Roll crusher comprising scrapers, the surface of which comprises polycrystalline diamond

Description

1 / 101 “ROLLER CRUSHER COMPRISING SCRAPERS, THE SURFACE OF WHICH COMPRISES POLYCRYSTALLINE DIAMOND FIELD OF THE INVENTION

[0001] The present disclosure relates to a roller crusher having two generally parallel rollers, wherein the roller crusher comprises a flange fixed at least at one end of one of the rollers. BACKGROUND OF THE INVENTION

[0002] During the crushing or grinding of rock, ore, cement clinker, and other hard materials, roller crushers can be used, having two generally parallel rollers that rotate in opposite directions, one towards the other, and which are separated by an opening. The material to be crushed is then fed into the opening. One type of roller crusher is called high-pressure roller crushers or high-pressure roller crushers. This type of comminution was described in US4357287, where it was established that, in reality, it is not necessary to strive for single-particle breakage when trying to obtain fine and / or very fine comminution of material. On the contrary, it was discovered that by inducing such high compressive forces that briquetting, or agglomeration of particles, occurred during comminution, substantial energy savings and productivity increases can be obtained. This crushing technique is called interparticle crushing.Here, the material to be crushed or pulverized is not only crushed by the crushing surfaces of the rollers, but also by particles within the material to be crushed; consequently, the name inter-particle crushing. US4357287. Petition 870250095186, dated 10 / 17 / 2025, p. 15 / 150 2 / 101 specifies that such agglomeration can be achieved using much higher compressive forces than previously done. As an example, forces of up to 200 kg / cm2 were previously used, whereas the solution in US4357287 suggests using forces of at least 500 kg / cm2 and up to 1500 kg / cm2. In a roll crusher having a roll diameter of 1 meter, 1500 kg / cm2 would translate to a force of more than 200,000 kg per meter of roll length, whereas previously known solutions could, and should, only achieve a fraction of these forces.Another property of interparticle crushing is that a roll crusher must be fed to the maximum with the material to be crushed, meaning that the opening between the two opposing rolls of the roll crusher must always be filled with material along its entire length, and there must also always be material filled to a certain height above the opening to keep it full at all times and maintain a state of particle-on-particle compression. This will increase the output and the reduction of finer material. This is in sharp contradiction with older solutions where it was always emphasized that single-particle crushing was the only way in which fine and very fine particle comminution could be achieved.

[0003] Inter-particle crushing, unlike some other types of crushing equipment, such as sizers, has the attribute of not creating a series of shocks and highly variable pressure during use. Instead, equipment using inter-particle crushing operates at a very high, more or less constant pressure. Petition 870250095186, dated 10 / 17 / 2025, page 16 / 150 3 / 101 regarding the material present in the crushing zone created in and around the opening between the rollers.

[0004] To maintain the crushing effect along the entire length of the crushing rolls, flanges can be arranged at the ends of the crushing rolls; one flange at each end of a roll, or one flange at one end of each roll, but at opposite ends of the roll crusher. With such an arrangement, it is possible to create a more efficient and uniform roll feed inlet. The flanges will allow the material to be fed in such a way that a preferred material pressure is created over the entire length of the crusher rolls. It has been shown that it is possible to increase the capacity of a given roll crusher by up to 20%, or sometimes even more, using flanges. A general problem associated with crushing rolls without flanges is that the ratio between the roll diameter and the roll width is very important due to a significant edge effect, i.e., the crushing result is reduced at the edges of the rolls.This is due to the fact that material can escape over the edges of the rollers, thus reducing the crushing pressure on the material towards the opening at the edges of the rollers. Without flanges, it is therefore necessary to recycle both the material that escapes from the rollers and some of the material that has passed through the opening at the edges of the crusher rollers due to lower pressure resulting in reduced edge breakage.

[0005] However, during the operation of a flanged crusher, the flanges and also the edges of the opposite crusher roll are under a lot of stress and Petition 870250095186, dated 10 / 17 / 2025, page 17 / 150 4 / 101 wear, and material buildup will occur at the transition between the crusher roller surface and the flange. Such excessive material buildup needs to be consistently removed during crusher operation.

[0006] The state of the art has suggested a scraper element to remove material buildup at the transition between the crusher roller surface and the flange, see, for example, AU2018264756 or US5054701.

[0007] Proceeding from there, it is an object of the present disclosure to provide a roll crusher having flanges, wherein the flanges and opposite end edges of the roll crusher are subject to less stress and wear. SUMMARY OF THE INVENTION

[0008] According to a first aspect of the disclosure, this and other objectives are achieved, wholly or at least in part, by a roller crusher having two generally parallel rollers arranged to rotate in opposite directions, one towards the other and separated by an opening, each roller having two ends, the roller crusher comprising:

[0009] A flange fixed at least at one end of one of the rollers,

[0010] The flange extending in a radial direction from the roller,

[0011] The flange having a height (H) above an outer surface of the roller,

[0012] Wherein the roller crusher further comprises at least one scraper arranged in a Petition 870250095186, dated 10 / 17 / 2025, page 18 / 150 5 / 101 end of the roller with a flange to at least partially remove accumulated material on the flange and / or on the outer surface at the end of the roller; and

[0013] Wherein each of at least one scraper comprises a scraping element having a scraping surface which scraping surface comprises a polycrystalline diamond (PCD).

[0014] A first advantage of at least one scraper comprises a scraping element having a scraping surface which scraping surface comprises a polycrystalline diamond (PCD) wherein the wear area of ​​the scraper is considerably extended. Normally, such scraping surfaces would comprise wear-resistant material such as composite or ceramic materials comprising Tungsten carbide, Titanium carbide, or Vanadium carbide, but with a scraping surface comprising polycrystalline diamond (PCD), the wear life can be extended by up to about 50 times compared with comprising only, for example, a composite material comprising Tungsten carbide.

[0015] It is conceivable to provide additional surfaces of the scraper element with a polycrystalline diamond (PCD). For example, lateral surfaces of the scraper element may comprise a polycrystalline diamond (PCD). Alternatively termed, the scraping surface may extend to also encompass the lateral surfaces of the scraper element. Thus, it should be understood that the present inventive concept should not be interpreted as limited to Petition 870250095186, dated 10 / 17 / 2025, page 19 / 150 6 / 101 scrapers having only one forward-facing surface comprising a polycrystalline diamond (PCD).

[0016] According to one embodiment, at least one scraper is arranged at a distance to the flange and / or to the outer surface at the end of the roller.

[0017] The distances between the scraper and the roller and / or flange surface can alternatively be defined using a minimum roller distance and a minimum flange distance, respectively. The minimum roller distance is defined as the minimum distance between a scraper and the outer surface of the roller. Similarly, the minimum flange distance is defined as the minimum distance between a scraper and an inner surface of the flange.

[0018] According to one embodiment, the scraping element further comprises a wear-resistant material in which polycrystalline diamond (PCD) is at least partially embedded. The polycrystalline diamond (PCD) may, in an alternative embodiment, be fixed to a surface of a wear-resistant material of the scraping element.

[0019] The wear-resistant material may comprise a ceramic material, such as Titanium carbide, Vanadium carbide or Tungsten carbide; a metal-ceramic composite material such as a cemented carbide, for example, Titanium carbide, Tungsten carbide or Vanadium carbide with cobalt as a binder; or a metal matrix composite material comprising Titanium carbide, Tungsten carbide or Vanadium carbide. Petition 870250095186, dated 10 / 17 / 2025, page 20 / 150 7 / 101

[0020] In one embodiment, the wear-resistant material is a cemented carbide comprising tungsten carbide and, as a binder, cobalt, in which the binder content may be 10-15% by weight.

[0021] In one embodiment, polycrystalline diamond (PCD) is embedded in tungsten carbide, vanadium carbide, or titanium carbide.

[0022] According to one embodiment, the scraping element may comprise a layer of polycrystalline diamond (PCD). The polycrystalline diamond (PCD) layer may have a thickness of 0.4 to 3.2 mm, or 1.0 to 2.0 mm, or 1.35 to 1.8 mm, or 1.4 to 1.6 mm, or about 1.5 mm.

[0023] The diamond grain size of the polycrystalline diamond (PCD) from the scraping surface can be 0.8 to 30 μm, as determined by image analysis using a Scanning Electron Microscope (SEM).

[0024] Diamond grain size can be measured by various measurement techniques, such as laser size analyzers or scanning electron microscopes (SEM). An example of a laser size analyzer is a Malvern Particle Size Analyzer instrument which is based on laser diffraction. The values ​​determined using the laser size analyzer can be the initial diamond grain size which, for some applications, can subsequently be subjected to high-temperature / high-pressure sintering. When the diamond particles have been sintered and compacted to form polycrystalline diamond (PCD) Petition 870250095186, dated 10 / 17 / 2025, page 21 / 150 8 / 101 scraping surface, an image analysis by means of scanning electron microscopy is used to determine the final microstructural grain size distribution, i.e., the diamond grain size of the polycrystalline diamond (PCD) of the scraping surface.

[0025] According to one embodiment, the scraping surface of at least one scraper is arranged to incline in relation to a normal to the inner surface of the flange and to incline such that a distance between the normal to the inner surface of the flange and the scraping surface decreases towards the flange. The normal is defined as a line that is orthogonal to a plane defined by the inner surface of the flange.

[0026] One advantage of having the scraping surface inclined relative to the normal of the inner surface of the flange with a decreasing distance towards the flange is that the material removed from the corner position formed by the outer surface of the roller and the inner surface of the flange will be induced by the scraping surface inclined towards the center of the roller instead of being compressed and compacted between the scraping element and the inner surface of the flange.

[0027] According to one embodiment, the scraping surface may be substantially planar. Therefore, the variable distance as described above may, according to this embodiment, be further expressed in terms of a defined angle between the scraping surface and the normal N. This Petition 870250095186, dated 10 / 17 / 2025, page 22 / 150 9 / 101 The angle can be 1 to 15°, or 2 to 10°, or 3 to 8°, or 4 to 6°, or 5°.

[0028] According to one embodiment, at least one scraper has a surface facing the flange, which surface extends from the scraping element towards a rear end of at least one scraper, wherein the at least one scraper is structured and arranged so that a distance between the surface facing the flange and an inner surface of the flange decreases towards the scraping element over at least part of the extension.One advantage of a scraper with such an arrangement is that the material removed from the corner position formed by the outer surface of the roller and the inner surface of the flange will be prone to flow along that surface of the scraper facing the flange, and as the distance is increased away from and downstream of the scraping surface, the removed material will be allowed to be removed towards the center of the roller instead of being compressed and compacted between the scraper and the inner surface of the flange.

[0029] According to one embodiment, the flange-facing surface may be substantially planar. Therefore, the variable distance as described above may, according to this embodiment, be further expressed in terms of a defined angle between the flange-facing surface and the inner surface of the flange. This angle may be 5 to 25°, or 5 to 20°, or 5 to 15°, or 8 to 12°, or 10°. Petition 870250095186, dated 10 / 17 / 2025, page 23 / 150 10 / 101

[0030] According to one embodiment, at least one scraper has a surface facing away from the flange, which surface extends from the scraping element towards a rear end of at least one scraper, wherein the at least one scraper is structured and arranged so that a distance between the surface facing away from the flange and an inner surface of the flange decreases towards the scraping element over at least part of the extension. In at least one scraper, the surface facing away from the flange is opposite the surface facing towards the flange. Again, the scraper provides a surface that will induce the removed material to be moved towards the center of the roller, which is beneficial.

[0031] According to one embodiment, the surface facing away from the flange includes a surface that is substantially planar. Therefore, the variable distance as described above can, for this embodiment, be further expressed in terms of a defined angle between the surface facing away from the flange and the inner surface of the flange. This angle can be 5 to 25°, or 5 to 20°, or 5 to 15°, or 8 to 12°, or 10°.

[0032] According to one embodiment, the scraping element comprises a front portion and a rear portion that are fixed to each other, wherein the front portion has the scraping surface. The front and rear portions of the scraping element may comprise different compositions of wear-resistant materials. For example, the Petition 870250095186, dated 10 / 17 / 2025, page 24 / 150 11 / 101 The front portion may comprise polycrystalline diamond (PCD) on the scraping surface, together with tungsten carbide or vanadium carbide, while the rear portion may comprise tungsten carbide or vanadium carbide. The front and rear portions may be brazed together, but they may also be manufactured in one piece with the polycrystalline diamond arranged on the scraping surface of the scraping element.

[0033] According to one embodiment, the rear portion has a surface facing the flange and a surface facing away from the flange, said surfaces being substantially parallel with an inner surface of the flange.

[0034] According to one embodiment, at least one scraper is arranged in a lower part of the roller crusher.

[0035] The phrase “bottom of the roller crusher” should be interpreted broadly here. The terminology here is intended to cover all positions of at least one scraper that will be situated below a plane defined by the two geometric rotational axes of the crusher rollers. Thus, the above embodiment may alternatively be expressed as where at least one scraper is arranged such that the scraping surface of at least one scraper is situated below a substantially horizontal plane that intersects both geometric rotational axes of the crusher rollers. Petition 870250095186, dated 10 / 17 / 2025, p. 25 / 150 12 / 101

[0036] This can be advantageous as it allows the material to exit the crusher roll through the outlet along with the crushed material at the lower end of the roll crusher.

[0037] According to one embodiment, at least one scraper is disposed at approximately 6-9 o'clock, 7-9 o'clock or 7-8 o'clock of the roller, when viewing the roller from a side showing clockwise rotation.

[0038] According to one embodiment, at least one scraper is arranged so that the scraping surface of at least one scraper is facing at least partially downwards to allow the removed material to exit from the roller and the scraping surface by gravitational force.

[0039] This can be advantageous as it prevents the scraped material from accumulating on the scraping surface, which could risk material deposition on said surface.

[0040] According to one embodiment, at least one scraper has a fixing position located at a distance from the outer surface of the roller, wherein at least one scraper is arranged so that a position of the scraping surface of at least one scraper is situated on, or consecutive to, a radial geometric axis extending from a rotational geometric axis of the roller and through the fixing position.

[0041] The phrase “consecutive to” means that a point on the outer surface of the roller moves during roller rotation first beyond the radial geometric axis extending from a rotational geometric axis of the roller through the fixing position and consecutively thereafter. Petition 870250095186, dated 10 / 17 / 2025, p. 26 / 150 13 / 101 beyond the scraping surface of at least one scraper. Thus, viewed in the direction of rotation of the roller, the scraping surface is positioned consecutively to the radial geometric axis that extends from a rotational geometric axis of the roller through the fixing position.

[0042] This can be advantageous if accumulated material on the flange and / or the outer surface at the end of the roll has become too hard to remove and the at least one scraper strikes the non-removable material with full impact, the scraper's attachment to the roll crusher may then be broken. When such separation occurs, the at least one scraper with this arrangement will move away from the outer surface of the roll instead of striking the outer surface of the roll at the end of the roll.

[0043] For this separation, at least one scraper may be rigidly fixed. However, such rigid fixing may be configured to withstand impact forces up to a predetermined threshold force to ensure that the flanges or the outer surface at the end of the roller do not risk becoming damaged by a collision between a scraper and the non-removable material.

[0044] According to one embodiment, the roll crusher further comprises at least one retaining device for at least one scraper, wherein at least one retaining device connects to a roll crusher structure in a position for fixing at least one scraper.

[0045] According to one embodiment, at least one restraint device comprises at least one support and Petition 870250095186, dated 10 / 17 / 2025, p. 27 / 150 14 / 101 at least one wedge element, wherein the wedge element is structured and arranged to fix at least one scraper in at least one support such that an angular position of at least one scraper is displaced relative to an angular position of at least one support in a rotational plane of the roller.

[0046] According to one embodiment, the roll crusher further comprises a flexible retention arrangement designed to couple at least one scraper with a roll crusher frame.

[0047] According to one embodiment, at least one scraper is at least two scrapers arranged consecutively to each other at one end of the roller with a flange to at least partially remove material accumulated on the flange and / or on the outer surface at the end of the roller.

[0048] The roller crusher of this embodiment of the first aspect can be advantageous as it allows for the selective removal of material accumulated on the crushing rollers during operation. Specifically, the roller crusher of the first aspect allows for at least partial removal of material accumulated on the flange and / or the outer surface at the end of the roller. This particular part of a roller crusher is especially prone to material accumulation which, if not removed, can risk damaging the rollers. The roller crusher of this embodiment of the first aspect provides at least two scrapers arranged consecutively one after the other along the end of the roller. The at least two scrapers Petition 870250095186, dated 10 / 17 / 2025, p. 28 / 150 15 / 101 arranged consecutively are associated with a number of advantages.

[0049] A primary advantage of having at least two consecutively arranged scrapers is to extend operating time. The scraper that first encounters the material buildup (herein referred to as the “front scraper” or “first scraper in line”) will be exposed to significant wear. Over time, the material of the front scraper will gradually wear away as a result of wear, consequently increasing the distance between the front scraper and the roller and / or flange surface. As this wear process occurs gradually, the scraper arranged consecutively to and behind the front scraper (herein referred to as the “second scraper” or “next first scraper”) will be increasingly exposed to material buildup and thus gradually take over more and more of the task that the front scraper performed when the scrapers were new.This gradual transfer of scraping responsibility from the front scraper to the next scraper allows for extended operating time before scrapers need to be replaced, thereby reducing roll crusher downtime and contributing to overall plant efficiency. As readily recognized by those skilled in the art, providing a second scraper after the first scraper would have the exact same effect as the first scraper begins to wear out. Therefore, the number of consecutive scrapers may be more than two for some roll crusher designs. Petition 870250095186, dated 10 / 17 / 2025, page 29 / 150 16 / 101

[0050] A second advantage of having at least two scrapers arranged consecutively is to reduce the influence that scraper malfunction has on the operation of the roll crusher. The harsh environment to which scrapers are subjected during operation can, from time to time, result in irreparable damage to a scraper. Typically, it will be the front scraper that is most adversely affected as it is situated at the front and consequently receives the full impact of the newly accumulated material. Scrapers can not only be structurally damaged. Additionally, or alternatively, their attachment to the roll mill can be broken, resulting in the scraper falling, typically resulting in an instantaneous end to the scraping performance of that particular scraper. By providing more than one scraper operating in the same region, redundancy is achieved that allows at least one scraper to break without having to shut down the roll crusher.

[0051] According to one embodiment, at least two scrapers are arranged in a lower part of the roller crusher.

[0052] According to one embodiment, the at least two scrapers are arranged at approximately 6-9 o'clock, 7-9 o'clock or 7-8 o'clock of the roller, when viewing the roller from one side showing clockwise rotation.

[0053] According to one embodiment, the at least two scrapers are arranged so that the scraping surfaces of at least two scrapers are facing at least partially downwards to allow the material Petition 870250095186, dated 10 / 17 / 2025, p. 30 / 150 17 / 101 removed skirt from the roller and scraping surfaces by gravitational force.

[0054] Again, this can be advantageous as it prevents the scraped material from accumulating on the scraping surface, which could risk material deposition on said surface.

[0055] According to one embodiment, the at least two scrapers each have a respective fixing position or have a common fixing position located at a distance from the outer surface of the roller, wherein the at least two scrapers are arranged so that a position of each scraping surface of at least two scrapers is located on, or consecutive to, a radial geometric axis extending from a rotational geometric axis of the roller and through the respective fixing position or common fixing position.

[0056] Again, the phrase “consecutive to” means that a point on the outer surface of the roller moves during roller rotation first beyond the radial geometric axis extending from a rotational geometric axis of the roller through the respective fixing position or common fixing position and consecutively beyond the scraping surface of at least one scraper. Thus, viewed in the direction of roller rotation, the scraping surface is positioned consecutively to the radial geometric axis extending from a rotational geometric axis of the roller through the respective fixing position or common fixing position. Petition 870250095186, dated 10 / 17 / 2025, p. 31 / 150 18 / 101

[0057] Again, with regard to the arrangement having only at least one scraper, this can be advantageous if the material accumulated on the flange and / or on the outer surface at the end of the roll has become too hard to be removed and the at least two scrapers strike the non-removable material with full impact, the attachment of the scrapers to the roll crusher may be broken. When such separation occurs, the at least two scrapers, with this arrangement, will move away from the outer surface of the roll instead of striking the outer surface of the roll at the end of the roll.

[0058] For this separation, at least two scrapers can be rigidly fixed. However, such rigid fixing can be configured to withstand impact forces up to a predetermined threshold force to ensure that the flanges or the outer surface at the end of the roller do not risk being damaged by a collision between a scraper and the non-removable material.

[0059] In another embodiment, at least one or at least two scraper(s) is / are articulatedly fixed and propelled towards a working position for at least one or at least two scraper(s). The propulsion must be of such magnitude as to maintain at least one or at least two scraper(s) in the working position until a predetermined threshold force. Again, such predetermined threshold force is adjusted to ensure that the flanges and / or the outer surface at the end of the roller do not risk becoming damaged by a collision between a scraper and non-removable material. It is also conceivable to use an articulated fixation. Petition 870250095186, dated 10 / 17 / 2025, p. 32 / 150 19 / 101 non-protruding combined with a torque limiter. For this embodiment, at least one or at least two scraper(s) would be apparently rigidly fixed to the roll crusher until at least one or at least two scraper(s) have been exposed to a force exceeding a certain threshold force at which the torque limiter is activated and at least one or at least two scraper(s) are allowed to move oscillatingly away from the roll surface.

[0060] The phrase “working position” means the position for the scraper in relation to the outer surface of the roll crusher and the flange to at least partially remove accumulated material on the flange and / or on the outer surface at the end of the roll.

[0061] According to one embodiment, at least two consecutive scrapers are arranged at equal distances from the flange and / or the outer surface at the end of the roller.

[0062] This can be advantageous since the scraper(s) that follow the front scraper will serve as backup scraper(s). In this way, even if these subsequent scraper(s) are not actively contributing to the scraping, they will be ready to take over that task if the front scraper fails.

[0063] According to one embodiment, at least two consecutive scrapers are arranged at different distances from the flange and the outer surface at the end of the roller. Petition 870250095186, dated 10 / 17 / 2025, p. 33 / 150 20 / 101

[0064] According to one embodiment, the at least two consecutive scrapers are arranged at decreasing distances from the flange and / or roller surface as seen from a front scraper to the consecutive scraper(s).

[0065] As previously mentioned, the phrase “a front scraper” means the scraper that will first encounter the accumulation of material when the roller rotates during operation of the roller crusher (here also called: the “first scraper in line”) and the term “next scraper” means the scraper(s) that will encounter the accumulation of material after the front scraper.

[0066] This can be advantageous as each scraper will have a dedicated scraping responsibility for scraping the material to be removed. This will decrease the impact and wear on each scraper and allow for extended operating time before scrapers need to be replaced, thereby reducing roller crusher downtime and contributing to overall plant efficiency.

[0067] The distances between the scraper and the roller and / or flange surface can alternatively be defined using a minimum roller distance and a minimum flange distance, respectively. The minimum roller distance is defined as the minimum distance between the scraper and the outer surface of the roller. Similarly, the minimum flange distance is defined as the minimum distance between the scraper and an inner flange surface. Thus, two scrapers being arranged at different distances from the roller surface Petition 870250095186, dated 10 / 17 / 2025, page 34 / 150 21 / 101 and / or the flange can alternatively be expressed as the two scrapers having minimum roller distances different from the roller surface and / or minimum flange distances different from the flange.

[0068] According to one embodiment, the at least two consecutive scrapers comprise at least two subsets of at least two consecutive scrapers, wherein the at least two consecutive scrapers in each subset are arranged at the same distance from the flange and / or the outer surface at the end of the roller.

[0069] This can be advantageous since at least two subsets of at least two consecutively arranged scrapers will extend the operating time.

[0070] According to one embodiment, consecutive scraper subsets are arranged at a decreasing distance from the flange and / or outer surface of the roller as seen from a front subset to the consecutive subset(s).

[0071] Again, this can be advantageous since the at least two subsets of at least two consecutively arranged scrapers will extend the operating time. The front scraper in each subset of at least two scrapers will first encounter the accumulated material (will be exposed to wear). Over time, the material of the front scrapers in each subset of at least two scrapers will therefore gradually wear away as a result of wear, consequently increasing the distance between the front scrapers in each subset of at least two scrapers. Petition 870250095186, dated 10 / 17 / 2025, p. 35 / 150 22 / 101 two scrapers and the outer surface of the roller and / or flange. As this wear process gradually occurs, the second scraper of each subset of at least two scrapers arranged consecutively to, and behind, the front scraper in each subset of at least two scrapers will be increasingly exposed to the accumulated material and thus gradually assumes more and more of the task that the front scraper in each subset of at least two scrapers performed when the subsets of at least two scrapers were new.This gradual transfer of scraping responsibility from the front scrapers in each subset of at least two scrapers to the next first scraper in each subset of at least two scrapers thus allows for extended operating time before the subsets of at least two scrapers have to be replaced, thereby reducing roll crusher downtime and contributing to overall plant efficiency. As readily recognized by those skilled in the art, providing a second subsequent subset of at least two scrapers after the first subsequent subset of at least two scrapers, or at least three scrapers in each scraper subset, would have exactly the same effect when the second scraper in each subset begins to wear out.Therefore, the number of consecutive scrapers in each subset, and also the number of consecutive subsets of at least two scrapers, can be more than two for some types of roller crusher. Petition 870250095186, dated 10 / 17 / 2025, p. 36 / 150 23 / 101

[0072] According to one embodiment, the at least two consecutive scraper subsets are identical to each other and arranged at equal distances from the flange and the outer surface at the end of the roller.

[0073] According to one embodiment, each scraping surface of at least two consecutive scrapers is arranged to incline in relation to a normal to the inner surface of the flange, and incline so that a distance between the normal to the inner surface of the flange and said scraping surface decreases toward the flange. Normal is defined as a line that is orthogonal to a plane defined by the inner surface of the flange.

[0074] This can be advantageous as it allows the material to be transported more easily away from the corner between the flange and the outer surface of the roller after being scraped, thus contributing to an efficient material removal process.

[0075] According to one embodiment, at least one scraper is arranged so that a minimum roller distance between the scraper and the outer surface of the roller is at least 31.5 mm.

[0076] According to one embodiment, each of at least scrapers is arranged so that a minimum roller distance between each scraper and the outer surface of the roller is at least 31.5 mm. In other words, the at least two scrapers can be arranged at a distance of at least 31.5 mm. Petition 870250095186, dated 10 / 17 / 2025, page 37 / 150 24 / 101

[0077] According to one embodiment, the roll crusher further comprises at least one retaining device for at least one or two scrapers, wherein at least one retaining device connects to a roll crusher structure in the wiring position of at least one scraper or in the respective fixing positions of or in a common fixing position of at least two scrapers.

[0078] According to one embodiment, the at least one retaining device comprises at least one support and at least one wedge element, wherein the wedge element is structured and arranged to fix at least one scraper, or an associated scraper of at least two scrapers, to at least one support such that an angular position of at least one scraper, or the associated scraper of at least two scrapers, is displaced relative to an angular position of at least one support in a rotational plane of the roller.

[0079] According to one embodiment, the roll crusher further comprises a flexible retention arrangement designed to couple at least one scraper or at least one scraper of at least two scrapers with a roll crusher structure.

[0080] This can be advantageous if at least one scraper can not only be structurally damaged, but its attachment to the roll crusher can be broken, typically resulting in the scraper falling into the chute for the crushed material and potentially hitting lower-lying equipment such as filtration equipment or conveyor equipment, and also contaminating the ground material. Petition 870250095186, dated 10 / 17 / 2025, p. 38 / 150 25 / 101 for further handling. 'Because it has a flexible retention arrangement, a scraper with a broken fastener will only result in an instantaneous end to the scraping performance of that particular scraper, but will not damage the lower arrangement equipment or contaminate the ground material.

[0081] According to one embodiment, the roll crusher comprises two flanges fixed at opposite ends of one of the rolls, and wherein the at least one scraper comprises a first subassembly of at least one scraper and a second subassembly of at least one scraper, the first and second subassemblies of which are each arranged in a respective end region of the roll with the two flanges.

[0082] According to one embodiment, the roll crusher comprises two flanges fixed at opposite ends of one of the rolls, and wherein the at least two scrapers comprise a first subset of at least two scrapers and a second subset of at least two scrapers, the first and second subsets of which are each arranged in a respective end region of the roll with the two flanges.

[0083] According to one embodiment, at least one mechanical scraper comprises a firing scraper positioned at a maximum tolerable distance from the roller surface and / or inner flange surface, which firing scraper is configured to initiate a firing signal to a roller crusher control system upon impact with accumulated material remaining on the flange and / or outer surface at the end of the roller. Petition 870250095186, dated 10 / 17 / 2025, page 39 / 150 26 / 101

[0084] According to one embodiment, such a trigger signal may involve initiating a planned service shutdown for the replacement of at least one scraper.

[0085] According to one embodiment, such a firing scraper positioned at a maximum tolerable distance to the flange and / or outer surface at the end of the roll comprises an embedded sensor, such as an accelerometer, or a strain gauge. Alternatively, the firing scraper may be mounted on a retaining device having an embedded sensor. Alternatively, the retaining device may be fixed to a roll crusher frame in a fixing position and a sensor may be disposed in or at said wiring position and configured to emit a firing signal in response to mechanical impact on the firing scraper. Thus, the term “firing scraper” should not be interpreted as meaning a special type of scraper per se. A firing scraper may be identical to any other scraper disclosed in the present invention.The term is used, instead, to identify a specific scraper among at least one scraper, which specific scraper is configured to act as a means of detection to provide pertinent information on material accumulation. This can be accomplished in different ways as long as the mechanical interaction between the accumulated material and the firing scraper is converted into an output signal.

[0086] By “maximum tolerable distance” is meant a predefined distance beyond which accumulated material should not be allowed to pass. In other words, Petition 870250095186, dated 10 / 17 / 2025, page 40 / 150 27 / 101 If the material buildup reaches the maximum tolerable distance, the buildup must be removed, or the machine shut down.

[0087] According to one embodiment, the roll crusher further comprises a remote material removal device configured to emit a material removal beam towards a target area, wherein the remote material removal device and at least one scraper are arranged consecutively relative to each other at one end of the roll with a flange to remove at least partially accumulated material on the flange and / or on the outer surface at the end of the roll.

[0088] The term “remote material removal device” should be interpreted here as a device that can emit a beam towards a target area located remotely from the device, which beam has material removal capability. This suggests that, unlike at least one mechanical scraper, the remote material removal device is not in contact with the material to be removed. Instead, the material is removed by means of the material removal beam. The material removal beam has a defined beam direction. This suggests that the target area can be selected by adjusting the direction of the material removal beam. Depending on the type of remote material removal device, the material is removed by different processes, such as, for example, mechanical impact, heating, ablation, exothermic reactions, etc.

[0089] The term “target area” should be interpreted here as a finite area or region that can be defined in Petition 870250095186, dated 10 / 17 / 2025, p. 41 / 150 28 / 101 A physical object toward which the material removal beam from the remote material removal device is directed. The area is finite as a result of the material removal beam having a defined direction, thus suggesting that the material removal beam has a defined spatial beam cross-section, or beam profile. The spatial beam cross-section can be defined by the physical properties of the beam as a function of radial distance from a geometric beam direction axis. These physical properties may have a non-uniform distribution. This suggests that the material removal efficiency may vary in the target area. However, material will be removed from all parts of the target area. The target area can be defined on the roller surface and / or the inner flange surface. Alternatively, the target areas can be defined on the accumulated material on the flange and / or the outer roller surface.There is an important distinction between the two alternatives: In the previous case, the material removal beam, after any accumulated material has been removed, will impinge on the roller surface and / or the inner flange surface. This can be advantageous as it allows for efficient and safe thorough cleaning of said surfaces. However, there may be a risk of unintentionally damaging said surfaces by removing roller surface material and / or flange surface material with the material removal beam. For such cases, the latter alternative may be beneficial. Here, the target area is selected so that the removal beam... Petition 870250095186, dated 10 / 17 / 2025, page 42 / 150 29 / 101 The material does not impinge on the roller surface and / or the inner surface of the flange, which surfaces are therefore protected from the material removal beam at all times. The last alternative mentioned can be provided by orienting the material removal beam substantially tangential to the roller surface at one end of the roller with a flange.

[0090] The phrase “remote material removal device disposed [...] at the end of the roller” shall be interpreted in the present invention as the remote material removal device being disposed in a position in which the remote material removal device is functionally capable of providing sufficient material removal in the intended target area, i.e., a defined area in the accumulated material present on the outer surface at the end of the roller and / or flange. As readily recognized by those skilled in the art, the material removal efficiency will depend both on the distance between the remote material removal device and the target area, and on the angle formed between the material removal beam and the target area. The distance is typically in the range of 50–500 mm from the target area.As also recognized by those skilled in the art, a rear portion of the remote material removal device, which may have an elongated body, can therefore be located some distance from the flange and the outer surface of the roller end.

[0091] This type of roller crusher can be advantageous because it allows for the selective removal of material. Petition 870250095186, dated 10 / 17 / 2025, p. 43 / 150 30 / 101 accumulated on the crushing rolls during operation. Specifically, this type of roll crusher allows for at least partial grinding of material accumulated on the flange and / or the outer surface of the roll end. This particular part of a roll crusher is especially prone to material buildup which, if not removed, can risk damaging the rolls.

[0092] A primary advantage of at least one or at least two mechanical scraper(s) and remote material removal device arranged consecutively relative to each other is to provide a safer system for keeping accumulated material on the flange at acceptable levels. The at least one or at least two mechanical scraper(s) will provide(s) continuous scraping operation. Consequently, the at least one or at least two mechanical scraper(s) will be ready to remove material at any given time during operation. However, since the mechanical scrapers are removing material by mechanical interaction with the accumulated material, the at least one or at least two mechanical scraper(s) will be subject to wear.When a roll crusher is started with clean rolls with no material accumulated on the flanges, the material, during the first period of crushing operation, will accumulate at the corner transition between the roll surface and the flange, creating a material buildup. During the first period after start-up, such as the first hour of operation, the material buildup will be relatively soft through the depth of the material and the scraper(s). Petition 870250095186, dated 10 / 17 / 2025, page 44 / 150 31 / 101 mechanical scraper(s) will therefore be able to effectively remove any excess buildup at an acceptable wear rate of at least one or at least two mechanical scraper(s) and acceptable levels of mechanical stress on the device(s) retaining at least one or at least two mechanical scraper(s) in place relative to the roll crusher. However, after continuous operation of the crusher for a longer period of time, the material buildup will become increasingly compacted and thus harden through the depth of the material. This will increase the wear rate of at least one or at least two mechanical scraper(s) as well as the levels of mechanical stress on the device(s) retaining at least one or at least two mechanical scraper(s) in place relative to the roll crusher. This problem is removed by removing accumulated material before it becomes too hard by means of the remote material removal device. By applying a material removal beam to a target area located at one end of the roller with a flange, the beam can partially or completely remove the material buildup located in that place. By removing the buildup, the wear life of the mechanical scraper(s) and their retention device(s) will be increased, thus providing a safer system for keeping the material buildup on the flange at acceptable levels.

[0093] Another advantage of having at least one or at least two mechanical scraper(s) and remote material removal device arranged consecutively relative to each other is to provide a more flexible and controllable system for Petition 870250095186, dated 10 / 17 / 2025, page 45 / 150 32 / 101 remove accumulated material from the crushing rollers during operation. When the mechanical scraper(s) is / are always in operation, the remote material removal device can be controlled. Such control can be, for example, initiating remote material removal at consecutive time intervals. The time intervals can be chosen based on site conditions, i.e., material to be crushed, humidity, temperature, etc. Alternatively, a feedback control system can be used. However, the obvious disadvantages of remote material removal devices, such as a reliable power source, pressurized air or water, dust creation, etc., can be minimized by selectively operating the remote material removal device only when most needed. The removal of remaining material is then left to the mechanical scraper(s).

[0094] Another advantage of having at least one or at least two mechanical scraper(s) and remote material removal device arranged consecutively relative to each other is that it allows easier control of the amount of material that is removed. During a normal crushing operation, complete removal of the accumulated material is not necessary. It may be sufficient to remove the top layers of material to ensure that the buildup does not come into contact with the adjacent roll. However, in some situations, for example, when the roll crusher is shut down for maintenance and replacement of the mechanical scraper(s), complete removal of the buildup can be beneficial as it reduces the risk of Petition 870250095186, dated 10 / 17 / 2025, page 46 / 150 33 / 101 that the accumulated material may be in the path of recently spun mechanical scraper(s).

[0095] As readily recognized by those skilled in the art from what has been mentioned above, the combination of at least one or at least two mechanical scraper(s) and a remote material removal device will act in synergy due to their different strengths and weaknesses.

[0096] According to one embodiment, a target area of ​​the remote material removal device is situated in front of at least two scrapers.

[0097] Preferably, the target area is located in a lower part of the roll crusher. This suggests that parts of the remote material removal device may be arranged in the upper part of the roll crusher, but the material removal beam may be directed to a target area located in a lower part of the roll crusher.

[0098] According to one embodiment, the target area of ​​the remote material removal device is laid out at approximately 6-9 o'clock, 7-9 o'clock, or 7-8 o'clock of the roller, when viewing the roller from one side showing clockwise rotation.

[0099] The term “target area” means the portion of the roller surface area and / or the portion of the inner flange surface and / or the portion of an outer surface of the material buildup that may accumulate on the flange and / or on the outer surface at the end of the roller that will be impacted by the beam during operation of the removal device. Petition 870250095186, dated 10 / 17 / 2025, page 47 / 150 34 / 101 remote material removal at any time. Thus, the target area is usually located in front of the remote material removal device.

[00100] The phrase “in front of” means that during roller rotation, a surface area or point on the outer surface of the roller and / or flange, if the remote material removal device is active, will first be impacted by the remote material removal device and subsequently passed through or scraped by at least one or at least two mechanical scraper(s). Thus, the target area of ​​the remote material removal device will act on accumulated material in a specific area or point on the outer surface of the roller and / or flange before the at least two mechanical scrapers can affect or scrape any material from the same area or point on the outer surface of the roller and / or flange.

[00101] According to one embodiment, the remote material removal device is a fluid jet knife.

[00102] The term “fluid jet knife” should be interpreted here as a device having a pressurized fluid chamber containing one or more continuous holes or slots through which a pressurized fluid exits in the form of a fluid plume during operation of the fluid jet knife. The fluid may be a liquid fluid such as, for example, water. This suggests that the fluid jet knife may be a water jet knife. Alternatively, the fluid may be a gaseous fluid such as, for example, air. Petition 870250095186, dated 10 / 17 / 2025, p. 48 / 150 35 / 101

[00103] As discussed above, the operation of the remote material removal device can be controlled while a mechanical scraper is always in operation, and the start of remote material removal at consecutive time intervals, and the placement of the target area of ​​the remote material removal device in front of at least one or at least two mechanical scraper(s), will be advantageous when the wear of at least one or at least two mechanical scraper(s) can be reduced and thus extend the operating time.

[00104] According to a second aspect of the disclosure, this and other aspects are also obtained, wholly or at least in part, by a method for operating a roller crusher for crushing granular material, wherein the roller crusher has two generally parallel rollers arranged to rotate in opposite directions, one toward the other and separated by an opening, each roller having two ends, the roller crusher comprising:

[00105] A flange fixed at least at one end of one of the rollers,

[00106] The flange extending in a radial direction from the roller,

[00107] The flange having a height (H) above an outer surface of the roll, wherein the roll crusher further comprises at least one or at least two scraper(s) arranged consecutively relative to each other at one end of the roll with a flange, wherein the method comprises at least the steps of: Petition 870250095186, dated 10 / 17 / 2025, page 49 / 150 36 / 101

[00108] At least partially remove accumulated material from the flange and / or the outer surface at the end of the roller by means of at least one or at least two scraper(s).

[00109] According to an embodiment of the second aspect of the present disclosure, the roll crusher further comprises a remote material removal device configured to emit a material removal beam towards a target area, wherein the remote material removal device is arranged consecutively to at least one or at least two consecutive scraper(s) at one end of the roll with a flange, wherein the method further comprises removing at least partially accumulated material on the flange and / or on the outer surface at the end of the roll by means of the remote material removal device.

[00110] According to an embodiment of the second aspect of this disclosure, the roll crusher further comprises a remote material removal device configured to emit a material removal beam towards a target area, wherein the remote material removal device is arranged consecutively to at least one or at least two consecutive scraper(s) at one end of the roll with a flange, wherein the method further comprises intermittently removing at least partially accumulated material on the flange and / or on the outer surface at the end of the roll by means of the remote material removal device.

[00111] According to an embodiment of the second aspect, the at least two scrapers comprise a scraper Petition 870250095186, dated 10 / 17 / 2025, page 50 / 150 37 / 101 firing mechanism positioned at a maximum tolerable distance from the flange and / or the outer surface at the end of the roller, whose firing scraper is configured to initiate material removal by the remote material removal device after impact with accumulated material remaining on the flange and / or the outer surface at the end of the roller.

[00112] Again, by “maximum tolerable distance” is meant a predefined distance beyond which accumulated material should not be allowed to pass. In other words, if the material buildup reaches the maximum tolerable distance, the buildup must be removed, or the machine shut down.

[00113] By “firing scraper” is meant a scraper which, upon making contact with the accumulated material, is capable of providing a firing signal to initiate the removal of material, i.e., step b). The firing scraper may be a conventional scraper having firing capability. This can be accomplished in different ways. For example, the firing scraper may have a built-in sensor, such as an accelerometer, or a strain gauge. Alternatively, the firing scraper may be mounted on a retaining device having a built-in sensor. Alternatively, the retaining device may be fixed to a roller crusher frame in a fixed position and a sensor may be disposed in or at said wiring position and configured to emit a firing signal in response to mechanical impact on the firing scraper. Thus, the term “firing scraper” should not be interpreted as meaning a type Petition 870250095186, dated 10 / 17 / 2025, page 51 / 150 38 / 101 special scraper itself. A firing scraper may be identical to any other scraper disclosed in the present invention. The term is used, instead, to identify a specific scraper among at least one scraper, which specific scraper is configured to act as a detection means to provide pertinent information on material buildup. This can be accomplished in different ways provided that the mechanical interaction between the accumulated material and the firing scraper is converted into an output signal.

[00114] According to an embodiment of the second aspect of this disclosure, such a firing scraper, positioned at a maximum distance from the flange and / or the outer surface at the end of the roller, is configured to initiate a signal to a roller crusher control system, which signal may involve initiating a planned service shutdown to change at least two consecutive scrapers.

[00115] According to a third aspect of the disclosure, a roller crusher is provided having two generally parallel rollers arranged to rotate in opposite directions, towards each other, and separated by an opening, each roller having two ends, the roller crusher comprising:

[00116] A flange fixed at least at one end of one of the rollers,

[00117] The flange extending in a radial direction from the roller,

[00118] The flange having a height above an outer surface of the roller and Petition 870250095186, dated 10 / 17 / 2025, page 52 / 150 39 / 101

[00119] A structured motion locking arrangement designed to limit the opening between the rollers to a minimum opening of at least 45 mm.

[00120] Wherein the roll crusher further comprises at least one scraper positioned at one end of the roll with a flange, and wherein the scraper is positioned such that a minimum roll distance between the at least one scraper and the outer surface of the roll is at least 70% of the minimum opening.

[00121] The third aspect of the roll crusher can be advantageous as it allows for the selective removal of accumulated material only to the extent necessary to avoid any detrimental effects that the buildup might have on the flange and edges of the opposite roll crusher. Selective removal of only the material that absolutely needs to be removed is beneficial for several reasons. Firstly, the overall wear of at least one scraper will be reduced since at least one scraper is exposed to a significantly lower degree of wear when positioned further away from the roll surface. Furthermore, it is well known that the risk of unplanned scraper malfunction, such as severe and instantaneous structural damage to the scraper and / or even a tear of the scraper from the roll crusher, will increase with decreasing distance from the roll surface.This is because the mechanical stress, at least on a scraper, will be significantly increased when located close to the roller surface. Therefore, the inventive concept is also associated with a prolonged lifespan of at least [duration not specified]. Petition 870250095186, dated 10 / 17 / 2025, page 53 / 150 40 / 101 a scraper and a reduced risk of unplanned malfunction events during operation. Avoiding these unplanned malfunction events is advantageous as it reduces overall downtime and, importantly, reduces the risk of unplanned blockage in the plant's material chain, an unplanned blockage that will typically require an unplanned and sometimes challenging shutdown of several adjacent processing machines in the plant to prevent excess feed material from accumulating in the closed roll crusher.

[00122] As readily recognized by those skilled in the art, to avoid any detrimental effects of accumulated material on the roll crusher, the greatest possible distance between the scraper and the roll surface will be equal to the minimum opening. At this limit, the scraper will be able to remove sufficient material to allow the two rolls to move relative to each other without risking the accumulated material detrimentally affecting the flange and edges of the opposite crusher roll, for example, by impact or compressive forces. However, since scrapers are constantly subjected to wear during operation, positioning the scraper at this distance may not be preferable, because scraper wear will effectively remove material from the scraper, consequently increasing the distance with increasing crusher operating time.It was observed from extensive testing that placing a scraper at a minimum distance from the roller with the flange (i.e., the roller where material accumulation occurs) is at least 70% of the opening. Petition 870250095186, dated 10 / 17 / 2025, p. 54 / 150 41 / 101 minimum, the roll crusher can be in operation for economically acceptable periods of time, the scraper has been worn to a point where the distance between the scraper and the outer surface of the roll will be close to the minimum opening and the scraper has to be adjusted into position or replaced.

[00123] The term “motion locking arrangement” should be interpreted as any arrangement in a roll crusher that is capable of physically preventing the rolls from getting closer to each other than that specified by the minimum opening. For roll crushers where only one roll is movable relative to the crusher frame, the motion locking arrangement can act only on the movable roll. The motion locking arrangement can be implemented, for example, by providing mechanical locking elements arranged in bearing housings that support a movable roll in the frame. However, as readily recognized by those skilled in the art, there are many alternative means of providing such mechanical motion locking. The motion locking arrangement can be structured and arranged to be adjustable so as to allow adjustment of the minimum opening.

[00124] According to one embodiment, at least one scraper is positioned so that a minimum flange distance between at least one scraper and an inner flange surface is 1-25 mm.

[00125] Preferably, the method further comprises positioning the scraper so that a minimum flange distance between at least one scraper and an inner flange surface is at least 11 mm. Petition 870250095186, dated 10 / 17 / 2025, page 55 / 150 42 / 101

[00126] According to one embodiment, at least one scraper is positioned so that a minimum flange distance between at least one scraper and an inner flange surface is 15-20 mm.

[00127] This modality is associated substantially with the same advantages that were detailed with reference to the first aspect. Specifically, by allowing a distance of at least 11 mm to the flange, the risk of flange bending was considered to be significantly reduced. Flange bending is undesirable as it will allow material to slide out from the crusher opening on the sides, consequently leading to parts of the material deviating from the roll crusher, with the end result that the material exiting the roll crusher will not have the specified size distribution.

[00128] According to one embodiment, the motion-blocking arrangement is structured and arranged to limit the opening between the rollers to a minimum opening of at least 50 mm. It is also conceivable that the motion-blocking arrangement is structured and arranged to limit the opening between the rollers to a minimum opening of at least 55 mm, or at least 60 mm, or at least 65 mm, or at least 70 mm. As readily recognized by those skilled in the art, the minimum opening may depend on many factors, such as, for example, the dimensions of the crushing rollers and / or the dimensions and material properties of the material to be crushed.

[00129] According to a fourth aspect of the disclosure, a method is provided for arranging a crusher. Petition 870250095186, dated 10 / 17 / 2025, p. 56 / 150 43 / 101 roller crusher, whose roller crusher has two generally parallel rollers arranged to rotate in opposite directions, one towards the other and separated by an opening, each roller having two ends, the roller crusher comprising:

[00130] A flange fixed at least at one end of one of the rollers,

[00131] The flange extending in a radial direction from the roller,

[00132] The flange having a height above an outer surface of the roller and

[00133] A structured and arranged motion locking arrangement to limit the opening between rollers to a predetermined minimum opening, wherein the method comprises:

[00134] Position at least one scraper at one end of the roller with a flange so that a minimum roller distance between the at least one scraper and the outer surface of the roller is less than or equal to the minimum opening.

[00135] The fourth aspect is generally associated with the same advantages as the first aspect. However, it is emphasized that the method is applicable to, and suitable for application to, any roll crusher regardless of dimensions. This suggests that the method is applicable and suitable for application to roll crushers of arbitrary roll dimensions, operated in arbitrary minimum opening settings and starting opening settings.

[00136] According to a modality of the fourth aspect, the method additionally comprises positioning the hair Petition 870250095186, dated 10 / 17 / 2025, p. 57 / 150 44 / 101 minus a scraper at one end of the roller with a flange such that a minimum roller distance between at least one scraper and the outer surface of the roller is within the range of 70 - 100% of the minimum opening.

[00137] According to an embodiment of the fourth aspect, the method further comprises positioning the scraper so that a minimum flange distance between at least one scraper and an inner flange surface is 125 mm.

[00138] Preferably, the method further comprises positioning the scraper so that a minimum flange distance between at least one scraper and an inner flange surface is at least 11 mm.

[00139] Preferably, the method further comprises positioning the scraper so that a minimum flange distance between at least one scraper and an inner flange surface is 15 - 20 mm.

[00140] According to one embodiment of the method, the motion locking arrangement is structured and arranged to limit the opening between the rollers to a minimum opening of at least 45 mm.

[00141] Similarly and correspondingly to the first aspect of the disclosure above, each of the second, third, and fourth aspects of the disclosure will provide substantial advantages over solutions of the prior art.

[00142] Other objectives, features and advantages of the present disclosure will appear from the following detailed disclosure, from the appended claims as well as the Petition 870250095186, dated 10 / 17 / 2025, p. 58 / 150 45 / 101 from the drawings. Note that the revelation refers to all possible combinations of resources.

[00143] Generally, all terms used in the claims should be interpreted according to their common meaning in the technical field, unless explicitly defined otherwise herein. All references to “a / an / the [element, device, component, means, step, etc.]” ​​should be interpreted broadly as referring to at least one instance of said element, device, component, means, step, etc., unless explicitly stated otherwise. The steps of any method disclosed in the present invention do not have to be performed in the exact order disclosed, unless explicitly stated.

[00144] As used in the present invention, the term comprising and variations thereof are not intended to exclude other additives, components, wholes or steps. BRIEF DESCRIPTION OF THE DRAWINGS

[00145] The disclosure will be described in more detail with reference to the attached schematic drawings, which show an example of a currently preferred embodiment of the disclosure.

[00146] Figure 1 is a perspective view of a roller crusher according to the prior art.

[00147] Figure 2A is a schematic top view of two rolls of the roll crusher in Figure 1.

[00148] Figure 2B is a schematic top view of two rolls of a prior art roll crusher according to an alternative embodiment. Petition 870250095186, dated 10 / 17 / 2025, p. 59 / 150 46 / 101

[00149] Figure 3A is a top cross-sectional view of segments of a roller crusher according to the prior art.

[00150] Figure 3B is a side cross-sectional view of segments of a roll crusher according to an embodiment of the disclosure.

[00151] Figure 3C is a top view of parts of a roll crusher according to an embodiment of the disclosure.

[00152] Figure 4A is a partially sectional side view of a roll crusher according to an embodiment of the disclosure.

[00153] Figure 4B is a partially sectional side view of a roll crusher according to another embodiment of the disclosure.

[00154] Figure 4C is a partially sectional side view of a roll crusher according to another embodiment of the disclosure.

[00155] Figure 4D is a partially sectional side view of a roller crusher according to another embodiment of the disclosure.

[00156] Figure 5A is a partially sectional side view illustrating the relative dimensions of the scraper rollers of Figure 4A.

[00157] Figure 5B is a partially sectional side view illustrating the relative dimensions of the roller crusher scrapers in Figure 4D. Petition 870250095186, dated 10 / 17 / 2025, p. 60 / 150 47 / 101

[00158] Figure 6 is a perspective view of a scraper and a retaining device for mounting the scraper on a roll crusher according to an embodiment of the disclosure.

[00159] Figure 7 is a perspective view of three scrapers and their associated devices of Figure 6 mounted consecutively relative to each other on a roller with a flange of a roller crusher according to an embodiment of the disclosure.

[00160] Figure 8 is a perspective view of two pairs of consecutive scrapers mounted on a common device in a roll crusher according to another embodiment of the disclosure.

[00161] Figures 9A-C are partially sectional side views of a roll crusher according to another embodiment of the disclosure illustrating a removal of accumulated material using an air knife in three consecutive time positions.

[00162] Figure 10 is a partially sectional side view of a roll crusher according to another embodiment of the disclosure.

[00163] Figure 11 is a partially sectional side view of a roll crusher according to another embodiment of the disclosure.

[00164] Figure 12 is a schematic side view of a monitoring system for a roll crusher.

[00165] Figure 13A is a perspective view of a material removal system comprising a scraper. Petition 870250095186, dated 10 / 17 / 2025, p. 61 / 150 48 / 101 mechanical and an air knife according to a mode of revelation.

[00166] Figure 13B is a perspective view of the material removal system in Figure 13A.

[00167] Figure 13C is a side view of the section illustrated in Figure 13B along with parts of a flanged roller.

[00168] Figure 14A is a perspective view of a scraper for a roll crusher according to an embodiment of the disclosure.

[00169] Figure 14B is a top view of parts of a roll crusher according to an embodiment of the disclosure.

[00170] Figure 14C is an exploded view of the scraper in Figure 14A.

[00171] Figure 15A is a perspective view of a scraper for a roll crusher according to an embodiment of the disclosure.

[00172] Figure 15B is a top view of parts of a roll crusher according to an embodiment of the disclosure.

[00173] Figure 15C is an exploded view of the scraper in Figure 15A.

[00174] Figure 16 is a perspective view of two scrapers mounted on a common device in a roll crusher according to another embodiment of the disclosure. DETAILED DESCRIPTION Petition 870250095186, dated 10 / 17 / 2025, p. 62 / 150 49 / 101

[00175] The present disclosure will now be described more fully hereafter with reference to the attached drawings, in which currently preferred embodiments of the disclosure are shown. The present disclosure may, however, be embodied in many different forms and should not be interpreted as being limited to the embodiments set forth herein; rather, these embodiments are provided for thoroughness and perfection, and to fully convey the scope of the disclosure to the discerning recipient. Similar reference characters refer to similar elements from beginning to end.

[00176] As discussed in the preceding part of this disclosure, the arrangement of the flanges in relation to the ends of the crushing rolls (as shown in Figure 2A and further discussed below), one flange at each end of one of the crushing rolls (as shown in Figure 2A and further discussed below) or one flange on each crushing roll (as shown in Figure 2B and further discussed below), the crushing effect along the length of the crushing rolls is maintained. However, these flanges and also the edges of the opposite crushing roll are under considerable stress and wear during operation of the crushing roll due to the accumulation of crushed material at the transition between the flange and an external surface of the roll crusher.The previous technique suggested a scraper element to remove the buildup of material, however an objective of the present disclosure is to proceed from there and ensure that flanges and edges of opposing roll crushers are subjected to less stress and wear while at the same time ensuring effective buildup removal. Petition 870250095186, dated 10 / 17 / 2025, p. 63 / 150 50 / 101 of material as well as economically acceptable operating time periods of the roll crusher without needing to adjust the position or replace any scrapers on the roll crusher.

[00177] With reference to figures 1, 2A, 2B, 4A, 4B, 4C, 4D, 5A, 5B, 7, 8, 10, this is achieved, wholly or at least in part, by a roller crusher 1 having two generally parallel rollers 3, 4, 3', 4' arranged to rotate in opposite directions, one towards the other, and separated by an opening G (see figure 3A), each roller having two ends. The roller crusher 1 further comprises a flange 36, 36' fixed at least to one end of one of the rollers 3, 4, 3', 4', which flange 36, 36' extends in a radial direction from the roller 3, 4, 3', 4' and has a height above an outer surface 37, 37' of the roller 3, 4, 3', 4'. The roller crusher 1 further comprises at least one scraper 100, 200, 300, 100a, 100b, 100c, 100d, 100t disposed at one end of the roller 3, 4, 3', 4' with a flange 36, 36' for removing at least partially accumulated material on the flange 36, 36' and / or on the outer surface 37, 37' at the end of the roller 3, 4, 3', 4'.

[00178] With reference to figures 1, 2A, 2B, 4A, 4B, 4C, 4D, 5A, 5B, 7, 8, 10, this is also achieved, wholly or at least in part, by a method for operating a roller crusher 1 for crushing granular material, wherein the roller crusher 1 has two generally parallel rollers 3, 4, 3', 4' arranged to rotate in opposite directions, one towards the other and separated by an opening G, each roller having two Petition 870250095186, dated 10 / 17 / 2025, p. 64 / 150 51 / 101 ends, the roller crusher 1 further comprises a flange 36, 36' fixed at least at one end of one of the rollers 3, 4, 3', 4', which flange 36, 36' extends in a radial direction from roller 3, 4, 3', 4' and has a height above an outer surface 37, 37' of roller 3, 4, 3', 4'. The roller crusher 1 further comprises at least one scraper 100, 200, 300, 100a, 100b, 100c, 100d, 100t disposed at one end of roller 3, 4, 3', 4' with a flange 36, 36'. The disclosed method comprises at least one step of removing at least partially accumulated material on the flange 36, 36' and / or on the outer surfaces 37, 37' at the end of the roller 3, 4, 3', 4' by means of at least one scraper 100, 200, 300, 100a, 100b, 100c, 100d, 100t.

[00179] For some example embodiments, two or more scrapers 100, 100a, 100b, 100c, 100t are provided arranged consecutively to each other at one end of the roller 3, 4, 3', 4' with a flange 36, 36'. The arrangement of at least two consecutively arranged scrapers 100, 100a, 100b, 100c, 100d, 100t allows for extended operating time. The scraper 100, 100a, 100c that first encounters the accumulated material (herein called: the “front scraper” or “first in line scraper”) will be exposed to significant wear. Over time, the material of the front scraper 100, 100a, 100c will therefore gradually wear away as a result of wear, consequently increasing the distance between the front scraper 100, 100a, 100c and the roller surface 37, 37' and / or flange 36, 36'. As the wear process occurs gradually, the scraper 100, 100b, 100c, 100d, 100t arranged Petition 870250095186, dated 10 / 17 / 2025, page 65 / 150 52 / 101 consecutively a, and behind the front scraper 100, 100a, 100c (herein referred to as the “second scraper” or “next first scraper”) will be increasingly exposed to accumulated material and thus gradually assume more and more of the task that the front scraper 100, 100a, 100c performed when the scrapers were new. The gradual transfer of scraping responsibility from the front scraper 100, 100a, 100c to the next first scraper 100, 100b, 100c, 100d, 100t thus allows for extended operating time before the scrapers have to be replaced, thereby reducing downtime of the roll crusher 1 and contributing to the overall efficiency of the plant.

[00180] However, the disclosure should not be interpreted as limited to the provision of two or more scrapers at one end of the roller with a flange. As will be detailed later in the present invention, the inventive concept will also be implemented with one scraper at one end of the roller with a flange. Exemplary embodiments with only one scraper at one end of the roller with a flange will be described with reference to Figures 11 to 16.

[00181] Figure 1 shows a roller crusher 1 according to the prior art. Such a roller crusher 1 comprises a structure 2 in which a first fixed crusher roller 3 is arranged in bearings 5, 5'. The bearing housings 35, 35' of these bearings 5, 5' are fixedly attached to the structure 2 and are thus immobile. A second crusher roller 4 is arranged in the structure 2 in bearings 6, 6' which are arranged in the structure 2 in a mobile, sliding manner. The Petition 870250095186, dated 10 / 17 / 2025, page 66 / 150 53 / 101 bearings 6, 6' can move in structure 2 in a direction perpendicular to a longitudinal direction of the first and second crusher rollers 3, 4. Typically, a guide structure 7, 7' is arranged in the structure on the first and second sides 50, 50' along upper and lower structural elements 12, 12', 13, 13' of the roller crusher 1. The bearings 6, 6' are arranged in movable bearing housings 8, 8' that can slide along the guide structure 7, 7'. Additionally, a number of hydraulic cylinders 9, 9' are arranged between the movable bearing housing 8, 8' and the first and second end supports 11, 11' which are arranged near or at a first end 5' of the roller crusher 1. These end supports 11, 11' fix the upper and lower longitudinal structural elements 12, 12', 13, 13' and also act as support for the forces that occur in the hydraulic cylinders 9, 9' as these are adjusting the opening width and reacting to forces that occur in the crusher rollers due to the material fed into the roller crusher 1.

[00182] These roller crushers operate according to a technique called interparticle crushing. The crushing rollers 3, 4 rotate in opposite directions to each other as schematically illustrated in Figure 1 using the arrows. The gap between the crushing rollers 3, 4 is adjusted by the interaction of the feed load and the hydraulic system effecting the position of the second crushing roller 4. As shown in Figure 1 and also in Figure 2A which shows the rollers 3, 4 from above, one of the crushing rollers 3 additionally comprises flanges 36, 36' arranged at the ends. Petition 870250095186, dated 10 / 17 / 2025, p. 67 / 150 54 / 101 opposite the grinding roll 3, wherein each flange 36, 36' has an outer edge that extends to a height H (see figure 3A) radially beyond the outer surface 37 of the grinding roll body 3 and positioned axially outward from the opposite grinding roll body 4.

[00183] Another prior art roller crusher is disclosed, for example in WO2013 / 156968, in which each of the crushing rollers with bearings is arranged in interconnected arc-shaped structural sections, wherein each interconnected arc-shaped structural section is articulatedly connected to a base frame. The matter disclosed in that disclosure is equally applicable in such an arrangement of a prior art roller crusher.

[00184] As also illustrated in Figure 3A, each flange 36 is arranged at one end of roller 3 so that an inner surface 39 of flange 36 is situated at a distance F from the end of the opposite roller 4. The distance F is necessary to avoid contact between flange 36 and roller 4 which could lead to material damage. At the same time, the distance F should not be too large, as this increases the risk of material escaping from the roller crusher through the opening thus formed. The distance F can be achieved by mounting flange 36 on roller 3 using shims 15, better illustrated in Figure 3A. The purpose of the flanges 36, 36 is to prevent material from escaping the opening at its end, thus forcing all material entering the roller crusher to pass through the crushing opening to be crushed. An alternative embodiment of a roller crusher Petition 870250095186, dated 10 / 17 / 2025, p. 68 / 150 The 55 / 101 with flanges is illustrated in Figure 2B. The only difference between the two embodiments is that the roller crusher in Figure 2B has flange 36 disposed on the second crushing roller 4 instead of the first crushing roller 3', meaning that each of the crushing rollers 3', 4' has a flange 36, 36' each. As readily recognized by those skilled in the art, the technical effect of preventing material from exiting the crusher 1, 1' at the ends of the opening will be equally well achieved for the two embodiments disclosed. Importantly, the disclosed inventive concept is equally applicable to these two embodiments.

[00185] As previously mentioned, the gap between rollers 3, 4 can be adjusted. For crushing operation, the roller crusher 1 is preset to have a specific distance between the rollers, called the starting gap G. This is illustrated in Figure 3A. The starting gap G is selected based on several different factors, such as the size of the roller crusher (i.e., crushing roller diameter), the desired properties of the crushed material, etc. The starting gap G can be in the range of 10 to 140 mm. However, typically, the starting gap G is in the range of 60 to 90 mm.

[00186] The roller crusher further comprises a motion-locking arrangement 20 structured and arranged to limit the opening between the rollers to a minimum opening M. There are many different ways to provide such a motion-locking arrangement known in the art and, therefore, it is not discussed in detail herein. Petition 870250095186, dated 10 / 17 / 2025, p. 69 / 150 56 / 101 invention. A common solution, which is the solution illustrated in Figure 1, is to provide a pair of mechanical engagement elements 20a, 20b in the bearing housings 35, 35'. The minimum opening M may be relatively small for some roll crushers and / or materials to be crushed, such as in the range of 10 to 30 mm. However, typically, the minimum opening M is at least 45 mm. However, it is conceivable that the minimum opening may be larger, such as, for example, at least 55 mm, or at least 60 mm, or at least 65 mm, or at least 70 mm.

[00187] As initially described, a problem with this type of crushing assembly is that material tends to accumulate at corner 40 (see Figure 3A) between the outer surface 37 of the crushing roll 3 and the inner surface 39 of the flange 36, 36'. Such material accumulation 41 is schematically illustrated in Figure 3A for the roll crusher 1 of Figures 1 and 2A, and is generally undesirable as it generates increased local loads in this area during operation, which can cause wear, damage and / or deformation to the opposite crushing roll 4 which does not have a flange. To provide a solution to this problem, a means is provided for removing at least a portion of this accumulated material 41. The present disclosure relates to two such different means, mechanical scrapers and a remote material removal device. Mechanical scrapers will be discussed with reference to figures 2 to 8, 14 to 16, and the remote material removal device will then be discussed with reference to figures 9 to 13.

[00188] Figure 3B illustrates a mechanical scraper 100 according to an embodiment of the revelation in a view Petition 870250095186, dated 10 / 17 / 2025, page 70 / 150 57 / 101 front. The mechanical scraper 100 is fixed to the roll crusher, for example, to the frame or other support feature, but is illustrated here in isolation from the crusher rolls for clarity. The mechanical scraper 100 comprises two wear members 102a, 102b arranged at one end of the scraper 100 so as to define a scraping surface 104 generally facing the material to be removed. The statement “generally facing the material to be removed” suggests that the scraping surface 104 is arranged substantially tangentially to the roll surface. The wear members 102a, 102b are fixed to the main scraper body 103 (not visible in the front view of Figure 3B, but can be seen in Figure 3C).As illustrated in Figure 3C, which shows the scraper 100 of Figure 3B in a top view together with parts of a roller 3 with a flange 36 rotating towards the scraper 100 as indicated by the arrow showing the tangential speed of the rotating roller 3, the wear members 102a, 102b can be arranged on the main scraper body 103 so that the scraping surface 104 of the scraper 100 is arranged to incline in relation to a normal N with respect to the inner surface 39 of the flange 36 and incline so that a distance L1 between the normal N with respect to the inner surface 39 of the flange 36 and the scraping surface 104 decreases towards the flange 36. The normal N is defined as a line that is orthogonal to a plane defined by the inner surface 39 of the flange 36. This allows the material to be more easily transported away from the corner 40 between the inner surface 39 of the flange and a. Petition 870250095186, dated 10 / 17 / 2025, page 71 / 150 58 / 101 outer surface 37 of roller 3 after scraping, thus contributing to an efficient material removal process.

[00189] The nature of the material buildup 41 and the speed at which at least one mechanical scraper 100 and the material buildup 41 meet tend to make material removal substantially impact-driven. Consequently, instead of the scraper eventually creating a notched recess in the accumulated material, large portions of the surface of the material buildup 41 are more or less instantaneously broken off upon encountering the scraper. This is illustrated schematically in Figures 3B and 3C. The remaining portion of the material buildup 41 has been found to have a relatively uniform outer surface. It is not necessary to completely remove the material buildup 41. Preferably, only parts of the buildup 41 should be removed. Partial removal of the material buildup 41 will reduce the overall wear of the scraper 100 since it is exposed to a significantly lower degree of wear when positioned further from the roller surface 37.It has been observed that a preferred position for scraper 100 may be when scraper 100 is positioned such that a minimum roller distance S1 between each of at least one scraper 100 and the outer surface 37 of roller 3 is at least 70% of the minimum opening M. The minimum roller distance S1 is defined in Figure 3B. It should be noted that for the example embodiment illustrated in Figure 3B, scraper 100 is structured and arranged so that the distance between scraper 100 and the outer surface 37 of roller 3 is substantially constant. This suggests that the minimum roller distance S1... Petition 870250095186, dated 10 / 17 / 2025, p. 72 / 150 59 / 101 will coincide with the aforementioned substantially constant distance. However, for other undisclosed embodiments, the scraper may be structured and / or arranged so that the distance between the scraper 100 and the outer surface 37 of the roller 3 varies. For such an embodiment, the minimum roller distance S1 will be the shortest distance between the scraper and the outer surface 37 of the roller 3. In this position of the scraper 100 with a minimum roller distance S1, the roller crusher 1 may be in operation for economically acceptable periods of time before the scraper 100 has been worn to a point where the distance between the scraper 100 and the outer surface 37 of the roller becomes close to the minimum opening M and the scraper 100 has to be adjusted in position or replaced. As illustrated in Figure 3B, the scraper 100 is positioned at a minimum flange distance S2 from the inner surface of the flange 26.As can be seen in Figures 3A and B, this minimum flange distance S2 is greater than the distance F between roller 4 and the inner surface 39 of flange 36. This may seem somewhat surprising, as one might expect that scraper 100 could lose material that needs to be removed to completely avoid contact between roller 4 and material buildup 41. However, positioning scraper 100 closer to flange 36 is associated with other disadvantages. Firstly, it increases the risk of scraper 100 being damaged by flange 36 and / or material buildup 41 on flange 36, a risk that increases with decreasing distance to any moving surface. Secondly, it increases the risk of damaging flange 36 itself. By positioning scraper 100 a. Petition 870250095186, dated 10 / 17 / 2025, page 73 / 150 60 / 101 a minimum flange distance S2 being greater than the distance F, a reasonable exchange is obtained. A sufficient amount of material is removed from the accumulated material 41 on flange 36, while keeping the scraper 100 at a safe distance from the flange, resulting in a prolonged scraper life as well as flange life. Preferably, the scraper 100 is positioned so that a minimum flange distance S2 between at least one scraper 100 and an inner surface 39 of flange 36 is 1-25 mm. More preferably, the scraper 100 is positioned so that a minimum flange distance S2 between at least one scraper 100 and an inner surface 39 of flange 36 is at least 11 mm. It has been found that the risk of damage to the flange is significantly reduced at this distance.Needless to say, flange bending is undesirable as it will allow material to slide out from the crusher opening on the sides, consequently leading to parts of the material deviating from the roll crusher, with the end result that the material exiting the roll crusher will not have the specified size distribution.

[00190] The scraper 100 is illustrated only schematically in figures 3B and 3C to allow defining the preferred position of the scraper 100 in relation to the roll crusher 1, or more specifically, in relation to the roll surface 37 and / or flange 36. Returning instead to figures 4 to 8, it will be described in detail how scrapers, such as the scraper 100 of figure 3B, can be used in combination in a roll crusher. Petition 870250095186, dated 10 / 17 / 2025, p. 74 / 150 61 / 101

[00191] Figures 4A to D illustrate four different example embodiments of a scraper assembly for a roll crusher. For each scraper included in these assemblies, the preferred positioning described above can be applied with reference to scraper 100 in Figure 3B. In describing the example embodiments, the focus will instead be placed on the differences between the individual scrapers with respect to positioning as well as other properties.

[00192] Figure 4A illustrates a scraper assembly 1000 according to a first embodiment of example. The scraper assembly 1000 consists of two scrapers 100a, 100b arranged consecutively to each other at one end of the roller 3 with flange 36. The scrapers 100a, 100b are positioned relative to the roller 3 so that the scraper is situated at the same or substantially the same minimum distance from the roller surface 37 (in other words: the same minimum distance from roller S1, see figure 3B). Additionally, the scrapers 100a, 100b are positioned so that the scraper is situated at the same or substantially the same minimum distance from flange 36 (in other words: the same minimum distance from flange S2, see figure 3B).Thus, for the 1000 scraper assembly, the front scraper, i.e., scraper 100a, at least in the first period after installation of the 100 scraper assembly, will be the only scraper actually performing any material removal. This is illustrated in Figure 4A by the front scraper 100a removing material 60a. Scraper 100b will act as a simple backup scraper in case of scraper failure. Petition 870250095186, dated 10 / 17 / 2025, page 75 / 150 62 / 101 front 100a. This is advantageous because it extends the operating time before the crusher needs to be shut down for replacement.

[00193] With time in operation, the wear elements 102a, 102b of the front scraper 100a will gradually wear out, thus effectively moving the scraper “away” from the roller surface 37 and / or inner surface 39 of the flange 36. This wear process will lead to more and more material from the material buildup 41 not being removed by the first scraper 100a, resulting in an increasing thickness of the material buildup 41 advancing towards the second scraper 100b. Since the second scraper 100b was initially positioned in the same relative position with respect to the roller surface 37 and flange 36 as the front scraper 100a, it has been protected against wear by the front scraper 100a to date. This means that the second scraper 100b will at this time still maintain its original minimum distance from the roller surface 37.Consequently, the second scraper 100b is now available to remove excess material that the worn front scraper 100a is no longer able to remove. In this way, the worn second scraper 100b will become increasingly important for the overall removal of material from the scraper assembly 100. The scraper 100b thus starts in the role as a simple spare scraper and ends in the role of an operating scraper. The front scraper 100a and second scraper 100b can be individually mounted on a respective retaining device 110a, 110b which, in turn, can be mounted on the support structure 150, which can... Petition 870250095186, dated 10 / 17 / 2025, page 76 / 150 63 / 101 being a part of the roller crusher structure, or a support or supporting element attached to that structure. The retaining devices will be described in more detail later with reference to figure 5.

[00194] Figure 4B illustrates a scraper assembly 2000 according to a second embodiment. The scraper assembly 2000 differs from the first embodiment 100 only insofar as the scrapers 100a and 100b are arranged at different minimum distances from the roller surface 37 (in other words: they have different minimum roller distances S1) with the minimum roller distance S1 being smaller for the second scraper 100b than for the front scraper 100a. As readily recognized by those skilled in the art, this means that both the front scraper 100a and the second scraper 100b will remove material from the very beginning in the first operating period. This is illustrated in Figure 4B only by the front scraper 100a removing material 60a and the second scraper 100b removing material 60b. Consequently, the second example mode will share the technical effects that the first example mode exhibits after the initial time period.The front scraper 100a and second scraper 100b are preferably positioned to have the same or substantially the same minimum distance from the inner surface of the flange (i.e., in relation to the first embodiment of the example). However, it is also conceivable that the second scraper 100b be positioned so that a minimum distance between scraper 100a and the inner surface 39 of flange 37 is greater than the distance. Petition 870250095186, dated 10 / 17 / 2025, page 77 / 150 64 / 101 corresponding to the second scraper 100b (i.e., the minimum flange distance S2 is greater for the front scraper 100a than for the second scraper 100b). As readily recognized by those skilled in the art, such relative positioning provides a similar technical effect as already described for the different minimum roller distances S1.

[00195] Figure 4C illustrates a scraper assembly 3000 according to a third embodiment of the example. The scraper assembly 3000 differs from the second embodiment of the example only insofar as scrapers 100a and 100b are followed by yet another consecutively arranged scraper, third scraper 100c directly followed by a firing scraper 100t. As illustrated in Figure 4C, the first three scrapers 100a-c are arranged at different minimum distances from the roller surface 37 (in other words: they have different minimum roller distances S1), with the minimum roller distance S1 gradually decreasing for each consecutive scraper in the scraper line starting with the front scraper 100a. As readily recognized by those skilled in the art, this means that all three scrapers 100a-c will remove material right from the start of operation.This is illustrated in Figure 4C by the front scraper 100a removing material 60a, the second scraper 100b removing material 60b, and the third scraper 100c removing material 60c. The firing scraper 100t is positioned at the very end of the line of consecutive scrapers and is therefore acting as a rear scraper. The firing scraper 100t is positioned at a maximum tolerable distance T from the... Petition 870250095186, dated 10 / 17 / 2025, page 78 / 150 65 / 101 roller surface 37 and is configured to provide a firing signal in response to contact with the material buildup 41. In the example embodiment, this is achieved by means of a strain gauge 96 mounted on the retaining device 110t. Therefore, during normal operation of the roller crusher, the firing scraper 100t is not in contact with the material buildup 41. However, over time, the scrapers 100a-c will gradually wear out and as a result the material buildup 41 will gradually become thicker. When the accumulated material 41 reaches the maximum tolerable distance T, it will make contact with the firing scraper 100t. This will create mechanical stress on the retaining device 110t, which will be reflected in the signal emitted from the strain gauge 96. Monitoring this signal allows determining when the “acting scrapers”, i.e., the scraper 100a-c, have all reached the end of their lifespan and need replacement.Thus, a trigger signal from the tension meter 96 can be used to determine when the machine should be shut down for scraper replacement. Although not ideally intended, the 100t trigger scraper is still a scraper on its own. This means that if the roll crusher were operated some time after the 100t trigger scraper first induced a signal to shut down the crusher, the 100t trigger scraper would still provide scraping. Therefore, the 100t trigger scraper is more than just a sensor; it is also an extra backup scraper. To prevent damage to the rolls and / or flange, the maximum tolerable distance T can be chosen so that the roll crusher can be operated. Petition 870250095186, dated 10 / 17 / 2025, page 79 / 150 66 / 101 some time also after having started scraping with the firing scraper 100t. The term “firing scraper” should not be interpreted as meaning a special type of scraper per se. The 100t scraper may be identical to any other scraper disclosed in the present invention, such as scraper 100a, b, and c. The term is instead used to identify a specific scraper among at least one scraper whose specific scraper is configured to act as a means of detection to provide pertinent information on material buildup 41. This can be accomplished in different ways provided that the mechanical interaction between the accumulated material and the firing scraper is converted into an output signal.

[00196] Figure 4D illustrates a scraper assembly 4000 according to a fourth embodiment of the example. The scraper assembly 4000 differs from the second embodiment of the example in that scrapers 100a and 100b are here mounted on a common retaining device 410a which together with scrapers 100a and 100b form a first subassembly 400a of scrapers and that the scraper assembly 4000 further comprises a second subassembly 400b of scrapers comprising scrapers 100c and 100d, which second subassembly 400b is consecutively arranged with the first subassembly 400a. Each common retaining device 410a, 410b can be mounted on the support structure 450 which can be a part of the roller crusher structure, or a support or support element fixed to that structure. As can be seen in Figure 4D, the pair of scrapers in a subset is arranged at a minimum distance S1 from the surface. Petition 870250095186, dated 10 / 17 / 2025, p. 80 / 150 67 / 101 of roller. However, the minimum distance S1 for the first subassembly 400a is greater than the minimum distance S1 for the second subassembly 400b. As readily recognized by those skilled in the art, during the first crushing time period or operation, the first scraper 100a of subassembly 400a and the first scraper 100c of subassembly 400b will perform material removal in the same manner as previously described for scraper assembly 2000 of the second embodiment of the example. However, a difference between the fourth and second embodiments of the example is that the fourth embodiment of the example will provide spare scrapers in the form of a second scraper in line in each subassembly (i.e., scraper 100b for the first subassembly 400b, and scraper 100d for the second subassembly 400b). As scrapers 100a and 100c become worn, scrapers 100b and 100d will gradually come into operation.Thus, the fourth example embodiment provides both a reserve and a shared scraper. Another difference between the fourth example embodiment and the example embodiments described previously is that each subset of scrapers 400a, 400b constitutes its own unit. Specifically, the front scraper 100a and second scraper 100b of the first subset of scrapers 400a can be mounted on a common device 410a, and scrapers 100c and 100d of the second subset 400b of scrapers can be mounted on the common retention device 410b. The significance of the common retention device versus the single retention devices of the example embodiments previously will be described below. Petition 870250095186, dated 10 / 17 / 2025, p. 81 / 150 68 / 101

[00197] The four exemplary embodiments described above constitute different combinations or permutations of novel inventive aspects, such as the use of two or more scrapers, the use of backup scrapers, the use of scrapers together sharing the scraping operation, etc. Those skilled in the art realize that many other combinations of these inventive aspects are possible. For example, a firing scraper can be added to any of the other exemplary embodiments or any other exemplary embodiment included within the scope of protection of the claims. As another non-limiting example, two or more scrapers can be arranged with a minimum distance equal to the roller surface (minimum roller distance S1) but a variable minimum distance from the flange (minimum flange distance S2). The scrapers can also be positioned at different angular positions with respect to the geometric axis of rotation of the roller 3.It is conceivable to locate the scrapers at virtually any angular position along the roll, except at the opening. However, preferably, the scrapers are arranged in a lower part of the roll crusher. This suggests that the scrapers are arranged below a horizontal plane that intersects the geometric rotational axes R1, R2 of the two rolls 3, 4. Even more preferably, the scrapers are arranged so that the scraping surfaces of the scrapers are at least partially facing downwards to allow the removed material to exit from the roll and scraping surfaces by gravitational force. Preferably, the scrapers are arranged at approximately 6-9 o'clock, 7-9 o'clock. Petition 870250095186, dated 10 / 17 / 2025, p. 82 / 150 69 / 101 or 7 - 8 roller hours, when viewing roller 3 from one side showing clockwise rotation.

[00198] The retaining devices for the scrapers will now be described in detail with reference to figures 5A and B. Figure 5A illustrates the scraper assembly 1000 shown in figure 4A. Each scraper 100a, 100b can be fixed in a respective retaining device 110a, 110b, which in turn can be fixed in a support structure 150 at a fixing position P2 located at a distance 37 from the outer surface of the roller 3 by means of fasteners 120a, 120b. As illustrated in figure 4A, the retaining device 110a, 110b is shaped in a particular way. In particular, each scraper 100a, 100b is arranged in relation to the roll crusher 1 such that a position P1 of each scraping surface 104 of the scraper 100a, 100b is situated on, or consecutive to, a radial geometric axis A that extends from a rotational geometric axis R1 of the roll 3 and through the respective fixing position P2.This provision ensures that any unintentional movement of scraper 100a, 100b due, for example, to strong impact forces originating from interaction with accumulated material 41 will force the scraper to move away from the roller surface 37. This is indicated for scraper 100b in Figure 5A by the dashed lines illustrating how a broken retaining device 110b and its scraper 100b would rotate clockwise, consequently outwards around their fixing position P2, after being exposed to a strong impact force. This process suggests that... Petition 870250095186, dated 10 / 17 / 2025, page 83 / 150 70 / 101 fasteners 120b break at the fixing position P2. This represents a conceivable way of achieving the preferred effect, namely by intentionally designing a weak point at the fixing position P2. It is not necessary for the retaining device to be fixed in the fixing position. It is equally conceivable that the retaining device be hinged and fixed at the fixing position P2. To ensure that the scraper 100a, 100b is held in its intended position during operation, such hinged scrapers can be mechanically locked in said intended positions by means of a locking system such as a gear, cam or similar. An example of this will be given below.

[00199] Figure 5B illustrates the scraper assembly 4000 shown in Figure 4D. As previously described, scrapers 100a and 100b can be mounted here on the common retaining device 410a which together with scrapers 100a and 100b form a first subset 400a of scrapers. Similarly, scrapers 100c and 100d can be mounted on the common retaining device 410b which together with scrapers 100c and 100d form a second subset 400b of scrapers. Each common retaining device 410a, 410b can be fixed to the support frame 450 in a respective fixing position P3. The fastening for this type, however, differs from that for the scraper 3000 assembly. Instead of being rigidly fixed by means of fasteners 120a, 120b, the retaining devices 410a, 410b are instead articulated and extended towards a working position. This is achieved by means of fasteners 420a and 420b. Petition 870250095186, dated 10 / 17 / 2025, p. 84 / 150 71 / 101 respectively. The propensity must be of sufficient magnitude to hold the scrapers 100a-d in the working position until a predetermined threshold force. Again, such a predetermined threshold force is adjusted to ensure that the flanges and / or the outer surface at the end of the roll do not risk becoming damaged by a collision between a scraper and non-removable material. The propensity can be achieved by means of a spring. It is also conceivable to use a non-propensity pivoting fixture combined with a torque limiter. For such an embodiment, the retaining device would be apparently rigidly fixed to the roll crusher until the scrapers have been exposed to a force exceeding a certain threshold force at which the torque limiter is activated and the retaining device is allowed to oscillate the scrapers away from the roll surface. The torque limiter can be combined with a propensity means, such as a spring.

[00200] Discussing the second subassembly 400b, since more than one scraper is fixed to the same common retaining device, that retaining device should preferably be designed so that a position P1 of the two scrapers 100a, 100b is situated on, or consecutive to, a radial geometric axis A that extends from a rotational geometric axis R1 of the roller and through the common fixing position R3. This suggests that it should be ensured that scraping surfaces 104 of both scraper 100a and scraper 100b are situated on, or consecutive to, the radial geometric axis A. This will ensure that any movement Petition 870250095186, dated 10 / 17 / 2025, p. 85 / 150 72 / 101 unintentional scraper 100a, 100b due, for example, to strong impact forces originating from interaction with accumulator material 41 will force the scraper to move away from the roller surface 37. This is indicated for the second subset 400b of scrapers in figure 5b by the dashed lines illustrating how a broken first subset 400b of scrapers would rotate clockwise around its respective common fixing position, P3, and consequently outwards, after being exposed to a strong impact force.

[00201] Figure 6 illustrates the scraper 100, already described, together with a retaining device 510 according to another embodiment of example. The retaining device 510 may comprise a square beam 512 structure and arranged to be fixable to a support structure of the roller crusher. Fixed to the square beam 512 is the support 514 which has a fixing surface 516 with direct holes 518. The scraper 100 is fixable to the support 518 by means of the wedge element 520. The wedge element 520 has a first surface 522 configured to be fixable to the fixing surface 516 by fasteners such as, for example, dowels and screws and a second surface 524 on which the main body 103 of the scraper 100 is fixed, for example, by welding. Current CA 526 interconnects wedge element 520 with square beam 512 and acts as an extra safety measure.If a sudden impact force breaks the fastening between the wedge element 520 and the support 514, the chain 526 will prevent the scraper 100 and the wedge element 520 from falling into the... Petition 870250095186, dated 10 / 17 / 2025, p. 86 / 150 73 / 101 material outlet section of the roller crusher (not shown). This is advantageous as it can prevent damage to underlying structures such as conveyor belts, filters and chute surfaces, etc.

[00202] Figure 7 illustrates a scraper assembly 6000 consisting of three scrapers 100 mounted on respective retaining devices 510 already described with reference to Figure 6. The three scrapers 100 are arranged here consecutively relative to each other and the scraper assembly 6000 is intended to be arranged along a roller with a flange in the same manner as previously described with reference to Figures 4A to D to at least partially remove accumulated material on the flange and / or on the outer surface at the end of the roller. Each retaining device 510 is mounted on the roller crusher by means of a respective plate 620 which can be fixed to structural elements 610. The position of each scraper 100 is adjusted during installation by carefully adjusting the plate 620 before fixing it to the structural elements 620.The relative position between each scraper and the roller and / or flange surface can be selected in many different ways following what has been outlined previously with reference to figures 4A to D. Thus, it is conceivable that the 100 scrapers of the 6000 scraper assembly have an equal minimum roller distance, S1, to the roller surface 37, but they may alternatively have different minimum roller distances S2 to the roller surface 37. Similarly, it is conceivable that the 100 scrapers of the 6000 scraper assembly have a minimum flange distance. Petition 870250095186, dated 10 / 17 / 2025, page 87 / 150 74 / 101 equals S2 with respect to the inner surface 39 of flange 36, but they may alternatively have different minimum flange distances S2 with respect to the inner surface of the flange.

[00203] Figure 8 illustrates the scraper assembly 7000 according to yet another exemplary embodiment. The scraper assembly 7000 comprises four scrapers 100 arranged in pairs along both ends of a roller 3 having double flanges 36. Each scraper 100 of a pair is arranged consecutively to the other scraper 100 of that pair and may be mounted according to any of the combinations previously described or any combination not described included within the scope of protection of the claims. In particular, the scrapers 100 of a pair may have substantially the same minimum roller distances S1 and / or minimum flange distances S2 or may have different minimum roller distances S1 and / or minimum flange distances S2. The scrapers 100 are each mounted on a support structure 710 which in turn is mounted on the roller crusher structure.As readily recognized by the expert on the subject, the 7000 scraper assembly is structured and arranged to be positioned approximately 6 to 9 o'clock from roller 4, when viewing roller 4 from one side showing clockwise rotation.

[00204] Figures 9A to C illustrate a scraper assembly 8000 according to another exemplary embodiment. The scraper assembly 8000 comprises a scraper 100 and an air knife 800 arranged consecutively to each other at one end of the roller 3 with a flange 36 for at least partially removing Petition 870250095186, dated 10 / 17 / 2025, p. 88 / 150 75 / 101 accumulated material on flange 36 and / or on the outer surface 37 at the end of roller 3. From then on, the scraper 100 will be referred to here as “mechanical scraper 100” to clearly differentiate it from the air knife 800 which also removes material, but not by mechanical interaction (an air knife can be considered as a non-contact scraper). The air knife 800 is structured and arranged to, at least intermittently, direct a plume of pressurized air 820 towards a target area 822 located on the outer surface 37 at the end of roller 3. The air plume 820 provides sufficient air impact on the target area 822 to at least partially remove accumulated material on it. By the term “intermittently” it is meant here that the air knife directs a plume towards the target area at irregular or regular time intervals during operation of the roller crusher.This suggests that the air knife may not be in continuous or constant operation. However, for some applications and some modalities of the remote material removal device, the device may be in continuous or constant operation.

[00205] The air knife 800 comprises a main body 802 having an elongated extension. For the present embodiment, the main body 802 is disposed substantially horizontally in a lower part of the roll crusher. Pressurized air is supplied to the air knife 800 through piping 806 which are connected to a high-pressure air supply, 98. The air knife 800 will be described in more detail later. As readily Petition 870250095186, dated 10 / 17 / 2025, p. 89 / 150 76 / 101 recognized by the technician in the field, the material removal efficiency will depend both on the distance between an air knife outlet nozzle and the target area 822, and on the angle formed between the air plume 820 and the target area 822. The distance may be in the range of 50 - 500 mm from the target area 822.

[00206] The 800 air knife is an example of a fluid jet knife, which is an example of a class of devices that are capable of removing material from a distance. These devices are referred to here as “remote material removal devices”. These devices are configured to emit a material removal beam towards a target area, and the interaction between the material removal beam and the material present in said target area will at least partially remove said material. Depending on the type of remote material removal device, the material is removed by different processes, such as mechanical impact, heating, ablation, exothermic reactions, etc. Fluid jet knives make use of a high-velocity fluid to remove material by impact. Other examples of remote material removal devices are lasers, which can be used to remove material by laser heating and material ablation.Although the exemplary embodiments disclosed in the present invention are primarily focused on air knives, the inventive concept should not be interpreted as limited to them, and it is anticipated that any remote material removal device will be applicable. Petition 870250095186, dated 10 / 17 / 2025, pp. 90 / 150 A suitable alternative 77 / 101 can be used instead of an air knife in any of the example embodiments.

[00207] As illustrated in Figure 9A, the target area 822 of the air knife 800 is situated in front of the mechanical scraper 100. This means that when in operation, the accumulated material 41 on the flange 36 will encounter the target area 822 of the air knife 800 before encountering the mechanical scraper 100. Although the inventive concept is not limited to this particular order, it is considered a preferred order because the air knife 800 can then be used to remove extra hard and / or excessive amounts of accumulated material 41 on the flange 36 before said material impacts the mechanical scraper 100. As readily recognized by those skilled in the art, this reduces the risk of structural damage to the mechanical scraper 100.

[00208] One advantage of the air knife 800 over the mechanical scraper 100 is that the air knife 800 allows for control. This advantage is equally applicable to other remote material removal devices, such as lasers and fluid jet knives. In this way, the air knife can be used only in specific positions at the time when it is most needed. For this purpose, the air knife 800 can be connected to a control system. The control system can be or form part of a control system 80 for the roll crusher (illustrated as control system 80 in Figure 12), a control system for the scraper assembly 8000, or even an external system such as a common control system in the plant. When the roll crusher is started with clean rolls 3, 4 with no accumulated material 41 on the flanges Petition 870250095186, dated 10 / 17 / 2025, page 91 / 150 78 / 101 36, 36', the material, during an initial period of the crushing operation, will accumulate at the corner transition between the roller surface 37 and the flange 36, creating a material buildup 41. During the initial period after start-up, such as the first hour of operation, the material buildup 41 will be relatively soft through the depth of the material, and the mechanical scraper 100 will therefore be able to remove any excess buildup effectively at an acceptable wear rate of the mechanical scraper 100 and acceptable levels of mechanical stress on the retaining device 110, keeping the mechanical scraper 100 in place relative to the roller crusher. This time period and the operation of the scraper assembly 8000 during it is illustrated in Figure 9A.

[00209] After continuous operation of the roller crusher for a longer period of time, the material buildup 41 will become increasingly compacted and thus harden through the depth of the material. This will increase the wear rate of the mechanical scraper 100 as well as the levels of mechanical stress on the retaining device 110, thus increasing the risk of damaging the mechanical scraper 100. This problem can be solved by removing accumulated material before it becomes too hard, by means of the air knife 800. By applying an air plume 820 over the target area 822 located at one end of the roller 3 with a flange 36, the air plume 820 can remove, in part or in full, the material buildup 41 located in that place. By moving the material buildup 41, the wear life of the mechanical scraper 100 and its Petition 870250095186, dated 10 / 17 / 2025, page 92 / 150 79 / 101 retention device 110 will be enlarged, thereby providing a safer system for keeping the accumulated material 41 on the flange at acceptable levels. This is illustrated in figures 9B and C showing the beginning of (figure 9B) and the last phase of (figure 9C) a substantially complete removal of the accumulated particles 41 using the air knife 800. As indicated in figure 9C, the removal material 60a can be guided into a dedicated container 99. The container 99 can be advantageous as it allows for a reduction in dust cloud formation in the roll crusher during use of the air knife.

[00210] The air knife 800 can be functionally connected to a control unit. In one example embodiment, the air knife 800 is functionally connected to a control unit 80 of the roll crusher. This is illustrated in Figure 12. The air knife 800 can be controlled in different modes. For example, the air knife 800 can be switched on at predetermined time intervals, such as every 3, 4 or 5 rotation of roll 3. Alternatively, the air knife 800 can be switched on at time positions determined by data from the roll crusher monitoring system relevant to the level of accumulated material on the flange 36 and / or on the outer surface 37 at the end of roll 3. Such data from the roll crusher monitoring system can be obtained by means of a roll crusher monitoring system 90, as will be further described later.It is also preferable to turn on the 800 air knife for a period of time before closing the roller crusher to allow the accumulated material on flange 36 and / or the surface to be reground. Petition 870250095186, dated 10 / 17 / 2025, page 93 / 150 80 / 101 external 37 at the end of the roller 3. By removing the accumulated material 41 before closing, the maintenance of the mechanical scrapers (such as scraper 100), such as replacement, adjustment or inspection thereof, will be easier.

[00211] Included in the inventive concept are several conceivable combinations of mechanical scrapers and remote material removal devices. Specifically, any combination of mechanical scrapers discussed with reference to Figures 4 to 8 can be combined with a remote material removal device, such as, for example, an air scraper. Serving only as non-limiting examples, Figure 10 illustrates a scraper assembly 8000' according to an alternative embodiment. The scraper assembly 8000' differs from the scraper assembly 8000 of Figure 9 as follows: Firstly, instead of a single mechanical scraper, the scraper assembly 8000' has three consecutively arranged scrapers 100a, 100b and 100t, of which the first two scrapers 100a, 100b are working scrapers and the last scraper 100t is a firing scraper. The functionality of the 100t firing scraper was detailed with reference to Figure 4C and will not be repeated here.The two working scrapers 100a, 100b are arranged similarly to those described previously with reference to Figure 4A, that is, so that the minimum roller distance S1 for scraper 100a is substantially equal to the minimum roller distance S1 for scraper 100b. An additional difference is that, instead of an air knife, the remote material removal device in scraper assembly 8000 is a high-energy laser. Petition 870250095186, dated 10 / 17 / 2025, p. 94 / 150 In the example embodiment, a high-energy continuous-wave CO2 laser is used, although other high-energy lasers, preferably pulsed, are also conceivable. The material removal beam, which here constitutes laser beam 820', is directed to the target area 822' and removes the accumulated material by laser ablation. It may be necessary to move (i.e., sweep) the laser beam during operation to adequately remove the material buildup. This can be achieved by an optical system based on lenses and / or mirrors and is well known in the art.

[00212] Figure 11 illustrates yet another non-limiting embodiment, namely scraper assembly 8000”. Scraper assembly 8000” differs from scraper assembly 8000 in that the remote material removal device is a water jet knife 800” connected to a pressurized water supply 98” which water jet knife 800” is configured to transmit a water jet 820” to the target area 822”, and that the relative position of the scraper 100 and the water jet knife 800” in the roll crusher is in region 9 to 12 of the roll, when viewing the roll from a side showing clockwise rotation. One advantage of using a water jet knife over an air jet knife may be reduced dust formation.The advantage of this position may be that the material will be removed more easily from the roll crusher, since the direction of impact is generally downwards – in contrast to the substantially horizontal direction of impact of the previously described configurations. Petition 870250095186, dated 10 / 17 / 2025, p. 95 / 150 82 / 101

[00213] Figure 12 illustrates a monitoring system 90 for a roll crusher exemplified here in the context of scraper assembly 8000. In the example, the crushing roll 3 has a flange 36 on which accumulated material 41 has been accumulated as described in detail earlier. The monitoring system 90 may comprise a controller connected to a series of sensor peripherals. In the example embodiment illustrated in Figure 12, the control unit 800 of the roll crusher acts as a control unit also for the monitoring system 90. Specifically, these sensor peripherals may include a first monitoring camera 92 arranged to have the accumulated material 41 in view. By analyzing the signal transmitted from the first monitoring camera 92, a level of material accumulation can be inferred by the control system 80.By allowing the first monitoring camera 92 to view the flange 36, it is also conceivable to infer a degree of flange deformation from an analysis of the signal from the first monitoring camera 92. The monitoring system 90 may further comprise a second monitoring camera 93 arranged to have the scraper 100 and / or the jet plume of the air knife 800 in view. By analyzing the signal transmitted from the second monitoring camera 93, the condition of the scraper 100 and / or the air knife 800 can be inferred by the control system 80. The monitoring system 90 may further comprise a plurality of strain gauges 94 arranged on the flange 36. By analyzing the signal transmitted by the strain gauges 94, the condition of the flange can be inferred. Petition 870250095186, dated 10 / 17 / 2025, page 96 / 150 83 / 101 can be monitored. The strain gauges 94 can be arranged to transmit signals wirelessly. The monitoring system 90 may further comprise a strain gauge 96 mounted on the scraper 100. By analyzing the signal transmitted by the strain gauge 96, the condition of the mechanical scraper 100 can be monitored. Although illustrated here as mounted on the scraper 100, it is also conceivable to provide a strain gauge on the retaining device 110.

[00214] Figures 13A to C illustrate a 9000 scraper assembly according to another embodiment of the example. The 9000 scraper assembly is similar to the 8000 scraper assembly described previously and is based on a combination of an air knife and a mechanical scraper. However, the 9000 scraper assembly includes some additional features which will now be discussed in detail.

[00215] The scraper assembly 9000 comprises a scraper 900 having two wear elements 904a, 904b. The scraper 900 is mounted on the wedge element 920 which is fixed to the support 914 by screwing. The support 914 is fixed to beams 912 which can be mounted on a roller crusher frame. Openings are provided in both the wedge element 920 and the support 914 which, when assembled together, form a direct opening 921 in said elements. The purpose of the direct opening 921 is to allow an air plume 820 from the air knife 800 to pass through the frame. The air jet 800 is arranged with its air nozzle 804 located just behind the direct opening 921. As best illustrated in Figures 13B and C, the air knife 800 includes a tube 806 which connects Petition 870250095186, dated 10 / 17 / 2025, p. 97 / 150 84 / 101 fluidly the air nozzle 804 with an air inlet opening 808 located at the opposite end of the air knife body 802. Immediately downstream of the air inlet opening 808, a valve system 810 is provided. The valve system 801 can be controlled from a distance, for example, by a control system as detailed previously. The air knife 800 is fixed to a support structure 960 of the roll crusher by means of beams 926.

[00216] The scraper assembly further comprises a wear protection arrangement 950 to protect the air knife 800. For the example embodiment, the wear protection arrangement includes two separate features: Firstly, the body 802 of the air knife 800 is protected by a wear guard 952 disposed on top of the main body 802. The wear guard 952 has an inclined top surface to allow falling material to be deflected away from the air knife 800. Secondly, the air nozzle 804 of the air knife 800 is protected by means of the support 914 and the wedge element 920. As said elements are disposed very close to the air nozzle 804, they will act as a shield for the air nozzle 804, thereby protecting it against foreign objects such as falling crushing material or the like.The direct opening 921 allows the air plume 820 to pass through the wear protection structure as best illustrated in figure 13C.

[00217] Figures 14A to 14C illustrate a scraper 200 according to a second embodiment of example of Petition 870250095186, dated 10 / 17 / 2025, page 98 / 150 85 / 101 revelation. The scraper 200 can be used instead of the scraper 100 already described, replacing it in any of the figures 4 to 13. In figure 14B, the scraper 200 is illustrated in its intended position on a flange 36 of a roller 3. The black arrow indicates the tangential speed of the rotating roller 3.

[00218] Scraper 200 comprises a scraping element 210. Scraping element 210 has a scraping surface 204. As can be seen in Figures 14A to C, the scraping surface 204 is for scraper 200 defined in a single element, namely scraping element 210. This differs from scraper 100 of the first example embodiment, where scraping surface 104 is defined by wear members 102a and 102b together. Another difference between scraper 200 and scraper 100 is that scraping surface 204 of scraping element 210 comprises polycrystalline diamond (PCD).

[00219] As readily recognized by those skilled in the art, diamond can be a single continuous crystal or it can be composed of many smaller crystals (polycrystals). Large, clear, transparent single-crystal diamonds are typically used as gemstones. Polycrystalline diamond (PCD) consists of numerous small grains, which are easily seen with the naked eye through intense light absorption and scattering; it is unsuitable for gemstones and is used instead for industrial applications such as cutting and mining tools. Polycrystalline diamond is often described by the average size (or grain size) of the crystals that compose it. Grain sizes range from Petition 870250095186, dated 10 / 17 / 2025, page 99 / 150 86 / 101 nanometers to hundreds of micrometers, commonly referred to as nanocrystalline and microcrystalline diamond, respectively.

[00220] For scraper 200, scraping element 210 further comprises a wear-resistant material in which polycrystalline diamond (PCD) is at least partially incorporated. The polycrystalline diamond (PCD) may, in an alternative embodiment, be fixed to a surface of a wear-resistant material of scraping element 210. For the example embodiment, the wear-resistant material is a cemented carbide comprising tungsten carbide and, as a binder, cobalt. The binder content may typically be 10-15% by weight. Other wear-resistant materials are conceivable.Such alternative materials include other ceramic materials, such as titanium carbides or vanadium carbides; metal-ceramic composite materials, such as cemented carbides, for example, titanium carbide, tungsten carbide or vanadium carbide with cobalt as a binder; or metal matrix composite materials comprising titanium carbide, tungsten carbide or vanadium carbide.

[00221] In one embodiment, polycrystalline diamond (PCD) is embedded in tungsten carbide, vanadium carbide, or titanium carbide.

[00222] One advantage of the scraping surface 204 comprising polycrystalline diamond (PCD) is that the wear life of the scraper 200 can be considerably extended. Typically, such scraping surfaces 204 would comprise Petition 870250095186, dated 10 / 17 / 2025, pp. 100 / 150 87 / 101 wear-resistant material such as ceramic or composite materials comprising tungsten carbide, titanium carbide and vanadium carbide, but with a scraping surface 204 comprising polycrystalline diamond (PCD), the wear life can be extended by up to about 50 times compared with comprising only, for example, a composite material comprising tungsten carbide.

[00223] The scraping element may comprise a layer of polycrystalline diamond (PCD). The polycrystalline diamond (PCD) layer may have a thickness of 0.4 to 3.2 mm, or 1.0 to 2.0 mm, or 1.35 to 1.8 mm, or 1.4 to 1.6 mm, or about 1.5 mm.

[00224] The diamond grain size of the polycrystalline diamond (PCD) from the scraping surface can be 0.8 to 30 μm, as determined by image analysis using a Scanning Electron Microscope (SEM).

[00225] Diamond grain size can be measured by various measurement techniques, such as laser size analyzers or scanning electron microscopes (SEM). An example of a laser size analyzer is a Malvern Particle Size Analyzer instrument that relies on laser diffraction. The values ​​determined using the laser size analyzer can be the initial diamond grain size which, for some applications, can subsequently be subjected to high-temperature / high-pressure sintering. When the diamond particles have been sintered and compacted to form polycrystalline diamond (PCD) Petition 870250095186, dated 10 / 17 / 2025, pp. 101 / 150 88 / 101 scraping surface, an image analysis by means of scanning electron microscopy is used to determine the final microstructural grain size distribution, i.e., the diamond grain size of the polycrystalline diamond (PCD) of the scraping surface.

[00226] The scraper 200 further comprises a main scraper body 203 which is structured and arranged to support the scraper element 204 during use. The main scraper body 203 may be made of a resilient material such as steel. However, other materials are also conceivable such as hardened white iron and / or manganese steel.

[00227] Although not shown in the present invention, it is also conceivable to provide additional surfaces of the scraper element 210 with a polycrystalline diamond (PCD). For example, side surfaces of the scraper element 210 may comprise a polycrystalline diamond (PCD). Referred to in an alternative embodiment, the scraping surface 210 may extend to also encompass side surfaces of the scraper element 210.

[00228] The scraping element 210 and the main scraper body can be brazed together. However, other alternative fixings are also possible, such as welding, gluing, hook and loop fasteners, screws or dowels, or a combination thereof.

[00229] As best illustrated in Figure 14B, just as for scraper 100 illustrated in Figure 3C, the scraping surface 204 is arranged to incline in a relation to a normal N with respect to the inner surface of Petition 870250095186, dated 10 / 17 / 2025, pp. 102 / 150 89 / 101 flange 39 and incline so that a distance L1 between the normal N with respect to the inner surface 39 of flange 36 and the scraping surface 204 decreases towards flange 36. The advantage of having the scraping surface 204 inclined with respect to the normal of the inner surface 39 of flange 36 with a decreasing distance L1 towards flange 36 is that the material removed from the corner position formed by the outer surface 37 of roller 3 and the inner surface 39 of flange 36 will be induced by the inclined scraping surface 204 towards the center of roller 3 instead of being compressed and compacted between the scraping element 210 and the inner surface 39 of flange 36. For the example embodiment, the scraping surface 204 is substantially flat. Therefore, the variable distance L1 as described above can, for the example embodiment, be additionally expressed in terms of a defined angle α between the scraping surface 204 and the normal N.This is illustrated in Figure 14B. The angle α can be 1 to 15°, or 2 to 10°, or 3 to 8°, or 4 to 6°, or 5°.

[00230] The scraper 200 has an extension from the scraping element 210 towards a rear end 209 of the scraper 200. As best illustrated in Figure 14B, the main scraper body 203 has a surface 206 facing the flange 36 and two surfaces 207, 208 that face away from the flange 36. Some of these surfaces 206, 207, 208 form oblique angles with the inner surface 39 of the flange 36 when the scraper 200 is mounted in its intended position on the roll crusher 1. In Petition 870250095186, dated 10 / 17 / 2025, pp. 103 / 150 In particular, the scraper 200 is structured and arranged so that a distance L2 between the surface 206 facing the flange 36 and an inner surface of the flange 39 decreases towards the scraping element 210 over at least part of its length. This shape may allow the material removed from the corner position formed by the outer surface 37 of the roller 3 and the inner surface 39 of the flange 36 to be prone to flow along the surface 206 of the scraper 200 facing the flange 36, and as the distance is increased away from and downstream of the scraping surface 204, the removed material will be allowed to be removed towards the center of the roller instead of being compressed and compacted between the scraper 200 and the inner surface 39 of the flange 36. For the example embodiment, the surface 206 is substantially flat.Therefore, the variable distance L2 as described above can, for the example embodiment, be further expressed in terms of an angle β defined between the surface 206 facing the flange 36 and the inner surface 39 of the flange 36. This is also illustrated in Figure 14B. The angle β can be 5 to 25°, or 5 to 20°, or 5 to 15°, or 8 to 12°, or 10°.

[00231] Furthermore, the scraper 200 is additionally structured and arranged so that a distance L3 between surfaces 207, 208 facing away from flange 36 and an inner surface 39 of flange 36 decreases towards the scraping element 210 over at least part of its length. For scraper 200, surface 207 will have this variable distance starting at the minimum distance S3 relative to Petition 870250095186, dated 10 / 17 / 2025, pp. 104 / 150 91 / 101 to the inner surface 39 of flange 36 and extending away from the inner surface 39 of flange 36, while surface 208 is substantially parallel to the inner surface 39 of the flange. Surfaces 207, 208 facing away from flange 36 are opposite to surface 206 facing flange 36. Again, scraper 200 provides a surface 207 that will induce the removed material to be moved towards the center of roller 3, which is beneficial. For the example embodiment, surface 207, 208 facing away from flange 36 includes surface 207 and surface 208 which are both substantially flat. As clearly illustrated in Figure 14B, surface 207 is substantially parallel to the inner surface 39 of flange 36.Therefore, the variable distance L3 as described above can, for the example embodiment, be further expressed in terms of an angle γ defined between the surface 207 that faces away from flange 36 and the inner surface 39 of flange 36. This is also illustrated in Figure 14B. The angle γ can be 5 to 25°, or 5 to 20°, or 5 to 15°, or 8 to 12°, or 10°. The angle β and the angle γ can, for some embodiments, be equal to each other.

[00232] The person skilled in the art realizes that it is not only the shape of the scraper, that is, the main scraper body 203 and the scraper element 210, that must comply with these geometric constraints, but also the orientation in which the scraper 200 is mounted on the roll crusher 1. In other words, the scraper 200 is both structured and arranged in Petition 870250095186, dated 10 / 17 / 2025, pp. 105 / 150 92 / 101 in relation to roller crusher 1 to obtain the described technical effect.

[00233] The scraper 200 is, as illustrated in figure 6, fixed to a previously described wedge element, 520. Direct holes 527 are used to fix the wedge element 520 to a fixing surface, such as the fixing surface 516 illustrated in figure 6, by fasteners. The direct hole 528 is used to connect the chain 526 to adjacent structures, such as the square beam 512 as illustrated in figure 6.

[00234] Figure 16 illustrates scraper 200 and scraper 200' when installed in a roll crusher. Scraper 200' differs from scraper 200 only in that it is mirrored since it is arranged on a flange 36 being opposite to the flange 36 where scraper 200 is arranged. Specifically, Figure 16 illustrates the assembly of scraper 7000' according to yet another embodiment of the example. The scraper assembly 7000' is similar to the previously described scraper assembly 7000, but differs in that the scrapers 100 are replaced by scrapers 200, 200' and that there is only one scraper 200, 200' on each flange 36. In other words, the scraper assembly 7000' comprises two scrapers 200, 200', each arranged along a respective end of a roller 3 having double flanges 36. Each scraper 200, 200' can be mounted according to any of the previously described combinations or any undescribed combination included within the scope of protection of the claims.The 200 scrapers, 200' are mounted individually in one. Petition 870250095186, dated 10 / 17 / 2025, pp. 106 / 150 93 / 101 support structure 710', which, in turn, is mounted on the roller crusher structure. As readily recognized by those skilled in the art, the scraper assembly 7000' is structured and arranged to be situated approximately 6 to 9 o'clock from roller 4, when viewing roller 4 from one side showing clockwise rotation.

[00235] Figures 15A to 15C illustrate a scraper 300 according to a third embodiment of the embodiment of the invention. The scraper 300 can be used instead of the already described scraper 100 or scraper 200, replacing it in any of Figures 4 to 14. The scraper 300 differs from the scraper 200 only in that the scraping element 310 comprises a front portion 310a and a rear portion 310b which are fixed to each other. The front portion 310a has a scraping surface 304. Although the front portion 310a of the scraper 300 and the scraping element 210 of the scraper 200 may be incorporated differently from each other, such as by choice of wear-resistant material, thickness or similar, it is also conceivable that the front portion 310a of the scraper 300 and the scraping element 210 of the scraper 200 are identical to each other. The rear portion 310b has a surface 304 that faces the flange 36 and a surface 301 that faces away from the flange 36.Surface 305 and surface 301 are substantially parallel to each other. Furthermore, surface 305 and surface 301 may be substantially parallel to the inner surface 39 of flange 36. It is conceivable that surface 305 and surface 301 comprise a polycrystalline diamond (PCD). It is also conceivable. Petition 870250095186, dated 10 / 17 / 2025, pp. 107 / 150 94 / 101 conceivably other, or all, lateral surfaces of the rear portion 310b comprise a polycrystalline diamond (PCD). The scraper 300 further comprises a scraper main body 303 which is structured and arranged to support the scraper element 310 during use. The scraper main body 303 may be made from the same type of materials as previously listed for the scraper main body 203. A difference between the scraper main body 303 and the scraper main body 203 is that the scraper body 303 has a shorter extension from the scraping element 310 to the rear end 309 to accommodate the larger size of the scraper element 310. The scraper element 303 has surfaces 307, 308 which are oriented away from the flange 36 and surface 306 which is oriented towards the flange 36.The shape and arrangement of scraper 300, and in particular the main scraper body 303 in relation to roller 3, can be the same as for scraper 200 and its main scraper body 203, already described in detail above. Specifically, the distances L1, L2, and L3 that can be defined for the scraping surface 304 and surfaces 307, 308, and 306 can vary in the same general way as for scraper 200. The angle ranges for angles α, β, and γ can also follow the ranges given above for scraper 200.

[00236] The front portion 310a and the rear portion 310b can be brazed together, but they can also be manufactured in one piece with the polycrystalline diamond arranged on the scraping surface 304 of the scraping element. Petition 870250095186, dated 10 / 17 / 2025, pp. 108 / 150 95 / 101 310. The rear portion 310b and the main scraper body 303 can also be fastened together by brazing. However, other alternative fastenings are also possible, such as welding, gluing, hook and loop fasteners, screws or dowels, or a combination thereof.

[00237] A person skilled in the art will realize that the present disclosure is by no means limited to the preferred embodiments described above. On the contrary, many modifications and variations are possible and are understood within the scope of the appended claims. Additionally, variations in the disclosed embodiments can be understood and effected by a person skilled in the art in practice, based on a study of the drawings, disclosure, and appended claims. LIST OF MODALITIES

[00238] Modality 1. A roller crusher having two generally parallel rollers arranged to rotate in opposite directions, towards each other, and separated by an opening, each roller having two ends, the roller crusher comprising: A flange attached at least to one end of one of the rollers, The flange extending in a radial direction from the roller, The flange having a height (H) above an outer surface of the roller, In which the roller crusher further comprises at least one scraper disposed at one end of the roller with a flange for at least partially removing material. Petition 870250095186, dated 10 / 17 / 2025, pp. 109 / 150 96 / 101 accumulated on the flange and / or on the outer surface at the end of the roller; and Wherein each of at least one scraper comprises a scraping element having a scraping surface which scraping surface comprises a polycrystalline diamond (PCD).

[00239] Embodiment 2. Roll crusher, as claimed in Embodiment 1, wherein the scraping element further comprises a wear-resistant material in which polycrystalline diamond (PCD) is at least partially incorporated.

[00240] Embodiment 3. Roll crusher, as claimed in Embodiment 2, wherein the wear-resistant material is one from the list of: a ceramic material, a ceramic-metal composite material and a metal matrix composite material.

[00241] Embodiment 4. Roll crusher, as claimed in any of Embodiments 1 to 3, wherein the scraping surface of at least one scraper is arranged to incline in relation to a normal to the inner surface of the flange and incline so that a distance between the normal to the inner surface of the flange and the scraping surface decreases towards the flange.

[00242] Embodiment 5. Roller crusher, as claimed in any of Embodiments 1 to 4, wherein at least one scraper has a flange-facing surface which surface extends from the scraping element toward a rear end of at least Petition 870250095186, dated 10 / 17 / 2025, pp. 110 / 150 97 / 101 a scraper, wherein at least one scraper is structured and arranged so that a distance between the surface facing the flange and an inner surface of the flange decreases towards the scraping element over at least part of its length.

[00243] Embodiment 6. Roller crusher, as claimed in any of Embodiments 1 to 5, wherein at least one scraper has a surface facing away from the flange, which surface has an extension from the scraping element towards a rear end of at least one scraper, wherein at least one scraper is structured and arranged so that a distance between the surface facing away from the flange and an inner surface of the flange decreases towards the scraping element over at least part of the extension.

[00244] Embodiment 7. Roller crusher, as claimed in any of Embodiments 1 to 6, wherein the scraping element comprises a front portion and a rear portion that are fixed to each other, and wherein the front portion has the scraping surface.

[00245] Embodiment 8. Roll crusher, as claimed in Embodiment 7, wherein the rear portion has a surface facing the flange and a surface facing away from the flange, said surfaces being substantially parallel to an inner surface of the flange.

[00246] Embodiment 9. Roller crusher, as claimed in any of Embodiments 1 to 8, wherein the Petition 870250095186, dated 10 / 17 / 2025, p. 111 / 150 98 / 101 at least one scraper is arranged in a lower part of the roller crusher.

[00247] Embodiment 10. Roller crusher, as claimed in any of Embodiments 1 to 9, wherein at least one scraper is arranged so that the scraping surface of at least one scraper is at least partially facing downwards to allow removed material to exit from the roller and scraping surface by gravitational force.

[00248] Embodiment 11. Roll crusher, as claimed in any of Embodiments 1 to 10, wherein at least one scraper has a fixing position located at a distance from the outer surface of the roll, wherein the at least one scraper is arranged so that a position of the scraping surface of at least one scraper is situated on, or consecutive to, a radial geometric axis extending from a rotational geometric axis of the roll and through the fixing position.

[00249] Embodiment 12. Roller crusher, as claimed in any of Embodiments 1 to 11, wherein the roller crusher further comprises at least one retaining device for at least one scraper, wherein the at least one retaining device connects to a roller crusher frame in a position for attaching at least one scraper.

[00250] Embodiment 13. Roll crusher, as claimed in Embodiment 12, wherein at least one retaining device comprises at least one support and by Petition 870250095186, dated 10 / 17 / 2025, p. 112 / 150 99 / 101 less a wedge element, wherein the wedge element is structured and arranged to fix at least one scraper in at least one support such that an angular position of at least one scraper is displaced relative to an angular position of at least one support in a rotational plane of the roller.

[00251] Embodiment 14. Roller crusher, as claimed in any of Embodiments 1 to 13, wherein the roller crusher further comprises a flexible retaining arrangement arranged to engage at least one scraper with a roller crusher frame.

[00252] Embodiment 15. Roll crusher, as claimed in any of Embodiments 1 to 14, wherein at least one scraper is at least two scrapers arranged consecutively relative to each other at one end of the roll with a flange for at least partially removing material accumulated on the flange and / or on the outer surface at the end of the roll.

[00253] Embodiment 16. Roller crusher, as claimed in Embodiment 15, wherein at least two consecutive scrapers are arranged at equal distances from the flange and / or the outer surface at the end of the roller.

[00254] Embodiment 17. Roll crusher, as claimed in Embodiment 15, wherein the at least two consecutive scrapers are arranged at different distances from the flange and / or from the outer surface at the end of the roll.

[00255] Possibility 18. Roller crusher, as claimed in Possibility 17, wherein at least two Petition 870250095186, dated 10 / 17 / 2025, pp. 113 / 150 100 / 101 consecutive scrapers are arranged in decreasing distance from the flange and / or the outer surface of the roller, viewed from a front scraper to consecutive scraper(s).

[00256] Embodiment 19. Roll crusher, as claimed in Embodiment 17, wherein the at least two consecutive scrapers comprise at least two subsets of at least consecutive scrapers, wherein the at least two consecutive scrapers in each subset are arranged at the same distance from the flange and / or roll surface and wherein the at least two subsets of consecutive scrapers are arranged at different distances from the flange and / or the outer surface at the end of the roll.

[00257] Embodiment 20. Roll crusher, as claimed in Embodiment 19, wherein the at least two consecutive scraper subsets are arranged at a decreasing distance from the flange and / or the outer surface at the end of the roll as seen from a front subset to the consecutive subset(s).

[00258] Embodiment 21. Roller crusher, as claimed in any of Embodiments 1 to 20, wherein the roller crusher comprises two flanges fixed at opposite ends of one of the rollers and wherein the at least one scraper comprises a first subassembly of at least one scraper and a second subassembly of at least one scraper, the first and second subassemblies of which are each arranged in Petition 870250095186, dated 10 / 17 / 2025, pp. 114 / 150 101 / 101 a respective end region of the roller with the two flanges.

[00259] Embodiment 22. Roll crusher, as claimed in any of Embodiments 1 to 21, wherein the roll crusher further comprises a remote material removal device configured to emit a material removal beam towards a target area, wherein the remote material removal device and at least one scraper are arranged consecutively to each other at one end of the roll with a flange for at least partially removing the material accumulated on the flange and / or on the outer surface at the end of the roll.

[00260] Embodiment 23. Roller shredder, as claimed in Embodiment 22, wherein the target area of ​​the remote material removal device is situated in front of at least one scraper. Petition 870250095186, dated 10 / 17 / 2025, pp. 115 / 150

Claims

1 / 6 CLAIMS 1. A roller crusher having two generally parallel rollers arranged to rotate in opposite directions, one towards the other and separated by an opening, each roller having two ends, the roller crusher being characterized in that it comprises: A flange fixed at least at one end of one of the rollers, The flange extending in a radial direction from the roller, The flange having a height (H) above an outer surface of the roller, Wherein the roller crusher further comprises at least one scraper disposed at one end of the roller with a flange for at least partially removing material accumulated on the flange and / or on the outer surface at the end of the roller; and Wherein each of at least one scraper comprises a scraping element having a scraping surface which scraping surface comprises a polycrystalline diamond (PCD).

2. Roller crusher, according to claim 1, characterized in that the scraping element further comprises a wear-resistant material in which polycrystalline diamond (PCD) is at least partially incorporated.

3. Roller crusher, according to claim 2, characterized in that the wear-resistant material is one from the list of: a ceramic material, a ceramic-metal composite material and a metal matrix composite material.

4. Roller crusher, according to any one of claims 1 to 3, characterized in that the scraping surface of at least one scraper is arranged to incline in relation to a normal to the inner surface of the flange and incline so that a distance between the normal to the inner surface of the flange and the scraping surface decreases towards the flange.

5. Roller crusher, according to any one of claims 1 to 4, characterized in that at least one scraper has a flange-facing surface, which surface extends from the scraping element towards a rear end of at least one scraper, wherein the at least one scraper is structured and arranged so that a distance between the flange-facing surface and an inner surface of the flange decreases towards the scraping element over at least part of the extension.

6. Roller crusher, according to any one of claims 1 to 5, characterized in that at least one scraper has a surface facing away from the flange, which surface extends from the scraping element towards a rear end of at least one scraper, wherein the at least one scraper is structured and arranged so that a distance between the surface facing away from the flange and an inner surface of the flange decreases towards the scraping element over at least part of the extension. Petition 870250095186, dated 10 / 17 / 2025, p. 117 / 150 3 / 6 7. Roller crusher, according to any one of claims 1 to 6, characterized in that the scraping element comprises a front portion and a rear portion that are fixed to each other, and in that the front portion has the scraping surface.

8. Roller crusher, according to claim 7, characterized in that the rear portion has a surface facing the flange and a surface facing away from the flange, said surfaces being substantially parallel to an inner surface of the flange.

9. Roller crusher, according to any one of claims 1 to 8, characterized in that at least one scraper is arranged in a lower part of the roller crusher.

10. Roller crusher, according to any one of claims 1 to 9, characterized in that at least one scraper is arranged so that the scraping surface of at least one scraper is at least partially facing downwards to allow removed material to exit from the roller and scraping surface by gravitational force.

11. Roller crusher, according to any one of claims 1 to 10, characterized in that at least one scraper has a fixing position located at a distance from the outer surface of the roller, wherein the at least one scraper is arranged so that a position of the scraping surface of at least one scraper is situated on, or consecutive to, a radial geometric axis extending from a rotational geometric axis of the roller and through the fixing position.

12. Roller crusher, according to any one of claims 1 to 11, characterized in that the roller crusher further comprises at least one retaining device for at least one scraper, wherein the at least one retaining device connects to a structure of the roller crusher in a position for fixing at least one scraper.

13. Roller crusher, according to claim 12, characterized in that at least one retaining device comprises at least one support and at least one wedge element, wherein the wedge element is structured and arranged to fix at least one scraper in at least one support such that an angular position of at least one scraper is displaced relative to an angular position of at least one support in a rotational plane of the roller.

14. Roller crusher, according to any one of claims 1 to 13, characterized in that the roller crusher further comprises a flexible retention arrangement arranged to couple at least one scraper with a roller crusher frame.

15. Roller crusher, according to any one of claims 1 to 14, characterized in that at least one scraper is at least two scrapers arranged consecutively relative to each other at one end of the roller with a flange for at least partially removing accumulated material on the flange and / or the outer surface at the end of the roller. Petition 870250095186, dated 10 / 17 / 2025, p. 119 / 150 5 / 6 16. Roller crusher, according to claim 15, characterized in that at least two consecutive scrapers are arranged at equal distances from the flange and / or the outer surface at the end of the roller.

17. Roller crusher, according to claim 15, characterized in that the at least two consecutive scrapers are arranged at different distances from the flange and / or from the outer surface at the end of the roller.

18. Roller crusher, according to claim 17, characterized in that the at least two consecutive scrapers are arranged at decreasing distances from the flange and / or from the outer surface of the roller as seen from a front scraper to consecutive scraper(s).

19. Roller crusher, according to claim 17, characterized in that the at least two consecutive scrapers comprise at least two subsets of at least consecutive scrapers, wherein the at least two consecutive scrapers in each subset are arranged at the same distance from the flange and / or roller surface and wherein the at least two subsets of consecutive scrapers are arranged at different distances from the flange and / or outer surface at the end of the roller.

20. Roller crusher, according to claim 19, characterized in that the at least two consecutive scraper subsets are arranged at a decreasing distance from the flange and / or the outer surface at the end of the roller seen from a front subset to the consecutive subset(s).

21. Roller crusher, according to any one of claims 1 to 20, characterized in that the roller crusher comprises two flanges fixed at opposite ends of one of the rollers and in that the at least one scraper comprises a first subassembly of at least one scraper and a second subassembly of at least one scraper, the first and second subassemblies of which are each disposed in a respective end region of the roller with the two flanges.

22. Roller crusher, according to any one of claims 1 to 21, characterized in that the roller crusher further comprises a remote material removal device configured to emit a material removal beam towards a target area, wherein the remote material removal device and at least one scraper are arranged consecutively to each other at one end of the roller with a flange for at least partially removing the material accumulated on the flange and / or on the outer surface at the end of the roller.

23. Roller crusher, according to claim 22, characterized in that the target area of ​​the remote material removal device is situated in front of at least one scraper. Petition 870250095186, dated 10 / 17 / 2025, pp. 121 / 150

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