EP1040872B1 - Tube mill - Google Patents

Tube mill Download PDF

Info

Publication number
EP1040872B1
EP1040872B1 EP00106197A EP00106197A EP1040872B1 EP 1040872 B1 EP1040872 B1 EP 1040872B1 EP 00106197 A EP00106197 A EP 00106197A EP 00106197 A EP00106197 A EP 00106197A EP 1040872 B1 EP1040872 B1 EP 1040872B1
Authority
EP
European Patent Office
Prior art keywords
milling
tube
tube mill
screening
mill
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired - Lifetime
Application number
EP00106197A
Other languages
German (de)
French (fr)
Other versions
EP1040872A1 (en
Inventor
Siegfried Strasser
Franz Göddecke
Albert Süssegger
Alexander Hagedorn
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.)
KHD Humboldt Wedag AG
Original Assignee
KHD Humboldt Wedag 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 KHD Humboldt Wedag AG filed Critical KHD Humboldt Wedag AG
Publication of EP1040872A1 publication Critical patent/EP1040872A1/en
Application granted granted Critical
Publication of EP1040872B1 publication Critical patent/EP1040872B1/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

Links

Images

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
    • B02C17/18—Details
    • B02C17/183—Feeding or discharging devices
    • B02C17/1835—Discharging devices combined with sorting or separating of material
    • B02C17/184—Discharging devices combined with sorting or separating of material with separator arranged in discharge path of crushing zone
    • B02C17/1845—Discharging devices combined with sorting or separating of material with separator arranged in discharge path of crushing zone with return of oversize material to crushing zone
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B02—CRUSHING, PULVERISING, OR DISINTEGRATING; PREPARATORY TREATMENT OF GRAIN FOR MILLING
    • B02C—CRUSHING, PULVERISING, OR DISINTEGRATING IN GENERAL; MILLING GRAIN
    • B02C17/00—Disintegrating by tumbling mills, i.e. mills having a container charged with the material to be disintegrated with or without special disintegrating members such as pebbles or balls
    • B02C17/18—Details
    • B02C17/183—Feeding or discharging devices
    • B02C17/186—Adding fluid, other than for crushing by fluid energy
    • B02C17/1875—Adding fluid, other than for crushing by fluid energy passing gas through crushing zone
    • B02C17/189—Adding fluid, other than for crushing by fluid energy passing gas through crushing zone with return of oversize material to crushing zone

Definitions

  • the invention relates to a tube mill with a rotatably mounted mill tube with a Mahlgutiergabeende and a Mahlgutaustragsende, which is umhaust of a Gutausfallgephinuse for discharging the milled material and possibly the mill gas.
  • a tube mill is already known from the publication EP-B-0184326.
  • Tube mills are used for crushing or grinding of ground material, which is transported in the rotating mill tube from Mahlgutaufgabeende Mahlgutaustragsende usually with the use of a mill air or a drying gas and usually with the help of located in the mill tube grinding media such.
  • B. steel balls is ground, so that one speaks of air flow mills, ball mills, etc. It is known (EP-B-0184326) to arrange a discharge cone at Mahlgutaustragsende a tube mill, which has distributed around the circumference openings for the discharge of the ground material and the mill gas.
  • the Mahlgut- and Mühlengas discharge openings of a stationary Gutausfallgephase umhaust in which the ground Good falls down, is discharged below and is usually transported by a bucket elevator to a downstream classifier, while loaded with ultrafine grain gas above from the stationary Gutausfallgephase deducted and also fed to a classifier.
  • the reformerrobgut (Grnitee) separated from the classifier is recirculated to the Mahlgutaufgabeende the tube mill.
  • the tube mill and the previously necessary So at least one external classifier so form a Kreislaufmahlstrom, which is relatively expensive built together with the necessary conveyors such as bucket elevators.
  • the invention has for its object to make a tube mill so that with her with little mechanical effort a simple and compact built Kreislaufmahl boots can be created, which can handle even higher Gutniklaufraten without large operating costs.
  • Characteristic of the tube mill according to the invention is that the Gutausfallgeophuse is not a stationary completely stationary component, but the Gutausfallgeophuse consists of two spaced fixed non-rotating side end walls, between which a rotatably mounted and rotatable by a rotary drive material conveying ring is arranged.
  • This rotatably mounted material conveying ring of the Gutgutfallgeophuses surrounding the Mahlgut- and Mühlengas-discharge openings rotates with eg about 40 - 80% of the critical speed, ie the Material philosophicalring takes at least a portion of Mühlenaustragsgutes to before or after the upper vertex of the ring and leaves this Gut material fall from top to bottom, in an integrated viewing space, which is formed in the space between the at least one Mahlgutaustragsö réelle the mill tube and the rotatably mounted material conveying ring between the two fixed Gutausfallgeophside end walls. It would also be possible the material conveyor ring to turn faster and strip the material by means of scrapers from the ring inner wall.
  • the sighting space integrated in the rotatable material conveying ring is in communication with a visible air inlet opening, a classifying air and classifying fines discharge opening and with a sortergrobgut-discharge opening in at least one of the two side end walls.
  • the rotatably mounted material conveying ring can be arranged at least one rod basket of a dynamic classifier, wherein the rod basket axis is parallel to Mühlenrohrachse.
  • the supply of the Mühlenaustragsgutes to the integrated classifier which may be a static and / or a dynamic classifier takes place partly through the rotating material conveyor ring and partly through the mill air and / or reform Kunststoff.
  • the mill air is quantitatively lower than the sighting air required for the sighting of the mill discharge material, so that in order to support the sighting, as a rule, outside air is drawn in as visual air into the integrated sighting space.
  • a hot gas stream can also be used for the sighting.
  • the classifying material to be collected in the integrated classifying room which in the case of a dynamic classifier, for example.
  • B. collected at the periphery of the at least one rotating rod basket or separated from the prepare for the process of the integrated classifying room is recirculated via a conveyor organ in particular a Gr mane-Luft preparerinne for Mahlguteintrag the tube mill, so that a compact built Kreislaufmahl responded comes about.
  • the tube mill of Figure 1 has a rotatably mounted mill tube 10 with a Mahlgutiergabeende on the right side and a Mahlgutaustragsende on the left side. At Mahlgutaustragsende connects to the mill tube 10 a Mühlenaustragskonus 11, via which the tube mill is driven by a motor 12.
  • the material to be ground is introduced from a feed bunker 13 via a metering device 14 and via a feed chute 15 into the mill tube 10 filled with grinding media such as, for example, balls.
  • Mill air 16 is also sucked into the mill tube 10 at the Mahlgutiergabeende. When mill drying moist goods can be used as mill air 16 and a hot gas stream.
  • To the extent of the mill discharge cone 11 are arranged a plurality of openings 17 for discharging the milled material and the mill air distributed.
  • the Mühlenaustragskonus 11 with its Mahlgut- and mill air discharge openings 17 is umhaust of a Gutausfallgeophuse, which according to the invention consists of two spaced fixed non-rotating side end walls 18 and 19, between which a rotatably mounted rotatable Material concerningring 20 is arranged, the Gutausfallgepatuse at the periphery of the side end walls 18, 19 closes to the outside.
  • the material conveying ring 20 is rotatably mounted on rollers 21 and 22, and the rotation of the material conveying ring 20 via the cylindrical shell z. B. by the driven bearing roller 22.
  • the material conveying ring 20 can, as shown in the embodiment of Figure 1, on both sides of the edges of the two spaced side end walls 18, 19 engage around; However, the two edges of the ring 20 may also be disposed within the two spaced end walls 18, 19.
  • At least one rod basket 31 of a dynamic classifier is arranged according to embodiment, wherein the rod basket axis is parallel to the Mühlenrohrachse.
  • the sifting material collected at the periphery of the rotating rod basket 31 driven by the rod basket drive motor 32 is recirculated to the grinding material feed of the tube mill via a conveying member 33, in particular a grit-air conveying trough.
  • Figure 4 shows that the invention can also be used in a two-chamber tube mill with center discharge.
  • the Mahlgutaustragsö réelleen 17 of the two grinding chambers 36, 37 surrounding Gutausfallgephaseuse is arranged in the central longitudinal region, which is also composed of the two spaced fixed non-rotating side end walls 18,19 and from the rotatable Material investigatingring 20.
  • the invention is not only applicable to tube mills with central drive, but also in tube mills with other drives, eg. B. sprocket drive.

Landscapes

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

Description

Die Erfindung betrifft eine Rohrmühle mit einem drehbar gelagerten Mühlenrohr mit einem Mahlgutaufgabeende und einem Mahlgutaustragsende, das von einem Gutausfallgehäuse zum Austrag des gemahlenen Gutes sowie ggf. des Mühlengases umhaust ist. Eine solche Rohrmühle ist aus der Druckschrift EP-B-0184326 bereits bekannt.The invention relates to a tube mill with a rotatably mounted mill tube with a Mahlgutaufgabeende and a Mahlgutaustragsende, which is umhaust of a Gutausfallgehäuse for discharging the milled material and possibly the mill gas. Such a tube mill is already known from the publication EP-B-0184326.

Rohrmühlen dienen zur Zerkleinerung bzw. Mahlung von Mahlgut, das im rotierenden Mühlenrohr vom Mahlgutaufgabeende zum Mahlgutaustragsende in der Regel mit Einsatz einer Mühlenluft bzw. auch eines Trocknungsgases transportiert wird und dabei meist mit Hilfe von im Mühlenrohr befindlichen Mahlkörpern wie z. B. Stahlkugeln gemahlen wird, so daß man auch von Luftstrommühlen, Kugelmühlen etc. spricht. Bekannt ist (EP-B-0184326), am Mahlgutaustragsende einer Rohrmühle einen Austragskonus anzuordnen, der um den Umfang verteilte Öffnungen für den Austrag des Mahlgutes und des Mühlengases aufweist. Dabei sind die Mahlgut- und Mühlengas-Austragsöffnungen von einem stationären Gutausfallgehäuse umhaust, in welchem das gemahlene Gut nach unten fällt, unten ausgetragen wird und meist durch ein Becherwerk zu einem nachgeschalteten Sichter transportiert wird, während das mit Feinstkorn beladene Mühlengas oben aus dem stationären Gutausfallgehäuse abgezogen und ebenfalls einem Sichter zugeleitet wird. Das vom Sichter abgetrennte Sichtergrobgut (Grieße) wird zum Mahlgutaufgabeende der Rohrmühle rezirkuliert. Die Rohrmühle und der bisher notwendig gewesene wenigstens eine externe Sichter bilden also eine Kreislaufmahlanlage, die zusammen mit den notwendigen Fördereinrichtungen wie Becherwerke etc. relativ aufwendig gebaut ist.Tube mills are used for crushing or grinding of ground material, which is transported in the rotating mill tube from Mahlgutaufgabeende Mahlgutaustragsende usually with the use of a mill air or a drying gas and usually with the help of located in the mill tube grinding media such. B. steel balls is ground, so that one speaks of air flow mills, ball mills, etc. It is known (EP-B-0184326) to arrange a discharge cone at Mahlgutaustragsende a tube mill, which has distributed around the circumference openings for the discharge of the ground material and the mill gas. The Mahlgut- and Mühlengas discharge openings of a stationary Gutausfallgehäuse umhaust, in which the ground Good falls down, is discharged below and is usually transported by a bucket elevator to a downstream classifier, while loaded with ultrafine grain gas above from the stationary Gutausfallgehäuse deducted and also fed to a classifier. The Sichterrobgut (Grieße) separated from the classifier is recirculated to the Mahlgutaufgabeende the tube mill. The tube mill and the previously necessary So at least one external classifier so form a Kreislaufmahlanlage, which is relatively expensive built together with the necessary conveyors such as bucket elevators.

Der Erfindung liegt die Aufgabe zugrunde, eine Rohrmühle so zu gestalten, daß mit ihr mit geringem maschinellen Aufwand eine einfach und kompakt gebaute Kreislaufmahleinrichtung geschaffen werden kann, die auch höhere Gutkreislaufraten ohne große Betriebskosten bewältigen kann.The invention has for its object to make a tube mill so that with her with little mechanical effort a simple and compact built Kreislaufmahleinrichtung can be created, which can handle even higher Gutkreislaufraten without large operating costs.

Diese Aufgabe wird gemäß der Erfindung mit einer Rohrmühle und alternativ mit einer Zweikammer-Rohrmühle mit den Merkmalen des Kennzeichnungsteils des Anspruchs 1 gelöst. Vorteilhafte Ausgestaltungen der Erfindung sind in den Unteransprüchen angegeben.This object is achieved according to the invention with a tube mill and, alternatively, with a two-chamber tube mill with the features of the characterizing part of claim 1. Advantageous embodiments of the invention are specified in the subclaims.

Charakteristisch für die erfindungsgemäße Rohrmühle ist, daß deren Gutausfallgehäuse nicht ein stationäres völlig unbewegtes Bauteil ist, sondern das Gutausfallgehäuse besteht aus zwei beabstandeten feststehenden nicht rotierenden Seiten-Stirnwänden, zwischen denen ein drehbar gelagerter und durch einen Drehantrieb in Drehung versetzbarer Materialförderring angeordnet ist. Dieser drehbar gelagerte Materialförderring des die Mahlgut- und Mühlengas-Austragsöffnungen umhausenden Gutausfallgehäuses rotiert mit z.B. ca. 40 - 80 % der kritischen Drehzahl, d. h. der Materialförderring nimmt wenigstens einen Teil des Mühlenaustragsgutes bis vor bzw. nach dem oberen Scheitelpunkt des Ringes mit und läßt dieses Gutmaterial von oben nach unten fallen, und zwar in einen integrierten Sichtraum, der im Zwischenraum zwischen der wenigstens einen Mahlgutaustragsöffnung des Mühlenrohres und dem drehbar gelagerten Materialförderring zwischen den beiden feststehenden Gutausfallgehäuse-Seiten-Stirnwänden gebildet ist. Es wäre auch möglich den Materialförderring schneller drehen zu lassen und das Gutmaterial mittels Abstreifer von der Ringinnenwand abzustreifen.Characteristic of the tube mill according to the invention is that the Gutausfallgehäuse is not a stationary completely stationary component, but the Gutausfallgehäuse consists of two spaced fixed non-rotating side end walls, between which a rotatably mounted and rotatable by a rotary drive material conveying ring is arranged. This rotatably mounted material conveying ring of the Gutgutfallgehäuses surrounding the Mahlgut- and Mühlengas-discharge openings rotates with eg about 40 - 80% of the critical speed, ie the Materialförderring takes at least a portion of Mühlenaustragsgutes to before or after the upper vertex of the ring and leaves this Gut material fall from top to bottom, in an integrated viewing space, which is formed in the space between the at least one Mahlgutaustragsöffnung the mill tube and the rotatably mounted material conveying ring between the two fixed Gutausfallgehäuse-side end walls. It would also be possible the material conveyor ring to turn faster and strip the material by means of scrapers from the ring inner wall.

Zur Funktion des im drehbaren Materialförderring integrierten Sichtraums steht dieser mit einer Sichtlufteintrittsöffnung, einer Sichtluft- und Sichterfeingut-Austragsöffnung sowie mit einer Sichtergrobgut-Austragsöffnung in wenigstens einer der beiden Seiten-Stirnwände in Verbindung. Becherwerke oder andere platzbeanspruchende Förderorgane zum Transport des Mühlenaustragsgutes zum integrierten Sichter sowie der bisher immer notwendig gewesene wenigstens eine externe Sichter entfallen.For the function of the sighting space integrated in the rotatable material conveying ring, the latter is in communication with a visible air inlet opening, a classifying air and classifying fines discharge opening and with a Sichtergrobgut-discharge opening in at least one of the two side end walls. Bucket elevators or other space-consuming conveying elements for transporting the Mühlenaustragsgutes to the integrated classifier and the previously always necessary at least one external classifier omitted.

Im integrierten Sichtraum des Gutausfallgehäuses mit dem drehbar gelagerten Materialförderring kann wenigstens ein Stabkorb eines dynamischen Sichters angeordnet sein, wobei die Stabkorbachse parallel zur Mühlenrohrachse liegt. Die Zufuhr des Mühlenaustragsgutes zum integrierten Sichter, der ein statischer und/oder ein dynamischer Sichter sein kann, erfolgt zum Teil durch den rotierenden Materialförderring und zum Teil durch die Mühlenluft und/oder Sichtluft. In der Regel ist die Mühlenluft mengenmäßig geringer als die zur Sichtung des Mühlenaustragsgutes erforderliche Sichtluft, so daß zur Unterstützung der Sichtung in der Regel Außenluft als Sichtluft in den integrierten Sichtraum eingezogen wird. Bei der Mahltrocknung feuchter Güter kann zur Sichtung auch ein Heißgasstrom herangezogen werden.In the integrated viewing space of the Gutausfallgehäuses with the rotatably mounted material conveying ring can be arranged at least one rod basket of a dynamic classifier, wherein the rod basket axis is parallel to Mühlenrohrachse. The supply of the Mühlenaustragsgutes to the integrated classifier, which may be a static and / or a dynamic classifier takes place partly through the rotating material conveyor ring and partly through the mill air and / or Sichtluft. As a rule, the mill air is quantitatively lower than the sighting air required for the sighting of the mill discharge material, so that in order to support the sighting, as a rule, outside air is drawn in as visual air into the integrated sighting space. During the grinding drying of moist goods, a hot gas stream can also be used for the sighting.

Das im integrierten Sichtraum gesammelte Sichtergrobgut, das bei einem dynamischen Sichter z. B. an der Peripherie des wenigstens einen rotierenden Stabkorbs gesammelt bzw. vom Sichtluftstrom abgetrennt wird, wird über ein Förderorgan insbesondere eine Grieße-Luftförderrinne zum Mahlguteintrag der Rohrmühle rezirkuliert, so daß eine kompakt gebaute Kreislaufmahleinrichtung zustande kommt.The classifying material to be collected in the integrated classifying room, which in the case of a dynamic classifier, for example. B. collected at the periphery of the at least one rotating rod basket or separated from the Sichtluftstrom is recirculated via a conveyor organ in particular a Grieße-Luftförderrinne for Mahlguteintrag the tube mill, so that a compact built Kreislaufmahleinrichtung comes about.

Von dem im Gutausfallgehäuse integrierten Sichtraum geht durch eine Öffnung in wenigstens einer der beiden Gutausfallgehäuse-Seiten-Stirnwände eine Leitung zum Abzug der mit Sichterfeingut beladenen Sichtluft ab, die zu einem Abscheider zur Abtrennung des Feingutes von der Sichtluft führt.From the built-in Gutausfallgehäuse showroom goes through an opening in at least one of the two Gutausfallgehäuse-side end walls from a line to deduct the Sichterfeingut laden Sichtluft, which leads to a separator for separating the fine material from the Sichtluft.

Die Erfindung und deren weitere Merkmale und Vorteile werden anhand des in den Figuren schematisch dargestellten Ausführungsbeispieles näher erläutert. Es zeigt:

Figur 1:
In Seitenansicht, teilweise im Vertikalschnitt, die erfindungsgemäße Rohrmühleneinrichtung mit integriertem Sichter, ausgestaltet zu einer Kreislaufmahleinrichtung;
Figur 2:
einen Querschnitt längs der Linie II-II der Figur 1;
Figur 3:
einen Detailquerschnitt längs der Linie III-III der Figur 2, und
Figur 4:
die Erfindung angewendet bei einer sogenannten Zweikammer-Rohrmühle mit Mittenaustrag.
The invention and its further features and advantages will be explained in more detail with reference to the embodiment shown schematically in the figures. It shows:
FIG. 1:
In side view, partly in vertical section, the tube mill device according to the invention with integrated separator, designed to a Kreislaufmahleinrichtung;
FIG. 2:
a cross section along the line II-II of Figure 1;
FIG. 3:
a detail cross-section along the line III-III of Figure 2, and
FIG. 4:
the invention applied to a so-called two-chamber tube mill with center discharge.

Die Rohrmühle der Figur 1 weist ein drehbar gelagertes Mühlenrohr 10 auf mit einem Mahlgutaufgabeende an der rechten Seite und einem Mahlgutaustragsende an der linken Seite. Am Mahlgutaustragsende schließt sich an das Mühlenrohr 10 ein Mühlenaustragskonus 11 an, über den die Rohrmühle von einem Motor 12 angetrieben wird. Das Mahlgut wird aus einem Aufgabebunker 13 über einen Dosierer 14 und über eine Einlaufschurre 15 in das mit Mahlkörpern wie z.B. Kugeln gefüllte Mühlenrohr 10 eingeführt. In das Mühlenrohr 10 wird am Mahlgutaufgabeende auch noch Mühlenluft 16 eingesaugt. Bei der Mahltrocknung feuchter Güter kann als Mühlenluft 16 auch ein Heißgasstrom eingesetzt werden. Um den Umfang des Mühlenaustragskonusses 11 sind mehrere Öffnungen 17 zum Austrag des gemahlenen Gutes sowie der Mühlenluft verteilt angeordnet.The tube mill of Figure 1 has a rotatably mounted mill tube 10 with a Mahlgutaufgabeende on the right side and a Mahlgutaustragsende on the left side. At Mahlgutaustragsende connects to the mill tube 10 a Mühlenaustragskonus 11, via which the tube mill is driven by a motor 12. The material to be ground is introduced from a feed bunker 13 via a metering device 14 and via a feed chute 15 into the mill tube 10 filled with grinding media such as, for example, balls. Mill air 16 is also sucked into the mill tube 10 at the Mahlgutaufgabeende. When mill drying moist goods can be used as mill air 16 and a hot gas stream. To the extent of the mill discharge cone 11 are arranged a plurality of openings 17 for discharging the milled material and the mill air distributed.

Der Mühlenaustragskonus 11 mit seinen Mahlgut- und Mühlenluft-Austragsöffnungen 17 ist von einem Gutausfallgehäuse umhaust, das erfindungsgemäß aus zwei beabstandeten feststehenden nicht rotierenden Seiten-Stirnwänden 18 und 19 besteht, zwischen denen ein drehbar gelagerter in Drehung versetzbarer Materialförderring 20 angeordnet ist, der das Gutausfallgehäuse an der Peripherie der Seiten-Stirnwände 18, 19 nach außen abschließt. Dazu ist der Materialförderring 20 auf Rollen 21 und 22 drehbar gelagert, und die Rotation des Materialförderringes 20 erfolgt über dessen zylindrischen Mantel z. B. durch die angetriebene Lagerrolle 22. Das aus den Austragsöffnungen 17 der Rohrmühle ausgetragene Mahlgut fällt nach unten auf die Innenwandung des rotierenden Materialförderringes 20, die gegebenenfalls mit Hubelementen versehen sein kann, wobei die Drehzahl des Ringes 20 unterhalb der sogenannten kritischen Drehzahl liegt, d. h. daß der Ring 20 das gemahlene Gut bis in den Bereich des oberen Scheitelpunktes des Ringes mitnimmt und dieses Gutmaterial von oben nach unten fallen läßt, und zwar in einen oberhalb des Mühlenaustragskonusses 11 im Gutausfallgehäuse angeordneten Sichtraum 23, dessen Gehäuse also von den beiden Seiten-Stirnwänden 18, 19 gebildet ist. Der Materialförderring 20 kann, wie im Ausführungsbeispiel der Figur 1 gezeigt, an seinen beiden Seiten die Ränder der beiden beabstandeten Seiten-Stirnwände 18, 19 umgreifen; jedoch können die beiden Ränder des Ringes 20 auch innerhalb der beiden beabstandeten Stirnwände 18, 19 angeordnet sein.The Mühlenaustragskonus 11 with its Mahlgut- and mill air discharge openings 17 is umhaust of a Gutausfallgehäuse, which according to the invention consists of two spaced fixed non-rotating side end walls 18 and 19, between which a rotatably mounted rotatable Materialförderring 20 is arranged, the Gutausfallgehäuse at the periphery of the side end walls 18, 19 closes to the outside. For this purpose, the material conveying ring 20 is rotatably mounted on rollers 21 and 22, and the rotation of the material conveying ring 20 via the cylindrical shell z. B. by the driven bearing roller 22. The discharged from the discharge openings 17 of the tube mill regrind falls down on the inner wall of the rotating material conveying ring 20, which may optionally be provided with lifting elements, the speed of the ring 20 is below the so-called critical speed, d , H. that the ring 20 entrains the milled material up to the region of the upper vertex of the ring and this material can fall from top to bottom, in a above the Mühlenaustragskonusses 11 Gutausfallgehäuse arranged viewing space 23, so the housing of the two side end walls 18, 19 is formed. The material conveying ring 20 can, as shown in the embodiment of Figure 1, on both sides of the edges of the two spaced side end walls 18, 19 engage around; However, the two edges of the ring 20 may also be disposed within the two spaced end walls 18, 19.

Wie aus den Figuren 2 und 3 hervorgeht, sind in wenigstens einer der beiden Seiten-Stirnwände 18,19 des Gutausfallgehäuses Sichtlufteintrittsöffnungen 24, 25 sowie eine Sichtluft- und Sichterfeingut-Austragsöffnung 26 (Fig. 1) angeordnet, von der eine Leitung 27 zum Abzug der mit Sichterfeingut beladenen Sichtluft abgeht, die zu einem Abscheider 28 zur Abtrennung des Feinguts 29 von der Sichtluft 30 führt, die von einem nicht dargestellten Saugzuggebläse abgezogen wird.As is apparent from Figures 2 and 3, in at least one of the two side end walls 18,19 Gutausfallgehäuses sighting air inlets 24, 25 and a Sichtluft- and Sichterfeingut-discharge opening 26 (Fig. 1) are arranged, from which a line 27 for Departure of the Sichterfeingut laden Sichtluft goes off, which leads to a separator 28 for separating the fine material 29 of the classifying air 30, which is subtracted from an induced draft fan, not shown.

Im Sichtraum 23 des Gutausfallgehäuses ist gemäß Ausführungsbeispiel wenigstens ein Stabkorb 31 eines dynamischen Sichters angeordnet, wobei die Stabkorbachse parallel zur Mühlenrohrachse liegt. Das an der Peripherie des vom Stabkorbantriebsmotor 32, angetriebenen rotierenden Stabkorbs 31 gesammelte Sichtergrobgut wird über ein Förderorgan 33, insbesondere eine Grieße-Luftförderrinne, zum Mahlguteintrag der Rohrmühle rezirkuliert.In the viewing space 23 of the Gutausfallgehäuses at least one rod basket 31 of a dynamic classifier is arranged according to embodiment, wherein the rod basket axis is parallel to the Mühlenrohrachse. The sifting material collected at the periphery of the rotating rod basket 31 driven by the rod basket drive motor 32 is recirculated to the grinding material feed of the tube mill via a conveying member 33, in particular a grit-air conveying trough.

Aus dem Schnittbild der Figur 2 erkennt man anhand der dort eingezeichneten Pfeile, daß das Mühlenrohr 10 sowie der Materialförderring 20 des Gutausfallgehäuses im gleichen Drehsinn drehen können. Es wäre aber auch ein unterschiedlicher Drehsinn möglich. Ferner erkennt man aus dem Schnittbild der Figur 2, daß im Gutausfallgehäuse auf dem Strömungsweg von den Mahlgutaustragsöffnungen 17 der Rohrmühle zum Rotor des Stabkorbsichters 31 leitblechartige Einbauten 34 zur Führung des Sichtluft-Mahlfeingut-Stromes 35 angeordnet sind.From the sectional view of Figure 2 can be seen on the basis of the arrows shown there that the mill tube 10 and the material conveying ring 20 of Gutausfallgehäuses can rotate in the same direction. But it would also be possible a different sense of rotation. Furthermore, it can be seen from the sectional view of FIG. 2 that baffled internals 34 for guiding the classifying-air refining fines stream 35 are arranged in the product housing on the flow path from the grist discharge openings 17 of the tube mill to the rotor of the rod basket sifter 31.

Figur 4 zeigt, daß die Erfindung auch bei einer Zweikammer-Rohrmühle mit Mittenaustrag eingesetzt werden kann. Bei dieser Zweikammermühle ist im mittleren Längsbereich das die Mahlgutaustragsöffnungen 17 der beiden Mahlkammern 36, 37 umhausende Gutausfallgehäuse angeordnet, welches ebenfalls aus den zwei beabstandeten feststehenden nicht rotierenden Seiten-Stirnwänden 18,19 sowie aus dem in Drehung versetzbaren Materialförderring 20 zusammengesetzt ist. Im Sichtraum des Gutausfallgehäuses der Zweikammer-Mühle ist wenigstens ein Sichterstabkorb 31 a angeordnet, an dessen beiden Rotorenden in Zwillingsausführung je ein mit Sichterfeingut beladener Sichtluftstrom
27 a, 27 b abgezogen wird, wobei das an der Peripherie der beiden Stabkorbhälften gesammelte Sichtergrobgut einesteils zum Mahlguteintrag der einen Mahlkammer 36 und andernteils zum Mahlguteintrag der anderen Mahlkammer 37 rezirkuliert wird.Figure 4 shows that the invention can also be used in a two-chamber tube mill with center discharge. In this two-chamber mill, the Mahlgutaustragsöffnungen 17 of the two grinding chambers 36, 37 surrounding Gutausfallgehäuse is arranged in the central longitudinal region, which is also composed of the two spaced fixed non-rotating side end walls 18,19 and from the rotatable Materialförderring 20. In Sichtungsraum the Gutausfallgehäuses the two-chamber mill at least one Sichterstabkorb 31 a is arranged at its two rotor ends in twin version each loaded with Sichterfeingut Sichtluftstrom
27 a, 27 b is withdrawn, wherein the collected at the periphery of the two rod cage halves Sichtergrobgut is partly recirculated to Mahlguteintrag one grinding chamber 36 and the other part for Mahlguteintrag the other grinding chamber 37.

Die Erfindung ist nicht nur anwendbar bei Rohrmühlen mit Zentralantrieb, sondern auch bei Rohrmühlen mit anderen Antrieben, z. B. Zahnkranzantrieb.The invention is not only applicable to tube mills with central drive, but also in tube mills with other drives, eg. B. sprocket drive.

Claims (10)

  1. Tube mill having a rotatably mounted milling tube (10) with a milling material feed end and a milled material discharge end, which is enclosed by a material exit housing for the discharge of the milled material and, if appropriate, the milling gas,
    characterized by the following features:
    - the material exit housing comprises two spaced-apart, stationary, non-rotating side walls (18, 19), between which there is arranged a rotatably mounted material conveying ring (20) that can be set rotating;
    - in the interspace between the at least one milled material exit opening (17) of the milling tube (10) and the rotatably mounted material conveying ring (20), between the two stationary material exit housing sidewalls (18, 19), a screening region (23) is integrated, having a screening air inlet opening (24), screening air and fine screened material discharge opening (26) and also a coarse screened material discharge opening in at least one of the two side walls.
  2. Tube mill according to Claim 1, characterized in that the rotatably mounted material conveying ring (20), whose inner wall is possibly provided with lifting elements, rotates at about 40 to 80% of the critical rotational speed, that is to say that the material conveying ring carries along at least some of the mill discharge material until it is upstream or downstream of the upper vertex of the ring (20) and allows this material to fall from above into the integrated screening region (23) or, in the case of an above-critical rotational speed, the material is stripped off the inner wall of the ring by means of strippers.
  3. Tube mill according to Claim 2, characterized in that the supply of the mill discharge material to the screening region is carried out partly by the rotating material conveying ring (20) (coarse material) and partly by the milling air and/or screening air (fine material).
  4. Tube mill according to Claims 1 to 3, characterized in that the rotation of the material conveying ring (20) is carried out via its cylindrical shell by means of one or more driven supporting rollers (22).
  5. Tube mill according to one of Claims 1 to 4, characterized in that in the screening region (23) of the material exit housing having the rotatably mounted material conveying ring (20) there is arranged at least one bar cage (31) of a dynamic screen, the axis of the bar cage lying parallel to or at an angle to the milling tube axis.
  6. Tube mill according to Claims 3 or 5, characterized in that in the material exit housing, on the flow path from the at least one milled material exit opening (17) of the tube mill to the screen, in particular the bar cage screen (31), there are arranged built-in fittings (34) similar to guide plates for guiding the screening air-fine milled material stream (35).
  7. Tube mill according to Claim 5, characterized in that the coarse screened material collected at the periphery of the rotating rod cage (31) of the integrated rod cage screen is recirculated to the milling material inlet of the tube mill via a conveying element (33), in particular a grit-air conveying trough.
  8. Tube mill according to Claim 5, characterized in that the drive piece of the rod cage (31) of the integrated rod cage screen is led to the outside to its drive (32) through one material exit housing side wall (19), while the other material exit housing side wall (18) has an opening (26) which is opposite the rod cage end on the drive side and from which a line (27) for the extraction of the screening air loaded with fine screened material leaves and leads to a separator (28) for the separation of the fine material (29) from the screening air (30).
  9. Two-chamber tube mill having a central discharge, in which, in the central longitudinal region of the two-chamber mill, the material exit housing enclosing the milled material exit openings (17) of the two milling chambers (26, 27) is arranged, characterized by the features specified in the characterizing part of Claim 1.
  10. Two-chamber tube mill according to Claim 9, characterized in that in the screening region of the material exit housing of the two-chamber mill there is arranged at least one screening rod cage (31a), at whose two rotor ends, in a twin design, in each case a screening air stream (27a, 27b) loaded with fine screened material is extracted, one part of the coarse screened material collected at the periphery of the two halves of the rod cage being recirculated to the milling material inlet of the one milling chamber (36) and the other part being recirculated to the milling material inlet of the other milling chamber (37).
EP00106197A 1999-03-30 2000-03-22 Tube mill Expired - Lifetime EP1040872B1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE19914288 1999-03-30
DE19914288A DE19914288B4 (en) 1999-03-30 1999-03-30 tube mill

Publications (2)

Publication Number Publication Date
EP1040872A1 EP1040872A1 (en) 2000-10-04
EP1040872B1 true EP1040872B1 (en) 2006-11-08

Family

ID=7902863

Family Applications (1)

Application Number Title Priority Date Filing Date
EP00106197A Expired - Lifetime EP1040872B1 (en) 1999-03-30 2000-03-22 Tube mill

Country Status (4)

Country Link
US (1) US6299081B1 (en)
EP (1) EP1040872B1 (en)
DE (2) DE19914288B4 (en)
DK (1) DK1040872T3 (en)

Families Citing this family (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102004023438B4 (en) * 2004-05-12 2017-08-10 Thyssenkrupp Industrial Solutions Ag tube mill
CN109092454A (en) * 2018-07-17 2018-12-28 武汉中智德远科技开发有限公司 A kind of raw material is fully ground with Horizontal-type filtering device
CN110538699B (en) * 2019-09-24 2021-04-30 曹燕红 Ore mill convenient to adjust with screening function
CN112892801B (en) * 2021-02-03 2022-08-09 孙以民 A automation equipment for chinese-medicinal material is smashed to pieces and is handled
CN113019584A (en) * 2021-03-04 2021-06-25 安徽理工大学 Coal gangue sorting equipment based on strength difference

Family Cites Families (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2198463A (en) * 1939-01-26 1940-04-23 Walter P Scott Mill discharge means
AT295298B (en) * 1967-01-31 1971-12-27 Pacemin Ag Patentverwertungsge Plant for grinding a granular feed material
US3537658A (en) * 1968-12-10 1970-11-03 Polysius Gmbh Autogenous airswept mill
GB1323295A (en) * 1970-01-06 1973-07-11 Smidth & Co As F L Dry grinding of raw materials
GB8430514D0 (en) * 1984-12-04 1985-01-09 Smidth & Co As F L Tube mill
DE19630687A1 (en) * 1996-04-19 1997-10-23 Deutz Ag High-pressure roller press for crushing granular good material
DE19726523A1 (en) * 1997-06-23 1998-12-24 Kloeckner Humboldt Wedag Cycle grinding device with high pressure roller press and sifter

Also Published As

Publication number Publication date
DE19914288B4 (en) 2007-07-26
DK1040872T3 (en) 2007-03-19
DE19914288A1 (en) 2000-10-05
DE50013709D1 (en) 2006-12-21
US6299081B1 (en) 2001-10-09
EP1040872A1 (en) 2000-10-04

Similar Documents

Publication Publication Date Title
EP1948360B1 (en) Roller mill
EP2106301B1 (en) Classifying device for classifying granular material and circulating grinding plant incorporating such a classifying device
EP0460490B1 (en) Air classifier
DE4223762A1 (en) Bulk grain classifier with reduced wear - comprising pre-classifier chamber having inlet for grains and outlet for coarse grains
DE3633747A1 (en) VERTICAL ROLL MILL
WO2018210657A1 (en) Screen ball mill for processing coarse metal-containing material
DE3843338A1 (en) SAFE
EP1430951B1 (en) Closed-circuit grinding device with a mill and a sifter
EP1090685B1 (en) Closed-circuit milling device with a high-pressure roller press and classifier
EP0887106B1 (en) Closed-circuit milling device with a high-pressure roller press and separator
EP1040872B1 (en) Tube mill
EP0514432B1 (en) Roll press or mill
DE8217579U1 (en) POWDER MILL DEVICE
DE3503043C2 (en)
DE102006017510A1 (en) Closed circuit grinding mill comprises grinding circuit for pre-grinding of fresh goods with former grinding device and sifter, and both grinding circuits are coupled by dynamic sifter with rotating rod basket, which is used by circuits
EP0801985B1 (en) High pressure roller press for pressure milling of granular material
DE476526C (en) Grinding device, consisting of a cylindrical gravity mill and a centrifugal grinder built into it for pre-comminution
DE2233923C3 (en) Ball mill for processing used foundry molding sand
EP0829303A1 (en) Ring roller mill for pressure milling of granular material
DE956218C (en) Device for cooling and crushing grainy material, in particular dried lignite
DE4132339C2 (en) Turbo centrifugal classifier
DE10018593A1 (en) Circular mill has pressure roller in area beneath coarse material or grain output of sifter(s) or beneath roller mill to be pressed against material on inner cylindrical wall of transport ring
EP0038794B1 (en) Grinding plant
DE10211916B4 (en) tube mill
DD214302A1 (en) DISCHARGE DEVICE FOR ROLLING MILLS

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

AK Designated contracting states

Kind code of ref document: A1

Designated state(s): DE DK FR

AX Request for extension of the european patent

Free format text: AL;LT;LV;MK;RO;SI

17P Request for examination filed

Effective date: 20010320

AKX Designation fees paid

Free format text: DE DK FR

RAP1 Party data changed (applicant data changed or rights of an application transferred)

Owner name: KHD HUMBOLDT WEDAG GMBH

GRAP Despatch of communication of intention to grant a patent

Free format text: ORIGINAL CODE: EPIDOSNIGR1

GRAS Grant fee paid

Free format text: ORIGINAL CODE: EPIDOSNIGR3

GRAA (expected) grant

Free format text: ORIGINAL CODE: 0009210

AK Designated contracting states

Kind code of ref document: B1

Designated state(s): DE DK FR

REF Corresponds to:

Ref document number: 50013709

Country of ref document: DE

Date of ref document: 20061221

Kind code of ref document: P

PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: DK

Payment date: 20070315

Year of fee payment: 8

REG Reference to a national code

Ref country code: DK

Ref legal event code: T3

PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: DE

Payment date: 20070529

Year of fee payment: 8

ET Fr: translation filed
RAP2 Party data changed (patent owner data changed or rights of a patent transferred)

Owner name: KHD HUMBOLDT WEDAG GMBH

PLBE No opposition filed within time limit

Free format text: ORIGINAL CODE: 0009261

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

Free format text: STATUS: NO OPPOSITION FILED WITHIN TIME LIMIT

26N No opposition filed

Effective date: 20070809

PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: FR

Payment date: 20070312

Year of fee payment: 8

REG Reference to a national code

Ref country code: DK

Ref legal event code: EBP

REG Reference to a national code

Ref country code: FR

Ref legal event code: ST

Effective date: 20081125

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: DE

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20081001

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: FR

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20080331

Ref country code: DK

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20080331