EP0383004B1 - Rollers for high-pressure roller presses - Google Patents
Rollers for high-pressure roller presses Download PDFInfo
- Publication number
- EP0383004B1 EP0383004B1 EP90100133A EP90100133A EP0383004B1 EP 0383004 B1 EP0383004 B1 EP 0383004B1 EP 90100133 A EP90100133 A EP 90100133A EP 90100133 A EP90100133 A EP 90100133A EP 0383004 B1 EP0383004 B1 EP 0383004B1
- Authority
- EP
- European Patent Office
- Prior art keywords
- roller
- wear
- rollers
- resistant
- lateral
- 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.)
- Revoked
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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 high-pressure rollers with two rotatably mounted counter-rotating rollers which are separated from one another by a nip for pressure comminution of granular material; see in particular EP-A-0271336.
- EP-A-0 271 336 proposes, for wear protection, to armor the roller surfaces in the circumferential direction in a strip-like manner with differently wear-resistant materials, the strips being in the axial direction or at an angle to the roller axis of run up to 45 °, in order to create an uneven roller surface that improves the regrind due to different wear and thus to minimize wear overall.
- Fig. 1 shows as a prior art detail of the top view of a high-pressure roller press with two rotatably mounted counter-rotating rollers (10, 11), which are separated from each other by a nip (12), in the granular material using a very high pressing pressure the material bed crushing described above is subjected.
- the roll shells have a cylindrical surface in the original new state, which is indicated by the dashed lines (13, 14).
- the roller surfaces are armored against wear.
- the roller gap (12) resulting from the wear profiles (15, 16) does not become uncontrollably large during the operation of the roller machine, for the purpose of adjusting the roller gap, without the rollers touching inadmissible ways at the peripheral points that are not so badly worn , the components (17, 18) [as well as on the corresponding opposite roller edges] that have remained on the side of the roller and have not yet worn out are artificially ground or otherwise removed.
- the volume of material to be abraded or removed or the lateral bead is indicated at (18) by left hatching.
- the invention has for its object to design high-pressure rollers so that the lateral beads or trough-shaped wear profiles of the roller surfaces described above do not occur or only after a very long operating time.
- the rollers according to the invention have wear-resistant roller armor, be it welded armor or a cast or rolled one-piece or multi-piece wear-resistant roller jacket.
- the wear-resistant roller surface is designed so that the lateral portions of the wear-resistant roller surface located in the region of the roller ends wear out more quickly and this higher wear counteracts the formation of the lateral beads on the roller surface.
- welded wear-resistant roller surface coatings this can be done by deliberately making less wear-resistant in the lateral roller end regions Materials or material welding layers are welded or welded on. This applies both to the new production of a wear-armored roller and to the regeneration of such a roller after it has worn out.
- the rollers have a cast wear-resistant surface armor
- the cast material for example based on chilled chrome cast iron, can be made less wear-resistant in the lateral roller surface end areas by locally introduced heating (tempering) than in the other areas of the surface armor .
- Fig. 2 shows a wear-resistant roller (19) with a cylindrical outer contour, at the two ends of which there is a transition region (20a, 20b) in which towards the roller end faces (21a, 21b) Roll diameter decreases, linearly or domed outwards.
- the advantage of the rollers according to the invention for the operation of the roller machine is that an adjustment of the roller geometry required by grinding the roller surface can be reduced to a minimum, if necessary at all.
- the useful life of the wear-resistant roller armor is extended in the rollers according to the invention.
- the costs and the availability of the roller machine are favorably influenced when using the rollers according to the invention.
Landscapes
- Engineering & Computer Science (AREA)
- Food Science & Technology (AREA)
- Rolls And Other Rotary Bodies (AREA)
- Crushing And Grinding (AREA)
- Treatment Of Fiber Materials (AREA)
- Press Drives And Press Lines (AREA)
Abstract
Description
Die Erfindung betrifft Hochdruck-Walzen mit zwei drehbar gelagerten gegenläufig rotierbaren und durch einen Walzenspalt voneinander getrennten Walzen zur Druckzerkleinerung körnigen Gutes; siche insbesondere EP-A- 0271336.The invention relates to high-pressure rollers with two rotatably mounted counter-rotating rollers which are separated from one another by a nip for pressure comminution of granular material; see in particular EP-A-0271336.
Bei Walzenbrechern und Walzenmühlen wird sprödes Mahlgut in den Walzenspalt eingezogen und dort einer Druckzerkleinerung unterworfen. Bekannt ist auch die sogenannte Gutbettzerkleinerung im Walzenspalt einer Hochdruck-Walzenpresse, bei der die einzelnen Partikel des durch Reibung in den Walzenspalt eingezogenen Mahlgutes in einem Gutbett, das heißt in einer zwischen den beiden Walzenoberflächen zusammengedrückten Materialschüttung bei Anwendung eines extrem hohen Druckes gegenseitig zerquetscht werden (EP-B-0 084 383). Es versteht sich, daß dabei die Walzenoberflächen einer außerordentlich hohen Beanspruchung und einem hohen Verschleiß ausgesetzt sind. Es ist daher bekannt, die Walzenoberfläche dadurch zu panzern, indem man auf den Walzengrundkörper Schweißlagen aus harten metallischen Werkstoffen aufschweißt oder indem man mit dem Walzengrundkörper einen einteiligen oder mehrteiligen verschleißfesten Mantel aus gegossenem oder gewalztem Werkstoff verbindet.In the case of roll crushers and roll mills, brittle ground material is drawn into the roll gap and subjected to pressure reduction there. Also known is the so-called material bed comminution in the roller gap of a high-pressure roller press, in which the individual particles of the ground material drawn into the roller gap by friction are crushed in a material bed, that is to say in a bed of material compressed between the two roller surfaces when an extremely high pressure is applied ( EP-B-0 084 383). It is understood that the roller surfaces are subjected to extremely high stress and wear. It is therefore known to armor the roller surface by welding weld layers of hard metallic materials onto the roller base body or by connecting a one-piece or multi-part wear-resistant jacket made of cast or rolled material to the roller base body.
Da besonders bei glatten Walzen ein erhöhter Verschleiß auftritt, wird beispielsweise in der EP-A-0 271 336 vorgeschlagen, zum Verschleißschutz die Walzenoberflächen in Umfangsrichtung mit unterschiedlich verschleißfesten Materialien streifenförmig zu panzern, wobei die Streifen in axialer Richtung oder in einem Winkel zur Walzenachse von bis zum 45 ° verlaufen, um so durch unterschiedlichen Verschleiß eine unebene, das Mahlgut verbessert einziehende Walzenoberfläche zu schaffen und damit insgesamt den Verschleiß zu minimieren.Since increased wear occurs particularly on smooth rollers, EP-A-0 271 336 proposes, for wear protection, to armor the roller surfaces in the circumferential direction in a strip-like manner with differently wear-resistant materials, the strips being in the axial direction or at an angle to the roller axis of run up to 45 °, in order to create an uneven roller surface that improves the regrind due to different wear and thus to minimize wear overall.
Beim Betrieb solcher Walzenpressen verschleißen die gepanzerten Walzenoberflächen aber nicht gleichmäßig. Es hat sich gezeigt, daß sich insbesondere bei Walzenpanzerungen mit großen Schichtstärken aus verschleißfesten Werkstoffen im Betrieb ein mulden- oder wannenförmiges Verschleißprofil ausbildet, wie es schematisch in Fig. 1 dargestellt ist.When operating such roller presses, the armored roller surfaces do not wear evenly. It has been shown that a trough-shaped or trough-shaped wear profile is formed during operation, in particular in the case of roller armouring with large layer thicknesses made of wear-resistant materials, as is shown schematically in FIG. 1.
Fig. 1 zeigt als Stand der Technik ausschnittsweise die Draufsicht auf eine Hochdruck-Walzenpresse mit zwei drehbar gelagerten gegenläufig rotierbaren Walzen (10, 11), die durch einen Walzenspalt (12) voneinander getrennt sind, in dem körniges Gut unter Anwendung eines sehr hohen Preßdruckes der oben beschriebenen Gutbettzerkleinerung unterworfen wird. Die Walzenmäntel haben im ursprünglichen neuen Zustand eine zylindrische Oberfläche, was durch die gestrichelten Linien (13, 14) angezeigt ist. Die Walzenoberflächen sind gegen Verschleiß gepanzert. Insbesondere bei großen Schichtstärken aus verschleißfesten Werkstoffen bildet sich im Betrieb der Hochdruck-Walzenpresse das oben beschriebene mulden- oder wannenförmige Verschleißprofil (15) der Walze (10 bzw. 16) der Walze (11) aus, das heißt die Walzen verschleißen an den seitlichen Randbereichen (17, 18) sowie an den gegenüberliegenden Randbereichen nicht so stark wie an den übrigen Oberflächenbereichen. Damit der sich durch die Verschleißprofile (15, 16) ergebende Walzenspalt (12) während des Betriebes der Walzenmaschine nicht unkontrolliert groß wird, müssen zum Zwecke des Nachstellens des Walzenspaltes, ohne daß sich die Walzen an den nicht so stark verschlissenen Umfangsstellen in unzulässiger Weise berühren, die seitlich in der Walzenoberfläche verbliebenen und noch nicht verschlissenen Bestandteile (17, 18) [sowie an den entsprechenden gegenüberliegenden Walzenrändern] künstlich abgeschliffen oder anderweitig entfernt werden. Dies setzt eine geeignete Walzenbearbeitungs-Einrichtung voraus und bedeutet zusätzliche Kosten sowie ein Herabsetzen der Verfügbarkeit der Walzenmaschine. Das jeweils abzuschleifende bzw. zu entfernende Materialvolumen bzw. der seitliche Wulst ist bei (18) durch Linksschraffur angedeutet.Fig. 1 shows as a prior art detail of the top view of a high-pressure roller press with two rotatably mounted counter-rotating rollers (10, 11), which are separated from each other by a nip (12), in the granular material using a very high pressing pressure the material bed crushing described above is subjected. The roll shells have a cylindrical surface in the original new state, which is indicated by the dashed lines (13, 14). The roller surfaces are armored against wear. Particularly in the case of large layer thicknesses made of wear-resistant materials, the trough-shaped or trough-shaped wear profile (15) of the roller (10 or 16) of the roller (11), which is described above, forms during operation of the high-pressure roller press, that is to say the rollers wear out on the lateral edge regions (17, 18) and on the opposite edge areas not as strongly as on the other surface areas. So that the roller gap (12) resulting from the wear profiles (15, 16) does not become uncontrollably large during the operation of the roller machine, for the purpose of adjusting the roller gap, without the rollers touching inadmissible ways at the peripheral points that are not so badly worn , the components (17, 18) [as well as on the corresponding opposite roller edges] that have remained on the side of the roller and have not yet worn out are artificially ground or otherwise removed. This requires a suitable roll processing device and means additional costs and a reduction in availability the roller machine. The volume of material to be abraded or removed or the lateral bead is indicated at (18) by left hatching.
Zur Lösung des aufgezeigten Problems wird in der Zement-Kalk-Gips Nr. 10/1988 auf Seite 495 vorgeschlagen, durch Einsatz neuer, den Zwickel zwischen der Mahlrollen abdichtenden Seitenplatten den Verschleiß weitgehend zu egalisieren. Ein angeführtes Beispiel zeigt aber, daß sich trotzdem ein muldenförmiges Walzenprofil durch verstärkten Verschleiß in der Mitte der Mahlrolle einstellt.To solve the problem shown, it is proposed in cement-lime gypsum No. 10/1988 on page 495 to largely level out wear by using new side plates that seal the gusset between the grinding rollers. A given example shows, however, that a trough-shaped roller profile nevertheless occurs due to increased wear in the center of the grinding roller.
Der Erfindung liegt die Aufgabe zugrunde, Hochdruck-Walzen so auszubilden, daß sich die oben beschriebenen seitlichen Wülste bzw. muldenförmigen Verschleißprofile der Walzenoberflächen nicht oder nur nach sehr langer Betriebszeit einstellen.The invention has for its object to design high-pressure rollers so that the lateral beads or trough-shaped wear profiles of the roller surfaces described above do not occur or only after a very long operating time.
Diese Aufgabe wird gemäß der Erfindung mit einer Walzenausbildung gelöst, die mit vorteilhaften Ausgestaltungen in den Ansprüchen 1 bis 5 gekennzeichnet ist.This object is achieved according to the invention with a roller design, which is characterized in advantageous embodiments in claims 1 to 5.
Die erfindungsgemäßen Walzen haben eine verschleißfeste Walzenpanzerung, sei es eine geschweißte Panzerung oder einen gegossenen oder gewalzten einteiligen oder mehrteiligen verschleißfesten Walzenmantel. Erfindungsgemäß ist die an sich verschleißfeste Walzenoberfläche verschleißtechnisch so ausgebildet, daß die im Bereich der Walzenenden gelegenen seitlichen Anteile der verschleißfesten Walzenoberfläche gezielt schneller verschleißen und dieser höhere Verschleiß dem Entstehen der seitlichen Wulste auf der Walzenoberfläche entgegenwirkt. Dies kann bei geschweißten verschleißfesten Walzenoberflächenbeschichtungen dadurch geschehen, daß in den seitlichen Walzenendbereichen bewußt weniger verschleißbeständige Werkstoffe bzw. Werkstoffschweißlagen aufgeschweißt bzw. eingeschweißt werden. Dies gilt sowohl für die Neufertigung einer verschleißgepanzerten Walze als auch für die Regenerierung einer solchen Walze, nachdem sie verschlissen ist.The rollers according to the invention have wear-resistant roller armor, be it welded armor or a cast or rolled one-piece or multi-piece wear-resistant roller jacket. According to the invention, the wear-resistant roller surface is designed so that the lateral portions of the wear-resistant roller surface located in the region of the roller ends wear out more quickly and this higher wear counteracts the formation of the lateral beads on the roller surface. With welded wear-resistant roller surface coatings, this can be done by deliberately making less wear-resistant in the lateral roller end regions Materials or material welding layers are welded or welded on. This applies both to the new production of a wear-armored roller and to the regeneration of such a roller after it has worn out.
Weisen die Walzen eine gegossene verschleißfeste Oberflächenpanzerung auf, so kann nach einem weiteren Merkmal der Erfindung der Gußwerkstoff, zum Beispiel auf der Basis von Chromhartguß, in den seitlichen Walzenoberflächenendbereichen durch örtlich eingebrachte Erwärmung (Anlassen) weniger verschleißfest gemacht werden als in den übrigen Bereichen der Oberflächenpanzerung.If the rollers have a cast wear-resistant surface armor, then according to a further feature of the invention, the cast material, for example based on chilled chrome cast iron, can be made less wear-resistant in the lateral roller surface end areas by locally introduced heating (tempering) than in the other areas of the surface armor .
Nach einem weiteren Merkmal der Erfindung besteht auch die Möglichkeit, beim Gießen der Walzenpanzerung in den seitlichen Endbereichen der Panzerung gießtechnisch weniger verschleißfeste Werkstoffe einzugießen.According to a further feature of the invention, it is also possible to cast less wear-resistant materials in the lateral end regions of the armor when casting the roller armor.
Eine weitere Möglichkeit eines bewußt höheren Walzenkantenverschleisses kann dadurch erreicht werden, daß nach einem weiteren Merkmal an den Walzenenden der Walzendurchmesser über jeweils einen Übergangsbereich in Richtung zu den seitlichen Walzenstirnseiten hin abnimmt. Diese Lösung ist in Fig. 2 dargestellt, die eine verschleißfeste Walze (19) mit einer zylindrischen Außenkontur zeigt, an deren beiden Enden sich ein Übergangsbereich (20a, 20b) anschließt, in dem in Richtung zu den Walzenstirnseiten (21a, 21b) hin der Walzendurchmesser abnimmt, und zwar linear oder auch nach außen ballig gewölbt.Another possibility of deliberately higher roll edge wear can be achieved in that, according to a further feature, the roll diameter decreases at the roll ends over a transition area in the direction of the lateral roll end faces. This solution is shown in Fig. 2, which shows a wear-resistant roller (19) with a cylindrical outer contour, at the two ends of which there is a transition region (20a, 20b) in which towards the roller end faces (21a, 21b) Roll diameter decreases, linearly or domed outwards.
In jedem Fall besteht der Vorteil der erfindungsgemäßen Walzen für den Betrieb der Walzenmaschine darin, daß eine durch Schleifen der Walzenoberfläche erforderliche Anpassung der Walzengeometrie, wenn überhaupt noch nötig, auf ein Minimum reduziert werden kann. Jedenfalls ist bei den erfindungsgemäßen Walzen die ausnutzbare Standzeit der verschleißfesten Walzenpanzerung verlängert. Insgesamt werden bei Einsatz der erfindungsgemäßen Walzen die Kosten sowie die Verfügbarkeit der Walzenmaschine günstig beeinflußt.In any case, the advantage of the rollers according to the invention for the operation of the roller machine is that an adjustment of the roller geometry required by grinding the roller surface can be reduced to a minimum, if necessary at all. In any case, the useful life of the wear-resistant roller armor is extended in the rollers according to the invention. Overall, the costs and the availability of the roller machine are favorably influenced when using the rollers according to the invention.
Claims (5)
- High-pressure rollers with two rollers (10, 11) separated from each other by a roller nip (12) such that they may rotate counter to each other for the pressure comminution of granular material, wherein the surfaces of the rollers are alternatingly armour-plated with a wear-resistant material and a less wear-resistant material, characterised in that the material of the roller surfaces subject to wear in the lateral peripheral regions of the rollers (17, 18) is less wear-resistant than over the remainder of the roller surfaces.
- Rollers according to Claim 1, characterised in that the rollers (10, 11) have a wear-resistant armour-plating welded on to them, with less wear-resistant material layers being welded on, or in, their lateral regions (17, 18).
- Rollers according to Claim 1, characterised in that the rollers (10, 11) are provided with a cast, wear-resistant, surface amour-plating and that the cast material - for example, one having chill-cast chromium as the base material - is rendered less wear-resistant in the lateral, peripheral roller regions (17, 18), for example through local warming (tempering), than over the remaining regions of the surface armour-plating.
- Rollers (10, 11) according to Claim 1, characterised in that less wear-resistant materials are poured in the lateral peripheral roller regions (17, 18) during casting of the roller armour-plating.
- Rollers (10, 11) according to Claim 1, characterised in that, at the roller ends, the roller diameter decreases along the transitional region (20a, 20b) in the direction of the roller front faces (21a, 21b).
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE3904678A DE3904678A1 (en) | 1989-02-16 | 1989-02-16 | ROLLERS FOR ROLLING MACHINES, ESPECIALLY FOR HIGH PRESSURE ROLLING PRESSES |
| DE3904678 | 1989-02-16 |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| EP0383004A1 EP0383004A1 (en) | 1990-08-22 |
| EP0383004B1 true EP0383004B1 (en) | 1994-03-16 |
Family
ID=6374226
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| EP90100133A Revoked EP0383004B1 (en) | 1989-02-16 | 1990-01-04 | Rollers for high-pressure roller presses |
Country Status (4)
| Country | Link |
|---|---|
| EP (1) | EP0383004B1 (en) |
| AT (1) | ATE102851T1 (en) |
| DE (2) | DE3904678A1 (en) |
| DK (1) | DK0383004T3 (en) |
Families Citing this family (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5518192A (en) * | 1994-03-15 | 1996-05-21 | Kabushiki Kaisha Kobe Seiko Sho | Vertical roller mill |
| DE10137131A1 (en) * | 2001-07-30 | 2003-02-13 | Polysius Ag | Roller for high pressure fluidized bed grinder has surface profiling with wear-resistant profiled bodies whose wear resistance matches stresses on rolling surface to achieve uniform wear over width of roller |
| DE102006003230A1 (en) * | 2006-01-24 | 2007-07-26 | Khd Humboldt Wedag Gmbh | Pair of rollers e.g. for high pressure roller presses for milling granular goods under pressure, has two swiveling stored rotatable rollers which move in opposite directions |
| WO2008106998A1 (en) * | 2007-03-08 | 2008-09-12 | Khd Humboldt Wedag Gmbh | Roller set for high-pressure roller presses for the pressure crushing of granulate goods |
| 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 |
| DE102013021764B4 (en) * | 2013-12-20 | 2019-06-19 | Khd Humboldt Wedag Gmbh | Process for incorporating depressions in a roll of rollers |
| DE202014004257U1 (en) | 2014-05-21 | 2014-06-12 | Khd Humboldt Wedag Gmbh | Roller press for high-pressure treatment of granular regrind |
| DE102019200190A1 (en) * | 2019-01-09 | 2020-07-09 | Thyssenkrupp Ag | Grinding roller with edge elements |
| CN111231287B (en) * | 2020-01-17 | 2021-12-10 | 大连理工大学 | Method for designing shape of rubber winding forming compression roller |
Family Cites Families (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE702059C (en) * | 1938-09-07 | 1941-10-20 | Ludwig Schoeffel | Roller for high-speed single and multi-roller mills |
| DE1050640B (en) * | 1956-10-06 | 1959-02-12 | ||
| DE3302176A1 (en) * | 1983-01-24 | 1984-07-26 | Klöckner-Humboldt-Deutz AG, 5000 Köln | METHOD AND SYSTEM FOR CONTINUOUS PRESSURE REDUCTION OF SPROEDEN GROUND MATERIAL |
| GB2193670B (en) * | 1986-08-11 | 1990-03-21 | Copper Refineries Pty Ltd | Mill roll |
| JPS63143949A (en) * | 1986-12-09 | 1988-06-16 | アイエヌジ商事株式会社 | Crushing surface member used for crusher |
-
1989
- 1989-02-16 DE DE3904678A patent/DE3904678A1/en not_active Withdrawn
-
1990
- 1990-01-04 DK DK90100133.9T patent/DK0383004T3/en active
- 1990-01-04 AT AT90100133T patent/ATE102851T1/en not_active IP Right Cessation
- 1990-01-04 DE DE90100133T patent/DE59004961D1/en not_active Revoked
- 1990-01-04 EP EP90100133A patent/EP0383004B1/en not_active Revoked
Also Published As
| Publication number | Publication date |
|---|---|
| ATE102851T1 (en) | 1994-04-15 |
| DE3904678A1 (en) | 1990-08-23 |
| DE59004961D1 (en) | 1994-04-21 |
| EP0383004A1 (en) | 1990-08-22 |
| DK0383004T3 (en) | 1995-03-27 |
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