AU2014365743B2

AU2014365743B2 - Grinding roll and method and device for processing a grinding roll

Info

Publication number: AU2014365743B2
Application number: AU2014365743A
Authority: AU
Inventors: Egbert Burchardt; Silvio Lorenz; Ralf Martens; Dirk Schefer; Heinz Schroeder
Original assignee: FLSmidth AS
Current assignee: FLSmidth AS
Priority date: 2013-12-19
Filing date: 2014-12-18
Publication date: 2019-04-11
Anticipated expiration: 2034-12-18
Also published as: AU2014365743A1; CA2933396A1; DE102013114516B4; WO2015090602A3; PE20161150A1; BR112016014233A2; WO2015090602A2; CL2016001562A1; BR112016014233B1; CA2933396C; ZA201603965B; DE102013114516A1

Abstract

The invention relates to a grinding roll (30) having: a main roll body (36), wherein the main roll body (36) has a plurality of wear protection elements (32) in the region of the roll ends, which are arranged in the circumferential direction, wherein each of the wear protection elements is connected to the main roll body (36) via a connection element (38), wherein the connection element (38) is designed such that it bonds the wear protection element to the main roll body. The invention further relates to a method for processing a grinding roll, wherein the method comprises: providing at least one wear protection element (32); providing a connection element (38) for connecting the at least one wear protection element (32) to the main roll body (36) and heating the connection element (38).

Description

GRINDING ROLLER AND METHOD AND APPARATUS FOR PROCESSING A GRINDING ROLLER

The invention relates to a grinding roller and to a method and an apparatus for processing a grinding roller.

Prior art

In the case of grinding rollers which are used in particular for high-pressure crushing of, for example, hard ore, a high level of wear of the grinding roller surface occurs during the operation of the grinding roller. To counteract said wear, it is known from EP-A-0 516 957 to apply additional wear protection elements to the surface of the grinding roller.

Aside from the wear of the grinding roller surfaces, additional wear of the grinding roller edges occurs, which is normally counteracted by way of wear protection elements applied to the roller edges. For maintenance purposes, it is necessary for said wear protection elements to be regularly exchanged, which results in a long standstill time of the grinding roller and entails production and maintenance costs.

Disclosure of the invention

It would be advantageous if embodiments of the present invention could provide a grinding roller which can be produced and maintained particularly economically, and to specify an inexpensive method for the processing of a grinding roller and an apparatus for carrying out such a method.

According to a first aspect, a grinding roller according to the invention comprises a roller main body, wherein the roller main body has, in the region ofthe roller ends, a multiplicity of wear protection elements which are arranged in a circumferential direction. Each ofthe wear protection elements is connected to the roller main body by way of a connecting element, wherein the connecting element is designed so as to connect the wear protection element cohesively to the roller main body. The roller main body has at least one recess running in a circumferential direction, and wherein multiple wear protection elements are arranged in each ofthe at least one recess. The at least one wear protection element has at least one connecting region which encompasses a surface region ofthe wear protection element, wherein the roller main body has at least one connecting region, and the connecting region ofthe wear protection element is connected by way ofthe connecting element to the connecting region of the roller main body, wherein the connecting region ofthe wear protection element and/or the connecting region ofthe roller main body is a substantially planar surface.

The arrangement of a connecting element which produces a cohesive connection between the wear protection element and the roller main body for the purposes of connecting the wear protection element to the roller main body offers the advantage of simple and inexpensive assembly and disassembly of wear protection elements, in particular in the end regions ofthe roller main body. In order to exchange the wear protection elements for maintenance purposes, it is merely the case that the roller main body and the wear protection element applied thereto are heated. In this way, the connecting element applied between the roller main body and the wear protection elements is likewise heated. As a result of the heating, the connecting element is for example liquefied, embrittled or incinerated, such that the connection between the wear protection element and the roller main body is released, whereby the wear protection element can be easily removed from the roller main body.

For the application of a wear protection element, for example during maintenance or during the production of the grinding roller, the connecting element is applied to the roller main body at the location at which the wear protection element is to be arranged. The connecting element is for example subsequently heated until it has reached a liquid state. The wear protection element is arranged on the liquid connecting element and subsequently, for example under ambient conditions, enters into a cohesive connection with the connecting element. It is likewise conceivable for the roller main body, and/or the wear protection element which is to be applied to the roller main body, to be heated in order to generate the cohesive connection.

The connecting region of the wear protection element is to be understood in particular to mean the region which is connected by way of the connecting element to the roller main body. For example, the connecting region of the wear protection element comprises a lateral surface running in a radial direction, and/or a surface running in a circumferential direction of the roller main body.

Furthermore, the connecting regions of at least one of roller main body and wear protection element are in particular of substantially planar form. A substantially planar, in particular straight surface has, for example, no cutouts, curvatures or projections.

This embodiment of the connecting regions offers a solution, which is simple and inexpensive in terms of manufacturing, for the production of the wear protection elements and of the roller main body. It is thus possible to dispense with the formation of bores in the roller main body.

It is for example the case that the wear protection elements project in a radial direction and/or in an axial direction from the surface of the roller main body. A projection of the wear protection elements in a radial direction from the roller main body ensures better wear protection of the roller main body surface; in particular, an arrangement of said type permits the realization of autogenous wear protection between adjacent wear protection elements in the inner region of the grinding roller surface.

The roller main body has at least one recess running in a circumferential direction, wherein multiple wear protection elements are arranged in the circumferential direction in each of the at least one recess. The recess is advantageously arranged on lateral end regions of the roller main body. An arrangement of the wear protection elements in a recess offers the advantage of an additional support surface on the roller main body, and improved positionability and thus a simplification of the production and maintenance process. The connecting regions of the roller main body preferably encompass the recess of the roller main body. A connecting region of the roller main body is for example formed from a region, extending in a circumferential direction or in a radial direction, of the roller main body.

In a further embodiment, at least one of the recesses extends over the entire circumference of the grinding roller. This simplifies the manufacture of the recess in the roller main body and the arrangement of the wear protection elements therein.

The connecting element may comprise a braze, in particular a metal alloy, which at least partially comprises elements of silver and/or copper and/or cadmium and/or zinc. Said materials of the connecting element are materials which can be liquefied in the presence of a supply of heat, and which are therefore particularly highly suitable for the connection of the wear protection elements to the roller main body. By way of a supply of heat, the braze is liquefied, such that the cohesive connection between the wear protection element and the roller main body is released. The connecting element may further comprise an adhesive, in particular a single-component or two-component adhesive. An adhesive is for example incinerated or embrittled by way of a supply of heat, such that a connection between the wear protection element and the roller main body is released.

At least one support element may further be provided, which is arranged so as to support the wear protection element at least in a radial direction.

In accordance with a second aspect of the present invention, there is provided a method for processing a grinding roller in accordance with the first aspect, the method comprising: rotatably mounting the roller main body on a holding device, providing at least one wear protection element; providing a connecting element for the connection of the at least one wear protection element to the roller main body, and heating the connecting element.

The advantages described with regard to the grinding roller apply, correspondingly in method terms, to the method for processing a grinding roller. Byway ofthe method described above, a grinding roller in accordance with the first, second, third and fourth aspects ofthe present invention can be produced. The method furthermore serves for the maintenance of a grinding roller of said type.

The wear protection elements are preferably arranged in a circumferential direction of the roller main body.

The at least one wear protection element has a connecting region which encompasses a surface region ofthe wear protection element, wherein the roller main body has at least one connecting region, wherein the connecting element is applied between the connecting region ofthe wear protection element and the connecting region ofthe roller main body. The connecting region ofthe wear protection element and/or the connecting region ofthe roller main body may for example be an approximately straight surface or of undulating form. Furthermore, the connecting region may be formed by at least one recess or may be formed such that the connecting region of the wear protection element comprises a projection and the connecting region of the roller main body comprises a cutout, wherein the projection of the connecting region of the wear protection element interacts with the cutout of the connecting region of the roller main body.

Furthermore, the method in accordance with the fifth aspect of the present invention may comprise hardening the connecting element for the purposes of connecting the at least one wear protection element to the roller main body. The hardening may for example be performed under ambient conditions, though it is also possible for hardening of the connecting element to be realized by way of a cooling device which additionally cools the connecting element. Hardening by light, or hardening by shade, with corresponding activators, would likewise be conceivable.

In one embodiment, the connection between the at least one wear protection element and the roller main body is released. In particular, the cohesive connection is released by heating the connecting element.

In one embodiment, the connecting element comprises a braze, in particular a metal alloy, or an adhesive. It is likewise conceivable to use an adhesive which is present in liquid form without additional action of heat, wherein it is for example the case that the adhesive hardens, for the purposes of connecting the wear protection element to the roller main body, under ambient conditions, and is liquefied, incinerated or embrittled as a result of subsequent heating.

In one embodiment, the step of heating comprises heating by way of at least one of the following: a flame, a laser, a brazing torch, hot air, ultrasound, an electron beam, an electric arc, or induction heating. Said means for heating have the advantage that they permit local heating of the roller main body and of the wear protection element, whereby it is possible for the connecting element to be heated in targeted fashion, and thus for a liquefaction of the connecting element to be ensured.

The step of heating furthermore may comprise heating to a temperature of at least 300°C, in particular at least 550°C, most preferably greater than 650°C. At such a temperature, a cohesive connection between the connecting element and the roller main body and the wear protection element is ensured.

In one embodiment, the roller main body is rotatably mounted or placed on a holding device, whereby it is made possible for the heating of the connecting element, which is in particular arranged over the entire circumference of the roller main body, to be performed more easily. A holding device of said type is for example a rotatable plate, in particular a disk, on which the roller main body lies for the purposes of processing. A holding device of said type permits a simple arrangement of the connecting elements and of the wear protection elements on the roller main body, wherein the wear protection elements are braced with the at least one connecting element on the roller main body, for example in their final position, and the cohesive connection between the roller main body and the wear protection element is produced for example by virtue of the connecting element being heated.

In accordance with a third aspect of the present invention, there is provided an apparatus for processing a grinding roller having a roller main body and having at least one wear protection element which is designed such that it can be arranged in the circumferential direction of the roller main body, wherein each of the wear protection elements can be cohesively connected to the roller main body by way of a connecting element, wherein the apparatus has a holding device for rotatably holding the grinding roller and a heating device for heating the connecting element.

The apparatus may furthermore have a device for applying the connecting element to the roller main body and to the at least one wear protection element.

In a further embodiment, the apparatus comprises a cooling device for cooling the connecting element and/or the wear protection element.

In a further embodiment, the apparatus furthermore comprises means for the arrangement of the at least one connecting element and/or the at least one wear protection element on the roller main body. The means is for example designed such that it holds the connecting element and/or the wear protection element on the roller main body at the position in which the connecting element and/or the wear protection element are/is to be applied. A means of said type makes it possible for the connecting elements and/or the wear protection elements to be applied to the roller main body before, in a subsequent step, the connecting element is heated and a cohesive connection is produced between the wear protection element and the roller main body. The means furthermore prevents slippage ofthe wear protection elements on the roller main body during the course ofthe processing.

The processing apparatus may furthermore be movable relative to the roller main body. It is furthermore possible for the heating device and the cooling device to be arranged on the processing device and for these to be attached movably to the processing device, such that an optimum orientation ofthe heating device and/or of the cooling device is achieved, wherein the heating device and/or the cooling device are arranged on the processing device such that they cool and/or heat only at least one ofthe connecting elements. In particular, the heating device and/or the cooling device may be movable relative to the roller main body.

The heating and the cooling of the connecting element may be controlled/regulated by way of a control device, such that the heating and the cooling are performed in a time-dependent manner, and thus optimum heating and cooling are realized.

It is also possible for multiple heating and/or cooling devices to be attached to a processing device, such that in particular, both end regions of the grinding roller are heated and/or cooled simultaneously.

Preferred exemplary embodiments of the invention

The invention will be discussed in more detail below on the basis of multiple exemplary embodiments that will now be described, by way of example only, with reference to the appended figures in which:

Figure 1 is a schematic illustration of a roller mill;

Figure 2 is a schematic illustration of a plan view of a grinding roller in the region of one roller end;

Figure 3 is a schematic illustration of a cross section of an end region of a grinding roller according to an exemplary embodiment;

Figure 4 to figure 12 and figures 15 and 16 are schematic illustrations of a cross section of an end region of a grinding roller according to further exemplary embodiments;

Figure 13 shows a cross section of a device for processing a grinding roller; and

Figure 14 shows a plan view of the apparatus for processing a grinding roller as per figure 13, with a processing device.

Figure 1 schematically illustrates a roller mill 10. The roller mill 10 is composed of two grinding rollers 12, 14, which are illustrated schematically as circles and which have the same diameter and are arranged adjacent to one another. Between the grinding rollers 12, 14 there is situated a grinding gap, which is for example adjustable in size.

During the operation of the roller mill, the grinding rollers 12, 14 rotate oppositely to one another in the rotation directions 18, 20, wherein material for grinding passes through the grinding gap in the falling direction 16 and is ground.

Figure 2 shows an end region of a grinding roller 24 which has a roller main body 22, to which wear protection elements 26 are applied. The wear protection elements 26 are applied in an inner surface region of the grinding roller which does not include the end of the grinding roller. By way of example, figure 2 shows ten wear protection elements 26 which are arranged in two rows so as to be spaced apart from one another and adjacent to one another and which have a circular cross section. It is likewise conceivable for the wear protection elements to vary in size, in number, in cross sectional shape and in arrangement relative to one another over the surface of the grinding roller, for example in order to compensate for local differences in wear during the operation of the grinding roller 24.

Furthermore, the grinding roller 24 has wear protection elements 28 applied to the end of the grinding roller 24, which wear protection elements, by way of example, have a rectangular cross section and are arranged adjacent to one another in a row such that they form a ring around the circumference of the grinding roller 24. Further cross-sectional shapes of the wear protection elements 28 which differ from the cross-sectional shape shown in figure 2 are also conceivable. An arrangement of the wear protection elements 28 so as to be spaced apart from one another is also possible. Figure 2 shows, by way of example, only the left-hand end of the grinding roller 24, wherein the right-hand end, which is not shown, is advantageously of identical construction.

Figure 3 schematically shows a cross section of a detail of an end region of a grinding roller 30. The grinding roller 30 has, by way of example, three wear protection elements 34 which are of cylindrical form and which are applied in an inner surface region of the grinding roller 30 which does not include the end of the grinding roller. The wear protection elements are arranged in in each case one recess in the roller main body 36 of the grinding roller, wherein an upper region of the wear protection elements 34 projects out of the roller main body 36. The wear protection elements, which are arranged adjacent to one another, are spaced apart from one another such that, during the operation of the grinding roller 30, an autogenous wear protection layer is formed between adjacent wear protection elements 34. The design and arrangement of the wear protection elements 34 in the inner surface region of the grinding roller 30 in figure 3 corresponds to that in figures 4 to 6.

Furthermore, the grinding roller 30 in figure 3 has a wear protection element 32 which is arranged in a recess on the roller end. The wear protection element 32 terminates flush with the outer side of the grinding roller main body 36 and projects by way of its upper side from the grinding surface of the grinding roller main body 36, such that, during the operation of the grinding roller, it is preferably the case that an autogenous wear protection zone forms between the wear protection element 32 and the adjacent wear protection element 34. Figure 3 furthermore shows a connecting element 38 which is applied between the wear protection element 32 and the roller main body 36. The connecting element is applied over the entire surface of the recess in the roller main body 36 in which the wear protection element is arranged, such that the wear protection element 32 is connected to the roller main body 36 exclusively by way of the connecting element 38. The wear protection element 32 and the roller main body 36 each have two connecting regions to which the connecting element 38 is applied. Below, the lower region of the connecting element is to be understood to mean the radially inwardly arranged surface region of the connecting element.

Figure 4 shows a grinding roller 40 with a wear protection element 42 on the end of the roller main body 48, which wear protection element has, by way of example, a square cross section and is applied to the side surface on the end of the roller main body. The wear protection element 42 projects in a radial direction from the surface of the roller main body and in an axial direction from the side surface of the roller main body. The grinding roller 40 furthermore has, between the side surface of the roller main body and the wear protection element 42, a connecting element 46 which connects the roller main body to the wear protection element 42. In the radial direction there is also arranged a support element 44, which is illustrated as being rectangular and which is applied by way of its long side to the side surface of the roller main body 48 and which bears by way of its top side against the wear protection element 42 and supports the latter in a radial direction.

Figure 5 shows a grinding roller 50 according to a further exemplary embodiment, wherein the grinding roller 50 has, on the end of the roller main body 58, a wear protection element 52 which has a five-cornered cross section and which is arranged in a recess on the end of the roller main body 58 in such a way as to project both in a radial direction and in an axial direction from the roller main body. The axial projection of the wear protection element 52 from the roller main body 58 is supported in a radial direction by a support element 54, wherein the cross section ofthe wear protection element 52 narrows in the direction ofthe support surface between the wear protection element 52 and the support element 54. Furthermore, the grinding roller 50 has a connecting element 56 which is arranged within the recess in the roller main body 58 and which connects the roller main body 58 to the wear protection element 52.

Figure 6 shows a grinding roller 60 according to a further exemplary embodiment, having a wear protection element 62 which is arranged on the end ofthe roller main body 68 and which has a wedge-shaped cross section and which is arranged in a likewise wedge-shaped recess in the roller main body 68. Between the roller main body 68 and the wear protection element 62 there is applied a connecting element 66, such that the wear protection element 62 is connected to the roller main body 68 only by way of the connecting element 66.

Figure 7 shows a wear protection element 70 with an exemplary rectangular cross section, which wear protection element is arranged in a recess in a roller main body 74 and which terminates flush with the roller main body 74. The wear protection element 70 has, on its sides pointing toward the roller main body, in each case one projection 76, wherein a cutout 78 is arranged in the roller main body. Between the recess 78 and the projection 76 there is applied a connecting element 72 which connects the roller main body 74 to the wear protection element 70. It is also conceivable that, at those edges outside the cutout 78 and the projection 76 at which the roller main body 74 and the wear protection element 70 make contact, there is likewise applied a connecting element for the purposes of connecting said elements.

The wear protection element 80 shown in figure 8 is, as in figure 7, arranged in a recess of the roller main body and has a lower undulating surface 82, wherein a connecting element 84 is applied between the undulating surface 82 and the roller main body. It is likewise conceivable for both surfaces of the wear protection element 80 that are connected to the roller main body to be of undulating form in order to realize a stronger connection of the roller main body to the wear protection element 80 by way of the connecting element 84. Furthermore, it is also possible for the roller main body to have undulating surfaces.

Figure 9 shows a wear protection element 86 which is arranged, as per figure 7, on the roller main body 88, wherein the roller main body 88 has, in the recess, on each of the surfaces that are connected to the wear protection element 86, a recess 90 in which there is arranged a connecting element 92 for connecting the roller main body 88 to the wear protection element 86.

In figure 10, the wear protection element 94 is equipped, on each of the surfaces that are connected to the roller main body 96, with a respective recess 98 in which there is arranged a connecting element 100 for connecting the roller main body 96 to the wear protection element 94.

Figure 11 and figure 12 show a wear protection element 102, wherein a connecting element 104, 106 is applied to in each case only one surface which is connected to the roller main body.

Figure 15 shows a wear protection element 120 which is applied, by way of a connecting element 122, to a roller main body 124. The lower region of the connecting element 120, and that region ofthe roller main body 124 which is connected thereto, have a toothed profile. Figure 16 shows a wear protection element 126 which is applied, by way of a connecting element 128, to a roller main body 130, wherein the lower region ofthe connecting element 126, and that region ofthe roller main body 130 which is connected thereto, have an undulating profile.

The connecting element 38, 44, 56, 66, 72, 84, 92, 102 described with reference to figures 3 to 12 and figures 15 and 16 is for example a braze, composed in particular of a metal alloy, which at least partially comprises elements of silver and/or copper and/or cadmium and/or zinc.

Furthermore, the connecting element 38, 44, 56, 66, 72, 84, 92, 102 may be an adhesive, in particular a single-component or two-component adhesive.

Figure 13 shows a cross section of an apparatus 112 for processing a grinding roller, having a holding device 110 which, in figure 13, is illustrated schematically as two vertically running struts. Arranged between the two struts is a grinding roller 108, which is mounted, so as to be rotatable about its longitudinal axis, in the holding device 110.

Figure 14 shows a plan view ofthe device for processing a grinding roller. In figure 14, the wear protection elements 118 on the end regions ofthe grinding roller 108, and an encircling recess in which the wear protection elements are arranged, are additionally illustrated. In the illustration, byway of example, the recesses at the ends ofthe grinding roller 108 are not equipped with wear protection elements 118 over their entire areas. The apparatus 112 illustrated in figure 14 furthermore comprises a processing device 114, which is illustrated schematically as being rectangular and extending in an axial direction along the entire length of the grinding roller. The processing station 114 furthermore has a heating device 116, which is arranged on the processing station 114 so as to be situated opposite the wear protection elements 118 ofthe grinding roller 108. The heating device may for example be fastened to the processing device 114 so as to be movable within the processing device 114. Furthermore, in figure 14, a further heating device 116 at the right-hand end region of the grinding roller 108 in figure 14 is illustrated, as being optional, by way of dashed lines. It is furthermore possible for a further processing device 114 to be arranged, opposite the processing device 114 shown, on the other side of the grinding roller 108, as illustrated byway of dashed lines in figure 14.

During the operation of the apparatus, it is for example the case that a roller main body of a grinding roller 108 without wear protection elements is, in the end regions of the roller main body, fastened rotatably in the holding apparatus. A connecting element 38, 44, 56, 66, 72, 84, 92, 102, for example a braze material or an adhesive, is applied to the roller main body in the region in which a wear protection element is to be fastened. In the example shown in figure 14, the connecting element 38, 44, 56, 66, 72, 84, 92, 102 is applied into the recesses at the ends of the roller main body.

The roller main body and the wear protection element to be fastened to the roller main body is heated, for example by way of the heating device 116 of the processing device 114. The heating causes the connecting element, in particular the braze, to be liquefied. The heating device 116 may for example be a flame, a laser, a brazing torch, a hot-air apparatus, an ultrasound apparatus, an electron beam apparatus, or an induction heating device. In a subsequent step, the wear protection element is positioned on the roller main body and on the connecting element. The liquid connecting element hardens for example under ambient conditions, wherein a connection, in particular a cohesive connection, is formed between the roller main body and the wear protection element.

It is also conceivable for a cooling device for cooling the connecting elements to additionally be arranged on the processing station in order to expedite the hardening of the connecting element.

In a further exemplary embodiment, the wear protection element is positioned together with the connecting element, in particular a braze, on the roller main body and is subsequently heated byway of the heating device, such that the in particular cohesive connection between the roller main body and the wear protection element is formed.

It is furthermore advantageous for the heating device 116 and an additional cooling device to be arranged on the processing device 114 such that temporally offset heating/cooling of a connecting element, or parallel processing of different connecting elements, is made possible.

In the claims which follow and in the preceding description of the invention, except where the context requires otherwise due to express language or necessary implication, the word “comprise” or variations such as “comprises” or “comprising” is used in an inclusive sense, i.e. to specify the presence of the stated features in various embodiments of the invention.

Modifications and variations as would be apparent to a skilled addressee are determined to be within the scope of the present invention.

It is also to be understood that, if any prior art publication is referred to herein, such reference does not constitute an admission that the publication forms a part of the common general knowledge in the art, in Australia or any other country.

List of reference numerals 10 Roller mill 12 Grinding roller 14 Grinding roller 16 Falling direction 18 Rotation direction 20 Rotation direction 22 Roller main body 24 Grinding roller 26 Wear protection elements 28 Wear protection elements 30 Grinding roller 32 Wear protection element 34 Wear protection elements 36 Roller main body 38 Connecting element 40 Grinding roller 42 Wear protection element 44 Support element 46 Connecting element 48 Roller main body 50 Grinding roller 52 Wear protection element 54 Support element 56 Connecting element 58 Roller main body 60 Grinding roller 62 Wear protection element 66 Connecting element 68 Roller main body 70 Wear protection element 72 Connecting element 74 Roller main body 76 Projection 78 Recess 80 Wear protection element 82 Undulating surface 84 Connecting element 86 Wear protection element 88 Roller main body 90 Recess 92 Connecting element 94 Wear protection element 96 Roller main body 98 Recess 100 Connecting element 102 Wear protection element 104 Connecting element 106 Connecting element 108 Grinding roller 110 Holding device 112 Apparatus for processing 114 Processing device 116 Heating device 118 Wear protection elements 120 Wear protection element 122 Connecting element 124 Roller main body 126 Wear protection element 128 Connecting element 130 Roller main body

Claims

Claims

1. A grinding roller having: a roller main body, having in the region of the roller ends; and a multiplicity of wear protection elements; wherein the roller main body has at least one recess running in a circumferential direction, and wherein the multiplicity of the wear protection elements is arranged in the at least one recess, the at least one recess extending around an entire circumference of the roller main body without cut-outs and forming a series of connecting regions of the roller main body; wherein each of the wear protection elements is connected to the roller main body by way of a connecting element; wherein each connecting element is designed so as to connect one of the wear protection element cohesively to a respective connecting region of the roller main body; wherein each wear protection element has at least one connecting region which encompasses a surface region of the wear protection element; and wherein the connecting region of each wear protection element and the connecting regions of the roller main body are a substantially planar surfaces.
2. The grinding roller as claimed in claim 1, wherein the connecting element comprises a braze, in particular a metal alloy, which comprises elements of silver and/or copper and/or cadmium and/or zinc, or wherein the connecting element comprises an adhesive, in particular a single-component or two-component adhesive.
3. The grinding roller as claimed in claim 1 or 2wherein furthermore, at least one support element is provided, which is arranged so as to support the wear protection element at least in a radial direction.
4. A method of processing a grinding roller as claimed in any one of the preceding claims, wherein the method comprises: rotatably mounting the roller main body on a holding device, providing a least one wear protection element; providing a connecting element for the cohesive connection of the at least one wear protection element to the roller main body, and heating the connecting element.
5. The method as claimed in claim 4, wherein the method furthermore comprises the step of hardening the connecting element for the purposes of connecting the at least one wear protection element to the roller main body.
6. The method as claimed in claim 4 or 5, wherein the method furthermore has the step of releasing the connection between the at least one wear protection element and the roller main body.
7. The method as claimed in any one of claims 4 to 6, wherein the step of heating comprises heating by way of at least one of the following: a flame, a laser, a brazing torch, hot air, ultrasound, an electron beam, an electric arc, or induction heating.
8. An apparatus when used for processing the grinding roller as claimed in any one of claims 1 to 3, wherein the apparatus comprises: a holding device for rotatably holding the grinding roller, anda heating device for heating the connecting element.
9. The apparatus as claimed in claim 8, wherein the apparatus furthermore has a cooling device for cooling the connecting element and/or the wear protection element.
10. The apparatus as claimed in claim 8 or 9, wherein the apparatus furthermore comprises means for the arrangement of the at least one connecting element and/or of the at least one wear protection element on the roller main body.
11. The apparatus as claimed in any one of claims 8 to 10, wherein the heating device and/or the cooling device is movable.