EP0386520B1 - Material bed roller mill - Google Patents

Material bed roller mill Download PDF

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Publication number
EP0386520B1
EP0386520B1 EP90103272A EP90103272A EP0386520B1 EP 0386520 B1 EP0386520 B1 EP 0386520B1 EP 90103272 A EP90103272 A EP 90103272A EP 90103272 A EP90103272 A EP 90103272A EP 0386520 B1 EP0386520 B1 EP 0386520B1
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EP
European Patent Office
Prior art keywords
walls
material bed
roll
guide walls
vertical
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EP90103272A
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German (de)
French (fr)
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EP0386520A2 (en
EP0386520A3 (en
Inventor
Norbert Dipl.-Ing. Patzelt
Gotthardt Dipl.-Ing. Blasczyk
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ThyssenKrupp Industrial Solutions AG
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Krupp Polysius AG
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Priority to AT90103272T priority Critical patent/ATE93165T1/en
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Publication of EP0386520A3 publication Critical patent/EP0386520A3/en
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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B02—CRUSHING, PULVERISING, OR DISINTEGRATING; PREPARATORY TREATMENT OF GRAIN FOR MILLING
    • B02C—CRUSHING, PULVERISING, OR DISINTEGRATING IN GENERAL; MILLING GRAIN
    • B02C4/00—Crushing or disintegrating by roller mills
    • B02C4/28—Details
    • B02C4/286—Feeding devices

Definitions

  • a feed hopper for non-generic egg-shaped briquette presses is known.
  • this feed hopper two movable slides are provided opposite one another, the spacing of which can be adjusted simultaneously and parallel to one another with the aid of rack and pinion drives.
  • the flow rate of the - generally soft - briquette mass should be able to be regulated quickly. Little can be found in this publication about the more precise design of the associated egg-shaped briquette presses.
  • a material bed roller mill of the type required in the preamble of claim 1 is, for example, from DE-A-35 35 406 known.
  • two opposing, slide-like covers are provided, which can be shifted in a straight line against each other in order to change the material feed width and / or the height of the material column on the rollers can.
  • These slide-like covers give the filling shaft a funnel shape at its lower end with an outlet opening that can be changed in cross section.
  • the invention has for its object to improve a material bed roller mill of the type required in the preamble of claim 1 in such a way that, with a relatively simple structural design, the pressure which is established by the mill column above the rollers can be used as much as possible for material bed comminution even with fluctuating supply of mill material .
  • guide walls are arranged vertically and, while maintaining their vertical position transversely to the vertical central plane of the material bed roller mill, and optionally also individually and therefore independently of one another.
  • the regrind flow fed to the nip is laterally so through the adjustable, vertical guide walls limited that a minimum height of the regrind column that is formed can be maintained both with smaller and with larger amounts of regrind. Since the adjustable guide walls retain their vertical position even with a transverse adjustment, the regrind pressure, which is formed by the regrind column above the rollers, can be fully utilized for comminution of the crop bed in the area of the roller gap.
  • the regrind column laterally delimited by the guide walls is aligned symmetrically to the vertical center plane of the material bed roller mill. This is generally expedient if the drive motors of the two grinding rollers have the same power consumption due to a corresponding composition of the material to be ground.
  • the regrind is of different origin and / or has a very different grain size (if, for example, uncrushed fresh material and recycled semolina are fed together to the filling chute), it can happen that the two grinding rollers are loaded to different extents when the regrind column is fed symmetrically to the nip , so that the drive motors of the two grinding rollers have a different power consumption.
  • the regrind column can then, for example, by transverse adjustment of only one guide wall asymmetrical to the vertical center plane of the roller mill be set so that the power consumption of the drive motors of both rollers is balanced again.
  • FIGS. 1, 2 and 3 each show schematically held, largely similar cross-sectional views through a material bed roller mill according to the invention, in which three figures of the drawing. only vertical guide walls of the hopper each occupy different positions.
  • the material bed roller mill contains two rollers 1, 2 which are arranged next to one another and are pressed against one another with high grinding force, of which the roller 1 is designed as a fixed roller and the roller 2 as a loose roller.
  • the loose roller 2 is movably mounted in the direction of the double arrow 3 and thus in the direction of the fixed roller 1, as is known per se. Both rollers 1, 2 are preferably driven against each other by a separate drive motor, which is not illustrated in detail here.
  • the two vertical guide walls 7a and 7b opposite each other on both sides of the vertical center plane 8 extend parallel to the roller axes 1a, 2a and essentially over the entire axial length (perpendicular to the plane of the drawing of FIGS. 1-3) of the rollers 1 and 2.
  • Both guide walls 7a, 7b can be adjusted jointly or individually and independently of one another in the transverse direction to the vertical central plane 8, ie in the direction of the double arrows 9a, 9b, depending on requirements and design. In this way, a more or less wide symmetrical regrind column 6 or 6a (FIGS. 1 and 2) or asymmetrical regrind column 6b (FIG.
  • the millbase column 6, 6a, 6b is always laterally delimited by vertically running guide walls 7a, 7b, in order thereby to utilize the full pressure generated by the millbase column above the rollers 1, 2 for comminution of the material bed.
  • the height H (FIG.
  • each of the two vertical guide walls 7a, 7b is arranged directly above an associated roller 1 or 2.
  • the lower longitudinal edge 7a 'or 7b' of each guide wall 7a or 7b has a substantially constant minimum distance a from the outer circumferential side 1b, 2b of the associated roller.
  • the filling chute 5 has a chute base body 10, which in the lower, vertical chute section 5a has two stationary chute walls 11a, 11b, which are spaced apart on both sides of the vertical central plane 8 and run parallel to the roller axes 1a, 2a , between which the two vertical guide walls 7a, 7b are arranged so as to be transverse (arrows 9a, 9b).
  • These two stationary shaft walls 11a, 11b also end at a short distance (approximately distance a in FIG. 1) above the outer circumferential side 1b or 2b of the associated roller 1 or 2.
  • transverse distance between these two stationary shaft walls 11a, 11b is so great dimensioned such that the guide walls 7a, 7b, which can move transversely between them, can be adjusted to a maximum width B of the millbase column (approximately millbase column 6 in FIG. 1).
  • the shaft base body 10 also has a funnel-shaped extension in the area of the upper ends 7a ′′, 7b ′′ of the vertical guide walls 7a, 7b — viewed in cross section of the roller mill (cf. representations in FIGS. 1-3), which essentially consists of two preferably equally large, symmetrical to the vertical center plane 8 downward (converging) inclined walls 12a and 12b is formed. These two inclined walls 12a, 12b connect approximately to the upper ends of the stationary shaft walls 11a, 11b. Above the funnel-shaped extension formed in this way, the manhole base body 10 can also have a container-like upper part 10 'with essentially straight side walls in the manner of a storage container.
  • an essentially flat slide wall 13a or 13b is fixed, preferably rigidly connected, which is assigned to one of the inclined walls 12a or 12b of the shaft base body 10.
  • Each of these essentially flat slide walls 13a, 13b is inclined in the same way as the inclined walls 12a, 12b, and each slide wall 13a or 13b is guided and adjustable in the same direction as the double arrows 14a, 14b in or on the associated inclined wall 12a or 12b .
  • each slide wall 13a, 13b can be assigned a suitable adjusting device, not illustrated in more detail, which can be designed for slides in a manner known per se in order to adjust the necessary or desired adjustment options of the vertical guide walls 7a, 7b ( jointly or individually and independently of each other).
  • the slide walls 13a, 13b explained have the advantage that they can extend the inclined walls 12a, 12b of the shaft base body 10 in the direction of the vertical central plane 8 (as an additional inclined funnel guide for the material flow to be supplied).
  • suitable additional adjustment means can also be provided on the lower end sections of the vertical guide walls 7a, 7b, which, in particular with relatively large height dimensions of the vertical guide walls 7a, 7b, for maintaining the vertical position of these guide walls 7a, 7b also worry in this lower section.
  • additional adjustment means could expediently be coupled to the adjustment devices for the slide walls 13a, 13b. It is also understood that other suitable means for transverse adjustment of the vertical guide walls 7a, 7b can also be provided.
  • FIG. 1 shows the greatest clear width B of the ground material column 6 with the vertical guide walls 7a and 7b practically completely displaced outwards. 1, this results in a millbase column 6 with maximum width B that is symmetrical with respect to the vertical center plane 8 of the material bed roller mill or that is symmetrical with respect to the roller gap 4.
  • the two vertical guide walls 7a and 7b are adjusted by an equal amount against the vertical center plane 8, so that here again a regrind column 6a symmetrical with respect to the vertical center plane 8, but of relatively small width B 1 results.
  • FIGS. 1, 2 and 3 reveals that any settings and orientations of the mill column to be fed to the roll nip 4 are possible.
  • the asymmetrical supply of the regrind to the nip 4 is selected to a correspondingly large extent if the power consumption of the drive motor from one roller is higher than that of the other roller, so that this asymmetrical setting of the regrind stream is more pronounced on the outer circumferential side of the one Roller can be steered that the power consumption of the drive motors is the same for both rollers.

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  • Engineering & Computer Science (AREA)
  • Food Science & Technology (AREA)
  • Crushing And Grinding (AREA)
  • Metal Rolling (AREA)
  • Buildings Adapted To Withstand Abnormal External Influences (AREA)

Abstract

The invention relates to a material bed roller mill for crushing brittle material to be ground in the gap between two driven rollers which are pressed against one another with a high grinding force with a filling shaft for the delivery of material provided above the rollers. The width of the stream of material delivered to the roller gap can be altered with the aid of vertical guide walls which are adjustable at right angles to the vertical central plane of the roller mill while maintaining their vertical position. The column of material which is aligned vertically above the rollers creates pressure which is introduced fully into the material bed crushing and if required the column of material can be moved in the cross direction with respect to the rollers.

Description

Die Erfindung betrifft eine Gutbettwalzenmühle enthaltend

  • a) zwei unter Bildung eines Walzenspaltes nebeneinander angeordnete, mit hoher Mahlkraft gegeneinander gepreßte, angetriebene Walzen, von denen wenigstens eine Walze in Richtung auf die andere Walze beweglich gelagert ist,
  • b) einen über dem Walzenspalt angeordneten, zur Zuführung des Mahlgutes zum Walzenspalt dienenden Füllschacht, der zwei jeweils einer der Walzen zugeordnete Führungswände aufweist, die im unteren Bereich des Füllschachtes den dem Walzenspalt zugeführten Mahlgutstrom seitlich begrenzen, die zur Änderung der Breite dieses Mahlgutstromes relativ zur vertikalen Mittelebene der Gutbettwalzenmühle verstellbar sind und die sich parallel zu den Walzenachsen, sowie im wesentlichen über die gesannte axiale länge der Walzen erstrecken.
The invention relates to a material bed roller mill containing
  • a) two driven rollers arranged side by side to form a roller gap, pressed against one another with high grinding force, of which at least one roller is movably mounted in the direction of the other roller,
  • b) a filling shaft arranged above the roll nip and used to feed the regrind to the nip, which has two guide walls each assigned to one of the rolls, which laterally limit the flow of the regrind fed to the nip in the lower region of the roll nip and which change the width of this regrind flow relative to the vertical center plane of the material bed roller mill are adjustable and which extend parallel to the roller axes and substantially over the axial length of the rollers.

Aus der FR-A-345 743 ist ein Aufgabetrichter für gattungsfremde Eiform-Brikettpressen bekannt. Bei diesem Aufgabetrichter sind zwei sich mit Abstand gegenüberliegende bewegliche Schieber vorgesehen, die mit Hilfe von Zahnstangenantrieben gleichzeitig und parallel zueinander in ihrem Abstand verstellbar sind. Auf diese Weise soll die Durchflußmenge der - im allgemeinen weichen - Brikettmasse schnell geregelt werden können. Über die genauere Ausbildung der zugehörigen Eiform-Brikettpressen läßt sich dieser Veröffentlichung wenig entnehmen.From FR-A-345 743 a feed hopper for non-generic egg-shaped briquette presses is known. In this feed hopper, two movable slides are provided opposite one another, the spacing of which can be adjusted simultaneously and parallel to one another with the aid of rack and pinion drives. In this way, the flow rate of the - generally soft - briquette mass should be able to be regulated quickly. Little can be found in this publication about the more precise design of the associated egg-shaped briquette presses.

Eine Gutbettwalzenmühle der im Oberbegriff des Anspruches 1 vorausgesetzten Art ist beispielsweise aus der DE-A-35 35 406 bekannt. Hierbei sind in einer bestimmten Höhe oberhalb des Walzenspaltes sowie am unteren Ende eines Füllschachtes zwei sich gegenüberliegende, schieberartige Abdeckungen vorgesehen, die in ihrer Schräglage geradlinig gegeneinander verschoben werden können, um dadurch die Materialaufgabebreite und/oder die Höhe der auf den Walzen lastenden Materialsäule ändern zu können. Durch diese schieberartigen Abdeckungen erhält der Füllschacht an seinem unteren Ende eine Trichterform mit im Querschnitt veränderbarer Auslauföffnung.A material bed roller mill of the type required in the preamble of claim 1 is, for example, from DE-A-35 35 406 known. Here, at a certain height above the nip and at the lower end of a filling shaft, two opposing, slide-like covers are provided, which can be shifted in a straight line against each other in order to change the material feed width and / or the height of the material column on the rollers can. These slide-like covers give the filling shaft a funnel shape at its lower end with an outlet opening that can be changed in cross section.

Der Erfindung liegt die Aufgabe zugrunde, eine Gutbettwalzenmühle der im Oberbegriff des Anspruches 1 vorausgesetzten Art in der Weise zu verbessern, daß bei verhältnismäßig einfacher konstruktiver Gestaltung der sich durch die Mahlgutsäule über den Walzen einstellende Druck selbst bei schwankender Mahlgutzuführung möglichst weitgehend zur Gutbettzerkleinerung ausgenutzt werden kann.The invention has for its object to improve a material bed roller mill of the type required in the preamble of claim 1 in such a way that, with a relatively simple structural design, the pressure which is established by the mill column above the rollers can be used as much as possible for material bed comminution even with fluctuating supply of mill material .

Diese Aufgabe wird erfindungsgemäß dadurch gelöst, daß die Führungswände vertikal angeordnet und unter Beibehaltung ihrer vertikalen Lage quer zur vertikalen Mittelebene der Gutbettwalzenmühle sowie wahlweise auch einzeln und dadurch unabhängig voneinander verstellbar sind.This object is achieved in that the guide walls are arranged vertically and, while maintaining their vertical position transversely to the vertical central plane of the material bed roller mill, and optionally also individually and therefore independently of one another.

Zweckmäßige Ausgestaltungen der Erfindung sind Gegenstand der Unteransprüche.Appropriate embodiments of the invention are the subject of the dependent claims.

Bei dieser erfindungsgemäßen Gutbettwalzenmühle wird der dem Walzenspalt zugeführte Mahlgutstrom durch die verstellbaren, vertikalen Führungswände seitlich so eingegrenzt, daß sowohl bei kleineren als auch bei größeren Mahlgutmengen eine Mindesthöhe der sich bildenden Mahlgutsäule aufrechterhalten werden kann. Da die verstellbaren Führungswände auch bei einer Querverstellung ihre vertikale Lage beibehalten, kann der Mahlgutdruck, der sich durch die über den Walzen stehende Mahlgutsäule bildet, voll zur Gutbettzerkleinerung im Bereich des Walzenspaltes ausgenutzt werden.In this material bed roller mill according to the invention, the regrind flow fed to the nip is laterally so through the adjustable, vertical guide walls limited that a minimum height of the regrind column that is formed can be maintained both with smaller and with larger amounts of regrind. Since the adjustable guide walls retain their vertical position even with a transverse adjustment, the regrind pressure, which is formed by the regrind column above the rollers, can be fully utilized for comminution of the crop bed in the area of the roller gap.

Werden die beiden vertikalen Führungswände gemeinsam in Querrichtung verstellt, so ist die durch die Führungswände seitlich begrenzte Mahlgutsäule symmetrisch zur vertikalen Mittelebene der Gutbettwalzenmühle ausgerichtet. Dies ist im allgemeinen dann zweckmäßig, wenn aufgrund einer entsprechenden Zusammensetzung des Mahlgutes die Antriebsmotoren der beiden Mahlwalzen eine gleiche Leistungsaufnahme aufweisen.If the two vertical guide walls are adjusted jointly in the transverse direction, the regrind column laterally delimited by the guide walls is aligned symmetrically to the vertical center plane of the material bed roller mill. This is generally expedient if the drive motors of the two grinding rollers have the same power consumption due to a corresponding composition of the material to be ground.

Wenn dagegen das Mahlgut von unterschiedlicher Herkunft ist und/oder eine sehr unterschiedliche Körnung aufweist (wenn beispielsweise unzerkleinertes Frischgut und rückgeführte Grieße gemeinsam dem Füllschacht zugeführt werden), kann es vorkommen, daß die beiden Mahlwalzen bei symmetrischer Zuführung der Mahlgutsäule zum Walzenspalt unterschiedlich stark belastet werden, so daß die Antriebsmotoren der beiden Mahlwalzen eine unterschiedliche Leistungsaufnahme aufweisen. In diesem Falle kann dann die Mahlgutsäule beispielsweise durch Querverstellung nur einer Führungswand asymmetrisch zur vertikalen Mittelebene der Walzenmühle so eingestellt werden, daß die Leistungsaufnahme der Antriebsmotoren beider Walzen wieder ausgeglichen wird.If, on the other hand, the regrind is of different origin and / or has a very different grain size (if, for example, uncrushed fresh material and recycled semolina are fed together to the filling chute), it can happen that the two grinding rollers are loaded to different extents when the regrind column is fed symmetrically to the nip , so that the drive motors of the two grinding rollers have a different power consumption. In this case, the regrind column can then, for example, by transverse adjustment of only one guide wall asymmetrical to the vertical center plane of the roller mill be set so that the power consumption of the drive motors of both rollers is balanced again.

Die Erfindung sei nachfolgend anhand der Zeichnung häher erläutert. In dieser Zeichnung zeigen die Fig. 1, 2 und 3 jeweils ganz schematisch gehaltene, weitgehend gleichartige Querschnittsansichten durch eine erfindungsgemäße Gutbettwalzenmühle, wobei in diesen drei Zeichnungsfig. lediglich vertikale Führungswände des Füllschachtes jeweils unterschiedliche Stellungen einnehmen.The invention is explained in more detail below with reference to the drawing. In this drawing, FIGS. 1, 2 and 3 each show schematically held, largely similar cross-sectional views through a material bed roller mill according to the invention, in which three figures of the drawing. only vertical guide walls of the hopper each occupy different positions.

Der allgemeine Aufbau dieser Gutbettwalzenmühle sei zunächst anhand Fig. 1 erläutert, wobei jedoch alle Teile dieser Gutbettwalzenmühle in allen Zeichnungsfig. gleich sind, so daß sie alle mit denselben Bezugszeichen versehen sind.The general structure of this material bed roller mill is first explained with reference to FIG. 1, but all parts of this material bed roller mill in all the figures. are the same, so that they are all provided with the same reference numerals.

Die Gutbettwalzenmühle enthält zwei nebeneinander angeordnete, mit hoher Mahlkraft gegeneinander gepreßte Walzen 1, 2, von denen die Walze 1 als Festwalze und die Walze 2 als Loswalze ausgebildet ist. Die Loswalze 2 ist in Richtung des Doppelpfeiles 3 und somit in Richtung der Festwalze 1 beweglich gelagert, wie es an sich bekannt ist. Beide Walzen 1, 2 werden vorzugsweise durch je einen gesonderten - hier nicht näher veranschaulichten - Antriebsmotor gegeneinander laufend angetrieben.The material bed roller mill contains two rollers 1, 2 which are arranged next to one another and are pressed against one another with high grinding force, of which the roller 1 is designed as a fixed roller and the roller 2 as a loose roller. The loose roller 2 is movably mounted in the direction of the double arrow 3 and thus in the direction of the fixed roller 1, as is known per se. Both rollers 1, 2 are preferably driven against each other by a separate drive motor, which is not illustrated in detail here.

Zwischen den beiden Walzen 1, 2 ist ein Walzenspalt (Mahlspalt) 4 vorhanden, über dem ein Füllschacht 5 für Zuführung von Mahlgut zum Walzenspalt 4 angeordnet ist.Between the two rolls 1, 2 there is a roll gap (grinding gap) 4, above which a filling shaft 5 is arranged for feeding regrind to the roll gap 4.

Damit die lichte Breite B des vom Füllschacht 5 dem Walzenspalt 4 zugeführten Mahlgutstromes, also der dadurch gebildeten Mahlgutsäule 6, in jeweils gewünschter Weise geändert werden kann, sind im unteren Bereich des Füllschachtes 5 zwei sich mit Abstand gegenüberliegende vertikale Führungswände 7a und 7b unter Beibehaltung ihrer vertikalen Lage quer zur vertikalen Mittelebene 8 der Gutbettwalzenmühle verstellbar vorgesehen. Diese beiden vertikalen Führungswände 7a, 7b begrenzen damit den dem Walzenspalt 4 zuzuführenden Mahlgutstrom (Mahlgutsäule 6) in seitlicher Richtung, d. h. in Querrichtung zu den Walzenachsen 1a bzw. 2a.So that the clear width B of the regrind stream supplied from the filling chute 5 to the nip 4, that is to say the regrind column 6 formed thereby, can be changed as desired, in the lower region of the filling chute 5 there are two opposite one another vertical guide walls 7a and 7b are provided adjustable while maintaining their vertical position transverse to the vertical central plane 8 of the material bed roller mill. These two vertical guide walls 7a, 7b thus limit the regrind flow (regrind column 6) to be fed to the roll nip 4 in the lateral direction, ie in the transverse direction to the roll axes 1a and 2a.

Die beiden sich zu beiden Seiten der vertikalen Mittelebene 8 gegenüberliegenden vertikalen Führungswände 7a und 7b erstrecken sich parallel zu den Walzenachsen 1a, 2a sowie im wesentlichen über die ganze axiale Länge (senkrecht zur Zeichenebene der Fig. 1 - 3) der Walzen 1 und 2. Beide Führungswände 7a, 7b können in Querrichtung zur vertikalen Mittelebene 8, d. h. in Richtung der Doppelpfeile 9a, 9b je nach Bedarf und Ausführung gemeinsam oder auch einzeln und unabhängig voneinander verstellt werden. Auf diese Weise kann oberhalb des Walzenspaltes 4 bzw. oberhalb der beiden Walzen 1, 2 eine in bezug auf die vertikale Mittelebene 8 der Gutbettwalzenmühle mehr oder weniger breite symmetrische Mahlgutsäule 6 bzw. 6a (Fig. 1 und 2) oder asymmetrische Mahlgutsäule 6b (Fig. 3) gebildet und aufrechterhalten bzw. eingestellt werden, was im allgemeinen vor allem von der Leistungsaufnahme der beiden Antriebsmotoren für die Walzen 1 und 2 und damit von der jeweiligen Arbeitsbelastung dieser beiden Walzen 1, 2 abhängt. In jedem Falle wird die Mahlgutsäule 6, 6a, 6b stets von senkrecht verlaufenden Führungswänden 7a, 7b seitlich begrenzt, um dadurch den vollen Druck, der durch die über den Walzen 1, 2 stehende Mahlgutsäule entsteht, für die Gutbettzerkleinerung ausgenutzt. Die hierzu vor allem wirksam werdende Höhe H (Fig. 1) der über den Walzen 1, 2 bzw. dem Walzenspalt 4 lastenden Materialsäule 6, 6a bzw. 6b kann durch die Querverstellbarkeit (Pfeile 9a, 9b) der Führungswände 7a, 7b und somit durch die Einstellbarkeit der Breite B der Gutbettsäule auf ihrer günstigsten Höhe gehalten bzw. eingestellt werden.The two vertical guide walls 7a and 7b opposite each other on both sides of the vertical center plane 8 extend parallel to the roller axes 1a, 2a and essentially over the entire axial length (perpendicular to the plane of the drawing of FIGS. 1-3) of the rollers 1 and 2. Both guide walls 7a, 7b can be adjusted jointly or individually and independently of one another in the transverse direction to the vertical central plane 8, ie in the direction of the double arrows 9a, 9b, depending on requirements and design. In this way, a more or less wide symmetrical regrind column 6 or 6a (FIGS. 1 and 2) or asymmetrical regrind column 6b (FIG. 1) can be positioned above the nip 4 or above the two rollers 1, 2 with respect to the vertical center plane 8 of the material bed roller mill 3) are formed and maintained or adjusted, which generally depends primarily on the power consumption of the two drive motors for the rollers 1 and 2 and thus on the respective workload of these two rollers 1, 2. In any case, the millbase column 6, 6a, 6b is always laterally delimited by vertically running guide walls 7a, 7b, in order thereby to utilize the full pressure generated by the millbase column above the rollers 1, 2 for comminution of the material bed. The height H (FIG. 1) of the material column 6, 6a or 6b, which acts above the rolls 1, 2 or the roll nip 4, which becomes effective above all, can be adjusted by the transverse adjustability (arrows 9a, 9b) of the guide walls 7a, 7b and thus can be kept or adjusted at their most favorable height by the adjustability of the width B of the material bed column.

Dies bedeutet also, daß die seitliche Querverstellung der vertikalen Führungswände 7a, 7b eine Reduzierung der zuzuführenden Mahlgutmenge gestattet, ohne daß dadurch der Mahlgutdruck seitens der Mahlgutsäule in Richtung des Walzenspaltes 4 reduziert wird. Jede der beiden vertikalen Führungswände 7a, 7b ist direkt über einer zugehörigen Walze 1 bzw. 2 angeordnet. Hierbei weist die untere Längskante 7a' bzw. 7b' jeder Führungswand 7a bzw. 7b einen im wesentlichen gleichbleibenden minimalen Abstand a zur Außenumfangsseite 1b, 2b der zugehörigen Walze auf.This means that the lateral transverse adjustment of the vertical guide walls 7a, 7b allows a reduction in the quantity of regrind to be fed without the regrind pressure on the part of the regrind column being reduced in the direction of the nip 4. Each of the two vertical guide walls 7a, 7b is arranged directly above an associated roller 1 or 2. Here, the lower longitudinal edge 7a 'or 7b' of each guide wall 7a or 7b has a substantially constant minimum distance a from the outer circumferential side 1b, 2b of the associated roller.

Bei dem in der Zeichnung veranschaulichten Beispiel besitzt der Füllschacht 5 einen Schachtgrundkörper 10, der im unteren, vertikalen Schachtabschnitt 5a zwei sich mit Abstand auf beiden Seiten der vertikalen Mittelebene 8 gegenüberliegende, parallel zu den Walzenachsen 1a, 2a verlaufende, ortsfeste Schachtwände 11a, 11b aufweist, zwischen denen die beiden vertikalen Führungswände 7a, 7b querverstellbar (Pfeile 9a, 9b) angeordnet sind. Auch diese beiden ortsfesten Schachtwände 11a, 11b enden mit geringem Abstand (etwa Abstand a in Fig. 1) über der Außenumfangsseite 1b bzw. 2b der jeweils zugehörigen Walze 1 bzw. 2. Der Querabstand zwischen diesen beiden ortsfesten Schachtwänden 11a, 11b ist so groß bemessen, daß die zwischen ihnen quer beweglichen Führungswände 7a, 7b bis auf eine maximale Breite B der Mahlgutsäule (etwa Mahlgutsäule 6 in Fig. 1) verstellt werden können.In the example illustrated in the drawing, the filling chute 5 has a chute base body 10, which in the lower, vertical chute section 5a has two stationary chute walls 11a, 11b, which are spaced apart on both sides of the vertical central plane 8 and run parallel to the roller axes 1a, 2a , between which the two vertical guide walls 7a, 7b are arranged so as to be transverse (arrows 9a, 9b). These two stationary shaft walls 11a, 11b also end at a short distance (approximately distance a in FIG. 1) above the outer circumferential side 1b or 2b of the associated roller 1 or 2. The transverse distance between these two stationary shaft walls 11a, 11b is so great dimensioned such that the guide walls 7a, 7b, which can move transversely between them, can be adjusted to a maximum width B of the millbase column (approximately millbase column 6 in FIG. 1).

Der Schachtgrundkörper 10 weist ferner im Bereich der oberen Enden 7a'', 7b'' der vertikalen Führungswände 7a, 7b - im Querschnitt der Walzenmühle betrachtet (vgl. Darstellungen in Fig. 1 - 3) - eine trichterförmige Erweiterung auf, die im wesentlichen durch zwei vorzugsweise gleich große, symmetrisch zur vertikalen Mittelebene 8 nach unten geneigte (konvergierende) Schrägwände 12a und 12b gebildet wird. Diese beiden Schrägwände 12a, 12b schließen sich etwa an die oberen Enden der ortsfesten Schachtwände 11a, 11b an. Über der so gebildeten trichterförmigen Erweiterung kann der Schachtgrundkörper 10 noch einen behälterartigen oberen Teil 10' mit im wesentlichen geraden Seitenwänden nach Art eines Vorratsbehälters besitzen.The shaft base body 10 also has a funnel-shaped extension in the area of the upper ends 7a ″, 7b ″ of the vertical guide walls 7a, 7b — viewed in cross section of the roller mill (cf. representations in FIGS. 1-3), which essentially consists of two preferably equally large, symmetrical to the vertical center plane 8 downward (converging) inclined walls 12a and 12b is formed. These two inclined walls 12a, 12b connect approximately to the upper ends of the stationary shaft walls 11a, 11b. Above the funnel-shaped extension formed in this way, the manhole base body 10 can also have a container-like upper part 10 'with essentially straight side walls in the manner of a storage container.

Mit dem oberen Ende 7a'' bzw. 7b'' jeder vertikalen Führungswand 7a, 7b ist eine im wesentlichen ebene Schieberwand 13a bzw. 13b fest, vorzugsweise starr verbunden, die jeweils einer der Schrägwände 12a bzw. 12b des Schachtgrundkörpers 10 zugeordnet ist. Vorzugsweise ist jede dieser im wesentlichen ebenen Schieberwände 13a, 13b gleichartig geneigt wie die Schrägwände 12a, 12b und dabei ist jede Schieberwand 13a bzw. 13b in bzw. an der zugehörigen Schrägwand 12a bzw. 12b in Richtung der Doppelpfeile 14a, 14b gleichbeweglich geführt und einstellbar. Diese Einstellbarkeit in Richtung der Pfeile 14a, 14b der beiden Schieberwände 13a, 13b ist derart vorgesehen, daß dadurch gleichzeitig die mit diesen Schieberwänden 13a, 13b verbundenen vertikalen Führungswände 7a bzw. 7b in Richtung der Doppelpfeile 9a bzw. 9b quer zur vertikalen Mittelebene 8 verstellt werden können. Es versteht sich von selbst, daß jeder Schieberwand 13a, 13b eine geeignete, nicht näher veranschaulichte Verstellvorrichtung zugeordnet sein kann, die in an sich bekannter Weise für Schieber ausgeführt sein können, um die jeweils erforderlichen bzw. gewünschten Verstellmöglichkeiten der vertikalen Führungswände 7a, 7b (gemeinsam oder einzeln und unabhängig voneinander) gewährleisten zu können.With the upper end 7a ″ or 7b ″ of each vertical guide wall 7a, 7b, an essentially flat slide wall 13a or 13b is fixed, preferably rigidly connected, which is assigned to one of the inclined walls 12a or 12b of the shaft base body 10. Each of these essentially flat slide walls 13a, 13b is inclined in the same way as the inclined walls 12a, 12b, and each slide wall 13a or 13b is guided and adjustable in the same direction as the double arrows 14a, 14b in or on the associated inclined wall 12a or 12b . This adjustability in the direction of the arrows 14a, 14b of the two slide walls 13a, 13b is provided in such a way that the vertical guide walls 7a and 7b connected to these slide walls 13a, 13b are adjusted transversely to the vertical central plane 8 in the direction of the double arrows 9a and 9b can be. It goes without saying that each slide wall 13a, 13b can be assigned a suitable adjusting device, not illustrated in more detail, which can be designed for slides in a manner known per se in order to adjust the necessary or desired adjustment options of the vertical guide walls 7a, 7b ( jointly or individually and independently of each other).

Die erläuterten Schieberwände 13a, 13b haben den Vorteil, daß sie die Schrägwände 12a, 12b des Schachtgrundkörpers 10 in Richtung auf die vertikale Mittelebene 8 verlängern können (als zusätzliche Schräg-Trichterführung des zuzuführenden Mahlgutstromes).The slide walls 13a, 13b explained have the advantage that they can extend the inclined walls 12a, 12b of the shaft base body 10 in the direction of the vertical central plane 8 (as an additional inclined funnel guide for the material flow to be supplied).

Es versteht sich von selbst, daß im Bedarfsfalle an den unteren Endabschnitten der vertikalen Führungswände 7a, 7b noch geeignete zusätzliche Verstellmittel vorgesehen sein können, die insbesondere bei relativ großen Höhenabmessungen der vertikalen Führungswände 7a, 7b für die Beibehaltung der vertikalen Lage dieser Führungswände 7a, 7b auch in diesem unteren Abschnitt sorgen. Diese zusätzlichen Verstellmittel könnten dabei zweckmäßig mit den Verstellvorrichtungen für die Schieberwände 13a, 13b gekoppelt sein. Es versteht sich außerdem, daß auch andere geeignete Mittel zum Querverstellen der vertikalen Führungswände 7a, 7b vorgesehen werden können.It goes without saying that, if necessary, suitable additional adjustment means can also be provided on the lower end sections of the vertical guide walls 7a, 7b, which, in particular with relatively large height dimensions of the vertical guide walls 7a, 7b, for maintaining the vertical position of these guide walls 7a, 7b also worry in this lower section. These additional adjustment means could expediently be coupled to the adjustment devices for the slide walls 13a, 13b. It is also understood that other suitable means for transverse adjustment of the vertical guide walls 7a, 7b can also be provided.

Betrachtet man die Darstellungen in den Fig. 1, 2 und 3, dann lassen sich dort jeweils lediglich unterschiedliche Einstellagen der vertikalen Führungswände 7a und 7b erkennen. So zeigt Fig. 1 etwa die größte lichte Breite B der Mahlgutsäule 6 bei praktisch vollkommen nach außen verstellten vertikalen Führungswänden 7a und 7b. Gemäß Fig. 1 ergibt sich damit eine bezüglich der vertikalen Mittelebene 8 der Gutbettwalzenmühle bzw. der bezüglich des Walzenspaltes 4 symmetrische Mahlgutsäule 6 mit maximaler Breite B.If one looks at the representations in FIGS. 1, 2 and 3, then only different setting positions of the vertical guide walls 7a and 7b can be seen there in each case. For example, FIG. 1 shows the greatest clear width B of the ground material column 6 with the vertical guide walls 7a and 7b practically completely displaced outwards. 1, this results in a millbase column 6 with maximum width B that is symmetrical with respect to the vertical center plane 8 of the material bed roller mill or that is symmetrical with respect to the roller gap 4.

Gemäß Fig. 2 sind die beiden vertikalen Führungswände 7a und 7b um ein gleiches Maß gegen die vertikale Mittelebene 8 verstellt, so daß sich auch hier wiederum eine bezüglich der vertikalen Mittelebene 8 symmetrische Mahlgutsäule 6a, jedoch von relativ geringer Breite B₁ ergibt.2, the two vertical guide walls 7a and 7b are adjusted by an equal amount against the vertical center plane 8, so that here again a regrind column 6a symmetrical with respect to the vertical center plane 8, but of relatively small width B 1 results.

Nach der Darstellung in Fig. 3 ist lediglich die rechte vertikale Führungswand 7b nahezu vollkommen gegen die vertikale Mittelebene 8 der Gutbettwalzenmühle verstellt, während die linke vertikale Führungswand 7a in ihrer äußersten Lage nahe der Schachtwand 8a eingestellt bleibt (etwa wie in Fig. 1). Auf diese Weise ergibt sich eine bezüglich der vertikalen Mittelebene 8 und dem Walzenspalt 4 asymmetrische Einstellung der gebildeten Mahlgutsäule 6b mit entsprechender Breite B₂.As shown in Fig. 3, only the right vertical guide wall 7b is almost completely adjusted against the vertical central plane 8 of the material bed roller mill, while the left vertical guide wall 7a remains set in its outermost position near the shaft wall 8a (as in Fig. 1). This way a with respect to the vertical center plane 8 and the nip 4 asymmetrical adjustment of the ground column 6b formed with a corresponding width B₂.

Der Vergleich zwischen den Fig. 1, 2 und 3 läßt erkennen, daß beliebige Einstellungen und Ausrichtungen der dem Walzenspalt 4 zuzuführenden Mahlgutsäule möglich sind. Die asymmetrische Zuführung des Mahlgutstromes zum Walzenspalt 4 wird vor allem dann in entsprechend großem Ausmaß gewählt, wenn die Leistungsaufnahme des Antriebsmotors von der einen Walze höher ist als die der anderen Walze, so daß durch diese asymmetrische Einstellung der Mahlgutstrom stärker derart auf die Außenumfangsseite der einen Walze gelenkt werden kann, daß die Leistungsaufnahme der Antriebsmotoren für beide Walze gleich groß wird.The comparison between FIGS. 1, 2 and 3 reveals that any settings and orientations of the mill column to be fed to the roll nip 4 are possible. The asymmetrical supply of the regrind to the nip 4 is selected to a correspondingly large extent if the power consumption of the drive motor from one roller is higher than that of the other roller, so that this asymmetrical setting of the regrind stream is more pronounced on the outer circumferential side of the one Roller can be steered that the power consumption of the drive motors is the same for both rollers.

Schließlich sei noch erwähnt, daß der höchste Durchsatz dieser Gutbettwalzenmühle mit den stets vertikalen Führungswänden 7a, 7b des Füllschachtes 5 erreicht wird, wenn die lichte Schachtbreite B (und damit die Breite B der Mahlgutsäule) die Mahlguthöhe H und der Durchmesser der Walzen 1, 2 in einem geeigneten Verhältnis zueinander abgestimmt sind.Finally, it should be mentioned that the highest throughput of this material bed roller mill is achieved with the always vertical guide walls 7a, 7b of the filling shaft 5 when the clear shaft width B (and thus the width B of the column of ground material), the ground material height H and the diameter of the rollers 1, 2 are coordinated in a suitable relationship.

Der Vollständigkeit halber sei noch erwähnt, daß im Bereich der Stirnseiten des Füllschachtes 5, d. h. im Bereich der axialen Enden des Walzenpaares 1, 2, selbstverständlich in jeder geeigneten Weise ausgeführte und angebrachte, an sich bekannte Stirnwände vorgesehen sein können, die dort die Mahlgutsäule begrenzen.For the sake of completeness, it should also be mentioned that in the area of the end faces of the filling shaft 5, d. H. In the area of the axial ends of the pair of rollers 1, 2, of course, in any suitable manner, implemented and attached, known end walls can be provided, which limit the millbase column there.

Claims (4)

  1. Material bed roll mill, containing
    a) two driven rolls (1, 2) which are are arranged adjacent to one another and pressed against one another with a high grinding force, forming a roll gap (4), at least one of these rolls being mounted so as to be movable in the direction of the other roll,
    b) a filling shaft (5) arranged above the roll gap (4) for delivery of the material for grinding to the roll gap, and having two guide walls (7a, 7b) which are each associated with one of the rolls and which in the lower region of the filling shaft (5) laterally define the stream of material (6, 6a, 6b) for grinding which is delivered to the roll gap (4), are adjustable relative to the vertical central plane (8) of the material bed roll mill for altering the width of this stream of material for grinding, and extend parallel to the roll axes as well as extending substantially over the entire axial length of the rolls,
    characterised in that the guide walls (7a, 7b) are arranged vertically and whilst maintaining their vertical position they can be adjusted at right angles to the vertical central plane (8) of the material bed roll mill and also adjusted individually as required and thus independently of one another.
  2. Material bed roll mill as claimed in claim 1, characterised in that the lower long edge (7a', 7b') of each vertical guide wall (7a, 7b) is a substantially constant small distance (a) from the outer peripheral side (1b, 2b) of the appertaining roll (1, 2).
  3. Material bed roll mill as claimed in claim 1, characterised in that the filling shaft (5) has a main shaft body (10) with two stationary shaft walls (11a, 11b) which lie opposite one another and run parallel to the roll axes (1a, 2a), the two guide walls (7a, 7b) being arranged so as to be adjustable in the cross direction between these shaft walls (11a, 11b).
  4. Material bed roll mill as claimed in claim 3, characterised in that the main shaft body (10) has in the region of the upper ends (7a'', 7b'') of the vertical guide walls (7a, 7b) - viewed in cross-section of the roll mill - a funnel-shaped wider portion with two inclined walls (12a, 12b) which are preferably of equal size and are inclined downwards symmetrically with respect to the vertical central plane (8), and in each of these inclined walls (12a, 12b) a substantially flat sliding wall (13a, 13b) which is similarly inclined is guided so as to be slidably movable, each of the said inclined walls being connected to the upper end (7a'', 7b'') of one of the vertical guide walls (7a, 7b), so that a sliding movement of the sliding walls adjusts these guide walls in the cross direction (9a, 9b).
EP90103272A 1989-03-10 1990-02-20 Material bed roller mill Expired - Lifetime EP0386520B1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AT90103272T ATE93165T1 (en) 1989-03-10 1990-02-20 GOOD BED ROLLER MILL.

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE3907830A DE3907830A1 (en) 1989-03-10 1989-03-10 GOOD BED ROLLING MILL
DE3907830 1989-03-10

Publications (3)

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EP0386520A2 EP0386520A2 (en) 1990-09-12
EP0386520A3 EP0386520A3 (en) 1991-05-29
EP0386520B1 true EP0386520B1 (en) 1993-08-18

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US (1) US5096131A (en)
EP (1) EP0386520B1 (en)
AT (1) ATE93165T1 (en)
BR (1) BR9001130A (en)
DE (2) DE3907830A1 (en)
ES (1) ES2044265T3 (en)
ZA (1) ZA901230B (en)

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DE4228058C2 (en) * 1992-08-24 1995-04-20 Kloeckner Humboldt Deutz Ag Plant and method for pressure treatment of granular goods
DE10233811B4 (en) * 2002-07-25 2013-05-29 Khd Humboldt Wedag Gmbh Two-roll machine for the pressure treatment of granular material
DE102005045591A1 (en) * 2005-09-23 2007-03-29 Polysius Ag 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
DK176687B1 (en) * 2007-07-10 2009-02-23 Smidth As F L Rolling press for grinding particulate material
US9067213B2 (en) * 2008-07-02 2015-06-30 Buhler Ag Method for producing flour and/or semolina
AU2009268180B2 (en) * 2008-07-09 2014-04-10 Khd Humboldt Wedag Gmbh Feed device with two rotary valves which are variable independently of each other
RU2014105512A (en) * 2011-07-14 2015-08-20 Зе Юниверсити оф Мельбурн IMPROVEMENT OF METHODS OF COMPRESSION OF MATERIALS AND / OR REMOVAL OF THEIR MOISTURE
EP2666543B1 (en) * 2012-05-23 2020-04-08 Sandvik Intellectual Property AB Vertical shaft impact crusher feed tube
DE102013022206B4 (en) 2013-12-17 2015-07-30 Khd Humboldt Wedag Gmbh Material flow flap for feeding device of a roller press
ES2732372T3 (en) 2014-12-10 2019-11-22 Smidth As F L An apparatus for grinding particulate material
EP3365135B1 (en) 2015-10-19 2023-06-21 Cold Jet, LLC Blast media comminutor
JP7524715B2 (en) * 2020-10-29 2024-07-30 セイコーエプソン株式会社 Crushing Equipment
CN113117807B (en) * 2021-04-20 2022-06-24 长沙星成物流有限公司 Comprehensive environment-friendly treatment process for non-ferrous metal smelting waste residues

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FR345743A (en) * 1904-08-20 1904-12-09 De La Buire Quick adjustment dispensing hopper for ball presses
DE1070903B (en) * 1958-03-24 1959-12-10
US3174696A (en) * 1962-05-11 1965-03-23 Deere & Co Roller mill
DE3407534C2 (en) * 1984-03-01 1987-01-02 Klöckner-Humboldt-Deutz AG, 5000 Köln Roller mill for pressure comminution of brittle material
DE3535406A1 (en) * 1985-10-03 1987-04-09 Krupp Polysius Ag Method and system for comminuting material for grinding

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US5096131A (en) 1992-03-17
EP0386520A2 (en) 1990-09-12
ATE93165T1 (en) 1993-09-15
ES2044265T3 (en) 1994-01-01
BR9001130A (en) 1991-03-05
DE59002354D1 (en) 1993-09-23
EP0386520A3 (en) 1991-05-29
ZA901230B (en) 1990-11-28
DE3907830A1 (en) 1990-09-13

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