[go: up one dir, main page]

EP0374491B1 - Sifter - Google Patents

Sifter Download PDF

Info

Publication number
EP0374491B1
EP0374491B1 EP89121348A EP89121348A EP0374491B1 EP 0374491 B1 EP0374491 B1 EP 0374491B1 EP 89121348 A EP89121348 A EP 89121348A EP 89121348 A EP89121348 A EP 89121348A EP 0374491 B1 EP0374491 B1 EP 0374491B1
Authority
EP
European Patent Office
Prior art keywords
separator
rotor
distributor
grinding
material distributor
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
EP89121348A
Other languages
German (de)
French (fr)
Other versions
EP0374491A3 (en
EP0374491A2 (en
Inventor
Michael Dr.-Ing. Von Seebach
Norbert Dipl.-Ing. Patzelt
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
ThyssenKrupp Industrial Solutions AG
Original Assignee
Krupp Polysius AG
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 Krupp Polysius AG filed Critical Krupp Polysius AG
Publication of EP0374491A2 publication Critical patent/EP0374491A2/en
Publication of EP0374491A3 publication Critical patent/EP0374491A3/en
Application granted granted Critical
Publication of EP0374491B1 publication Critical patent/EP0374491B1/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
    • B02C23/00—Auxiliary methods or auxiliary devices or accessories specially adapted for crushing or disintegrating not provided for in preceding groups or not specially adapted to apparatus covered by a single preceding group
    • B02C23/18—Adding fluid, other than for crushing or disintegrating by fluid energy
    • B02C23/20—Adding fluid, other than for crushing or disintegrating by fluid energy after crushing or disintegrating
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B02—CRUSHING, PULVERISING, OR DISINTEGRATING; PREPARATORY TREATMENT OF GRAIN FOR MILLING
    • B02C—CRUSHING, PULVERISING, OR DISINTEGRATING IN GENERAL; MILLING GRAIN
    • B02C13/00—Disintegrating by mills having rotary beater elements ; Hammer mills
    • B02C13/14—Disintegrating by mills having rotary beater elements ; Hammer mills with vertical rotor shaft, e.g. combined with sifting devices
    • B02C13/18—Disintegrating by mills having rotary beater elements ; Hammer mills with vertical rotor shaft, e.g. combined with sifting devices with beaters rigidly connected to the rotor
    • B02C13/1807—Disintegrating by mills having rotary beater elements ; Hammer mills with vertical rotor shaft, e.g. combined with sifting devices with beaters rigidly connected to the rotor the material to be crushed being thrown against an anvil or impact plate
    • B02C13/1835—Disintegrating by mills having rotary beater elements ; Hammer mills with vertical rotor shaft, e.g. combined with sifting devices with beaters rigidly connected to the rotor the material to be crushed being thrown against an anvil or impact plate by means of beater or impeller elements fixed in between an upper and lower rotor disc
    • B02C13/1842—Disintegrating by mills having rotary beater elements ; Hammer mills with vertical rotor shaft, e.g. combined with sifting devices with beaters rigidly connected to the rotor the material to be crushed being thrown against an anvil or impact plate by means of beater or impeller elements fixed in between an upper and lower rotor disc with dead bed protected beater or impeller elements
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B02—CRUSHING, PULVERISING, OR DISINTEGRATING; PREPARATORY TREATMENT OF GRAIN FOR MILLING
    • B02C—CRUSHING, PULVERISING, OR DISINTEGRATING IN GENERAL; MILLING GRAIN
    • B02C21/00—Disintegrating plant with or without drying of the material
    • B02C21/002—Disintegrating plant with or without drying of the material using a combination of a roller mill and a drum mill
    • B02C21/005—Disintegrating plant with or without drying of the material using a combination of a roller mill and a drum mill the roller mill having cooperating rollers
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B02—CRUSHING, PULVERISING, OR DISINTEGRATING; PREPARATORY TREATMENT OF GRAIN FOR MILLING
    • B02C—CRUSHING, PULVERISING, OR DISINTEGRATING IN GENERAL; MILLING GRAIN
    • B02C23/00—Auxiliary methods or auxiliary devices or accessories specially adapted for crushing or disintegrating not provided for in preceding groups or not specially adapted to apparatus covered by a single preceding group
    • B02C23/08—Separating or sorting of material, associated with crushing or disintegrating
    • B02C23/10—Separating or sorting of material, associated with crushing or disintegrating with separator arranged in discharge path of crushing or disintegrating zone
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B07—SEPARATING SOLIDS FROM SOLIDS; SORTING
    • B07B—SEPARATING SOLIDS FROM SOLIDS BY SIEVING, SCREENING, SIFTING OR BY USING GAS CURRENTS; SEPARATING BY OTHER DRY METHODS APPLICABLE TO BULK MATERIAL, e.g. LOOSE ARTICLES FIT TO BE HANDLED LIKE BULK MATERIAL
    • B07B7/00—Selective separation of solid materials carried by, or dispersed in, gas currents
    • B07B7/08—Selective separation of solid materials carried by, or dispersed in, gas currents using centrifugal force
    • B07B7/083—Selective separation of solid materials carried by, or dispersed in, gas currents using centrifugal force generated by rotating vanes, discs, drums, or brushes
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B02—CRUSHING, PULVERISING, OR DISINTEGRATING; PREPARATORY TREATMENT OF GRAIN FOR MILLING
    • B02C—CRUSHING, PULVERISING, OR DISINTEGRATING IN GENERAL; MILLING GRAIN
    • B02C13/00—Disintegrating by mills having rotary beater elements ; Hammer mills
    • B02C13/14—Disintegrating by mills having rotary beater elements ; Hammer mills with vertical rotor shaft, e.g. combined with sifting devices
    • B02C13/18—Disintegrating by mills having rotary beater elements ; Hammer mills with vertical rotor shaft, e.g. combined with sifting devices with beaters rigidly connected to the rotor
    • B02C13/1807—Disintegrating by mills having rotary beater elements ; Hammer mills with vertical rotor shaft, e.g. combined with sifting devices with beaters rigidly connected to the rotor the material to be crushed being thrown against an anvil or impact plate
    • B02C2013/1885—Disintegrating by mills having rotary beater elements ; Hammer mills with vertical rotor shaft, e.g. combined with sifting devices with beaters rigidly connected to the rotor the material to be crushed being thrown against an anvil or impact plate of dead bed type

Definitions

  • the invention relates to a classifier according to the preamble of claim 1.
  • a classifier according to the preamble of claim 1 is known for example from EP-A-0 221 246.
  • the material distributor designed as a plate is located directly on the top of the rotor and can be rotated together with the rotor.
  • a crop distributor on the top of the classifier rotor is rotatably formed with it, this crop distributor is also provided with a plurality of vertically and radially aligned blades and around this crop distributor with radial Distance is provided a grooved housing liner ring with which the wings cooperate to break up and crush agglomerated masses of the powdered material supplied before it falls into the ring-shaped visual space below.
  • the coarse material which has been freed of fine particles, falls downward onto an annular disk by gravity and is discharged to the outside through an outer annular chamber due to the centrifugal action of this rotating disk.
  • FIG. 1 Another sifter design, which also does not fall under the preamble of claim 1, is described in connection with a comminution system in EP-A-0 237 641.
  • the viewing area is located in the vertical-axis classifier in a middle height area of the housing between a fixed guide device (blind ring) below. for sight air entry and an overhead rotating sight system.
  • a regrind feed plate with impact elements is arranged centrally in this viewing area, which is driven separately and, in addition to distributing the crop, is intended to have a dissolving grinding effect on regrind agglomerates.
  • the invention has for its object to design a classifier according to the preamble of claim 1 so that it can be used particularly advantageously in grinding plants equipped with a material bed roller mill, in which the discharged from the material bed roller mill, in particular in the form of flakes Grist often contains a high proportion of fine material and should therefore be optimally deagglomerated.
  • a crusher is already known from EP-A-276 849, in which a centrifugal rotor is arranged, which is surrounded at a radial distance by an annular chamber open towards the rotor.
  • this is a pure crusher for the relatively coarse comminution of stones without reference to a classifier or to grinding plants equipped with a material bed roller mill.
  • the crop distributor is driven independently of the rotor by means of a separate drive device, and on the other hand, this crop distributor is surrounded at a radial distance by an annular chamber which is open towards the crop distributor and which represents an impact and deagglomeration zone and in which there is wear protection training effective bulk goods.
  • the material to be sifted which is preferably the material to be discharged from a material bed roller mill, can be optimally dissolved and evened out by being thrown into the annular chamber.
  • the fact that the speed of the crop distributor can be selected independently of that of the rotor also contributes to this optimal deagglomeration of the slugs.
  • the crop distributor is designed in accordance with the invention in such a way that the dissolution of the crop and the uniform spreading into the viewing space are promoted.
  • the sifter 1 illustrated in FIGS. 1-3 contains a driven rotor 2 with a vertical axis, which has blades 3 arranged on its circumference at a distance from one another.
  • the rotor 2 is surrounded by a stationary diffuser 4, which contains adjustable guide vanes and via which a visible air flow supplied by means of an inlet spiral 5 enters the viewing space 6 between the diffuser 4 and the rotor 2.
  • the rotor 2 is driven from below by a drive motor (not shown) via a shaft 8 which is mounted above the rotor 2 in a bearing 10 carried by radial webs 9.
  • a coarse material hopper 11 for discharging the coarse material dropping out of the viewing space 6 is located below the rotor 2 and guide apparatus 4.
  • a channel 12 adjoins the open lower end face of the rotor 2, which is used to discharge the fine air laden with fine air.
  • a crop distributor 13 is arranged at a distance above the rotor 2 and is driven independently of the rotor 2 by a separate drive motor 14 via a belt drive 15 and a hollow shaft 16.
  • the hollow shaft 16 is supported in bearings 17, 18.
  • the crop distributor 13 contains a plate-shaped base plate 19 and an annular cover plate 20. Between the base plate 19 and the cover plate 20 there are a number (for example three) guide webs 21 which are inclined in relation to the radial position in the direction of rotation (arrow 22) of the crop distributor. Holding elements 23, 24 are provided in the region of the ends of the guide webs 21. Support plates 25 support the guide webs 21 from the outside.
  • annular crop inlet opening 26 Between the annular cover plate 20 of the crop distributor 13 and the shaft 16 there is an annular crop inlet opening 26, through which the crop fed, for example by means of a conveyor belt 27 and a feed chute 28, is fed to the crop distributor 13.
  • the crop distributor 13 is surrounded at a radial distance by an annular chamber 29 which is open towards the crop distributor 13 and which represents a baffle and deagglomeration zone for the crop thrown outwards by the crop distributor 13. Since the annular chamber 29 has a base 30, a bed of material 31 forms in this annular chamber 29, onto which the material thrown off by the material distributor 13 strikes and which thus serves as wear protection works.
  • a good cushion is formed on the guide webs 21 of the material distributor 13 - significantly favored by the accumulation effect exerted by the holding elements 23, 24 - onto which the material entering through the material inlet opening 26 into the material distributor 13 and flung outward in the radial direction Impact good particles. In this way, the wear on the surfaces coming into contact with the good agglomerates is significantly reduced.
  • the function of the classifier according to FIGS. 1-3 is summarized as follows:
  • the material to be sifted (preferably the material to be discharged from a material bed roller mill) is fed to the material distributor 13, thrown by it into the annular chamber 29 and optimally dissolved and homogenized in this impact and deagglomeration zone.
  • the material distributor 13 thrown by it into the annular chamber 29 and optimally dissolved and homogenized in this impact and deagglomeration zone.
  • the material to be sifted preferably the material to be discharged from a material bed roller mill
  • the speeds (and, if necessary, the direction of rotation) of rotor 2 and crop distributor 13 can be selected differently, so that both the deagglomeration and the sighting can be optimally adjusted to match the crop.
  • feed chutes 28 can be arranged.
  • screws can also be provided for feeding the ground material.
  • a feed hopper 33 contains a feed hopper 33, a material bed roller mill 34, a circulating bucket elevator 35, a classifier 1 (corresponding to FIGS. 1-3) which is also designed as a deagglomerator, a separator 36 and a circulating air fan 37.
  • the coarse material discharged via the coarse material hopper 11 of the classifier 1 is returned in the grinding system according to FIG. 4 via a return 38 to the inlet shaft 39 of the material bed roller mill 34.
  • the fine material separated from the classifying air stream in the separator 36 forms the finished product (line 40). 4 thus shows the diagram of a pure circular grinding with a material bed roller mill 34. Since the scraps discharged from the roller mill 34 take place in the material distributor of the classifier 1, a separate disagglomeration device is unnecessary; at the same time, the funding path is shortened.
  • a fine mill preferably designed as a tube mill 41, which contains the coarse material discharged via the coarse material hopper 11 of the classifier 1 is fed.
  • the common discharge of the tube mill 41 and the separator 36 forms the finished product (line 42).
  • returns 43, 44 indicated by dashed lines in FIG. 5, via which - alternatively or additionally - material discharged from the material bed roller mill 34 (return 43) and / or material discharged via the coarse material hopper 11 of the classifier 1 (return 44) can be returned to the inlet shaft 39 of the material bed roller mill 34.
  • FIG. 5 thus shows a grinding system with pre-grinding in the material bed roller mill 34 and fine grinding in the continuous tube mill 41, alternatively with semolina and / or slurry return to the material bed roller mill.
  • the disagglomeration of the slugs in sifter 1 results in a significant simplification of the system and a significant reduction in operating costs.
  • the grinding system illustrated in FIG. 6 contains the same elements as the system according to FIG. 5. As with the grinding system according to FIG. 4, all of the coarse material discharged via the coarse material hopper 11 of the classifier 1 is returned to the material bed roller mill 34, while that in the separator 36 separated material is still subjected to regrinding in tube mill 41.
  • a circulation bucket elevator 45 is provided, which returns the discharge of the tube mill 41 to the feed chute 28 of the classifier 1, so that it together with the discharge material Material bed roller mill 34 reaches the material distributor 13 of the classifier 1.
  • the finished product is withdrawn from separator 36 (line 46).
  • FIG. 8 finally shows a grinding plant which, in addition to the plant parts illustrated in FIG. 5, also contains a circulation bucket elevator 45, a further classifier 47 and a separator 48.
  • the sifter 47 is - in contrast to the sifter 1 - designed in the usual way, i. H. provided with a single drive motor through which the rotor and a suitably designed spreading disc are driven.
  • the ground material discharged from the tube mill 41 is fed to the sifter 47 via the circulating bucket elevator 45.
  • the coarse material separated in the sifter 47 is again fed (together with the discharge material from the separator 36) to the tube mill 41, while the fine material discharged from the sifter 47 forms the finished product after separation in the separator 48.
  • FIG. 9 shows a variant of the supply of goods to the distributor 13, which is particularly suitable for larger versions.
  • the supply of goods takes place here through the correspondingly large shaft 16, via which the crop distributor is driven by the drive motor 14.
  • the material thus reaches the material distributor 13 centrally and is thrown outwards by it in the manner already explained and is deagglomerated in the annular chamber 29.

Landscapes

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

Description

Die Erfindung betrifft einen Sichter entsprechend dem Oberbegriff des Anspruches 1.The invention relates to a classifier according to the preamble of claim 1.

Ein Sichter gemäß dem Oberbegriff des Anspruches 1 ist beispielsweise durch die EP-A-0 221 246 bekannt. Der als Teller ausgebildete Gutverteiler befindet sich bei diesem bekannten Sichter unmittelbar auf der Oberseite des Rotors und ist gemeinsam mit dem Rotor drehbar.A classifier according to the preamble of claim 1 is known for example from EP-A-0 221 246. In this known classifier, the material distributor designed as a plate is located directly on the top of the rotor and can be rotated together with the rotor.

Auch bei einer anderen bekannten Sichterausführung (US-A-30 15 392) ist ein Gutverteiler an der Oberseite des Sichterrotors drehfest mit ihm ausgebildet, wobei dieser Gutverteiler noch mit einer Vielzahl von vertikal und radial ausgerichteten Flügeln versehen ist und um diesen Gutverteiler herum mit radialem Abstand ein mit Rillen versehener Gehäuse-Auskleidungsring vorgesehen ist, mit dem die Flügel zusammenwirken, um agglomerierte Massen des zugeführten pulverförmigen Gutes aufzubrechen und zu zerkleinern, bevor es in den darunterliegenden ringförmigen Sichtraum fällt. Das von Feingutteilchen befreite Grobgut fällt durch Schwerkraft nach unten auf eine Ringscheibe und wird durch die Zentrifugalwirkung dieser rotierenden Scheibe durch eine äußere Ringkammer nach außen ausgetragen.In another known classifier design (US-A-30 15 392), a crop distributor on the top of the classifier rotor is rotatably formed with it, this crop distributor is also provided with a plurality of vertically and radially aligned blades and around this crop distributor with radial Distance is provided a grooved housing liner ring with which the wings cooperate to break up and crush agglomerated masses of the powdered material supplied before it falls into the ring-shaped visual space below. The coarse material, which has been freed of fine particles, falls downward onto an annular disk by gravity and is discharged to the outside through an outer annular chamber due to the centrifugal action of this rotating disk.

Eine andere, ebenfalls nicht unter den Oberbegriff des Anspruches 1 fallende Sichterausfuhrung ist im Zusammenhang mit einer Zerkleinerungsanlage in der EP-A-0 237 641 beschrieben. In diesem Falle befindet sich in dem vertikalachsigen Sichter der Sichtraum in einem mittleren Höhenbereich des Gehäuses zwischen einem untenliegenden, feststehenden Leitapparat (Jalousiekranz) für den Sichtlufteintritt und einem obenliegenden rotierenden Sichtsystem. In diesem Sichtraum ist zentral ein mit Prallelementen besetzter Mahlgut-Aufgabeteller angeordnet, der gesondert angetrieben ist und neben der Gutverteilung eine auflösende Mahlwirkung auf Mahlgut-Agglomerate ausüben soll.Another sifter design, which also does not fall under the preamble of claim 1, is described in connection with a comminution system in EP-A-0 237 641. In this case, the viewing area is located in the vertical-axis classifier in a middle height area of the housing between a fixed guide device (blind ring) below. for sight air entry and an overhead rotating sight system. A regrind feed plate with impact elements is arranged centrally in this viewing area, which is driven separately and, in addition to distributing the crop, is intended to have a dissolving grinding effect on regrind agglomerates.

In der nicht vorveröffentlichten älteren europäischen Patentanmeldung gemäß EP-A-0 350 616 ist ein Sichter zum Sichten von ggf. agglomeriertem Gut beschrieben, das von einer Gutbett-Walzenmühle kommend einem als Schleuder-Streuteller ausgebildeten Gutverteiler aufgegeben wird, der von einem etwa zylindrischen Anwurfring umgeben ist, damit nach außen geschleudertes agglomeriertes Aufgabegut aufgelöst werden kann. Zum Abführen des durch den Sichtraum nach unten hin durchfallenden Grobgutes ist bei diesem Sichter eine schräg und offensichtlich ringförmig angeordnete pneumatische Förderrinne vorgesehen.In the older European patent application according to EP-A-0 350 616, which has not been published beforehand, a classifier for classifying possibly agglomerated material is described which, coming from a material bed roller mill, is fed to a material distributor designed as a spreader-type spreading disc, which is provided by an approximately cylindrical starting ring is surrounded so that agglomerated feed material that is thrown out can be dissolved. In order to discharge the coarse material falling through the viewing space downwards, an oblique and obviously ring-shaped pneumatic conveying trough is provided in this classifier.

Der Erfindung liegt die Aufgabe zugrunde, einen Sichter entsprechend dem Oberbegriff des Anspruches 1 so auszubilden, daß er besonders vorteilhaft in mit einer Gutbett-Walzenmühle ausgerüsteten Mahlanlagen Verwendung finden kann, in denen das aus der Gutbett-Walzenmühle ausgetragene, insbesondere in Form von Schülpen vorliegende Mahlgut vielfach einen hohen Anteil Feingut enthält und daher optimal desagglomeriert werden soll.The invention has for its object to design a classifier according to the preamble of claim 1 so that it can be used particularly advantageously in grinding plants equipped with a material bed roller mill, in which the discharged from the material bed roller mill, in particular in the form of flakes Grist often contains a high proportion of fine material and should therefore be optimally deagglomerated.

Diese Aufgabe wird erfindungsgemäß durch das kennzeichnende Merkmal des Anspruches 1 gelöst. Zweckmäßige Ausgestaltungen der Erfindung sind Gegenstand der Unteransprüche.This object is achieved by the characterizing feature of claim 1. Appropriate embodiments of the invention are the subject of the dependent claims.

Aus der EP-A-276 849 ist zwar bereits ein Brecher bekannt, in dem ein Schleuderrotor angeordnet ist, der mit radialem Abstand von einer zum Rotor hin offenen Ringkammer umgeben ist. Hierbei handelt es sich jedoch um einen reinen Brecher zur relativ groben Zerkleinerung von Steinen ohne Bezug auf einen Sichter bzw. auf mit einer Gutbett-Walzenmühle ausgerüstete Mahlanlagen.A crusher is already known from EP-A-276 849, in which a centrifugal rotor is arranged, which is surrounded at a radial distance by an annular chamber open towards the rotor. However, this is a pure crusher for the relatively coarse comminution of stones without reference to a classifier or to grinding plants equipped with a material bed roller mill.

Bei dem erfindungsgemäßen Sichter ist zum einen der Gutverteiler unabhängig vom Rotor mittels einer gesonderten Antriebseinrichtung angetrieben, und zum andern ist dieser Gutverteiler mit radialem Abstand von einer zum Gutverteiler hin offenen Ringkammer umgeben, die eine Prall- und Desagglomerationszone darstellt und in der sich eine als Verschleißschutz wirkende Gutschüttung ausbildet. Durch diese Merkmalskombination kann das zu sichtende Gut, das vorzugsweise das Austragsgut einer Gutbett-Walzenmühle ist, durch das Einschleudern in die Ringkammer optimal aufgelöst und vergleichmäßigt werden. Zu dieser optimalen Desagglomeration der Schülpen trägt auch die Tatsache bei, daß die Drehzahl des Gutverteilers unabhängig von der des Rotors entsprechend gewählt werden kann. In konstruktiver Hinsicht wird der Gutverteiler erfindungsgemäß so ausgebildet, daß die Auflösung des Gutes und die gleichmäßige Einstreuung in den Sichtraum begünstigt wird.In the classifier according to the invention, on the one hand, the crop distributor is driven independently of the rotor by means of a separate drive device, and on the other hand, this crop distributor is surrounded at a radial distance by an annular chamber which is open towards the crop distributor and which represents an impact and deagglomeration zone and in which there is wear protection training effective bulk goods. Through this combination of features, the material to be sifted, which is preferably the material to be discharged from a material bed roller mill, can be optimally dissolved and evened out by being thrown into the annular chamber. The fact that the speed of the crop distributor can be selected independently of that of the rotor also contributes to this optimal deagglomeration of the slugs. From a constructive point of view, the crop distributor is designed in accordance with the invention in such a way that the dissolution of the crop and the uniform spreading into the viewing space are promoted.

Die Erfindung wird im folgenden anhand der Zeichnungen im einzelnen erläutert. Es zeigen

Fig. 1
einen Vertikalschnitt durch ein Ausführungsbeispiel des erfindungsgemäßen Sichters,
Fig. 2
einen horizontalen Teilschnitt durch den Gutverteiler,
Fig. 3
einen Vertikal-Teilschnitt durch den Gutverteiler und den ihn umgebenden Ringraum,
Fig. 4 bis 8
Schemadarstellungen von Mahlanlagen mit dem erfindungsgemäßen Sichter,
Fig. 9
eine Variante des Sichters (Detaildarstellung).
The invention is described below with reference to the drawings explained in detail. Show it
Fig. 1
3 shows a vertical section through an exemplary embodiment of the classifier according to the invention,
Fig. 2
a horizontal partial section through the crop distributor,
Fig. 3
a partial vertical section through the material distributor and the annular space surrounding it,
4 to 8
Schematic representations of grinding plants with the classifier according to the invention,
Fig. 9
a variant of the sifter (detailed view).

Der in den Fig. 1 - 3 veranschaulichte Sichter 1 enthält einen angetriebenen Rotor 2 mit vertikaler Achse, der an seinem Umfang mit Abstand voneinander angeordnete Blätter 3 aufweist.The sifter 1 illustrated in FIGS. 1-3 contains a driven rotor 2 with a vertical axis, which has blades 3 arranged on its circumference at a distance from one another.

Der Rotor 2 wird von einem feststehenden Leitapparat 4 umgeben, der einstellbare Leitschaufeln enthält und über den ein mittels einer Eintrittsspirale 5 zugeführter Sichtluftstrom in den Sichtraum 6 zwischen Leitapparat 4 und Rotor 2 eintritt.The rotor 2 is surrounded by a stationary diffuser 4, which contains adjustable guide vanes and via which a visible air flow supplied by means of an inlet spiral 5 enters the viewing space 6 between the diffuser 4 and the rotor 2.

Der Rotor 2 wird von unten her durch einen (nicht dargestellten) Antriebsmotor über eine Welle 8 angetrieben, die oberhalb des Rotors 2 in einem von radialen Stegen 9 getragenen Lager 10 gelagert ist.The rotor 2 is driven from below by a drive motor (not shown) via a shaft 8 which is mounted above the rotor 2 in a bearing 10 carried by radial webs 9.

Unterhalb von Rotor 2 und Leitapparat 4 befindet sich ein Grobguttrichter 11 zur Abführung des aus dem Sichtraum 6 ausfallenden Grobgutes.A coarse material hopper 11 for discharging the coarse material dropping out of the viewing space 6 is located below the rotor 2 and guide apparatus 4.

An die offene untere Stirnseite des Rotors 2 schließt sich ein Kanal 12 an, der zur Abführung des mit Feingut beladenen Sichtluftstromes dient.A channel 12 adjoins the open lower end face of the rotor 2, which is used to discharge the fine air laden with fine air.

Mit Abstand oberhalb des Rotors 2 ist ein Gutverteiler 13 angeordnet, der unabhängig vom Rotor 2 durch einen gesonderten Antriebsmotor 14 über einen Riementrieb 15 und eine Hohlwelle 16 angetrieben ist. Die Hohlwelle 16 ist in Lagern 17, 18 gelagert.A crop distributor 13 is arranged at a distance above the rotor 2 and is driven independently of the rotor 2 by a separate drive motor 14 via a belt drive 15 and a hollow shaft 16. The hollow shaft 16 is supported in bearings 17, 18.

Der Gutverteiler 13 enthält eine tellerförmige Grundplatte 19 sowie eine ringförmige Deckplatte 20. Zwischen der Grundplatte 19 und der Deckplatte 20 sind eine Anzahl (beispielsweise drei) Führungsstege 21 angeordnet, die gegenüber der radialen Lage in Drehrichtung (Pfeil 22) des Gutverteilers geneigt sind. Im Bereich der Enden der Führungsstege 21 sind Halteelemente 23, 24 vorgesehen. Stützbleche 25 stützen die Führungsstege 21 nach außen ab.The crop distributor 13 contains a plate-shaped base plate 19 and an annular cover plate 20. Between the base plate 19 and the cover plate 20 there are a number (for example three) guide webs 21 which are inclined in relation to the radial position in the direction of rotation (arrow 22) of the crop distributor. Holding elements 23, 24 are provided in the region of the ends of the guide webs 21. Support plates 25 support the guide webs 21 from the outside.

Zwischen der ringförmigen Deckplatte 20 des Gutverteilers 13 und der Welle 16 ist eine ringförmige Guteintrittsöffnung 26 vorhanden, über die das beispielsweise mittels eines Förderbandes 27 und eine Aufgabeschurre 28 zugeführte Gut dem Gutverteiler 13 aufgegeben wird.Between the annular cover plate 20 of the crop distributor 13 and the shaft 16 there is an annular crop inlet opening 26, through which the crop fed, for example by means of a conveyor belt 27 and a feed chute 28, is fed to the crop distributor 13.

Der Gutverteiler 13 wird mit radialem Abstand von einer Ringkammer 29 umgeben, die zum Gutverteiler 13 hin offen ist und die eine Prall- und Desagglomerationszone für das vom Gutverteiler 13 nach außen geworfene Gut darstellt. Da die Ringkammer 29 einen Boden 30 aufweist, bildet sich in dieser Ringkammer 29 eine Gutschüttung 31 aus, auf die das vom Gutverteiler 13 abgeworfene Gut auftrifft und die somit als Verschleißschutz wirkt.The crop distributor 13 is surrounded at a radial distance by an annular chamber 29 which is open towards the crop distributor 13 and which represents a baffle and deagglomeration zone for the crop thrown outwards by the crop distributor 13. Since the annular chamber 29 has a base 30, a bed of material 31 forms in this annular chamber 29, onto which the material thrown off by the material distributor 13 strikes and which thus serves as wear protection works.

In ähnlicher Weise bildet sich auch an den Führungsstegen 21 des Gutverteilers 13 - wesentlich begünstigt durch die von den Halteelementen 23, 24 ausgeübte Stauwirkung - ein Gutpolster aus, auf das die durch die Guteintrittsöffnung 26 in den Gutverteiler 13 eintretenden und in radialer Richtung nach außen geschleuderten Gutpartikel auftreffen. Auf diese Weise wird der Verschleiß an den mit den Gutagglomeraten in Berührung kommenden Flächen wesentlich verringert.In a similar manner, a good cushion is formed on the guide webs 21 of the material distributor 13 - significantly favored by the accumulation effect exerted by the holding elements 23, 24 - onto which the material entering through the material inlet opening 26 into the material distributor 13 and flung outward in the radial direction Impact good particles. In this way, the wear on the surfaces coming into contact with the good agglomerates is significantly reduced.

Zusammengefaßt ist die Funktion des Sichters gemäß den Fig. 1 - 3 wie folgt:
Das zu sichtende Gut (vorzugsweise das Austragsgut einer Gutbett-Walzenmühle) wird dem Gutverteiler 13 aufgegeben, von diesem in die Ringkammer 29 geschleudert und in dieser Prall- und Desagglomerationszone optimal aufgelöst und vergleichmäßigt. Durch den Spalt 32 zwischen der Ringkammer 30 und dem Gutverteiler 13 fällt das weitgehend aufgelöste und vergleichmäßigte Gut in den Sichtraum 6 zwischen Leitapparat 4 und Rotor 2. Während das Grobgut aus dem Sichtraum 6 nach unten ausfällt und über den Grobguttrichter 11 abgeführt wird, wird das Feingut vom Sichtluftstrom durch den Rotor 2 mitgenommen und verläßt den Sichter über den unterhalb des Rotors 2 angeschlossenen Kanal 12.The function of the classifier according to FIGS. 1-3 is summarized as follows:
The material to be sifted (preferably the material to be discharged from a material bed roller mill) is fed to the material distributor 13, thrown by it into the annular chamber 29 and optimally dissolved and homogenized in this impact and deagglomeration zone. Through the gap 32 between the annular chamber 30 and the material distributor 13, the largely dissolved and homogenized material falls into the viewing space 6 between the guide device 4 and the rotor 2. While the coarse material falls out of the viewing space 6 and is discharged via the coarse material funnel 11, this becomes Fine material entrained in the air flow through the rotor 2 and leaves the classifier via the channel 12 connected below the rotor 2.

Die Drehzahlen (und im Bedarfsfalle auch die Drehrichtung) von Rotor 2 und Gutverteiler 13 können unterschiedlich gewählt werden, so daß in Anpassung an das jeweilige Gut sowohl die Desagglomeration, als auch die Sichtung optimal eingestellt werden können.The speeds (and, if necessary, the direction of rotation) of rotor 2 and crop distributor 13 can be selected differently, so that both the deagglomeration and the sighting can be optimally adjusted to match the crop.

Abweichend von dem in Fig. 1 dargestellten Ausführungsbeispiel können im Bedarfsfalle mehrere Aufgabeschurren 28 (vorzugsweise gleichmäßig über den Umfang verteilt) angeordnet werden. Statt eines Förderbandes 27 mit nachgeschalteter Aufgabeschurre 28 können beispielsweise auch Schnecken zur Zuführung des Mahlgutes vorgesehen werden.Deviating from the embodiment shown in FIG. 1 If necessary, several feed chutes 28 (preferably evenly distributed over the circumference) can be arranged. Instead of a conveyor belt 27 with a downstream feed chute 28, for example, screws can also be provided for feeding the ground material.

Die Fig. 4 - 8 veranschaulichen einige Ausführungsbeispiele von Mahlanlagen mit dem erfindungsgemäßen Sichter.4-8 illustrate some exemplary embodiments of grinding plants with the classifier according to the invention.

Die Mahlanlage gemäß Fig. 4 enthält einen Aufgabebunker 33, eine Gutbett-Walzenmühle 34, ein Umlaufbecherwerk 35, einen zugleich als Desagglomerator ausgebildeten Sichter 1 (entsprechend den Fig. 1 - 3), einen Abscheider 36 sowie einen Umluftventilator 37.4 contains a feed hopper 33, a material bed roller mill 34, a circulating bucket elevator 35, a classifier 1 (corresponding to FIGS. 1-3) which is also designed as a deagglomerator, a separator 36 and a circulating air fan 37.

Das über den Grobguttrichter 11 des Sichters 1 ausgetragene Grobgut wird bei der Mahlanlage gemäß Fig. 4 über eine Rückführung 38 zum Einlaufschacht 39 der Gutbett-Walzenmühle 34 zurückgeführt. Das im Abscheider 36 aus dem Sichtluftstrom abgeschiedene Feingut bildet das Fertiggut (Leitung 40). Die Mahlanlage gemäß Fig. 4 zeigt somit das Schema einer reinen Umlaufmahlung mit einer Gutbett-Walzenmühle 34. Da die Auflösung der aus der Walzenmühle 34 ausgetragenen Schülpen im Gutverteiler des Sichters 1 erfolgt, erübrigt sich eine gesonderte Desagglomerier-Einrichtung; zugleich verkürzt sich der Förderweg.The coarse material discharged via the coarse material hopper 11 of the classifier 1 is returned in the grinding system according to FIG. 4 via a return 38 to the inlet shaft 39 of the material bed roller mill 34. The fine material separated from the classifying air stream in the separator 36 forms the finished product (line 40). 4 thus shows the diagram of a pure circular grinding with a material bed roller mill 34. Since the scraps discharged from the roller mill 34 take place in the material distributor of the classifier 1, a separate disagglomeration device is unnecessary; at the same time, the funding path is shortened.

Bei dem Ausführungsbeispiel gemäß Fig. 5 ist zusätzlich zu den bereits anhand Fig. 4 erläuterten Elementen der Mahlanlage eine vorzugsweise als Rohrmühle 41 ausgebildete Feinmühle vorgesehen, der das über den Grobguttrichter 11 des Sichters 1 ausgetragene Grobgut zugeführt wird. Der gemeinsame Austrag der Rohrmühle 41 und des Abscheiders 36 bildet das Fertiggut (Leitung 42).In the exemplary embodiment according to FIG. 5, in addition to the elements of the grinding plant already explained with reference to FIG. 4, a fine mill, preferably designed as a tube mill 41, is provided, which contains the coarse material discharged via the coarse material hopper 11 of the classifier 1 is fed. The common discharge of the tube mill 41 and the separator 36 forms the finished product (line 42).

Es sind weiterhin in Fig. 5 gestrichelt angedeutete Rückführungen 43, 44 vorgesehen, über die - alternativ oder zusätzlich - aus der Gutbett-Walzenmühle 34 ausgetragenes Gut (Rückführung 43) und/oder über den Grobguttrichter 11 des Sichters 1 ausgetragenes Gut (Rückführung 44) zum Einlaufschacht 39 der Gutbett-Walzenmühle 34 zurückgeleitet werden kann.There are also returns 43, 44 indicated by dashed lines in FIG. 5, via which - alternatively or additionally - material discharged from the material bed roller mill 34 (return 43) and / or material discharged via the coarse material hopper 11 of the classifier 1 (return 44) can be returned to the inlet shaft 39 of the material bed roller mill 34.

Fig. 5 zeigt damit eine Mahlanlage mit Vormahlung in der Gutbett-Walzenmühle 34 und Feinmahlung in der Durchlauf-Rohrmühle 41, und zwar alternativ mit Grieß- und/oder Schülpenrückführung zur Gutbett-Walzenmühle. Auch hier ergibt die im Sichter 1 erfolgende Desagglomeration der Schülpen eine wesentliche Vereinfachung der Anlage und eine deutliche Senkung der Betriebskosten.FIG. 5 thus shows a grinding system with pre-grinding in the material bed roller mill 34 and fine grinding in the continuous tube mill 41, alternatively with semolina and / or slurry return to the material bed roller mill. Here, too, the disagglomeration of the slugs in sifter 1 results in a significant simplification of the system and a significant reduction in operating costs.

Die in Fig. 6 veranschaulichte Mahlanlage enthält die gleichen Elemente wie die Anlage gemäß Fig. 5. Wie bei der Mahlanlage gemäß Fig. 4 wird das gesamte über den Grobguttrichter 11 des Sichters 1 ausgetragene Grobgut zur Gutbett-Walzenmühle 34 zurückgeführt, während das im Abscheider 36 abgeschiedene Gut noch einer Nachmahlung in der Rohrmühle 41 unterzogen wird.The grinding system illustrated in FIG. 6 contains the same elements as the system according to FIG. 5. As with the grinding system according to FIG. 4, all of the coarse material discharged via the coarse material hopper 11 of the classifier 1 is returned to the material bed roller mill 34, while that in the separator 36 separated material is still subjected to regrinding in tube mill 41.

Die Mahlanlage gemäß Fig. 7 enthält die gleichen Elemente wie die Anlagen entsprechend den Fig. 5 und 6. Zusätzlich ist ein Umlaufbecherwerk 45 vorgesehen, das den Austrag der Rohrmühle 41 zur Aufgabeschurre 28 des Sichters 1 zurückführt, so daß es gemeinsam mit dem Austragsgut der Gutbett-Walzenmühle 34 auf den Gutverteiler 13 des Sichters 1 gelangt. Das Fertiggut wird vom Abscheider 36 abgezogen (Leitung 46).7 contains the same elements as the plants according to FIGS. 5 and 6. In addition, a circulation bucket elevator 45 is provided, which returns the discharge of the tube mill 41 to the feed chute 28 of the classifier 1, so that it together with the discharge material Material bed roller mill 34 reaches the material distributor 13 of the classifier 1. The finished product is withdrawn from separator 36 (line 46).

In Übereinstimmung mit dem Ausführungsbeispiel gemäß Fig. 5 sind alternativ oder zusätzlich verwendbare Rückführungen 43 und 44 vorgesehen, über die Austragsgut der Gutbett-Walzenmühle 34 bzw. Grobgut des Sichters 1 zur Walzenmühle 34 zurückgeführt wird.5, alternatively or additionally usable returns 43 and 44 are provided, via which discharge material from the material bed roller mill 34 or coarse material from the classifier 1 is returned to the roller mill 34.

Fig. 8 zeigt schließlich eine Mahlanlage, die außer den in Fig. 5 veranschaulichten Anlagenteilen noch ein Umlaufbecherwerk 45, einen weiteren Sichter 47 und einen Abscheider 48 enthält. Der Sichter 47 ist hierbei - anders als der Sichter 1 - in üblicher Weise ausgebildet, d. h. mit einem einzigen Antriebsmotor versehen, durch den der Antrieb des Rotors und eines geeignet gestalteten Streutellers erfolgt.FIG. 8 finally shows a grinding plant which, in addition to the plant parts illustrated in FIG. 5, also contains a circulation bucket elevator 45, a further classifier 47 and a separator 48. The sifter 47 is - in contrast to the sifter 1 - designed in the usual way, i. H. provided with a single drive motor through which the rotor and a suitably designed spreading disc are driven.

Das aus der Rohrmühle 41 ausgetragene Mahlgut wird über das Umlaufbecherwerk 45 dem Sichter 47 zugeführt. Das im Sichter 47 abgeschiedene Grobgut wird (zusammen mit dem Austragsgut des Abscheiders 36) erneut der Rohrmühle 41 zugeleitet, während das aus dem Sichter 47 ausgetragene Feingut nach Abscheidung im Abscheider 48 das Fertiggut bildet. Bei der Mahlanlage gemäß Fig. 8 erfolgt somit eine Umlaufmahlung mit der Gutbett-Walzenmühle 34 (Grobumlauf) und eine Feinmahlung mit der Rohrmühle 41 (Feinumlauf).The ground material discharged from the tube mill 41 is fed to the sifter 47 via the circulating bucket elevator 45. The coarse material separated in the sifter 47 is again fed (together with the discharge material from the separator 36) to the tube mill 41, while the fine material discharged from the sifter 47 forms the finished product after separation in the separator 48. In the grinding system according to FIG. 8, there is thus a continuous grinding with the material bed roller mill 34 (coarse circulation) and a fine grinding with the tube mill 41 (fine circulation).

Fig. 9 zeigt eine Variante der Gutaufgabe auf den Gutverteiler 13, die insbesondere für größere Ausführungen geeignet ist. Die Gutzufuhr erfolgt hierbei durch die entsprechend groß dimensionierte Welle 16, über die der Gutverteiler vom Antriebsmotor 14 angetrieben wird. Das Gut gelangt damit zentral auf den Gutverteiler 13 und wird von diesem in der bereits erläuterten Weise nach außen geschleudert und in der Ringkammer 29 desagglomeriert.FIG. 9 shows a variant of the supply of goods to the distributor 13, which is particularly suitable for larger versions. The supply of goods takes place here through the correspondingly large shaft 16, via which the crop distributor is driven by the drive motor 14. The material thus reaches the material distributor 13 centrally and is thrown outwards by it in the manner already explained and is deagglomerated in the annular chamber 29.

Claims (11)

  1. Separator containing
    a) a driven rotor (2) with a vertical axis and having blades (3) arranged spaced from one another on its periphery,
    b) a rotatable material distributor (13) arranged above the rotor (2),
    c) an arrangement for delivering material to be separated onto the material distributor (13),
    d) a stationary guide unit (4) which surrounds the rotor (2) with a clearance and has adjustable guide vanes, and in which the material thrown off by the material distributor (13) enters a separating chamber (6) formed between the guide unit (4) and the rotor (2) through which passes a stream of separating air which is delivered through the guide unit and drawn off through the rotor,
    e) a channel which is connected to one end of the rotor (2) for removal of the stream of separating air which is charged with fines,
    f) a tailings hopper (11) which is arranged below the rotor (2) and the guide unit (4) for removal of the tailings,
    characterised by the combination of the following features:
    g) the material distributor (13) is driven independently of the rotor (2) by means of a separate drive arrangement, and
    h) this material distributor (13) is surrounded with a radial clearance by an annular chamber (29) which is open towards the material distributor, constitutes an impact disagglomeration zone and in which a granular mass forms on its base (30) during operation and acts as protection against wear.
  2. Separator as claimed in claim 1, characterised in that the material distributor (13) contains the following elements:
    a) a plate-shaped base plate (19),
    b) a number of guide bars (21) which are arranged on the base plate and are inclined with respect to the radial position in the direction of rotation of the material distributor,
    c) retaining elements (23, 24) to build up a cushion on material on the guide bars (21).
  3. Separator as claimed in claim 2, characterised in that the material distributor (13) has an annular cover plate (20) and an annular material inlet opening (26) is provided between this cover plate (20) and the drive shaft (16).
  4. Separator as claimed in claim 1, characterised in that the material distributor (13) is surrounded with radial spacing by an annular chamber (29) which is open towards the material distributor, represents an impact and disagglomeration zone and in which a heap of material forms which acts as protection against wear.
  5. Separator as claimed in claim 1, characterised in that the drive shaft of the material distributor (13) is constructed as a hollow shaft (16).
  6. Grinding plant containing
    a) a high-pressure grinding roll mill (34) with two rolls pressed against one another under high pressure,
    b) as well as a separator (1) for separating the material comminuted in the roll mill,
    characterised by a separator as claimed in claim 1.
  7. Grinding plant as claimed in claim 6, characterised in that a return line (38) is provided for returning the tailings discharged via the tailings hopper (11) of the separator (1) to the roll mill (34).
  8. Grinding plant as claimed in claim 6, characterised by the following features:
    a) return lines (43, 44) are also provided which can be used alternatively or additionally and by means of which the material discharged from the high-pressure grinding roll mill (34) and via the tailings hopper (11) of the separator (1) can be returned to the roll mill.
  9. Grinding plant as claimed in claim 8, characterised by a further return line by means of which the material discharged from the fine grinding mill is again delivered to the separator (1).
  10. Grinding plant as claimed in claim 7, characterised by a fine grinding mill which is preferably constructed as a tube mill (41) for regrinding material discharged from the separator (1) as fines.
  11. Grinding plant as claimed in claim 10, characterised by a further return line by means of which the material discharged from the line grinding mill (41) is delivered to a further separator (47) with an individual drive.
EP89121348A 1988-12-22 1989-11-17 Sifter Expired - Lifetime EP0374491B1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE3843338A DE3843338A1 (en) 1988-12-22 1988-12-22 SAFE
DE3843338 1988-12-22

Publications (3)

Publication Number Publication Date
EP0374491A2 EP0374491A2 (en) 1990-06-27
EP0374491A3 EP0374491A3 (en) 1991-12-11
EP0374491B1 true EP0374491B1 (en) 1994-02-16

Family

ID=6369914

Family Applications (1)

Application Number Title Priority Date Filing Date
EP89121348A Expired - Lifetime EP0374491B1 (en) 1988-12-22 1989-11-17 Sifter

Country Status (4)

Country Link
US (1) US5024754A (en)
EP (1) EP0374491B1 (en)
DE (2) DE3843338A1 (en)
ES (1) ES2050207T3 (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN104853847A (en) * 2012-10-10 2015-08-19 蒂森克虏伯工业解决方案股份公司 Grinding mill

Families Citing this family (19)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE9015363U1 (en) * 1990-11-08 1991-01-17 Christian Pfeiffer Maschinenfabrik GmbH & Co KG, 4720 Beckum Device for material dispersion
DK167054B1 (en) * 1990-11-26 1993-08-23 Smidth & Co As F L DOUBLE SEPARATOR FOR SEPARATION OF PARTICULATE MATERIAL
IT1248066B (en) * 1991-06-17 1995-01-05 Italcementi Spa DYNAMIC SEPARATOR FOR POWDERED MATERIALS, IN PARTICULAR CEMENT AND PLANT THAT INCLUDES IT
DE4306930B4 (en) * 1992-07-25 2005-11-10 Khd Humboldt Wedag Ag Plant for the comminution of regrind
DE4224704C2 (en) * 1992-07-25 2002-01-31 Kloeckner Humboldt Wedag Process and plant for crushing regrind
DE4303987A1 (en) * 1993-02-11 1994-08-18 Kloeckner Humboldt Deutz Ag Grinding process and associated grinding plant
DE4320025A1 (en) * 1993-06-17 1994-12-22 Krupp Polysius Ag Grinding plant and method for grinding and classifying brittle regrind
DE4443588A1 (en) * 1994-12-07 1996-06-13 Krupp Polysius Ag Method and plant for the joint grinding of at least two differently ground materials
JPH08281213A (en) * 1995-04-14 1996-10-29 Ishikawajima Harima Heavy Ind Co Ltd Classifier
US6193075B1 (en) 1996-09-30 2001-02-27 Colgate-Palmolive Company Air classification of animal by-products
CN1100625C (en) * 1996-10-11 2003-02-05 石川岛播磨重工业株式会社 Classifier
US6276534B1 (en) 1998-04-03 2001-08-21 Hosokawa Micron Powder Systems Classifier apparatus for particulate matter/powder classifier
US6202854B1 (en) * 1999-03-23 2001-03-20 Marsulex Environmental Technologies, Llc Air classifier for particulate material
DE10147591B4 (en) * 2001-09-27 2006-11-16 Polysius Ag grinding plant
US6739456B2 (en) 2002-06-03 2004-05-25 University Of Florida Research Foundation, Inc. Apparatus and methods for separating particles
DE102004027128A1 (en) * 2004-06-03 2005-12-22 Polysius Ag Sieve assembly, to sort granular materials into at least three fractions for a mill, has a concentric array of a static and a dynamic sieve around a common axis in a common housing
DE102007046834B4 (en) * 2007-09-29 2010-01-14 Holcim Technology Ltd. Process for the production of cements containing granulated blastfurnace
DE102013008907A1 (en) * 2013-05-25 2014-11-27 Khd Humboldt Wedag Gmbh Kreislaufmahlanlage
CN110369033B (en) * 2019-07-16 2021-08-06 江西亚香香料有限公司 A chemical raw material grinding and drying device

Family Cites Families (22)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3015392A (en) * 1959-08-14 1962-01-02 Microcyclomat Co Vertical feed centripetal classifier
DE1208984B (en) * 1964-05-21 1966-01-13 Steinmueller Gmbh L & C Device for distributing the grist at Schlaegermuehlen
DE2036891C3 (en) * 1970-07-24 1974-08-01 Hosokawa Funtaikogaku Kenkyusho, Osaka (Japan) Powder sifter
JPS51147059A (en) * 1975-06-13 1976-12-17 Nobuo Yoshimori Apparatus for classification
DE2547709A1 (en) * 1975-10-24 1977-05-05 Polysius Ag VERTICAL-AXIS RECIRCULATION WIND SENSOR
DE3038625A1 (en) * 1980-10-13 1982-05-19 Fa. Christian Pfeiffer, 4720 Beckum ROTARY AIR CENTRIFUGAL SIFTER
DE3044063A1 (en) * 1980-11-22 1982-07-15 Krupp Polysius Ag, 4720 Beckum Wind sifter for powdery material - has rotor, supply channels and suction chambers, suction housings and collecting funnel
US4418871A (en) * 1981-07-15 1983-12-06 P.V. Machining, Inc. Method and apparatus for reducing and classifying mineral crystalline and brittle noncrystalline material
DE3302176A1 (en) * 1983-01-24 1984-07-26 Klöckner-Humboldt-Deutz AG, 5000 Köln METHOD AND SYSTEM FOR CONTINUOUS PRESSURE REDUCTION OF SPROEDEN GROUND MATERIAL
DE3426294A1 (en) * 1984-07-17 1986-01-23 Klöckner-Humboldt-Deutz AG, 5000 Köln Cyclone recirculating-air screen for screening material with varying particle size, in particular cement
GB8518536D0 (en) * 1985-07-23 1985-08-29 Smidth & Co As F L Separator
DE3539512A1 (en) * 1985-11-07 1987-05-14 Krupp Polysius Ag SAFE
DE8606061U1 (en) * 1986-03-05 1986-04-17 Krupp Polysius Ag, 4720 Beckum Device for the finely distributed scattering of material in the viewing area of an air classifier
DE3609229A1 (en) * 1986-03-19 1987-09-24 Krupp Polysius Ag METHOD AND SYSTEM FOR CRUSHING SPROEDEM GROUND MATERIAL
DE3621221A1 (en) * 1986-06-25 1988-01-14 Pfeiffer Fa Christian METHOD FOR WINDPROOFING AND WINIFIFIER
DE3622413C2 (en) * 1986-07-03 1995-08-03 Krupp Polysius Ag Classifier
DE3644341A1 (en) * 1986-12-23 1988-07-07 Krupp Polysius Ag METHOD AND SYSTEM FOR THE TWO-STAGE CRUSHING OF SPROEDEM GROUND MATERIAL
DE3644342A1 (en) * 1986-12-23 1988-07-07 Krupp Polysius Ag METHOD AND SYSTEM FOR THE TWO-STAGE CRUSHING OF SPROEDEM GROUND MATERIAL
FR2610217B1 (en) * 1987-01-30 1991-08-16 Alsthom ROTARY CRUSHER WITH SELF-PROTECTED SPRAY BLADES
DE3711926A1 (en) * 1987-04-08 1988-10-27 Kloeckner Humboldt Deutz Ag Device for comminuting and grinding brittle material to be ground, such as cement clinker, ore, coal or the like
DE3822729A1 (en) * 1988-07-05 1990-01-11 Krupp Polysius Ag PLANT FOR SHREDDING SPROEDEM GROUND
DE3823380C2 (en) * 1988-07-09 1994-09-08 Kloeckner Humboldt Deutz Ag Sifter for sifting granular, especially agglomerated goods

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN104853847A (en) * 2012-10-10 2015-08-19 蒂森克虏伯工业解决方案股份公司 Grinding mill
CN104853847B (en) * 2012-10-10 2017-09-08 蒂森克虏伯工业解决方案股份公司 grinder

Also Published As

Publication number Publication date
EP0374491A3 (en) 1991-12-11
EP0374491A2 (en) 1990-06-27
US5024754A (en) 1991-06-18
ES2050207T3 (en) 1994-05-16
DE58906996D1 (en) 1994-03-24
DE3843338A1 (en) 1990-06-28

Similar Documents

Publication Publication Date Title
EP0374491B1 (en) Sifter
EP0325770B1 (en) Grinding method and arrangement
EP2106301B1 (en) Classifying device for classifying granular material and circulating grinding plant incorporating such a classifying device
EP1919624B1 (en) Drying mill and method of drying ground material
DE4223762A1 (en) Bulk grain classifier with reduced wear - comprising pre-classifier chamber having inlet for grains and outlet for coarse grains
EP0460490B1 (en) Air classifier
EP0250921B1 (en) Air classifier
DE8425837U1 (en) Roller mill
EP0292739B1 (en) Method and arrangement for breaking up grindable material
DE69305413T2 (en) Pulverizer
EP0053755B1 (en) Method and arrangement for impact crushing
DE3342765A1 (en) CRUSHING DEVICE, IN PARTICULAR FOR HARD GRAINED SHELLS
EP1948360B1 (en) Roller mill
EP0350616B1 (en) Pneumatic classifier for granular or agglomerated material
DE69103637T2 (en) DOUBLE SEPARATOR FOR SIGHTING PARTICLE MATERIAL.
EP0377826B1 (en) Sifter
EP0237641B1 (en) Comminuting plant for brittle material
DE1291604B (en) Classifier mill
DE1136189B (en) Mill for fine grinding of solid, dry material
EP0978317B1 (en) Air-swept crushing machine with rotary impact rotor
EP0964748B1 (en) Method and device for fragmenting bulk materials
DE1288888B (en) Device for grinding lumpy goods
EP1040872A1 (en) Tube mill
DE4431534B4 (en) Machine for acting on comminuted and classifiable raw material, as well as method for operating the machine
DE3046173C2 (en)

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: A2

Designated state(s): DE ES FR GB IT

PUAL Search report despatched

Free format text: ORIGINAL CODE: 0009013

AK Designated contracting states

Kind code of ref document: A3

Designated state(s): DE ES FR GB IT

17P Request for examination filed

Effective date: 19920309

17Q First examination report despatched

Effective date: 19930608

GRAA (expected) grant

Free format text: ORIGINAL CODE: 0009210

AK Designated contracting states

Kind code of ref document: B1

Designated state(s): DE ES FR GB IT

REF Corresponds to:

Ref document number: 58906996

Country of ref document: DE

Date of ref document: 19940324

GBT Gb: translation of ep patent filed (gb section 77(6)(a)/1977)

Effective date: 19940330

ITF It: translation for a ep patent filed
REG Reference to a national code

Ref country code: ES

Ref legal event code: FG2A

Ref document number: 2050207

Country of ref document: ES

Kind code of ref document: T3

ET Fr: translation filed
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
PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: FR

Payment date: 19981008

Year of fee payment: 10

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

Ref country code: GB

Payment date: 19981020

Year of fee payment: 10

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

Ref country code: ES

Payment date: 19981111

Year of fee payment: 10

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

Ref country code: DE

Payment date: 19981201

Year of fee payment: 10

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

Ref country code: GB

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

Effective date: 19991117

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

Ref country code: ES

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

Effective date: 19991118

GBPC Gb: european patent ceased through non-payment of renewal fee

Effective date: 19991117

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: 20000731

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: 20000901

REG Reference to a national code

Ref country code: FR

Ref legal event code: ST

REG Reference to a national code

Ref country code: ES

Ref legal event code: FD2A

Effective date: 20001214

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

Ref country code: IT

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES;WARNING: LAPSES OF ITALIAN PATENTS WITH EFFECTIVE DATE BEFORE 2007 MAY HAVE OCCURRED AT ANY TIME BEFORE 2007. THE CORRECT EFFECTIVE DATE MAY BE DIFFERENT FROM THE ONE RECORDED.

Effective date: 20051117