EP1804973A1 - Press roller annular casing and method for production thereof - Google Patents

Press roller annular casing and method for production thereof

Info

Publication number
EP1804973A1
EP1804973A1 EP05783028A EP05783028A EP1804973A1 EP 1804973 A1 EP1804973 A1 EP 1804973A1 EP 05783028 A EP05783028 A EP 05783028A EP 05783028 A EP05783028 A EP 05783028A EP 1804973 A1 EP1804973 A1 EP 1804973A1
Authority
EP
European Patent Office
Prior art keywords
bandage
ring
press
roll
roller
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Granted
Application number
EP05783028A
Other languages
German (de)
French (fr)
Other versions
EP1804973B1 (en
EP1804973B9 (en
Inventor
Alexander Hagedorn
Meinhard Frangenberg
Dieter Brendler
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
KHD Humboldt Wedag AG
Original Assignee
KHD Humboldt Wedag AG
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Application filed by KHD Humboldt Wedag AG filed Critical KHD Humboldt Wedag AG
Publication of EP1804973A1 publication Critical patent/EP1804973A1/en
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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B02—CRUSHING, PULVERISING, OR DISINTEGRATING; PREPARATORY TREATMENT OF GRAIN FOR MILLING
    • B02C—CRUSHING, PULVERISING, OR DISINTEGRATING IN GENERAL; MILLING GRAIN
    • B02C4/00—Crushing or disintegrating by roller mills
    • B02C4/28—Details
    • B02C4/30—Shape or construction of rollers
    • B02C4/305—Wear resistant rollers

Definitions

  • the invention relates to a ring bandage with wear-resistant Oberflä ⁇ surface for a press roller for the compressive stress of granular material, in particular for roller presses for Gutbettzerkleintation. Moreover, the invention relates to a method for manufacturing such a press roll ring bandage.
  • the invention is based on the object, in particular for the press rolls of roller presses for the pressure granulation of granular material, to create a ring bandage whose outer surface always has a high wear resistance, without embedded hard metal bodies such as, for example. B. need to apply bolts produced by powder metallurgy Noppen ⁇ .
  • the material of the annular bandage according to the invention for a press roll in particular for comminution of granular material, consists of spheroidal graphite cast iron with bainitic structure with retained austenite, this material being so adjusted in its property that it has such a ductility that the ring bandage, the wall thickness can be up to about 500 mm, without shrinkage on a roll body with shaft journals firmly shrink.
  • the wall thickness can be up to about 500 mm, without shrinkage on a roll body with shaft journals firmly shrink.
  • the greatest hardness and wear resistance is essentially on the surface and in the outer layers of the bandage and not in the radially inner regions of the bandage.
  • the hardness in the edge layers of the bandage forms and renews itself again and again during operation of the roll machine until the bandage has been consumed after a long period of time down to the structurally necessary residual wall thickness.
  • the ring bandage according to the invention thus forms self-hardening edge layers.
  • spaced-apart recesses are formed, for. B. molded during casting and / or molded by mechanical processing in particular Nutenschlei ⁇ fen, so that in operation of the Walzenzeschine in the Nuten ⁇ recesses of the profiled outer surface of the annular bandage to be treated Gutmaterial is pressed, which remains there during the roller revolutions, an autogenous wear forms contactor for the drum surfaces and due to its Rau ⁇ ability also has a good intake behavior.
  • the profiling protrusions of the bandage surface that are located between the spaced groove recesses can still be armored by build-up welding beads consisting of hard material.
  • This additional armoring of the ring bandage according to the invention creates no problems since the welding stresses arising during buildup welding are almost neutralized by the dimensioning and geometric distribution of the material bumps between the spaced grooves and thus the crack formation of the annular bandage material in this way is avoided by welding.
  • the method for producing a press roller ring bandage for the compressive stress granular material especially for roller presses for Gutbettzerkleintation gekennzeich ⁇ net, that the ring bandage is cast first of cast iron with nodular graphite with at least the alloying elements Ni and Mo while avoiding a pearlitic structure and by a subsequent heat treatment and subsequent controlled cooling Ab ⁇ the cast body is given a bainitic structure with retained austenite, which by pressure load on the outer surface of the annular bandage in their operation whose outer surface layers are cured again and again to form martensite.
  • the shaping of the surface profiling of the annular bandage is in particular accomplished by groove grinding.
  • FIG. 2 shows an outer section of the circumference of the Ringban ⁇ dage of FIG. 1 in a vertical section transversely to Wal ⁇ zenachse.
  • the material of the bandage 10 consists of nodular cast iron with Bavarian structure with retained austenite.
  • the roll surface contains high levels of martensite, which are formed again and again by external pressure loading of the bandage surface, in particular during operation of the press roll.
  • the pressing-pressure occurring during the comminution in the nip of a roller press can be e.g. B. greater than 100 MPa and the specific pressing force z. B. 8 to 10 t / cm roll width.
  • the hardness of the ring bandage according to the invention can, for. B. be about 40 HRC.
  • the hardness and wear resistance form and renew during operation of the press roll over and over again until the ring bandage has been used up after a long period of time.
  • depressions which are spaced apart from one another are formed in the outer surface of the annular bandage 10, 11, namely grooves 12, 13 which may be molded by casting, but are produced in particular by mechanical processing such as grooving.
  • the profiling projections of the drum surface lying between the spaced recesses 12, 13 can still be armored by hard-application welding beads 14 or by other hard materials.

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  • Engineering & Computer Science (AREA)
  • Food Science & Technology (AREA)
  • Crushing And Grinding (AREA)
  • Rolls And Other Rotary Bodies (AREA)

Abstract

According to the invention, an annular casing for the press rollers of roller presses for the pressure comminutation of particulate material, the outer surface of which has a permanently high degree of hardness and thus high wear resistance, the radially inner region of which however has a lower hardness to avoid casing fractures may be achieved, whereby the material of the casing (10, 11) is made from nodular cast iron, with at least the alloying elements Ni and Mo and a bainitic structure with residual austenite and the boundary layer (11) of the annular casing (10) contains martensite to achieve a self-hardening surface which is constantly renewed by external pressure loading of the casing surface on operating the press roller.

Description

Presswalzen-Ringbandage und Verfahren zu ihrer Hersteilung Press roller ring bandage and method for its production
B E S C H R E I B U N GDESCRIPTION
Die Erfindung betrifft eine Ringbandage mit verschleißfester Oberflä¬ che für eine Presswalze für die Druckbeanspruchung körnigen Gutes, insbesondere für Rollenpressen zur Gutbettzerkleinerung. Außerdem betrifft die Erfindung ein Verfahren zur Fertigung einer solchen Presswalzen-Ringbandage.The invention relates to a ring bandage with wear-resistant Oberflä¬ surface for a press roller for the compressive stress of granular material, in particular for roller presses for Gutbettzerkleinerung. Moreover, the invention relates to a method for manufacturing such a press roll ring bandage.
Bei Walzenmühlen wird körniges sprödes Mahlgut in den Walzen¬ spalt, durch den die beiden drehbar gelagerten gegenläufig rotierba¬ ren Walzen voneinander getrennt sind, eingezogen und dort einer Druckzerkleinerung unterworfen. Bekannt ist auch die sogenannte Gutbettzerkleinerung im Walzenspalt einer Hochdruck-Walzenmühle, auch Rollenpresse genannt, bei der die einzelnen Partikel des durch Reibung in den Walzenspalt eingezogenen Mahlgutes in einem Gut¬ bett, d. h. in einer zwischen den beiden Walzenoberflächen zusam- mengedrückten Materialschüttung bei Anwendung eines hohen Dru¬ ckes gegenseitig zerquetscht werden. Dabei sind die Walzenoberflä¬ chen einer hohen Verschleißbeanspruchung ausgesetzt, so dass an solche Walzenoberflächen wenigstens die folgenden Anforderungen gestellt werden:In roll mills, granular, brittle material to be ground is fed into the roll gap, by means of which the two rotatably mounted counterrotatable rolls are separated from one another, where they are subjected to pressure comminution. Also known is the so-called comminuted comminution in the nip of a high-pressure roller mill, also called a roller press, in which the individual particles of the comminuted material drawn in by friction into the nip are bedded in a bed of material. H. be crushed each other in a mixed between the two roll surfaces material bulk with application of a high pressure. In this case, the roll surfaces are exposed to high wear stress, so that at least the following requirements are imposed on such roll surfaces:
Sie sollen eine hohe Verschleißwiderstandsfähigkeit haben, kosten¬ günstig hergestellt werden können, durch den Betreiber der Rollen¬ presse repariert werden können, und auch ein gutes Einzugsverhal¬ ten für das zu zerkleinernde Gut besitzen. Aus dem Aufsatz der Fachzeitschrift "ZKG International" Nr. 7/1997, Seiten 384 bis 392 ist es auf Seite 384 Absatz 1 zum Verschlei߬ schutz bei Hochdruck-Rollenpressen bekannt, dass Walzen- Bandagen aus Hartguss wegen ihrer hohen Druckfestigkeit vorteilhaft sein können und dass mit Bandagen aus legiertem Sphäroguss hohe Standzeiten der Rollenpresse erreicht werden können, wobei man in der Werkstoffkunde unter dem Begriff Sphäroguss Gusseisen mit Ku¬ gelgraphit versteht. Bekannt ist ferner aus dem Nachdruck aus der Fachzeitschrift "konstruieren + gießen" 1988 Nr. 1 der Zentrale für Gußverwendung, Düsseldorf mit dem Aufsatz "Gusseisen mit Kugel¬ graphit" (Duktiles Gusseisen) Seiten 13-16, dem Kugelgraphitguss durch eine spezielle Wärmebehandlung, dem sogenannten Bainitver- güten eine hohe Duktilität und Druckfestigkeit zu geben.They are to have a high resistance to wear, can be manufactured inexpensively, can be repaired by the operator of the roller press, and also have a good intake behavior for the product to be comminuted. From the article of the journal "ZKG International" No. 7/1997, pages 384 to 392 it is on page 384 paragraph 1 for Verschlei߬ protection in high-pressure roller presses known that roll bandages made of chilled cast iron can be advantageous because of their high compressive strength and that high service life of the roller press can be achieved with bandages made of alloyed nodular cast iron, wherein in material science the term spheroidal cast iron is understood to mean cast iron with spherical graphite. It is also known from the reprint from the journal "construct + pour" 1988 No. 1 of the headquarters for casting use, Dusseldorf with the essay "cast iron with Kugel¬ graphite" (Ductile cast iron) pages 13-16, the nodular cast iron by a special heat treatment, To give the so-called bainite grade a high ductility and compressive strength.
Aus der EP-A 0 563 564 und EP-A 0 916 407 ist es bekannt, den Hartguss-Walzenmantel einer Mahlwalze aus einer bainitischen Gusseisenlegierung herzustellen und zur Erhöhung der Verschlei߬ festigkeit und der Mahlguteinzugsfähigkeit auf der Außenumfangsflä- che des Walzenmantels eine Oberflächenprofilierung aus Hartauf- tragsschweißwerkstoffen aufzubringen. Auftragsschweißraupen sind zwar in der Lage, zur Verbesserung des Einzugsverhaltens des Auf¬ gabegutes beizutragen, aber nicht zum autogenen Verschleißschutz, weil Auftragsschweißraupen mit ihrem typischen abgerundeten Profil das in die Zwischenräume zwischen den Schweißraupen gelangende Gutmaterial nicht dauerhaft festhalten können.It is known from EP-A 0 563 564 and EP-A 0 916 407 to produce the chilled cast iron roll mantle from a bainitic cast iron alloy and, in order to increase the wear resistance and the comminution property on the outer circumferential surface of the roll mantle, surface profiling Hard-facing welding materials. Although hardfacing beads are able to contribute to improving the intake behavior of the feedstock, they are not suitable for autogenous wear protection, because hardfacing beads with their typical rounded profile can not permanently hold the good material reaching into the spaces between the weld beads.
Schließlich ist es aus der EP-B O 516 952 Fig. 2 bekannt, die Wal¬ zenoberfläche von Rollenpressen dadurch verschleißfester zu ma¬ chen, indem auf der Walzenoberfläche eine Vielzahl von vorgefertig- ten Hartmetallkörpern wie z. B. Noppenbolzen angeordnet wird, die in entsprechende Sacklochbohrungen des Walzenmantels eingelagert sind. Bei dieser sogenannten Rasterpanzerung stehen die Noppen- bolzen mit einer so großen Höhe nach außen von der Walzenoberflä¬ che vor und sie sind mit einem solchen Abstand voneinander ange¬ ordnet, dass im Betrieb der Rollenpresse auf der Walzenoberfläche die Zwischenräume zwischen den Noppenbolzen mit dem zusam- mengepressten feinkörnigen Gutmaterial ausgefüllt bleiben, welches einen autogenen Verschleißschutz für die Walzenoberflächen bildet und aufgrund seiner Rauhigkeit auch ein gutes Einzugsverhalten auf¬ weist. Diese bekannte Walzenoberflächenpanzerung mit abwechselnd Zonen hochverschleißfesten Werkstoffes und Zwischenraumzonen anderer Verschleißfestigkeit hat sich bei der Gutbettzerkleinerung insbesondere von Erzmaterial in der Praxis bewährt.Finally, it is known from EP-B 0 516 952 FIG. 2 to make the roller surface of roller presses more wear-resistant by providing a multiplicity of prefabricated hard metal bodies, such as, for example, on the roller surface. B. knob stud is arranged, which are incorporated in corresponding blind holes of the roll shell. In this so-called grid armor stand the nubbly bolt with such a large amount outward from the Walzenoberflä¬ surface and they are ange¬ arranged with such a distance from each other, that remain in the operation of the roller press on the roll surface, the spaces between the stud bolts with the compressed together feinkörnigen Gutmaterial, which forms an autogenous wear protection for the roll surfaces and has a good intake behavior due to its roughness. This known roll surface armor with alternately zones highly wear-resistant material and gap zones other wear resistance has been proven in the Gutbettzerkleinerung particular ore material in practice.
Der Erfindung liegt die Aufgabe zugrunde, insbesondere für die Presswalzen von Rollenpressen zur Druckzerkleinerung körnigen Gu- tes eine Ringbandage zu schaffen, deren Außenoberfläche immer ei¬ ne hohe Verschleißwiderstandsfähigkeit aufweist, ohne eingelagerte Hartmetallkörper wie z. B. pulvermetallurgisch hergestellte Noppen¬ bolzen anwenden zu müssen.The invention is based on the object, in particular for the press rolls of roller presses for the pressure granulation of granular material, to create a ring bandage whose outer surface always has a high wear resistance, without embedded hard metal bodies such as, for example. B. need to apply bolts produced by powder metallurgy Noppen¬.
Diese Aufgabe wird gemäß der Erfindung mit der im Anspruch 1 be¬ anspruchten Ringbandage gelöst, die mit dem Verfahren mit den Merkmalen des Anspruchs 5 hergestellt wird. Vorteilhafte Ausgestal¬ tungen der Erfindung sind in den Unteransprüchen angegeben.This object is achieved according to the invention with the claimed in claim 1 ring bandage, which is produced by the method having the features of claim 5. Advantageous Ausgestal¬ obligations of the invention are specified in the subclaims.
Der Werkstoff der erfindungsgemäßen Ringbandage für eine Press¬ walze insbesondere für die Gutbettzerkleinerung körnigen Gutes be¬ steht aus Gusseisen mit Kugelgraphit mit bainitischem Gefüge mit Restaustenit, wobei dieser Werkstoff in seiner Eigenschaft so einge¬ stellt ist, dass er eine derartige Duktilität aufweist, dass sich die Ringbandage, deren Wanddicke bis zu etwa 500 mm betragen kann, ohne Bruchgefahr auf einen Walzengrundkörper mit Wellenzapfen fest aufschrumpfen lässt. Überraschend hat sich gezeigt, dass durch äußere Druckbelastung der Bandagenoberfläche der Gusswerkstoff an seiner Oberfläche und in seinen Randschichten durch Bildung von Martensit aufhärtet. Das heißt, bei der erfindungsgemäßen Ringban¬ dage liegt die größte Härte und Verschleißfestigkeit im wesentlichen an der Oberfläche und in den Randschichten der Bandage und nicht in den radial inneren Bereichen der Bandage. Die Härte in den Rand¬ schichten der Bandage bildet und erneuert sich beim Betrieb der Walzenmaschine immer wieder, bis die Bandage nach langer Stand¬ zeit bis auf die konstruktiv notwendige Restwandstärke verbraucht ist. Die erfindungsgemäße Ringbandage bildet also selbsthärtende Rand¬ schichten.The material of the annular bandage according to the invention for a press roll, in particular for comminution of granular material, consists of spheroidal graphite cast iron with bainitic structure with retained austenite, this material being so adjusted in its property that it has such a ductility that the ring bandage, the wall thickness can be up to about 500 mm, without shrinkage on a roll body with shaft journals firmly shrink. Surprisingly, it has been shown that through external pressure load of the bandage surface of the casting material hardens on its surface and in its peripheral layers by formation of martensite. That is, in the Ringban¬ invention days the greatest hardness and wear resistance is essentially on the surface and in the outer layers of the bandage and not in the radially inner regions of the bandage. The hardness in the edge layers of the bandage forms and renews itself again and again during operation of the roll machine until the bandage has been consumed after a long period of time down to the structurally necessary residual wall thickness. The ring bandage according to the invention thus forms self-hardening edge layers.
In die Außenoberfläche der Ringbandage sind voneinander beabstandete Vertiefungen eingeformt, z. B. beim Gießen eingeformt und/oder durch mechanische Bearbeitung insbesondere Nutenschlei¬ fen eingeformt, so dass im Betrieb der Walzenmäschine in die Nuten¬ vertiefungen der profilierten Außenoberfläche der Ringbandage zu behandelndes Gutmaterial eingepresst wird, welches dort während der Walzenumdrehungen verbleibt, einen autogenen Verschleiß- schütz für die Bandagenoberflächen bildet und aufgrund seiner Rau¬ higkeit auch ein gutes Einzugsverhalten aufweist. Dabei können die zwischen den beabstandeten Nutenvertiefungen liegenden Profilie- rungsvorsprünge der Bandagenoberfläche noch durch aus Hartstoff bestehende Auftragsschweißraupen gepanzert sein. Diese zusätzli- che Panzerung der erfindungsgemäßen Ringbandage schafft keine Probleme, da die beim Auftragsschweißen entstehenden Schwei߬ spannungen durch die Dimensionierung und geometrische Verteilung der Material-Höcker zwischen den beabstandeten Nuten nahezu neut¬ ralisiert werden und somit auf diese Weise die Rissbildung des Ring- bandagenwerkstoffes durch Schweißen vermieden wird. Das Verfahren zur Fertigung einer Presswalzen-Ringbandage für die Druckbeanspruchung körnigen Gutes insbesondere für Rollenpressen zur Gutbettzerkleinerung ist erfindungsgemäß dadurch gekennzeich¬ net, dass die Ringbandage zunächst aus Gusseisen mit Kugelgraphit mit wenigstens den Legierungselementen Ni und Mo unter Vermei¬ dung eines perlitischen Gefüges gegossen wird und durch eine an¬ schließende Wärmebehandlung und nachfolgende kontrollierte Ab¬ kühlung dem Gusskörper ein bainitisches Gefüge mit Restaustenit gegeben wird, wobei durch Druckbelastung der Außenoberfläche der Ringbandage bei deren Betrieb deren äußere Randschichten unter Ausbildung von Martensit immer wieder neu gehärtet werden. Das Einformen der Oberflächenprofilierung der Ringbandage wird insbe¬ sondere durch Nutenschleifen bewerkstelligt.In the outer surface of the annular bandage spaced-apart recesses are formed, for. B. molded during casting and / or molded by mechanical processing in particular Nutenschlei¬ fen, so that in operation of the Walzenmäschine in the Nuten¬ recesses of the profiled outer surface of the annular bandage to be treated Gutmaterial is pressed, which remains there during the roller revolutions, an autogenous wear forms contactor for the drum surfaces and due to its Rau¬ ability also has a good intake behavior. In this case, the profiling protrusions of the bandage surface that are located between the spaced groove recesses can still be armored by build-up welding beads consisting of hard material. This additional armoring of the ring bandage according to the invention creates no problems since the welding stresses arising during buildup welding are almost neutralized by the dimensioning and geometric distribution of the material bumps between the spaced grooves and thus the crack formation of the annular bandage material in this way is avoided by welding. The method for producing a press roller ring bandage for the compressive stress granular material especially for roller presses for Gutbettzerkleinerung according to the invention gekennzeich¬ net, that the ring bandage is cast first of cast iron with nodular graphite with at least the alloying elements Ni and Mo while avoiding a pearlitic structure and by a subsequent heat treatment and subsequent controlled cooling Ab¬ the cast body is given a bainitic structure with retained austenite, which by pressure load on the outer surface of the annular bandage in their operation whose outer surface layers are cured again and again to form martensite. The shaping of the surface profiling of the annular bandage is in particular accomplished by groove grinding.
Die Erfindung und deren weitere Merkmale und Vorteile werden an¬ hand des in der Zeichnung schematisch dargestellten Ausführungs¬ beispieles näher erläutert.The invention and its further features and advantages will be explained in more detail an¬ hand of Ausführungs¬ schematically illustrated in the drawing.
Es zeigt:It shows:
Fig. 1 : die Ansicht einer Presswalzenwelle einer Gutbettzerklei- nerungs-Rollenpresse mit aufgeschrumpfter Ringbandage im Schnitt gezeichnet, und1: the view of a press roll shaft of a Gutbettzerklei- nerungs roller press with shrunk ring bandage drawn in section, and
Fig. 2: einen äußeren Ausschnitt aus dem Umfang der Ringban¬ dage der Fig. 1 gezeigt im Vertikalschnitt quer zur Wal¬ zenachse.FIG. 2 shows an outer section of the circumference of the Ringban¬ dage of FIG. 1 in a vertical section transversely to Wal¬ zenachse.
Nach Fig. 1 ist auf einem Walzengrundkörper 8 mit Wellenzapfen 9a, 9b eine Ringbandage 10 mit einer Wanddicke von z. B. 170 mm bis 500 mm befestigt, insbesondere durch Aufschrumpfen. Der Werkstoff der Bandage 10 besteht aus Kugelgraphitguss mit bai- nitischem Gefüge mit Restaustenit. In der Randschicht 1 1 der Ring¬ bandage 10 enthält die Walzenoberfläche hohe Martensitanteile, die durch äußere Druckbelastung der Bandagenoberfläche insbesondere beim Betrieb der Presswalze immer wieder neu gebildet werden. Der bei der Gutbettzerkleinerung im Walzenspalt einer Rollenpresse auf¬ tretende Pressdruck kann z. B. größer 100 MPa und die spezifische Presskraft z. B. 8 bis 10 t/cm Walzenbreite betragen. Die Härte der erfindungsgemäßen Ringbandage kann z. B. etwa 40 HRC betragen. Die Härte und Verschleißfestigkeit bilden und erneuern sich während des Betriebes der Presswalze immer wieder, bis nach langer Stand¬ zeit die Ringbandage verbraucht ist.According to Fig. 1, a ring base 10 with a wall thickness of z. B. 170 mm to 500 mm attached, in particular by shrinking. The material of the bandage 10 consists of nodular cast iron with Bavarian structure with retained austenite. In the surface layer 11 of the annular bandage 10, the roll surface contains high levels of martensite, which are formed again and again by external pressure loading of the bandage surface, in particular during operation of the press roll. The pressing-pressure occurring during the comminution in the nip of a roller press can be e.g. B. greater than 100 MPa and the specific pressing force z. B. 8 to 10 t / cm roll width. The hardness of the ring bandage according to the invention can, for. B. be about 40 HRC. The hardness and wear resistance form and renew during operation of the press roll over and over again until the ring bandage has been used up after a long period of time.
Gemäß dem zeichnerischen Ausführungsbeispiel der Fig. 2 sind in die Außenoberfläche der Ringbandage 10, 1 1 voneinander beabstan- dete Vertiefungen eingeformt, nämlich Nuten 12, 13, die gießtech¬ nisch eingeformt sein können, aber insbesondere durch mechanische Bearbeitung wie Nutenschleifen hergestellt sind. Dabei können die zwischen den beabstandeten Vertiefungen 12, 13 liegenden Profilie- rungsvorsprünge der Bandagenoberfläche noch durch Hartauftrags- schweißraupen 14 oder durch andere Hartstoffe gepanzert sein.According to the drawing embodiment of FIG. 2, depressions which are spaced apart from one another are formed in the outer surface of the annular bandage 10, 11, namely grooves 12, 13 which may be molded by casting, but are produced in particular by mechanical processing such as grooving. In this case, the profiling projections of the drum surface lying between the spaced recesses 12, 13 can still be armored by hard-application welding beads 14 or by other hard materials.
Das beim Betrieb der Rollenpresse während der Gutbettzerkleinerung in die Vertiefungen 12, 13 mit einer Nutbreite von z. B. 10 bis 15 mm eingepresste Gutmaterial bildet einen autogenen Verschleißschutz, wodurch die ohnehin schon hohe Verschleißwiderstandfähigkeit der Oberfläche der erfindungsgemäßen Ringbandage 10 noch erhöht wird. During operation of the roller press during the comminution in the recesses 12, 13 with a groove width of z. B. 10 to 15 mm pressed material forms an autogenous wear protection, whereby the already high wear resistance of the surface of the ring bandage 10 according to the invention is still increased.

Claims

Presswalzen-Ringbandage und Verfahren zu ihrer HerstellungA N S P R Ü C H E Press roller ring bandage and method for its productionA NSPR Ü CHE
1. Ringbandage mit verschleißfester Oberfläche für eine Presswal¬ ze für die Druckbehandlung körnigen Gutes, insbesondere für Rollen¬ pressen zur Gutbettzerkleinerung, gekennzeichnet durch folgende Merkmale:1. Ring bandage with wear-resistant surface for a press roll for the pressure treatment of granular material, in particular for Rollen¬ presses for Gutbettzerkleinerung, characterized by the following features:
a) der Werkstoff der Bandage (10, 1 1 ) besteht aus Kugelgraphitguss mit wenigstens den Legierungselementen Ni und Mo und hat ein bainitisches Gefüge mit Restaustenit,a) the material of the bandage (10, 1 1) consists of nodular cast iron with at least the alloying elements Ni and Mo and has a bainitic structure with retained austenite,
b) die Randschichten (11) der Ringbandage (10) enthalten zurb) the edge layers (11) of the ring bandage (10) for
Erzielung einer harten Oberfläche Martensit, das durch äu¬ ßere Druckbelastung der Bandagenoberfläche beim Betrieb der Presswalze immer wieder neu gebildet wird,Achieving a hard surface Martensite, which is formed over and over again by external pressure load of the drum surface during operation of the press roll,
c) in die Außenoberfläche der Bandage (10, 1 1 ) sind vonein¬ ander beabstandete Vertiefungen (12, 13) für den autogenen Verschleißschutz eingeformt.c) in the outer surface of the bandage (10, 1 1) vonein¬ other spaced depressions (12, 13) are formed for the autogenous wear protection.
2. Ringbandage nach Anspruch 1 , dadurch gekennzeichnet, dass die in die Außenoberfläche der Ban¬ dage eingeformten Vertiefungen (12, 13) durch Nutenschleifen her¬ gestellt sind. 2. ring bandage according to claim 1, characterized in that the molded into the outer surface of Ban¬ dage depressions (12, 13) are provided by groove grinding Her¬.
3. Ringbandage nach Anspruch 1 , dadurch gekennzeichnet, dass die Bandage (10) eine Wanddicke bis zu etwa 500 mm aufweist und auf einem Walzengrundkörper mit Wel¬ lenzapfen aufgeschrumpft ist.3. ring bandage according to claim 1, characterized in that the bandage (10) has a wall thickness up to about 500 mm and is shrunk on a roll body with Wel¬ lenzapfen.
4. Ringbandage nach den Ansprüchen 1 oder 2, dadurch gekennzeichnet, dass die zwischen den voneinander beabstandeten Vertiefungen (12, 13) liegenden Profilierungsvor- sprünge durch aus Hartstoffen bestehende Auftragsschweißraupen (14) gepanzert sind.4. ring bandage according to claims 1 or 2, characterized in that between the spaced-apart recesses (12, 13) lying Profilierungsvor- jumps by hard materials existing build-up weld beads (14) are armored.
5. Verfahren zur Fertigung einer Presswalzen-Ringbandage für die Druckbeanspruchung körnigen Gutes, insbesondere für Rollenpres¬ sen zur Gutbettzerkleinerung, gekennzeichnet durch die Kombination folgender Merkmale:5. A method for producing a press roll ring bandage for the compressive stress of granular material, in particular for Rollenpres¬ sen for Gutbettzerkleinerung, characterized by the combination of the following features:
a) die Ringbandage (10, 1 1) wird aus Gusseisen mit Kugelgra¬ phit mit wenigstens den Legierungselementen Ni und Mo gegossen,a) the annular bandage (10, 1 1) is cast from cast iron with Kugelgra¬ phit with at least the alloying elements Ni and Mo,
b) durch eine anschließende Wärmebehandlung und nachfol¬ gende kontrollierte Abkühlung erhält der Gusskörper ein bainitisches Gefüge mit Restaustenit,b) by a subsequent heat treatment and subsequent controlled cooling, the cast body receives a bainitic structure with retained austenite,
c) durch Druckbelastung der Außenoberfläche der Ringbanda¬ ge (10, 11) werden deren Randschichten unter Ausbildung von Martensit immer wieder neu gehärtet,c) by compressive loading of the outer surface of the annular band (10, 11), their marginal layers are repeatedly hardened to form martensite,
d) in die Außenoberfläche der Ringbandage (10, 1 1 ) werden vor ihrem Einsatz in der Rollenpresse durch Angießen und/oder durch mechanische Bearbeitung insbesondere Nu- d) in the outer surface of the annular bandage (10, 11), before their use in the roller press, by casting and / or by mechanical processing, in particular
tenschleifen voneinander beabstandete Vertiefungen (12, 13) eingeformt. tenschleifen spaced recesses (12, 13) formed.
EP05783028.3A 2004-09-09 2005-09-07 Press roller annular casing and method for production thereof Active EP1804973B9 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE102004043562.6A DE102004043562B4 (en) 2004-09-09 2004-09-09 Press roller ring bandage and method for its production
PCT/EP2005/009574 WO2006027215A1 (en) 2004-09-09 2005-09-07 Press roller annular casing and method for production thereof

Publications (3)

Publication Number Publication Date
EP1804973A1 true EP1804973A1 (en) 2007-07-11
EP1804973B1 EP1804973B1 (en) 2013-06-05
EP1804973B9 EP1804973B9 (en) 2016-09-21

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EP (1) EP1804973B9 (en)
CN (1) CN100581652C (en)
DE (1) DE102004043562B4 (en)
DK (1) DK1804973T3 (en)
WO (1) WO2006027215A1 (en)

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DE102007007276B4 (en) 2007-02-14 2019-12-05 Khd Humboldt Wedag Gmbh Armoring of the surfaces of roller press rolls
DE102010024221A1 (en) 2010-06-18 2011-12-22 Khd Humboldt Wedag Gmbh Profiled bandage for a roller press
DE202012007144U1 (en) 2012-06-19 2012-08-03 Khd Humboldt Wedag Gmbh Profiled bandage for a roller press
DE102012106527B4 (en) * 2012-07-18 2016-01-21 Maschinenfabrik Köppern GmbH & Co KG Press roll for a roll press
CN102974421A (en) * 2012-12-17 2013-03-20 重庆京庆重型机械股份有限公司 Roller sleeve of roller press
CN102962652B (en) * 2012-12-17 2015-03-11 重庆京庆重型机械股份有限公司 Processing method for roller sleeve of roller press
DE102014006427A1 (en) * 2014-05-02 2015-11-05 Khd Humboldt Wedag Gmbh Roller with wear protection layer for a roller press
DE102018111621B4 (en) * 2018-05-15 2020-01-23 Helmut Prihoda Processes to improve the productivity of grinding plants
CN110154277B (en) * 2019-07-08 2020-06-19 霍昀 Broken rotor of junked tire and multi-functional breaker thereof

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DE4132474A1 (en) * 1991-05-28 1992-12-03 Kloeckner Humboldt Deutz Ag WEAR-RESISTANT GRINDING ROLLER FOR USE IN ROLLING MACHINES, ESPECIALLY IN HIGH PRESSURE ROLLING PRESSES
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US8388772B2 (en) 2013-03-05
CN100581652C (en) 2010-01-20
DE102004043562B4 (en) 2016-09-29
US7832671B2 (en) 2010-11-16
WO2006027215A1 (en) 2006-03-16
DE102004043562A1 (en) 2006-03-30
EP1804973B1 (en) 2013-06-05
US20110061773A1 (en) 2011-03-17
DK1804973T3 (en) 2013-09-08
CN101039752A (en) 2007-09-19
US20080191074A1 (en) 2008-08-14
EP1804973B9 (en) 2016-09-21

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