotary drive not described in more detail.
  • the storage container 3 In a first position, in which the main axis H of the grinding chamber 2 points upwards in the vertical direction, so that the storage container 3 is located above the grinding chamber 2, the storage container 3 can be opened with the ball valve 6 and closed ball valves 7 be filled.
  • the storage container In a second position, in which the axis H compared to the first position e.g. is inclined by 45 °, with the ball valve 6 closed and the ball valves 7 open, the storage container can be emptied into the grinding chamber.
  • the drum mill 1 therefore expediently has at least two through openings 5, so that complete emptying of the storage container 3 into the grinding chamber 2 is ensured.
  • the grinding process is provided when the ball valves 6 and 7 are closed.
  • the drum mill 1 is also suitable for carrying out an agglomeration process in the storage container 3, it being possible for a binding agent to be fed through the loading and unloading opening 4.
  • the grinding chamber 2 can be emptied into the storage container 3 with the ball valves 7 open and the ball valve 6 closed.
  • a fifth position in which the axis H points downwards in the vertical direction, the reservoir 3 can be emptied when the ball valve 6 is open.
  • a drive device 9 is arranged on the drum mill 1.
  • the drive device 9 In a first position of the drum mill, the drive device 9 is detachably connected to the ball valve 6 of the loading and unloading opening 4 via a first drive shaft 10. In this position, the ball valve 6 can be operated mechanically by means of the drive device 9.
  • the drive device 9 In a second position of the drum mill, rotated by an angle of 180 ° about the main axis H of the grinding chamber 2 with respect to the first position, the drive device 9 is detachably connected to a second drive shaft 11 common to all ball valves 7 of the through openings 5 . In this position, the ball valves 7 can be operated mechanically.
  • the grinding chamber 2 and the feed container 3 of the drum mill 1 are arranged within a tight housing 12 completely surrounding them. Both the drives of the drum mill 13 and the drive device 9 are arranged outside of the housing 12. This ensures a high level of tightness of the drum mill with a high level of maintenance friendliness. To further increase the tightness of the drum mill 1, the volume enclosed by the housing 12 can be under negative pressure. By arranging the required drive units 9, 13 outside the housing 12, the heat accumulation inside the housing 12 is also kept particularly low.
  • Bellows seals 14 are provided for compensation and simultaneous sealing of thermal expansions of the drum mill 1 which inevitably occur during a grinding process and of displacements due to loading.

Landscapes

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

Abstract

The invention concerns a tumbling mill (1) with an at least approximately cylindrical grinding vessel (2) and a feed vessel (3) with a loading/unloading port (4). In order to ensure that the mill is sufficiently well sealed for use with toxic and/or radioactive materials, the invention calls for both the loading/unloading port (4) and a number of ducts (5) connecting the interior of the feed vessel (5) with the grinding vessel (2) to be fitted with ball valves (6, 7).

Description

1 Beschreibung 1 description
TrommelmühleDrum mill
Die Erfindung bezieht sich auf eine Trommelmühle mit einem mindestens annähernd zylinderförmigen Mahlraum und einem eine Be- und Entladeöffnung aufweisenden Vorlagebehälter.The invention relates to a drum mill with an at least approximately cylindrical grinding chamber and a feed container having a loading and unloading opening.
Im Verlauf eines Herstellungsprozesses chemischer Verbindun- gen, zum Beispiel von Sintermaterialien, kann sowohl einIn the course of a manufacturing process of chemical compounds, for example sintered materials, both can
Mahlvorgang eines pulverförmigen Mediums als auch ein sich an den Mahlvorgang anschließender Agglomerations- oder Zusammen¬ bailungs-Vorgang des pulverförmigen Mediums erforderlich sein. Zum Mahlen pulverförmiger Medien kann eine Trommelmühle mit einem in der Regel zylindrischen Mahlraum eingesetzt wer¬ den. Eine derartige Trommelmühle ist beispielsweise aus der Druckschrift "Aufbereitung fester mineralischer Rohstoffe", H. Schubert, Bd. 1, VEB Deutscher Verlag für Grundstoffindu¬ strie Leipzig (1975), S. 147 ff, bekannt. Durch das Mahlen eines pulverförmigen Mediums mittels einer Trommelmühle kann die Korngröße der Partikel des Mediums von beispielsweise et¬ wa 500 μ auf beispielsweise weniger als 1 um reduziert wer¬ den. Ein sich möglicherweise anschließender Agglomerations- Vorgang, der die Weiterverarbeitung des Mediums erleichtern kann, kann eine Zusammenballung der feinkörnig gemahlenenMilling process of a powdery medium as well as an agglomeration or assembly process of the powdery medium following the milling process may be necessary. A drum mill with a generally cylindrical grinding chamber can be used to grind powdery media. Such a drum mill is known, for example, from the publication "Preparation of Solid Mineral Raw Materials", H. Schubert, Vol. 1, VEB German Publisher for Basic Industry Leipzig (1975), pp. 147 ff. By grinding a powdery medium by means of a drum mill, the particle size of the particles of the medium can be reduced from, for example, approximately 500 μm to, for example, less than 1 μm. A possibly subsequent agglomeration process, which can facilitate the further processing of the medium, can lead to a concentration of the finely ground
Partikel zu Kügelchen einer Größe von beispielsweise einigen hundert μm bewirken. Dabei kann in einer Ausgestaltung der Trommelmühle der Mahlraum auch zur Durchführung des Agglome¬ rations-Vorgangs dienen.Particles to spheres of a size of, for example, a few hundred microns. In one embodiment of the drum mill, the grinding chamber can also be used to carry out the agglomeration process.
Um den Mahlvorgang vom Agglomerations-Vorgang räumlich zu trennen, kann in einer alternativen Ausgestaltung zusätzlich zu dem zylindrischen Mahlraum ein Vorlagebehälter vorgesehen sein, dessen Innenraum mit dem Mahlraum durch eine Anzahl von Durchgangsöffnungen verbunden ist. Der Vorlagebehälter weist dann eine Be- und Entladeöffnung auf. Für den Umgang mit to¬ xischen oder radioaktiven Stoffen, die bei der Herstellung von nuklearen Brennelementen benötigt werden, ist eine derar¬ tige Trommelmühle jedoch nicht geeignet, da eine erforderli¬ che Dichtigkeit insbesondere der Be- und Entladeöffnung sowie der Durchgangsöffnungen nicht gewährleistet ist.In order to spatially separate the grinding process from the agglomeration process, in an alternative embodiment, in addition to the cylindrical grinding chamber, a storage container can be provided, the interior of which is connected to the grinding chamber by a number of through openings. The storage container then has a loading and unloading opening. For handling toxic or radioactive substances used in manufacturing Such a drum mill is not suitable for nuclear fuel elements, however, since the required tightness, in particular of the loading and unloading opening and of the through openings, cannot be guaranteed.
Der Erfindung liegt daher die Aufgabe zugrunde, eine Trommel¬ mühle der obengenannten Art derart auszubilden, daß sie auch für den Umgang mit toxischen und/oder radioaktiven Stoffen geeignet ist.The invention is therefore based on the object of designing a drum mill of the type mentioned above in such a way that it is also suitable for handling toxic and / or radioactive substances.
Diese Aufgabe wird für eine Trommelmühle der obengenannten Art erfindungsgemäß dadurch gelöst, daß sowohl die Be- und Entladeöffnung als auch eine Anzahl von den Innenraum des Vorlagebehälters mit dem Mahlraum verbindenden Durchgangsöff- nungen mit Kugelhähnen absperrbar sind.This object is achieved according to the invention for a drum mill of the type mentioned above in that both the loading and unloading opening and a number of through openings connecting the interior of the storage container to the grinding chamber can be blocked off with ball valves.
Die mit der Erfindung erzielten Vorteile bestehen insbesonde¬ re darin, daß ein Kugelhahn hinsichtlich der Leckage von pul- verförmigem Medium eine hohe Dichtigkeit aufweist, so daß ei- ne unbeabsichtigte Abgabe des pulverförmigen Mediums an die Umwelt sicher vermieden ist. Somit wird durch den Einsatz der Kugelhähne die Trommelmühle zu einem geschlossenen System, das zur Durchführung der Mahlprozesse und des Agglomerations- prozesses besonders geeignet ist. Durch den Einsatz von Ku- gelhähnen befinden sich im Innenraum des Vorlagebehälters zu¬ dem keine den Agglomerationsprozeß störenden Einbauten.The advantages achieved by the invention are, in particular, that a ball valve has a high level of tightness with regard to the leakage of powdered medium, so that unintentional release of the powdered medium to the environment is reliably avoided. The use of the ball valves thus turns the drum mill into a closed system that is particularly suitable for carrying out the grinding processes and the agglomeration process. Due to the use of ball valves, there are no internals disturbing the agglomeration process in the interior of the storage container.
In vorteilhafter Ausgestaltung ist die Trommelmühle um eine horizontale, auf der Hauptachse des Mahlraums senkrecht ste- hende Achse schwenkbar gelagert und mit einem Schwenkantrieb versehen. Dadurch ist sowohl das Be- als auch das Entladen des Mahlraums aus dem bzw. in den Vorlagebehälter maschinell möglich und automatisierbar.In an advantageous embodiment, the drum mill is pivotally mounted about a horizontal axis that is perpendicular to the main axis of the grinding chamber and is provided with a pivoting drive. As a result, both the loading and the unloading of the grinding chamber from or into the storage container is mechanically possible and can be automated.
In weiterer zweckmäßiger Ausgestaltung ist eine allen Kugel¬ hähnen gemeinsame Antriebsvorrichtung vorgesehen, die in ei¬ ner ersten Position der Trommelmühle über eine erste An- triebswelle mit dem Kugelhahn der Be- und Entladeöffnung lös¬ bar verbunden ist, und die in einer zweiten, bezüglich auf die erste Position um einen Winkel um die Hauptachse des Mahlraums gedrehten Position der Trommelmühle mit einer zwei¬ ten, allen Kugelhähnen der Durchgangsöffnungen gemeinsamen Antriebswelle lösbar verbunden ist. Durch diese Antriebsvor¬ richtung sind alle Kugelhähne maschinell betätigbar, so daß Bedienungspersonal nicht mit den Absperrarmaturen in Kontakt treten muß.In a further expedient embodiment, a drive device which is common to all ball valves is provided and which, in a first position of the drum mill, has a first drive shaft is detachably connected to the ball valve of the loading and unloading opening, and which in a second position of the drum mill rotated with respect to the first position by an angle around the main axis of the grinding chamber with a second drive shaft common to all ball valves of the through openings is detachably connected. By means of this drive device, all ball valves can be operated mechanically, so that operating personnel do not have to come into contact with the shut-off fittings.
Zur zusätzlichen Erhöhung der Dichtigkeit der Trommelmühle sind der Vorlagebehälter und der Mahlraum vorteilhafterweise innerhalb eines diese vollständig umgebenden dichten Gehäuses angeordnet, wobei sowohl die Antriebe der Trommelmühle als auch die den Kugelhähnen gemeinsame Antriebsvorrichtung außerhalb des Gehäuses angeordnet sind.To additionally increase the tightness of the drum mill, the storage container and the grinding chamber are advantageously arranged within a sealed housing that completely surrounds them, both the drives of the drum mill and the drive device common to the ball valves being arranged outside the housing.
Zur Kompensation und gleichzeitigen Abdichtung der während der Mahlvorgänge unvermeidlichen Wärmedehnung der Trommelmüh- le sowie möglicherweise auftretender Verschiebungen durch Be¬ lastung sind Faltenbalgdichtungen vorgesehen.Bellows seals are provided to compensate and at the same time seal the thermal expansion of the drum mill that is unavoidable during the grinding processes and any displacements that may occur due to loading.
Aufgrund der erzielten hohen Dichtigkeit bezüglich Leckage des pulverförmigen Mediums an die Umwelt mittels der Kugel- hähne und aufgrund der maschinellen Bedienbarkeit der Ab¬ sperrarmaturen ist eine derartig ausgestaltete Trommelmühle für den Umgang mit toxischen und/oder radioaktiven Materia¬ lien besonders geeignet.Due to the high tightness achieved with regard to leakage of the powdery medium to the environment by means of the ball valves and due to the mechanical operability of the shut-off valves, a drum mill designed in this way is particularly suitable for handling toxic and / or radioactive materials.
Ein Ausführungsbeispiel der Erfindung wird anhand einer Zeichnung näher erläutert.An embodiment of the invention is explained in more detail with reference to a drawing.
Die Figur zeigt eine Trommelmühle.The figure shows a drum mill.
Eine Trommelmühle 1 gemäß der Figur umfaßt einen zylindri¬ schen Mahlraum 2 und einen Vorlagebehälter 3. Der Vorlagebe¬ hälter 3 weist eine Be- und Entladeöffnung 4 auf. Der Innen- räum des Vorlagebehälters 3 ist durch Durchgangsöffnungen 5 mit dem Mahlraum 2 verbunden. Die Be- und Entladeöffnung 4 sowie die Durchgangsόffnungen 5 sind mit Kugelhähnen 6 bzw. 7 absperrbar. Während eines Mahlvorgangs rotiert der zylindri- sehe Mahlraum 2 um dessen Hauptachse H.A drum mill 1 according to the figure comprises a cylindrical grinding chamber 2 and a storage container 3. The storage container 3 has a loading and unloading opening 4. The interior space of the reservoir 3 is connected through through openings 5 with the grinding chamber 2. The loading and unloading opening 4 and the passage openings 5 can be shut off with ball valves 6 and 7, respectively. During a grinding process, the cylindrical grinding chamber 2 rotates about its main axis H.
Die Trommelmühle 1 ist in einem Schwenkrahmen 8 um eine hori¬ zontale, auf der Hauptachse H des Mahlraums 2 senkrecht ste¬ hende Achse S schwenkbar gelagert. Dadurch kann die Trommel- mühle 1 mittels eines nicht näher bezeichneten Schwenkan¬ triebs in verschiedene Stellungen gebracht werden. In einer ersten Stellung, in der die Hauptachse H des Mahlraums 2 in vertikaler Richtung nach oben weist, so daß der Vorlagebehäl¬ ter 3 sich oberhalb des Mahlraums 2 befindet, kann der Vorla- gebehälter 3 bei geöffnetem Kugelhahn 6 und geschlossenen Ku¬ gelhähnen 7 befüllt werden.The drum mill 1 is mounted in a swivel frame 8 so as to be pivotable about a horizontal axis S which is perpendicular to the main axis H of the grinding chamber 2. As a result, the drum mill 1 can be brought into different positions by means of a rotary drive (not described in more detail). In a first position, in which the main axis H of the grinding chamber 2 points upwards in the vertical direction, so that the storage container 3 is located above the grinding chamber 2, the storage container 3 can be opened with the ball valve 6 and closed ball valves 7 be filled.
In einer zweiten Stellung, in der die Achse H im Vergleich zur ersten Stellung z.B. um 45° geneigt ist, kann bei ge- schlossenem Kugelhahn 6 und geöffneten Kugelhähnen 7 der Vor¬ lagebehälter in den Mahlraum entleert werden. Die Trommel¬ mühle 1 weist daher zweckmäßigerweise mindestens zwei Durch¬ gangsöffnungen 5 auf, so daß eine vollständige Entleerung des Vorlagebehälters 3 in den Mahlraum 2 gewährleistet ist.In a second position, in which the axis H compared to the first position e.g. is inclined by 45 °, with the ball valve 6 closed and the ball valves 7 open, the storage container can be emptied into the grinding chamber. The drum mill 1 therefore expediently has at least two through openings 5, so that complete emptying of the storage container 3 into the grinding chamber 2 is ensured.
In einer dritten Stellung, in der die Achse H in horizontale Richtung weist, ist bei geschlossenen Kugelhähnen 6 und 7 der Mahlvorgang vorgesehen. In dieser dritten Stellung ist die Trommelmühle 1 auch für die Durchführung eines Agglomerati- onsvorgangs im Vorlagebehälter 3 geeignet, wobei ein Binde¬ mittel durch die Be- und Entladeöffnung 4 zugeführt werden kann.In a third position, in which the axis H points in the horizontal direction, the grinding process is provided when the ball valves 6 and 7 are closed. In this third position, the drum mill 1 is also suitable for carrying out an agglomeration process in the storage container 3, it being possible for a binding agent to be fed through the loading and unloading opening 4.
In einer vierten Stellung, in der die Achse H im Vergleich zur dritten Stellung z.B. um 45° nach unten geneigt ist, kann der Mahlraum 2 bei geöffneten Kugelhähnen 7 und geschlossenem Kugelhahn 6 in den Vorlagebehälter 3 entleert werden. In einer fünften Stellung, in der die Achse H in vertikaler Richtung nach unten weist, kann bei geöffnetem Kugelhahn 6 der Vorlagebehälter 3 entleert werden.In a fourth position, in which the axis H is inclined downward, for example by 45 ° compared to the third position, the grinding chamber 2 can be emptied into the storage container 3 with the ball valves 7 open and the ball valve 6 closed. In a fifth position, in which the axis H points downwards in the vertical direction, the reservoir 3 can be emptied when the ball valve 6 is open.
An der Trommelmühle 1 ist eine Antriebsvorrichtung 9 angeord¬ net. In einer ersten Position der Trommelmühle ist die An¬ triebsvorrichtung 9 über eine erste Antriebswelle 10 mit dem Kugelhahn 6 der Be- und Entladeöffnung 4 lösbar verbunden. In dieser Position kann der Kugelhahn 6 mittels der Antriebsvor¬ richtung 9 maschinell betätigt werden. In einer zweiten, be¬ züglich der ersten Position um einen Winkel von 180° um die Hauptachse H des Mahlraums 2 gedrehten Position der Trommel¬ mühle ist die Antriebsvorrichtung 9 mit einer zweiten, allen Kugelhähnen 7 der Durchgangsöffnungen 5 gemeinsamen Antriebs¬ welle 11 lösbar verbunden. In dieser Position sind die Kugel¬ hähne 7 maschinell betätigbar.A drive device 9 is arranged on the drum mill 1. In a first position of the drum mill, the drive device 9 is detachably connected to the ball valve 6 of the loading and unloading opening 4 via a first drive shaft 10. In this position, the ball valve 6 can be operated mechanically by means of the drive device 9. In a second position of the drum mill, rotated by an angle of 180 ° about the main axis H of the grinding chamber 2 with respect to the first position, the drive device 9 is detachably connected to a second drive shaft 11 common to all ball valves 7 of the through openings 5 . In this position, the ball valves 7 can be operated mechanically.
Der Mahlraum 2 und der Vorlagebehälter 3 der Trommelmühle 1 sind innerhalb eines diese vollständig umgebenden dichten Ge¬ häuses 12 angeordnet. Sowohl die Antriebe der Trommelmühle 13 als auch die Antriebsvorrichtung 9 sind außerhalb des Gehäu¬ ses 12 angeordnet. Dadurch wird eine hohe Dichtigkeit der Trommelmühle bei gleichzeitig hoher Wartungsfreundlichkeit erreicht. Zur weiteren Erhöhung der Dichtigkeit der Trommel¬ mühle 1 kann das vom Gehäuse 12 umschlossene Volumen unter Unterdruck stehen. Durch die Anordnung der erforderlichen An¬ triebseinheiten 9, 13 außerhalb des Gehäuses 12 wird zudem der Wärmeanfall innerhalb des Gehäuses 12 besonders gering gehalten.The grinding chamber 2 and the feed container 3 of the drum mill 1 are arranged within a tight housing 12 completely surrounding them. Both the drives of the drum mill 13 and the drive device 9 are arranged outside of the housing 12. This ensures a high level of tightness of the drum mill with a high level of maintenance friendliness. To further increase the tightness of the drum mill 1, the volume enclosed by the housing 12 can be under negative pressure. By arranging the required drive units 9, 13 outside the housing 12, the heat accumulation inside the housing 12 is also kept particularly low.
Zur Kompensation und gleichzeitigen Abdichtung von während eines Mahlvorgangs unvermeidbar auftretenden Wärmedehnungen der Trommelmühle 1 sowie von Verschiebungen durch Belastung sind Faltenbalgdichtungen 14 vorgesehen. Bellows seals 14 are provided for compensation and simultaneous sealing of thermal expansions of the drum mill 1 which inevitably occur during a grinding process and of displacements due to loading.

Claims

Patentansprüche claims
1. Trommelmühle (1) mit einem mindestens annähernd zylinder- fόrmigen Mahlraum (2) und einem eine Be- und Entladeöffnung (4) aufweisenden Vorlagebehälter (3), d a d u r c h g e k e n n z e i c h n e t , daß sowohl die Be- und Entladeöffnung (4) als auch eine Anzahl von den Innenraum des Vorlagebehälters (3) mit dem Mahlraum (2) ver¬ bindenden Durchgangsöffnungen (5) mit Kugelhähnen (6, 7) ab- sperrbar sind.1. Drum mill (1) with an at least approximately cylindrical grinding chamber (2) and a loading and unloading opening (4) having a receptacle (3), characterized in that both the loading and unloading opening (4) and a number of the through-openings (5) connecting the grinding chamber (2) to the grinding chamber (2) can be shut off with ball valves (6, 7).
2. Trommelmühle nach Anspruch 1, d a d u r c h g e k e n n z e i c h n e t , daß die Trom¬ melmühle (1) schwenkbar gelagert und mit einem Schwenkantrieb versehen ist.2. Drum mill according to claim 1, that the drum mill (1) is pivotally mounted and is provided with a swivel drive.
3. Trommelmühle nach Anspruch 1 oder 2, g e k e n n z e i c h n e t d u r c h eine den Kugelhäh¬ nen (6, 7) gemeinsame Antriebsvorrichtung (9), die in einer ersten Position der Trommelmühle (1) über eine erste An¬ triebswelle (10) mit dem Kugelhahn (6) der Be- und Entlade¬ öffnung (4) lösbar verbunden ist, und die in einer zweiten, bezüglich der ersten Position um einen Winkel um die Haupt¬ achse (H) des Mahlraums (2) gedrehten Position der Trommel- mühle (1) mit einer zweiten, den Kugelhähnen (7) der Durch¬ gangsöffnungen (5) gemeinsamen Antriebswelle (11) lösbar ver¬ bunden ist.3. Drum mill according to claim 1 or 2, characterized by a drive device (9) common to the ball valves (6, 7), which in a first position of the drum mill (1) via a first drive shaft (10) with the ball valve (6 ) of the loading and unloading opening (4) is detachably connected, and in a second position of the drum mill (1) rotated by an angle about the main axis (H) of the grinding chamber (2) with respect to the first position is releasably connected to a second drive shaft (11) common to the ball valves (7) of the through openings (5).
4. Trommelmühle nach Anspruch 3, d a d u r c h g e k e n n z e i c h n e t , daß der Mahl- rau (2) und der Vorlagebehälter (3) innerhalb eines diese vollständig umgebenden dichten Gehäuses (12) angeordnet sind, und daß sowohl deren Antriebe (13) als auch die den Kugelhäh¬ nen (6, 7) gemeinsame Antriebsvorrichtung (9) außerhalb des Gehäuses angeordnet sind. 4. Drum mill according to claim 3, characterized in that the grinding chamber (2) and the storage container (3) are arranged within a completely sealed housing (12), and that both their drives (13) and the Kugelhäh¬ NEN (6, 7) common drive device (9) are arranged outside the housing.
5. Trommelmühle nach Anspruch 4, g e k e n n z e i c h n e t d u r c h Faltenbalgdichtun- gen (14) zur Abdichtung von Getriebewellen gegen das Gehäuse (12) . 5. drum mill according to claim 4, g e k e n n z e i c h n e t d u r c h bellows seals (14) for sealing gear shafts against the housing (12).
EP95931152A 1994-09-28 1995-09-15 Tumbling mill Withdrawn EP0783374A1 (en)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
DE19944434707 DE4434707A1 (en) 1994-09-28 1994-09-28 Drum mill
DE4434707 1994-09-28
PCT/DE1995/001282 WO1996009894A1 (en) 1994-09-28 1995-09-15 Tumbling mill

Publications (1)

Publication Number Publication Date
EP0783374A1 true EP0783374A1 (en) 1997-07-16

Family

ID=6529444

Family Applications (1)

Application Number Title Priority Date Filing Date
EP95931152A Withdrawn EP0783374A1 (en) 1994-09-28 1995-09-15 Tumbling mill

Country Status (3)

Country Link
EP (1) EP0783374A1 (en)
DE (1) DE4434707A1 (en)
WO (1) WO1996009894A1 (en)

Family Cites Families (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE509214C (en) * 1930-02-04 1930-10-06 Fried Krupp Grusonwerk Akt Ges Chimney closure arranged on the drum circumference of ball mills
DE3230039C2 (en) * 1982-08-12 1984-11-08 Alkem Gmbh, 6450 Hanau Apparatus for treating a granular substance, in particular nuclear reactor fuel in powder form, and a method for operating the apparatus
US4887773A (en) * 1986-10-27 1989-12-19 Inco Alloys International, Inc. Rotary mill with charging system
JPH0651128B2 (en) * 1987-05-21 1994-07-06 動力炉・核燃料開発事業団 Powder take-out mechanism in powder crushing / mixing machine
JPH06134330A (en) * 1992-10-20 1994-05-17 Makino:Kk Ball mill

Non-Patent Citations (3)

* Cited by examiner, † Cited by third party
Title
134330 (MAKINO:KK) 17.Mai 1994, *
PATENT ABSTRACTS OF JAPAN vol. 018 no. 437 (C-1238) ,16.August 1994 & JP,A,06 *
See also references of WO9609894A1 *

Also Published As

Publication number Publication date
DE4434707A1 (en) 1996-04-04
WO1996009894A1 (en) 1996-04-04

Similar Documents

Publication Publication Date Title
EP0588070B1 (en) Safety filling and emptying nozzle for liquid, viscous or powdery materials
DE69427944T2 (en) MIXER ARRANGEMENTS
DE2604152A1 (en) SHUT-OFF VALVE
DE2824305C2 (en) Device for shutting off gas pipes with large cross-sections
DE19504540A1 (en) Feeding or emptying appts. for milling machine producing fine powders
EP2391454A1 (en) Laboratory grinder having rotary lead-throughs for grinding beakers to be provided with a medium
EP0171774B1 (en) Method for loading fuel rods in containers, apparatus for carrying out the method and container for storing fuel rods
EP0783374A1 (en) Tumbling mill
WO2011020672A1 (en) Valve for interrupting a flow path in a substantially gas-tight manner
EP2666532B2 (en) Filter unit for a barrier system
EP0100989B1 (en) Apparatus for treating granular substances, especially a powdery nuclear reactor combustible, and operating process for the apparatus
DE2746391A1 (en) LOADING / UNLOADING DEVICE FOR FUEL ELEMENT BUNDLES FOR NUCLEAR REACTORS
DE2637859A1 (en) DEVICE FOR CONCRETING RADIOACTIVE WASTE IN WASTE BARREL
DE102006049286B3 (en) Locking system for e.g. closing flap, has coupling units provided at one of connection units and drive shaft, and coupled with one another or decoupled through displacement of carrier of rotating device
EP0408939B1 (en) Process and apparatus for sampling the air of the containment of a nuclear power station
EP1793150B1 (en) Shut-off device, in particular for pressure conduits
DE3023356C2 (en) Blow conveyor for underground operations
DE2650884A1 (en) REACTION COLUMN FOR ADSORPTION AND REPLACEMENT RESINS
CH618039A5 (en) Method for embedding radioactive waste in concrete
DE3009730C2 (en) Flange connection between individually lockable pipelines
DE29522322U1 (en) Safety valve arrangement for use on pressure maintenance systems in power plants
DE10103260A1 (en) Pressure relief system for mixer containers, in particular cylindrical container mixers for powder, semolina and / or granular materials
DE3827684A1 (en) RADIATION PROTECTION CONTAINER FOR RADIOACTIVE SUBSTANCES
DE896280C (en) Rotary valve with sealing closures provided on both sides of the valve body
CH663107A5 (en) TRANSPORT AND SHIELD CONTAINER FOR CHILLERS WITH HIGH RADIOACTIVE WASTE.

Legal Events

Date Code Title Description
PUAI Public reference made under article 153(3) epc to a published international application that has entered the european phase

Free format text: ORIGINAL CODE: 0009012

17P Request for examination filed

Effective date: 19961204

AK Designated contracting states

Kind code of ref document: A1

Designated state(s): DE FR GB

GRAG Despatch of communication of intention to grant

Free format text: ORIGINAL CODE: EPIDOS AGRA

17Q First examination report despatched

Effective date: 19971217

STAA Information on the status of an ep patent application or granted ep patent

Free format text: STATUS: THE APPLICATION IS DEEMED TO BE WITHDRAWN

18D Application deemed to be withdrawn

Effective date: 19980401