EP1786573A1 - Apparatus for classifying charge material - Google Patents

Apparatus for classifying charge material

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Publication number
EP1786573A1
EP1786573A1 EP06791672A EP06791672A EP1786573A1 EP 1786573 A1 EP1786573 A1 EP 1786573A1 EP 06791672 A EP06791672 A EP 06791672A EP 06791672 A EP06791672 A EP 06791672A EP 1786573 A1 EP1786573 A1 EP 1786573A1
Authority
EP
European Patent Office
Prior art keywords
ventilation
width
static
mbar
floor
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.)
Granted
Application number
EP06791672A
Other languages
German (de)
French (fr)
Other versions
EP1786573B1 (en
Inventor
Ludwig KÖNNING
Egbert Burchard
Olaf Hagemeier
Franz-Josef Zurhove
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
ThyssenKrupp Industrial Solutions AG
Original Assignee
Polysius AG
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Classifications

    • 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
    • B07B9/00—Combinations of apparatus for screening or sifting or for separating solids from solids using gas currents; General arrangement of plant, e.g. flow sheets
    • B07B9/02—Combinations of similar or different apparatus for separating solids from solids using gas currents
    • 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 device for sifting feedstock with a static sifter having an obliquely oriented to the vertical, traversed by classifying gas ventilation base and a downstream dynamic classifier.
  • a sifter for sifting granular material which has a rod basket classifier and an upstream, shaft-shaped cascade classifier.
  • This cascade classifier has two inclined to the vertical, opposite and between them a caution zone forming Schachtbegrenzungspar, which are permeable to the reformulation.
  • the shaft boundary walls are formed by inclined, louvre-like baffles, which are traversed by view air across.
  • the cascade classifier is operated in circulation operation with a good bed roller mill, the baffles for
  • Deagglomerate i. serve to unlock the scabs formed in the machine bed roll mill.
  • the feed material is fed from above the cascade classifier and falls over the staircase-like baffles down and is thereby deagglomerated and sighted.
  • the fines, along with the classifying air, are fed to the rod cage sifter while the coarse components are led down.
  • the dimensioning of the feed to the separator takes place on the basis of the Gutströme to be handled and provides compact narrow mass flows compared to the classifier.
  • the requirements for a high visual efficiency demand on the one hand the limitation of the feed quantity per classifier width and on the other hand a sufficient number of - from material flow direction - sequentially switched sight levels of the cascade.
  • Another important factor influencing the visual efficiency is the uniformity of the width distribution of the visible material and the classifying air. With wider classifiers, this uniformity is more difficult to realize, which is why the number of vision stages increases with size. With classifiers therefore, the width / height ratio is about 0.15 for small feed quantities and increases to about 0.35 for larger quantities.
  • a sifting device for sifting granular material for large throughput capacities, comprising a static cascade classifier with at least one obliquely arranged viewing zone from the shaft-shaped viewing housing and an angle diverging from the vertical viewing zone and a dynamic rod basket sifter.
  • a special feature is that the sortgasseintrittsgephaseuse the viewing device viewed in plan view has a flow branching on two strands in the manner of a bifurcated tube, wherein in both bifurcated housing branch branches a cantilevered rod basket is arranged.
  • the mirror image opposite arranged front Stabkorb- discharge ends are to the outlet of
  • Fines laden sight gas flow over another housing part merged to form a common trigger housing According to a first variant, a static cascade classifier is arranged in each of the two branch pipe branch branches. In a second variant, a common cascade classifier is provided before the branch.
  • the invention is therefore based on the object to significantly reduce the height of the device for sifting with a static and dynamic sifter and to improve the visual efficiency in viewers with different throughputs. Erf ⁇ ndungshunt this object is achieved by the features of claim 1.
  • the inventive device for sifting feed essentially consists of a static sifter which has a ventilation base which is oriented obliquely to the vertical and through which viewing gas flows
  • Outlet opening for the coarse material a downstream dynamic classifier, which comprises at least one rotor and an outlet opening for the laden with fines sight gas.
  • the ventilation floor has a ratio of width to vertical height of at least 0.45, preferably of at least 0.6.
  • the surface of the ventilation floor is flat and provided with ventilation openings, in particular ventilation slots.
  • the ventilation floor is inclined at an angle between 20 ° and 70 °, preferably between 30 ° and 60 °, to the vertical.
  • Ventilation trays of the devices in a series for different throughputs only in the width and not in the vertical height of each other. This causes in addition to the already much more favorable ratio of width to vertical height and then no increase in height, if the device must be designed with a higher throughput. Further advantages and embodiments of the invention will be explained in more detail below with reference to the description of some exemplary embodiments and the drawing.
  • 1 is a schematic side view of the device for sifting
  • FIG. 2 is a schematic sectional view along the line III-III of Fig. 1,
  • FIG. 3 is a sectional view of the detail III of Fig. 1,
  • FIG. 4 shows a flow chart of a grinding plant with a device according to the invention for sighting
  • Fig. 5 is a side view of a device for sifting with a
  • FIG. 6 is a schematic sectional view along the line VI-VI of Fig. 5,
  • Fig. 7 is a schematic side view of a device for sifting with a
  • FIG. 8 is a schematic, partially sectioned plan view of Fig. 7,
  • Fig. 9 is a schematic view of means for deagglomerating according to a first embodiment
  • FIGS. 1 to 3 are schematic views of deagglomerating means according to a second embodiment.
  • the apparatus 100 for sifting feed material shown in FIGS. 1 to 3 consists essentially of a static sifter 1, which has a ventilation floor Ia oriented obliquely to the vertical, through which viewing gas 2 flows, an inlet opening 3 for discharging the feed material 9 onto the aeration floor Auslassöffhung 4 for the coarse material, a downstream dynamic classifier 5, which comprises at least one rotor 5 a, and at least one Auslassöffhung 6 for the loaded with fines sight gas 2 '.
  • the ventilation floor Ia is inclined at an angle "between 20 ° and 70 °, preferably between 30 ° and 60 °, to the vertical. In the illustrated
  • the surface of the aeration bottom 1 a is flat and provided with ventilation openings Ib, in particular ventilation slots (see Fig. 3).
  • the static classifier 1 and the dynamic classifier 5 are accommodated in a common housing 7, the dynamic classifier being arranged obliquely above the ventilation floor in the side view shown in FIG. 1.
  • the feed material 9 supplied via the inlet opening 3 slips downwards over the ventilation floor 1 a and is thereby traversed transversely by the viewing gas.
  • the fine material of the feed material is carried with the classifying gas 2 to the dynamic classifier, which comprises one or more rotors, in particular rod baskets.
  • the rejected in the region of the rotor medium grain fraction is passed through a disposed within the housing return 8 to 4 Auslassöffhung for the coarse material.
  • the rotor is expediently mounted on both sides and can correspond in its width to the width of the ventilation floor. It would also be conceivable that the width of the rotor is larger or in particular smaller than the width of the
  • Ventilation bottom is formed.
  • a housing transition piece is provided between the static and dynamic classifier, which connects the housing sections of the housing 7 of different widths in the area of the static classifier or the dynamic classifier.
  • the apparatus 100 for sifting with a high-bed roller mill 200 comprises, in addition to the actual classifier, a device 101 for distributing the material to be dispensed across the width of the aeration bottom 1a and means 102 for deagglomerating the material returned from the material bed roller mill 200 to the device for sifting.
  • FIGS. 5 and 6 show a first exemplary embodiment of a device 101 for distributing the feed material over the width of the ventilation floor.
  • This device consists in the illustrated embodiment of baffles which are arranged in the feed chute 7 a of the housing 7.
  • the baffles 101a are designed so that they distribute the feed material 9, which is fed via conveyor 10 in a certain width, to the width b of the ventilation floor Ia.
  • the device 101 is formed by a vibrating groove 101 'a.
  • a bellows breaker 102a according to FIG. 10 is considered, which is expediently arranged below the good-bed roller mill 200.
  • a blower wheel 102'a according to FIG. 9 would also be conceivable, for example.
  • the mass flow of the feed material on the aeration bottom 1 a decreases from top to bottom, since during the residence more and more fines are discharged with the classifying air. This reduces the flow resistance of the feed material in the direction of the outlet opening 4 for the coarse material. So that the classifying air can nevertheless flow uniformly through the feed material, the aeration bottom is designed such that it produces a pressure drop of 2 mbar to 8 mbar, preferably 3 mbar to 4 mbar.
  • the above-described device for sifting is characterized in that the ventilation floors Ia of devices in a series for different throughputs differ only in the width b and not in the vertical height h from each other. This means that the device only increases in width while the overall height remains substantially the same. This, in turn, means that the visual efficiency is substantially the same for devices having different throughputs because, unlike conventional devices, the dwell time, which is essentially determined by the vertical height, remains unchanged.
  • the width of the dynamic rotor is preferably changed linearly with the width of the static ventilation floor.
  • the width of the rotor may differ in principle from the width of the static stage. In particular, the requirements in the final grinding and partial finishing with partial
  • the device according to the invention for the screening of feed material is characterized by a high visual efficiency and, in comparison to the known cascade classifiers, requires a significantly lower overall height, whereby costs are saved.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Combined Means For Separation Of Solids (AREA)
  • Disintegrating Or Milling (AREA)
  • Crushing And Grinding (AREA)
  • Glass Compositions (AREA)
  • Apparatus For Radiation Diagnosis (AREA)
  • Sheets, Magazines, And Separation Thereof (AREA)
  • Electrical Discharge Machining, Electrochemical Machining, And Combined Machining (AREA)
  • Soil Working Implements (AREA)

Abstract

The device has a static separator (1) with an inclined aeration base (1a) through which separator gas (2) flows, where the aeration base is arranged in a vertical direction. An inlet opening (3) feeds raw material (9) to the aeration base, and an outlet opening (4) is provided for coarse particles. A downstream dynamic separator (5) has a rotor (5a) and another outlet opening for the separator gas loaded with fine particles. A ratio of breadth to height of the aeration base is 0.6.

Description

Vorrichtung zum Sichten von AufgabegutDevice for sifting feed
Die Erfindung betrifft eine Vorrichtung zum Sichten von Aufgabegut mit einem statischen Sichter, der einen schräg zur Vertikalen ausgerichteten, von Sichtgas durchströmten Belüftungsboden aufweist sowie einem nachgeschalteten dynamischen Sichter.The invention relates to a device for sifting feedstock with a static sifter having an obliquely oriented to the vertical, traversed by classifying gas ventilation base and a downstream dynamic classifier.
Aus der DE 4223 762 ist ein Sichter zum Sichten von körnigem Gut bekannt, der einen Stabkorbsichter sowie einen vorgeschalteten, schachtförmigen Kaskadensichter aufweist. Dieser Kaskadensichter weist zwei zur Vertikalen geneigte, gegenüberliegende und zwischen sich eine Vorsichtungszone bildende Schachtbegrenzungswände auf, die für die Sichtluft durchlässig sind. Die Schachtbegrenzungswände werden durch geneigte, jalousieartige Leitbleche gebildet, die von Sichtluft quer durchströmt werden. Der Kaskadensichter wird im Kreislaufbetrieb mit einer Gutbettwalzenmühle betrieben, wobei die Leitbleche zumFrom DE 4223 762 a sifter for sifting granular material is known, which has a rod basket classifier and an upstream, shaft-shaped cascade classifier. This cascade classifier has two inclined to the vertical, opposite and between them a caution zone forming Schachtbegrenzungswände, which are permeable to the Sichtluft. The shaft boundary walls are formed by inclined, louvre-like baffles, which are traversed by view air across. The cascade classifier is operated in circulation operation with a good bed roller mill, the baffles for
Desagglomerieren, d.h. zum Aufschließen der in der Gutbettwalzenmühle gebildeten Schülpen dienen. Das Aufgabegut wird von oben dem Kaskadensichter aufgegeben und fällt über die treppenartig angeordneten Leitbleche nach unten und wird dabei desagglomeriert und gesichtet. Die Feinbestandteile werden zusammen mit der Sichtluft, dem Stabkorbsichter zugeführt, während die groben Bestandteile nach unten herausgeführt werden.Deagglomerate, i. serve to unlock the scabs formed in the machine bed roll mill. The feed material is fed from above the cascade classifier and falls over the staircase-like baffles down and is thereby deagglomerated and sighted. The fines, along with the classifying air, are fed to the rod cage sifter while the coarse components are led down.
Die Dimensionierung der Zuführorgane zum Sichter erfolgt anhand der zu bewältigenden Gutströme und liefert kompakte schmale Massenströme im Vergleich zum Sichter. Die Anforderungen an eine hohe Sichteffizienz verlangen zum einen die Begrenzung der Aufgabemenge pro Sichterbreite und zum anderen eine ausreichende Zahl von - aus Materialflussrichtung - sequentiell geschalteten Sichtstufen der Kaskade. Als weitere wesentliche Einflussgrößen auf die Sichteffizienz wirken sich die Gleichmäßigkeit der Breitenverteilung von Sichtgut und Sichtluft aus. Bei breiteren Sichtern ist diese Gleichmäßigkeit schwieriger zu realisieren, weshalb die Zahl der Sichtstufen mit der Größe zunimmt. Bei Sichtern für kleine Aufgabemengen liegt das Breiten-/Höhenverhältnis daher bei etwa 0,15 und nimmt bei größeren Mengen auf ca. 0,35 zu Diese hohen und schmalen Bauformen führen zu großen Kosten für die Materialtransporte und die Gebäude.The dimensioning of the feed to the separator takes place on the basis of the Gutströme to be handled and provides compact narrow mass flows compared to the classifier. The requirements for a high visual efficiency demand on the one hand the limitation of the feed quantity per classifier width and on the other hand a sufficient number of - from material flow direction - sequentially switched sight levels of the cascade. Another important factor influencing the visual efficiency is the uniformity of the width distribution of the visible material and the classifying air. With wider classifiers, this uniformity is more difficult to realize, which is why the number of vision stages increases with size. With classifiers therefore, the width / height ratio is about 0.15 for small feed quantities and increases to about 0.35 for larger quantities. These tall and narrow designs lead to high costs for material transports and buildings.
hi der DE 103 50 518 wird daher bei großen Durchsatzleistungen eine Sichtereinrichtung zum Sichten von körnigem Gut vorgeschlagen, die einen statischen Kaskadensichter mit wenigstens einer vom schachtförmigen Sichtgehäuse umschlossenen und einem von der Vertikalen abweichenden Winkel schrägliegend angeordneten Sichtzone und einen dynamischen Stabkorbsichter umfasst. DieIn DE 103 50 518, therefore, a sifting device for sifting granular material is proposed for large throughput capacities, comprising a static cascade classifier with at least one obliquely arranged viewing zone from the shaft-shaped viewing housing and an angle diverging from the vertical viewing zone and a dynamic rod basket sifter. The
Besonderheit besteht darin, dass das Sichtgaseintrittsgehäuse der Sichteinrichtung in der Draufsicht betrachtet eine Strömungsverzweigung auf zwei Stränge nach Art eines Hosenrohres aufweist, wobei in beiden Hosenrohr-Gehäuseabzweigen ein fliegend gelagerter Stabkorb angeordnet ist. Die spiegelbildlich gegenüberliegend angeordneten stirnseitigen Stabkorb- Austragsenden sind zum Auslass des mitA special feature is that the Sichtgasseintrittsgehäuse the viewing device viewed in plan view has a flow branching on two strands in the manner of a bifurcated tube, wherein in both bifurcated housing branch branches a cantilevered rod basket is arranged. The mirror image opposite arranged front Stabkorb- discharge ends are to the outlet of
Feingut beladenden Sichtgasstromes über einen weiteren Gehäuseteil zu einem gemeinsamen Abzugsgehäuse zusammengeführt. Gemäß einer ersten Variante sind in beiden Hosenrohr-Gehäuseabzweigen jeweils ein statischer Kaskadensichter angeordnet. In einer zweiten Variante ist ein gemeinsamer Kaskadensichter vor der Verzweigung vorgesehen.Fines laden sight gas flow over another housing part merged to form a common trigger housing. According to a first variant, a static cascade classifier is arranged in each of the two branch pipe branch branches. In a second variant, a common cascade classifier is provided before the branch.
Die Ausführungsform mit jeweils zwei separaten Kaskadensichtern und zwei separaten Stabkorbsichtern verursacht relativ hohe Kosten. Aber auch die Variante mit einem gemeinsamen Kaskadensichter ist relativ teuer, da der Kaskadensichter bei einer hohen Durchsatzleistung durch sein ungünstiges Breiten/Höhenverhältnis eine sehr hohe Bauhöhe benötigt.The embodiment with two separate cascade classifiers and two separate rod basket classifiers causes relatively high costs. But even the variant with a common Cascade classifier is relatively expensive, since the Cascade classifier at a high throughput due to its unfavorable width / height ratio requires a very high height.
Der Erfindung liegt daher die Aufgabe zugrunde, die Bauhöhe der Vorrichtung zum Sichten mit einem statischen und dynamischen Sichter wesentlich zu verkleinern und die Sichteffizienz bei Sichtern mit unterschiedlichen Durchsatzleistungen zu verbessern. Erfϊndungsgemäß wird diese Aufgabe durch die Merkmale des Anspruches 1 gelöst.The invention is therefore based on the object to significantly reduce the height of the device for sifting with a static and dynamic sifter and to improve the visual efficiency in viewers with different throughputs. Erfϊndungsgemäß this object is achieved by the features of claim 1.
Die erfindungsgemäße Vorrichtung zum Sichten von Aufgabegut besteht im Wesentlichen aus einem statischen Sichter, der einen schräg zur Vertikalen ausgerichteten, von Sichtgas durchströmten Belüftungsboden aufweist, einerThe inventive device for sifting feed essentially consists of a static sifter which has a ventilation base which is oriented obliquely to the vertical and through which viewing gas flows
Einlassöffhung zur Aufgabe des Aufgabegutes auf den Belüftungsboden, einerInlet opening to the task of the feed material on the aeration floor, a
Auslassöffnung für das Grobgut, einem nachgeschalteten dynamischen Sichter, der wenigstens einen Rotor umfasst und einer Auslassöffnung für das mit Feingut beladende Sichtgas. Der Belüftungsboden weist dabei ein Verhältnis von Breite zu vertikaler Höhe von wenigstens 0.45, vorzugsweise von wenigstens 0.6 auf.Outlet opening for the coarse material, a downstream dynamic classifier, which comprises at least one rotor and an outlet opening for the laden with fines sight gas. The ventilation floor has a ratio of width to vertical height of at least 0.45, preferably of at least 0.6.
Weitere Ausgestaltung der Erfindung sind Gegenstand der Unteransprüche.Further embodiment of the invention are the subject of the dependent claims.
Gemäß einer bevorzugten Ausführungsform ist ferner eine Einrichtung zumAccording to a preferred embodiment, a device for
Verteilen des Aufgabegutes über die Breite des Belüftungsbodens vorgesehen. Weiterhin sind dem statischen Sichter zweckmäßigerweise Mittel zum Desagglomerieren vorgeschaltet.Distributing the feed material provided over the width of the ventilation floor. Furthermore, the static sifter expediently preceded by means for deagglomerating.
Gemäß einer bevorzugten Ausführungsform ist die Oberfläche des Belüftungsbodens plan ausgebildet und mit Belüftungsöffnungen, insbesondere Belüftungsschlitzen, versehen. Der Belüftungsboden wird mit einem Winkel zwischen 20° und 70°, vorzugsweise zwischen 30° und 60°, zur Vertikalen geneigt angeordnet.According to a preferred embodiment, the surface of the ventilation floor is flat and provided with ventilation openings, in particular ventilation slots. The ventilation floor is inclined at an angle between 20 ° and 70 °, preferably between 30 ° and 60 °, to the vertical.
Gemäß einer bevorzugten Ausgestaltung der Erfindung unterscheiden sich dieAccording to a preferred embodiment of the invention, the differ
Belüftungsböden der Vorrichtungen im Rahmen einer Baureihe für verschiedene Durchsatzleistungen nur in der Breite und nicht in der vertikalen Höhe voneinander. Dies bewirkt neben dem ohnehin schon wesentlich günstigeren Verhältnis von Breite zu vertikaler Höhe auch dann keine Steigerung der Bauhöhe, wenn die Vorrichtung mit einer höheren Durchsatzleistung konzipiert werden muss. Weitere Vorteile und Ausgestaltungen der Erfindung werden im Folgenden anhand der Beschreibung einiger Ausfuhrungsbeispiele und der Zeichnung näher erläutert.Ventilation trays of the devices in a series for different throughputs only in the width and not in the vertical height of each other. This causes in addition to the already much more favorable ratio of width to vertical height and then no increase in height, if the device must be designed with a higher throughput. Further advantages and embodiments of the invention will be explained in more detail below with reference to the description of some exemplary embodiments and the drawing.
In der Zeichnung zeigenIn the drawing show
Fig. 1 eine schematische Seitenansicht der Vorrichtung zum Sichten,1 is a schematic side view of the device for sifting,
Fig. 2 eine schematische Schnittdarstellung längs der Linie III- III der Fig. 1,2 is a schematic sectional view along the line III-III of Fig. 1,
Fig. 3 eine Schnittdarstellung des Details III der Fig. 1,3 is a sectional view of the detail III of Fig. 1,
Fig. 4 ein Flussdiagramm einer Mahlanlage mit einer erfindungsgemäßen Vorrichtung zum Sichten,4 shows a flow chart of a grinding plant with a device according to the invention for sighting,
Fig. 5 eine Seitenansicht einer Vorrichtung zum Sichten mit einerFig. 5 is a side view of a device for sifting with a
Verteileinrichtung gemäß eines ersten Ausführungsbeispiels,Distribution device according to a first embodiment,
Fig. 6 eine schematische Schnittdarstellung längs der Linie VI-VI der Fig. 5,6 is a schematic sectional view along the line VI-VI of Fig. 5,
Fig. 7 eine schematische Seitenansicht einer Vorrichtung zum Sichten mit einerFig. 7 is a schematic side view of a device for sifting with a
Einrichtung zum Verteilen gemäß eines zweiten Ausführungsbeispiels,Device for distributing according to a second embodiment,
Fig. 8 eine schematische, teilweise geschnittene Draufsicht der Fig. 7,8 is a schematic, partially sectioned plan view of Fig. 7,
Fig. 9 eine schematische Ansicht von Mitteln zum Desagglomerieren gemäß eines ersten Ausführungsbeispiels undFig. 9 is a schematic view of means for deagglomerating according to a first embodiment and
Fig. 10 eine schematische Ansicht von Mitteln zum Desagglomerieren gemäß eines zweiten Ausführungsbeispiels. Die in den Figuren 1 bis 3 dargestellte Vorrichtung 100 zum Sichten von Aufgabegut besteht im Wesentlichen aus einem statischen Sichter 1, der einen schräg zur Vertikalen ausgerichteten, von Sichtgas 2 durchströmten Belüftungsboden Ia, einer Einlassöffhung 3 zur Aufgabe des Aufgabegutes 9 auf den Belüftungsboden, einer Auslassöffhung 4 für das Grobgut, einem nachgeschalteten dynamischen Sichter 5, der wenigstens einen Rotor 5 a umfasst, und wenigstens einer Auslassöffhung 6 für das mit Feingut beladene Sichtgas 2'.10 is a schematic view of deagglomerating means according to a second embodiment. The apparatus 100 for sifting feed material shown in FIGS. 1 to 3 consists essentially of a static sifter 1, which has a ventilation floor Ia oriented obliquely to the vertical, through which viewing gas 2 flows, an inlet opening 3 for discharging the feed material 9 onto the aeration floor Auslassöffhung 4 for the coarse material, a downstream dynamic classifier 5, which comprises at least one rotor 5 a, and at least one Auslassöffhung 6 for the loaded with fines sight gas 2 '.
Der Belüftungsboden Ia ist mit einem Winkel «zwischen 20° und 70°, vorzugsweise zwischen 30° und 60°, zur Vertikalen geneigt angeordnet. Im dargestelltenThe ventilation floor Ia is inclined at an angle "between 20 ° and 70 °, preferably between 30 ° and 60 °, to the vertical. In the illustrated
Ausfuhrungsbeispiel ist die Oberfläche des Belüftungsboden 1 a plan ausgebildet und mit Belüftungsöffhungen Ib, insbesondere Belüftungsschlitzen versehen (siehe Fig. 3).Exemplary embodiment, the surface of the aeration bottom 1 a is flat and provided with ventilation openings Ib, in particular ventilation slots (see Fig. 3).
Der Belüftungsboden Ia weist ein Verhältnis von Breite b zu vertikaler Höhe h von wenigstens 0,45 vorzugsweise von wenigstens 0,6, auf. Demnach ist die Breite des Belüftungsbodens wesentlich größer als bei bekannten leistungsgleichen Ausführungen und trägt daher zur Verringerung der Bauhöhe der Vorrichtung zum Sichten entscheidend bei. (Bemerkung: Beim b/h = 0,6 ist die Breite kleiner als die Höhe!).The ventilation floor 1a has a ratio of width b to vertical height h of at least 0.45, preferably of at least 0.6. Accordingly, the width of the ventilation floor is much larger than in known equivalent power versions and therefore contributes to reducing the height of the device for sifting crucial. (Note: At b / h = 0.6, the width is smaller than the height!).
Der statische Sichter 1 und der dynamische Sichter 5 sind in einem gemeinsamen Gehäuse 7 untergebracht, wobei der dynamische Sichter in der in Fig.l gezeigten Seitenansicht schräg oberhalb des Belüftungsbodens angeordnet ist.The static classifier 1 and the dynamic classifier 5 are accommodated in a common housing 7, the dynamic classifier being arranged obliquely above the ventilation floor in the side view shown in FIG. 1.
Das über die Einlassöffnung 3 zugeführte Aufgabegut 9 rutscht über den Belüftungsboden 1 a nach unten und wird dabei vom Sichtgas quer durchströmt. Das Feingut des Aufgabegutes wird mit dem Sichtgas 2 zum dynamischen Sichter getragen, der ein oder mehrere Rotoren, insbesondere Stabkörbe umfasst. Die im Bereich des Rotors abgewiesene Mittelkornfraktion wird über eine innerhalb des Gehäuses angeordnete Rückführung 8 zur Auslassöffhung 4 für das Grobgut geleitet. Der Rotor ist zweckmäßigerweise beidseitig gelagert und kann in seiner Breite der Breite des Belüftungsbodens entsprechen. Es wäre aber auch denkbar, dass die Breite des Rotors größer bzw. insbesondere kleiner als die Breite desThe feed material 9 supplied via the inlet opening 3 slips downwards over the ventilation floor 1 a and is thereby traversed transversely by the viewing gas. The fine material of the feed material is carried with the classifying gas 2 to the dynamic classifier, which comprises one or more rotors, in particular rod baskets. The rejected in the region of the rotor medium grain fraction is passed through a disposed within the housing return 8 to 4 Auslassöffhung for the coarse material. The rotor is expediently mounted on both sides and can correspond in its width to the width of the ventilation floor. It would also be conceivable that the width of the rotor is larger or in particular smaller than the width of the
Belüftungsboden ausgebildet ist. Für diesen Fall ist zwischen dem statischen und dynamischen Sichter ein Gehäuseübergangsstück vorgesehen, welches die unterschiedlich breiten Gehäusebereiche des Gehäuses 7 im Bereich des statischen Sichters bzw. des dynamischen Sichters miteinander verbindet.Ventilation bottom is formed. For this case, a housing transition piece is provided between the static and dynamic classifier, which connects the housing sections of the housing 7 of different widths in the area of the static classifier or the dynamic classifier.
In Fig. 4 ist die Vorrichtung 100 zum Sichten mit einer Gutbettwalzenmühle 200 dargestellt. Die Vorrichtung 100 umfasst neben dem eigentlichen Sichter noch eine Einrichtung 101 zum Verteilen des Aufgabegutes über die Breite des Belüftungsbodens Ia sowie Mittel 102 zum Desagglomerieren des von der Gutbettwalzenmühle 200 zur Vorrichtung zum Sichten zurückgeführten Gutes.4, the apparatus 100 for sifting with a high-bed roller mill 200 is shown. The device 100 comprises, in addition to the actual classifier, a device 101 for distributing the material to be dispensed across the width of the aeration bottom 1a and means 102 for deagglomerating the material returned from the material bed roller mill 200 to the device for sifting.
In den Figuren 5 und 6 ist ein erstes Ausführungsbeispiel einer Einrichtung 101 zum Verteilen des Aufgabegutes über die Breite des Belüftungsbodens dargestellt. Diese Einrichtung besteht im dargestellten Ausfuhrungsbeispiel aus Leitblechen die im Zuführschacht 7a des Gehäuses 7 angeordnet sind. Die Leitbleche 101a sind dabei so ausgebildet, dass sie das Aufgabegut 9, welches über Fördermittel 10 in einer bestimmten Breite aufgegeben wird, auf die Breite b des Belüftungsbodens Ia verteilen.FIGS. 5 and 6 show a first exemplary embodiment of a device 101 for distributing the feed material over the width of the ventilation floor. This device consists in the illustrated embodiment of baffles which are arranged in the feed chute 7 a of the housing 7. The baffles 101a are designed so that they distribute the feed material 9, which is fed via conveyor 10 in a certain width, to the width b of the ventilation floor Ia.
Anstelle einer statischen Einrichtung zum Verteilen des Aufgabegutes sind aber auch dynamische Mittel denkbar. In den Figuren 7 und 8 wird die Einrichtung 101 durch eine vibrierende Rinne 101 'a gebildet.Instead of a static device for distributing the feed but also dynamic means are conceivable. In FIGS. 7 and 8, the device 101 is formed by a vibrating groove 101 'a.
Für die vorgeschalteten Mittel 102 zum Desagglomerieren kommt beispielsweise ein Schülpenbrecher 102a gemäß Fig. 10 in Betracht, der zweckmäßigerweise unterhalb der Gutbettwalzenmühle 200 angeordnet wird. Als Alternative wäre beispielsweise aber auch ein Schleuderrad 102'a gemäß Fig. 9 denkbar. Der Massenstrom des Aufgabegutes auf dem Belüftungsboden 1 a nimmt von oben nach unten ab, da während der Verweilzeit immer mehr Feingut mit der Sichtluft ausgetragen wird. Dadurch verringert sich der Durchflusswiderstand des Aufgabegutes in Richtung zur Auslassöffnung 4 für das Grobgut. Damit die Sichtluft trotzdem gleichmäßig durch das Aufgabegut strömen kann, ist der Belüftungsboden derart ausgebildet, dass er einen Druckabfall von 2 mbar bis 8 mbar, vorzugsweise 3 mbar bis 4 mbar erzeugt.For the preceding means 102 for deagglomeration, for example, a bellows breaker 102a according to FIG. 10 is considered, which is expediently arranged below the good-bed roller mill 200. Alternatively, however, a blower wheel 102'a according to FIG. 9 would also be conceivable, for example. The mass flow of the feed material on the aeration bottom 1 a decreases from top to bottom, since during the residence more and more fines are discharged with the classifying air. This reduces the flow resistance of the feed material in the direction of the outlet opening 4 for the coarse material. So that the classifying air can nevertheless flow uniformly through the feed material, the aeration bottom is designed such that it produces a pressure drop of 2 mbar to 8 mbar, preferably 3 mbar to 4 mbar.
Die obenbeschriebene Vorrichtung zum Sichten zeichnet sich dadurch aus, dass sich die Belüftungsböden Ia von Vorrichtungen im Rahmen einer Baureihe für verschiedene Durchsatzleistungen nur in der Breite b und nicht in der vertikalen Höhe h voneinander unterscheiden. Dies bedeutet, dass sich die Vorrichtung lediglich in der Breite vergrößert, während die Bauhöhe im Wesentlichen gleich bleibt. Dies wiederum bedeutet, dass die Sichteffizienz für Vorrichtungen mit unterschiedlichen Durchsatzleistungen im Wesentlichen gleich sind, da im Gegensatz zu herkömmlichen Vorrichtungen die Verweilzeit, die im Wesentlichen durch die vertikale Höhe bestimmt wird, unverändert bleibt.The above-described device for sifting is characterized in that the ventilation floors Ia of devices in a series for different throughputs differ only in the width b and not in the vertical height h from each other. This means that the device only increases in width while the overall height remains substantially the same. This, in turn, means that the visual efficiency is substantially the same for devices having different throughputs because, unlike conventional devices, the dwell time, which is essentially determined by the vertical height, remains unchanged.
Mit zunehmender Breite wird die Einrichtung zum Verteilen des Aufgabegutes über die Breite des Belüftungsbodens immer wichtiger. Im Rahmen der Baureihenbetrachtung wird die Breite des dynamischen Rotors vorzugsweise linear mit der Breite des statischen Belüftungsbodens verändert. Dabei kann die Breite des Rotors prinzipiell von der Breite der statischen Stufe abweichen. Insbesondere sind die Anforderungen in der Fertigmahlung und Teilfertigmahlung mit partiellerWith increasing width, the device for distributing the feed over the width of the ventilation floor is becoming increasingly important. As part of the series consideration, the width of the dynamic rotor is preferably changed linearly with the width of the static ventilation floor. The width of the rotor may differ in principle from the width of the static stage. In particular, the requirements in the final grinding and partial finishing with partial
Fertiggutausschleusung im Produktionsprozess grundsätzlich unterschiedlich, so dass hier feste Kombinationen unterschiedlich breiter statischer und dynamischer Sichter eingesetzt werden können. Die Sichträume der statischen und der dynamischen Stufe werden dann ggf. über Übergangsstücke verbunden. Je stärker der Belüftungsboden Ia belüftet wird, desto flacher kann er eingebaut werden. Unter Berücksichtigung des üblichen Sichtluftbedarfs und des Materialfließ Verhaltens wird man vorzugsweise eine Neigung ca. 45° + -10° verwenden. Dabei wird die Luftaustrittsgeschwindigkeit aus dem Belüftungsboden so hoch gewählt, dass das Aufgabegut überwiegend in der Schwebe gehalten wird und nur das grobe Gut den Belüftungsboden berührt. Damit wird auch verhindert, dass das Gut die Belüftungsöffhungen verstopft und es zu Ablagerungen kommt. Um dies zu erreichen, sollten Luftgeschwindigkeiten an den Austrittsöffhungen Ib des Belüftungsbodens von mindestens 20 m/s, vorzugsweise von 30 m/s eingestellt werden.Finished goods discharge in the production process fundamentally different, so that here fixed combinations of different width static and dynamic classifier can be used. The viewing spaces of the static and dynamic stages are then connected via transition pieces if necessary. The more the ventilation floor Ia is ventilated, the flatter it can be installed. Taking into account the usual demand for visible air and the material flow behavior, it is preferable to use an inclination of approx. 45 ° + -10 °. The air outlet speed from the aeration floor is chosen so high that the feed material is predominantly held in suspension and only the coarse material touches the ventilation floor. This also prevents the material from clogging the ventilation openings and causing deposits. In order to achieve this, air velocities should be set at the outlet openings Ib of the ventilation base of at least 20 m / s, preferably 30 m / s.
Die erfindungsgemäße Vorrichtung zum Sichten von Aufgabegut zeichnet sich durch eine hohe Sichteffizienz aus und benötigt im Vergleich zu den bekannten Kaskadensichtern eine wesentlich geringere Bauhöhe, wodurch Kosten eingespart werden. The device according to the invention for the screening of feed material is characterized by a high visual efficiency and, in comparison to the known cascade classifiers, requires a significantly lower overall height, whereby costs are saved.

Claims

Patentansprüche: claims:
1. Vorrichtung zum Sichten (100) von Aufgabegut mit a. einem statischen Sichter (1), der einen schräg zur Vertikalen ausgerichteten, von Sichtgas (2) durchströmten Belüftungsboden (Ia) aufweist, b. einer Einlassöffhung (3) zur Aufgabe des Aufgabegutes (9) auf den Belüftungsboden (Ia), c. einer Auslassöffhung (4) für das Grobgut, d. einem nachgeschalteten dynamischen Sichter (5), der wenigstens einen Rotor1. Apparatus for sifting (100) feed with a. a static sifter (1), which has a ventilation base (Ia) oriented obliquely to the vertical, through which viewing gas (2) flows, b. an inlet opening (3) for the task of the feed material (9) on the ventilation floor (Ia), c. an outlet opening (4) for the coarse material, d. a downstream dynamic classifier (5), the at least one rotor
(5 a) umfasst und e. wenigstens einer Auslassöffhung (6) für das mit Feingut beladene Sichtgas 2'(5 a) and e. at least one outlet opening (6) for the fines gas loaded with fines 2 '
dadurch gekennzeichnet, dasscharacterized in that
der Belüftungsboden (Ia) ein Verhältnis von Breite (b) zu vertikaler Höhe (h) von wenigstens 0.45, vorzugsweise von wenigstens 0.6, aufweist.the aerating base (Ia) has a ratio of width (b) to vertical height (h) of at least 0.45, preferably of at least 0.6.
2. Vorrichtung nach Anspruch 1, dadurch gekennzeichnet, dass ferner eine Einrichtung (101) zum gleichmäßigen Verteilen des Aufgabegutes über die2. Apparatus according to claim 1, characterized in that further comprises means (101) for uniformly distributing the feed material over the
Breite des Belüftungsbodens vorgesehen ist.Width of the ventilation floor is provided.
3. Vorrichtung nach Anspruch 1, dadurch gekennzeichnet, dass dem statischen Sichter Mittel (102) zum Desagglomerieren vorgeschaltet sind.3. A device according to claim 1, characterized in that the static separator means (102) are connected upstream for deagglomeration.
4. Vorrichtung nach Anspruch 1, dadurch gekennzeichnet, dass sich die Breite des Rotors (5a) von der Breite des Belüftungsbodens (Ia) unterscheidet und zwischen statischem und dynamischem Sichter ein Gehäuseübergangsstück vorgesehen ist. 4. The device according to claim 1, characterized in that the width of the rotor (5a) differs from the width of the ventilation floor (Ia) and between the static and dynamic classifier, a housing transition piece is provided.
5. Vorrichtung nach Anspruch 1, dadurch gekennzeichnet, dass die Oberfläche des Belüftungsbodens (Ia) plan ausgebildet und mit Belüftungsöffhungen (Ib) versehen ist.5. The device according to claim 1, characterized in that the surface of the ventilation floor (Ia) is flat and provided with ventilation openings (Ib).
6. Vorrichtung nach Anspruch 1, dadurch gekennzeichnet, dass der6. The device according to claim 1, characterized in that the
Belüftungsboden (Ia) mit einem Winkel zwischen 20° und 70°, vorzugsweise zwischen 30° und 60°, zur Vertikalen geneigt ist.Ventilation bottom (Ia) with an angle between 20 ° and 70 °, preferably between 30 ° and 60 °, inclined to the vertical.
7. Vorrichtung nach Anspruch 1, dadurch gekennzeichnet, dass der Belüftungsboden (Ia) derart ausgestaltet ist, dass er einen Druckabfall von 2 mbar bis 8 mbar, vorzugsweise 3 mbar bis 4 mbar, erzeugt.7. The device according to claim 1, characterized in that the aeration bottom (Ia) is designed such that it produces a pressure drop of 2 mbar to 8 mbar, preferably 3 mbar to 4 mbar.
8. Vorrichtung nach Anspruch 1, dadurch gekennzeichnet, dass sich die Belüftungsböden (Ia) von Vorrichtungen im Rahmen einer Baureihe für verschiedene Durchsatzleistungen nur in der Breite (b) und nicht in der vertikalen8. The device according to claim 1, characterized in that the ventilation floors (Ia) of devices in a series for different throughputs only in the width (b) and not in the vertical
Höhe (h) voneinander unterscheiden.Height (h) differ from each other.
9. Mahlanlage mit einer Vorrichtung nach ein oder mehreren der Ansprüche 1 bis 8 sowie einer Gutbettwalzenmühle. 9. grinding plant with a device according to one or more of claims 1 to 8 and a Gutbettwalzenmühle.
EP06791672A 2005-09-23 2006-08-25 Apparatus for classifying charge material Not-in-force EP1786573B1 (en)

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DE102005045591A DE102005045591A1 (en) 2005-09-23 2005-09-23 Raw material e.g. granular material, separating device for use in grinding plant, has static separator with aeration base through which gas flows, where base is arranged in vertical direction and has specific ratio of breadth to height
PCT/EP2006/008363 WO2007036276A1 (en) 2005-09-23 2006-08-25 Apparatus for classifying charge material

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EP1786573B1 EP1786573B1 (en) 2010-06-09

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EP (1) EP1786573B1 (en)
JP (1) JP5491029B2 (en)
CN (1) CN101272871B (en)
AT (1) ATE470514T1 (en)
BR (1) BRPI0616336A8 (en)
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CA2623147C (en) 2015-09-29
CN101272871B (en) 2013-03-06
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BRPI0616336A8 (en) 2015-04-28
ATE470514T1 (en) 2010-06-15
JP5491029B2 (en) 2014-05-14
US20080185318A1 (en) 2008-08-07
CA2623147A1 (en) 2007-04-05
DE502006007156D1 (en) 2010-07-22
BRPI0616336A2 (en) 2011-06-14
EP1786573B1 (en) 2010-06-09
DK1786573T3 (en) 2010-10-04
WO2007036276A1 (en) 2007-04-05
CN101272871A (en) 2008-09-24
ES2344022T3 (en) 2010-08-16

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