Abstract
The disclosure relates to a device (1) for recycling building material (2), which contains a base material and a binder, with a receiving container (3, 3a, 3b) for the building material (2), wherein the building material (2) in the receiving container (3, 3a, 3b) can be acted upon by at least one nozzle (4) with a high-pressure water jet (5) for detaching the binder from the base material. Furthermore, the disclosure relates to a method for recycling building material (2).
Claims
1. Device (1) for recycling building material (2) containing a base material and a binder, comprising a receiving container (3, 3a, 3b) for the building material (2), characterized in that the building material (2) in the receiving container (3, 3a, 3b) can be acted upon by a high-pressure water jet (5) through at least one nozzle (4) for detaching the binder from the base material.
2. Device (1) according to claim 1, characterized in that the high-pressure water jet (5) has a water pressure at the nozzle (4) of more than 1000 bar, for example 1000 to 5000 bar, for example 1000 to 3000 bar.
3. Device (1) according to claim 1, characterized in that at least one actuator (6) is arranged on the receiving container (3, 3a, 3b), which is designed to set the building material (2) in motion under simultaneous impact with the high-pressure water jet (5).
4. Device (1) according to claim 3, characterized in that the high-pressure water jet (5) of the at least one nozzle (4) is directed in such a way that the movement (7) of the building material (2) is supported.
5. Device (1) according to claim 3, characterized in that the actuator (6) is designed to set the receiving container (3, 3a, 3b) in motion by means of imbalance, the motion of the receiving container (3, 3a, 3b) in combination with the high-pressure water jet (5) being designed to fluidize the building material (2) received in the receiving container (3, 3a, 3b) and to set it in a vortex-like, for example circulating motion.
6. Device (1) according to claim 1, characterized in that the receiving container (3, 3a, 3b) is designed as a trough-shaped throughput vibrator (8).
7. Device (1) according to claim 6, characterized in that the trough-shaped throughput vibrator (8) is designed to trigger a trowalizing movement (7) of the building material (2) in the receiving container (3, 3a, 3b).
8. Device (1) according to claim 7, characterized in that the high-pressure water jet (5) of at least one nozzle (4) is oriented in such a way that the trowalizing movement (7) of the building material (2) is assisted by water power.
9. Device (1) according to claim 6, characterized in that a plurality of nozzles (4) are arranged along the trough-shaped throughput vibrator (8), which assist the trowalizing movement (7) of the building material (2) along the trough-shaped throughput vibrator (8) by water power.
10. Device (1) according to claim 6, characterized in that at least one nozzle (4) is oriented in such a way that the nozzle (4) sprays at least one high-pressure water jet (5) in the direction of a deepest point (21) of the trough-shaped throughput vibrator (8).
11. Device (1) according to claim 6, characterized in that a plurality of nozzles (4) are arranged along the trough-shaped throughput vibrator (8), each of which is oriented such that the nozzles (4) each spray at least one high-pressure water jet (5) in the direction of a deepest point (21) of the trough-shaped throughput vibrator (8).
12. Device (1) according to claim 1, characterized in that at least one nozzle (4) generates a plurality of high-pressure water jets (5) rotating about a nozzle rotation axis (22), wherein the radiation directions (23) of the rotating high-pressure water jets (5) are aligned parallel to the nozzle rotation axis (22).
13. Device (1) according to claim 1, characterized in that at least one nozzle (4) is arranged to be moved laterally in a circulating manner with respect to a radiation direction (23) of the high-pressure water jet (5).
14. Device (1) according to claim 1, characterized by a detaching device (9) for separating detached binder and base material.
15. Device (1) according to claim 14, characterized in that the detaching device (9) comprises at least one sieve (24) arranged at the bottom of the receiving container (3, 3a, 3b) and adapted to let through detached binder and water and to retain building material (2) and base material in the receiving container (3, 3a, 3b).
16. Device (1) according to claim 14, characterized in that the detaching device (9) comprises at least one cyclone (25) for separating detached binder and base material.
17. Method for recycling building material (2) containing a base material and a binder, for example with a device (1) according to claim 1, comprising the following steps: Filling building material (2) into a receiving container (3, 3a, 3b), detachment of the binder from the base material by impacting the building material (2) in the receiving container (3, 3a, 3b) with a high-pressure water jet (5), and separation of the detached binder from the base material.
18. Method according to claim 17, characterized in that the filing of building material (2), the detachment of the binder from the base material and the separation of the detached binder from the base material are carried out in several successive passes, the particle size of the base material separated from the binder being reduced with each pass.
Description
[0029] Further features, details and advantages of the invention will be apparent from the following description and from the drawings, which show examples of embodiments of the invention. Corresponding objects or elements are provided with the same reference signs in all figures. Showing:
[0030] FIG. 1 device according to the invention,
[0031] FIG. 2 view of the trough-shaped througput vibrator,
[0032] FIG. 3 another view of the trough-shaped throughput vibrator,
[0033] FIG. 3a another view of the trough-shaped throughput vibrator,
[0034] FIG. 4 actor,
[0035] FIG. 5 section along the trough-shaped throughput vibrator,
[0036] FIG. 6 section through the trough-shaped throughput vibrator,
[0037] FIG. 7 section through another trough-shaped throughput vibrator
[0038] FIG. 8 view of a nozzle,
[0039] FIG. 9 detailed view of a nozzle,
[0040] FIG. 10 another view of the device,
[0041] FIG. 11 flow chart for recycling of building material, and
[0042] FIG. 12 further flow chart for recycling of building material.
[0043] In FIG. 1, designated with the reference sign 1, a device according to the invention is shown. The device 1 is used for recycling building material 2 (FIG. 2), which contains granular base material and adhering binder. It has a receiving container 3 for the building material 2. In the embodiment example shown, the receiving container 3 is designed as a trough-shaped throughput vibrator 8. The volume of the receiving container 3 should comprise at least 2000 liters, preferably even 3000 liters or more. The receiving container 3 is preferably filled with building material 2 at the end by a conveyor feed device 10. The conveyor feed device 10 is preferably designed as a conveyor belt, but may also be designed, for example, as a funnel-shaped silo above the receiving container 3 in order to fill it with granular building material. Also shown in the background is a return device 11 of the device 1, via which the building material 2 (FIG. 2) can be returned for several passes through the trough-shaped throughput vibrator 8. In the embodiment example, the return device 11 is formed by a feed hopper 12 arranged at the end of the trough-shaped receiving container 3 and a return conveyor belt 13 which fills the feed hopper 12 with returned building material 2. At the opposite end of the trough-shaped throughput vibrator 8, the detaching device 9 of the device 1 is arranged, via which detached binder and base material can be separated. The detaching device 9 has, among other things, a wet sieving for grains between 0.063 mm and 32 mm in diameter. The detachment of the binder from the grains of the building material 2 takes place in the trough-shaped throughput vibrator 8.
[0044] FIG. 2 shows a view of the trough-shaped throughput vibrator 8 of the device 1. Here it can be seen that the building material 2 in the receiving container 3 is each acted upon by a high-pressure water jet 5 via several nozzles 4 for detaching the binder from the base material. This allows the binder to be detached from the base material particularly efficiently. The impingement of the base material 2 in the receiving container 3 with high-pressure water jets 5 provided via the nozzles 4 enables efficient recycling, since the binder can thereby be easily detached from the base material grains.
[0045] Advantageously, several nozzles 4 are arranged along the trough-shaped throughput vibrator 8, as can also be seen from FIG. 3. The spacing of the nozzles 4 can also be selected so that the combined high-pressure water jets 5 of the nozzles 4 form a continuous water jet wall along the throughput vibrator 8. The high-pressure water jet 5 preferably has at all nozzles 4 a water pressure of over 1000 bar, preferably 1000 to 5000 bar, further preferably 1000 to 3000 bar, since in this pressure range a particularly effective detachment of the binder from the base material is possible with the sprayed-on water. The receiving container 3 is lined from the inside with a protective lining 14, which protects the receiving container 3 against abrasion by the building material 2. The receiving container 3 is preferably lined with a polyurethane. The preferred spacing of the nozzles 4 along the trough-shaped throughput vibrator 8 is 50 cm.
[0046] FIG. 3a shows an embodiment in which the nozzles along the trough-shaped throughput vibrator 8 are designed as a water jet bar 20. As a result, the interaction of the nozzles of the water jet bar 20 creates a continuous water jet wall 5 along the throughput vibrator 8.
[0047] FIG. 4 shows a view of the actuator 6 arranged on the receiving container 3. This actuator 6 serves to set the building material 2 in motion in the receiving container 3. At the same time, the building material 2 (FIG. 2) is exposed to high-pressure water jets 5 (FIG. 3) from the nozzles 4 (FIG. 3). This supports the movement of the building material 2 (FIG. 2) in the receiving container 3 (FIG. 2), as will be explained in more detail below. The actuator 6 is designed to set the receiving container 3 in motion by means of imbalance. For this purpose, the actuator 6 has a drive 15 which drives a drive shaft 16. The drive shaft 16 is mounted on the receiving container 3, with a plurality of imbalance weights 17 being arranged on the drive shaft 16, which are set in rotation via the drive 15 and the drive shaft 16. The receiving container 3 is spring-mounted on a frame 19 via a plurality of springs 18, so that the imbalance generated by the imbalance weights 17 causes the receiving container 3 to oscillate. This movement of the receiving container 3 is designed to fluidize the building material 2 received in the receiving container 3 and to set it into a vortex-like, in particular circulating movement 7 (FIG. 5).
[0048] This is indicated in FIG. 5, which shows a sectional view along the trough-shaped throughput vibrator 8 (FIG. 3 or 3a). As can be seen, the trough-shaped throughput vibrator 8 set in motion provides a trowalizing movement 7 of the building material 2 in the receiving container 3. The nozzles 4 (FIG. 2) arranged along the trough-shaped throughput vibrator 8 or the water jet bar 20 (FIG. 3a) 19 support this trowalizing movement 7 of the building material 2 along the trough-shaped throughput vibrator 8 by water force. The movement leads to internal abrasion, i.e. to an abrasive effect of the base material grains among each other. This considerably enhances the detachment of the binder in addition to the direct water jet action. However, the abrasion leads to a high degree of grain fragmentation, so the high frictional energy of the water from the high-pressure water jet is to be used primarily to detach the binder from the moving base material grains.
[0049] In this regard, reference is also made to FIG. 6, which shows a sectional view through the trough-shaped throughput vibrator 8. In this illustration it can be seen that the movement of the receiving container 3 in combination with the high-pressure water jet 5 is designed to fluidize the building material 2 received in the receiving container 3 and to set it into a vortex-like, in particular circulating movement. The high-pressure water jet 5 of the nozzle 4 is aligned in such a way that this trowalizing movement 7 of the building material 2 is supported by water power. For this purpose, the angle of impact of the water jet on the building material 2 in the trowalizing movement 7 is aligned in such a way that the vortex-like, in particular circulating movement 7 is supported tangentially by the high-pressure water jet 5.
[0050] FIG. 7 shows a sectional view through a trough-shaped throughput vibrator 8 in a modified version. In this illustration, it can be seen that the movement of the receiving container 3 in combination with the high-pressure water jet 5 is designed to also fluidize the building material 2 received in the receiving container 3 and to set it into a vortex-like, in particular circulating movement. The high-pressure water jet 5 of the nozzle 4 is also aligned in such a way that the trowalizing movement 7 of the building material 2 is supported by the water force of the high-pressure water jet 5. For this purpose, the nozzle 4 is oriented in such a way that the nozzle 4 sprays at least one high-pressure water jet 5 in the direction of the deepest point 21 of the trough-shaped throughput vibrator 8. As FIG. 3 and FIG. 10 show, several of these nozzles 4 can also be arranged along the trough-shaped throughput vibrator 8 and each be oriented in such a way that the nozzles 4 each spray at least one high-pressure water jet 5 in the direction of a deepest point 21 of the trough-shaped throughput vibrator 8. The orientation of the nozzles 4 ensures particularly effective detachment of the binder from the base material from the building material 2 set in the trowalizing recirculating movement 7. With the orientation of the high-pressure water jets 5 towards the deepest point 21 of the trough-shaped throughput vibrator 8 it can be ensured that the building material 2 acted upon is slowed down in the further recirculated building material 2, before the acted upon building material 2 reaches the deepest point 21 of the trough-shaped throughput vibrator 8. Therefore, damages to the throughput vibrator 8 can be effectively prevented, which the building material 2 accelerated by the high-pressure water jet 5 would produce in the receiving container 3 if the accelerated material 2 were not decelerated in the remaining building material 2. The nozzle 4 shown in FIG. 7 generates a plurality of high-pressure water jets 5 rotating about a nozzle rotation axis 22. The directions of radiation 23 of the rotating high-pressure water jets 5 are oriented substantially parallel to the nozzle rotation axis 22. Via the rotation of the high-pressure water jets 5 about the nozzle rotation axis 22 the point of impact of the high-pressure water jets 5 on the building material 2 located in the receiving container 3 is continuously changed. This can prevent individual grains of the granular building material 2 from being accelerated by the high-pressure water jets 5 in such a way that they emerge from the upwardly open receiving container 3. The rotation of the high-pressure water jets 5 about the nozzle rotation axis 22 also leads to a vortex of the building material 2 located in front of the nozzle 4, which leads in the direction of the deepest point 21 of the trough-shaped throughput vibrator 8. Via this vortex, the detachment of the binder from the base material in front of the nozzle 4 is further intensified. The nozzles 4 of the device 1 may also perform circulation movements laterally to the direction of radiation 23 of the high-pressure water jets 5. These lateral circulation movements of the nozzles 4 continuously change the point of impact of the high-pressure water jets 5 on the building material 2 located in the receiving container 3. This can prevent individual grains of the granular building material 2 hit by the high-pressure water jet 5 from being accelerated in such a way that they emerge from the receiving container 3, which is open at the top. In addition, the lateral displacement of the nozzle 4 relative to the direction of radiation 23 of the high-pressure water jet 5 leads to more effective detachment of the binder from the base material. The lateral circulation movements are preferably elliptical translational movements of the nozzles 4, further preferably in a plane orthogonal to the direction of radiation 23 of the high pressure water jets 5. The lateral feed route for the circulation movements should be between 200 mm and 300 mm. The entire energy of the high-pressure water jet 5 can thus be introduced into the building material 2 and the highest energetic benefit results without the building material 2 flying out of the receiving container 3. For this displacement of the nozzles 4, a nozzle holder 28 (FIG. 3) is provided which can be advanced relative to the receiving container 3 and which is preferably motor-driven in order to change the position of the nozzles 4 relative to the receiving container 3. Preferably, the nozzles 4 can also be positioned by motor in the direction of the receiving container 3 in order to set an optimum distance to the building material 2 located in the receiving container 3. As indicated in FIG. 7, the building material 2 is preferably piled up at an angle in the throughput vibrator as a result of the trowalizing movement. The optimum distance of the nozzles 4 from the building material 2 to achieve effective detachment of binder by means of the high-pressure water jet 5 is 1 mm to 20 mm. Preferably, the nozzles 4 can be lowered at the nozzle holder 28 by half the trough height of the receiving container 3, preferably by up to 300 mm, after the receiving container 3 has been filled. In this way, the nozzles 4 are not in the way when filling the receiving container 3 and an optimum distance can still be set for detaching the binder from the base material. At the bottom of the receiving container 3 shown in FIG. 7, a sieve 24 of the detaching device 9 is shown. This sieve 24 is designed to allow detached binder and water to pass through and to retain building material 2 and base material in the receiving container 3. In this way, the filling level of the receiving container 3 with detached binder and water can be kept low. In this way, the building material 2 remaining in the receiving container 3 may be effectively acted upon with a high-pressure water jet 5. The aim of this detachment via the sieve 24 is merely to retain the base material in the receiving container 3 and to separate the binder detached from the building material 2 and the water via the sieve 24. The grain size of the remaining building material 2 can be adjusted very easily via the selected mesh size of the sieve 24. A larger mesh size of the sieve 24 results in finer base material being separated from the receiving container 3 along with the detached binder. A smaller mesh size, on the other hand, allows the binder to also be detached from finer base material in the receiving container 3. The sieve 24 is preferably arranged laterally offset from the deepest point 21 of the trough-shaped receiving container 3 so that the high-pressure water jet 5 of the centrally arranged nozzle 4 does not accelerate any grains of the building material 2 towards the sieve 24. In this way, damage and heavy wear of the sieve 24 can be prevented. The sieve 24 should preferably have a mesh size of 0.5 mm to 3 mm. In order to keep the sieve 24 free of deposits, a separate rinsing nozzle 26 is provided, with which additional water is rinsed onto the sieve 24. On the one hand, this water flushes detached binder out of the receiving container 3, and on the other hand it ensures that the meshes of the sieve 24 are not clogged with grains of the building material 2. The detached binder and water can be discharged via the discharge channel 27 arranged below the sieve 24 and is preferably recycled, as will be explained later. Via the trowalizing movement 7 of the building material 2 in the throughput vibrator 8, the sieving process is supported by the sieve 24.
[0051] FIG. 8 shows a single view of a nozzle 4 which may generate several high-pressure water jets 5 (FIG. 7) rotating about a nozzle rotation axis 22. For this purpose, the nozzle 4 has a nozzle head 29 rotatable about the nozzle rotation axis 22. This nozzle head 29 can be driven by water power or also by an electric motor for rotation about the nozzle rotation axis 22. The rotation of the nozzle head 29 about the nozzle rotation axis 22 results in a water/building material vortex in front of the nozzle 4. Via this vortex, the detachment of the binder from the base material in front of the nozzle 4 is increased. In addition to the trowalizing movement 7 (FIG. 7) of the building material 2 (FIG. 7) by the throughput vibrator 8 (FIG. 7), this provides additional friction and thus more effective detachment of the binder from the base material. Via the electric motor of the nozzle 4, the rotation of the nozzle head 29 may be optimally adjusted for a high cleaning performance.
[0052] FIG. 9 shows a detailed view of the nozzle 4 as shown in FIG. 8, as seen from the nozzle rotation axis 22. Here it can be seen that the nozzle head 29, which rotates around the nozzle rotation axis 22 (FIG. 8), has a row of individual nozzles 30, each of which generates a high-pressure water jet 5.
[0053] FIG. 10 discloses a bird's-eye view of a device 1 with a trough-shaped throughput vibrator 8. In this embodiment, the receiving container 3 shown, as already shown in sectional view in FIG. 7, has several corresponding sieves 24 arranged along the trough-shaped receiving container 3 at the bottom. These sieves 24, arranged side by side along the trough-shaped receiving container 3 at the bottom of the throughput vibrator 8, each separate detached binder and water and retain the building material 2 (FIG. 5) and the base material in the receiving container 3. The sieves 24 are preferably connected via a common discharge channel 27 (FIG. 7), which is advantageously flushed continuously with water to remove the dissolved binder. For this purpose, additional flushing nozzles are arranged in the discharge channel 27 (FIG. 7) at each sieve 24. FIG. 10 also shows that the sieves 24 are arranged laterally offset from the deepest point 21 of the trough-shaped receiving container 3. A conveyor feed device 10 in the form of a conveyor belt is provided at the end of the receiving container 3, with which the throughput vibrator 8 may be filled with building material 2. In the version shown here, a total of eight nozzles 8 are arranged along the trough-shaped receiving container 3.
[0054] In order to recycle milled building material 2 containing granular base material and adhering binder with the device 1, the building material 2 simply has to be filled into the receiving container 3 (FIG. 1) via the conveyor feed device 10 (FIG. 1).
[0055] Subsequently, the binder is detached from the basic material grains in the receiving container 3 (FIG. 1) by acting upon the building material 2 (FIG. 2) by the high-pressure water jet 5 (FIG. 6). Subsequently, the detached binder is separated from the base material grains by the detaching device 9 (FIG. 1). If the binder is not completely detached during one pass through the trough-shaped receiving container 8 (FIG. 3), the material can be returned for another pass through the throughput vibrator 8 (FIG. 3 or 3a) via the return device 11 (FIG. 1).
[0056] FIG. 11 shows a schematic flow chart for recycling building material with a device 1 according to the invention and with the method according to the invention. First, the building material 2 to be recycled (FIG. 5) is filled into the receiving container 3 of a device 1 according to the invention (FIG. 1) via the conveyor feed device 10. This can be done by means of an excavator or wheel loader, which fills a receiving hopper or a dispenser, via which the conveyor feed device 10 is loaded with building material 2 (FIG. 5). A mechanical pre-treatment of the building material 2 (FIG. 5) may also still take place before the building material 2 (FIG. 5) is filled into the receiving container 3. In the mechanical pretreatment, the building material 2 (FIG. 5) may be granulated. A two-shaft octagonal crusher is particularly suitable for this purpose, since it hardly crushes the base material. This allows compressed conglomerates of the building material 2 (FIG. 5) to be reliably broken up and the building material 2 (FIG. 5) is optimally prepared for detaching the binder from the base material in the device 1 (FIG. 1), since the surface of the building material 2 (FIG. 5) is increased for exposure to the high-pressure water jet 5. Depending on the building material 2 (FIG. 5), the detachment of the binder from the base material can take between 5-20 minutes. During the detachment of the binder from the base material, the material in the receiving container 3 is preferably rinsed via separate rinsing nozzles 26 in order to achieve a higher flowability. However, the flowability is not achieved by the water, but by the additional swirling on the sieves 24 (FIG. 10). These sieves 24 (FIG. 10) are thereby advantageously rinsed free in such a way that the sieve surfaces do not become clogged due to the high fines content and the water can continue to flow off. The sieve area is preferably between 0.4-1 m.sup.2 per trough. A correspondingly larger receiving container 3 will also have a larger sieving area. As soon as the water level in the receiving container 3 is too high, the building material loses its adhesion to the throughput vibrator 8 (FIG. 10) and thus the property of flowability and the trowalizing movement 7 (FIG. 5) for loosening the building material 2 (FIG. 5) breaks down. After the binder has been detached from the building material 2 (FIG. 5) in a first pass, the pre-cleaned base material can be stored in a buffer 32 via a metering belt 31. The metering belt 31 is preferably designed as an exchange belt. This allows finally cleaned base material to be applied to a conveyor belt 33 and stockpiled on a first stockpile 34 for further use.
[0057] The buffer 32 preferably stores pre-cleaned material with a grain size of greater than 2 mm. Subsequently, another batch of building material 2 can be pre-cleaned in the receiving container 3. Precleaning should preferably take about 5 minutes. After two pre-cleanings, the pre-cleaned material stored in the buffer 32 can already be returned to the receiving container 3 via a return device 11. After the subsequent removal of binder in a further pass, the finally cleaned base material is conveyed from the receiving container 3 to the first stockpile 34 and is available for further use. The base material recycled in this way preferably has a grain size of 1 to 22 mm. The water and binder separated during the detachment of the binder from the base material from the receiving container 3, preferably via the sieves 24 (FIG. 10), are advantageously separated from each other in an oil separator 35 and then in a cyclone 25. The water can then be reused to detach binder when a high-pressure water jet 5 (FIG. 7) is acted upon the building material 2 (FIG. 7) in the receiving container 3. Binder can be effectively separated in the oil separator 35. The separated binder can be further processed in a decanter 36 and a thickener 37. Subsequently, the binder can be pressed into a filter cake in a filter press 38 to remove any water still contained therein. There are now two possibilities for using the filter cake, depending on the material. An uncontaminated bituminous filter cake can, for example, be made available to a refinery operator, thus obtaining pure bitumen, or it can be added in small quantities of 10-20% to the asphalt production. In the case of polluted filter cake contaminated with tar, the polluted binder fraction would be removed from the cycle by burning it in a cement plant, for example. The required cement raw material is, among other things, limestone powder. This is contained to 80% in the basic material and the contaminated binder can be used as fuel in the furnace. The binder separated from the cyclone 25 can be filled into a receiving container 3a of a further device 1 according to the invention for a further pass, in order to dissolve the binder from further base material contained therein by means of the method according to the invention. Subsequently, the base material thus dissolved out can be stockpiled on a separate, second stockpile 39. This material preferably has a grain size of 0.063 mm to 1 mm. The binder separated from the receiving container 3a can also be fed to the decanter 36, the thickener 37 and the filter press for further processing.
[0058] FIG. 12 shows a further schematic flow diagram for recycling building material 2 (FIG. 5) with a device 1 according to the invention (FIG. 1) and with the method according to the invention in a slightly different embodiment. First, building material 2 to be recycled is filled into two receiving containers 3 of corresponding devices 1 according to the invention (FIG. 1) via a conveyor feed device 10. A mechanical pre-treatment of the building material 2 (FIG. 5) may also be carried out before the building material 2 (FIG. 5) is filled into the receiving containers 3. After detaching the binder from the building material 2 (FIG. 5) in a first pass, the pre-cleaned base material may be conveyed from the two receiving containers 3 into a further receiving container 3b of a corresponding device 1 according to the invention (FIG. 1). After the subsequent detachment of binder in a further pass in the further receiving container 3b, the finally cleaned base material is conveyed to the first stockpile 34 and is available for further use. The base material stockpiled here preferably has a grain size of 1 to 22 mm. The water and binder separated from the base material during the detachment of the binder from the receiving containers 3, 3b are advantageously separated from each other in an oil separator 35 and then in a cyclone 25. Here, too, the water may then be used again to separate binder when building material 2 (FIG. 7) is acted upon by a high-pressure water jet 5 (FIG. 7) in the receiving containers 3, 3b. For this purpose, the binder from the receiving containers 3, 3b is also separated via the oil separator 35. The separated binder can be further processed in a decanter 36 and a thickener 37. Subsequently, the binder can also be pressed in a filter press 38 to form a filter cake and used further as already described. The binder separated from the cyclone 25 may also be filled into a receiving container 3a of a device 1 according to the invention (FIG. 1) for a further pass, in order to dissolve the binder from further base material contained therein by means of the method according to the invention. Subsequently, the base material thus released may be stockpiled on a separate, second stockpile 39. Depending on the design of the cyclone 25, separated base material therefrom can also be stockpiled directly on the second stockpile 39. This material preferably has a grain size of 0.063 mm to 1 mm.
LIST OF REFERENCE SIGNS
[0059] 1 device [0060] 2 building material [0061] 3 3a 3b receiving container [0062] 4 nozzle [0063] 5 high-pressure water jet [0064] 6 actuator [0065] 7 movement, trowalization movement [0066] 8 throughput vibrator [0067] 9 detaching device [0068] 10 conveyor feed device [0069] 11 return device [0070] 12 feed hopper [0071] 13 return conveyor belt [0072] 14 protective lining [0073] 15 drive [0074] 16 drive shaft [0075] 17 imbalance weights [0076] 18 springs [0077] 19 frame [0078] 20 water jet bar [0079] 21 deepest point in the throughput vibrator [0080] 22 nozzle rotation axis [0081] 23 direction of radiation [0082] 24 sieve [0083] 25 cyclone [0084] 26 rinsing nozzle [0085] 27 discharge channel [0086] 28 nozzle holder [0087] 29 nozzle head [0088] 30 individual nozzles [0089] 31 metering belt [0090] 32 buffer [0091] 33 conveyor belt [0092] 34 first stockpile [0093] 35 oil separator [0094] 36 decanter [0095] 37 thickener [0096] 38 filter press [0097] 39 second stockpile
