Slurry treatment equipment

Abstract

An apparatus (110 or 10) for treating a flocculated slurry (18) having an initial liquid content, comprising: a treatment device defining a treatment zone (114) wherein the slurry (18) is supported on a treatment surface (16) of the treatment device; a feeding device (116) for feeding the slurry (18) into the apparatus (110 or 10); and an outlet (118) through which the output product (24) is discharged from the treatment zone (114), where the treatment surface (16) is configured such that interaction between the treatment surface (16) and the slurry (18) causes at least a portion of the liquid within the slurry (18) to be separated therefrom such that the liquid content of the output product (24) is lower than the initial liquid content.

Description

Technical Field

[0001] The present invention relates to a dewatering and / or densifying and / or compaction device. More specifically, the present invention relates to devices, systems, and methods for the primary dewatering and densifying process of flocculated slurries (such as flocculated tailings streams) to produce products for direct disposal or for further secondary processing to manufacture high-density transportable products for dry tailings disposal. Background Art

[0002] In-line flocculation is a recognized primary tailings dewatering method, mainly used for dewatering mature fine tailings (MFT) in the oil sands industry for final tailings disposal. Mature fine tailings with medium-high solid concentrations (>25% m) consist of slurries with pumpable consistency, are pumped from existing tailings storage dams, and are in-line flocculated to achieve a "white soft cheese" type of consistency.

[0003] The flocculated slurry is discharged from the end of the pipeline into a designed tailings storage facility (TSF), where the clear water is discharged, and the solids are further densified only by gravity.

[0004] On the other hand, thickeners are commonly used primary dewatering devices in mineral processing and other industries. Three processes, namely flocculation, solid-liquid separation, and solid consolidation, occur in the same unit.

[0005] Flocculation usually occurs in the feed well. After that, the flocculated solids are separated from the clarified liquid, resulting in an overflow of the storage tank. The solids settle to the bottom of the storage tank to form a "mud bed", which is then further dewatered and densified only by gravity or by shear-assisted gravity consolidation with a pile rake installed.

[0006] The low-density (or high-density paste) thickened underflow is usually hydraulically transported to the TSF for disposal.

[0007] If dry stacking disposal is adopted, the thickener underflow needs to be directed to a secondary dewatering device, which mechanically compacts the underflow. The secondary dewatering device usually takes the form of a filter (in the form of a vacuum filter or a pressure filter), a centrifuge, or a press (in the form of a screw press or a belt press), which uses a pure mechanical compaction method to produce a very high-density tailings product suitable for conveyor transportation.

[0008] Traditional primary dewatering equipment (thickeners and less commonly used in-line flocculation and) is used for high-volume, relatively low-cost tailings dewatering and densification methods. However, since they rely only on gravity-assisted consolidation processes, they cannot produce high-density products. In contrast, secondary dewatering equipment can produce high-density products by using mechanical compaction processes. However, this advantage is offset by high power, high-cost requirements, and low-tonnage production. Therefore, there is a need for a low-cost, low-power, and high-volume alternative equipment, system, and method for primary dewatering, densification, and / or compaction.

[0009] Accordingly, one object of the present invention is to provide an apparatus, system, and method for primary dewatering, densification, and / or compaction of a flocculated slurry that will at least partially address the above disadvantages.

[0010] Another object of the present invention is to provide an apparatus, system, and method for primary dewatering, densification, and / or compaction of a flocculated slurry that will be a useful alternative to existing apparatus, systems, and methods. Summary of the Invention

[0011] According to a first aspect of the present invention, there is provided an apparatus for treating a flocculated slurry having an initial liquid content, the apparatus comprising:

[0012] Treatment means defining a treatment zone in which the slurry is supported on a treatment surface of the treatment means;

[0013] Feeding means for feeding the slurry into the apparatus;

[0014] A discharge outlet through which an output product is discharged from the treatment zone;

[0015] wherein the treatment surface is configured such that the interaction between the treatment surface and the slurry causes at least a portion of the liquid in the slurry to separate from the slurry, such that the liquid content of the output product is lower than the initial liquid content.

[0016] The interaction between the treatment means and the slurry that causes at least a portion of the liquid therein to separate includes displacement and / or movement of the treatment surface relative to the slurry.

[0017] The displacement and / or movement of the treatment means relative to the slurry operably produces a "kneading" or "massaging" action on the slurry, thereby gently mechanically squeezing the liquid from the slurry.

[0018] The treatment means may be arranged to receive the slurry located on top thereof in use.

[0019] The apparatus may include a displacement mechanism for operably displacing the treatment means relative to the slurry.

[0020] The processing device can be made of a material with a certain coefficient of friction that facilitates or aids in the separation of liquid from the slurry.

[0021] The processing device can be porous or perforated and can allow some liquid to drain through the processing device under the action of gravity.

[0022] The device can also include a collection container for collecting the liquid separated from the slurry. The collection container can be arranged below the processing device.

[0023] The device can also include a conveying device for transporting the product discharged from the discharge port of the processing device.

[0024] The processing device can be formed by a flexible sheet. The flexible sheet can be supported by at least a first roller that forms part of a displacement mechanism. The flexible sheet can be suspended from at least the first roller.

[0025] The flexible sheet can be formed into a sleeve that can be arranged around at least the first roller and supported by being suspended therefrom. The processing zone can be formed by a first trough-shaped portion of the sleeve.

[0026] The displacement mechanism can include a second roller. The sleeve can be arranged around the second roller and supported by the second roller by being suspended therefrom.

[0027] The first roller and the second roller can be arranged substantially parallel to each other.

[0028] The displacement mechanism can include a drive unit. The drive unit can include a motor (such as an electric, hydraulic or pneumatic motor) and a transmission.

[0029] The transmission can be constituted by one of a belt and pulley device, or a sprocket and chain device. Alternatively, the drive unit and the transmission can be integrated in the form of a motor-gear device.

[0030] The displacement mechanism can also include a drive roller driven by the drive unit. The drive roller can be arranged between the first roller and the second roller.

[0031] The device can include a bottom roller that supports the bottom of the sleeve such that a first trough-shaped portion and a second trough-shaped portion are formed towards opposite sides of the bottom roller, the first trough-shaped portion defining the processing zone and the second trough-shaped portion defining the feeding zone. In use, the slurry can be deposited on the processing device or the sleeve in the feeding zone, and then the slurry can be transported by the processing device or the sleeve from the feeding zone over the bottom roller and towards the processing zone.

[0032] Each of the first trough portion and the second trough portion may be associated with a tensioning device to maintain the shape of the trough portion and keep the processing device taut in use. The tensioning device may include contact shoes running on the outer edge of the processing device.

[0033] The feeding device may be arranged in the second trough portion or the feeding zone.

[0034] The feeding device may include:

[0035] A distribution header that includes a plurality of outlets spaced along the width of the processing device; and / or

[0036] A feed container into which the plurality of outlets supply the slurry, and the feed container is open at the top to define an overflow port, thereby allowing the slurry to overflow and flow onto the processing device; and / or

[0037] A feed tray in which the feed container is arranged.

[0038] Each outlet of the distribution header may be associated with an outlet conduit.

[0039] The feed container may include a plurality of separated compartments, each compartment being associated with a different outlet of the distribution header and being fed by a different outlet of the distribution header.

[0040] The distribution header may be arranged above the feed container.

[0041] This arrangement allows the outlet conduits to supply the slurry to the bottom of their respective compartments, so that the slurry in their respective compartments can rise from the bottom to the overflow port in a gentle and controlled manner at a controlled or predetermined rising rate.

[0042] The feed tray may include an overflow port that overflows into a collection container. The feed tray may contain water. The level of the overflow port may be selected according to whether the slurry is supplied to the feed container underwater or at a position close to the ground. In one example, the overflow port of the feed container may be lower than the overflow port of the feed tray, so that the feed container can be operably immersed below the water level in the feed tray and help supply the slurry underwater to the feed tray. In another example, the overflow port of the feed container may be higher than the overflow port of the feed tray, so that it can operably help supply the slurry to the feed tray at a position close to the ground.

[0043] The configuration of the feeding device (including its driving rate, its manufacturing material (and coefficient of friction), the angle of the feeding device near the overflow of the feed container, etc.) enables the slurry to be transported by the feeding device over the bottom roller and flow towards the processing area.

[0044] The processing device or sleeve may be associated with a tracking device. At least one of the first and second rollers may include radially extending teeth, cogs, or pins that engage with appropriate openings or slots formed in the sleeve. The openings or slots may be in the form of slots cut into the sleeve, or rings or perforations formed sequentially around the perimeter of the sleeve. Alternatively, a reinforcing band provided with slots may be adhered to the sleeve. The reinforcing band may be made of a polymeric material (such as polyurethane).

[0045] The teeth, cogs, or pins may be formed towards either side of the roller. Both rollers may be provided with teeth, cogs, or pins.

[0046] In use, the teeth, cogs, or pins may be used to drive the sleeve; and / or to keep the portion of the sleeve extending at the apex between the first and second rollers substantially taut; and / or to keep the shape or length of the free-hanging portion substantially constant.

[0047] A doctor blade may be provided in contact with the processing device or sleeve outside and after the processing zone to help remove any material that may adhere to the processing device or sleeve.

[0048] The apparatus may include a water spray bar for rinsing the outer surface of the sleeve. The water used in rinsing the sleeve may be collected by a collection container.

[0049] The collection container may drain into a return pipe.

[0050] The apparatus may include a material displacement device mounted in or near the processing zone to transfer the output product from the processing zone and prevent material from accumulating in the processing zone.

[0051] The material displacement device may include a plow device. Using the plow device, the output product may be pushed to one or both sides of the processing zone for deposition in the processing zone.

[0052] The plow device may include a central blade and at least a first disc plow towards one of its sides.

[0053] Displacing the output product by the plow device may cause a folding action of the output product, which may further cause dehydration of the output product.

[0054] In an alternative embodiment according to the first aspect of the present invention, the processing device includes only a first trough-shaped portion.

[0055] The apparatus according to the alternative embodiment may further include a loading port for depositing a slurry onto the processing device, and the slurry travels along the travel / feed direction from the loading port.

[0056] In some cases, the displacement of the processing surface may constitute vibration or agitation of the surface. The processing surface may be substantially flat or trough-shaped.

[0057] In the case where the processing device includes a flexible sheet, at least the first roller may extend substantially in the traveling direction.

[0058] Alternatively, the first roller and the second roller may converge in the traveling / feeding direction.

[0059] The rollers may be arranged substantially horizontally. Alternatively, the rollers may be inclined upward in the displacement direction such that the loading port is lower than the discharge port. Additionally, optionally, the rollers may be inclined downward in the displacement direction such that the loading port is higher than the discharge port to provide a gravity-assisted displacement of the slurry relative to the processing surface.

[0060] The apparatus may include a main structure. The first roller and the second roller may be mounted to a sub-frame, and the sub-frame may be pivotally mounted on the main structure.

[0061] A rocking device may be provided to cause a rocking motion of the sub-frame. The rocking device may include a rocking motor for driving a crank or a rocking transmission.

[0062] The rocking device may cause a further displacement of the processing surface in use.

[0063] The drive unit and the transmission of the displacement mechanism may also be mounted on the sub-frame.

[0064] The displacement of the processing surface may cause the slurry to be displaced in the traveling direction.

[0065] In use, the first roller and the second roller may be driven in the same or opposite rotational directions. The first roller and the second roller may be mechanically linked together.

[0066] The portion of the sleeve that extends between the first roller and the second roller at the top may be kept substantially taut.

[0067] In use, the drive unit may drive the rollers by rotating or oscillating the rollers.

[0068] In some cases, the rollers may have a coarse pitch helical outer surface for creating wrinkles in the sleeve, which may cause a positive conveying motion or a peristaltic motion to displace the slurry in the traveling direction.

[0069] The drive roller may be one or both of the first roller and the second roller.

[0070] In some examples, a slurry drive mechanism may be provided for displacing the slurry in the traveling direction. The slurry drive mechanism may include a first-pitch auger that may rotate to drive the slurry in the traveling direction. The slurry drive mechanism may also include a second-pitch auger.

[0071] According to a second aspect of the present invention, there is provided a system for processing a slurry, the system comprising:

[0072] Slurry feed;

[0073] Flocculant metering and flocculation device; and

[0074] An apparatus according to the first aspect of the present invention, wherein the flocculant metering and flocculation device receives the slurry feed, flocculates the slurry by metering the flocculant to the slurry and allowing flocs to be formed, and supplies the flocculated slurry to the treatment device of the apparatus through the feed device of the apparatus.

[0075] The flocculant metering and flocculation device may include an on-line flocculant metering and flocculation device. The flocculant metering and flocculation device may use a high molecular weight polyethylene oxide (POE) flocculant or a polyacrylamide reagent to flocculate the slurry.

[0076] According to a third aspect of the present invention, there is provided a method for treating flocculated slurry having an initial liquid content, the method comprising the following steps:

[0077] 1) Providing an apparatus according to the first aspect of the present invention;

[0078] 2) Supplying the slurry to the treatment device of the apparatus through the feed device;

[0079] 3) Displacing the slurry relative to the treatment device;

[0080] 4) Separating at least a portion of the liquid from the slurry while the slurry is being displaced relative to the treatment device; and

[0081] 5) Discharging an output product through the discharge port of the apparatus, the output product having a lower liquid content than the initial liquid content.

[0082] Before the above step 2, the following steps may be included:

[0083] 2a) Receiving a slurry feed from a feed source;

[0084] 2b) Flocculating the slurry using a flocculant metering and flocculation device; and

[0085] 2c) Supplying the flocculated slurry to the loading port.

[0086] Step 2b) may include adding a high molecular weight polyethylene oxide (POE) flocculant to the slurry to flocculate the slurry.

[0087] The above step 4 may include displacing the treatment device relative to the slurry to separate water from the slurry and dehydrate, densify and compact the flocs. The displacement of the treatment device may cause the flocs to roll by themselves under the action of gravity and be mechanically kneaded. Description of the Drawings

[0088] The present invention will now be described in more detail, by way of example only, with reference to the accompanying drawings, in which:

[0089] Figure 1 Shows a side perspective view of an apparatus for processing slurry according to the present invention;

[0090] Figure 2 Shows Figure 1 A cross-sectional side view of the apparatus;

[0091] Figure 3 Shows the formation of Figure 1 A detailed side view of the doctor blade device that is part of the apparatus;

[0092] Figure 4 Shows the association with Figure 1 A detailed view of the second trough-shaped portion or feed portion of the processing device associated with the feed device of the apparatus;

[0093] Figure 5 Shows Figure 1 A front view of the apparatus;

[0094] Figure 6 Shows Figure 1 A perspective view of the feed device of the apparatus;

[0095] Figure 7 Shows Figure 1 A side view of the first trough-shaped portion or processing zone of the apparatus, including a material displacement device;

[0096] Figure 8 Shows Figure 7 A detailed rear view of the details of the material displacement device;

[0097] Figure 9 Shows a side perspective view of an alternative exemplary embodiment of an apparatus for processing slurry according to the present invention;

[0098] Figure 10 Shows Figure 9 A detailed perspective view of the displacement mechanism of the apparatus;

[0099] Figure 11 Shows Figure 9 A front view of the apparatus;

[0100] Figure 12 Shows Figure 9 A top view of the apparatus;

[0101] Figure 13 Shows Figure 9 A schematic side view of the apparatus;

[0102] Figure 14 Shows Figure 9 A schematic side view of an alternative exemplary embodiment of the apparatus;

[0103] Figure 15 shows Figure 9 a schematic side view of another alternative exemplary embodiment of the device. Detailed Description

[0104] Before explaining any embodiments of the present invention in detail, it should be understood that the application of the present invention is not limited to the structural details and component arrangements set forth in the following description or shown in the following drawings. The present invention can have other embodiments and can be practiced or carried out in various ways. Further, it should be understood that the terminology and terms used herein are for the purpose of description and should not be regarded as restrictive. As used herein, the terms "comprising", "including" or "having" and their variants are intended to include the items listed hereinafter and their equivalents as well as additional items. Unless otherwise stated or limited, the terms "mounted", "connected", "joined" and their variants are used broadly and encompass direct and indirect mounting, connecting, supporting and coupling, and are thus intended to include a direct connection between two members without any other member intervening therebetween; and an indirect connection between members, where one or more other members intervene therebetween. Further, "connected" and "joined" are not limited to physical or mechanical connection or coupling. Additionally, the words "lower", "upper", "upward", "downward" and "down" denote directions in the reference drawings. The term includes the specifically mentioned words above, their derivatives and words with similar meanings. It should be noted that, as used in this specification and the appended claims, the singular forms "a", "an" and "the", as well as any singular use of any word, include plural referents unless expressly and unambiguously limited to one referent. As used herein, the term "comprising" and its grammatical variants are intended to be non - restrictive, such that the items listed in a list do not exclude other similar items that may be substituted or added to the listed items.

[0105] In the drawings, like reference numerals denote like features. Referring to Figures 1 to 8 , according to the present invention, a first non - limiting example of a device for treating slurry is generally denoted by the reference numeral 110. Figures 9 to 15 A second non - limiting example of a device for treating slurry according to the present invention is shown, and this second example device is generally denoted by the reference numeral 10. Both devices 110 and 10 are used for the primary dehydration, densification and / or compaction of the slurry, which is generally denoted by the reference numeral 18. The slurry is transported from a storage facility (not shown) such as a tailings dam or a metallurgical processing plant or a pretreatment device (a flocculant metering and flocculation device (not shown)).

[0106] The slurry 18 has an initial liquid content (before dehydration, densification, and / or compaction by device 110 or 10), and may typically undergo some pre-treatment before being fed into device 110 or 10. Generally, the slurry 18 is a flocculated slurry. This will be introduced in detail below.

[0107] Now specifically refer to Figures 1 to 8 . Device 110 includes a processing device which, in this exemplary embodiment, takes the form of a flexible material sheet 112 and is formed as an annular sleeve. In the present invention, the processing device, sheet, and sleeve will all be referred to with the reference numeral 112. The processing device 112 defines a processing zone 114 (best shown in Figure 2 and Figure 7 ), where the slurry 18 is supported on top of the processing device or sheet 112.

[0108] Device 110 also includes a feeding device 116 which is used to convey the slurry 18 to device 110, and more specifically, onto the processing device 112. Once conveyed onto the processing device 112, the interaction between the processing device or sheet 112 and the slurry 18 causes at least a portion (or most) of the liquid in the slurry to separate therefrom, resulting in an output product with a lower liquid content than the initial liquid content. Considering this interaction, the sheet 112 is specifically selected.

[0109] As described above, the interaction between the sheet 112 and the slurry 18 and the resulting processing effect are first affected or promoted by the material type and structure of the sheet 112, and second by the operating displacement of the processing device relative to the slurry 18.

[0110] The interaction between the processing device 112 and the slurry 18 causes at least a portion of the liquid in the slurry 18 to separate from the slurry. This interaction is generally caused by the displacement and / or movement of the processing device 112 relative to the slurry 18, which can cause the slurry 18 to gently roll or fold onto itself. The displacement and / or movement of the processing device 112 relative to the slurry 18 operably causes a mechanical "kneading" or "massaging" action on the slurry 18, thereby gently squeezing the liquid out of the slurry 18. This action is gentle so as not to cause the output product to break or disintegrate.

[0111] For this purpose, the sheet 112 is made of a porous or perforated material to allow the liquid to drain therefrom under the action of gravity. In addition, the material used to manufacture the sheet 112 has a predetermined coefficient of friction, which helps the interaction between the sheet 112 and the slurry 18, and thus helps to separate a portion of the liquid from the slurry 18.

[0112] The sheet typically has a coefficient of friction that is selected based on the interaction between the sheet and the slurry. Generally, a higher coefficient of friction is beneficial for the compaction of the slurry, the separation of some liquid from the slurry, and the consolidation of multiple individual flocs, particles, agglomerates, or lumps. In addition, friction and relative displacement cause these individual flocs to roll on their own, thereby promoting their compaction and further dewatering. It should be understood that when entering the processing device, the flocs are relatively fragile. Therefore, the amount and intensity of the relative displacement and the surface coefficient of friction are all pre-selected and configured to prevent the flocs from breaking. Therefore, this process is gentle and can be compared to kneading or massaging the flocs. Therefore, this process is a low-pressure process, different from the process of applying mechanical pressure or compression to the slurry. Therefore, the flocs are received relatively loosely on the processing device 112.

[0113] The output product is discharged from the device 110 through the discharge port 118. In the drawings, the discharge port is schematically shown facing one side of the device 110. However, in practice, the device typically may include a second discharge port 118 facing the second side or the opposite side of the device 110, such that the output product can be discharged from either side of the processing zone 114.

[0114] It should be understood that the device 110 converts the pumped slurry into an output product that is stable enough, has a sufficiently high internal strength, and is sufficiently dry to be transported by a conveying device. The conveying device transports the output product to a downstream processing facility (not shown), where further secondary dewatering processing can be carried out. Alternatively, the output product can be directly disposed of, and the conveying device can transport the output product to a disposal facility or a transport vehicle.

[0115] The device 110 includes a displacement mechanism or device 120 for displacing the processing device relative to the slurry 18. The displacement mechanism 120 includes various components and will be collectively referred to by the reference numeral 120. The displacement mechanism 120 includes, for example, rollers that support the sleeve 112 in use, and a drive mechanism that drives the rollers. This will be described in detail below.

[0116] Towards the bottom of the device 110, particularly at least directly below the processing zone 114, there is a collection container 122 with a drain port 124. The collection container 122 catches or collects the liquid separated from the slurry, as well as the overflow liquid associated with the feeding device 116, as discussed more fully below. The liquid is discharged from the collection container 122 through the drain port 124 and can be discarded, recycled, or reused in a known manner.

[0117] The displacement mechanism 120 includes a main drive roller 126 which is arranged towards the central top of the device 110 and is driven by a motor-gear unit 128. The motor of the motor-gear unit 128 can generally be an electric motor, although it is also feasible to use other motors such as pneumatic, hydraulic or internal combustion engines. The gear unit of the motor-gear unit 128 can include any suitable transmission device, such as a unit including meshing gears, a sprocket and chain assembly, a belt and pulley assembly, etc. The drive roller 126 is covered with a gripping material, such as natural or synthetic rubber, so that it can grip the sleeve 112 and displace it.

[0118] The displacement mechanism 120 further includes additional support rollers, such as a first roller 130 and a second roller 132. The first roller 130 and the second roller 132 are arranged towards opposite sides of the drive roller 126, and both are used to support the sleeve 112. The sleeve 112 is suspended on the first roller 130 and the second roller 132, so that the sleeve 112 runs on the first roller 130 and the second roller 132. The first roller 130 and the second roller 132 are arranged substantially parallel to each other.

[0119] The drive mechanism 120 includes a bottom roller 134, whose physical position is below the drive roller 126, the first roller 130 and the second roller 132. The sleeve 112 runs on the bottom roller 134, so that a first grooved portion 136 of the (sleeve 112) is formed towards the first side of the bottom roller 134, and a second grooved portion 138 of the (sleeve 112) is formed towards the second side of the bottom roller 134. The processing area 114 is associated with the first grooved portion 136, while the feeding device 116 is associated with the second grooved portion 138, so that a feeding area 140 is defined within the second grooved portion 138. This will be discussed more comprehensively below.

[0120] The first grooved portion 136 and the second grooved portion 138 are associated with respective tensioning devices, which provide tension to the bottom of the sleeve 112 and help to maintain the shape of the grooved portions (136, 138). The tensioning devices are in the form of contact shoes 142, which run on the outer surface portion of the sleeve at the bottom of the respective grooved portions (136, 138).

[0121] In some cases, the sleeve 112 may be associated with a tracking device (not shown) that ensures correct alignment and tracking of the sleeve during use. Tracking devices of known types may be used. In some cases, at least one of the first roller 130 and the second roller 132 may include radially extending teeth, cogs or studs that engage with suitable openings or slots formed in the sleeve 112. The openings or slots may be in the form of slots cut into the sleeve, rings or perforations formed sequentially around the perimeter of the sleeve. Optionally, a reinforcing band provided with slots may be adhered to the sleeve. The reinforcing band may be made of a polymeric material, such as polyurethane.

[0122] The teeth, cogs or studs may be formed towards either side of the first roller 130 and / or the second roller 132.

[0123] In use, the slurry 18 is deposited in the feed zone 140 by a feed device 116 (described below) and deposited onto the sleeve 112, and then the slurry 18 is transported over the bottom roller 134 and fed into the processing zone 114. The angle of the sleeve 112 adjacent to the feed zone 140 (which is determined by the position of the bottom roller 134 and the spacing between the bottom roller 134 and the contact shoe 142 associated with the second trough portion 138) is small enough to ensure that the slurry can be transported over the bottom roller 134. Thus, this angle is also determined by the friction between the sleeve 112 and the slurry 18. When the slurry is carried towards the bottom roller 134, a small amount of liquid may have dripped through the sleeve and thus separated from the slurry 18.

[0124] The feed device 116 includes a main feed inlet 144 through which the slurry 18 is provided to the apparatus 110 via a distribution manifold 146. The distribution manifold 146 is associated with a plurality of outlets, each provided with an outlet conduit 148. Each outlet conduit 148 may also be associated with a separate shut-off valve 150. The outlets and the outlet conduits 148 are spaced along the width of the apparatus 110, or at least along the width of the feed zone 140 or the sleeve 112.

[0125] The feed device 116 further includes a feed container 152. The feed container extends along the width towards the bottom of the second trough portion 138. The outlet conduits 148 feed the slurry 18 into the feed container 152, more specifically, into the bottom of the feed container. The distribution manifold 146 extends above the feed container 152, and thus the outlet conduits 148 extend downwardly towards the feed container 152. The top of the feed container 152 is open and defines an overflow port 154 towards its front upper side. Thus, when the slurry 18 is fed into the feed container 152, the slurry slowly overflows the overflow port 154 and spills onto the sleeve 112, from where the sleeve 112 carries the slurry towards the processing zone 114 as described above.

[0126] The feed container 152 includes a plurality of compartments 156, each compartment being associated with a different outlet conduit 148. The separated compartments 156 assist and facilitate better distribution of the slurry across the width of the sleeve 112.

[0127] Since the slurry is fed to the bottom of the compartment 156, the "rise rate" or flow rate of the slurry within the compartment can be controlled. In this way, the flow rate of the slurry 18 can be controlled and the slurry 18 can be fed slowly in a controlled manner, thereby avoiding slurry disintegration.

[0128] The feeding device 116 further includes a feed tray 158, and the feed container 152 is arranged within the feed tray 158. The feed tray 158 further includes an overflow port 160. In use, the feed tray 158 is filled with water. The water and / or other liquid within the feed tray 158 overflows from the overflow port 160 into the collection container 122.

[0129] The level height of the overflow port 154 relative to the level height of the overflow port 160 is important. In one example, the slurry 18 is fed to the feed container 152 at a position close to the ground. In this case, the overflow port 160 is located at a lower position than the overflow port 154. In another example, the slurry 18 is fed to the feed container 152 underwater. In this case, the level height of the overflow port 160 is higher than the level height of the overflow port 154, such that the feed container 152 is immersed in the water contained in the feed tray 158. In the latter example, feeding the slurry 18 underwater to the feed container 152 also helps to ensure that the slurry 18 is fed smoothly to the device 110.

[0130] The device may further include a tensioning roller 162 that induces tension in the sleeve 112 between the contact shoe 142 associated with the first trough-shaped portion 136 and the first roller 130. The tensioning roller 162 also determines the return angle of the sheet 112, which is the angle of the sheet 112 directly after the processing area 114 (the return portion 164 of the sleeve). This angle is steep, thereby preventing material from being carried out of the processing area 114 by the sleeve 112. The return angle can be such that the return portion 164 extends substantially vertically. Thus, the material within the processing area 114 will generally roll, fold, and spill by itself without being carried out of the processing area 114 by the return portion 164 of the sheet.

[0131] Nevertheless, a scraper device 166 can still be provided to remove any material that may adhere to the sleeve 112 and may have been carried out of the processing area 114 by the return portion 164.

[0132] In addition, the device 110 may include a water spray bar 168 that can spray water onto the rear surface or bottom surface of the sleeve 112 to help remove any other materials adhering to the sleeve 112 by flushing the sleeve 112. Similarly, the water used in this process is collected in a collection container.

[0133] The device 110 may further include a material displacement device 170 installed in or near the processing area 114. With the material displacement device 170, the materials accumulated in the processing area 114 can be moved out of or away from the processing area 114. As Figure 8 best shown, the material displacement device 170 may include a main blade 172 installed in the center and a plurality of disk plows or blades 174. Thus, the main blade 172 and the disk plows 174 can push the materials accumulated in the processing area 114 towards the discharge port 118. This pushing of the materials will cause the materials to fold gently further by themselves, thereby resulting in the removal of more liquid from the materials. Alternatively, a dynamic material displacement device (not shown) may be provided, which may be in the form of a coarse-pitch auger and is driven by one of the plurality of rollers. The auger can push the materials towards the discharge port and can again cause the materials to roll or fold by themselves. The auger will again be configured to cause a slow displacement of the materials so as not to cause the materials to disintegrate.

[0134] It should be understood that the output product received from the device 110 through the discharge port 118 is at least partially dehydrated, and thus is denser, more compact, and stronger. Therefore, such an output product is suitable for downstream secondary processing or direct disposal as required.

[0135] Original version:

[0136] Now refer to Figures 9 to 15 . The device 10 includes a charging port 12 through which the slurry 18 is fed or loaded into the device 10. The charging port 12 may be formed at the end of a feed pipe 14 that conveys the slurry from a storage facility (not shown) such as a tailings dam or a metallurgical processing plant or a pretreatment device (such as a flocculant metering and flocculation device not shown).

[0137] The device further includes a processing device in the form of a surface 16 that is associated with a processing area. As further discussed below, the processing surface 16 may take various forms.

[0138] Typically, the processing surface 16 supports the slurry 18 (on top of it), and the slurry 18 travels or displaces along the processing surface 16 in the travel, discharge, or feed direction 20. The device also includes a discharge port 22, which is typically formed at the end of the processing surface 16, and the output product 24 is discharged from the device 10 (or more specifically from the processing surface 16) through the discharge port 22. It should be understood that the output product consists of the slurry in a dehydrated, densified, and / or compacted form. Therefore, the liquid content of the output product 24 is typically lower than that of the slurry 18.

[0139] In addition, the processing surface 16 is configured such that the interaction between the slurry 18 and the processing surface 16 causes dehydration, densification, and / or compaction of the slurry 18 to produce the output product 24. Therefore, due to the interaction between the slurry 18 and the processing surface 16, at least a portion of the liquid in the slurry 18 separates therefrom. This will be discussed more comprehensively below.

[0140] As described above, the interaction between the processing surface 16 and the slurry 18 and the resulting processing effect are first influenced or facilitated by the type and structure of the material of the processing surface 16, and second by the operating displacement of the processing surface 16 relative to the travel or feed direction 20, and thus by the operating displacement relative to the slurry 18.

[0141] The processing surface 16 typically has a coefficient of friction that is selected based on the interaction between the processing surface 16 and the slurry. Generally, a higher coefficient of friction is beneficial for the compaction of the slurry, the separation of a portion of the liquid from the slurry, and the consolidation of multiple individual flocs, particles, agglomerates, or lumps. In addition, friction and relative displacement cause these individual flocs to roll on their own, thereby promoting their compaction and further dehydration. It should be understood that when entering the processing surface 16, the flocs are relatively fragile. Therefore, the amount and intensity of the relative displacement and the surface coefficient of friction are all pre-selected and configured to prevent the flocs from breaking. Therefore, this process is gentle and can be compared to a kneading or massaging action on the flocs. Therefore, this process is a low-pressure process, different from the process of applying mechanical pressure or compression to the slurry. Therefore, the flocs are received on the processing surface 16 relatively loosely.

[0142] The processing surface 16 is porous or perforated and allows the liquid portion separated from the slurry as described above to drain through the processing surface under the action of gravity. Based on the type of slurry, the pore size of the porous or perforated processing surface 16 is selected. Generally, the pore size is selected to allow the liquid to pass through easily (therefore, large enough to overcome the surface tension of the liquid), but not so large as to allow the flocs to pass through.

[0143] In some embodiments, the treatment surface 16 may be made of a substantially rigid material. The treatment surface 16 may be substantially flat or grooved. In other embodiments, as Figures 1 to 6 shown, the treatment surface may be formed from a flexible fabric sheet. This will be discussed more fully below.

[0144] A collection container or tray 28 is disposed below the treatment surface for collecting the liquid separated from the slurry 18. The liquid collected in the collection container or tray 28 is returned via a return conduit 30 to a processing plant or storage facility for future use or disposal.

[0145] A conveying device 32 is configured to convey an output product 24 discharged from the treatment surface 16 through an outlet 22. It should be understood that the apparatus 10 converts the pumped slurry into an output product 24 that is stable enough, has a sufficiently high internal strength and is sufficiently dry to be transported by the conveying device 32. The conveying device 32 transports the output product to a downstream processing facility (not shown) where further secondary processing can be performed. Alternatively, the output product can be directly disposed of, and the conveying device 32 can transport the output product to a disposal facility or a transport vehicle.

[0146] The apparatus 10 is provided with a displacement mechanism 26 that causes or induces an operational displacement of the treatment surface 16. The displacement may take the form of the treatment surface 16 vibrating, oscillating or agitating.

[0147] As described above, in the Figures 1 to 6 embodiment shown, the treatment surface 16 is formed from a flexible sheet 34. In particular, the flexible sheet 34 is formed as a sleeve. The two ends of the sheet 34 are joined together by clamping joints to form an annular sleeve. The sleeve is suspended from and hangs down from a first roller 36 and a second roller 38, and the rollers (36, 38) form part of the displacement mechanism 26. The first roller 36 and the second roller 38 extend substantially along the travel or feed direction 20, the first roller 36 and the second roller 38 are arranged parallel to each other and are spaced apart above the treatment surface 16.

[0148] The sleeve defines a freely hanging grooved bottom 40. The treatment surface 16 is formed on the inside of the freely hanging bottom 40. In use, the slurry 18 presses down the bottom. The portion 42 of the sleeve that extends between the two rollers (36, 38) remains substantially taut. The two rollers (36, 38) are arranged in positive mechanical communication, for example interconnected by a chain or belt 46 that forms part of a transmission 48 of the displacement mechanism 26. Thus, the rollers (36, 38) rotate together.

[0149] The roller is formed with multiple sets of radially extending teeth, cogs or studs (whose positions are indicated by reference numeral 44), which engage with openings or slots (not shown) formed around the periphery of the sleeve. The openings or slots can be cut into the sleeve, or can be formed by rings or eyelets, or can be formed in a gasket or reinforcing strip made of a polymeric material (such as polyurethane) and fixed to the outer periphery of the sleeve.

[0150] These teeth serve to keep the upper part 42 of the sleeve taut and to maintain the shape and length of the freely hanging part 40 of the sleeve relatively constant.

[0151] The sleeve is also driven by the interaction between the teeth and the openings or slots in the sleeve.

[0152] The displacement mechanism 26 includes a drive unit in the form of an electric, hydraulic or pneumatic motor 50, which drives the rollers (36, 38) via a transmission 48. The transmission 48 also includes pulleys 52 on the motor 50 and the rollers (36, 38). Thus, the driving of the rollers (36, 38) causes the sleeve to rotate during use, which results in the continuous displacement of the processing surface 16 in a direction perpendicular to the travel or feed direction 20.

[0153] The apparatus includes a main structure 54. The rollers (36, 38) are fixed to the main structure 54 by a sub-structure 56. The sub-structure 56 is pivotally fixed to the main structure 54 by a set of bearings 58. The motor 50 is also mounted on the sub-structure 56. The sub-structure 56 can pivot or swing relative to the main structure 54.

[0154] A swinging device 60 is mounted on the main structure 54 for imparting an effective swinging motion to the sub-structure 56. Thus, the relative displacement of the processing surface 16 has a component caused by the swinging of the sub-structure 56.

[0155] The swinging device 60 includes a swinging motor 62 mounted on the main structure 54, the swinging motor 62 being fitted with a crank member 64, and a set of rocker arms 66 connecting between the crank member 64 and the sub-structure 56.

[0156] In some cases, the apparatus 10 can be fitted with a water spray bar or header (not shown) for spraying water onto the flexible sheet 34 during use to remove or wash away portions of the flocculant adhering thereto. The water sprayed by the water spray bar can be collected in the collection container 28.

[0157] The displacement of the processing surface 16, together with the effect of gravity, causes the slurry 18 to be displaced in the displacement or feed direction 20.

[0158] In some cases not shown, the roller may have a helical outer surface, thereby forming wrinkles in the sleeve. When the roller rotates, the wrinkles can cause a positive conveyance or peristaltic movement, which can result in the displacement of the slurry 18 in the travel or feed direction 20.

[0159] The device 110 or 10, as appropriate, may form part of a slurry processing system that also includes an upstream flocculant metering and flocculation device (not shown). Such a system forms part of the present invention. The flocculant metering and flocculation device typically takes the form of an in-line flocculation device that utilizes a high molecular weight polyethylene oxide (POE) reagent or a polyacrylamide reagent as the metering reagent. The flocculant metering and flocculation device includes a pipe within which flocs can be generated in the correct mixing and flow regime. Subsequently, the flocculated slurry is supplied to the processing device or surface, and the slurry is further processed as described above.

[0160] It should be understood that the above description provides only exemplary embodiments of the present invention, and that many variations are possible without departing from the spirit and / or scope of the present invention. Additionally, features disclosed with respect to one exemplary embodiment may be compatible with another exemplary embodiment unless otherwise stated or the context otherwise indicates.

[0161] In Figure 9 and Figure 10 the example of, the rollers (36, 38) are arranged substantially horizontally. However, in alternative embodiments, as Figure 11 shown, the rollers (36, 38) are slightly inclined upward such that the loading port 12 is lower than the discharge port 22. In another alternative embodiment (not shown), the rollers (36, 38) are slightly inclined downward (along the displacement direction) such that the loading port 12 is higher than the discharge port 22. In this way, gravity assists the positive flow or displacement of the slurry 18 relative to the processing surface 16. It should be understood that the gravity-assisted displacement remains a gentle displacement. The gravity-assisted displacement further promotes the "kneading", "rolling", or "massaging" action on the slurry.

[0162] Furthermore, in some cases of the device 10, the two rollers (36, 38) converge towards the discharge port 22, which makes the contact angle of the sleeve smaller in the travel or feed direction 20, and this can slightly increase the degree of contact with the slurry in the travel or feed direction to increase the amount of compaction achieved by the processing surface 16.

[0163] Furthermore, as Figure 14 shown, in some configurations, the displacement mechanism 26 can cause the rollers (36, 38) to oscillate rather than rotate.

[0164] It is foreseeable that some embodiments may include only the first roller 36.

[0165] In another example, a dynamic slurry drive mechanism (not shown) can be provided for moving the slurry in the travel, feed direction 20. The slurry drive mechanism can take the form of a first pitch auger that rotates to drive the slurry in the travel, feed direction 20. The slurry drive mechanism can also include a second pitch auger. However, it should be understood that the slurry drive mechanism has a very gentle interaction with the slurry and does not cause the flocs to break.

[0166] In another example, the apparatus can include a multi-stage apparatus in which more than one processing surface 16 is arranged in series along the travel or feed direction 20. The various processing surfaces can have different configurations (e.g., different coefficients of friction and different pore sizes). Such different configurations can be based on the amount or degree of dehydration or compaction that has occurred. Additionally, the various processing surfaces can move at different speeds and / or intensities.

[0167] As can be readily understood from this application, as generally described and shown in the drawings, the specific features of the present invention can be arranged and designed according to a variety of different configurations. In this way, the description of the present invention and the associated drawings are not intended to limit the scope of the present invention, but merely to represent selected embodiments.

[0168] Those skilled in the art will understand that, unless otherwise stated or these features are clearly incompatible, the technical features of a given embodiment can actually be combined with the features of another embodiment. Additionally, unless otherwise stated, the technical features described in a given embodiment can be separated from the other features of that embodiment.

Claims

1. An apparatus for treating a flocculated slurry having an initial liquid content, comprising: a treatment device that defines a treatment zone in which the slurry is supported on a treatment surface of the treatment device; a feeding device for feeding the slurry into the apparatus; a discharge outlet through which an output product is discharged from the treatment zone; wherein the treatment surface is configured such that the interaction between the treatment surface and the slurry causes at least a portion of the liquid in the slurry to separate therefrom, so that the liquid content of the output product is lower than the initial liquid content.

2. The apparatus according to claim 1, wherein the interaction between the treatment device and the slurry that causes at least a portion of the liquid in the slurry to separate therefrom includes displacement and / or movement of the treatment surface relative to the slurry.

3. The apparatus according to claim 2, wherein the displacement and / or movement of the treatment device relative to the slurry operably produces a "kneading" or "massaging" action on the slurry, thereby gently mechanically squeezing the liquid out of the slurry.

4. The apparatus according to any one of the preceding claims, wherein the treatment device is arranged to receive the slurry at its top in use.

5. The apparatus according to any one of the preceding claims, wherein the apparatus includes a displacement mechanism for operably moving the treatment device relative to the slurry.

6. The apparatus according to any one of the preceding claims, wherein the treatment device is made of a material having a coefficient of friction that facilitates the separation of liquid from the slurry.

7. The apparatus according to any one of the preceding claims, wherein the treatment device is porous or perforated, allowing a portion of the liquid to drain through the treatment device under the action of gravity.

8. The apparatus according to any one of the preceding claims, further comprising a collection container for collecting the liquid separated from the slurry.

9. The apparatus according to claim 8, wherein the collection container is arranged below the treatment device.

10. The apparatus according to any one of the preceding claims, further comprising a conveying device for transporting the product discharged from the treatment device through the discharge outlet.

11. The apparatus according to any one of the preceding claims, wherein the treatment device is formed by a flexible sheet.

12. The apparatus according to claim 11, wherein the flexible sheet is supported by at least a first roller, and the first roller forms part of the displacement mechanism.

13. The apparatus according to claim 12, wherein the flexible sheet is suspended on the first roller.

14. The apparatus according to any one of claims 11 to 13, wherein the flexible sheet is formed as a sleeve that is arranged around the first roller and is supported by the first roller by being suspended on the first roller.

15. The apparatus according to claim 14, wherein the treatment zone is formed by a first trough-shaped portion of the sleeve.

16. The apparatus according to any one of claims 5 to 15, wherein the displacement mechanism includes a second roller.

17. The device according to claim 16, wherein, the sleeve is arranged around the second roller and is supported by the second roller by being suspended on the second roller.

18. The device according to claim 16 or 17, wherein, the first roller and the second roller are arranged substantially parallel to each other.

19. The device according to any one of claims 5 to 18, wherein, the displacement mechanism includes a drive unit.

20. The device according to claim 19, wherein, the drive unit includes a transmission and a motor, and the motor is, for example, an electric, hydraulic or pneumatic motor.

21. The device according to claim 20, wherein, the transmission is constituted by one of a belt and pulley device, or a sprocket and chain device.

22. The device according to claim 21, wherein, the drive unit and the transmission are integrated and are in the form of a motor-gear unit.

23. The device according to any one of claims 19 to 22, wherein, the displacement mechanism further includes a drive roller, and the drive roller is driven by the drive unit.

24. The device according to claim 23, wherein, the drive roller is arranged between the first roller and the second roller.

25. The device according to any one of claims 14 to 24, wherein, the device includes a bottom roller, and the bottom roller supports the bottom of the sleeve such that a first trough-shaped part and a second trough-shaped part are formed towards opposite sides of the bottom roller, the first trough-shaped part defining the processing area and the second trough-shaped part defining the feeding area.

26. The device according to any one of the preceding claims, wherein, the slurry is deposited on the processing device or the sleeve in the feeding area, and the slurry is transported from the feeding area by the processing device or the sleeve over the bottom roller and flows towards the processing area.

27. The device according to claim 25 or 26, wherein, the first trough-shaped part and the second trough-shaped part are associated with a tensioning device to maintain the shape of the trough-shaped parts and to keep the processing device taut during use.

28. The device according to claim 27, wherein, the tensioning device includes contact shoes that run on the outer edge of the processing device.

29. The device according to any one of claims 25 to 28, wherein, the feeding device is arranged in the second trough-shaped part or the feeding area.

30. The device according to any one of the preceding claims, wherein, the feeding device includes: a distribution header that includes a plurality of outlets spaced apart along the width of the processing device; and / or a feeding container, and the plurality of outlets supply the slurry into the feeding container, and the feeding container is open at the top to define an overflow opening so as to allow the slurry to overflow and flow onto the processing device; and / or a feeding tray, and the feeding container is arranged in the feeding tray.

31. The device according to claim 30, wherein, each outlet of the distribution header is associated with an outlet conduit.

32. The device according to claim 30 or 31, wherein, The feed container includes a plurality of separated compartments, each compartment being associated with a different outlet of the distribution manifold and being fed by a different outlet of the distribution manifold.

33. The apparatus according to any one of claims 30 to 32, wherein, the distribution manifold is arranged above the feed container.

34. The apparatus according to claim 32 or 33, wherein, the feeding device is designed such that the outlet conduit feeds the slurry to the bottom of the corresponding compartment, which allows the slurry in each compartment to rise from the bottom to the overflow opening in a gentle and controlled manner at a controlled or predetermined rising rate.

35. The apparatus according to any one of claims 30 to 34, wherein, the feed tray includes an overflow opening that overflows into the collection container, and the feed tray contains a certain water level to facilitate the overflow under water.

36. The apparatus according to any one of claims 30 to 34, wherein, the feed tray includes an overflow opening that overflows into the collection container, and the feed tray contains a certain water level to facilitate the overflow near the ground.

37. The apparatus according to any one of the preceding claims 25 to 36, wherein, the feeding device is configured such that the slurry is transported by the feeding device over the bottom roller and flows towards the processing area, and the configuration of the feeding device includes its driving rate, its manufacturing material, and the coefficient of friction, the angle of the feeding device near the overflow of the feed container, and similar configurations.

38. The apparatus according to any one of the preceding claims 25 to 37, wherein, the processing device or sleeve is associated with a tracking device, wherein at least one of the first roller and the second roller includes radially extending teeth, cogs, or pins configured to engage with appropriate openings or slots formed in the sleeve, and the openings or slots are in the form of slots cut into the sleeve or in the form of rings or perforations sequentially formed around the perimeter of the sleeve.

39. The apparatus according to claim 38, wherein, as an alternative to the openings or slots formed in the sleeve, a reinforcing band with slots is provided, and the reinforcing band is adhered to the sleeve.

40. The apparatus according to claim 39, wherein the reinforcing band is made of a polymeric material.

41. The apparatus according to claim 40, wherein the polymeric material includes polyurethane.

42. The apparatus according to any one of claims 38 to 41, wherein, the teeth, cogs, or pins are formed towards either side of the roller.

43. The apparatus according to any one of claims 38 to 42, wherein, both rollers are provided with teeth, cogs, or pins.

44. The apparatus according to any one of claims 38 to 43, wherein, the teeth, cogs, or pins are used to drive the sleeve, and / or to keep the top-extending portion of the sleeve between the first roller and the second roller substantially taut, and / or to keep the shape or length of the free-hanging portion substantially unchanged.

45. The device according to any one of the preceding claims further comprises a scraper which contacts the processing device or the sleeve, the scraper being located outside and after the processing area for helping to remove any material that may adhere to the processing device or the sleeve.

46. The device according to any one of the preceding claims further comprises a water spray bar for rinsing the outer surface of the sleeve, and the water used in rinsing the sleeve is collected by the collection container.

47. The device according to any one of claims 8 to 46, wherein, the collection container discharges into a return pipe.

48. The device according to any one of the preceding claims further comprises a material displacement device installed in or near the processing area to transfer the output product from the processing area and prevent material from accumulating in the processing area.

49. The device according to claim 48, wherein, the material displacement device comprises a plow device for pushing the output product to one or both sides of the processing area and depositing the output product from the processing area.

50. The device according to claim 49, wherein, the plow device comprises a central blade and at least a first disk plow on one side of the central blade.

51. The device according to claims 49 and 50, wherein, the plow device displaces the output product, causing the output product to fold to help dehydrate the output product.

52. The device according to any one of the preceding claims except claims 25, 27 and 29, wherein, the processing device only comprises a first trough-shaped part.

53. The device according to any one of the preceding claims further comprises a loading port for depositing the slurry onto the processing device, and the slurry travels along the traveling or feeding direction.

54. The device according to any one of claims 5 to 53, wherein, the displacement of the processing surface causes vibration or agitation of the processing surface.

55. The device according to any one of the preceding claims, wherein, the processing surface is substantially flat.

56. The device according to any one of claims 1 to 54, wherein, the processing surface is trough-shaped.

57. The device according to any one of the preceding claims, wherein, the processing device comprises a flexible sheet, and the at least first roller extends substantially along the traveling direction.

58. The device according to claim 16 or 57, wherein, the first roller and the second roller converge in the traveling direction.

59. The device according to any one of the preceding claims, wherein, the rollers are arranged substantially horizontally.

60. The device according to claim 53, wherein, the rollers are arranged inclined upward along the displacement direction such that the loading port is lower than the discharge port.

61. The device according to claim 53, wherein, the rollers are arranged inclined downward along the displacement direction such that the loading port is higher than the discharge port to facilitate the displacement of the slurry relative to the processing surface by gravity assistance.

62. The device according to any one of claims 5 to 61, wherein, The device includes a main structure, and the first roller and the second roller are mounted on a sub-frame, and the sub-frame is pivotally mounted on the main structure.

63. The device according to claim 62, further comprising a rocking device for causing a rocking movement of the sub-frame.

64. The device according to claim 63, wherein, the rocking device includes a rocking motor that drives a crank or a rocking transmission.

65. The device according to claim 63 or 64, wherein, the rocking device causes a further displacement of the processing surface during use.

66. The device according to any one of claims 5, 12, 16, 19 and 20, wherein, the drive unit and the transmission of the displacement mechanism are mounted on the sub-frame.

67. The device according to any one of claims 2 to 66, wherein, the displacement of the processing surface causes the displacement of the slurry in the traveling direction.

68. The device according to any one of claims 5 to 67, wherein, the first roller and the second roller are driven in the same or opposite rotational directions.

69. The device according to any one of claims 5 to 68, wherein, the first roller and the second roller are mechanically linked together.

70. The device according to any one of claims 14 to 69, wherein, the portion of the sleeve extending at the top between the first roller and the second roller remains substantially taut.

71. The device according to any one of claims 19 to 70, wherein, the drive unit drives at least the first roller and the second roller by rotating or swinging at least the first roller and the second roller.

72. The device according to any one of claims 16 to 71, wherein, the rollers have a helical outer surface and have a pitch that forms a fold in the sleeve, and the fold causes a forward conveying movement or a peristaltic movement to displace the slurry in the traveling direction.

73. The device according to any one of claims 23 to 72, wherein, the drive roller is located on one or both of the first roller and the second roller.

74. The device according to any one of the foregoing claims, further comprising a slurry drive mechanism for displacing the slurry in the traveling direction.

75. The device according to claim 74, wherein, the drive mechanism includes a first-pitch auger that is rotatable to drive the slurry in the traveling direction.

76. The device according to claim 75, wherein, the drive mechanism includes a second-pitch auger.

77. A system for processing slurry, comprising: a flocculant metering and flocculation device; and a device for processing flocculated slurry having an initial liquid content, wherein the flocculant metering and flocculation device receives a slurry feed, flocculates the slurry feed by metering a flocculant to the slurry and allowing flocs to be generated, and the flocculated slurry is supplied to the processing device of the device through the feed device of the device.

78. The system according to claim 77, wherein, the flocculant metering and flocculation device includes an on-line flocculant metering and flocculation device.

79. The system according to claim 78, wherein, the flocculant metering and flocculation device flocculates the slurry using a high molecular weight polyethylene oxide flocculant or a polyacrylamide reagent.

80. A method for treating a flocculated slurry having an initial liquid content, the method comprising the steps of: 1) providing a device for treating a flocculated slurry having an initial liquid content; 2) feeding the slurry onto the treatment device of the device through a feeding device; 3) displacing the slurry relative to the treatment device; 4) separating at least a portion of the liquid from the slurry while the slurry is displaced relative to the treatment device; and 5) discharging an output product through the discharge port of the device, the output product having a lower liquid content than the initial liquid content.

81. The method according to claim 80, wherein, before step 2, the method includes the steps of: 2a) receiving a slurry feed from a feed source; 2b) flocculating the slurry using a flocculant metering and flocculation device; and 2c) feeding the flocculated slurry to a loading port.

82. The method according to claim 81, wherein, step 2b) includes adding a high molecular weight polyethylene oxide flocculant to the slurry to flocculate the slurry.

83. The method according to any one of claims 80 to 82, wherein, step 4 includes displacing the treatment device relative to the slurry to separate water from the slurry and dehydrate, densify and compact the flocs.

84. The method according to claim 83, wherein, the displacement of the treatment device causes the flocs to roll on their own under the action of gravity and be mechanically kneaded.

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