EP0425630B1 - Grinding equipment for a wide angle conical refiner - Google Patents

Grinding equipment for a wide angle conical refiner Download PDF

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Publication number
EP0425630B1
EP0425630B1 EP90907039A EP90907039A EP0425630B1 EP 0425630 B1 EP0425630 B1 EP 0425630B1 EP 90907039 A EP90907039 A EP 90907039A EP 90907039 A EP90907039 A EP 90907039A EP 0425630 B1 EP0425630 B1 EP 0425630B1
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Prior art keywords
zone
blades
prebeating
equipment according
ridge
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German (de)
French (fr)
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EP0425630A1 (en
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John Mladota
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Bematec SA
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Bematec SA
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    • D—TEXTILES; PAPER
    • D21—PAPER-MAKING; PRODUCTION OF CELLULOSE
    • D21D—TREATMENT OF THE MATERIALS BEFORE PASSING TO THE PAPER-MAKING MACHINE
    • D21D1/00—Methods of beating or refining; Beaters of the Hollander type
    • D21D1/20—Methods of refining
    • D21D1/22—Jordans

Definitions

  • the knives are in the rotating as well as in the stationary part over the entire grinding surface, i.e. from entry to exit, made of the same material and - at least approximately - with the same arrangement.
  • US-A-26 94 344 shows a marked steep cone refiner with an inlet pre-grinding zone and a main grinding zone.
  • bar-shaped knives are welded or cast on, in the stationary part parallel to the cone surface lines or at an angle to them, and in the rotating part with a kink both at an angle to the cone surface lines and parallel to them.
  • the knives are attached in the main grinding zone, in the stationary part herringbone-like with the resulting longitudinal axes of the knives approximately parallel to the cone surface lines, and incised in the rotating part parallel to the cone surface lines.
  • the paper stock is conveyed into the refiner set in the form of a fiber suspension of, for example, 5 percent by weight of fibers dissolved in 95 percent by weight of water and processed between the knife edges and knife surfaces.
  • the knives In the entry area into the set, the knives must be robust and arranged with relatively large gaps. Only with such an open inlet is the risk of the blockage clogged with certainty.
  • the invention has for its object to provide a grinding set of the type described above, in particular with regard to the refiner dimensioning, which is largely independent of the inlet parameters.
  • the considerably finer knife structure in the fine grinding zones compared to the pre-grinding zone leads on the one hand to a relatively gentle treatment of the material to be ground in the fine grinding zone and on the other hand to a high secondary cutting edge length, as a result of which the grinding performance is considerably higher.
  • the stationary part advantageously has an inner conical ring-shaped pre-grinding zone and one or more downstream fine grinding zones, in which the design and arrangement of the web-shaped knives in the pre-grinding zone and the web-shaped knives or corresponding edge-shaped structures in the fine grinding zones differ significantly from one another.
  • the design and arrangement of the bar-shaped knives largely depends on the material to be ground.
  • the proportion of area of the web-shaped knives of the stationary part in the pre-grinding zone is advantageously at most 25 to 30% and in the fine grinding zone approximately 50%, the depth of the channels between the web-shaped knives in the pre-grinding zone expediently being substantially greater than the depth of the channels between the web-shaped knives is in the fine grinding zone, for example in the pre-grinding zone about 20 mm and in the fine grinding zone is about 12 mm.
  • the mean knife angle to the cone surface lines in the pre-grinding zone is advantageously approximately 12 ° and in the fine grinding zone approximately 30 °.
  • the stationary part is expedient as a cast part in the Pre-grinding zone welded or cast on steel knives and hard grinding segments used in the fine grinding zone.
  • the pre-grinding zone is designed with relatively soft and cheap knives, while the fine grinding zone is designed with relatively hard, high-quality knives.
  • the rotating part advantageously has a continuous grinding zone.
  • the proportion of the area of the bar-shaped knives of the rotating part in the grinding zone is expediently about 40%, the depth of the channels between the bar-shaped knives of the rotating part is about 20 mm.
  • the average knife angle of the knives of the rotating part to the conical surface lines in the region of the pre-grinding zone of the stationary part is advantageously approximately 8 ° and in the region of the fine grinding zone of the stationary part approximately 10 °.
  • the rotating part is also expediently designed as a casting with welded-on steel knives.
  • rotating part has an inner cone-shaped pre-grinding zone and one or more downstream fine grinding zones, in which the design and arrangement of the web-shaped knives in the pre-grinding zone and the web-shaped knives or corresponding edge-shaped structures in the fine grinding zones differ significantly from one another.
  • the design and arrangement of the web-shaped knives of the rotating part in the pre-grinding zone suitably corresponds to that of a rotating part with a continuous grinding zone as described above.
  • the rotating part with pre-grinding zone and fine grinding zone is also advantageously designed as a casting with steel knives welded or cast on in the pre-grinding zone and hard grinding segments used in the fine grinding zone.
  • the average angle between the knives of the stationary and rotating part is expediently approximately 20 ° in the pre-grinding zone and approximately 40 ° in the fine grinding zone.
  • the cone opening angle is preferably approximately 60 °.
  • the grinding set according to the invention of a cone refiner consists, as shown in the drawings, of a stationary part 1 designed as a hollow truncated cone and a driven rotating part 2 arranged therein, designed as a truncated cone.
  • the stationary part shown schematically in FIGS. 1 and 2 has an inner conical pre-grinding zone 3 and an outer conical fine grinding zone 4.
  • web-shaped knives 5 arranged parallel to one another are provided in cone ring segments.
  • the knives 5 are preferably steel knives and welded onto a casting 6.
  • the area of the web-shaped knives in the pre-grinding zone 3 is at most 25 to 30%, so that 70 to 75% of the area remains for the open area between the knives 5.
  • One knife 5 per cone ring segment is guided all the way in.
  • the depth of the channels between the web-shaped knives 5 in the pre-grinding zone 3 is preferably approximately 20 mm.
  • the mean knife angle of the knives 5 to the cone surface lines in the pre-grinding zone 3 is approximately 12 °.
  • the fine grinding zone 4 adjoining the pre-grinding zone 3 of the stationary part 1 likewise has web-shaped knives 7 arranged parallel to one another. These knives 7 are preferably formed on hard, high-quality grinding segments used in the fine grinding zone 4. The area proportion of the knives 7 in the fine grinding zone 4 is approximately 50%.
  • the depth of the channels between the web-shaped knives 7 of the fine grinding zone 4 is approximately 12 mm.
  • the mean knife angle of the knives 7 to the cone surface lines in the fine grinding zone 4 is approximately 30 °.
  • the relatively small knife angle in the pre-grinding zone 3 means that here the material is cut up more and lumps are opened.
  • the relatively larger knife angle in the fine grinding zone 4 leads to the fact that Regrind is grated more and treated more gently.
  • the greatest pressing pressure when the rotating part 2 is inserted in the stationary part 1 occurs in the area of the relatively soft pre-grinding zone 3.
  • one or more further fine grinding zones (not shown) with a further different design and arrangement of the corresponding web-shaped knives can additionally be provided.
  • the rotating part 2 has a single continuous grinding zone 8.
  • web-shaped knives 9 arranged parallel to one another are provided on cone ring segments. These knives 9 are preferably designed as steel knives welded onto a cast part 10.
  • the area of the bar-shaped knives 9 in the grinding zone 8 of the rotating part 2 is approximately 40%, so that an open area of approximately 60% remains.
  • the depth of the channels between the web-shaped knives 9 of the rotating part 2 is preferably approximately 20 mm.
  • the average knife angle of the knives 9 of the rotating part 2 to the conical surface lines is approximately 8 ° in the area of the pre-grinding zone 3 of the stationary part and approximately 10 ° in the area of the fine grinding zone 4 of the stationary part. The reason that the mean knife angle in the range the fine grinding zone 4 of the stationary part 1 is somewhat larger, that several additional small knives 9 are provided on the outside.
  • an average angle between the knives 5 of the stationary part 1 in the pre-grinding zone 3 and the knives 9 of the rotating part 2 is approximately 20 °, while the average angle between the knives 7 of the stationary part Part 1 in the fine grinding zone 4 and the knives 9 of the rotating part 2 is approximately 40 °.
  • FIGS. 5 and 6 Another embodiment of the rotating part 2 of a grinding set according to the invention is shown schematically in FIGS. 5 and 6.
  • the frustoconical rotating part 2 has an inner cone-shaped pre-grinding zone 11 and an outer cone-shaped fine grinding zone 12, in which the design and arrangement of web-shaped knives 13 in the pre-grinding zone 11 and web-shaped knives 14 in the fine grinding zone 12 differ from one another.
  • the knives 13 of the pre-grinding zone 11 of the rotating part 2 are again arranged parallel to one another in conical ring segments.
  • the knives 13 of the pre-grinding zone 11 of the rotating part 2 are preferably designed as steel knives welded onto a cast part 15.
  • the design and arrangement of the bar-shaped knives 13 in the pre-grinding zone 11 of the rotating part 2 corresponds to the design and arrangement of the bar-shaped knives 9 in the single grinding zone 8 of the rotating part 2 as described in connection with FIGS. 3 and 4.
  • the web-shaped knives 14 of the fine grinding zone 12 of the rotating part 2 are here also preferably formed on hard grinding segments used in the fine grinding zone 12 of the rotating part 2.
  • the cone opening angle of the stationary part 1 and rotating part 2 is approximately 60 °.

Landscapes

  • Crushing And Grinding (AREA)
  • Paper (AREA)
  • Finish Polishing, Edge Sharpening, And Grinding By Specific Grinding Devices (AREA)
  • Disintegrating Or Milling (AREA)
  • Polishing Bodies And Polishing Tools (AREA)

Abstract

PCT No. PCT/EP90/00811 Sec. 371 Date Mar. 18, 1991 Sec. 102(e) Date Mar. 18, 1991 PCT Filed May 18, 1990 PCT Pub. No. WO90/14464 PCT Pub. Date Nov. 29, 1990.Grinding equipment for a Jordan refiner for grinding paper pulp having a rotating part in form of a truncated cone and a stationary part in the form of a hollow truncated cone, on which bar-shaped knives are arranged at predetermined angles with respect to the conical shell generating lines. To improve the grinding equipment of the refiner, a pre-grinding zone is arranged upstream of one or more fine grinding zones whose configuration and arrangement are adapted to the state and desired development of the fibers in the grinding stock flowing through the grinding equipment.

Description

Die Erfindung bezieht sich auf eine Mahlgarnitur eines Kegelrefiners zum Mahlen von Papierstoffen

  • mit einem als Kegelstumpf ausgebildeten rotierenden Teil, auf dessen Außenmantelfläche stegförmige Messer unter vorgegebenen Winkeln zu den Kegelmantellinien aufgebracht sind, und
  • mit einem als Hohlkegelstumpf ausgebildeten stationären Teil, auf dessen Innenmantelfläche stegförmige Messer unter vorgegebenen Winkeln zu den Kegelmantellinien eingebracht sind.
The invention relates to a grinding set of a cone refiner for grinding paper materials
  • with a rotating part designed as a truncated cone, on the outer lateral surface of which web-shaped knives are applied at predetermined angles to the conical surface lines, and
  • with a stationary part designed as a hollow truncated cone, on the inner lateral surface of which web-shaped knives are introduced at predetermined angles to the conical surface lines.

Bei bekannten Ausführungen derartiger Kegelrefinergarnituren sind die Messer sowohl beim rotierenden wie auch beim stationären Teil über die gesamte Mahlfläche, d.h. vom Eintritt bis zum Austritt, aus dem gleichen Werkstoff und - wenigstens annähernd - mit gleicher Anordnung ausgebildet.In known designs of such cone refiner sets, the knives are in the rotating as well as in the stationary part over the entire grinding surface, i.e. from entry to exit, made of the same material and - at least approximately - with the same arrangement.

Durch die US-A-27 76 800 ist ein Scheibenrefiner mit zusätzlicher Saugkammer und Luftflügeln bekannt geworden, bei dem zwar mehrere Mahlzonen vorgesehen sind, die Messer in der Vormahlzone jedoch keine Winkel zu den Radien aufweisen und die Messer in den weiteren Zonen aufeinanderfolgend keinen Winkel zu den Radien aufweisen und unter unterschiedlichen positiven und negativen Winkeln zu den Radien angeordnet sind.From US-A-27 76 800 a disc refiner with an additional suction chamber and air wings has become known, in which several grinding zones are provided, but the knives in the pre-grinding zone have no angles to the radii and the knives in the further zones successively no angles have to the radii and are arranged at different positive and negative angles to the radii.

Die US-A-26 94 344 zeigt einen ausgesprochenen Steilkegelrefiner mit einer Einlaßvormahlzone und einer Hauptmahlzone. Dort sind in der Einlaßvormahlzone stegförmige Messer aufgeschweißt oder angegossen, und zwar im stationären Teil parallel zu den Kegelmantellinien oder unter einem Winkel zu diesen, und im rotierenden Teil mit Knick sowohl unter einem Winkel zu den Kegelmantellinien als auch parallel zu diesen. In der Hauptmahlzone sind die Messer angefügt, und zwar im stationären Teil fischgrätartig mit den resultierenden Messerlängsachsen etwa parallel zu den Kegelmantellinien, und im rotierenden Teil eingeschnitten parallel zu den Kegelmantellinien.US-A-26 94 344 shows a marked steep cone refiner with an inlet pre-grinding zone and a main grinding zone. There, in the inlet pre-grinding zone, bar-shaped knives are welded or cast on, in the stationary part parallel to the cone surface lines or at an angle to them, and in the rotating part with a kink both at an angle to the cone surface lines and parallel to them. The knives are attached in the main grinding zone, in the stationary part herringbone-like with the resulting longitudinal axes of the knives approximately parallel to the cone surface lines, and incised in the rotating part parallel to the cone surface lines.

Der Papierstoff wird in Form einer Fasersuspension von beispielsweise 5 Gewichtsprozent Fasern aufgelöst in 95 Gewichtsprozent Wasser mittels einer Pumpe in die Refinergarnitur gefördert und zwischen den Messerkanten und Messeroberflächen verarbeitet. Im Eintrittsbereich in die Garnitur müssen die Messer robust ausgebildet und mit relativ weiten Zwischenräumen angeordnet sein. Nur mit einem solchen offenen Einlaß wird die Gefahr des Verstopfens der Garnitur mit Sicherheit verhindert.The paper stock is conveyed into the refiner set in the form of a fiber suspension of, for example, 5 percent by weight of fibers dissolved in 95 percent by weight of water and processed between the knife edges and knife surfaces. In the entry area into the set, the knives must be robust and arranged with relatively large gaps. Only with such an open inlet is the risk of the blockage clogged with certainty.

Die weiten Abstände zwischen den Messern haben aber als Folge, daß die sekundliche Schnittkantenlänge der Garnitur geringe Werte erreicht, wodurch der erzielbare Mahleffekt in unerwünschter Weise eingeschränkt ist. In den bisherigen Ausführungen der kegelförmigen Garnituren haben die für diese Einlaßzone erforderlichen Parameter weitgehend die Ausbildung der ganzen übrigen Mahlfäche bestimmt.The wide distances between the knives have the consequence, however, that the secondary cut edge length of the set reaches low values, which undesirably limits the grinding effect that can be achieved. In the previous versions of the conical fittings, the parameters required for this inlet zone largely determined the design of the entire remaining grinding surface.

Der Erfindung liegt die Aufgabe zugrunde, eine Mahlgarnitur der eingangs beschriebenen Art, insbesondere bezüglich der Refinerbemesserung, zu schaffen, die von den Einlaßparametern weitgehend unabhängig ist.The invention has for its object to provide a grinding set of the type described above, in particular with regard to the refiner dimensioning, which is largely independent of the inlet parameters.

Diese Aufgabe wird erfindungsgemäß dadurch gelöst,

  • daß einer Vormahlzone eine oder mehrere Feinmahlzonen nachgeschaltet sind, deren Ausbildung und Anordnung dem jeweiligen Faserzustand und der jeweiligen gewünschten Faserentwicklung des durch die Mahlgarnitur strömenden Mahlguts angepaßt sind,
  • daß die stegförmigen Messer in den jeweiligen Zonen in planer Abwicklung geradlinig verlaufen,
  • und daß zumindest im stationären Teil die mittleren Messerwinkel zu den Kegelmantellinien in der Vormahlzone wenigstens etwa 10° und in der Feinmahlzone wenigstens etwa 20° betragen.
According to the invention, this object is achieved by
  • that a pre-grinding zone is followed by one or more fine grinding zones, the design and arrangement of which are adapted to the respective fiber condition and the respective desired fiber development of the ground material flowing through the grinding set,
  • that the web-shaped knives run in a straight line in the respective zones,
  • and that, at least in the stationary part, the mean knife angles to the cone surface lines in the pre-grinding zone are at least about 10 ° and in the fine grinding zone at least about 20 °.

Damit kann die Übertragung der Mahlenergie auf die Fasern genauestens gesteuert werden durch eine praktisch unbeschränkte Variationsmöglichkeit der Konfigurationen.This means that the transmission of the grinding energy to the fibers can be precisely controlled by means of a practically unlimited possibility to vary the configurations.

Die Feinmahlzonen unterscheiden sich wesentlich von der Vormahlzone, und zwar sowohl hinsichtlich der Geometrie - Breite der Messer, Breite und Tiefe der Kanäle zwischen den Messern,

  • als auch hinsichtlich der verwendeten Messerwerkstoffe.
The fine grinding zones differ significantly from the pre-grinding zone, both with regard to the geometry - width of the knives, width and depth of the channels between the knives,
  • as well as with regard to the knife materials used.

Die gegenüber der Vormahlzone erheblich feinere Messerstruktur in den Feinmahlzonen führt einerseits zu einer relativ schonenden Behandlung des Mahlgutes in der Feinmahlzone und andererseits zu einer hohen sekundlichen Schnittkantenlänge, wodurch die Mahlleistung erheblich höher wird.The considerably finer knife structure in the fine grinding zones compared to the pre-grinding zone leads on the one hand to a relatively gentle treatment of the material to be ground in the fine grinding zone and on the other hand to a high secondary cutting edge length, as a result of which the grinding performance is considerably higher.

Vorteilhaft weist der stationäre Teil eine innere kegelringförmige Vormahlzone und eine oder mehrere nachgeschaltete Feinmahlzonen auf, in denen sich die Ausbildung und Anordnung der stegförmigen Messer in der Vormahlzone und der stegförmigen Messer oder entsprechender kantenförmiger Gebilde in den Feinmahlzonen wesentlich voneinander unterscheiden.The stationary part advantageously has an inner conical ring-shaped pre-grinding zone and one or more downstream fine grinding zones, in which the design and arrangement of the web-shaped knives in the pre-grinding zone and the web-shaped knives or corresponding edge-shaped structures in the fine grinding zones differ significantly from one another.

Die Ausbildung und Anordnung der stegförmigen Messer ist weitgehend abhängig von dem zu mahlenden Material. Vorteilhaft beträgt der Flächenanteil der stegförmigen Messer des stationären Teils in der Vormahlzone höchstens 25 bis 30% und in der Feinmahlzone etwa 50%, wobei die Tiefe der Kanäle zwischen den stegförmigen Messern in der Vormahlzone zweckmäßig wesentlich größer als die Tiefe der Kanäle zwischen den stegförmigen Messern in der Feinmahlzone ist, beispielsweise in der Vormahlzone etwa 20 mm und in der Feinmahlzone etwa 12 mm beträgt.The design and arrangement of the bar-shaped knives largely depends on the material to be ground. The proportion of area of the web-shaped knives of the stationary part in the pre-grinding zone is advantageously at most 25 to 30% and in the fine grinding zone approximately 50%, the depth of the channels between the web-shaped knives in the pre-grinding zone expediently being substantially greater than the depth of the channels between the web-shaped knives is in the fine grinding zone, for example in the pre-grinding zone about 20 mm and in the fine grinding zone is about 12 mm.

Vorteilhaft beträgt im stationären Teil der mittlere Messerwinkel zu den Kegelmantellinien in der Vormahlzone etwa 12° und in der Feinmahlzone etwa 30°.In the stationary part, the mean knife angle to the cone surface lines in the pre-grinding zone is advantageously approximately 12 ° and in the fine grinding zone approximately 30 °.

Zweckmäßig ist der stationäre Teil als Gußteil mit in der Vormahlzone aufgeschweißten oder angegoßenen Stahlmessern und in der Feinmahlzone eingesetzten harten Mahlsegmenten ausgebildet. Die Vormahlzone ist dabei mit relativ weichen und billigen Messern, die Feinmahlzone dagegen mit relativ harten, qualitativ hochwertigen Messern ausgebildet.The stationary part is expedient as a cast part in the Pre-grinding zone welded or cast on steel knives and hard grinding segments used in the fine grinding zone. The pre-grinding zone is designed with relatively soft and cheap knives, while the fine grinding zone is designed with relatively hard, high-quality knives.

Vorteilhaft weist der rotierende Teil eine durchgehende Mahlzone auf.The rotating part advantageously has a continuous grinding zone.

Der Flächenanteil der stegförmigen Messer des rotierenden Teils in der Mahlzone beträgt zweckmäßig etwa 40%, die Tiefe der Kanäle zwischen den stegförmigen Messern des rotierenden Teils etwa 20 mm.The proportion of the area of the bar-shaped knives of the rotating part in the grinding zone is expediently about 40%, the depth of the channels between the bar-shaped knives of the rotating part is about 20 mm.

Vorteilhaft beträgt der mittlere Messerwinkel der Messer des rotierenden Teils zu den Kegekmantellinien im Bereich der Vormahlzone des stationären Teils etwa 8° und im Bereich der Feinmahlzone des stationären Teils etwa 10°.The average knife angle of the knives of the rotating part to the conical surface lines in the region of the pre-grinding zone of the stationary part is advantageously approximately 8 ° and in the region of the fine grinding zone of the stationary part approximately 10 °.

Damit ergibt sich mit den entsprechenden, oben erwähnten Messerwinkeln der Messer des stationären Teils in der Vormahlzone der Mahlgarnitur ein mittlerer Schnittwinkel zwischen den Messern des stationären und des rotierenden Teils von etwa 20° und in der Feinmahlzone von etwa 40°. Der kleinere Schnittwinkel bewirkt mehr Zerschneiden, der größere Schnittwinkel mehr Reiben des Mahlgutes.With the corresponding knife angles of the knives of the stationary part in the pre-grinding zone of the grinding set, this results in an average cutting angle between the knives of the stationary and the rotating part of approximately 20 ° and in the fine grinding zone of approximately 40 °. The smaller cutting angle causes more cutting, the larger cutting angle more rubbing of the ground material.

Auch der rotierende Teil ist zweckmäßig als Gußteil mit aufgeschweißten Stahlmessern ausgebildet.The rotating part is also expediently designed as a casting with welded-on steel knives.

Eine Weiterbildung der Erfindung besteht darin, daß der rotierende Teil eine innere kegelringförmige Vormahlzone und eine oder mehrere nachgeschaltete Feinmahlzonen aufweist, in denen sich die Ausbildung und Anordnung der stegförmigen Messer in der Vormahlzone und der stegförmigen Messer oder entsprechender kantenförmiger Gebilde in den Feinmahlzonen wesentlich voneinander unterscheiden.A further development of the invention is that rotating part has an inner cone-shaped pre-grinding zone and one or more downstream fine grinding zones, in which the design and arrangement of the web-shaped knives in the pre-grinding zone and the web-shaped knives or corresponding edge-shaped structures in the fine grinding zones differ significantly from one another.

Mit einer solchen Ausbildung läßt sich eine weitere Steigerung der Mahlleistung erreichen.With such training, a further increase in grinding performance can be achieved.

Die Ausbildung und Anordnung der stegförmigen Messer des rotierenden Teils in der Vormahlzone entspricht zweckmäßig denen eines rotierenden Teils mit einer durchgehenden Mahlzone wie vorstehend beschrieben.The design and arrangement of the web-shaped knives of the rotating part in the pre-grinding zone suitably corresponds to that of a rotating part with a continuous grinding zone as described above.

Vorteilhaft ist auch der rotierende Teil mit Vormahlzone und Feinmahlzone als Gußteil mit in der Vormahlzone aufgeschweißten oder angegossenen Stahlmessern und in der Feinmahlzone eingesetzten harten Mahlsegmenten ausgebildet.The rotating part with pre-grinding zone and fine grinding zone is also advantageously designed as a casting with steel knives welded or cast on in the pre-grinding zone and hard grinding segments used in the fine grinding zone.

Allgemein beträgt der mittlere Winkel zwischen den Messern des stationären und rotierenden Teils zweckmäßig in der Vormahlzone etwa 20° und in der Feinmahlzone etwa 40°.In general, the average angle between the knives of the stationary and rotating part is expediently approximately 20 ° in the pre-grinding zone and approximately 40 ° in the fine grinding zone.

Der Kegelöffnungswinkel beträgt vorzugsweise etwa 60°.The cone opening angle is preferably approximately 60 °.

Die Erfindung ist im folgenden an Ausführungsbeispielen und anhand der Zeichnungen näher erläutert. In den Zeichnungen zeigen

Fig. 1
eine Stirnansicht eines stationären Teils mit Vor- und Feinmahlzone einer Mahlgarnitur gemäß der Erfindung,
Fig. 2
eine Mantelschnittansicht des stationären Teils längs der Linie II-II in Fig. 1,
Fig. 3
eine Teilstirnansicht eines rotierenden Teils mit einer Mahlzone einer Mahlgarnitur gemäß der Erfindung,
Fig. 4
eine Schnittansicht des rotierenden Teils längs der Linie IV-IV in Fig. 3,
Fig. 5
eine Teilstirnansicht eines rotierenden Teils mit Vor- und Feinmahlzone einer Mahlgarnitur gemäß der Erfindung, und
Fig. 6
eine Schnittansicht des rotierenden Teils längs der Linie VI-VI in Fig. 5.
The invention is explained below using exemplary embodiments and with reference to the drawings. Show in the drawings
Fig. 1
1 shows an end view of a stationary part with a pre-grinding and fine grinding zone of a grinding set according to the invention,
Fig. 2
FIG. 2 shows a sectional sectional view of the stationary part along the line II-II in FIG. 1,
Fig. 3
2 shows a partial front view of a rotating part with a grinding zone of a grinding set according to the invention,
Fig. 4
3 shows a sectional view of the rotating part along the line IV-IV in FIG. 3,
Fig. 5
a partial front view of a rotating part with pre-and fine grinding zone of a grinding set according to the invention, and
Fig. 6
a sectional view of the rotating part along the line VI-VI in Fig. 5th

Die erfindungsgemäße Mahlgarnitur eines Kegelrefiners besteht, wie in den Zeichnungen dargestellt, aus einem als Hohlkegelstumpf ausgebildeten stationären Teil 1 und einem in diesem angeordneten, als Kegelstumpf ausgebildeten angetriebenen rotierenden Teil 2.The grinding set according to the invention of a cone refiner consists, as shown in the drawings, of a stationary part 1 designed as a hollow truncated cone and a driven rotating part 2 arranged therein, designed as a truncated cone.

Der in Fig. 1 und 2 schematisch dargestellte stationäre Teil weist eine innere kegelringförmige Vormahlzone 3 und eine äußere kegelringförmige Feinmahlzone 4 auf.The stationary part shown schematically in FIGS. 1 and 2 has an inner conical pre-grinding zone 3 and an outer conical fine grinding zone 4.

In der Vormahlzone 3 sind in Kegelringsegmenten parallel zueinander angeordnete stegförmige Messer 5 vorgesehen. Die Messer 5 sind vorzugsweise Stahlmesser und auf ein Gußteil 6 aufgeschweißt. Der Flächenanteil der stegförmigen Messer in der Vormahlzone 3 beträgt höchstens 25 bis 30%, so daß 70 bis 75% an Flächenanteil für die offene Fläche zwischen den Messern 5 verbleibt. Ein Messer 5 pro Kegelringsegment ist ganz nach innen geführt.In the pre-grinding zone 3, web-shaped knives 5 arranged parallel to one another are provided in cone ring segments. The knives 5 are preferably steel knives and welded onto a casting 6. The area of the web-shaped knives in the pre-grinding zone 3 is at most 25 to 30%, so that 70 to 75% of the area remains for the open area between the knives 5. One knife 5 per cone ring segment is guided all the way in.

Die Tiefe der Kanäle zwischen den stegförmigen Messern 5 in der Vormahlzone 3 beträgt vorzugsweise etwa 20 mm. Der mittlere Messerwinkel der Messer 5 zu den Kegelmantellinien beträgt in der Vormahlzone 3 etwa 12°.The depth of the channels between the web-shaped knives 5 in the pre-grinding zone 3 is preferably approximately 20 mm. The mean knife angle of the knives 5 to the cone surface lines in the pre-grinding zone 3 is approximately 12 °.

Die an die Vormahlzone 3 des stationären Teils 1 anschließende Feinmahlzone 4 weist ebenfalls parallel zueinander angeordnete stegförmige Messer 7 auf. Diese Messer 7 sind vorzugsweise auf in der Feinmahlzone 4 eingesetzten harten, qualitativ hochwertigen Mahlsegmenten ausgebildet. Der Flächenanteil der Messer 7 in der Feinmahlzone 4 beträgt etwa 50%.The fine grinding zone 4 adjoining the pre-grinding zone 3 of the stationary part 1 likewise has web-shaped knives 7 arranged parallel to one another. These knives 7 are preferably formed on hard, high-quality grinding segments used in the fine grinding zone 4. The area proportion of the knives 7 in the fine grinding zone 4 is approximately 50%.

Die Tiefe der Kanäle zwischen den stegförmigen Messern 7 der Feinmahlzone 4 beträgt etwa 12 mm. Der mittlere Messerwinkel der Messer 7 zu den Kegelmantellinien beträgt in der Feinmahlzone 4 etwa 30°.The depth of the channels between the web-shaped knives 7 of the fine grinding zone 4 is approximately 12 mm. The mean knife angle of the knives 7 to the cone surface lines in the fine grinding zone 4 is approximately 30 °.

Der relativ kleine Messerwinkel in der Vormahlzone 3 führt dazu, daß hier das Material mehr zerschnitten wird und Klumpen aufgeschlagen werden. Der relativ größere Messerwinkel in der Feinmahlzone 4 führt dazu, daß das Mahlgut mehr gerieben und schonender behandelt wird. Der größte Preßdruck bei in den stationären Teil 1 eingesetztem rotierenden Teil 2 tritt im Bereich der relativ weichen Vormahlzone 3 auf.The relatively small knife angle in the pre-grinding zone 3 means that here the material is cut up more and lumps are opened. The relatively larger knife angle in the fine grinding zone 4 leads to the fact that Regrind is grated more and treated more gently. The greatest pressing pressure when the rotating part 2 is inserted in the stationary part 1 occurs in the area of the relatively soft pre-grinding zone 3.

Nach der Vormahlzone 3 und der Feinmahlzone 4 können zusätzlich eine oder mehrere, nicht dargestellte weitere Feinmahlzonen mit weiter unterschiedlicher Ausbildung und Anordnung der entsprechenden stegförmigen Messer vorgesehen sein.After the pre-grinding zone 3 and the fine grinding zone 4, one or more further fine grinding zones (not shown) with a further different design and arrangement of the corresponding web-shaped knives can additionally be provided.

In Fig. 3 und 4 ist ein erstes Ausführungsbeispiel des rotierenden Teils 2 der erfindungsgemäßen Mahlgarnitur schematisch dargestellt. Der rotierende Teil 2 weist eine einzige durchgehende Mahlzone 8 auf.3 and 4, a first embodiment of the rotating part 2 of the grinding set according to the invention is shown schematically. The rotating part 2 has a single continuous grinding zone 8.

In der Mahlzone 8 sind auf Kegelringsegmenten parallel zueinander angeordnete stegförmige Messer 9 vorgesehen. Diese Messer 9 sind vorzugsweise als auf ein Gußteil 10 aufgeschweißte Stahlmesser ausgebildet. Der Flächenanteil der stegförmigen Messer 9 in der Mahlzone 8 des rotierenden Teils 2 beträgt etwa 40%, so daß eine offene Fläche von etwa 60% verbleibt.In the grinding zone 8, web-shaped knives 9 arranged parallel to one another are provided on cone ring segments. These knives 9 are preferably designed as steel knives welded onto a cast part 10. The area of the bar-shaped knives 9 in the grinding zone 8 of the rotating part 2 is approximately 40%, so that an open area of approximately 60% remains.

Die Tiefe der Kanäle zwischen den stegförmigen Messern 9 des rotierenden Teils 2 beträgt vorzugsweise etwa 20 mm. Der mittlere Messerwinkel der Messer 9 des rotierenden Teils 2 zu den Kegelmantellinien beträgt im Bereich der Vormahlzone 3 des stationären Teils etwa 8° und im Bereich der Feinmahlzone 4 des stationären Teils etwa 10°. Der Grund dafür, daß der mittlere Messerwinkel im Bereich der Feinmahlzone 4 des stationären Teils 1 etwas größer ist, ist darin zu sehen, daß außen mehrere zusätzliche kleine Messer 9 vorgesehen sind.The depth of the channels between the web-shaped knives 9 of the rotating part 2 is preferably approximately 20 mm. The average knife angle of the knives 9 of the rotating part 2 to the conical surface lines is approximately 8 ° in the area of the pre-grinding zone 3 of the stationary part and approximately 10 ° in the area of the fine grinding zone 4 of the stationary part. The reason that the mean knife angle in the range the fine grinding zone 4 of the stationary part 1 is somewhat larger, that several additional small knives 9 are provided on the outside.

Mit dieser Ausbildung der Mahlzone 8 des rotierenden Teils 2 ergibt sich ein mittlerer Winkel zwischen den Messern 5 des stationären Teils 1 in der Vormahlzone 3 und den Messern 9 des rotierenden Teils 2 von etwa 20°, während der mittlere Winkel zwischen den Messern 7 des stationären Teils 1 in der Feinmahlzone 4 und den Messern 9 des rotierenden Teils 2 etwa 40° beträgt.With this design of the grinding zone 8 of the rotating part 2, an average angle between the knives 5 of the stationary part 1 in the pre-grinding zone 3 and the knives 9 of the rotating part 2 is approximately 20 °, while the average angle between the knives 7 of the stationary part Part 1 in the fine grinding zone 4 and the knives 9 of the rotating part 2 is approximately 40 °.

Ein weiteres Ausführungsbeispiel des rotierenden Teils 2 einer erfindungsgemäßen Mahlgarnitur ist schematisch in den Fig. 5 und 6 dargestellt. Hier weist der kegelstumpfförmige rotierende Teil 2 eine innere kegelringförmige Vormahlzone 11 und eine äußere kegelringförmige Feinmahlzone 12 auf, in denen sich die Ausbildung und Anordnung von stegförmigen Messern 13 in der Vormahlzone 11 und stegförmigen Messern 14 in der Feinmahlzone 12, voneinander unterscheiden. Die Messer 13 der Vormahlzone 11 des rotierenden Teils 2 sind hier wieder in Kegelringsegmenten parallel zueinander angeordnet. Vorzugsweise sind die Messer 13 der Vormahlzone 11 des rotierenden Teils 2 als auf ein Gußteil 15 aufgeschweißte Stahlmesser ausgebildet.Another embodiment of the rotating part 2 of a grinding set according to the invention is shown schematically in FIGS. 5 and 6. Here, the frustoconical rotating part 2 has an inner cone-shaped pre-grinding zone 11 and an outer cone-shaped fine grinding zone 12, in which the design and arrangement of web-shaped knives 13 in the pre-grinding zone 11 and web-shaped knives 14 in the fine grinding zone 12 differ from one another. The knives 13 of the pre-grinding zone 11 of the rotating part 2 are again arranged parallel to one another in conical ring segments. The knives 13 of the pre-grinding zone 11 of the rotating part 2 are preferably designed as steel knives welded onto a cast part 15.

Die Ausbildung und Anordnung der stegförmigen Messer 13 in der Vormahlzone 11 des rotierenden Teils 2 entspricht der Ausbildung und Anordnung der stegförmigen Messer 9 in der einzigen Mahlzone 8 des rotierenden Teils 2 wie im Zusammenhang mit Fig. 3 und 4 beschrieben.The design and arrangement of the bar-shaped knives 13 in the pre-grinding zone 11 of the rotating part 2 corresponds to the design and arrangement of the bar-shaped knives 9 in the single grinding zone 8 of the rotating part 2 as described in connection with FIGS. 3 and 4.

Die stegförmigen Messer 14 der Feinmahlzone 12 des rotierenden Teils 2 sind auch hier vorzugsweise auf in der Feinmahlzone 12 des rotierenden Teils 2 eingesetzten harten Mahlsegmenten ausgebildet.The web-shaped knives 14 of the fine grinding zone 12 of the rotating part 2 are here also preferably formed on hard grinding segments used in the fine grinding zone 12 of the rotating part 2.

Der Kegelöffnungswinkel von stationärem Teil 1 und rotierendem Teil 2 beträgt etwa 60°.The cone opening angle of the stationary part 1 and rotating part 2 is approximately 60 °.

Claims (17)

  1. Beating equipment of a Jordan refiner for beating pulp
    - with a rotating part (2) of frustoconical construction on the outer peripheral surface of which ridge-like blades (9; 13, 14) are mounted at predetermined angles to the cone surface lines, and
    - with a stationary part (1) of hollow frustoconical construction on the inner peripheral surface of which ridge-like blades (5, 7) are mounted at predetermined angles to the cone surface lines,
    characterised in that
    - after a prebeating zone (3; 8, 11) are arranged one or more refining zones (4; 8, 12) of which the design and arrangement are adapted to the respective fibre state and the respective desired fibre development of the furnish flowing through the beating equipment,
    - the ridge-like blades (5, 7; 9; 13, 14) in the respective zones (3, 8, 11; 4, 8, 12) extend rectilinearly in plane development, and
    - at least in the stationary part (1) the mean blade angles to the cone surface lines are at least about 10° in the prebeating zone (3) and at least about 20° in the refining zone (4).
  2. Beating equipment according to claim 1, characterised in that the stationary part (1) comprises an inner cone ring-shaped prebeating zone (3) and one or more subsequent refining zones (4), in which the design and arrangement of the ridge-like blades (5) in the prebeating zone (3) and of the ridge-like blades (7) or corresponding edge-like structures in the refining zones (4) differ from each other substantially.
  3. Beating equipment according to claim 1 or 2, characterised in that the surface area proportion of the ridge-like blades (5, 7) of the stationary part (1) is not more than 25 to 30% in the prebeating zone (3) and about 50% in the refining zone (4).
  4. Beating equipment according to claim 3, characterised in that the depth of the channels between the ridge-like blades (5) in the prebeating zone (3) is substantially greater than the depth of the channels between the ridge-like blades (7) in the refining zone (4).
  5. Beating equipment according to claim 3 or 4, characterised in that the depth of the channels between the ridge-like blades (5, 7) is about 20 mm in the prebeating zone (3) and about 12 mm in the refining zone (4).
  6. Beating equipment according to claim 3, 4 or 5, characterised in that in the stationary part (1) the mean blade angle to the cone surface lines is about 12° in the prebeating zone (3) and about 30° in the refining zone (4).
  7. Beating equipment according to any of the preceding claims, characterised in that the stationary part (1) is constructed as a casting (6) with steel blades welded on or cast integrally in the prebeating zone (3) and hard beating segments mounted in the refining zone (4).
  8. Beating equipment according to any of the preceding claims, characterised in that the rotating part (2) comprises a continuous beating zone (8).
  9. Beating equipment according to claim 8, characterised in that the surface area proportion of the ridge-like blades (9) of the rotating part (2) in the beating zone (8) is about 40%.
  10. Beating equipment according to claim 9, characterised in that the depth of the channels between the ridge-like blades (9) of the rotating part (2) is about 20 mm.
  11. Beating equipment according to claim 8 or 9, characterised in that the mean blade angle of the blades (9) of the rotating part (2) to the cone surface lines is about 8° in the region of the prebeating zone (3) of the stationary part (1) and about 10° in the region of the refining zone (4) of the stationary part (1).
  12. Beating equipment according to any of the preceding claims, characterised in that the rotating part (2) is constructed as a casting (10) with steel blades welded on.
  13. Beating equipment according to any of claims 1 to 7, characterised in that the rotating part (2) comprises at least one inner cone ring-shaped prebeating zone (11) and one or more subsequent refining zones (12), in which the design and arrangement of the ridge-like blades (13) in the prebeating zone (11) and of the ridge-like blades (14) or corresponding edge-like structures in the refining zones (12) differ substantially.
  14. Beating equipment according to claim 13, characterised in that the design and arrangement of the ridge-like blades (13) of the rotating part (2) in the prebeating zone (11) correspond to those of a rotating part (2) with a continuous beating zone (8).
  15. Beating equipment according to claim 13 or 14, characterised in that the rotating part (2) is constructed as a casting (15) with steel blades welded on or cast integrally in the prebeating zone (11) and hard beating segments mounted in the refining zone (12).
  16. Beating equipment according to any of the preceding claims, characterised in that the mean angle between the blades (5, 7; 9, 13, 14) of the stationary part (1) and rotating part (2) is about 20° in the prebeating zone (3) and about 40° in the refining zone (4).
  17. Beating equipment according to any of the preceding claims, characterised in that the cone angle is about 60°.
EP90907039A 1989-05-19 1990-05-18 Grinding equipment for a wide angle conical refiner Expired - Lifetime EP0425630B1 (en)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
DE3916393 1989-05-19
DE3916393A DE3916393A1 (en) 1989-05-19 1989-05-19 GRINDING SET OF A CONE REFINER
PCT/EP1990/000811 WO1990014464A1 (en) 1989-05-19 1990-05-18 Grinding equipment for a jordan refiner

Publications (2)

Publication Number Publication Date
EP0425630A1 EP0425630A1 (en) 1991-05-08
EP0425630B1 true EP0425630B1 (en) 1994-10-19

Family

ID=6381007

Family Applications (1)

Application Number Title Priority Date Filing Date
EP90907039A Expired - Lifetime EP0425630B1 (en) 1989-05-19 1990-05-18 Grinding equipment for a wide angle conical refiner

Country Status (9)

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US (1) US5354005A (en)
EP (1) EP0425630B1 (en)
JP (1) JPH04501145A (en)
AT (1) ATE113096T1 (en)
CA (1) CA2033073A1 (en)
DE (2) DE3916393A1 (en)
ES (1) ES2063352T3 (en)
FI (1) FI97399C (en)
WO (1) WO1990014464A1 (en)

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BR9600509A (en) * 1996-01-29 1996-12-24 Pilao Sa Maquinas Equip Improvements in conical pulp refiners for papermaking
US7398938B2 (en) * 2002-04-25 2008-07-15 Andritz Inc. Conical refiner plates with logarithmic spiral type bars
US7472855B2 (en) * 2006-01-09 2009-01-06 Andritz Inc. Refiner stator plate having an outer row of teeth slanted to deflect pulp and method for pulp deflection during refining
FI122364B (en) * 2006-01-30 2011-12-30 Metso Paper Inc Refiner
FI122889B (en) * 2010-12-31 2012-08-31 Upm Kymmene Corp Method and apparatus for preparing nanocellulose
US20140054402A1 (en) * 2011-05-01 2014-02-27 Xingliang Zhu Rotary crushing pair with uneven surfaces
CN106902916A (en) * 2017-04-18 2017-06-30 随州市艾草堂科技有限公司 A kind of device for preparing long fibre moxa
WO2019136046A1 (en) * 2018-01-02 2019-07-11 International Paper Company Apparatus and method for processing wood fibers
US11421382B2 (en) 2018-01-02 2022-08-23 International Paper Company Apparatus and method for processing wood fibers
US11001968B2 (en) 2018-01-02 2021-05-11 International Paper Company Apparatus and method for processing wood fibers
CN109176960A (en) * 2018-09-29 2019-01-11 安徽蓝通科技股份有限公司 Plastic grinder
CN114260080B (en) * 2021-12-27 2023-03-24 潍坊市精华粉体工程设备有限公司 Smash hierarchical all-in-one of plastic

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US27246A (en) * 1860-02-21 Conical orinding-mill
US349332A (en) * 1886-09-21 Bar or blade for the rolls of paper-pulp engines
US2776800A (en) * 1952-06-27 1957-01-08 Cascades Plywood Corp Air flow plate grinders
US2694344A (en) * 1952-07-16 1954-11-16 Black Clawson Co Paper machinery
US2651976A (en) * 1952-11-05 1953-09-15 Lionel M Sutherland Grinding disk
US2931586A (en) * 1957-08-16 1960-04-05 American Defibrator Grinding device for the breaking down of wood fibres
US3305183A (en) * 1964-06-15 1967-02-21 Morden Machines Company Machine for treating pulp material
FR1466983A (en) * 1966-02-03 1967-01-20 Jones Division Defibration installation
US3452939A (en) * 1967-03-03 1969-07-01 Bolton Emerson Rough cast segmental fillings for pulp refiners
US3614826A (en) * 1967-11-23 1971-10-26 Milton Pilao Method for the manufacture and recovery of conical and discs sets for woodpulp machines
CH497604A (en) * 1969-09-27 1970-10-15 Pilao Acos E Refinadores Limit Process for the manufacture of refiners for the refining of paper pulps
GB2044631B (en) * 1979-04-12 1983-03-23 Inox Ind Comercio De Aco Conical refiners

Also Published As

Publication number Publication date
JPH04501145A (en) 1992-02-27
ES2063352T3 (en) 1995-01-01
FI97399C (en) 1996-12-10
ATE113096T1 (en) 1994-11-15
FI97399B (en) 1996-08-30
CA2033073A1 (en) 1990-11-20
US5354005A (en) 1994-10-11
DE3916393A1 (en) 1990-11-22
EP0425630A1 (en) 1991-05-08
WO1990014464A1 (en) 1990-11-29
FI910241A0 (en) 1991-01-16
DE59007501D1 (en) 1994-11-24

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