CA3079295A1 - Crushing roll of a roll crusher and method for producing a crushing roll - Google Patents
Crushing roll of a roll crusher and method for producing a crushing roll Download PDFInfo
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- CA3079295A1 CA3079295A1 CA3079295A CA3079295A CA3079295A1 CA 3079295 A1 CA3079295 A1 CA 3079295A1 CA 3079295 A CA3079295 A CA 3079295A CA 3079295 A CA3079295 A CA 3079295A CA 3079295 A1 CA3079295 A1 CA 3079295A1
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- crushing
- roll
- wear
- wear insert
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- 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
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- Crushing And Pulverization Processes (AREA)
Abstract
Disclosed is a crushing roll of a roll crusher having a plurality of crushing plates which form the lateral surface of the crushing roll and a plurality of crushing tools attached to a crushing plate in each case, wherein at least one crushing plate is formed from a metal matrix composite material which has an anti-wear insert made of a hard metal and/or made of ceramic.
Also disclosed is a method for producing a crushing roll of a roll crusher, wherein the crushing roll has a plurality of crushing plates which form the lateral surface of the crushing roll and the method comprises the steps:
- positioning an anti-wear insert made of a hard metal and/or ceramic in a casting mold for casting a crushing plate of the crushing roll and - casting the crushing plate from a metal matrix material, so that the anti-wear insert is at least partially enclosed by the metal matrix material.
Also disclosed is a method for producing a crushing roll of a roll crusher, wherein the crushing roll has a plurality of crushing plates which form the lateral surface of the crushing roll and the method comprises the steps:
- positioning an anti-wear insert made of a hard metal and/or ceramic in a casting mold for casting a crushing plate of the crushing roll and - casting the crushing plate from a metal matrix material, so that the anti-wear insert is at least partially enclosed by the metal matrix material.
Description
CRUSHING ROLL OF A ROLL CRUSHER AND METHOD FOR PRODUCING A
CRUSHING ROLL
The invention relates to a crushing roll of a roll crusher having a plurality of crushing plates and a method for producing a crushing roll of this kind.
Crushers, in particular roll crushers, are customarily used for the crushing of materials such as limestone, oil shale, marl, clay, oil sand, or similar mineral materials. Roll crushers known in the art comprise two crushing rolls which rotate in opposite directions to one another and form a crushing gap between the crushing rolls. The crushing rolls are commonly formed from a plurality of crushing plates which are arranged alongside one another circumferentially to form a crushing roll. The crushing plates of the crushing rolls have crushing tools such as impact bars, hammers or crushing teeth, which are evenly spaced in respect of one another. The crushing tools and the surface of the crushing rolls of a roll crusher are exposed to a high degree of wear and therefore have to be regularly replaced. A crushing tool of this kind is known from DE4123967A1, for example.
In order to counteract wear to the crushing tools and to the surface of the crushing plates, it is known in the art for a hard metal layer, for example tungsten carbide, to be soldered or welded onto the crushing tools or crushing plates formed from relatively soft steel, for example. An anti-wear layer of this kind normally has a thickness of maximum 6 mm, the application of a thicker layer being technically impossible. Wear to the anti-wear layer applied to the crushing tool or the crushing plate involves the relatively soft steel of the crushing tool or the crushing plate being exposed to wear, so that it wears very quickly, frequently resulting in damage to, and a breakdown of, the roll crusher.
Based on the above, the problem addressed by the present invention is that of providing a crushing roll with a crushing plate which exhibits low wear, wherein a frequent replacement of the crushing tools or the crushing plates is avoided. At the same time, a problem addressed is that of providing the simplest and most cost-effectively producible crushing roll possible.
Date Recue/Date Received 2020-04-16 This problem is solved in accordance with the invention by a device having the features of the independent device claim 1 and by a method having the features of the independent method claim 11. Advantageous developments result from the dependent claims.
According to a first aspect, a crushing roll of a roll crusher for crushing mineral material comprises a plurality of crushing plates which form the lateral surface of the crushing roll. A
plurality of crushing tools is attached to each crushing plate. The at least one crushing plate is formed from a metal matrix composite material which has an anti-wear insert made of a hard metal and/or made of ceramic.
A roll crusher preferably comprises two crushing rolls rotating in opposite directions which are arranged alongside one another. A grinding gap is formed between the crushing rolls in which material such as limestone, marl, clay, oil shale or oil sand, for example, is crushed. Each crushing roll is formed from a plurality of crushing plates which are each partially ring-shaped, for example, and are arranged alongside one another circumferentially to form a crushing roll and are connected to one another, so that the crushing plates form the surface of the crushing roll. The crushing plates are preferably arranged about a drive shaft and fastened thereto. A
plurality of crushing tools is fastened to each crushing plate and these are used to crush the material.
The crushing tool is an impact bar, a crushing tooth or a baffle element such as a hammer of a hammer crusher, for example. The crushing tool is particularly attached to a crushing roll of a roll crusher, wherein the crushing roll has a plurality of recesses in its surface, for example, in which a crushing tool is attached in each case.
The material being crushed is mineral crushing material, for example, such as oil sand, coal and ores like iron ore and nickel ore or also cement clinker, for example.
A metal matrix composite material should be understood to mean a material made of a metal matrix material such as steel, for example, in which the anti-wear insert is cast from a hard metal and/or from ceramic. The anti-wear insert is particularly formed from a more wear-resistant material than the metal matrix material.
CRUSHING ROLL
The invention relates to a crushing roll of a roll crusher having a plurality of crushing plates and a method for producing a crushing roll of this kind.
Crushers, in particular roll crushers, are customarily used for the crushing of materials such as limestone, oil shale, marl, clay, oil sand, or similar mineral materials. Roll crushers known in the art comprise two crushing rolls which rotate in opposite directions to one another and form a crushing gap between the crushing rolls. The crushing rolls are commonly formed from a plurality of crushing plates which are arranged alongside one another circumferentially to form a crushing roll. The crushing plates of the crushing rolls have crushing tools such as impact bars, hammers or crushing teeth, which are evenly spaced in respect of one another. The crushing tools and the surface of the crushing rolls of a roll crusher are exposed to a high degree of wear and therefore have to be regularly replaced. A crushing tool of this kind is known from DE4123967A1, for example.
In order to counteract wear to the crushing tools and to the surface of the crushing plates, it is known in the art for a hard metal layer, for example tungsten carbide, to be soldered or welded onto the crushing tools or crushing plates formed from relatively soft steel, for example. An anti-wear layer of this kind normally has a thickness of maximum 6 mm, the application of a thicker layer being technically impossible. Wear to the anti-wear layer applied to the crushing tool or the crushing plate involves the relatively soft steel of the crushing tool or the crushing plate being exposed to wear, so that it wears very quickly, frequently resulting in damage to, and a breakdown of, the roll crusher.
Based on the above, the problem addressed by the present invention is that of providing a crushing roll with a crushing plate which exhibits low wear, wherein a frequent replacement of the crushing tools or the crushing plates is avoided. At the same time, a problem addressed is that of providing the simplest and most cost-effectively producible crushing roll possible.
Date Recue/Date Received 2020-04-16 This problem is solved in accordance with the invention by a device having the features of the independent device claim 1 and by a method having the features of the independent method claim 11. Advantageous developments result from the dependent claims.
According to a first aspect, a crushing roll of a roll crusher for crushing mineral material comprises a plurality of crushing plates which form the lateral surface of the crushing roll. A
plurality of crushing tools is attached to each crushing plate. The at least one crushing plate is formed from a metal matrix composite material which has an anti-wear insert made of a hard metal and/or made of ceramic.
A roll crusher preferably comprises two crushing rolls rotating in opposite directions which are arranged alongside one another. A grinding gap is formed between the crushing rolls in which material such as limestone, marl, clay, oil shale or oil sand, for example, is crushed. Each crushing roll is formed from a plurality of crushing plates which are each partially ring-shaped, for example, and are arranged alongside one another circumferentially to form a crushing roll and are connected to one another, so that the crushing plates form the surface of the crushing roll. The crushing plates are preferably arranged about a drive shaft and fastened thereto. A
plurality of crushing tools is fastened to each crushing plate and these are used to crush the material.
The crushing tool is an impact bar, a crushing tooth or a baffle element such as a hammer of a hammer crusher, for example. The crushing tool is particularly attached to a crushing roll of a roll crusher, wherein the crushing roll has a plurality of recesses in its surface, for example, in which a crushing tool is attached in each case.
The material being crushed is mineral crushing material, for example, such as oil sand, coal and ores like iron ore and nickel ore or also cement clinker, for example.
A metal matrix composite material should be understood to mean a material made of a metal matrix material such as steel, for example, in which the anti-wear insert is cast from a hard metal and/or from ceramic. The anti-wear insert is particularly formed from a more wear-resistant material than the metal matrix material.
2 Date Recue/Date Received 2020-04-16 The crushing plate is preferably formed, in particular cast, from the metal matrix composite material in one piece. A metal matrix composite material having an anti-wear insert made of a hard metal and/or made of ceramic offers the advantage of high wear resistance of the crushing plate. Furthermore, production of the crushing plates from the metal matrix composite material is comparatively simple and cost-effective, wherein the anti-wear insert can be positioned in the region of the crushing plate at which the greatest wear is to be expected.
According to a first embodiment, each crushing plate has a plurality of anti-wear inserts. In particular, the anti-wear inserts are identically configured and are arranged alongside one another in such a manner that they form the surface of the crushing plate, at least in part. The anti-wear inserts are preferably plate-shaped in design. Plate-shaped anti-wear inserts are particularly easy to produce and by arranging a plurality of anti-wear inserts of different sizes alongside one another, for example, almost any surface structure of the crushing plate can be formed.
The crushing plates are produced according to a further embodiment by a casting method. The anti-wear insert is preferably positioned in the casting mold for casting the crushing plates. The casting mold is then filled with the metal matrix material which encloses the anti-wear insert at least partially or completely. Casting the crushing plates offers a particularly simple production option for the crushing plates, allowing them to be produced in large quantities.
According to a further embodiment, the anti-wear insert comprises tungsten carbide, ceramic, titanium carbide, boron carbide, niobium carbide or chromium carbide, or a mixture of these materials. The anti-wear insert is preferably produced from a powder and/or granular mixture of the aforementioned materials, wherein the mixture is heated, in particular treated with gas, and baked. In particular, the mixture is heated in a flexible mold, for example, which corresponds to the negative mold of the anti-wear insert. The mixture is then cooled and heated to a porous structure. The anti-wear insert is formed in one piece and after the production process described above has been carried out it is positioned in the casting mold for production of the crushing plate. The metal matrix material is a high-temperature-resistant steel and/or a steel with a hardness of roughly 150 ¨ 400 HB (Brinell), for example. A high-temperature-resistant steel should be understood to mean a heat-resistant steel with a high chromium-nickel content which has a temperature resistance up to 650 C, in particular up to 1000 C.
According to a first embodiment, each crushing plate has a plurality of anti-wear inserts. In particular, the anti-wear inserts are identically configured and are arranged alongside one another in such a manner that they form the surface of the crushing plate, at least in part. The anti-wear inserts are preferably plate-shaped in design. Plate-shaped anti-wear inserts are particularly easy to produce and by arranging a plurality of anti-wear inserts of different sizes alongside one another, for example, almost any surface structure of the crushing plate can be formed.
The crushing plates are produced according to a further embodiment by a casting method. The anti-wear insert is preferably positioned in the casting mold for casting the crushing plates. The casting mold is then filled with the metal matrix material which encloses the anti-wear insert at least partially or completely. Casting the crushing plates offers a particularly simple production option for the crushing plates, allowing them to be produced in large quantities.
According to a further embodiment, the anti-wear insert comprises tungsten carbide, ceramic, titanium carbide, boron carbide, niobium carbide or chromium carbide, or a mixture of these materials. The anti-wear insert is preferably produced from a powder and/or granular mixture of the aforementioned materials, wherein the mixture is heated, in particular treated with gas, and baked. In particular, the mixture is heated in a flexible mold, for example, which corresponds to the negative mold of the anti-wear insert. The mixture is then cooled and heated to a porous structure. The anti-wear insert is formed in one piece and after the production process described above has been carried out it is positioned in the casting mold for production of the crushing plate. The metal matrix material is a high-temperature-resistant steel and/or a steel with a hardness of roughly 150 ¨ 400 HB (Brinell), for example. A high-temperature-resistant steel should be understood to mean a heat-resistant steel with a high chromium-nickel content which has a temperature resistance up to 650 C, in particular up to 1000 C.
3 Date Recue/Date Received 2020-04-16 The anti-wear insert according to a further embodiment is cast at least partially in a metal matrix material. The metal matrix material preferably infiltrates the porous structure of the anti-wear insert and encloses said anti-wear insert. The anti-wear inserts preferably have a thickness of 10¨ 200mm, in particular 20¨ 100mm, preferably 30¨ 50mm.
According to a further embodiment, at least one anti-wear insert is partially ring-shaped. This allows a circumferential arrangement of a plurality of anti-wear inserts alongside one another, so that the surface of the crushing plate is formed at least partially or completely by the anti-wear inserts.
The crushing roll according to a further embodiment has a mounting for receiving a crushing tool, wherein the mounting is formed from a metal matrix composite material which has an anti-wear insert made of a hard metal and/or made of ceramic. The mounting is preferably formed integrally with the crushing plate. It is likewise conceivable for the mounting to be bonded, welded, soldered or screwed to the crushing plate. The anti-wear insert is preferably attached to the surface of the mounting. In particular, the anti-wear insert is arranged on the outwardly facing side face of the mounting in the radial direction of the crushing roll.
The surface of the mounting is likewise exposed to a high degree of wear during operation of the roll crusher on account of the impact of the material being crushed. The formation of the mounting from a metal matrix composite material allows improved wear protection, particularly at those regions of the surface of the mountings which are exposed to severe wear.
According to a further embodiment, the crushing tool is formed from a metal matrix composite material which has an anti-wear insert made of a hard metal and/or made of ceramic. The crushing tool is preferably formed in one piece and is produced by a casting method. It is likewise conceivable for the crushing tool to have two segments, for example a fastening segment and a wear segment attached thereto, wherein the wear segment at least is formed from a metal matrix composite material. The wear segment forms the radially outer region of the crushing tool, wherein at least the tip encloses a wear insert.
The invention also comprises a method for producing a crushing roll of a roll crusher, wherein the crushing roll has a plurality of crushing plates which form the lateral surface of the crushing roll and the method comprises the steps:
According to a further embodiment, at least one anti-wear insert is partially ring-shaped. This allows a circumferential arrangement of a plurality of anti-wear inserts alongside one another, so that the surface of the crushing plate is formed at least partially or completely by the anti-wear inserts.
The crushing roll according to a further embodiment has a mounting for receiving a crushing tool, wherein the mounting is formed from a metal matrix composite material which has an anti-wear insert made of a hard metal and/or made of ceramic. The mounting is preferably formed integrally with the crushing plate. It is likewise conceivable for the mounting to be bonded, welded, soldered or screwed to the crushing plate. The anti-wear insert is preferably attached to the surface of the mounting. In particular, the anti-wear insert is arranged on the outwardly facing side face of the mounting in the radial direction of the crushing roll.
The surface of the mounting is likewise exposed to a high degree of wear during operation of the roll crusher on account of the impact of the material being crushed. The formation of the mounting from a metal matrix composite material allows improved wear protection, particularly at those regions of the surface of the mountings which are exposed to severe wear.
According to a further embodiment, the crushing tool is formed from a metal matrix composite material which has an anti-wear insert made of a hard metal and/or made of ceramic. The crushing tool is preferably formed in one piece and is produced by a casting method. It is likewise conceivable for the crushing tool to have two segments, for example a fastening segment and a wear segment attached thereto, wherein the wear segment at least is formed from a metal matrix composite material. The wear segment forms the radially outer region of the crushing tool, wherein at least the tip encloses a wear insert.
The invention also comprises a method for producing a crushing roll of a roll crusher, wherein the crushing roll has a plurality of crushing plates which form the lateral surface of the crushing roll and the method comprises the steps:
4 Date Recue/Date Received 2020-04-16 - positioning an anti-wear insert made of a hard metal and/or ceramic in a casting mold for casting a crushing plate of the crushing roll and - casting the crushing plate from a metal matrix material, so that the anti-wear insert is at least partially enclosed by the metal matrix material of the crushing plate.
The anti-wear insert is produced according to an embodiment, prior to positioning in the casting mold, from a powder and/or granular mixture of hard metal and/or ceramic by means of heating. The cooled anti-wear insert is then particularly fastened in the casting mold and enclosed by the metal matrix material.
Description of the drawings The invention is explained in greater detail below with the help of exemplary embodiments with reference to the attached figures.
Fig. 1 shows a roll crusher having two crushing rolls according to an exemplary embodiment.
Fig. 2 shows a schematic representation of a crushing plate having a plurality of crushing tools in a perspective view according to an exemplary embodiment.
Fig. 3 shows a schematic representation of the crushing plate according to Fig. 1 in a sectional view.
Fig. 4 shows a schematic representation of a crushing tool in a perspective view according to an exemplary embodiment.
Fig. 1 shows a roll crusher 11 having two crushing rolls 1 arranged alongside one another, wherein there is a crushing gap 26 between the crushing rolls 1 in which the material is crushed. The crushing rolls 1 each comprise a plurality of crushing plates 10 which form the surface of the crushing roll 1 and are arranged alongside one another circumferentially. By way of example, each of the crushing rolls 1 has six crushing plates 10. The crushing plates 10 each have a plurality of crushing tools 12 on their surface which are arranged circumferentially on the respective crushing roll 1 and are evenly spaced in respect of one
The anti-wear insert is produced according to an embodiment, prior to positioning in the casting mold, from a powder and/or granular mixture of hard metal and/or ceramic by means of heating. The cooled anti-wear insert is then particularly fastened in the casting mold and enclosed by the metal matrix material.
Description of the drawings The invention is explained in greater detail below with the help of exemplary embodiments with reference to the attached figures.
Fig. 1 shows a roll crusher having two crushing rolls according to an exemplary embodiment.
Fig. 2 shows a schematic representation of a crushing plate having a plurality of crushing tools in a perspective view according to an exemplary embodiment.
Fig. 3 shows a schematic representation of the crushing plate according to Fig. 1 in a sectional view.
Fig. 4 shows a schematic representation of a crushing tool in a perspective view according to an exemplary embodiment.
Fig. 1 shows a roll crusher 11 having two crushing rolls 1 arranged alongside one another, wherein there is a crushing gap 26 between the crushing rolls 1 in which the material is crushed. The crushing rolls 1 each comprise a plurality of crushing plates 10 which form the surface of the crushing roll 1 and are arranged alongside one another circumferentially. By way of example, each of the crushing rolls 1 has six crushing plates 10. The crushing plates 10 each have a plurality of crushing tools 12 on their surface which are arranged circumferentially on the respective crushing roll 1 and are evenly spaced in respect of one
5 Date Recue/Date Received 2020-04-16 another. A plurality of mountings 16 is arranged, in particular welded, screwed or integrally formed with the crushing plate 10, on the surface of the crushing plates 10, wherein a crushing tool 18 is fastened to each mounting 16. Each mounting 16 has a recess in which a crushing tool 18 is fastened in each case. The recesses in the mountings 16 are particularly arranged in such a manner that the crushing tools 12 are oriented at an angle of roughly 30-600 , preferably 45 , to the radial of the crushing roll 1. During operation of the roll crusher lithe crushing rolls 1 rotate in the direction of the arrow in opposite directions to one another. The material being crushed is delivered into the crushing gap 26 from above and crushed in said crushing gap 26.
Fig. 2 shows a crushing plate 10 having a plurality of crushing tools 18. The crushing plate 10 is, by way of example, partially ring-shaped and comprises eight crushing tools 18 which are attached to the surface of the crushing plate 10 in a manner offset from one another. For example, two crushing tools 18 in each case are arranged in the circumferential direction of the crushing roll alongside one another, so that four rows running in the circumferential direction and each comprising two crushing tools are arranged axially behind one another. The crushing tools 18 are fastened to the crushing plate 10 by means of a mounting 16 in each case. For example, the mountings 16 are integrally formed with the crushing plate 10 or connected to said crushing plate 10 in a substance-to-substance bonded manner, in particular welded. The circumference of the crushing plate 10 is strengthened over the width of the mountings 16, so that the diameter of the crushing roll is increased. The crushing plate 10 therefore has a step-shaped profile in the axial direction, the individual steps extending in the circumferential direction.
The crushing plate 10 is formed from a metal matrix composite material and comprises an anti-wear insert 14 and a metal matrix 12. The anti-wear insert 14 is preferably embedded at least partially in the metal matrix 12. For example, the crushing plate 10 in Fig. 2 comprises a plurality of anti-wear inserts 14 which are partially ring-shaped. The anti-wear inserts have a thickness of 10 ¨ 200mm, in particular 20 ¨ 100mm, preferably 30 ¨ 50mm, for example, are strip-shaped and arranged alongside one another in an axial direction. The crushing plate 10 in Fig. 2 has ten anti-wear inserts 14, for example, which each exhibit the same width and thickness, wherein the width corresponds to the width of a step, in particular to the width of a mounting 16, for example. It is likewise conceivable for the crushing plate only to have one
Fig. 2 shows a crushing plate 10 having a plurality of crushing tools 18. The crushing plate 10 is, by way of example, partially ring-shaped and comprises eight crushing tools 18 which are attached to the surface of the crushing plate 10 in a manner offset from one another. For example, two crushing tools 18 in each case are arranged in the circumferential direction of the crushing roll alongside one another, so that four rows running in the circumferential direction and each comprising two crushing tools are arranged axially behind one another. The crushing tools 18 are fastened to the crushing plate 10 by means of a mounting 16 in each case. For example, the mountings 16 are integrally formed with the crushing plate 10 or connected to said crushing plate 10 in a substance-to-substance bonded manner, in particular welded. The circumference of the crushing plate 10 is strengthened over the width of the mountings 16, so that the diameter of the crushing roll is increased. The crushing plate 10 therefore has a step-shaped profile in the axial direction, the individual steps extending in the circumferential direction.
The crushing plate 10 is formed from a metal matrix composite material and comprises an anti-wear insert 14 and a metal matrix 12. The anti-wear insert 14 is preferably embedded at least partially in the metal matrix 12. For example, the crushing plate 10 in Fig. 2 comprises a plurality of anti-wear inserts 14 which are partially ring-shaped. The anti-wear inserts have a thickness of 10 ¨ 200mm, in particular 20 ¨ 100mm, preferably 30 ¨ 50mm, for example, are strip-shaped and arranged alongside one another in an axial direction. The crushing plate 10 in Fig. 2 has ten anti-wear inserts 14, for example, which each exhibit the same width and thickness, wherein the width corresponds to the width of a step, in particular to the width of a mounting 16, for example. It is likewise conceivable for the crushing plate only to have one
6 Date Recue/Date Received 2020-04-16 anti-wear insert which extends over the surface of the crushing plate. The entire surface of the crushing plate 10 is preferably covered with at least one or multiple anti-wear inserts 14.
The anti-wear inserts 14 are each formed in one piece, for example, and comprise a hard metal, such as tungsten carbide, titanium carbide, boron carbide or chromium carbide or ceramic, or a combination of these materials, and have a porous or honeycomb structure. The anti-wear insert is preferably produced from a powder and/or granular mixture of the aforementioned materials, wherein the mixture is heated, in particular treated with gas, and baked. In particular, the mixture is heated in a flexible mold, for example, which corresponds to the negative mold of the anti-wear insert. The mixture then cools down and hardens into a highly wear-resistant body with a porous structure. The metal matrix material is a high-temperature-resistant steel and/or a steel with a hardness of roughly 150 ¨
400 HB (Brinell), for example. A high-temperature-resistant steel should be understood to mean a heat-resistant steel with a high chromium-nickel content which has a temperature resistance of up to 650 C, in particular up to 1000 C. Steels of this kind are austenitic chromium-nickel steels, for example, such as GX25CrNiSi18-9, GX40CrNiSi25-12, GX40NiCrSiNb35-26, for example.
High-temperature-resistant steels up to 600 C are steels according to DIN EN
10213, for example. High-temperature-resistant steels up to 1200 C are steels according to DIN EN
10295, for example.
Anti-wear inserts 14 are at least partially or completely enclosed by the metal matrix material 12. The crushing plate 10 has an upper, radially outwardly facing region which encloses the anti-wear insert 14 embedded in the metal matrix material 12 and has a radially inwardly facing region which only comprises the metal matrix material 12.
During production of the crushing plate the anti-wear insert 14 made of ceramic or hard metal such as tungsten carbide, titanium carbide, boron carbide, niobium carbide or chromium carbide, or a mixture of these materials, is positioned, for example fastened, in a casting mold for the casting of the anti-wear unit 14. The anti-wear insert 14 has a plate shape, for example, and is positioned on the upper side of the crushing plate 10. The crushing plate 10 is then cast from the metal matrix material, so that the anti-wear insert 14 is at least partially enclosed by the casting material, namely by the metal matrix material 12, wherein the casting material
The anti-wear inserts 14 are each formed in one piece, for example, and comprise a hard metal, such as tungsten carbide, titanium carbide, boron carbide or chromium carbide or ceramic, or a combination of these materials, and have a porous or honeycomb structure. The anti-wear insert is preferably produced from a powder and/or granular mixture of the aforementioned materials, wherein the mixture is heated, in particular treated with gas, and baked. In particular, the mixture is heated in a flexible mold, for example, which corresponds to the negative mold of the anti-wear insert. The mixture then cools down and hardens into a highly wear-resistant body with a porous structure. The metal matrix material is a high-temperature-resistant steel and/or a steel with a hardness of roughly 150 ¨
400 HB (Brinell), for example. A high-temperature-resistant steel should be understood to mean a heat-resistant steel with a high chromium-nickel content which has a temperature resistance of up to 650 C, in particular up to 1000 C. Steels of this kind are austenitic chromium-nickel steels, for example, such as GX25CrNiSi18-9, GX40CrNiSi25-12, GX40NiCrSiNb35-26, for example.
High-temperature-resistant steels up to 600 C are steels according to DIN EN
10213, for example. High-temperature-resistant steels up to 1200 C are steels according to DIN EN
10295, for example.
Anti-wear inserts 14 are at least partially or completely enclosed by the metal matrix material 12. The crushing plate 10 has an upper, radially outwardly facing region which encloses the anti-wear insert 14 embedded in the metal matrix material 12 and has a radially inwardly facing region which only comprises the metal matrix material 12.
During production of the crushing plate the anti-wear insert 14 made of ceramic or hard metal such as tungsten carbide, titanium carbide, boron carbide, niobium carbide or chromium carbide, or a mixture of these materials, is positioned, for example fastened, in a casting mold for the casting of the anti-wear unit 14. The anti-wear insert 14 has a plate shape, for example, and is positioned on the upper side of the crushing plate 10. The crushing plate 10 is then cast from the metal matrix material, so that the anti-wear insert 14 is at least partially enclosed by the casting material, namely by the metal matrix material 12, wherein the casting material
7 Date Recue/Date Received 2020-04-16 infiltrates the porous structure of the anti-wear insert 14, for example. In particular, the anti-wear insert 14 is completely enclosed by the casting material.
The crushing tools 18 are oriented at an angle of roughly 30-600, preferably of 45 , to the radial of the crushing roll and each received in a mounting 16. The mountings 16 likewise have at least one anti-wear insert 14, for example, and are also formed from the metal matrix composite material. The anti-wear insert 14 is arranged on the rear side of the mounting 16, in particular on the radially outwardly facing surface of the mounting 16. The region of the mounting 16 facing in the direction of the crushing plate 10 is formed exclusively from the metal matrix material 12, wherein the radially outwardly pointing region of the mounting 16 is formed from the metal matrix composite material and encloses the anti-wear insert 14.
Fig. 3 shows a sectional view of the crushing plate 10 in Fig. 2. Fig. 3 shows two anti-wear inserts 14 on the surface of the crushing plate 10 which each lie against a mounting 16. The mounting 16 is integrally formed with the crushing plate and has a bore 20 which extends at an angle of roughly 30-60 , preferably 45 , to the radial of the crushing roll. The crushing tool 18 is arranged on the side surface of the mounting 16 facing in the direction of rotation of the crushing roll. The crushing tool preferably has a fastening segment 22 which is connected to the mounting 16 and a wear segment 24 which projects from the mounting 16 and comes into contact with the material being crushed. The fastening segment 22 has a shaft which is fastened, for example screwed, in the bore 20 of the mounting 16. The wear region 24 is substantially tooth-shaped in design and is integrally formed with the fastening region or connected thereto in a substance-to-substance bonded manner, in particular welded, for example. The crushing tool 18 is preferably formed from a metal matrix composite material, wherein an anti-wear insert 14 is arranged on the surface, in particular at the tip of the crushing tool 18, and the crushing tooth is cast from the metal matrix material. In particular, only the wear segment 24 of the crushing tool 18 is formed from a metal matrix composite material, wherein one or multiple anti-wear inserts are arranged on the surface of the wear segment 24 facing in the direction of rotation and are enclosed at least partially by the metal matrix material.
The wear segment 24 and the fastening segment 22 are, for example, screwed to one another or connected to one another in a substance-to-substance bonded manner, for example by welding.
The crushing tools 18 are oriented at an angle of roughly 30-600, preferably of 45 , to the radial of the crushing roll and each received in a mounting 16. The mountings 16 likewise have at least one anti-wear insert 14, for example, and are also formed from the metal matrix composite material. The anti-wear insert 14 is arranged on the rear side of the mounting 16, in particular on the radially outwardly facing surface of the mounting 16. The region of the mounting 16 facing in the direction of the crushing plate 10 is formed exclusively from the metal matrix material 12, wherein the radially outwardly pointing region of the mounting 16 is formed from the metal matrix composite material and encloses the anti-wear insert 14.
Fig. 3 shows a sectional view of the crushing plate 10 in Fig. 2. Fig. 3 shows two anti-wear inserts 14 on the surface of the crushing plate 10 which each lie against a mounting 16. The mounting 16 is integrally formed with the crushing plate and has a bore 20 which extends at an angle of roughly 30-60 , preferably 45 , to the radial of the crushing roll. The crushing tool 18 is arranged on the side surface of the mounting 16 facing in the direction of rotation of the crushing roll. The crushing tool preferably has a fastening segment 22 which is connected to the mounting 16 and a wear segment 24 which projects from the mounting 16 and comes into contact with the material being crushed. The fastening segment 22 has a shaft which is fastened, for example screwed, in the bore 20 of the mounting 16. The wear region 24 is substantially tooth-shaped in design and is integrally formed with the fastening region or connected thereto in a substance-to-substance bonded manner, in particular welded, for example. The crushing tool 18 is preferably formed from a metal matrix composite material, wherein an anti-wear insert 14 is arranged on the surface, in particular at the tip of the crushing tool 18, and the crushing tooth is cast from the metal matrix material. In particular, only the wear segment 24 of the crushing tool 18 is formed from a metal matrix composite material, wherein one or multiple anti-wear inserts are arranged on the surface of the wear segment 24 facing in the direction of rotation and are enclosed at least partially by the metal matrix material.
The wear segment 24 and the fastening segment 22 are, for example, screwed to one another or connected to one another in a substance-to-substance bonded manner, for example by welding.
8 Date Recue/Date Received 2020-04-16 Fig. 4 shows a crushing tool 18 for attachment to a crushing plate 10 of a crushing roll. The crushing tool 18 comprises a fastening segment 22 and a wear segment 24 which are connected to one another and form the crushing tool 18. The fastening segment 22 can be fastened to a crushing roll of a roll crusher and has a shaft. The shaft of the fastening segment 22 forms an end of the crushing tool 18 and is fastened in the surface of the crushing plate 10, for example, or to a mounting 16 attached to the crushing plate 10. The shaft is preferably completely arranged in the surface of the crushing plate or in a mounting 16 attached to the crushing plate 10 according to Fig. 2. The shaft has a plurality of diameters which are used to fasten the shaft in a bore 20 in the surface of the crushing plate, for example. It is likewise conceivable for the shaft to have a thread for fastening in the bore 20 or the mounting 16 on the surface of the crushing plate 10. For example, the shaft may have a constant diameter and is fastened by means of a substance-to-substance bonded connection, such as welding, adhesion, or soldering, to the crushing plate or to a mounting 16. The wear segment 24 and the fastening segment 22 are connected to one another via a substance-to-substance bonded connection, such as soldering, welding or adhesion, for example.
The wear segment 24 preferably projects at least partially or completely from the surface or the mounting 16 of the crushing plate 10 and is exposed to wear through contact with the material being crushed. The fastening segment 22 may be integrally configured with the wear segment 24 or be a separate component which is formed from a more ductile steel compared with the wear segment 24. For example, a steel with a hardness of 90 - 500 HB
(Brinell), preferably 120 - 350 HB, in particular 150 - 200 HB, and preferably a ductile yield of roughly 18- 26% is used.
The wear segment 16 is substantially tooth-shaped in design. A truncated cone, semi-spherical or paraboloid shape is also conceivable. The outwardly pointing tip of the wear segment 24, for example roughly half the wear segment 24, is made of the metal matrix composite material.
The anti-wear insert 14 forms the surface at least partially, in particular the tip of the crushing tool 18, and is tooth-shaped in design. The metal matrix composite material and the anti-wear insert 14 involve the material already described with reference to Figs. 2 and 3.
The wear segment 24 preferably projects at least partially or completely from the surface or the mounting 16 of the crushing plate 10 and is exposed to wear through contact with the material being crushed. The fastening segment 22 may be integrally configured with the wear segment 24 or be a separate component which is formed from a more ductile steel compared with the wear segment 24. For example, a steel with a hardness of 90 - 500 HB
(Brinell), preferably 120 - 350 HB, in particular 150 - 200 HB, and preferably a ductile yield of roughly 18- 26% is used.
The wear segment 16 is substantially tooth-shaped in design. A truncated cone, semi-spherical or paraboloid shape is also conceivable. The outwardly pointing tip of the wear segment 24, for example roughly half the wear segment 24, is made of the metal matrix composite material.
The anti-wear insert 14 forms the surface at least partially, in particular the tip of the crushing tool 18, and is tooth-shaped in design. The metal matrix composite material and the anti-wear insert 14 involve the material already described with reference to Figs. 2 and 3.
9 Date Recue/Date Received 2020-04-16 List of reference numbers 1 crushing roll crushing plate 11 roll crusher 5 12 metal matrix 14 anti-wear insert 16 mounting 18 crushing tool bore
10 22 fastening segment 24 wear segment 26 crushing gap Date Recue/Date Received 2020-04-16
Claims (12)
1. A crushing roll (1) of a roll crusher (11) having a plurality of crushing plates (10) which form the lateral surface of the crushing roll (1) and a plurality of crushing tools (18) attached to the crushing plate (10), characterized in that at least one crushing plate (10) is formed from a metal matrix composite material which has an anti-wear insert (14) made of a hard metal and/or made of ceramic.
2. The crushing roll (1) as claimed in claim 1, wherein each crushing plate (10) has a plurality of anti-wear inserts (14).
3. The crushing roll (1) as claimed in one of the preceding claims, wherein the crushing plates (10) are produced by a casting method.
4. The crushing roll (1) as claimed in one of the preceding claims, wherein the anti-wear insert (14), comprises tungsten carbide, ceramic, titanium carbide, boron carbide, niobium carbide or chromium carbide, or a mixture of these materials.
5. The crushing roll (1) as claimed in one of the preceding claims, wherein the anti-wear insert (10) is cast at least partially in a metal matrix material.
6. The crushing roll (1) as claimed in one of the preceding claims, wherein the anti-wear insert (14) is partially ring-shaped.
7. The crushing roll (1) as claimed in one of the preceding claims, wherein the anti-wear insert (14) forms the surface of the crushing plate (10), at least in part.
8. The crushing roll (1) as claimed in one of the preceding claims, wherein the crushing roll has a mounting (16) for receiving a crushing tool (18) and wherein the mounting (16) is formed from a metal matrix composite material which has an anti-wear insert (14) made of a hard metal and/or made of ceramic.
9. The crushing roll (1) as claimed in one of the preceding claims, wherein the anti-wear insert (14) has a porous structure.
10. The crushing roll (1) as claimed in one of the preceding claims, wherein the crushing tool (18) is formed from a metal matrix composite material which has an anti-wear insert (14) made of a hard metal and/or made of ceramic.
11. A method for producing a crushing roll (1) of a roll crusher (11), wherein the crushing roll (1) has a plurality of crushing plates (10) which form the lateral surface of the crushing roll (1) and the method comprises the steps:
-positioning an anti-wear insert (14) made of a hard metal and/or ceramic in a casting mold for casting a crushing plate (10) of the crushing roll (1), - casting the crushing plate (10) from a metal matrix material, so that the anti-wear insert (14) is at least partially enclosed by the metal matrix material and - fastening a plurality of crushing tools (18) to the crushing plate (10).
-positioning an anti-wear insert (14) made of a hard metal and/or ceramic in a casting mold for casting a crushing plate (10) of the crushing roll (1), - casting the crushing plate (10) from a metal matrix material, so that the anti-wear insert (14) is at least partially enclosed by the metal matrix material and - fastening a plurality of crushing tools (18) to the crushing plate (10).
12. The method as claimed in claim 11, wherein the anti-wear insert (14) is produced prior to positioning in the casting mold from a powder and/or granular mixture of hard metal and/or ceramic by means of heating.
Applications Claiming Priority (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE102017219013.2A DE102017219013B3 (en) | 2017-10-24 | 2017-10-24 | Crushing roll of a roll crusher and method for producing a crushing roll |
| DE102017219013.2 | 2017-10-24 | ||
| PCT/EP2018/078472 WO2019081313A1 (en) | 2017-10-24 | 2018-10-18 | Crushing roll of a roll crusher and method for producing a crushing roll |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CA3079295A1 true CA3079295A1 (en) | 2019-05-02 |
| CA3079295C CA3079295C (en) | 2022-05-31 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CA3079295A Active CA3079295C (en) | 2017-10-24 | 2018-10-18 | Crushing roll of a roll crusher and method for producing a crushing roll |
Country Status (8)
| Country | Link |
|---|---|
| EP (1) | EP3700675B1 (en) |
| CN (1) | CN111263663B (en) |
| CA (1) | CA3079295C (en) |
| DE (1) | DE102017219013B3 (en) |
| ES (1) | ES2904297T3 (en) |
| PL (1) | PL3700675T3 (en) |
| PT (1) | PT3700675T (en) |
| WO (1) | WO2019081313A1 (en) |
Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE102019212715A1 (en) * | 2019-08-26 | 2020-03-05 | Thyssenkrupp Ag | Sieve made by casting |
| CN112892740A (en) * | 2021-01-14 | 2021-06-04 | 广东韶钢松山股份有限公司 | Crushing roller |
| CN114472856B (en) * | 2022-04-14 | 2022-06-28 | 唐山贵金甲科技有限公司 | Roller tooth sleeve of steel slag treatment crushing roller press and production process |
Family Cites Families (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE93384C (en) * | ||||
| DE4123967A1 (en) | 1991-07-19 | 1993-01-21 | Krupp Industrietech | Machine for crushing stone - has replaceable teeth which are attached to crushing rollers by rings |
| US8308096B2 (en) * | 2009-07-14 | 2012-11-13 | TDY Industries, LLC | Reinforced roll and method of making same |
| RU2555412C2 (en) * | 2010-12-29 | 2015-07-10 | Эф-Эл-Смидт А/С | Crushing body and method of its production |
| EP2940169A1 (en) * | 2014-04-30 | 2015-11-04 | Sandvik Intellectual Property AB | A wear resistant component and a device for mechanical decomposition of material provided with such a component |
-
2017
- 2017-10-24 DE DE102017219013.2A patent/DE102017219013B3/en active Active
-
2018
- 2018-10-18 WO PCT/EP2018/078472 patent/WO2019081313A1/en active Search and Examination
- 2018-10-18 EP EP18789608.9A patent/EP3700675B1/en active Active
- 2018-10-18 ES ES18789608T patent/ES2904297T3/en active Active
- 2018-10-18 CA CA3079295A patent/CA3079295C/en active Active
- 2018-10-18 PL PL18789608T patent/PL3700675T3/en unknown
- 2018-10-18 PT PT187896089T patent/PT3700675T/en unknown
- 2018-10-18 CN CN201880068991.3A patent/CN111263663B/en active Active
Also Published As
| Publication number | Publication date |
|---|---|
| EP3700675A1 (en) | 2020-09-02 |
| PL3700675T3 (en) | 2022-04-11 |
| ES2904297T3 (en) | 2022-04-04 |
| WO2019081313A1 (en) | 2019-05-02 |
| EP3700675B1 (en) | 2021-12-01 |
| CN111263663B (en) | 2022-05-17 |
| PT3700675T (en) | 2022-02-17 |
| CN111263663A (en) | 2020-06-09 |
| DE102017219013B3 (en) | 2018-08-23 |
| CA3079295C (en) | 2022-05-31 |
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