EP2825316B1 - Presswalze - Google Patents

Presswalze Download PDF

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Publication number
EP2825316B1
EP2825316B1 EP13708140.2A EP13708140A EP2825316B1 EP 2825316 B1 EP2825316 B1 EP 2825316B1 EP 13708140 A EP13708140 A EP 13708140A EP 2825316 B1 EP2825316 B1 EP 2825316B1
Authority
EP
European Patent Office
Prior art keywords
edge protection
protection elements
roller
press
metal matrix
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
Application number
EP13708140.2A
Other languages
German (de)
English (en)
French (fr)
Other versions
EP2825316A1 (de
Inventor
Eggert De Weldige
Andreas Packeisen
Axel HÖFTER
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.)
Maschinenfabrik Koeppern GmbH and Co KG
Original Assignee
Maschinenfabrik Koeppern GmbH and Co KG
Priority date (The priority date 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 date listed.)
Filing date
Publication date
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Application filed by Maschinenfabrik Koeppern GmbH and Co KG filed Critical Maschinenfabrik Koeppern GmbH and Co KG
Publication of EP2825316A1 publication Critical patent/EP2825316A1/de
Application granted granted Critical
Publication of EP2825316B1 publication Critical patent/EP2825316B1/de
Revoked legal-status Critical Current
Anticipated expiration legal-status Critical

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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 press roll for a roll press, in particular for the comminution of highly abrasive substances, with a roll body, wherein a plurality of hard bodies are releasably secured as exchangeable edge protection elements on one or both roll edges of the roll body for edge protection.
  • a roll press usually has two press rolls.
  • the roller press is used in a particular extent of crushing and especially high-pressure crushing of coarse mineral materials such. As ores, cement clinker, slag, kimberlite, coal or ceramic base materials.
  • Such a roller press is also referred to as a good bed roller mill.
  • the invention also includes roller presses for compacting or briquetting material.
  • EP 1 502 650 B1 a press roll with arranged on the roll edges, circumferential recesses in the form of annular shoulders, wherein in each of these recesses a plurality of wear protection elements are arranged in the circumferential direction one behind the other.
  • the wear protection elements form a quasi-closed ring, which should provide a high wear protection.
  • These wear protection elements are made of carbide. They can be attached by gluing, stapling or soldering directly in the circumferential ring shoulders.
  • the wear layer of the press roll has substantially planar zones of a highly wear-resistant material, the z. B. tiles or tiles can be formed. The spaces between the highly wear-resistant zones are filled with a material of other wear resistance.
  • the tiles or tiles can z. B. made of a metal matrix composite material by hot isostatic pressing. These prefabricated hard bodies are then permanently attached to the base body together with the interspace material by hot isostatic pressing.
  • the stud bolts each composed of a radially inner with the roller surface well weldable bolt part and from a radially inner bolt part protective covering radially outer harder bolt part.
  • the outer bolt part consists of hard materials and is firmly bonded to the radially inner bolt part.
  • the radially outer bolt part may be made of hard metal and / or ceramic material and / or made of hardwelding materials.
  • the technical problem underlying a press roll for a roller press to create which is characterized by a particularly resistant, yet replaceable wear protection on the roll edges.
  • Metal matrix composite means a material in which hard particles are incorporated into a (continuous) metallic matrix, wherein the hard particles are preferably arranged by the (contiguous) metallic matrix separated from each other within the composite material.
  • Such edge protection elements made of a metal matrix composite material are preferably produced by sintering and / or hot isostatic pressing.
  • the powdery components for the hard particles on the one hand and the metal matrix on the other hand are first mixed and then heated, in the case of hot isostatic pressing under high pressure. In this way, the powdery components combine with each other at high temperatures and in the case of hot isostatic pressing at high pressure.
  • the non-metallic hard particles are uniformly distributed and in each case surrounded by the metallic material of the metal matrix.
  • the metal matrix composite materials therefore differ, inter alia, by the relatively low proportion of hard particles. While in hard metals hard materials with a volume fraction of about 80% to 96% are mixed with a metallic binder as a toughness component, the metal matrix composites are characterized by a significantly lower proportion of hard material particles, so that they are embedded separately in a continuous metal matrix are. Incidentally, the hard particles of the metal matrix composite materials are significantly larger than the hard particles of hard metals.
  • a metal matrix composite material in which hard particles having a size of more than 20 microns, z. B. more than 40 microns, preferably more than 60 microns, but not more than 1000 microns and are used with a volume fraction of less than 50%, preferably less than 40%, which are embedded (discontinuously) in a (contiguous) metallic matrix.
  • the volume fractions in the (pressed) hard body are meant.
  • metal matrix composite materials with hard particles from the group of nitrides and oxides can be used.
  • metal matrix composite materials with hard particles of hard metal for the edge protection elements. That is, in these metal matrix composites, carbide hard particles of the above-described dimension having the volume fraction described above are embedded in a metallic matrix.
  • edge protection elements made of hard metal but edge protection elements of a metal matrix composite material, in which only the hard particles and consequently only the reinforcement phase consists of hard metal.
  • the invention is based on the recognition that excellent wear protection can be realized in the edge regions of the roller press if the edge protection elements are made completely or partially from such a metal matrix composite material.
  • a metal matrix composite material is less brittle than hard metal and more resistant to bending with a suitable choice of the material.
  • the wear of the metal matrix composites is "adjustable" within certain limits, so that metal matrix composites can be used with a wear that is suitably adapted to the (remaining) roll surface. This has the advantage that the Rolls retain their (cylindrical) shape during operation. Because during operation of the roller press there is the problem that the pressure at the edge of the rollers is usually lower than in the middle of the roll.
  • edge protection elements made of hard metal there is the fundamental problem that they wear out more slowly on the edge (because of the low pressure).
  • the roll diameter in the center of the roll is reduced relative to the diameter at the roll edges, so that a roll with as it were "concave" geometry is formed. In extreme cases, this can go so far that the material in the middle of the rolls does not undergo sufficient comminution.
  • edge protection elements according to the invention made of MMC can be used basically in roll bodies which have recesses or annular shoulders running in the circumferential direction on one or both roll edges in a known manner, into which a plurality of edge protection elements are respectively inserted.
  • the edge protection elements can also be attached laterally to the end faces of the base body.
  • the edge protection elements of MMC according to the invention are preferably used in an embodiment in which the roll body has a plurality of pocket-like recesses distributed over the circumference and spaced apart in the circumferential direction or tangential direction on one or both roll edges, each being formed laterally and open at the top are, wherein in the individual pocket-like recesses only one MMC hard body is used as an exchangeable edge protection element.
  • the length of the pocket-like recesses and the length of the edge protection elements used in the circumferential direction is greater than the distance between two immediately adjacent recesses.
  • Such an embodiment with locally limited receiving pockets has the advantage over the solutions with circumferential annular shoulders that the individual edge protection elements, despite the very high pressing forces do not touch and therefore also can not abut each other or pressed against each other. Damage to the individual edge protection elements is thus avoided, and in particular also damage due to breakage, which in principle could occur with brittle hard materials.
  • the arrangement of the edge protection elements in individual, locally limited pockets moreover has the advantage that the edge protection elements are not only supported on a step-like shoulder on the underside and on the inside, but also laterally. Because the design of the roll edge with individual, locally limited pockets has the consequence that the individual recesses are delimited from each other by "dividers", so that the edge protection elements are supported tangentially by these dividers.
  • the embodiment with locally limited pockets has the advantage that in the region of the partitions and consequently in the area between the individual pockets and edge protection elements, an autogenous wear protection can be formed, which protects the edges of the wear protection elements used to a particular extent.
  • an autogenous wear protection can build up not only in the other roller areas, but also in the edge area and between the individual edge protection elements. This has the consequence that a auskolkender wear in these zones is avoided.
  • the invention comprises - as already described - alternatively but also the use of edge protection elements of MMC in circumferential annular shoulders or the like.
  • edge protection elements can have geometrically very different shapes.
  • edge protection elements are used, which in the plan view of the roll surface angular, z. B. are rectangular. It is within the scope of the invention that the edge protection elements in a side view of the roller angular, z. B. rectangular, so that the edge protection elements z. B. may have the shape of a cuboid.
  • edge protection elements are preferably used, the shape of which deviates from a cuboid.
  • the lateral recesses in the side view at least partially curved wall surfaces and have the edge protection elements at least partially have adapted to the curved wall area, curved outer contour.
  • the (partially) curved wall surface of the recess and the (partially) curved outer contour in cross-section circular arc or alternatively in cross-section parabolic or hyperbolic be formed.
  • the already described lateral or tangential support of the edge protection elements and thus the derivation of the compressive forces in the body can thereby optimize.
  • such pockets with curved wall areas particularly easy to bring into the body, z. B. by milling.
  • the edge protection elements are completely or partially made of a metal matrix composite material (MMC).
  • MMC metal matrix composite material
  • the edge protection elements may be formed as substantially homogeneous solid body, that is, they are then made entirely of MMC.
  • the edge protection elements may have a composite structure and for this purpose have a carrier element with a wear layer disposed thereon or thereto, wherein the carrier element consists of a ductile material with lower hardness than the wear layer.
  • the wear layer itself is again made of MMC.
  • MMC metal-organic chemical vapor deposition
  • Such an embodiment has the advantage that the carrier element made of a good material to be processed, for. B. made of steel, which in particular allows optimal attachment of the edge protection element on the roll body.
  • the wear layer of MMC then forms the wear protection.
  • This wear layer is preferably firmly connected to the carrier element in the course of the production of the edge protection elements, for. B. by sintering and / or hot isostatic pressing (HIP).
  • the wear layer can completely cover the carrier element on the top side. Alternatively, however, the wear layer may also be applied only locally limited to the carrier element or z. B. be introduced into a corresponding recess of the support element.
  • the edge protection elements are inventively releasably attached to the roller body, so that the edge protection elements are basically interchangeable. Such attachment succeeds z. B. by screwing.
  • the edge protection elements suitable openings, z. B. holes, through which corresponding fasteners, z. As screws, can be introduced into the roll body.
  • Such a configuration is particularly suitable when the edge protection element is a carrier element made of a ductile material, for. B. steel.
  • a positive connection of the edge protection elements be realized in the pockets, and z. B. by a "dovetail connection".
  • the edge protection elements can be equipped with (dovetail-like) form-fitting webs, which in corresponding negative forms, z. B. radial grooves of the roller engage.
  • the press roll may be formed as a solid roll, that is, the roll body is formed as a solid body.
  • the roller body can also have a base body and a bandage arranged thereon, so that the wear protection is then mounted on / on this bandage.
  • edge protection elements can be used which have an at least areawise widening in the direction of the roll center cross-section.
  • recesses are then also provided, which likewise have a cross-section, at least in regions, in the direction of the roller center.
  • edge protection elements are releasably secured to the roll body according to the invention.
  • Detachable means within the scope of the invention that they are non-destructive of the roller body, for. B. from the recesses, remove. Insofar connections are also covered by gluing or soldering, since these z. B. are soluble again by heating.
  • the invention relates not only to the described press roll itself, but in a preferred development also a roll press with two such press rolls.
  • a press roll 1 for a roll press in particular for the high-pressure comminution of brittle, mineral feed material, is shown.
  • the roller press usually consists of two press rollers, of which in the figures, however, only one is shown in the cutout.
  • Such a press roller 1 can - as shown in the figures - be formed as a solid roller, wherein the roller body 2 is then formed as a solid body.
  • the roller body 2 may also have a base body and a bandage surrounding it. This is not shown in the figures.
  • such a press roller 1 is equipped with a suitable wear protection, which can be configured in various ways.
  • the illustrations in the figures are limited to the wear protection measures in the region of the (frontal) roll edges.
  • a plurality of hard bodies are removably attached to one or both roll edges of the roll body 2 for the edge protection as exchangeable edge protection elements 5.
  • these edge protection elements 5 are completely or partially made of a metal matrix composite material (MMC).
  • the roller body 2 has at one or both roll edges a plurality of pocket-like recesses 3 distributed over the circumference and spaced apart in the circumferential direction or tangential direction T.
  • the individual pocket-like recesses 3 are separated from one another in the circumferential direction T by separating webs 4.
  • the recesses 3 are each open both laterally and above.
  • each a single hard body is used as an exchangeable edge protection element 5 releasably.
  • the figures show the press roll 1 while in a partially assembled state, ie some recesses 3 are shown for better understanding without inserted edge protection element.
  • the circumferential direction or the tangential direction T, the axial direction A and the radial direction R are in Fig. 1 shown.
  • the recesses 3 are open both laterally and upwardly.
  • Open at the side means in the context of the invention in the region of the end face of the roller open, ie open on the side facing away from the roller center in the axial direction A.
  • Open at the top means in the context of the invention on the side facing away from the roll axis in the radial direction R open.
  • the lengths L, I and the distance a refer to the tangential direction T of the roller, in the area of the outer upper edges of the edge protection elements.
  • the known circumferential annular shoulders on the roll edges is dispensed with. Rather, individual pocket-like recesses and consequently receiving pockets 3 are used, in each of which only a single edge protection element 5 is inserted.
  • the length L of the pocket-like recesses and also the length I of the edge protection elements 5 used according to the invention is greater than the distance a between two immediately adjacent recesses 3.
  • the lengths L, I and the distance a refer to the circumferential direction T of the roller.
  • the distance a between the individual pockets 3 thus corresponds to the thickness of the webs 4 arranged between the recesses 3 and consequently also between the edge protection elements 5, which are part of the roller body 2.
  • the pocket-like recesses 3 are in the roll body 2 z. B. introduced by machining.
  • the illustrated embodiments with the individual pockets 3 have the advantage that the individual edge protection elements 5, which are designed as hard bodies of MMC, do not abut each other and despite the large forces occurring can not be pressed against each other, so that damage to the edge protection elements can be avoided. Furthermore, the pressure forces that occur can be introduced into the roller body 2 without any problem by means of this embodiment. This is particularly true for the embodiment shown in the figures, in which the lateral recesses 3 in the side view curved wall surfaces 3a and have the edge protection elements 5 curved outer contours 5a, wherein the curved outer contour 5a is adapted to the curved wall surface 3a. In the embodiment of the Fig. 1 to 3 are both the curved wall surfaces 3a and the curved outer contour 5a each (partially) formed cylindrical.
  • Fig. 1 shows a first embodiment of the invention, in which the edge protection elements 5 are made homogeneously from one and the same material, namely from MMC.
  • the edge protection elements or hard body 5 MMC in the recesses without screws, z. B. by gluing or soldering attached.
  • Fig. 2 shows in an alternative embodiment edge protection elements 5, which have as a composite structure in each case a carrier element 5b and a wear layer 5c of MMC arranged thereon.
  • the carrier element 5b consists of a ductile material, for. Steel.
  • the carrier element 5b serves primarily to fasten the edge protection elements 5 in the recess 3, while the wear layer 5c determines the edge protection properties or wear properties.
  • the wear layer 5c is made of a metal matrix composite material. It is advantageous to fasten the wear layer 5c of MMC to the carrier element 5b by sintering and / or hot isostatic pressing.
  • Fig. 2 shows an embodiment in which the edge protection elements 5 are fastened by means of screws to the roller body 2.
  • the edge protection elements 5 therefore have suitable perforations 6 or bores through which the screws can be introduced into the roller body 2.
  • These holes 6 are arranged for the screws in the region of the support elements 5 and consequently in the region of the ductile material.
  • Fig. 3 shows an alternative embodiment in which the edge protection elements 5 are positively secured to the roller body 2, by means of a dovetail construction.
  • the edge protection elements 5 each have a mounting web 7 and in the roller body 2 are each arranged in the radial direction of grooves 8 in the region of the individual recesses 3, wherein both the mounting webs and the grooves 8 can be designed dovetailed.
  • Fig. 3 indicated that these elements can be formed as composite components with a wear layer 5c and a support member 5b, wherein the wear layer forms a wear insert 5c, which is introduced into prepared recesses of the support member 5b.
  • the edge protection elements 5 shown in the figures are formed by way of example rectangular in a plan view of the roller. In a side view of the end face of the roller edge protection elements 5 in the embodiment, however - as described - partially rounded.
  • the invention basically also includes embodiments in which the edge protection elements in a side view on the front page polygonal, z. B. rectangular, are formed so that then z. B. also cuboid edge protection elements can be realized. This is not shown in the figures.
  • edge protection elements alternatively or additionally on the top with a curved contour, so that in particular an adaptation to the radii of curvature of the roller takes place. This option is also not shown.
  • Fig. 4 and 5 show, moreover, highly simplified and schematically modified embodiments in which the recesses 3 and the edge protection elements 5 each have an at least partially widening in the direction of the roll center cross-section.
  • Fig. 4 shows an example of an embodiment, which the lower wall surface 3a of the recess and the corresponding outer contour 5a of the edge protection elements fall in an axial section from the roll edge in the direction of the roll center, so that an oblique lower edge is formed. This has the effect that the edge protection elements 5 are pressed securely into the recess 3 by the occurring pressing forces.
  • Such an embodiment can be realized in edge protection elements in various forms, for. B. also in the in the Fig. 1 to 3 illustrated edge protection elements.
  • Optional shows Fig. 5 the possibility that, alternatively or additionally, the recesses 3 and the edge protection elements 5 have a cross-section widening "laterally" in the direction of the roller center.
  • the measures after the Fig. 4 and 5 can also be combined with each other.
  • the edge protection elements 5 made of a metal matrix composite material (MMC).
  • MMC metal matrix composite material
  • the invention also includes embodiments in which the edge protection elements of MMC are used in circumferential annular shoulders, in which case z. B. at both roll edges in each case a circumferentially extending, (completely) circumferential recess is provided, in which the edge protection elements are used.
  • the edge protection elements made of MMC can also be attached laterally to the end faces of the roller body.

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  • Engineering & Computer Science (AREA)
  • Food Science & Technology (AREA)
  • Rolls And Other Rotary Bodies (AREA)
  • Crushing And Grinding (AREA)
  • Reduction Rolling/Reduction Stand/Operation Of Reduction Machine (AREA)
EP13708140.2A 2012-03-15 2013-03-06 Presswalze Revoked EP2825316B1 (de)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE102012102199A DE102012102199A1 (de) 2012-03-15 2012-03-15 Presswalze
PCT/EP2013/054512 WO2013135540A1 (de) 2012-03-15 2013-03-06 Presswalze

Publications (2)

Publication Number Publication Date
EP2825316A1 EP2825316A1 (de) 2015-01-21
EP2825316B1 true EP2825316B1 (de) 2017-04-26

Family

ID=47843274

Family Applications (1)

Application Number Title Priority Date Filing Date
EP13708140.2A Revoked EP2825316B1 (de) 2012-03-15 2013-03-06 Presswalze

Country Status (11)

Country Link
US (1) US20150083839A1 (ru)
EP (1) EP2825316B1 (ru)
CN (1) CN104284729B (ru)
AU (1) AU2013231534A1 (ru)
CA (1) CA2866949C (ru)
CL (1) CL2014002432A1 (ru)
DE (1) DE102012102199A1 (ru)
DK (1) DK2825316T3 (ru)
RU (1) RU2592853C2 (ru)
WO (1) WO2013135540A1 (ru)
ZA (1) ZA201407424B (ru)

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WO2015123772A1 (en) * 2014-02-19 2015-08-27 Cast Steel Products Lp, By Its General Partner Cast Steel Products Gp Ltd. Roller with replaceable edge reinforcements
DE102015207927A1 (de) * 2015-04-29 2016-11-03 Takraf Gmbh Seitenverschleißschutz für die Rolle einer Rollenpresse
DE102016200912A1 (de) * 2016-01-22 2017-07-27 Thyssenkrupp Ag Verschleißschutzelement für eine Zerkleinerungseinrichtung
RU199756U1 (ru) * 2020-01-30 2020-09-18 Общество с ограниченной ответственностью «Техноинком» Бандаж валка вертикальной валковой мельницы
CN115156540A (zh) * 2022-06-12 2022-10-11 华能国际电力股份有限公司营口电厂 一种金属陶瓷复合磨辊的制备方法
WO2024089672A1 (en) * 2022-10-28 2024-05-02 Flsmidth A/S Corner block segment for a roll of a comminution device
BE1031004B1 (de) * 2022-10-28 2024-06-04 Smidth As F L Eckblocksegment für eine Walze einer Zerkleinerungsvorrichtung

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DK2825316T3 (en) 2017-07-17
AU2013231534A1 (en) 2014-10-02
CL2014002432A1 (es) 2014-11-03
CA2866949A1 (en) 2013-09-19
US20150083839A1 (en) 2015-03-26
CA2866949C (en) 2016-11-29
RU2592853C2 (ru) 2016-07-27
WO2013135540A1 (de) 2013-09-19
CN104284729A (zh) 2015-01-14
EP2825316A1 (de) 2015-01-21
RU2014141358A (ru) 2016-05-10
CN104284729B (zh) 2017-03-08
DE102012102199A1 (de) 2013-09-19

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