EP1948360B1 - Roller mill - Google Patents

Roller mill Download PDF

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Publication number
EP1948360B1
EP1948360B1 EP06806404A EP06806404A EP1948360B1 EP 1948360 B1 EP1948360 B1 EP 1948360B1 EP 06806404 A EP06806404 A EP 06806404A EP 06806404 A EP06806404 A EP 06806404A EP 1948360 B1 EP1948360 B1 EP 1948360B1
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Prior art keywords
roller mill
grinding
classifying
mill according
area
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EP06806404A
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German (de)
French (fr)
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EP1948360A1 (en
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André BÄTZ
Michael Keyssner
Udo Meyer
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Loesche GmbH
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Loesche GmbH
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    • 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
    • B02C15/001—Air flow directing means positioned on the periphery of the horizontally rotating milling surface
    • 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
    • B02C2015/002—Disintegrating by milling members in the form of rollers or balls co-operating with rings or discs combined with a classifier

Definitions

  • the invention relates to a roller mill, in particular for crushing ores, according to the preamble of claim 1, for example, from WO 2005 000473 is known.
  • Mills which are to be used in ore processing, must ensure gentle comminution.
  • the regrind should only be comminuted to such an extent that the subsequent processes for obtaining the respective valuable material of the ore can be carried out as efficiently as possible. In particular, fines are to be avoided, as they have a negative effect on the subsequent processes.
  • Out DE 102 24 009 B4 is a shear-free ore crushing known, in which a LOESCHE type air flow roller mill is used.
  • the transport of the material to be ground within the grinding chamber and to the separator and to the downstream dust separator takes place with the aid of an air or gas stream, which flows from an annular channel arranged below the grinding bowl into the grinding chamber. Due to the flow direction from bottom to top and thus against gravity and the geometric conditions with respect to the height of the grinding chamber or distance to the viewing space, a correspondingly large kinetic energy must be available to ensure the pneumatic transport of the grinding material particles.
  • the energy consumption increases when the grain fraction to be transported has larger Mahlgutpelle.
  • ore processing requires a coarser grain fraction than is required by the cement and power plant industries, where subtleties of, for example, 15% R0.09 on cement raw material or coals are common for the downstream firing processes. In contrast, residual values of, for example, 20% R0.212 are required for ores. This leads to a higher energy requirement for the gas flow, which is why the known air flow rolling mills are not used or to a small extent.
  • An improved energy balance in the field of particle transport can be achieved if instead of the pneumatic conveying a mechanical promotion takes place.
  • the millbase placed in the center of a grinding bowl which is moved outwardly by the centrifugal force and comminuted in the grinding gap between the grinding rolls and the grinding path and then thrown over the grinding bowl edge, falls into an annular gap formed by the rotating grinding bowl and a stationary cylindrical housing ,
  • About inclined sheets in a lower part of the mill the material to be ground slips to mechanical conveyors, which transport the material to be separated to visual or screening devices where the fine fraction is separated from the coarse grain.
  • the coarse grain is re-fed to the mill for further comminution, and up to ten turns are required to achieve the desired grain size.
  • the fines are processed in downstream processes.
  • Such grinding circuits are operated with roller-type grinding machines of the LOESCHE type and are also known with mills of a different type, for example with roll presses (US Pat. WO 99/54514 A1 ).
  • a roller mill which is used for mixing materials and also for comminution, for example ores.
  • the roller mill has, at the level of the grinding bowl, a discharge opening in the grinding space wall for the comminuted material to be ground.
  • the horizontal Mahlgutaustrag done with the help of arranged on the underside of the grinding bowl fan blades.
  • the grinding process and the degree of comminution are determined by the design of the housing adjacent the grinding bowl or the grinding chamber wall, the horizontal discharge opening, the adjustable fan blades and vertical deflectors arranged between the grinding rolls.
  • An alternative formed mill has next to the horizontal Discharge opening still openings below the grinding bowl. In this passes over the Mahlschdorflrand and into the annular gap between the grinding bowl and the lower part of the mill falling, crushed material, which is then fed mechanically or by means of blowers for further treatment.
  • the invention has for its object to form a roller mill such that a mechanical or pneumatic transport of the crushed ground material accounts for a visual or screening system and the desired grain fraction can be achieved with a relatively low energy consumption.
  • a basic idea of the invention can be seen in the fact that a viewing apparatus is arranged below the grinding chamber, in which the comminuted grinding stock which has been crushed on the grinding bowl and falls downwards over the grinding bowl edge as a result of gravity is subjected to a screening and separated into a fine material and coarse material fraction.
  • the sighting takes place with the aid of a gas or air stream, referred to below as the classifying air stream, which is fed to the classifying device via a lower annular chamber and loaded with fine material.
  • the coarser material particles pass through a coarse material discharge from the viewing device, which is integrated into the roller mill for a "down" direction.
  • An energy saving is achieved because a promotion of the comminuted material to be ground to a sifter or to a screening system outside the mill is eliminated. Also, no kinetic energy is required, since the falling energy of Mahlgutpizate which are dropped over the Mahlschdorflrand exploited.
  • the viewing device and the annular chamber are arranged cylindrically around a lower region of the grinding bowl and at least one inlet opening for the classifying air stream and at least one fine material discharge and a coarse material discharge are formed in the annular chamber or wall of the classifying device.
  • the viewing device below the grinding chamber can be designed for a static and / or dynamic sighting.
  • dynamic classifying rotors may be arranged in the region of the annular space, which have a horizontal or vertical axis of rotation.
  • a static viewing device which is designed as a blind sifter and has inclined, overlapping lamellae.
  • These blinds classifiers can be operated with a relatively high dust concentration. By requiring less gas relative to the regrind, further energy savings are achieved.
  • the slats of the shutter device designed as a blind are directed obliquely downwards and outwards.
  • the ground material dropped over the grinding bowl edge which falls under the influence of the free falling energy into the sighting device, strikes the overlapping lamellae, wherein the mass flow slows down when hitting each lamella and due to the inclination over the Edge is led to the next slat.
  • the introduced classifying air flow flows through the blind and the regrind curtain.
  • the finer particles are directed outwards and leave the sighting device with the classifying air flow through the fines discharge.
  • the coarser particles fall down in the direction Grobgutaustrag, which is arranged in a bottom region of the reformerwandung.
  • the size of the particles deflected to the fines discharge can be influenced by the amount of gas and the resulting speeds between the fins. If the fines gas stream downstream of the fins has a deflection of e.g. experiences about 90 °, an additional separation effect is achieved.
  • cover elements are arranged which can limit the annular space opening axially and / or ring segment-like and serve for sealing.
  • the cover elements are expediently designed in the form of flaps or ring segments and delimit the annular space opening in such a way that it is completely filled by the ground material flow dropped over the grinding bowl edge.
  • the cover elements are expediently adjustable, in particular pivotable about a horizontal axis, attached to the grinding chamber wall.
  • Roller mills in modular design according to the LOESCHE principle which separately supported on mill stands and pivotally mounted grinding rollers are equipped with a viewing device, which each has viewing areas between the mill stands. In each field of view is then coaxial and outside a fines discharge, for example a nozzle, and arranged on the bottom side Grobgutaustrag, the merging takes place outside the mill.
  • a fines discharge for example a nozzle
  • the annular chamber in the lower part of the grinding bowl encloses this completely, wherein the seal can be done to the rotating grinding bowl by a labyrinth / gap seal.
  • a cylindrical section or a partially cylindrical connecting wall is arranged in each case between the individual viewing areas, which can be advantageously designed as blinds, which extends into the upper area of the grinding bowl and is sealed here, for example by a gap seal.
  • crushed ground material in the field of view between the mill stands guide plates are arranged below the grinding rollers in the annular space between the grinding bowl and the grinding chamber wall. These are roof-like in the upper area and supported on vertical baffles. The attachment can be made on the vertical connecting wall.
  • Fig. 1 shows a longitudinal section through the left side of a roller mill in the region of a grinding roller 4, which rolls on a grinding bowl 2.
  • the grinding bowl 2 rotates about an axis of rotation 25, and the grinding stock 7 comminuted in a grinding gap between the grinding roll 4 and the grinding bowl 2 passes via the grinding bowl edge 6 into an annular space 5.
  • the annular space 5 is separated from the grinding bowl edge 6 and a grinding chamber wall 3, which is in the Essentially oriented vertically, limited. Upwards, the grinding chamber can have a cover (not shown), and a dedusting device can be arranged.
  • the mill can also be driven in open-air operation.
  • a viewing device 10 is arranged, which is supplied to a classifying air stream 12 via an annular chamber 11.
  • the viewing device 10 is a static blind sifter, which has inclined and overlapping lamellae 16.
  • the sighting device 10 with the fins 16 is arranged such that the comminuted material to be ground 7, which falls on the Mahlschüsselrand 6 and the annulus 5 solely by falling energy down, impinges on the individual fins 16, braked and with the help of the prepare for the coarse material, is sighted.
  • the fines separated from the coarse material passes with the classifying air via a fines discharge 14, which extends almost over the entire height of the sighting device 10 and coaxial with this in an outer wall 13, to the outside, while the coarse material via a coarse material discharge 15 in a bottom wall 17 of Viewing device 10 is discharged.
  • Fig. 1 makes it clear that the fines discharge is arranged in the outer wall 13 such that the fines laden with fine air undergoes a deflection, whereby an additional separation effect is achieved. A rejection of possibly still entrained coarse particles can also be effected by guide plates 27, which are arranged in the fines 14.
  • Fig. 1 illustrates further that the bottom side wall 17, which is bounded on the inside of the annular chamber 11 and the outside of the coarse material discharge 15, the same inclination as the fins 16 of the sighting device 10 has.
  • cover elements 18 are pivotally attached to the grinding chamber wall 3, which prevent the classifying air 12 passes through the annulus 5 in the grinding chamber and can counteract the crushed grist 7 falling down.
  • cover elements 17 can be pivoted in such a way that the annular space 5 has an opening completely filled by the comminuted grinding stock flow.
  • the grinding chamber wall 3 may be formed in the region of the grinding bowl edge 6 as a baffle 24 and be provided with a wear-resistant lining (not shown).
  • Fig. 2 shows a viewing device 10 in a perspective view, which for installation below the grinding bowl of a roller mill in modular design of the LOESCHE type is trained.
  • the sighting device 10 is provided with viewing areas 20, which are arranged between the mill stands (not shown).
  • the annular chamber 11, in which the classifying air or the classifying gas 12 is introduced encloses the grinding bowl 2 (see FIG. 1 ) in a lower area completely.
  • the viewing areas 20 are in Fig. 2 Venetian blinds with slats 16 inclined outwards and downwards, in the region of which stubs are arranged on the outside as fine-material discharge 14 in the outer housing 13 (see FIG Fig. 1 ).

Description

Die Erfindung betrifft eine Wälzmühle, insbesondere zur Zerkleinerung von Erzen, gemäß dem Oberbegriff des Anspruchs 1 die beispielweise aus WO 2005 000473 bekannt ist.The invention relates to a roller mill, in particular for crushing ores, according to the preamble of claim 1, for example, from WO 2005 000473 is known.

Mühlen, welche bei der Erzaufbereitung eingesetzt werden sollen, müssen eine schonende Zerkleinerung gewährleisten. Das Mahlgut soll nur so weit zerkleinert werden, dass die nachfolgenden Prozesse zur Gewinnung des jeweiligen Wertstoffes des Erzes möglichst effizient durchgeführt werden können. Insbesondere sind Feinanteile zu vermeiden, da diese sich negativ auf die nachfolgenden Verfahren auswirken.Mills, which are to be used in ore processing, must ensure gentle comminution. The regrind should only be comminuted to such an extent that the subsequent processes for obtaining the respective valuable material of the ore can be carried out as efficiently as possible. In particular, fines are to be avoided, as they have a negative effect on the subsequent processes.

Aus DE 102 24 009 B4 ist eine scherfreie Zerkleinerung von Erzen bekannt, bei welcher eine Luftstrom-Wälzmühle des LOESCHE-Typs eingesetzt wird. Der Transport des Mahlgutes innerhalb des Mahlraumes und zum Sichter sowie zu dem nachgeschalteten Staubabscheider erfolgt mit Hilfe eines Luft- bzw. Gasstroms, welcher aus einem unterhalb der Mahlschüssel angeordneten Ringkanal in den Mahlraum strömt. Aufgrund der Strömungsrichtung von unten nach oben und damit entgegen der Schwerkraft und den geometrischen Verhältnissen in Bezug auf Höhe des Mahlraumes bzw. Abstand zum Sichtraum muss eine entsprechend große kinetische Energie zur Verfügung stehen, um den pneumatischen Transport der Mahlgutpartikel sicher zu stellen. Der Energieaufwand vergrößert sich, wenn die zu transportierende Kornfraktion größere Mahlgutpartikel aufweist.Out DE 102 24 009 B4 is a shear-free ore crushing known, in which a LOESCHE type air flow roller mill is used. The transport of the material to be ground within the grinding chamber and to the separator and to the downstream dust separator takes place with the aid of an air or gas stream, which flows from an annular channel arranged below the grinding bowl into the grinding chamber. Due to the flow direction from bottom to top and thus against gravity and the geometric conditions with respect to the height of the grinding chamber or distance to the viewing space, a correspondingly large kinetic energy must be available to ensure the pneumatic transport of the grinding material particles. The energy consumption increases when the grain fraction to be transported has larger Mahlgutpartikel.

In der Regel erfordert die Erzaufbereitung eine gröbere Kornfraktion als dies für die Zement- und Kraftwerksindustrie erforderlich ist, wo Feinheiten von beispielsweise 15% R0,09 bei Zementrohmaterial oder Kohlen für die nachgeschalteten Brennprozesse üblich sind. Dagegen werden bei Erzen Rückstandswerte von beispielsweise 20%R0,212 gefordert. Dies führt zu einem höheren Energiebedarf für den Gasstrom, weshalb die bekannten Luftstrom-Wälzmühlen nicht bzw. in einem geringen Umfang eingesetzt werden.Typically, ore processing requires a coarser grain fraction than is required by the cement and power plant industries, where subtleties of, for example, 15% R0.09 on cement raw material or coals are common for the downstream firing processes. In contrast, residual values of, for example, 20% R0.212 are required for ores. This leads to a higher energy requirement for the gas flow, which is why the known air flow rolling mills are not used or to a small extent.

Eine verbesserte Energiebilanz im Bereich des Partikeltransportes kann erreicht werden, wenn anstelle der pneumatischen Förderung eine mechanische Förderung erfolgt. Das im Zentrum einer Mahlschüssel aufgegebene Mahlgut, welches durch die Zentrifugalkraft nach außen bewegt und im Mahlspalt zwischen den Mahlwalzen und der Mahlbahn zerkleinert und danach über den Mahlschüsselrand abgeworfen wird, fällt in einen Ringspalt, der durch die rotierende Mahlschüssel und ein feststehendes zylindrisches Gehäuse gebildet wird. Über geneigte Bleche in einem unteren Bereich der Mühle rutscht das Mahlgut zu mechanischen Förderern, welche das Mahlgut zu separat aufgestellten Sicht- oder Siebeinrichtungen transportieren, wo der Feinanteil vom Grobkorn getrennt wird. Das Grobkorn wird der Mühle zur weiteren Zerkleinerung erneut aufgegeben, und es sind bis zu zehn Umläufen erforderlich, um die gewünschte Korngröße zu erreichen. Das Feingut wird in nachgeschalteten Prozessen verarbeitet.An improved energy balance in the field of particle transport can be achieved if instead of the pneumatic conveying a mechanical promotion takes place. The millbase placed in the center of a grinding bowl, which is moved outwardly by the centrifugal force and comminuted in the grinding gap between the grinding rolls and the grinding path and then thrown over the grinding bowl edge, falls into an annular gap formed by the rotating grinding bowl and a stationary cylindrical housing , About inclined sheets in a lower part of the mill, the material to be ground slips to mechanical conveyors, which transport the material to be separated to visual or screening devices where the fine fraction is separated from the coarse grain. The coarse grain is re-fed to the mill for further comminution, and up to ten turns are required to achieve the desired grain size. The fines are processed in downstream processes.

Derartige Mahlkreisläufe werden mit Wälzmühlen des LOESCHE-Typs betrieben und sind auch mit Mühlen anderer Bauart, beispielsweise mit Walzenpressen bekannt ( WO 99/54514 A1 ).Such grinding circuits are operated with roller-type grinding machines of the LOESCHE type and are also known with mills of a different type, for example with roll presses (US Pat. WO 99/54514 A1 ).

In EP1 247 580 A2 ist eine Kreislaufmahleinrichtung mit einer Hochdruck-Walzenmühle und einem Sichter bekannt, welche innerhalb zweier feststehender Seitenwände und einem dazwischenliegenden drehbar gelagerten, in Drehrichtung versetzbaren Materialförderring für einen internen Gutmaterialkreislauf angeordnet sind. Im Raum unterhalb des Walzenspaltes der Walzenmühle ist ein statischer Kaskadensichter mit V-förmigen Leitblechen angeordnet, und Sichtluft wird durch ein Zuführungsgehäuse in einer der Seitenwände in den Raum unterhalb der Walzenmühle eingeführt. Der statische Kaskadensichter wirkt als Desagglomerator für die Walzenpressenschülpen. Die mit Feingut beladene Sichtluft wird über die Seitenwände herausgeführt, während die Grobgutpartikel in den rotierenden Materialförderring gelangen und der Walzenmühle erneut zugeführt werden. Dem statischen Kaskadensichter kann noch ein dynamischer Sichter nachgeschaltet werden. Diese Einrichtung weist eine relativ große Bauhöhe auf. Da beim statischen als auch beim dynamischen Sichter die Seitenwände des Arbeitsraumes das Sichtgehäuse bilden, ist auch der Energieaufwand erheblich.In EP1 247 580 A2 a Kreislaufmahleinrichtung with a high-pressure roller mill and a classifier is known, which are arranged within two fixed side walls and an intermediate rotatably mounted, rotatable in the direction of rotation material feed ring for an internal Gutstoffkreislauf. In the space below the nip of the roller mill, a static cascade classifier with V-shaped baffles is placed, and classifying air is introduced through a feed housing in one of the side walls into the space below the roller mill. The static cascade classifier acts as disagglomerator for the roller press rams. The classifying air laden with fine material is led out via the side walls, while the coarse material particles enter the rotating material conveying ring and are fed again to the roller mill. The static cascade classifier can still be followed by a dynamic classifier. This device has a relatively large height. Since the side walls of the working space form the viewing housing in the static as well as the dynamic classifier, the energy consumption is also considerable.

Aus GB 428 237 ist eine Wälzmühle bekannt, welche zum Mischen von Materialien und auch zur Zerkleinerung, beispielsweise von Erzen, eingesetzt wird. Die Wälzmühle weist in Höhe der Mahlschüssel eine Austragsöffnung in der Mahlraumwand für das zerkleinerte Mahlgut auf. Der horizontale Mahlgutaustrag erfolgt mit Hilfe von an der Unterseite der Mahlschüssel angeordneten Ventilatorflügeln. Der Mahlprozess und der Zerkleinerungsgrad werden von der Ausbildung des dicht an die Mahlschüssel angrenzenden Gehäuses bzw. der Mahlraumwand, der horizontalen Austragsöffnung, den verstellbaren Ventilatorflügeln und von zwischen den Mahlwalzen angeordneten, vertikalen Deflektoren bestimmt. Eine alternativ ausgebildete Mühle weist neben der horizontalen Austragsöffnung noch Öffnungen unterhalb der Mahlschüssel auf. In diese gelangt das über den Mahlschüsselrand und in den Ringspalt zwischen der Mahlschüssel und dem unteren Mühlenteil fallende, zerkleinerte Material, welches dann mechanisch oder mit Hilfe von Gebläsen der weiteren Behandlung zugeführt wird.Out GB 428,237 For example, a roller mill is known which is used for mixing materials and also for comminution, for example ores. The roller mill has, at the level of the grinding bowl, a discharge opening in the grinding space wall for the comminuted material to be ground. The horizontal Mahlgutaustrag done with the help of arranged on the underside of the grinding bowl fan blades. The grinding process and the degree of comminution are determined by the design of the housing adjacent the grinding bowl or the grinding chamber wall, the horizontal discharge opening, the adjustable fan blades and vertical deflectors arranged between the grinding rolls. An alternative formed mill has next to the horizontal Discharge opening still openings below the grinding bowl. In this passes over the Mahlschüsselrand and into the annular gap between the grinding bowl and the lower part of the mill falling, crushed material, which is then fed mechanically or by means of blowers for further treatment.

Der Erfindung liegt die Aufgabe zugrunde, eine Wälzmühle derart auszubilden, dass ein mechanischer oder pneumatischer Transport des zerkleinerten Mahlgutes zu einem Sicht- oder Siebsystem entfallen und die gewünschte Kornfraktion mit einem relativ geringen Energieaufwand erreicht werden kann.The invention has for its object to form a roller mill such that a mechanical or pneumatic transport of the crushed ground material accounts for a visual or screening system and the desired grain fraction can be achieved with a relatively low energy consumption.

Erfindungsgemäß wird die Aufgabe durch die Merkmale des Anspruchs 1 gelöst. Zweckmäßige und vorteilhafte Ausgestaltungen sind in den Unteransprüchen und in der Figurenbeschreibung enthalten.According to the invention the object is achieved by the features of claim 1. Advantageous and advantageous embodiments are contained in the subclaims and in the description of the figures.

Ein Grundgedanke der Erfindung kann darin gesehen werden, unterhalb des Mahlraums einen Sichtapparat anzuordnen, in welchem das auf der Mahlschüssel zerkleinerte und über den Mahlschüsselrand infolge der Schwerkraft nach unten fallende, zerkleinerte Mahlgut einer Sichtung unterzogen und in eine Feingut- und Grobgutfraktion getrennt wird.A basic idea of the invention can be seen in the fact that a viewing apparatus is arranged below the grinding chamber, in which the comminuted grinding stock which has been crushed on the grinding bowl and falls downwards over the grinding bowl edge as a result of gravity is subjected to a screening and separated into a fine material and coarse material fraction.

Die Sichtung erfolgt mit Hilfe eines Gas- bzw. Luftstroms, nachfolgend Sichtluftstrom genannt, welcher der Sichteinrichtung über eine untere Ringkammer zugeführt und mit Feingut beladen, ausgetragen wird. Die groberen Mahlgutpartikel gelangen über einen Grobgutaustrag aus der Sichteinrichtung, welche für eine "Down"-Sichtung in die Wälzmühle integriert ist.The sighting takes place with the aid of a gas or air stream, referred to below as the classifying air stream, which is fed to the classifying device via a lower annular chamber and loaded with fine material. The coarser material particles pass through a coarse material discharge from the viewing device, which is integrated into the roller mill for a "down" direction.

Eine Energieeinsparung wird erreicht, da eine Förderung des zerkleinerten Mahlgutes zu einem Sichter oder zu einem Siebsystem außerhalb der Mühle entfällt. Auch ist keine kinetische Energie erforderlich, da die Fallenergie der Mahlgutpartikel, welche über den Mahlschüsselrand abgeworfen werden, ausgenutzt wird.An energy saving is achieved because a promotion of the comminuted material to be ground to a sifter or to a screening system outside the mill is eliminated. Also, no kinetic energy is required, since the falling energy of Mahlgutpartikel which are dropped over the Mahlschüsselrand exploited.

Es ist vorteilhaft, dass die Sichteinrichtung und die Ringkammer zylindrisch um einen unteren Bereich der Mahlschüssel angeordnet sind und wenigstens eine Eintrittsöffnung für den Sichtluftstrom sowie wenigstens ein Feingutaustrag und ein Grobgutaustrag in der Ringkammer bzw. Wandung der Sichteinrichtung ausgebildet sind.It is advantageous that the viewing device and the annular chamber are arranged cylindrically around a lower region of the grinding bowl and at least one inlet opening for the classifying air stream and at least one fine material discharge and a coarse material discharge are formed in the annular chamber or wall of the classifying device.

Die Sichteinrichtung unterhalb des Mahlraums kann für eine statische und/oder dynamische Sichtung ausgebildet sein. Beispielsweise können dynamische Sichtrotoren im Bereich des Ringraumes angeordnet sein, welche eine horizontale oder vertikale Drehachse aufweisen.The viewing device below the grinding chamber can be designed for a static and / or dynamic sighting. For example, dynamic classifying rotors may be arranged in the region of the annular space, which have a horizontal or vertical axis of rotation.

Vorteilhaft ist eine statische Sichteinrichtung, welche als Jalousie-Sichter ausgebildet ist und geneigte, sich überlappende Lamellen aufweist. Diese Jalousie-Sichter können mit einer relativ hohen Staubkonzentration betrieben werden. Indem bezogen auf das Mahlgut weniger Gas benötigt wird, wird eine weitere Energieeinsparung erreicht.Advantageous is a static viewing device, which is designed as a blind sifter and has inclined, overlapping lamellae. These blinds classifiers can be operated with a relatively high dust concentration. By requiring less gas relative to the regrind, further energy savings are achieved.

Zweckmäßigerweise sind die Lamellen der als Jalousie ausgebildeten Sichteinrichtung schräg nach unten und außen gerichtet. Das über den Mahlschüsselrand abgeworfene Mahlgut, welches unter dem Einfluss der kostenlosen Fallenergie in die Sichteinrichtung fällt, trifft auf die sich überlappenden Lamellen, wobei der Massenstrom beim Auftreffen auf jede Lamelle abgebremst und aufgrund der Neigung über die Kante zur nächsten Lamelle geleitet wird. Der eingeleitete Sichtluftstrom strömt durch die Jalousie und den Mahlgut-Vorhang. Dabei werden die feineren Partikel nach außen gelenkt und verlassen die Sichteinrichtung mit dem Sichtluftstrom durch den Feingutaustrag. Die gröberen Partikel fallen nach unten in Richtung Grobgutaustrag, welcher in einem bodenseitigen Bereich der Sichterwandung angeordnet ist.Conveniently, the slats of the shutter device designed as a blind are directed obliquely downwards and outwards. The ground material dropped over the grinding bowl edge, which falls under the influence of the free falling energy into the sighting device, strikes the overlapping lamellae, wherein the mass flow slows down when hitting each lamella and due to the inclination over the Edge is led to the next slat. The introduced classifying air flow flows through the blind and the regrind curtain. The finer particles are directed outwards and leave the sighting device with the classifying air flow through the fines discharge. The coarser particles fall down in the direction Grobgutaustrag, which is arranged in a bottom region of the Sichterwandung.

Es ist vorteilhaft, dass die Größe der zum Feingutaustrag umgelenkten Partikel durch die Gasmenge und die daraus resultierenden Geschwindigkeiten zwischen den Lamellen beeinflusst werden kann. Wenn der Feingut-Gasstrom nach den Lamellen eine Umlenkung von z.B. etwa 90° erfährt, wird ein zusätzlicher Trenneffekt erreicht.It is advantageous that the size of the particles deflected to the fines discharge can be influenced by the amount of gas and the resulting speeds between the fins. If the fines gas stream downstream of the fins has a deflection of e.g. experiences about 90 °, an additional separation effect is achieved.

Um zu verhindern, dass Sichtluft bzw. -gas in den Ring- und Mahlraum entgegen dem nach unten fallenden, zerkleinerten Mahlgut gelangen kann, sind Abdeckelemente angeordnet, welche die Ringraumöffnung axial und/oder ringsegmentartig begrenzen können und zur Abdichtung dienen. Zweckmäßigerweise sind die Abdeckelemente in Form von Klappen oder Ringsegmenten ausgebildet und begrenzen die Ringraumöffnung derart, dass diese vollständig vom über dem Mahlschüsselrand abgeworfenen Mahlgutstrom ausgefüllt wird. Die Abdeckelemente sind zweckmäßig verstellbar, insbesondere um eine horizontale Achse verschwenkbar, an der Mahlraumwand befestigt.In order to prevent the classifying air or gas from entering the ring and grinding chamber against the crushed ground material falling downwards, cover elements are arranged which can limit the annular space opening axially and / or ring segment-like and serve for sealing. The cover elements are expediently designed in the form of flaps or ring segments and delimit the annular space opening in such a way that it is completely filled by the ground material flow dropped over the grinding bowl edge. The cover elements are expediently adjustable, in particular pivotable about a horizontal axis, attached to the grinding chamber wall.

Wälzmühlen in Modulbauweise nach dem LOESCHE-Prinzip, welche separat auf Mühlenständern abgestützte und schwenkbar gelagerte Mahlwalzen aufweisen, werden mit einer Sichteinrichtung ausgestattet, welche jeweils Sichtbereiche zwischen den Mühlenständern aufweist. In jedem Sichtbereich ist dann koaxial und außenseitig ein Feingutaustrag, beispielsweise ein Stutzen, und bodenseitig ein Grobgutaustrag angeordnet, deren Zusammenführung außerhalb der Mühle erfolgt.Roller mills in modular design according to the LOESCHE principle, which separately supported on mill stands and pivotally mounted grinding rollers are equipped with a viewing device, which each has viewing areas between the mill stands. In each field of view is then coaxial and outside a fines discharge, for example a nozzle, and arranged on the bottom side Grobgutaustrag, the merging takes place outside the mill.

Die Ringkammer im unteren Bereich der Mahlschüssel umschließt diese vollständig, wobei die Abdichtung zu der rotierenden Mahlschüssel durch eine Labyrinth-/Spaltdichtung erfolgen kann.The annular chamber in the lower part of the grinding bowl encloses this completely, wherein the seal can be done to the rotating grinding bowl by a labyrinth / gap seal.

In den Bereichen der Mühlenständer ist jeweils zwischen den einzelnen Sichtbereichen, welche vorteilhaft als Jalousien ausgebildet sein können, ein zylindrisches Teilstück bzw. eine teilzylindrische Verbindungswand angeordnet, welche bis in den oberen Bereich der Mahlschüssel reicht und hier, beispielsweise durch eine Spaltdichtung, abgedichtet wird.In the areas of the mill stands, a cylindrical section or a partially cylindrical connecting wall is arranged in each case between the individual viewing areas, which can be advantageously designed as blinds, which extends into the upper area of the grinding bowl and is sealed here, for example by a gap seal.

Zur Umlenkung des von der Mahlschüssel abgeworfenen, zerkleinerten Mahlgutes in die Sichtbereiche zwischen den Mühlenständern sind Leitbleche unterhalb der Mahlwalzen im Ringraum zwischen der Mahlschüssel und der Mahlraumwand angeordnet. Diese sind im oberen Bereich dachartig ausgebildet und auf vertikalen Leitblechen abgestützt. Die Befestigung kann an der vertikalen Verbindungswand erfolgen.For deflecting the discarded from the grinding bowl, crushed ground material in the field of view between the mill stands guide plates are arranged below the grinding rollers in the annular space between the grinding bowl and the grinding chamber wall. These are roof-like in the upper area and supported on vertical baffles. The attachment can be made on the vertical connecting wall.

Die Erfindung wird nachstehend anhand einer Zeichnung weiter erläutert; in dieser zeigen in einer stark schematisierten Darstellung

Fig. 1:
einen ausschnittsweisen Längsschnitt durch eine erfindungsgemäße Wälzmühle mit integrierter Sichteinrichtung unterhalb des Mahlraums und
Fig. 2:
eine perspektivische Darstellung der Sichteinrichtung für eine Wälzmühle in Modulbauweise mit vier Mahlwalzen/Mühlenständern.
The invention will be further explained below with reference to a drawing; in this show in a highly schematic representation
Fig. 1:
a partial longitudinal section through a roller mill according to the invention with integrated viewing device below the grinding chamber and
Fig. 2:
a perspective view of the viewing device for a roller mill in modular design with four grinding rollers / mill stands.

Fig. 1 zeigt einen Längsschnitt durch die linke Seite einer Wälzmühle im Bereich einer Mahlwalze 4, welche auf einer Mahlschüssel 2 abrollt. Die Mahlschüssel 2 rotiert um eine Drehachse 25, und das in einem Mahlspalt zwischen der Mahlwalze 4 und der Mählschüssel 2 zerkleinerte Mahlgut 7 gelangt über den Mahlschüsselrand 6 in einen Ringraum 5. Der Ringraum 5 wird von dem Mahlschüsselrand 6 und einer Mahlraumwand 3, welche im Wesentlichen vertikal ausgerichtet ist, begrenzt. Nach oben kann der Mahlraum eine Abdeckung (nicht dargestellt) aufweisen, und es kann eine Entstaubungseinrichtung angeordnet sein. Die Mühle kann jedoch auch im Open-air Betrieb gefahren werden. Fig. 1 shows a longitudinal section through the left side of a roller mill in the region of a grinding roller 4, which rolls on a grinding bowl 2. The grinding bowl 2 rotates about an axis of rotation 25, and the grinding stock 7 comminuted in a grinding gap between the grinding roll 4 and the grinding bowl 2 passes via the grinding bowl edge 6 into an annular space 5. The annular space 5 is separated from the grinding bowl edge 6 and a grinding chamber wall 3, which is in the Essentially oriented vertically, limited. Upwards, the grinding chamber can have a cover (not shown), and a dedusting device can be arranged. However, the mill can also be driven in open-air operation.

Unterhalb des Mahlschüsselrandes 6 bzw. des Ringraums 5 ist eine Sichteinrichtung 10 angeordnet, welcher ein Sichtluftstrom 12 über eine Ringkammer 11 zugeleitet wird.Below the Mahlschüsselrandes 6 and the annulus 5 a viewing device 10 is arranged, which is supplied to a classifying air stream 12 via an annular chamber 11.

Im vorliegenden Ausführungsbeispiel ist die Sichteinrichtung 10 ein statischer Jalousie-Sichter, welcher geneigte und sich überlappende Lamellen 16 aufweist.In the present embodiment, the viewing device 10 is a static blind sifter, which has inclined and overlapping lamellae 16.

Die Sichteinrichtung 10 mit den Lamellen 16 ist derart angeordnet, dass das zerkleinerte Mahlgut 7, welches über den Mahlschüsselrand 6 und den Ringraum 5 allein durch Fallenergie nach unten fällt, auf die einzelnen Lamellen 16 auftrifft, abgebremst und mit Hilfe des Sichtluftstroms 12, welcher durch die Lamellen 16 tritt, gesichtet wird. Das vom Grobgut abgetrennte Feingut gelangt mit der Sichtluft über einen Feingutaustrag 14, welcher sich nahezu über die gesamte Höhe der Sichteinrichtung 10 und koaxial zu dieser in einer Außenwand 13 erstreckt, nach außen, während das Grobgut über einen Grobgutaustrag 15 in einer bodenseitigen Wand 17 der Sichteinrichtung 10 ausgetragen wird.The sighting device 10 with the fins 16 is arranged such that the comminuted material to be ground 7, which falls on the Mahlschüsselrand 6 and the annulus 5 solely by falling energy down, impinges on the individual fins 16, braked and with the help of the Sichtluftstroms 12, which by the fins 16 occurs, is sighted. The fines separated from the coarse material passes with the classifying air via a fines discharge 14, which extends almost over the entire height of the sighting device 10 and coaxial with this in an outer wall 13, to the outside, while the coarse material via a coarse material discharge 15 in a bottom wall 17 of Viewing device 10 is discharged.

Fig. 1 verdeutlicht, dass der Feingutaustrag derart in der Außenwand 13 angeordnet ist, dass die mit Feingut beladene Sichtluft eine Umlenkung erfährt, wodurch ein zusätzlicher Trenneffekt erreicht wird. Eine Aussonderung von eventuell noch mitgerissenen Grobpartikeln kann auch durch Führungsbleche 27 bewirkt werden, welche im Feingutaustrag 14 angeordnet sind. Fig. 1 verdeutlicht des Weiteren, dass die bodenseitige Wand 17, welche innenseitig von der Ringkammer 11 und außenseitig von dem Grobgutaustrag 15 begrenzt ist, die gleiche Neigung wie die Lamellen 16 der Sichteinrichtung 10 aufweist. Fig. 1 makes it clear that the fines discharge is arranged in the outer wall 13 such that the fines laden with fine air undergoes a deflection, whereby an additional separation effect is achieved. A rejection of possibly still entrained coarse particles can also be effected by guide plates 27, which are arranged in the fines 14. Fig. 1 illustrates further that the bottom side wall 17, which is bounded on the inside of the annular chamber 11 and the outside of the coarse material discharge 15, the same inclination as the fins 16 of the sighting device 10 has.

Im Bereich des Ringraums 5 sind Abdeckelemente 18 verschwenkbar an der Mahlraumwand 3 befestigt, welche verhindern, dass Sichtluft 12 über den Ringraum 5 in den Mahlraum gelangt und dem nach unten fallenden, zerkleinerten Mahlgutes 7 entgegenwirken kann. Die in Figur 1 gezeigten zwei Positionen von Abdeckelementen 18 sind beispielhaft und können insbesondere alternativ vorgesehen sein. Die Abdeckelemente 17 können derart verschwenkt werden, dass der Ringraum 5 eine vollständig vom zerkleinerten Mahlgutstrom ausgefüllte Öffnung aufweist.In the region of the annular space 5 cover elements 18 are pivotally attached to the grinding chamber wall 3, which prevent the classifying air 12 passes through the annulus 5 in the grinding chamber and can counteract the crushed grist 7 falling down. In the FIG. 1 shown two positions of cover 18 are exemplary and may be provided in particular alternatively. The cover elements 17 can be pivoted in such a way that the annular space 5 has an opening completely filled by the comminuted grinding stock flow.

Die Ringkammer 11, welche sich in einem unteren Bereich 8 der Mahlschüssel 2 um diese erstreckt, weist eine Labyrinth-/Spaltdichtung 22 gegenüber der Mahlschüssel 2 auf.
Die Mahlraumwand 3 kann im Bereich des Mahlschüsselrandes 6 als Prallwand 24 ausgebildet sein und mit einer verschleißfesten Auskleidung (nicht dargestellt) versehen sein.The annular chamber 11, which extends in a lower region 8 of the grinding bowl 2 around this, has a labyrinth / gap seal 22 with respect to the grinding bowl 2.
The grinding chamber wall 3 may be formed in the region of the grinding bowl edge 6 as a baffle 24 and be provided with a wear-resistant lining (not shown).

Fig. 2 zeigt eine Sichteinrichtung 10 in einer perspektivischen Darstellung, welche zum Einbau unterhalb der Mahlschüssel einer Wälzmühle in Modulbauweise des LOESCHE-Typs ausgebildet ist. Die Sichteinrichtung 10 ist mit Sichtbereichen 20 versehen, welche zwischen den Mühlenständern (nicht dargestellt) angeordnet werden. Die Ringkammer 11,
in welche die Sichtluft bzw. das Sichtgas 12 eingeleitet wird, umschließt die Mahlschüssel 2 (siehe Figur 1) in einem unteren Bereich vollständig. Die Sichtbereiche 20 sind in Fig. 2 wieder Jalousien mit nach außen und unten geneigten Lamellen 16, in deren Bereich außenseitig Stutzen als Feingutaustrag 14 im Außengehäuse 13 angeordnet sind (siehe Fig. 1). Fig. 2 shows a viewing device 10 in a perspective view, which for installation below the grinding bowl of a roller mill in modular design of the LOESCHE type is trained. The sighting device 10 is provided with viewing areas 20, which are arranged between the mill stands (not shown). The annular chamber 11,
in which the classifying air or the classifying gas 12 is introduced encloses the grinding bowl 2 (see FIG. 1 ) in a lower area completely. The viewing areas 20 are in Fig. 2 Venetian blinds with slats 16 inclined outwards and downwards, in the region of which stubs are arranged on the outside as fine-material discharge 14 in the outer housing 13 (see FIG Fig. 1 ).

In den Bereichen 23 der Mühlenständer (nicht dargestellt), das heißt, unterhalb der Mahlwalzen 4 (siehe Fig. 1), sind zwischen den Sichtbereichen 20 als Außenbegrenzung teilzylindrisch ausgebildete Verbindungswände 19 vertikal angeordnet, welche bis an die Mahlschüssel 2 heranreichen und hier zu der rotierenden Mahlschüssel über eine Spaltdichtung abgedichtet sind (nicht dargestellt). Damit das von der Mahlschüssel abgeworfene, zerkleinerte Mahlgut 7 in die Sichtbereiche 20 gelangt, sind Leitbleche 21 vertikal ausgerichtet und in Form einer Dachschräge 26 angeordnet und an der zugehörigen Verbindungswand 19 befestigt. Die Lamellen 16 der Sichtbereiche 20 reichen jeweils bis zu den vertikal angeordneten Leitblechen 21.In the areas 23 of the mill stands (not shown), that is, below the grinding rollers 4 (see Fig. 1 ), are arranged vertically between the viewing areas 20 as an outer boundary part-cylindrical connecting walls 19 which reach up to the grinding bowl 2 and are sealed here to the rotating grinding bowl via a gap seal (not shown). In order for the comminuted material 7 dropped from the grinding bowl to enter the viewing areas 20, guide plates 21 are vertically aligned and arranged in the form of a roof slope 26 and fastened to the associated connecting wall 19. The lamellae 16 of the viewing areas 20 each extend to the vertically arranged baffles 21.

Claims (16)

  1. Roller mill
    having a rotary grinding bowl (2) surrounded by a grinding area wall (3) and on which roll grinding rollers (4), an annular area (5) which is bounded by a grinding bowl edge (6) and the grinding area wall (3), and at least one discharging opening for the comminuted ground material (7),
    characterized in that
    a classifying device (10) is located below the grinding bowl edge (6) and is connected with an annular chamber (11) for the supply of a classifying air flow (12)
    and
    that the classifying device (10) which receives the comminuted ground material (7) by gravity, has at least one fine material outlet (14) and a coarse material outlet (15).
  2. Roller mill according to claim 1,
    characterized in that
    the classifying device (10) and annular chamber (11) are arranged cylindrically around a lower area (8) of the grinding bowl (2).
  3. Roller mill according to claim 1 or 2,
    characterized in that
    the classifying device (10) is constructed for a static and/or dynamic classifying.
  4. Roller mill according to one of the preceding claims,
    characterized in that
    the classifying device (10) is constructed as a jalousie with sloping, overlapping blades (16).
  5. Roller mill according to claim 4,
    characterized in that
    the blades (16) of the classifying device (10) are directed in a downwardly sloping, outward manner and that the classifying air flow (12) is passed out of the annular area (11) upwards through the blades (16).
  6. Roller mill according to one of the preceding claims,
    characterized in that
    the fine material outlet (14) is located in an outer wall (13) of the classifying device (10) and virtually coaxial to the classifying device (10).
  7. Roller mill according to one of the preceding claims,
    characterized in that
    the coarse material outlet (15) is located in a bottom wall (17) of the classifying device (10).
  8. Roller mill according to one of the preceding claims,
    characterized in that
    there are cover elements (18) in or above the annular area (5) for limiting the annular area opening and for sealing against classifying air (12) from the classifying device (10).
  9. Roller mill according to claim 8,
    characterized in that
    the cover elements (18) are constructed as flaps or ring segments and fixed adjustably to the grinding area wall (3).
  10. Roller mill according to one of the preceding claims,
    characterized in that
    in the case of pivotably mounted grinding rollers (4) separately supported on mill standards, the classifying device (10) has in each case classifying areas (20) which are positioned between said standards.
  11. Roller mill according to claim 10,
    characterized in that
    in the area (23) of the mill standards is in each case provided a part cylindrical connecting wall (19) which connects the classifying areas (20) and extends into an upper area (9) of the grinding bowl (2).
  12. Roller mill according to claim 10 or 11,
    characterized in that
    below the grinding rollers (4) in the annular area (5) between the grinding bowl (2) and grinding area wall (3) are provided baffle plates (21) for supplying comminuted ground material (7) to the classifying areas (20).
  13. Roller mill according to claim 12,
    characterized in that
    the baffle plates (21) are positioned vertically in the form of a roof slope (26) and are fixed to the part cylindrical connecting walls (19).
  14. Roller mill according to one of the preceding claims,
    characterized in that
    there are gland/labyrinth packings (22) for sealing purposes in the area of the annular chamber (11) and the lower area (8) of the grinding bowl (2) and in the area of the part cylindrical connecting walls (19) and the upper area (9) of the grinding bowl (2).
  15. Roller mill according to one of the preceding claims,
    characterized in that
    the size fraction of the fine and coarse material from the classifying device (10) is adjustable with the aid of the quantity and the resulting speed of the classifying air flow (12).
  16. Roller mill according to one of the preceding claims,
    characterized in that
    the fine material-classifying air flow is deflected to the fine material outlet (14) and that in the latter guide plates (27) are provided in flow direction.
EP06806404A 2005-11-14 2006-10-19 Roller mill Expired - Fee Related EP1948360B1 (en)

Applications Claiming Priority (2)

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DE102005054209.3A DE102005054209B4 (en) 2005-11-14 2005-11-14 roller mill
PCT/EP2006/010101 WO2007054191A1 (en) 2005-11-14 2006-10-19 Roller mill

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EP1948360A1 EP1948360A1 (en) 2008-07-30
EP1948360B1 true EP1948360B1 (en) 2009-02-11

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CN (1) CN101102848A (en)
AU (1) AU2006312782B2 (en)
BR (1) BRPI0606535A2 (en)
CA (1) CA2594507C (en)
DE (2) DE102005054209B4 (en)
DK (1) DK1948360T3 (en)
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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US9212404B2 (en) 2010-03-05 2015-12-15 Loesche Gmbh Preparation method for stainless steel slags and steelworks slags for recovery of metal

Families Citing this family (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102006039775A1 (en) * 2006-08-24 2008-02-28 Khd Humboldt Wedag Gmbh Sighting device for sifting granular material and Kreislaufmahlanlage with involvement of such a viewing device
TWI483787B (en) * 2007-09-27 2015-05-11 Mitsubishi Hitachi Power Sys A grading device and an upright pulverizing device having the classifying device and a coal fired boiler device
KR101678625B1 (en) 2008-07-02 2016-11-23 뷔흘러 에이지 Apparatus and method for producing flour and/or semolina
DE102008040100A1 (en) * 2008-07-02 2010-01-07 Bühler AG Milled product fractionation device for flour mill, has channel provided with surfaces, and measuring device installed at output of zigzag separator for examination of milled quality with respect to particle size or ash content
CN101596483B (en) * 2009-06-26 2011-08-03 南京凯盛国际工程有限公司 Material grinding system
CN102397806B (en) * 2011-10-13 2015-08-26 郝志刚 Material dispersing device for vertical grinder
CN105855030B (en) * 2015-09-24 2019-03-12 佛山科学技术学院 Ceramic raw material roller mill electric and magnetic oscillation sieves feeding back device
DE102019200191A1 (en) * 2018-06-08 2019-12-12 Sms Group Gmbh Dry processing of kaolin in the production of HPA
CN111804419B (en) * 2020-06-16 2022-02-01 马鞍山采石矶涂料有限公司 Grinding device capable of automatically returning materials
CN114643104B (en) * 2022-04-02 2023-07-18 天津水泥工业设计研究院有限公司 Grinding roller blocking assembly based on vertical roller mill
CN116197008B (en) * 2023-04-04 2024-02-23 青岛锐丰源化工有限公司 Fine treatment device for chemical raw materials

Family Cites Families (22)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2045591A (en) * 1936-06-30 Method for preparing green coffee
US1789334A (en) * 1929-05-21 1931-01-20 Leonard H Englund Method and apparatus for making infusions
GB428237A (en) * 1933-11-20 1935-05-09 Josephus Wass Improvements in or relating to grinding, crushing and mixing mills
US2192076A (en) * 1939-03-08 1940-02-27 James A Grow Corn cracker and grader
US3951347A (en) * 1972-09-21 1976-04-20 Polysius Ag Apparatus for crushing material containing particles that are hard to pulverize
DD127112A1 (en) * 1976-07-30 1977-09-07
US4597537A (en) * 1982-09-14 1986-07-01 Onoda Cement Company, Ltd. Vertical mill
US4504018A (en) * 1982-12-13 1985-03-12 Foster Wheeler Energy Corporation Particle classifier apparatus and method with rudder control vane
DE4002867C1 (en) * 1990-02-01 1991-08-29 Evt Energie- Und Verfahrenstechnik Gmbh, 7000 Stuttgart, De
DE4124416A1 (en) * 1991-07-23 1993-01-28 Krupp Polysius Ag DEVICE AND METHOD FOR CRUSHING GROUND DIFFERENT GRAIN
JP2704477B2 (en) * 1992-03-09 1998-01-26 宇部興産株式会社 Vertical crusher
EP0711221B1 (en) * 1993-07-30 1997-02-26 Bayer Ag Process for powdering polyurethane, polycarbamide and/or polyurethane-polycarbamide materials in a rolling mill
US5957300A (en) * 1996-01-29 1999-09-28 Sure Alloy Steel Corporation Classifier vane for coal mills
PT1078107E (en) * 1998-04-22 2003-07-31 Anglo American Resear Lbrt Pro MINERAL FRAGMENTATION PROCESS USING A LOW PRESSURE BASE COMPRESSION METHOD AND INSTALLATION FOR THAT END
US5875977A (en) * 1998-05-13 1999-03-02 Combustion Engineering, Inc. Technique for improving the response time of pulverized coal boilers
DE10063798A1 (en) * 2000-12-21 2002-06-27 Kloeckner Humboldt Wedag Rotary grinder with high pressure rolling mill has two or more bearing rollers mounted at ends of common rocker lever and spread out round circumferential region of material conveyor ring to support same from below
US6543709B2 (en) * 2001-01-12 2003-04-08 Hosokawa Micron Powder Systems Gravity flow air classifying mill
DE10224009B4 (en) * 2002-05-29 2004-07-22 Loesche Gmbh Process for comminuting material, in particular ores, and roller mill for carrying out the process
DE60335480D1 (en) * 2002-05-29 2011-02-03 Loesche Gmbh IMPROVED DENTAL REDUCTION PROCESS AND IMPROVED DENTAL REDUCTION DEVICE
US6902126B2 (en) * 2002-11-04 2005-06-07 Alstom Technology Ltd Hybrid turbine classifier
DE10329053A1 (en) * 2003-06-27 2005-01-13 Khd Humboldt Wedag Ag Kreislaufmahlanlage with mill and classifier
US7267293B2 (en) * 2005-05-13 2007-09-11 Alstom Technology Ltd High efficiency bowl mill

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US9212404B2 (en) 2010-03-05 2015-12-15 Loesche Gmbh Preparation method for stainless steel slags and steelworks slags for recovery of metal

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RU2374000C2 (en) 2009-11-27
CN101102848A (en) 2008-01-09
DK1948360T3 (en) 2009-06-02
RU2007126382A (en) 2009-02-27
DE102005054209B4 (en) 2014-05-28
AU2006312782A1 (en) 2007-05-18
EP1948360A1 (en) 2008-07-30
MX2007009130A (en) 2007-11-21
US7690591B2 (en) 2010-04-06
BRPI0606535A2 (en) 2009-06-30
US20080296422A1 (en) 2008-12-04
DE502006002854D1 (en) 2009-03-26
DE102005054209A1 (en) 2007-05-24
WO2007054191A1 (en) 2007-05-18
AU2006312782B2 (en) 2010-12-23
ZA200705236B (en) 2008-07-30
CA2594507C (en) 2012-05-29
CA2594507A1 (en) 2007-05-18

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