AU2018400359B2

AU2018400359B2 - Mobile crushing system having an eccentric roller crusher and finger screen

Info

Publication number: AU2018400359B2
Application number: AU2018400359A
Authority: AU
Inventors: Detlef Papajewski; Piotr SZCZELINA
Original assignee: FLSmidth AS
Current assignee: FLSmidth AS
Priority date: 2018-01-04
Filing date: 2018-12-21
Publication date: 2022-01-06
Anticipated expiration: 2038-12-21
Also published as: AU2018400359A1; CN111565852A; EP3735320A1; BR112020013576A2; WO2019134864A1; CL2020001772A1; PE20211180A1

Abstract

The invention relates to a mobile crushing system (1) for crushing and conveying conveyed material in a conveying direction (F), comprising a support structure (2) on at least one running gear (3). The support structure (2) has: a feed device (4), having a receiving bin (41) and a feed conveyor apparatus (42); a screen system (6) for receiving the conveyed material from the feed conveyor apparatus (42) and screening said conveyed material in such a way that conveyed material having piece sizes below a defined size directly passes through and conveyed material having piece sizes greater than or equal to the defined size is further conveyed substantially in the conveying direction (F); a crusher (7) having a crushing space (71) for receiving and crushing the conveyed material having piece sizes greater than or equal to the defined size from the screen system (6); and at least one collecting conveyor belt (8) arranged below the screen system (6) and below the crusher (7) for receiving and conveying conveyed material that has directly passed through the screen system (6) and conveyed material crushed by the crusher (7). The crusher (7) is an eccentric roller crusher having an eccentric roller (72). The screen system (6) is a finger screen having a plurality of finger elements (61). The finger elements (61) each have a main extension axis (H).

Description

Mobile crushing system having an eccentric roll crusher and finger screen

Technical Field The invention relates to a mobile crushing system for crushing and conveying material to be conveyed in a conveying direction, having a support structure on at least one undercarriage, wherein the support structure 'has a feed device having a receiving hopper and a feed con veyor apparatus, a screen system for receiving the material to be conveyed from the feed conveyor apparatus and screening said material to be conveyed in such a way that material to be conveyed having piece sizes below a defined size passes through directly and material to be conveyed having piece sizes greater than or equal to the defined size is moved onward substantially in the conveying direction, a crusher having a crushing chamber for receiving the material to be conveyed having piece sizes greater than or equal to the defined size from the screen system and crushing said material, and at least one collecting conveyor belt ar ranged below the screen system and below the crusher for receiving and conveying material to be conveyed that has passed directly through the screen system and material to be con veyed crushed by the crusher. In particular, the mobile crushing system is suitable for mate rial to be conveyed in the form of hard rock, i.e. for material to be conveyed having a com pressive strength of at least 70 MPa, for example.

Background Art Mobile crushing systems of the type stated at the outset are widely known. Here, the screen system is a widely known screen system driven by a vibration motor, for example. The mate rial to be conveyed excited by the vibration motor moves along a gradient of a screen grid into the crusher, which is designed as a jaw crusher by way of example. The material to be conveyed is broken down to the intended size by cyclical impact movements of the movable crushing jaw against the rigid crushing jaw. Owing to the way the jaw crusher functions, the cyclical impact movements cause an unbalance that exerts a component-damaging load on the undercarriage and the steel structure. These loads act during idling and, especially, dur ing the process of crushing hard rock. Because of the abovementioned loads and, in addi tion, the severe vibrations of the screen system, the mobile crushing system should rest stat ically on the underlying surface during the crushing process. This means that the undercar riage of the mobile crushing system should not be moved during the crushing process in or der to increase the life of the mobile crushing system and ensure stability. Otherwise, the loads have the effect of damaging the components of the mobile crushing system. In particu lar, the prior art envisages that the screen system must be positioned higher than the jaw crusher. This is necessary because the material to be conveyed must be screened by means

18268210_1 (GHMatters) P113741.AU of the vibrations along the screen grid. The impact movements of the jaw crusher are not suf ficient to convey the material to be conveyed at an economically adequate speed into the crushing chamber of the jaw crusher. The subsequently screened material to be conveyed can then fall into the crushing chamber of the jaw crusher. However, a large overall height also entails an increase in the use of materials and ultimately also in the costs of the mobile jaw crusher. From EP 0 382 922 A2 and WO 2005/063398 Al, mobile crushing systems are known which are arranged on an undercarriage and in which the feed material is conveyed via a conveyor to a grate or bar screen in order to separate the fines content. Larger lumps slide into a jaw crusher to be crushed there. In the crushing system described in EP 0 382 922 A2, the conveyor is an vibration conveyor to which the material to be conveyed is fed via a feed hopper. The crushing system described in WO 2005/063398 Al is a double crushing system for road construction, in which the conveyor is a belt conveyor to which the material to be conveyed is fed via a surge hopper. In addition, a further conveyor is arranged downstream of the jaw crusher, which feeds the crushed material to be conveyed, together with the previously separated fines, via a bar screen to a roller crusher, in which the coarse grain retained by the bar screen is crushed. In order to promote the classification, the bar screen can be vibrated by using a vibrating device.

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

Summary Disclosed herein is a mobile crushing system of the type stated at the outset which has a construction that is as economical and compact as possible and furthermore may reduce loads on the support structure during idling and during the process of crushing material to be conveyed in the form of hard rock.

In accordance with one aspect of the present invention, by virtue of the fact that the crusher is an eccentric roll crusher having an eccentric roll and that the screen system is a finger screen having a plurality of finger elements, wherein the finger elements each have a main extension axis, even the need for a separate vibration unit may be eliminated because con tinuous excitation of the finger screen is made possible by the eccentric motion of the eccen tric roll of the eccentric roll crusher; for example, an eccentric roll crusher with finger screen is known from WO 2014/067867 Al. In particular, the finger screen is a screen system inte grated into the eccentric roll crusher. This results, in particular, in a compact, i.e.low, overall height. Moreover, it is thereby possible to make the feed device shorter than in the prior art, thus making it possible to save further costs. It is advantageous that the eccentric roll crusher of the mobile crushing system can remain active while idling during a traveling motion by the 18268210_1 (GHMatters) P113741.AU undercarriage. It is particularly advantageous that the eccentric roll crusher of the mobile crushing system can perform the crushing process during a traveling motion by the undercar riage. In other words, this means that the mobile crushing system can change its position while the eccentric roll crusher is idling or even while the eccentric roll crusher is crushing material to be conveyed. This is favored especially by the low overall height and hence by the low center of gravity of the mobile crushing system.

For the purposes of this invention, the fact that the material to be conveyed having piece siz es below a defined size passes through directly means that the material to be conveyed falls vertically through screen openings due to gravity.

In particular, the material to be conveyed is hard rock. For the purposes of the invention, hard rock has a compressive strength of at least 70, in particular at least 80, MPa.

For the purposes of the invention, the conveying direction is parallel to the underlying sur face. According to the teaching of the invention, the fact that the material to be conveyed having piece sizes greater than or equal to the defined size is moved onward substantially in the conveying direction means that, in addition to the horizontal component of extent, a verti cal component of extent can be incorporated to ensure that the material to be conveyed does not come to a halt and consequently is easier to convey.

In order, in particular, to protect the components of the mobile crushing system, provision can be made for the eccentric roll crusher to be balanced in terms of machine dynamics. This balancing allows less massive dimensioning of the support structure, whereby, in addition to the more favorable possibilities for the production of the components, the energy consump tion for moving the mobile crushing system is also reduced. Moreover, it is possible, in par ticular, for the crushing process to be performed in a manner which reduces stress on com ponents during activity of the undercarriage, i.e. during the movement of the mobile crushing system on the underlying surface. The balancing in terms of machine dynamics can be per formed by common means in the prior art.

However, it is particularly appropriate for balancing that the eccentric roll crusher has at least one inertia mass for balancing in terms of machine dynamics. The inertia mass can be fixed in a nonadjustable manner for reasons of cost effectiveness. As a particularly preferred op tion, however, the inertia mass on the eccentric roll crusher can be releasable and adjustable in order to keep balancing as constant as possible in accordance with wear-related removal of material. As a particularly preferred option, adaptation of the at least one inertia mass can be performed manually or in an automated manner.

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According to a particularly preferred embodiment of the invention, it is envisaged that the fin ger elements of the finger screen transfer the material to be conveyed directly from the feed conveyor apparatus into the crushing chamber of the crusher. This means that there are no further stages arranged inside or outside the screen system in addition to a screen grade, and therefore slight excitation is sufficient to transfer the material to be conveyed into the crushing chamber, for example. In general, mechanical plates or similar mounted in a fixed manner are regarded as stages. By way of example, a stage between the screen system and the jaw crusher is illustrated as an angled plate in figures 1 and 2. Another advantage is that the overall height of the mobile crushing system is reduced.

Alternatively, provision can be made for the finger elements of the finger screen to transfer the material to be conveyed from the feed conveying apparatus into the crushing chamber of the crusher via a sloping slide plate. Although the entire structure may end up being some what taller than a stepless embodiment, the use of the slide plate has an advantageous ef fect on the conveying properties. In particular, the slide plate can have a plurality of holes to allow material that is not to be crushed to pass through.

As a particularly preferred option, the feed conveying apparatus is designed as a feed con veyor belt.

As a particularly preferred option, provision can be made according to one embodiment for the finger screen to be connected to the crusher or to an inlet hood. A design of this kind re duces the quantity of mass-forming components, thus enabling dimensioning to be carried out with lighter and therefore economically more advantageous components.

In particular, the finger screen can be connected detachably to the crusher or to the inlet hood. Allowing for a detachable embodiment furthermore makes it possible to implement an economical and compact construction.

Moreover, the intended economical and compact construction can be achieved, in particular, if the finger elements of the finger screen project at an end into the crushing chamber of the crusher, wherein the finger elements at least partially overlap the eccentric roll, with the re sult that the material to be conveyed having piece sizes below a defined size passes directly downward between the finger elements ahead of the eccentric roll in the conveying direction, and material to be conveyed having piece sizes greater than or equal to the defined size is moved onward into the crushing chamber in the conveying direction on the finger elements, along the main extension axis thereof. It is, in particular, the screen separation directly above the crushing member that allows the very compact construction.

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It is furthermore advantageously possible to provide for the support structure to be capable of being decoupled from the undercarriage. During the crushing process, the support structure can be decoupled from the undercarriage so as to reduce stresses on components. Never theless, the mobile crushing system is mobile in the coupled state. Decoupling is suitable, in particular, if the frequency with which the mobile crushing system is moved is low. Depend ing on the conditions of use, the frequency of movement can vary between a few hours and a few years. With this feature, the mobile crushing system may also be referred to as a semi mobile crushing system.

To optimize the screening of the material to be conveyed in the case of short finger ele ments, there is a particular preference for the main extension axes of the finger elements of the finger screen to be parallel to one another.

The finger elements can preferably be excited by the eccentric movement of the eccentric roll crusher.

Alternatively or in addition, the finger screen can have an excitation unit for exciting the finger elements, wherein the excitation unit is arranged at the rear end of the finger elements in the conveying direction.

The excitation unit can drive a camshaft, for example, wherein each finger element is driven cyclically by a cam, thus ensuring continuous cyclical excitation of the finger elements.

The invention furthermore relates to a method for crushing and conveying material to be conveyed in a conveying direction using a mobile crushing system, wherein the method is characterized by the following method steps, namely charging a feed device with material to be conveyed, having a receiving hopper and a feed conveyor apparatus, subsequently con veying the material to be conveyed using the feed conveyor apparatus from the receiving hopper to the point of discharge onto a screen system, subsequent reception of the material to be conveyed by the screen system in order to screen said material to be conveyed in such a way that material to be conveyed having piece sizes below a defined size passes through directly and material to be conveyed having piece sizes greater than or equal to the defined size is moved onward to a crusher, and subsequent crushing of the material to be conveyed that was moved onward to the crusher, wherein the material to be conveyed that has passed through directly in the screen system and the material to be conveyed crushed in the crusher is received by at least one collecting conveyor belt, which is arranged below the screen sys tem and below the crusher, and is conveyed in the conveying direction, final discharge of the material to be conveyed from the at least one collecting conveyor belt onto a discharge boom having a main conveyor belt, wherein the crusher is an eccentric roll crusher having an ec 18268210_1 (GHMatters) P113741.AU centric roll and the screen system is a finger screen having a plurality of finger elements, wherein the finger elements each have a main extension axis.

The invention preferably relates to a method for crushing and conveying material to be con veyed using the abovementioned mobile crushing system, characterized by at least one of the abovementioned features of the mobile crushing system.

A preferred feature of the invention envisages that the finger screen is excited in such a way that, depending on the piece size, the material to be conveyed passes through the finger el ements of the finger screen or is transferred to the crusher along the main extension axis of said elements.

One advantageous feature furthermore consists in that the excitation of the finger elements results from contacts with the eccentrically moving eccentric roll which crushes the material to be conveyed.

In particular, it is envisaged for the method that the excitation of the finger elements is ac complished by an excitation unit.

Finally, the invention also relates to a finger screen for screening material to be conveyed on a mobile crushing system having at least one of the preceding features, wherein the finger screen has a plurality of finger elements and the finger elements each have a main extension axis, characterized in that the finger screen has an excitation unit for exciting the finger ele ments, wherein the excitation unit is arranged at the rear end of the finger elements in the conveying direction.

Brief Description of Drawings One specific configuration of the invention is explained in greater detail by means of the fol lowing description of an exemplary embodiment and of the drawings.

In the drawings:

Figure 1 shows a schematic side view of a mobile crushing system according to the prior art,

Figure 2 shows a detail A-A from figure 1,

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Figure 3 shows a schematic side view of a mobile crushing system according to a first exemplary embodiment according to the teaching of the invention,

Figure 4 shows a detail B-B from figure 3,

Figure 5 shows a perspective view of a finger screen, designed as a finger screen, of the mobile crushing system according to figure 3, and

Figure 6 shows a schematic view of the finger screen on an eccentric roll of the mobile crushing system according to figure 3.

Detailed Description Figure 1 schematically illustrates a mobile crushing system (1) for crushing and conveying material to be conveyed in a conveying direction (F) according to the prior art. The conveying direction (F) extends parallel to the underlying surface and, in the illustration, runs from left to right in the direction of the transfer of the material to be conveyed. The mobile crushing sys tem (1) comprises a support structure (2) on an undercarriage (3) designed as a crawler un dercarriage. In this case, the undercarriage (3) can comprise a plurality of individual crawler undercarriages or one or more dual crawler undercarriages. The support structure (2) fur thermore has a feed device (4) having a receiving hopper (41) and a feed conveyor appa ratus (42), designed, in particular, as a feed conveyor belt.

The support structure (2) furthermore comprises a screen system (6) for receiving the mate rial to be conveyed from the feed conveyor apparatus (42) and screening said material to be conveyed in such a way that material to be conveyed having piece sizes below a defined size passes through directly and material to be conveyed having piece sizes greater than or equal to the defined size is moved onward substantially in the conveying direction (F). From the screen system (6) the material to be conveyed passes into a crushing chamber (71) of a crusher (7) for receiving the material to be conveyed having piece sizes greater than or equal to the defined size from the screen system (6) and crushing said material. The crusher (7) is designed as a jaw crusher in accordance with the prior art.

Arranged below the screen system (6) and below the crusher (7) there is, by way of example, a collecting conveyor belt (8) for receiving and conveying material to be conveyed that has passed directly through the screen system (6) and material to be conveyed that was crushed by the crusher (7). The screen system (6) has a screen grid which, in the present case, is illustrated in dashed lines and is readily visible especially in figure 2.

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Figure 2 shows a detail view of section A-A according to figure 1. As is clearly apparent, the screen system (6) forms a distinct component in relation to the jaw crusher.

Figure 3 schematically illustrates a preferred embodiment of a mobile crushing system (1) for crushing and conveying material to be conveyed in a conveying direction (F) according to the teaching of the invention. The conveying direction (F) extends parallel to the underlying sur face and, in the illustration, runs from left to right in the direction of the transfer of the material to be conveyed. The mobile crushing system (1) comprises a support structure (2) on an un dercarriage (3) designed as a crawler undercarriage. In this case, the undercarriage (3) can comprise a plurality of individual crawler undercarriages or one or more dual crawler under carriages. The support structure (2) furthermore has a feed device (4) having a receiving hopper(41)and a feed conveyor apparatus (42).

The mobile crushing system (1) according to figure 3 differs significantly from the mobile crushing system (1) according to figure 1 in that the mobile crushing system (1) according to the invention has a screen system (6) which is designed as a finger screen for receiving and screening the material to be conveyed from the feed conveyor apparatus (42). The finger screen comprises a plurality of finger elements (61), wherein the finger elements (61) each have a main extension axis (H), wherein the main extension axis (H) is designated in figures 5 and 6. The main extension axis (H) consists of a vertical axis and a horizontal axis, wherein the horizontal axis is parallel to the conveying direction (F). Screening is performed in such a way that material to be conveyed having piece sizes below a defined size passes through directly and material to be conveyed having piece sizes greater than or equal to the defined size is moved onward substantially in the conveying direction (F).

Substantially in the conveying direction (F) means that the material to be conveyed is con veyed along the main extension axis (H) of the finger elements (61), wherein the main exten sion axis (H) essentially has a horizontal component and in addition a vertical component, like a sum vector. In other words, it is possible, in general, for the conveying direction (F) to be at least partially sloping over the extent of the mobile crushing system (1), wherein the slopes may differ at different locations.

Furthermore, the mobile crushing system according to figure 3 differs significantly from the mobile crushing system according to figure 1 in that the mobile crushing system (1) accord ing to the invention has a crusher (7) designed as an eccentric roll crusher. The crusher (7) has a crushing chamber (71) for receiving the material to be conveyed having piece sizes greater than or equal to the defined size from the screen system (6) and crushing said mate rial.

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A comparison of figure 1 and figure 3 shows that the preferred embodiment of the mobile crushing system (1) and, in particular, the components thereof of substantially decisive signif icance, has/have a smaller overall height in figure 3 than the mobile crushing system (1) ac cording to the prior art in figure 1.

The vibrations of the eccentric roll crusher are preferably compensated in terms of machine dynamics by at least one inertia mass (not illustrated in the present case).

The at least one inertia mass can be fixed in a nonadjustable manner or can be releasable to allow setting. The advantage in the configuration with the ability for release to allow setting is that it is possible to compensate for component wear, thus enabling the mobile crushing sys tem (1) to be balanced at all times.

Moreover, the mobile crushing system (1) has at least one collecting conveyor belt (8) ar ranged below the screen system (6) and below the crusher (7). The at least one collecting conveyor belt receives and conveys material to be conveyed passing directly through the screen system (6) as well as material to be conveyed that was crushed by the crusher (7). Figure 3 furthermore illustrates an optional discharge boom (9) having a main conveyor belt (91) for removing the material to be conveyed from the mobile crushing system (1).

In contrast to the illustration in figure 2, it will be seen from figure 4 that the screen system (7), designed as a finger screen, and the crusher (7), designed as an eccentric roll crusher, are designed to have a synergistic action according to the invention. Thus, the mobile crush ing system (1) is balanced in terms of machine dynamics. By way of example, however, the finger elements (61) of the screen system (6) can be excited by the eccentric movement of the eccentric roll (72) of the eccentric roll crusher. Thus, there is no longer a need for a sepa rate vibratory drive of the kind which is still present according to the prior art in figure 1.

In particular, it is envisaged that the finger elements (61) of the finger screen transfer the ma terial to be conveyed directly from the feed conveyor apparatus (42) into the crushing cham ber (71) of the crusher (7). There are thus no further fixedly mounted intermediate stages or mechanical components for transfer of the material to be conveyed inside or outside the screen, and therefore slight excitation by the eccentric roll (72) is sufficient, for example, to transfer the material to be conveyed.

In particular, it can be seen from figure 4 that the finger screen is connected to the crusher (7). In this case, this connection is, in particular, of detachable configuration.

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Figure 4 furthermore illustrates the direction of rotation of the eccentric shaft of the eccentric roll (72).

In accordance with the preferred exemplary embodiment in figure 4, it is furthermore dis closed that the finger elements (61) of the finger screen project at an end into the crushing chamber (71) of the crusher (7), wherein the finger elements (61) at least partially overlap the eccentric roll (72), with the result that the material to be conveyed having piece sizes below a defined size passes directly downward between the finger elements (61) ahead of the eccen tric roll (72) in the conveying direction (F), and material to be conveyed having piece sizes greater than or equal to the defined size is moved onward into the crushing chamber (71) in the conveying direction (F) on the finger elements (61), along the main extension axis (H) thereof.

Figure 5 illustrates schematically that the main extension axes (H) of the finger elements (61) of the finger screen are parallel to one another. In this case, the finger elements (61) and the reference signs of the main extension axes (H) of the finger elements (61) are distinguished only by a single reference sign for reasons of clarity.

Figure 6 discloses, by way of example, that the finger screen has an excitation unit (74) for exciting the finger elements (61), wherein the excitation unit (74) is arranged at the rear end of the finger elements (61) in the conveying direction (F). The finger elements (61) are pref erably excited by the excitation unit (74).

In this case, the excitation of the finger elements (61) by the excitation unit (74) can be ac complished by driving a camshaft (76) in rotation, wherein the individual finger elements (61) of the finger screen are preferably each arranged on a cam. As a result, the individual finger elements (61) are each excited cyclically, whereby the material to be conveyed thereon can be moved along the main extension axis of the finger elements (H) or between the finger el ements (61). The rotary motion of the camshaft (76) is illustrated by way of example by an arrow in figure 6.

At an end, the finger elements (61) rest, in particular, on a supporting strip (77), which, by way of example, is connected in a sprung manner to the eccentric roll (72) of the eccentric roll crusher. The supporting strip (77) can have recesses for the individual finger elements (61), into which the finger elements (61) are inserted in order to avoid a translational move ment along the main extension axis of the supporting strip (77). The main extension axis of the supporting strip (77) extends perpendicularly to the main extension axis (H) of the finger elements (61). As an alternative, provision can be made for the supporting strip (77) to be connected to the housing of the eccentric roll crusher.

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Alternatively, provision can be made for the finger elements (61) to rest continuously on the eccentric roll (72) and to be taken on by the eccentric movements of the eccentric roll (72) in a cyclical sequence of motion.

Likewise as an alternative, it is possible for the finger elements (61) to be arranged at least in the space for the movement of the eccentric roll (72) and to be repeatedly nudged or raised by the eccentrically moving eccentric roll (72). As a particular preference, the stroke range of the raised finger elements (61) is from 3 to 20 millimeters.

Because of the eccentric rotary motion of the eccentric roll (61), the fact that the finger ele ments (61) rest in a sprung manner on the eccentric roll (72) leads to an additional excitation of the finger screen. Owing to the different forms of excitation, the material to be conveyed can be transferred into the crusher in a manner which is as far as possible optimal. A com pact construction of the screen system (6) and of the crusher (7) is thereby made possible.

Each possibility for the abovementioned excitations of the finger elements (61) can also be implemented separately. Furthermore, it is explicitly possible for the finger elements (61) also to be excited by means that are not disclosed in order to move the material to be conveyed.

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List of reference signs

1 Mobile crushing system 2 Support structure 3 Undercarriage 4 Feed device 41 Receiving hopper 42 Feed conveyor apparatus 6 Screen system 61 Finger elements 7 Crusher 71 Crushing chamber 72 Eccentric roll 73 Inlet hood 74 Excitation unit 76 Camshaft 77 Supporting strip 8 Collecting conveyor belt 9 Discharge boom 91 Main conveyor belt of the discharge boom

F Conveying direction H Main extension axis of the finger elements

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Claims

1. A mobile crushing system for crushing and conveying material to be conveyed in a conveying direction, having a support structure on at least one undercarriage, where in the support structure has: - a feed device having a receiving hopper and a feed conveyor apparatus, - a screen system for receiving the material to be conveyed from the feed conveyor apparatus and screening said material to be conveyed in such a way that material to be conveyed having piece sizes below a defined size passes through directly and material to be conveyed having piece sizes greater than or equal to the de fined size is moved onward substantially in the conveying direction, - a crusher having a crushing chamber for receiving the material to be conveyed having piece sizes greater than or equal to the defined size from the screen sys tem, and crushing said material, and - at least one collecting conveyor belt arranged below the screen system and below the crusher for receiving and conveying material to be conveyed that has passed directly through the screen system and material to be conveyed crushed by the crusher, wherein the crusher is an eccentric roll crusher having an eccentric roll and the screen system is a finger screen having a plurality of finger elements, wherein the fin ger elements each have a main extension axis.

2. A mobile crushing system as claimed in claim 1, wherein the eccentric roll crusher is balanced in terms of machine dynamics.

3. A mobile crushing system as claimed in the preceding claim, wherein the eccentric roll crusher has at least one inertia mass for balancing in terms of machine dynamics.

4. A mobile crushing system as claimed in any one of the preceding claims, wherein the finger elements of the finger screen transfer the material to be conveyed directly from the feed conveyor apparatus into the crushing chamber of the crusher.

5. A mobile crushing system as claimed in any one of the preceding claims, wherein the finger screen is connected to the crusher or to an inlet hood of the crusher.

6. A mobile crushing system as claimed in the preceding claim, wherein the finger screen is connected detachably to the crusher or to the inlet hood of the crusher.

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7. A mobile crushing system as claimed in any one of the preceding claims, wherein the finger elements of the finger screen project at an end into the crushing chamber of the crusher, wherein the finger elements at least partially overlap the eccentric roll, with the result that the material to be conveyed having piece sizes below a defined size passes directly downward between the finger elements ahead of the eccentric roll in the conveying direction, and material to be conveyed having piece sizes greater than or equal to the defined size is moved onward into the crushing chamber in the conveying direction on the finger elements, along the main extension axis thereof.

8. A mobile crushing system as claimed in any one of the preceding claims, wherein the support structure can be decoupled from the undercarriage.

9. A mobile crushing system as claimed in any one of the preceding claims, wherein the main extension axes of the finger elements of the finger screen are parallel to one another.

10. A mobile crushing system as claimed in any one of the preceding claims, wherein the finger screen has an excitation unit for exciting the finger elements, wherein the exci tation unit is arranged at the rear end of the finger elements in the conveying direc tion.

11. A method for crushing and conveying material to be conveyed in a conveying direc tion using a mobile crushing system, wherein the method comprises: - charging a feed device with material to be conveyed, having a receiving hopper and a feed conveyor apparatus, - subsequently conveying the material to be conveyed using the feed conveyor ap paratus from the receiving hopper to the point of discharge onto a screen system, - subsequent reception of the material to be conveyed by the screen system in or der to screen said material to be conveyed in such a way that material to be con veyed having piece sizes below a defined size passes through directly and mate rial to be conveyed having piece sizes greater than or equal to the defined size is moved onward to a crusher substantially in the conveying direction, and - subsequent crushing of the material to be conveyed that was moved onward to the crusher, wherein the material to be conveyed that has passed through directly in the screen system and the material to be conveyed crushed in the crusher is received by at least one collecting conveyor belt, which is arranged below the screen system and below the crusher, and is conveyed in the conveying direction,

18268210_1 (GHMatters) P113741.AU wherein the crusher is an eccentric roll crusher having an eccentric roll and in that the screen system is a finger screen having a plurality of finger elements, wherein the finger elements each have a main extension axis.

12. A method for crushing and conveying material to be conveyed using a mobile crush ing system as claimed in the preceding claim, wherein the mobile crushing system is the mobile crushing system as claimed in any of claims 1 to 10.

13. A method for crushing and conveying material to be conveyed using a mobile crush ing system as claimed in either of claims 11 or 12, wherein the finger screen is excit ed in such a way that, depending on the piece size, the material to be conveyed passes through the finger elements of the finger screen or is transferred to the crush er along the main extension axis of said elements.

14. A method for crushing and conveying material to be conveyed using a mobile crush ing system as claimed in any one of claims 11 to 13, wherein the excitation of the fin ger elements results from contacts with the eccentrically moving eccentric roll which crushes the material to be conveyed.

15. A method for crushing and conveying material to be conveyed using a mobile crush ing system as claimed in any one of claims 11 to 14, wherein the excitation of the fin ger elements is accomplished using an excitation unit.

16. A finger screen for screening material to be conveyed on a mobile crushing system as claimed in claim 10, wherein the finger screen has a plurality of finger elements and the finger elements each have a main extension axis, wherein the finger screen has an excitation unit for exciting the finger elements, wherein the excitation unit is ar ranged at the rear end of the finger elements in the conveying direction.

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6

42 AA 4 8 71 41 7 1/6

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