EP1855806B1 - Vertical mill - Google Patents

Vertical mill Download PDF

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Publication number
EP1855806B1
EP1855806B1 EP06707340A EP06707340A EP1855806B1 EP 1855806 B1 EP1855806 B1 EP 1855806B1 EP 06707340 A EP06707340 A EP 06707340A EP 06707340 A EP06707340 A EP 06707340A EP 1855806 B1 EP1855806 B1 EP 1855806B1
Authority
EP
European Patent Office
Prior art keywords
grinding
vertical mill
track
width
mill according
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 - Fee Related
Application number
EP06707340A
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German (de)
French (fr)
Other versions
EP1855806B2 (en
EP1855806A1 (en
Inventor
Pedro Guerreo Palma
Karl Menzel
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
ThyssenKrupp Industrial Solutions AG
Original Assignee
Polysius AG
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Application filed by Polysius AG filed Critical Polysius AG
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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B02—CRUSHING, PULVERISING, OR DISINTEGRATING; PREPARATORY TREATMENT OF GRAIN FOR MILLING
    • B02C—CRUSHING, PULVERISING, OR DISINTEGRATING IN GENERAL; MILLING GRAIN
    • B02C15/00—Disintegrating by milling members in the form of rollers or balls co-operating with rings or discs
    • B02C15/003—Shape or construction of discs or rings
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B02—CRUSHING, PULVERISING, OR DISINTEGRATING; PREPARATORY TREATMENT OF GRAIN FOR MILLING
    • B02C—CRUSHING, PULVERISING, OR DISINTEGRATING IN GENERAL; MILLING GRAIN
    • B02C15/00—Disintegrating by milling members in the form of rollers or balls co-operating with rings or discs
    • B02C15/004—Shape or construction of rollers or balls

Definitions

  • the invention relates to a vertical mill with a grinding track and at least one grinding roller.
  • a roller mill of this kind is for example from the DE-A-195 03 179 known.
  • a vertical mill is described in which the grinding roller and the grinding path have the same width.
  • the grinding tools and especially the grinding track are subject to increasing wear, which deteriorates the throughput and the specific workload of the vertical mill.
  • One explanation for this is the self-adjusting, unwanted high grinding bed thickness, which results due to an unfavorable wear contour of the grinding path.
  • the grinding track 1 wears in the middle stronger than at the edge regions. It caused on the grinding path disturbing "edges" that prevent the grinding roller 2 can press the grinding bed more.
  • the present invention is based on the object to improve the vertical mill to the effect that can set a substantially constant Mahlbettches throughout the term.
  • the vertical mill according to the invention essentially has a grinding track and at least one grinding roller, wherein the grinding track has a middle region of a harder material and two laterally adjoining edge regions of a softer material, wherein the width of the central region is less than or equal to the width of the grinding roller.
  • the grinding rollers can be formed in particular spherical, cylindrical and conical. According to a preferred embodiment of the invention, the width of the grinding track or the width of the central region is smaller than the width of the grinding roller. Preferably, the width of the grinding track or the width of the central region is between 75% and 95% of the width of the grinding roller.
  • the grinding path is arranged on the surface of a grinding ring, wherein the grinding path is bounded on both sides by internals and seals are provided between Mahlring and the internals.
  • the regrind consists in particular of binders (blastfurnace slag, cement clinker) and raw materials for cement production (limestone).
  • vertical mill in a detailed view shown vertical mill consists essentially of a rotating about a vertical axis of rotation Mahlring 3 on the surface of a grinding track 1 is fixed.
  • One or more grinding rollers 2 roll on this painting track, wherein the grinding stock 6 is comminuted between grinding track and grinding roller.
  • the grinding track 1 has a middle region 1a made of a harder material and two laterally adjoining edge regions 1b, 1c made of a softer material.
  • the width a of the central region 1a is less than or equal to the width b of the grinding roller 2. Since the edge regions 1b, 1c of a softer Material are made, there form no disturbing edges.
  • the grinding roller 2 can penetrate deep and undisturbed in the grinding bed during the entire useful life of the grinding path. Any edges on the edge of the central region 1a do not even arise or are eliminated by the grinding roller. At the end of the useful life, this results in Fig. 3 illustrated wear pattern.
  • 3 seals 7, 8 are provided between the internals 4 and 5 and the grinding ring.
  • the laterally adjoining edge regions 1'b, 1'c are formed by ground material, wherein the two edge regions 1'b, 1'c formed by ground material are bounded on the one hand by the middle region 1'a and the internals 4, 5 ,
  • the grinding rollers 2 are each formed crowned. As in Fig. 1 indicated by dashed lines, the grinding roller but also cylindrical, or conical (dash-dotted line) can be formed.
  • the width a of the central region 1a, 1'a is smaller than the width b of the grinding roller, wherein the width a is preferably between 75% and 95% of the width b of the grinding roller.
  • the vertical mills described above are characterized by a narrower compared to the prior art grinding path, which has the advantage that sets a constant Mahlbettlands over the entire term. Despite the lower wear weight, this design also results in a longer service life.

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

Abstract

The invention relates to a vertical mill comprising a grinding track (1) and at least one grinding roller (2). The grinding track (1) is provided with a central zone (Ia) made of a harder material and two laterally adjacent edge zones (Ib, Ic) made of a softer material. The width (a) of the central zone (Ia) is smaller than or equal to the width of the grinding roller (2).

Description

Die Erfindung betrifft eine Vertikalmühle mit einer Mahlbahn und wenigstens einer Mahlrolle.The invention relates to a vertical mill with a grinding track and at least one grinding roller.

Vertikalmühlen sind aus dem Stand der Technik in den unterschiedlichsten Ausführungsformen bekannt. Diese Mühlen weisen üblicherweise einen drehbar angeordneten Mahlring auf, auf dessen Oberseite eine ringförmige Mahlbahn ausgebildet ist. Über den Umfang dieser Mahlbahn sind meist mehrere Mahlrollen verteilt angeordnet, die während der Zerkleinerung mit der Mahlbahn in Abrolleingriff kommen.Vertical mills are known from the prior art in a variety of embodiments. These mills usually have a rotatably arranged Mahlring, on its upper side an annular grinding track is formed. Over the circumference of this grinding path usually several grinding rollers are arranged distributed, which come during the crushing of the grinding track in Abrolleingriff.

Eine Wälzmühle dieser Art ist beispielsweise aus der DE-A-195 03 179 bekannt. In der US 984,584 wird eine Vertikalmühle beschrieben, bei der die Mahlrolle und die Mahlbahn die gleiche Breite aufweisen.A roller mill of this kind is for example from the DE-A-195 03 179 known. In the US 984,584 a vertical mill is described in which the grinding roller and the grinding path have the same width.

Während des Mahlvorganges unterliegen die Mahlwerkzeuge und insbesondere die Mahlbahn einem zunehmenden Verschleiß, der den Durchsatz und den spezifischen Arbeitsbedarf der Vertikalmühlen verschlechtert. Eine Erklärung hierfür ist die sich einstellende, nicht gewollte hohe Mahlbettstärke, die sich aufgrund einer ungünstigen Verschleißkontur der Mahlbahn ergibt. Wie insbesondere aus Fig. 4 zu ersehen ist verschleißt die Mahlbahn 1 in der Mitte stärker als an den Randbereichen. Es entstehen an der Mahlbahn störende "Kanten", die verhindern, dass die Mahlrolle 2 das Mahlbett stärker eindrücken kann.During the milling process, the grinding tools and especially the grinding track are subject to increasing wear, which deteriorates the throughput and the specific workload of the vertical mill. One explanation for this is the self-adjusting, unwanted high grinding bed thickness, which results due to an unfavorable wear contour of the grinding path. As in particular from Fig. 4 can be seen, the grinding track 1 wears in the middle stronger than at the edge regions. It caused on the grinding path disturbing "edges" that prevent the grinding roller 2 can press the grinding bed more.

Der vorliegenden Erfindung liegt nun die Aufgabe zugrunde, die Vertikalmühle dahingehend zu verbessern, das sich während der gesamten Laufzeit eine im wesentlichen gleichbleibende Mahlbettstärke einstellen kann.The present invention is based on the object to improve the vertical mill to the effect that can set a substantially constant Mahlbettstärke throughout the term.

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

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

Die erfindungsgemäße Vertikalmühle weist im wesentlichen eine Mahlbahn und wenigstens eine Mahlrolle auf, wobei die Mahlbahn einen Mittelbereich aus einem härteren Material und zwei seitlich anschließende Randbereiche aus einem weicheren Material aufweist, wobei die Breite des Mittelbereichs kleiner oder gleich der Breite der Mahlrolle ist.The vertical mill according to the invention essentially has a grinding track and at least one grinding roller, wherein the grinding track has a middle region of a harder material and two laterally adjoining edge regions of a softer material, wherein the width of the central region is less than or equal to the width of the grinding roller.

Mit einer derartigen Ausgestaltung kann die Bildung von störenden Kanten gemäß Fig. 5 zuverlässig vermieden werden, so dass sich eine im wesentlichen gleichbleibende Materialbettstärke über die gesamte Laufzeit einstellt. Bei gleicher Mahlrolle kann somit eine schmalere Mahlbahn realisiert werden, wodurch Gewicht und Kosten der Mahlbahn reduziert werden können. Bei den der Erfindung zugrundeliegenden Versuchen hat sich außerdem gezeigt, dass die Mahlbahn trotz des geringeren Gewichtes eine längere Standzeit ermöglicht.With such a configuration, the formation of interfering edges shown in FIG. 5 can be reliably avoided, so that sets a substantially constant material bed thickness over the entire term. With the same grinding roller thus a narrower grinding track can be realized, whereby weight and cost of the grinding path can be reduced. In the experiments on which the invention is based, it has also been shown that the grinding path allows a longer service life despite the lower weight.

Die Mahlrollen können insbesondere ballig, zylindrisch und konisch ausgebildet werden. Gemäß einer bevorzugten Ausgestaltung der Erfindung ist die Breite der Mahlbahn bzw. die Breite des Mittelbereichs kleiner als die Breite der Mahlrolle. Vorzugsweise beträgt die Breite der Mahlbahn bzw. die Breite des Mittelbereichs zwischen 75% und 95% der Breite der Mahlrolle.The grinding rollers can be formed in particular spherical, cylindrical and conical. According to a preferred embodiment of the invention, the width of the grinding track or the width of the central region is smaller than the width of the grinding roller. Preferably, the width of the grinding track or the width of the central region is between 75% and 95% of the width of the grinding roller.

In einer weiteren Ausgestaltung der Erfindung ist die Mahlbahn auf der Oberfläche eines Mahlrings angeordnet, wobei die Mahlbahn zu beiden Seiten durch Einbauten begrenzt wird und zwischen Mahlring und den Einbauten Dichtungen vorgesehen sind.In a further embodiment of the invention, the grinding path is arranged on the surface of a grinding ring, wherein the grinding path is bounded on both sides by internals and seals are provided between Mahlring and the internals.

Das Mahlgut besteht insbesondere aus Bindemitteln (Hüttensand, Zementklinker) und Rohmaterialien für die Zementherstellung (Kalkstein). Die Mahlrolle drückt dabei mit einem Druck von 600 bis 1800kN/m2 (Kraft auf projizierte Rollenfläche). Weitere Vorteile und Ausgestaltungen der Erfindung werden anhand der Beschreibung einiger Beispiele und der Zeichnung näher erläutert.The regrind consists in particular of binders (blastfurnace slag, cement clinker) and raw materials for cement production (limestone). The grinding roller presses with a pressure of 600 to 1800 kN / m 2 (force on projected roller surface). Further advantages and embodiments of the invention will be explained in more detail with reference to the description of some examples and the drawings.

In der Zeichnung zeigen

Fig. 1
eine Schnittdarstellung einer Vertikalmühle im Bereich von Mahlbahn und Mahlrolle gemäß einem ersten Ausführungsbeispiel,
Fig. 2
eine Schnittdarstellung einer Vertikalmühle im Bereich von Mahlbahn und Mahlrolle gemäß einem zweiten Ausführungsbeispiel,
Fig. 3
eine Schnittdarstellung der Vertikalmühle gemäß den Figuren 1 oder 2 nach Verschleiß der Mahlbahn sowie
Fig. 4
eine schematische Schnittdarstellung einer Vertikalmühle im Bereich von Mahlbahn und Mahlrolle gemäß dem Stand der Technik.
In the drawing show
Fig. 1
a sectional view of a vertical mill in the region of grinding track and grinding roller according to a first embodiment,
Fig. 2
a sectional view of a vertical mill in the region of grinding track and grinding roller according to a second embodiment,
Fig. 3
a sectional view of the vertical mill according to the FIGS. 1 or 2 after wear of the grinding track as well
Fig. 4
a schematic sectional view of a vertical mill in the field of grinding track and grinding roller according to the prior art.

Die in Fig. 1 in einer Detailansicht dargestellte Vertikalmühle besteht im wesentlichen aus einem um eine vertikale Drehachse rotierenden Mahlring 3 auf dessen Oberfläche eine Mahlbahn 1 befestigt ist. Ein oder mehrere Mahlrollen 2 rollen auf dieser Malbahn ab, wobei zwischen Mahlbahn und Mahlrolle das Mahlgut 6 zerkleinert wird.In the Fig. 1 in a detailed view shown vertical mill consists essentially of a rotating about a vertical axis of rotation Mahlring 3 on the surface of a grinding track 1 is fixed. One or more grinding rollers 2 roll on this painting track, wherein the grinding stock 6 is comminuted between grinding track and grinding roller.

Zu beiden Seiten der Mahlbahn 1 sind Einbauten 4, 5 vorgesehen, die mit radialem Abstand zur Mahlbahn angeordnet sind. Diese Einbauten dienen zur Abgrenzung der Mahlgutschicht. Die Mahlbahn 1 weist einen Mittelbereich 1a aus einem härteren Material und zwei seitlich anschließende Randbereiche 1b, 1c aus einem weicheren Material aufweist. Hierbei ist die Breite a des Mittelbereichs 1a kleiner oder gleich der Breite b der Mahlrolle 2. Da die Randbereichen 1b, 1c aus einem weicherem Material gefertigt sind, bilden sich dort keine störenden Kanten aus. Durch diese Ausgestaltung kann die Mahlrolle 2 tief und ungestört in das Mahlbett während der gesamten Nutzungszeit der Mahlbahn eindringen. Etwaige Kanten am Rand des Mittelbereichs 1a entstehen erst gar nicht oder werden von der Mahlrolle beseitigt. Am Ende der Nutzungszeit ergibt sich das in Fig. 3 dargestellte Verschleißbild.On both sides of the grinding track 1 internals 4, 5 are provided, which are arranged at a radial distance from the grinding path. These installations are used to delineate the Mahlgutschicht. The grinding track 1 has a middle region 1a made of a harder material and two laterally adjoining edge regions 1b, 1c made of a softer material. Here, the width a of the central region 1a is less than or equal to the width b of the grinding roller 2. Since the edge regions 1b, 1c of a softer Material are made, there form no disturbing edges. By this configuration, the grinding roller 2 can penetrate deep and undisturbed in the grinding bed during the entire useful life of the grinding path. Any edges on the edge of the central region 1a do not even arise or are eliminated by the grinding roller. At the end of the useful life, this results in Fig. 3 illustrated wear pattern.

Um am Ende der Nutzungszeit eine ausreichende Abdichtung zwischen der Mahlbahn und den seitlich angrenzenden Bereichen zu gewährleisten, sind zwischen den Einbauten 4 bzw. 5 und dem Mahlring 3 Dichtungen 7, 8 vorgesehen.In order to ensure an adequate seal between the grinding path and the laterally adjacent areas at the end of the period of use, 3 seals 7, 8 are provided between the internals 4 and 5 and the grinding ring.

Bei der in Fig. 2 dargestellten Mahlbahn 1' werden die seitlich anschließenden Randbereiche 1'b, 1'c durch Mahlgut gebildet, wobei die beiden durch Mahlgut ausgebildeten Randbereiche 1'b, 1'c zum einen durch den Mittelbereich 1'a und die Einbauten 4, 5 begrenzt werden.At the in Fig. 2 1 ', the laterally adjoining edge regions 1'b, 1'c are formed by ground material, wherein the two edge regions 1'b, 1'c formed by ground material are bounded on the one hand by the middle region 1'a and the internals 4, 5 ,

In den dargestellten Ausführungsbeispielen sind die Mahlrollen 2 jeweils ballig ausgebildet. Wie in Fig. 1 gestrichelt angedeutet, kann die Mahlrolle aber auch zylindrisch, oder konisch (strichpunktierter Linie) ausgebildet werden.In the illustrated embodiments, the grinding rollers 2 are each formed crowned. As in Fig. 1 indicated by dashed lines, the grinding roller but also cylindrical, or conical (dash-dotted line) can be formed.

Gemäß einer bevorzugten Ausgestaltung ist die Breite a des Mittelbereichs 1a, 1'a kleiner als die Breite b der Mahlrolle, wobei die Breite a vorzugsweise zwischen 75% und 95% der Breite b der Mahlrolle beträgt.According to a preferred embodiment, the width a of the central region 1a, 1'a is smaller than the width b of the grinding roller, wherein the width a is preferably between 75% and 95% of the width b of the grinding roller.

Die oben beschriebenen Vertikalmühlen zeichnen sich durch eine im Vergleich zum Stand der Technik schmalere Mahlbahn aus, die den Vorteil hat, das sich über die gesamte Laufzeit eine gleichbleibende Mahlbettstärke einstellt. Trotzt des geringeren Verschleißgewichtes ergibt sich zudem bei dieser Konstruktion eine längere Standzeit.The vertical mills described above are characterized by a narrower compared to the prior art grinding path, which has the advantage that sets a constant Mahlbettstärke over the entire term. Despite the lower wear weight, this design also results in a longer service life.

Claims (10)

  1. Vertical mill with a grinding track (1) and at least one grinding roller (2), characterised in that the grinding track (1; 1') comprises a central zone (1a; 1'a) of a harder material and two laterally adjacent edge zones (1b, 1c; 1'b, 1'c) of a softer material, wherein the width (a) of the central zone (1a; 1'a) is smaller than or equal to the width (b) of the grinding roller (2).
  2. Vertical mill according to Claim 1, characterised in that the laterally adjacent edge zones (1'b, 1'c) of the grinding track are formed by grinding material.
  3. Vertical mill according to Claim 1, characterised in that the grinding roller (2) is of crowned formation.
  4. Vertical mill according to Claim 1, characterised in that the grinding roller (2) is of cylindrical formation.
  5. Vertical mill according to Claim 1, characterised in that the grinding roller (2) is of conical formation.
  6. Vertical mill according to Claim 1, characterised in that the width (a) of the grinding track (1) or of the central zone (1a, 1'a) is smaller than the width (b) of the grinding roller (2).
  7. Vertical mill according to Claim 1, characterised in that the width (a) of the grinding track (1) or of the central zone (1a, 1'a) is between 75% and 95% of the width of the grinding roller.
  8. Vertical mill according to Claim 1, characterised in that fittings (4, 5) are provided on both sides of the grinding track (1), these being disposed at a radial distance from the grinding track.
  9. Vertical mill according to Claim 1, characterised in that fittings (4, 5) are provided on both sides of the grinding track (1), these being disposed at a radial distance from the grinding track, wherein the interspace which forms is filled with grinding material.
  10. Vertical mill according to Claim 1, characterised by a grinding ring (3), on the surface of which the grinding track (1) is disposed, which track is delimited on both sides by fittings (4, 5), wherein seals (7, 8) are provided between the grinding ring and the fittings.
EP06707340.3A 2005-03-03 2006-02-28 Vertical mill Expired - Fee Related EP1855806B2 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE102005010069A DE102005010069A1 (en) 2005-03-03 2005-03-03 vertical mill
PCT/EP2006/001842 WO2006092277A1 (en) 2005-03-03 2006-02-28 Vertical mill

Publications (3)

Publication Number Publication Date
EP1855806A1 EP1855806A1 (en) 2007-11-21
EP1855806B1 true EP1855806B1 (en) 2011-07-20
EP1855806B2 EP1855806B2 (en) 2015-01-14

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ID=36406544

Family Applications (1)

Application Number Title Priority Date Filing Date
EP06707340.3A Expired - Fee Related EP1855806B2 (en) 2005-03-03 2006-02-28 Vertical mill

Country Status (7)

Country Link
US (1) US7866584B2 (en)
EP (1) EP1855806B2 (en)
JP (1) JP4865736B2 (en)
CN (1) CN101132859B (en)
DE (1) DE102005010069A1 (en)
DK (1) DK1855806T4 (en)
WO (1) WO2006092277A1 (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP4865736B2 (en) * 2005-03-03 2012-02-01 ポリシウス アクチェンゲゼルシャフト Vertical mill

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR3026967B1 (en) * 2014-10-10 2016-10-28 Fives Fcb COMPRESSOR BINDER OF BED OF MATERIALS
JP5859698B1 (en) * 2015-04-17 2016-02-10 三菱日立パワーシステムズ株式会社 Crushing roller and crushing device
US10646877B2 (en) * 2017-03-13 2020-05-12 General Electric Technology Gmbh System and method for adjusting a material bed depth in a pulverizer mill

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US984584A (en) * 1910-08-24 1911-02-21 Nevada Engineering Works Chilian mill.
DE957435C (en) * 1952-11-14 1957-01-31 Pfeiffer Barbarossawerke A G G Roller grinder
DE3508161A1 (en) * 1985-03-07 1986-09-11 Loesche GmbH, 4000 Düsseldorf ROLL MILL FOR GRINDING GRIND
JPS62103439A (en) * 1985-10-30 1987-05-13 Mazda Motor Corp Suction device for engine
JP2649752B2 (en) * 1991-08-20 1997-09-03 宇部興産株式会社 Vertical crusher
JPH06142537A (en) * 1992-11-09 1994-05-24 Babcock Hitachi Kk Roller mill
CA2138074A1 (en) * 1993-12-17 1995-06-18 Martin H. Gygi Milling device
DE19503179A1 (en) * 1995-02-01 1996-08-08 Krupp Polysius Ag Roller mill for grinding solid material
WO1998046357A1 (en) * 1997-04-15 1998-10-22 Fcb Improvements to crushers with ring-shaped track and roller
JP3613730B2 (en) * 2001-12-03 2005-01-26 川崎重工業株式会社 Vertical mill
DE102005010069A1 (en) * 2005-03-03 2006-09-07 Polysius Ag vertical mill

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP4865736B2 (en) * 2005-03-03 2012-02-01 ポリシウス アクチェンゲゼルシャフト Vertical mill

Also Published As

Publication number Publication date
CN101132859A (en) 2008-02-27
CN101132859B (en) 2011-11-23
DK1855806T3 (en) 2011-10-31
EP1855806B2 (en) 2015-01-14
DE102005010069A1 (en) 2006-09-07
JP4865736B2 (en) 2012-02-01
US7866584B2 (en) 2011-01-11
EP1855806A1 (en) 2007-11-21
US20090039187A1 (en) 2009-02-12
JP2008531265A (en) 2008-08-14
WO2006092277A1 (en) 2006-09-08
DK1855806T4 (en) 2015-04-27

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