EP0649349B1 - Process and device for sifting a stream of bulk materials - Google Patents

Process and device for sifting a stream of bulk materials Download PDF

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Publication number
EP0649349B1
EP0649349B1 EP94916946A EP94916946A EP0649349B1 EP 0649349 B1 EP0649349 B1 EP 0649349B1 EP 94916946 A EP94916946 A EP 94916946A EP 94916946 A EP94916946 A EP 94916946A EP 0649349 B1 EP0649349 B1 EP 0649349B1
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EP
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Prior art keywords
screen
sieve
pct
stream
screen surface
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Expired - Lifetime
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EP94916946A
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German (de)
French (fr)
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EP0649349A1 (en
Inventor
Adolf Buchfink
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Claudius Peters AG
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BMH Claudius Peters AG
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    • 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
    • B07B4/00—Separating solids from solids by subjecting their mixture to gas currents
    • B07B4/08—Separating solids from solids by subjecting their mixture to gas currents while the mixtures are supported by sieves, screens, or like mechanical elements

Definitions

  • the invention relates to a screening device, in which is a bulk material flow for the most part a screen area should flow through, while only foreign objects such as metal parts or lumps of material are retained. It's up to her based on the task of increasing the required screen area reduce.
  • the solution according to the invention is that the screen surface a ventilation floor in the conveying path of the bulk material flow is connected upstream with approximately the same conveying direction. Thereby the bulk material stream reaches the screen surface as a fluidized bed.
  • the bulk material is in the state of the fluidized bed (at least fine-grained portion) flowable. This makes it easier with the sieving process associated movement processes, namely to the passage of the sieve underflow through the sieve openings and secondly, the separation within the good bed.
  • the Sieving performance per unit area of the sieve surface is thereby enlarged; the required expansion of the screen area is decreased. This also reduces the height requirement.
  • the fluidized bed conveying surface can be a act conventional pneumatic conveyor trough through which porous soil gas into the material bed lying on the conveying surface is initiated, making it flowable is transferred.
  • the conveying movement can by appropriate Slope of the conveying surface must be caused.
  • the fluidized bed cannot be found above the sieve surface sustained in the long term because that is the vortex state justifying gas separating the particles from each other easily can flow up and down. It is therefore advisable that the screen surface in the conveying direction in relation to the conveying speed is so short that the fluidized bed condition of the Sieve overflow remains. More specifically, that should be Bulk goods bed at the end of the sieve conveyor in one condition in which it is still so fluid that it is from the Screen surface can drain off.
  • the other operating conditions to take into account especially slopes and an intended vibration of the screen surface. These influences have a beneficial effect on production and fluidity the estate bed. If there is a slope or vibration, therefore the vortex state at the end of the sieve section does not need to be so pronounced that the good is due to this alone Vortex could still flow away.
  • the length of the screen section is, however there is not a refreshment of the vortex state by gas supply done, set limits. It may therefore be that the Sieve section is shorter than it is to sieve the whole Fine fraction would be required. In this case you can go to the invention several fluidized bed conveying surfaces and sieve surfaces arrange one after the other.
  • the entire screening device provides then as a result of several sections of pneumatic Conveyor troughs alternating with preferably on the same level intermediate sieve sections, the sieve sections are each kept so short that further funding not stopping on it during the pneumatic conveyor trough sections are so long that the required one Fluid bed state can be restored.
  • the flow of the flowable material through the sieve surfaces to accelerate a device for generating a differential pressure promoting the passage of the screen may be provided.
  • the application of a differential pressure on a screen surface is on known (GB-A 671 232).
  • FIG. 1 there is a bulk goods container at the outlet 1 connected to a pneumatic conveyor trough 2.
  • a pneumatic conveyor trough 2 It is a well-known funding element, which as The bottom of a closed conveyor channel is an air-permeable one Has plate, which is from an air supply duct located below is pressurized with compressed air after the Passing the floor penetrates into the bed of material lying on it and placed it in a fluid state as a fluidized bed. Due to the slight gradient, it starts to move.
  • the sieve device 4 To the pneumatic conveyor trough 2 is an elastic Compensator 3, the sieve device generally designated 4 connected, whose underflow by a pneumatic conveyor trough 5 is continued via an elastic compensator 6 is connected to the screening device. The overflow is discharged laterally at 7.
  • the screening device 4 is on Supports 8 arranged by means of vibrating bearings 9 and with unbalance motors 10 equipped, which they according to known principles in Move vibration.
  • FIG. 2 The structure of the screening device is shown in FIG. 2 one recognizes an upper sieve space 11, the bottom of which is flush the compensator 3 to the ventilation floor of the conveyor trough 2 connects. Underneath is a sieve sub-space 12 which as a pneumatic conveyor trough with a ventilation base 13 and a ventilation space 14 for the removal of the screen underflow is executed. At the pneumatic conveyor trough of this sieve sub-area is the pneumatic conveyor trough 5 via the compensator 6 connected in alignment.
  • Ventilation floors 17 which compressed air from a line 18 with suitable actuators forth Ventilation rooms 19 can be supplied.
  • These ventilation floors as well the ventilation floor of the conveyor trough 2 were with the top more general term fluid bed conveying surface.
  • a chute 20 connects to the last screen surface 16, which removes the screen overflow and with flaps 21 is provided to the inflow and outflow of air if necessary prevent.
  • Pendulum flap 22 may be provided.
  • the material bed emerges from the pneumatic conveyor trough 2 in Condition of the fluidized bed in the sieve. Because of their fluidized state, the gradient and the vibration it runs largely over the first screen surface 16. This screen area is shorter than it is for completion the sieving process would be required. About the following Aeration path becomes the fluidization state of the Fluidized bed refreshed again so that it is fluidized Condition reached and overflows the following screen section, and immediately. The screen overflow is through chute 20 at the end discharged from the screening device.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Combined Means For Separation Of Solids (AREA)
  • Processes Of Treating Macromolecular Substances (AREA)
  • Excavating Of Shafts Or Tunnels (AREA)
  • Automatic Analysis And Handling Materials Therefor (AREA)
  • Devices And Processes Conducted In The Presence Of Fluids And Solid Particles (AREA)

Abstract

PCT No. PCT/EP94/01504 Sec. 371 Date Jan. 6, 1995 Sec. 102(e) Date Jan. 6, 1995 PCT Filed May 10, 1994 PCT Pub. No. WO94/26428 PCT Pub. Date Nov. 24, 1994The screening of a stream of bulk material is accelerated so that this takes place in the state of the fluidized bed. The screening apparatus can be made correspondingly smaller. So that the fluidized-bed state persists over the screen surface, the latter is made short and, if necessary, a plurality of screen surfaces with interposed aerating stages are connected in succession.

Description

Beim Sieben eines Schüttgutstroms ist es üblich, den Schüttgutstrom von oben auf die Siebfläche zu geben, auf der er sich schichtförmig verteilt. Durch Vibration und/oder Gefälle kann die Schicht in Bewegung gehalten und der Siebüberlauf abgefördert werden. Auch wenn die Schicht durch Vibration in Bewegung gehalten wird, befindet sie sich in einem vergleichsweise dichten Schüttzustand.When sieving a bulk material flow, it is common for the bulk material flow from above onto the screen surface on which it is located distributed in layers. Due to vibration and / or gradient the layer is kept in motion and the screen overflow is removed will. Even if the layer is moving due to vibration is held, it is in a comparatively dense bulk.

Aus der US-A 2 200 472 ist eine Siebvorrichtung zum Befreien eines Gummigranulats von Staub und groben Fremdkörpern bekannt, in welcher das Gut über eine geneigt angeordnete Siebfläche geleitet wird, die von unten nach oben von einem Gasstrom durchquert wird, der Staub und spezifisch leichte Fremdkörper stärker anhebt als das Granulat, welches weniger stark angehoben wird und nach dem Durchqueren des Schüttgutstroms auf das Sieb zurückfällt. Im Bereich des Luftstrahls selbst kann das Granulat nicht gegen dessen Wirkung durch das Sieb hindurchfallen. Ob es sich anschließend an den Luftstrahlbereich in einem Zustand befindet, der die Siebwirkung begünstigt, wird in der Schrift nicht offenbart.From US-A 2 200 472 there is a screening device for liberating a rubber granulate of dust and coarse foreign bodies, in which the goods are arranged at an incline Screen area is directed from bottom to top by a Gas flow is traversed, the dust and specifically light Foreign body lifts more than the granulate, which is less is raised sharply and after crossing the bulk material flow falls back on the sieve. In the area of the air jet even the granules cannot counteract its action by the Fall through the sieve. Whether it is subsequent to the air jet area is in a state that has the sieving effect favored, is not disclosed in the Scriptures.

Auch aus der DE-A 22 19 179 ist es bekannt, aus einem zu siebenden Schüttgutstrom leichte Anteile durch einen von unten nach oben hindurchgehenden Blasstrom auszuscheiden. Die Siebbarkeit der verbleibenden Teilchen wird dadurch nicht verändert, da diese beim Durchqueren des Luftstroms die Berührung mit der Förderfläche nicht verlieren.It is also known from DE-A 22 19 179 to use one sifting bulk material flow through a light fraction from below to blow out blowing current going upwards. The This does not reduce the sievability of the remaining particles changed, since this when crossing the air flow the Do not lose contact with the conveying surface.

Die Erfindung bezieht sich auf eine Siebvorrichtung, in welcher ein Schüttgutstrom zum größten Teil eine Siebfläche durchfließen soll, während lediglich Fremdkörper wie Metallteile oder Materialklumpen zurückgehalten werden. Es liegt ihr die Aufgabe zugrunde, die dafür benötigte Siebfläche zu verringern.The invention relates to a screening device, in which is a bulk material flow for the most part a screen area should flow through, while only foreign objects such as metal parts or lumps of material are retained. It's up to her based on the task of increasing the required screen area reduce.

Die erfindungsgemäße Lösung besteht darin, daß der Siebfläche ein Belüftungsboden im Förderweg des Schüttgutstroms mit etwa gleicher Förderrichtung vorgeschaltet ist. Dadurch gelangt der Schüttgutstrom als Wirbelbett auf die Siebfläche. Im Zustand des Wirbelbetts ist das Schüttgut (zumindest sein feinkörnigerer Anteil) fließfähig. Dies erleichtert die mit dem Siebvorgang verbundenen Bewegungsvorgänge, nämlich zum einen den Durchgang des Siebunterlaufs durch die Sieböffnungen und zum anderen die Separation innerhalb des Gutbetts. Die Siebleistung je Flächeneinheit der Siebfläche wird dadurch vergrößert; die benötigte Ausdehnung der Siebfläche wird verringert. Damit verringert sich gleichzeitig der Höhenbedarf. Bei der Wirbelbettförderfläche kann es sich um eine herkömmliche pneumatische Förderrinne handeln, durch deren porösen Boden Gas in das auf der Förderfläche liegende Gutbett eingeleitet wird, wodurch dieses in fließfähigen Zustand versetzt wird. Die Förderbewegung kann durch entsprechendes Gefälle der Förderfläche veranlaßt sein.The solution according to the invention is that the screen surface a ventilation floor in the conveying path of the bulk material flow is connected upstream with approximately the same conveying direction. Thereby the bulk material stream reaches the screen surface as a fluidized bed. The bulk material is in the state of the fluidized bed (at least fine-grained portion) flowable. This makes it easier with the sieving process associated movement processes, namely to the passage of the sieve underflow through the sieve openings and secondly, the separation within the good bed. The Sieving performance per unit area of the sieve surface is thereby enlarged; the required expansion of the screen area is decreased. This also reduces the height requirement. The fluidized bed conveying surface can be a act conventional pneumatic conveyor trough through which porous soil gas into the material bed lying on the conveying surface is initiated, making it flowable is transferred. The conveying movement can by appropriate Slope of the conveying surface must be caused.

Der Wirbelbettzustand läßt sich oberhalb der Siebfläche nicht langfristig aufrechterhalten, weil das den Wirbelzustand begründende, die Partikeln voneinander trennende Gas leicht nach oben und unten abfließen kann. Es ist deshalb zweckmäßig, daß die Siebfläche in Förderrichtung im Verhältnis zur Fördergeschwindigkeit so kurz ist, daß der Wirbelbettzustand des Siebüberlaufs erhalten bleibt. Genauer gesagt, soll sich das Schüttgutbett am Ende der Siebförderstrecke in einem Zustand befinden, in welchem es noch so fließfähig ist, daß es von der Siebfläche abfließen kann. Dabei sind die übrigen Betriebsbedingungen mit in Betracht zu ziehen, insbesondere Gefälle und eine etwa vorgesehene Vibration der Siebfläche. Diese Einflüsse wirken begünstigend auf die Förderung und die Fließfähigkeit des Gutbetts. Wenn Gefälle oder Vibration hinzutreten, braucht daher der Wirbelzustand am Ende der Siebstrecke nicht so ausgeprägt zu sein, daß das Gut alleine aufgrund dieses Wirbelzustands noch abfließen könnte.The fluidized bed cannot be found above the sieve surface sustained in the long term because that is the vortex state justifying gas separating the particles from each other easily can flow up and down. It is therefore advisable that the screen surface in the conveying direction in relation to the conveying speed is so short that the fluidized bed condition of the Sieve overflow remains. More specifically, that should be Bulk goods bed at the end of the sieve conveyor in one condition in which it is still so fluid that it is from the Screen surface can drain off. The other operating conditions to take into account, especially slopes and an intended vibration of the screen surface. These influences have a beneficial effect on production and fluidity the estate bed. If there is a slope or vibration, therefore the vortex state at the end of the sieve section does not need to be so pronounced that the good is due to this alone Vortex could still flow away.

Aufgrund dieser Umstände sind der Länge der Siebstrecke, wenn dort nicht eine Auffrischung des Wirbelzustands durch Gaszufuhr erfolgt, Grenzen gesetzt. Es kann daher sein, daß die Siebstrecke kürzer ist als es zum Absieben des gesamten Feinanteils erforderlich wäre. In diesem Fall kann man nach der Erfindung mehrere Wirbelbettförderflächen und Siebflächen hintereinander anordnen. Die gesamte Siebvorrichtung stellt sich dann als eine Folge mehrerer Abschnitte von pneumatischen Förderrinnen im Wechsel mit vorzugsweise in derselben Ebene zwischengeschalteten Siebabschnitten dar, wobei die Siebabschnitte jeweils so kurz gehalten sind, daß die Weiterförderung darauf nicht stockt, während die pneumatischen Förderrinnenabschnitte so lang sind, daß darauf der erforderliche Wirbelschichtzustand wieder hergestellt werden kann.Because of these circumstances, the length of the screen section is, however there is not a refreshment of the vortex state by gas supply done, set limits. It may therefore be that the Sieve section is shorter than it is to sieve the whole Fine fraction would be required. In this case you can go to the invention several fluidized bed conveying surfaces and sieve surfaces arrange one after the other. The entire screening device provides then as a result of several sections of pneumatic Conveyor troughs alternating with preferably on the same level intermediate sieve sections, the sieve sections are each kept so short that further funding not stopping on it during the pneumatic conveyor trough sections are so long that the required one Fluid bed state can be restored.

Um den Durchfluß des fließfähigen Guts durch die Siebflächen zu beschleunigen, kann eine Einrichtung zur Erzeugung eines den Siebdurchgang fördernden Differenzdrucks vorgesehen sein. Die Anwendung eines Differenzdrucks an einer Siebfläche ist an sich bekannt (GB-A 671 232).The flow of the flowable material through the sieve surfaces to accelerate a device for generating a differential pressure promoting the passage of the screen may be provided. The application of a differential pressure on a screen surface is on known (GB-A 671 232).

Die Erfindung wird im folgenden näher unter Bezugnahme auf die Zeichnung erläutert, die ein vorteilhaftes Ausführungsbeispiel schematisch veranschaulicht. Darin zeigen:

Fig. 1
die Seitenansicht eines Teils einer Anlage mit der erfindungsgemäßen Siebvorrichtung,
Fig. 2
einen Längsschnitt durch die Siebvorrichtung,
Fig. 3
eine Draufsicht auf die Siebvorrichtung und
Fig. 4
einen Querschnitt gemäß Linie IV-IV der Fig. 2.
The invention is explained in more detail below with reference to the drawing, which schematically illustrates an advantageous embodiment. In it show:
Fig. 1
the side view of part of a plant with the screening device according to the invention,
Fig. 2
a longitudinal section through the screening device,
Fig. 3
a plan view of the screening device and
Fig. 4
3 shows a cross section along line IV-IV of FIG. 2.

In dem Beispiel gemäß Fig. 1 ist an den Auslauf eines Schütgutbehälters 1 eine pneumatische Förderrinne 2 angeschlossen. Dabei handelt es sich um ein bekanntes Förderelement, der als Boden eines geschlossenen Förderkanals eine luftdurchlässige Platte aufweist, die von einem darunter befindlichen Luftzuführungskanal mit Druckluft beaufschlagt ist, die nach dem Passieren des Bodens in das darauf liegende Gutbett eindringt und es als Wirbelschicht in fließfähigen Zustand versetzt. Aufgrund leichten Gefälles gelangt es in Förderbewegung.In the example according to FIG. 1 there is a bulk goods container at the outlet 1 connected to a pneumatic conveyor trough 2. It is a well-known funding element, which as The bottom of a closed conveyor channel is an air-permeable one Has plate, which is from an air supply duct located below is pressurized with compressed air after the Passing the floor penetrates into the bed of material lying on it and placed it in a fluid state as a fluidized bed. Due to the slight gradient, it starts to move.

An die pneumatische Förderrinne 2 ist über einen elastischen Kompensator 3 die allgemein mit 4 bezeichnete Siebeinrichtung angeschlossen, deren Unterlauf von einer pneumatischen Förderrinne 5 weitergeführt wird, die über einen elastischen Kompensator 6 an die Siebeinrichtung angeschlossen ist. Der Überlauf wird seitlich bei 7 abgeführt. Die Siebeinrichtung 4 ist auf Stützen 8 mittels Schwinglagern 9 angeordnet und mit Unwuchtmotoren 10 ausgerüstet, die sie nach bekannten Grundsätzen in Vibration versetzen.To the pneumatic conveyor trough 2 is an elastic Compensator 3, the sieve device generally designated 4 connected, whose underflow by a pneumatic conveyor trough 5 is continued via an elastic compensator 6 is connected to the screening device. The overflow is discharged laterally at 7. The screening device 4 is on Supports 8 arranged by means of vibrating bearings 9 and with unbalance motors 10 equipped, which they according to known principles in Move vibration.

Der Aufbau der Siebeinrichtung ergibt sich aus Fig. 2. Darin erkennt man einen Sieboberraum 11, dessen Boden fluchtend über den Kompensator 3 an den Belüftungsboden der Förderrinne 2 anschließt. Darunter befindet sich ein Siebunterraum 12, der als pneumatische Förderrinne mit einem Belüftungsboden 13 und einem Belüftungsraum 14 zur Abförderung des Siebunterlaufs ausgeführt ist. An die pneumatische Förderrinne dieses Siebunterraums ist die pneumatische Förderrinne 5 über den Kompensator 6 fluchtend angeschlossen. The structure of the screening device is shown in FIG. 2 one recognizes an upper sieve space 11, the bottom of which is flush the compensator 3 to the ventilation floor of the conveyor trough 2 connects. Underneath is a sieve sub-space 12 which as a pneumatic conveyor trough with a ventilation base 13 and a ventilation space 14 for the removal of the screen underflow is executed. At the pneumatic conveyor trough of this sieve sub-area is the pneumatic conveyor trough 5 via the compensator 6 connected in alignment.

Zwischen dem Oberraum 11 und dem Unterraum 12 befindet sich der Boden 15, der sich - wie aus der Draufsicht Fig. 3 erkennbar - aus vier Siebflächen 16 und dazwischen fluchtend angeordneten Belüftungsböden 17 zusammensetzt, denen Druckluft von einer Leitung 18 mit geeigneten Stellorganen her über die Belüftungsräume 19 zuführbar ist. Diese Belüftungsböden sowie der Belüftungsboden der Förderrinne 2 wurden oben mit dem allgemeineren Ausdruck Wirbelbettförderfläche bezeichnet.Is between the upper room 11 and the lower room 12 the bottom 15, which - as can be seen from the plan view in FIG. 3 - Made of four screen surfaces 16 and arranged in-line between them Ventilation floors 17, which compressed air from a line 18 with suitable actuators forth Ventilation rooms 19 can be supplied. These ventilation floors as well the ventilation floor of the conveyor trough 2 were with the top more general term fluid bed conveying surface.

An die letzte Siebfläche 16 schließt sich eine Schurre 20 an, die den Siebüberlauf abführt und mit verschlußklappen 21 versehen ist, um nötigenfalls den Zu- und Abstrom von Luft zu verhindern.A chute 20 connects to the last screen surface 16, which removes the screen overflow and with flaps 21 is provided to the inflow and outflow of air if necessary prevent.

Damit das Gut über der Siebeinrichtung nicht durchschießt, kann über dem Anfang des Bodens 15 der Siebeinrichtung eine Pendelklappe 22 vorgesehen sein.So that the material does not shoot through the sieve, can over the beginning of the bottom 15 of the screening device Pendulum flap 22 may be provided.

Das Gutbett tritt von der pneumatischen Förderrinne 2 im Zustand der Wirbelschicht in die Siebeinrichtung ein. Aufgrund ihres fluidisierten Zustands, des Gefälles und der Vibration läuft sie großenteils über die erste Siebfläche 16 hinweg. Diese Siebfläche ist kürzer bemessen, als es für die Vollendung des Siebvorgangs erforderlich wäre. Über der folgenden Belüftungsstrecke wird der Fluidisierungszustand der Wirbelschicht wieder aufgefrischt, so daß sie im fluidisierten Zustand die folgende Siebstrecke erreicht und überläuft, und so fort. Der Siebüberlauf wird durch die Schurre 20 am Ende der Siebeinrichtung abgeführt.The material bed emerges from the pneumatic conveyor trough 2 in Condition of the fluidized bed in the sieve. Because of their fluidized state, the gradient and the vibration it runs largely over the first screen surface 16. This screen area is shorter than it is for completion the sieving process would be required. About the following Aeration path becomes the fluidization state of the Fluidized bed refreshed again so that it is fluidized Condition reached and overflows the following screen section, and immediately. The screen overflow is through chute 20 at the end discharged from the screening device.

Wenn lediglich Grobgut aus dem Förderstrom ausgesiebt werden soll, haben sämtliche Siebflächen 16 gleiche Öffnungsgröße. Es versteht sich, daß man die Einrichtung auch so abwandeln kann, daß sie zum Klassieren benutzt werden kann.If only coarse material is sifted out of the flow should, all sieve surfaces 16 have the same opening size. It it goes without saying that you can also modify the device that it can be used for classifying.

Claims (5)

  1. Apparatus for screening a stream of bulk material, which forms a conveying path over and beyond a screen surface, characterized in that at least one aeration bottom and at least one screen surface (16) are arranged in the conveying path in succession with the same conveying direction.
  2. Apparatus according to Claim 1, characterized in that a plurality of aeration bottoms (17) and screen surfaces (16) are arranged in succession.
  3. Apparatus according to Claim 1 or 2, characterized in that the screen surface or screen surfaces (16) is or are connected to a vibrating drive (10).
  4. Apparatus according to Claims 2 and 3, characterized in that the aeration bottom / aeration bottoms (17) and screen surface or screen surfaces (16) are combined to form a unit which can be jointly vibrated.
  5. Apparatus according to one of Claims 1 to 4, characterized by a device for generating a differential pressure conducive to the screen passage.
EP94916946A 1993-05-10 1994-05-10 Process and device for sifting a stream of bulk materials Expired - Lifetime EP0649349B1 (en)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
DE9307072U 1993-05-10
DE9307072U DE9307072U1 (en) 1993-05-10 1993-05-10 Device for screening a bulk material flow
PCT/EP1994/001504 WO1994026428A1 (en) 1993-05-10 1994-05-10 Process and device for sifting a stream of bulk materials

Publications (2)

Publication Number Publication Date
EP0649349A1 EP0649349A1 (en) 1995-04-26
EP0649349B1 true EP0649349B1 (en) 1998-04-22

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EP94916946A Expired - Lifetime EP0649349B1 (en) 1993-05-10 1994-05-10 Process and device for sifting a stream of bulk materials

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US (1) US5586660A (en)
EP (1) EP0649349B1 (en)
JP (1) JPH07508932A (en)
AT (1) ATE165258T1 (en)
DE (2) DE9307072U1 (en)
ES (1) ES2117274T3 (en)
WO (1) WO1994026428A1 (en)

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Publication number Priority date Publication date Assignee Title
EP0855941B1 (en) * 1995-10-19 2000-01-19 OCRIM S.p.A. A device and apparatus for classification and separation of particles in cereal milling process
US20030230541A1 (en) * 2002-06-12 2003-12-18 Derrick Mitchell J. Vibratory screening machine with suction and pressure and method for screening a slurry
US20050133465A1 (en) * 2002-06-12 2005-06-23 Derrick Corporation Vibratory screen assembly and method of manufacture
US20050082236A1 (en) * 2002-06-12 2005-04-21 Derrick Corporation Vibratory screening machine with suction and method for screening a slurry
DE102008038645B4 (en) 2008-08-12 2016-06-09 Zeppelin Silos & Systems Gmbh Coarse material separator for separating coarse material from a bulk material

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* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2200472A (en) * 1938-06-29 1940-05-14 Schering Corp Granular material separating machine
GB671232A (en) * 1949-07-05 1952-04-30 Joanny Myard Dust collecting plant
FR2087091A5 (en) * 1970-05-05 1971-12-31 Sosson Guy

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Publication number Publication date
DE59405776D1 (en) 1998-05-28
DE9307072U1 (en) 1994-09-22
EP0649349A1 (en) 1995-04-26
WO1994026428A1 (en) 1994-11-24
JPH07508932A (en) 1995-10-05
ES2117274T3 (en) 1998-08-01
US5586660A (en) 1996-12-24
ATE165258T1 (en) 1998-05-15

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