High-viscosity tailings feeding metering and slurry preparation device

Abstract

The application provides a high-viscosity tailing feeding metering and slurry preparation device, and belongs to the technical field of material mixing, and comprises a shaping and cutting device, a metering and conveying device, a tailing slurry preparation device, a cement dosage conveying device and a homogenizing and mixing device. The high-viscosity tailing filter cake is shaped and cut into regular tailing blocks through the shaping and cutting device, so that the problem of adhesion to the inner wall of the equipment caused by the high viscosity of the material of the traditional dispersing machine is solved, and then the cohesion of the material is destroyed to provide a uniform material basis for subsequent metering and slurry preparation. The airflow mechanical stirring in the second-stage homogenizing and mixing preparation barrel through the homogenizing and mixing device solves the problem of uneven mixing caused by insufficient time or insufficient intensity of a single stirring mode, and is beneficial to realizing the high-homogeneity preparation of the slurry. Therefore, the application provides an integrated scheme capable of realizing the precise metering and conveying of high-viscosity tailings, the precise metering and conveying of cement and the efficient homogenizing and mixing of the two.

Description

Technical Field

[0001] This invention belongs to the field of material mixing technology, and particularly relates to a high-viscosity tailings feeding metering and slurry preparation device. Background Technology

[0002] In existing technologies, high-viscosity tailings filter cake is prone to clumping due to its high viscosity. When processed by traditional dispersing machines, it tends to adhere to the inner wall of the equipment, making it impossible to achieve effective dispersing and accurate metering, resulting in unstable tailings feeding. Cement feeding often relies on screw feeders, which are prone to blockage due to clumping, leading to poor material flow. Moreover, the metering accuracy is greatly affected by the static pressure inside the silo, making it difficult to guarantee feeding accuracy. At the same time, the mixing of tailings slurry and cement powder often relies on a single stirring method, which either results in uneven mixing due to insufficient stirring time or intensity, or the equipment is too complex and energy-intensive to meet the needs of large production capacity.

[0003] Therefore, the existing technology lacks an integrated solution that can synergistically solve the problems of accurate metering and transportation of high-viscosity tailings, accurate metering and transportation of cement, and efficient homogeneous mixing of the two, which seriously affects the quality stability and preparation efficiency of the filling slurry. Summary of the Invention

[0004] To address the problems existing in the prior art, the present invention provides a high-viscosity tailings feeding metering and slurry preparation device.

[0005] This invention is implemented as follows: a high-viscosity tailings feeding, metering, and slurry preparation device, comprising:

[0006] A shaping and cutting device is used to shape and cut high-viscosity tailings filter cake into regular tailings blocks;

[0007] A metering and conveying device is connected to the output end of the shaping and cutting device and is used to meter and convey the tailings blocks.

[0008] The tailings slurry preparation device includes a first-stage pre-mixing mixer and a buffer tank. The first-stage pre-mixing mixer receives tailings blocks conveyed by the metering and conveying device and adds thickening water. The buffer tank receives the tailings slurry output from the first-stage pre-mixing mixer.

[0009] A cement metering and conveying device includes a cement silo, a rotary feeder, and a weighing sensor. The weighing sensor is used to monitor the weight change of the material in the cement silo to measure the cement feed rate, and the rotary feeder is used to control the cement conveying rate.

[0010] The homogenizing mixing device includes a second homogenizing mixing preparation tank, which receives tailings slurry from the buffer tank through a sand discharge pipe and receives cement powder conveyed by a cement metering and conveying device through a cement homogenizing gas transmission pipe, for mixing the tailings slurry and cement powder to prepare a homogenized slurry.

[0011] In some embodiments, the shaping and cutting device includes:

[0012] The feed inlet is used to feed in high-viscosity tailings filter cake;

[0013] The compaction mechanism includes a motor-driven rotating shaft and compaction blades mounted on the rotating shaft, used to compact and shape the tailings filter cake;

[0014] The extrusion and cutting device, located below the compaction mechanism, is used to extrude and initially cut the compacted tailings filter cake.

[0015] The wire cutting device, located below the extrusion cutting device, is used to further cut the initially cut tailings into regular sizes.

[0016] In some embodiments, the extrusion cutting device includes:

[0017] The downward belts are arranged in groups and rotate in pairs to form a semi-enclosed inward channel. The upper opening of the channel is large and the lower opening is small, which is used to squeeze the tailings filter cake and prevent it from sticking.

[0018] A high-pressure water jet cutting nozzle is located at the lower outlet of the downward conveyor belt and is used to initially cut the shaped tailings into blocks.

[0019] The drive unit is connected to the downward belt to drive its rotation.

[0020] In some embodiments, the wire cutting device includes:

[0021] Cutting frame, providing cutting tracks;

[0022] The cutting bow is slidably positioned within the groove of the cutting frame;

[0023] A cutting wire rope is threaded through the front end of the cutting bow and used for horizontal cutting of tailings blocks;

[0024] An electro-hydraulic actuator, connected to the cutting bow, is used to drive the extension and retraction of the cutting bow.

[0025] In some embodiments, the cement metering and conveying device further includes:

[0026] A manual maintenance gate valve is located at the discharge port of the cement silo.

[0027] A buffer hopper, connected below the manual maintenance gate valve, is used to temporarily store cement;

[0028] A compressed air supply pipe is connected to the output end of the rotary feeder to provide pneumatic conveying power.

[0029] In some embodiments, one end of the cement homogeneous air conveying pipe is connected to the junction of the rotary feeder and the compressed air supply pipe, and the other end is connected to the pneumatic composite ash spraying device of the second section homogeneous mixing preparation tank, for mixing cement powder with compressed air to form a homogeneous gas-solid mixture and conveying it.

[0030] In some embodiments, the second stage homogenizing mixing preparation tank includes:

[0031] The motor drives the stirring shaft to rotate;

[0032] The stirring blades, mounted on the stirring shaft, are used to mechanically agitate the materials.

[0033] The flow field shearing plate is evenly arranged along the circumference of the inner wall of the barrel and is staggered with the stirring blade to guide the flow field to form turbulence.

[0034] The dust collector, located at the top of the barrel, is used to treat the gas discharged from the barrel.

[0035] In some embodiments, the second stage homogenizing mixing preparation tank further includes:

[0036] The pneumatic composite spraying device is located at the bottom of the barrel and above the sand discharge pipe inlet. It includes multiple pneumatic pipes arranged tangentially for spraying the cement mixture transported by the cement homogeneous air conveying pipe into the barrel.

[0037] A flow-stabilizing grid is installed in front of the discharge port at the output end of the tank to remove air bubbles from the slurry.

[0038] The inlet of the sand discharge pipe is lower than that of the pneumatic composite ash spraying device.

[0039] In some embodiments, the device further includes a metering conveying device that is a metering belt scale whose conveying path corresponds to the output end of the shaping and cutting device, used to weigh the tailings block in real time and feed the weight back to the control system.

[0040] In some embodiments, the output end of the first pre-mixed slurry mixer is connected to a buffer tank via a pipe; the output end of the buffer tank is connected to the bottom area of ​​the second homogenized mixing preparation tank via a sand discharge pipe.

[0041] This application provides a device for feeding, metering, and preparing slurry from high-viscosity tailings. A shaping and cutting device shaped and cut the high-viscosity tailings filter cake into regular tailings blocks, solving the problem of material adhesion to the inner wall of traditional dispersing machines due to high material viscosity. Furthermore, by disrupting the material's cohesion, it provides a uniform material base for subsequent metering and slurry preparation, helping to eliminate clumping and bridging phenomena in the high-viscosity tailings. Through the segmented processing design of the tailings slurry preparation device, the first-stage pre-mixing mixer, in conjunction with the buffering function of the buffer tank, and by stabilizing the slurry concentration through cyclical mixing and continuous process integration, it facilitates the provision of concentrated slurry for homogeneous mixing. The system provides a constant-volume tailings slurry. A cement metering and conveying device uses a rotary feeder to regulate the cement delivery rate and a weighing sensor to monitor the overall weight change of the cement silo. This solves the problems of uneven feeding and metering distortion caused by cement agglomeration and static pressure within the silo in screw feeders. Furthermore, by avoiding static pressure interference, the cement feeding rate can be controlled, which helps ensure the consistency of the cement mix ratio. A homogenizing mixing device integrates airflow and mechanical stirring in the second-stage homogenizing mixing tank, solving the problem of uneven mixing caused by insufficient time or intensity of single stirring methods, thus facilitating the preparation of highly homogeneous slurry. Therefore, this application provides an integrated solution capable of accurately metering and conveying high-viscosity tailings, accurately metering and conveying cement, and efficiently homogenizing and mixing both. Attached Figure Description

[0042] Figure 1 This is a schematic diagram of the overall structure of a high-viscosity tailings feeding metering and slurry preparation device provided in the embodiments of this application;

[0043] Figure 2 This is a schematic diagram of the plastic cutting device in a high-viscosity tailings feeding, metering, and slurry preparation device provided in the embodiments of this application;

[0044] Figure 3 This is a schematic diagram of the extrusion and cutting device in a high-viscosity tailings feeding, metering, and slurry preparation device provided in the embodiments of this application;

[0045] Figure 4 This is a schematic diagram of the wire cutting device in a high-viscosity tailings feeding, metering, and slurry preparation device provided in the embodiments of this application;

[0046] Figure 5 This is a schematic diagram of the structure of the second homogenizing mixing preparation tank in a high-viscosity tailings feeding metering and slurry preparation device provided in the embodiments of this application;

[0047] Figure 6 This is a top view schematic diagram of the internal structure of the second homogenizing mixing preparation tank in a high-viscosity tailings feeding metering and slurry preparation device provided in the embodiments of this application;

[0048] Figure 7This is a schematic diagram of the arrangement of the flow field shear plate in the second stage homogeneous mixing preparation tank of a high-viscosity tailings feeding metering and slurry preparation device provided in the embodiments of this application;

[0049] Figure 8 This is a schematic diagram of the flow stabilizing grid in the second stage homogeneous mixing preparation tank of a high-viscosity tailings feeding metering and slurry preparation device provided in the embodiments of this application;

[0050] Figure 9 This is a schematic diagram of the configuration of the pneumatic composite spraying device in the second stage homogeneous mixing preparation tank of a high-viscosity tailings feeding metering and slurry preparation device provided in the embodiments of this application.

[0051] Explanation of reference numerals in the attached drawings: 1. Shaping and cutting device; 101. Feed inlet; 102. Compactor blade; 103. Compactor motor; 104. Extrusion cutting device; 10401. Downward belt; 10402. High-pressure hydraulic cutting nozzle; 10403. Drive device; 105. Wire cutting device; 10501. Electro-hydraulic actuator; 10502. Cutting wire rope; 10503. Cutting bow; 10504. Cutting frame; 2. Metering and conveying device; 3. First stage pre- 4. Pulping mixer; 5. Buffer tank; 6. Sand discharge pipe; 7. Second-stage homogenizing mixing preparation tank; 8. Dust collector; 9. Motor; 10. Discharge port; 11. Flow stabilizing grid; 2. Flow field shear plate; 12. Mixing blades; 13. Pneumatic composite dust spraying device; 4. Cement homogenizing air conveying pipe; 5. Rotary feeder; 6. Buffer hopper; 7. Manual maintenance gate valve; 8. Cement silo; 9. Weighing sensor; 10. Compressed air supply pipe. Detailed Implementation

[0052] The embodiments of the technical solution of this application will now be described in detail with reference to the accompanying drawings. These embodiments are only used to more clearly illustrate the technical solution of this application and are therefore merely examples, and should not be used to limit the scope of protection of this application.

[0053] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application pertains; the terminology used herein is for the purpose of describing particular embodiments only and is not intended to limit the application; the terms “comprising” and “having”, and any variations thereof, in the specification, claims, and foregoing description of the drawings are intended to cover non-exclusive inclusion.

[0054] In the description of the embodiments of this application, technical terms such as "first" and "second" are used only to distinguish different objects and should not be construed as indicating or implying relative importance or implicitly specifying the number, specific order, or primary and secondary relationship of the indicated technical features. In the description of the embodiments of this application, "multiple" means two or more, unless otherwise explicitly defined.

[0055] In this document, the term "embodiment" means that a particular feature, structure, or characteristic described in connection with an embodiment may be included in at least one embodiment of this application. The appearance of this phrase in various places throughout the specification does not necessarily refer to the same embodiment, nor is it a separate or alternative embodiment mutually exclusive with other embodiments. It will be explicitly and implicitly understood by those skilled in the art that the embodiments described herein can be combined with other embodiments.

[0056] In the description of the embodiments in this application, the term "and / or" is merely a description of the relationship between related objects, indicating that three relationships can exist. For example, A and / or B can represent: A existing alone, A and B existing simultaneously, and B existing alone. Additionally, the character " / " in this document generally indicates that the preceding and following related objects have an "or" relationship.

[0057] In the description of the embodiments of this application, the term "multiple" refers to two or more (including two), similarly, "multiple sets" refers to two or more (including two sets), and "multiple pieces" refers to two or more (including two pieces).

[0058] In the description of the embodiments of this application, the technical terms "center," "longitudinal," "lateral," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," "counterclockwise," "axial," "radial," and "circumferential" indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing the embodiments of this application and simplifying the description, and are not intended to indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on the embodiments of this application.

[0059] In the description of the embodiments of this application, unless otherwise expressly specified and limited, technical terms such as "installation," "connection," "joining," and "fixing" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components. For those skilled in the art, the specific meaning of the above terms in the embodiments of this application can be understood according to the specific circumstances.

[0060] To make the objectives, technical solutions, and advantages of this invention clearer, the invention will be further described in detail below with reference to embodiments. It should be understood that the specific embodiments described herein are merely illustrative and not intended to limit the invention.

[0061] To make the objectives, technical solutions, and advantages of this application clearer, the following detailed description is provided in conjunction with embodiments. It should be understood that the specific embodiments described herein are merely illustrative and not intended to limit the scope of this application.

[0062] In some implementations, refer to Figure 1 A high-viscosity tailings feeding, metering, and slurry preparation device includes: a shaping and cutting device 1, a metering and conveying device 2, a tailings slurry preparation device, a cement metering and conveying device 2, and a homogenizing and mixing device. Wherein:

[0063] The shaping and cutting device 1 is used to shape and cut high-viscosity tailings filter cake into regular tailings blocks. Specifically, the shaping and cutting device 1 is located at the front end of the system and is a pretreatment unit for the high-viscosity tailings filter cake. Its function is to crush and cut large, irregular high-viscosity tailings filter cake into uniformly sized regular tailings blocks, reducing adhesion and bridging between tailings blocks, and providing a uniform material base for subsequent metering and mixing. Furthermore, it facilitates subsequent metering and slurry processing. For example, the shaping and cutting device 1 includes a feed hopper, an extrusion and shaping mechanism, and a multi-stage cutting assembly. The feed hopper adopts an inclined design, and the inner wall is coated with a wear-resistant and anti-stick coating. For example, the wear-resistant and anti-stick coating includes a polytetrafluoroethylene coating to prevent the tailings filter cake from sticking and clogging. The extrusion and shaping mechanism consists of a pair of opposing and rotating extrusion rollers with raised ridges on the roller surface. The loose filter cake is compacted into a sheet-like structure with uniform thickness by the pressure between the rollers. The thickness of the sheet-like structure can be adjusted by changing the roller spacing. For example, the roller spacing is 5 cm, and the corresponding thickness of the sheet-like filter cake is 5 cm. The multi-stage cutting assembly is located below the extrusion rollers and includes a transverse cutting blade group and a longitudinal cutting blade group. The transverse blade group cuts the sheet-like filter cake into strips, and the longitudinal blade group further cuts the strips into cubic or cuboid tailings blocks, thereby coordinating the cutting of the high-viscosity tailings filter cake into regular blocks, destroying its cohesion, which is beneficial for subsequent transportation and dispersing work, and further beneficial for the uniform contact of the high-viscosity tailings filter cake with cement and water, which is ultimately beneficial for slurry mixing.

[0064] The metering and conveying device 2, connected to the output end of the shaping and cutting device 1, is used to meter and convey tailings blocks. Specifically, the metering and conveying device 2 is a mechanical structure used to accurately meter regular tailings blocks and convey them to the tailings slurry preparation device. Its purpose is to achieve both weighing and transporting the cut regular tailings blocks, thereby configuring the slurry ratio. In other words, the structural form of the metering and conveying device 2 is not unique; it includes various structures that can achieve the effects of this basic technology. For example, the metering and conveying device 2 mainly consists of a conveying mechanism, a metering sensor, and a control system. The conveying mechanism adopts a scraper conveyor or a belt conveyor, with anti-slip ridges on the belt surface to prevent tailings blocks from slipping. The metering function is achieved in two ways: first, a weighing section is set in the middle of the conveyor, and a high-precision weighing sensor 1101 is installed at the bottom to monitor the cumulative weight of the tailings blocks in real time during the conveying process; second, the operating speed of the conveyor is monitored by an encoder, and combined with the preset average size of the tailings blocks in the shaping and cutting device 1, the conveying volume per unit time is calculated, thereby achieving dual metering calibration of weight and volume. After the regular tailings block falls from the shaping and cutting device 1 into the conveying mechanism, the control system controls the conveying volume by adjusting the conveyor speed according to the preset tailings ratio parameters. At the same time, the weighing sensor 1101 provides real-time feedback on the actual conveying volume, realizing the weighing and conveying function of high-viscosity tailings filter cake. Through the mutual coordinated control of the two parameters, the accuracy of tailings feeding is improved, which is conducive to the formation of high-quality tailings slurry.

[0065] The tailings slurry preparation device includes a first-stage pre-mixing mixer 3 and a buffer tank 4. The first-stage pre-mixing mixer 3 receives tailings blocks conveyed by the metering and conveying device 2 and adds thickening water. The buffer tank 4 receives the tailings slurry output from the first-stage pre-mixing mixer 3. Specifically, the first-stage pre-mixing mixer 3 is a periodic forced mixing device that receives tailings blocks conveyed by the metering and conveying device 2 and adds thickening water to the tailings blocks. Its main purpose is to mix the tailings blocks with water to prepare tailings slurry with a stable concentration, thereby solving the problem of difficulty in subsequent homogenization caused by fluctuations in tailings slurry concentration. For example, the first-stage pre-mixed slurry mixer 3 is a horizontal or vertical mixing device. Its top is equipped with a tailings block inlet 101, which connects to the output of the metering and conveying device 2. Simultaneously, the top of the first-stage pre-mixed slurry mixer 3 also has a thickening water inlet, equipped with a double-layered mixing paddle for further dispersing the regular tailings blocks and ensuring thorough mixing with water. The thickening water is evenly injected through a pipeline from the top distribution tank of the mixer. An electromagnetic flow meter and regulating valve are installed on the pipeline to adjust the water addition based on the moisture content of the tailings blocks and the target slurry concentration. Specifically, the buffer tank 4 receives the tailings slurry output from the first-stage pre-mixed slurry mixer 3. It is a buffer container whose main purpose is to temporarily store the prepared tailings slurry for continuous supply, balancing the flow differences between preceding and following processes, and resolving the connection issue between periodic mixing and continuous processes.

[0066] A cement metering and conveying device includes a cement silo 11, a rotary feeder 8, and a weighing sensor 1101. The weighing sensor 1101 is used to monitor the weight change of the material in the cement silo 11 to measure the cement feed rate, and the rotary feeder 8 is used to control the cement conveying rate. Specifically, the cement metering and conveying device is used to accurately measure and convey cement powder according to a preset ratio to a homogenizing mixing device for co-mixing with tailings slurry. Its purpose is to achieve real-time monitoring and control of the cement feed rate. For example, the cement metering and conveying device includes a cement silo 11, a rotary feeder 8, a weighing sensor 1101, and a conveying pipeline. The cement silo 11 is a closed storage silo with a bag filter at the top, a conical bottom structure, and a vibrator installed on the outer wall. The rotary feeder 8 is installed at the cement outlet at the bottom of the cement silo 11, and the cement conveying rate is adjusted by the speed of a motor 602. The weighing sensor 1101 is installed on the support legs of the cement silo 11 to monitor the weight change of the cement in the silo in real time.

[0067] The homogenizing mixing device includes a second-stage homogenizing mixing preparation tank 6. This tank 6 receives tailings slurry from the buffer tank 4 via a sand discharge pipe 5 and receives cement powder from a cement metering and conveying device via a cement homogenizing gas transmission pipe 7. This process is used to mix the tailings slurry and cement powder to prepare a homogenized slurry. Specifically, the homogenizing mixing device is the final mixing unit of the system. It utilizes a combination of airflow mechanical stirring and gas collision in the cement homogenizing gas transmission pipe 7 to thoroughly mix the tailings slurry and cement powder, preparing a slurry with homogeneity that meets the filling requirements. For example, the second-stage homogenizing mixing tank 6 is a vertical mixing tank with a tailings mortar inlet at the top. This tailings mortar inlet is connected to the buffer tank 4 via a sand discharge pipe 5, and a screw pump is installed on the pipeline to control the feed rate. The second-stage homogenizing mixing tank 6 also has a cement inlet, which is connected to a rotary feeder 8 via a cement homogenizing air conveying pipe 7. Compressed air is introduced into the air pipe to fluidize and transport the cement. The tank has three layers of mixing components. The bottom mixing component is an anchor-type mixing paddle that drives the overall circulation of materials in the tank. The middle mixing component is a turbine-type mixing paddle that uses radial shear force to promote the mixing of cement and mortar. The top mixing component is a defoaming paddle used to eliminate air bubbles generated during the mixing process. In addition, an online concentration meter and a homogenization detector are installed on the side wall of the tank to monitor the slurry state in real time.

[0068] This application uses a shaping and cutting device 1 to shape and cut high-viscosity tailings filter cake into regular tailings blocks, solving the problem of material adhesion to the inner wall of traditional dispersing machines due to high material viscosity. Furthermore, by disrupting the material's cohesion, it provides a uniform material base for subsequent metering and slurry preparation, which helps eliminate agglomeration and bridging of high-viscosity tailings. Through the segmented processing design of the tailings slurry preparation device, the first-stage pre-mixing mixer 3, in conjunction with the buffering function of the buffer tank 4, and by stabilizing the slurry concentration through cyclical mixing and continuous process integration, it helps provide tailings slurry with a constant concentration for homogeneous mixing. Through cement metering... The conveying device uses a rotary feeder 8 to regulate the cement conveying rate and a weighing sensor 1101 to monitor the overall weight change of the cement silo 11. This solves the problems of poor material feeding and metering distortion caused by cement caking and static pressure in the silo by the screw feeder. Furthermore, by avoiding static pressure interference, the cement feeding rate can be controlled, which helps ensure the consistency of the cement mix ratio. The homogenizing mixing device integrates airflow and mechanical stirring in the second-stage homogenizing mixing tank 6, which solves the problem of uneven mixing caused by insufficient time or intensity of single stirring methods, and helps to achieve high homogeneity of slurry preparation. Therefore, this application provides an integrated solution that can achieve accurate metering and conveying of high-viscosity tailings, accurate metering and conveying of cement, and efficient homogenizing and mixing of the two.

[0069] In some implementations, refer to Figure 2 The shaping and cutting device 1 includes: a feed inlet 101, a compaction mechanism, an extrusion cutting device 104, and a wire cutting device 105, wherein:

[0070] The feed inlet 101 is used to input high-viscosity tailings filter cake. Specifically, the purpose of the feed inlet 101 is to receive the raw material and guide it into the subsequent processing stage. Therefore, its setting position is related to the feeding position of the high-viscosity tailings filter cake. For example, the feed inlet is set at the top of the shaping and cutting device 1, and its lower outlet is connected to the inlet of the compaction mechanism. The high-viscosity tailings filter cake is guided by gravity to be directionally conveyed into the compaction mechanism.

[0071] The compaction mechanism includes a rotating shaft driven by a motor 602 and compaction blades 102 mounted on the rotating shaft, used to compact and shape the tailings filter cake. Specifically, the compaction mechanism consists of a rotating shaft driven by a motor 602 and compaction blades 102 fixed on the shaft. The motor 602 drives the rotating shaft to rotate the compaction blades 102 at high speed. When the blades come into contact with the tailings, the loose structure of the filter cake is broken by the combined action of shear force and normal pressure, thereby applying continuous extrusion force to the loosely bonded tailings filter cake to eliminate internal voids and increase density, achieving preliminary treatment and regularization of the material form, thus solving the problem of poor flowability caused by the strong cohesion of high-viscosity tailings. For example, the rotating shaft is driven by a variable frequency reduction motor 602, which can realize stepless speed adjustment. The compaction blades 102 are spirally distributed on the rotating shaft, and a gap is left between the edge of the blades and the inner wall of the cylinder of the compaction mechanism to facilitate the unobstructed passage of the tailings filter cake.

[0072] The extrusion cutting device 104, located below the compaction mechanism, is used to extrude and preliminarily cut the compacted tailings filter cake. Specifically, the extrusion cutting device 104 is located below the compaction mechanism, and its purpose is to force the compacted tailings filter cake to be extruded and formed into strips with a fixed cross-section through a geometrically constrained channel. At the same time, it uses a cutting edge to complete the preliminary segmentation work. The extrusion cutting device 104 restricts the lateral flow of tailings through mechanical constraints, forcing it to pass through a mold of a specific shape under axial pressure, thereby further processing the preliminarily processed and compacted tailings filter cake into regular strips or sheets to facilitate subsequent processing. For example, the extrusion cutting device 104 consists of a fixed template and a movable extrusion head. The fixed template has multiple evenly distributed forming holes, the shape of which can be set to circular, square, or rhomboid as required. The movable extrusion head is driven by a hydraulic cylinder and can reciprocate along the axial direction of the fixed template. Its movement speed and stroke can be adjusted by a hydraulic control system. When the compacted tailings filter cake enters the extrusion and cutting device 104, the movable extrusion head moves forward and extrudes the tailings filter cake through the forming holes on the fixed template to form strip-shaped tailings with a fixed cross-sectional shape.

[0073] The wire cutting device 105, located below the extrusion cutting device 104, is used to further cut the initially cut tailings blocks into regular sizes. Specifically, the wire cutting device 105 is located downstream of the extrusion cutting device 104, and its purpose is to cut the strip-shaped tailings blocks into uniformly sized cubic or cuboid units. The wire cutting device 105 applies cutting force to the tailings strips through a high-speed moving cutting wire, thereby achieving the segmentation of the secondary-processed tailings filter cake, forming uniformly sized cubic or cuboid units. This facilitates the subsequent metering and conveying work in the metering and conveying device 2, and also facilitates the initial mixing work in the first-stage pre-mixing mixer 3. The regular small-volume units reduce the mixing difficulty caused by the high viscosity characteristics during mixing, and further solve the metering error problem caused by tailings adhesion in traditional belt conveying and the problem of insufficient mixing in large-volume, high-viscosity tailings filter cakes. For example, the wire cutting device 105 includes multiple sets of parallel cutting wires, with both ends of the cutting wires connected to an adjustable tensioning mechanism to ensure that the cutting wires always maintain appropriate tension. Multiple sets of cutting lines are arranged in layers along the horizontal direction. The drive system of the wire cutting device 105 adopts a servo motor 602, which drives the cutting line to perform high-speed reciprocating motion through a synchronous belt. After the tailings block after initial cutting falls from the extrusion cutting device 104 into the wire cutting device 105, the high-speed moving cutting line will further cut the tailings block into smaller, uniformly sized block or strip units.

[0074] In some implementations, refer to Figure 3 The extrusion cutting device 104 includes: a downward belt 10401, a high-pressure water jet cutting nozzle 10402, and a drive device 10403, wherein:

[0075] The downward belts 10401 are arranged in groups and rotate in pairs to form a semi-enclosed inner channel. The upper opening of the channel is large and the lower opening is small. This channel is used to compress the tailings filter cake and prevent adhesion. Specifically, the downward belts 10401 form a semi-enclosed inner channel by rotating in pairs. The channel is designed with a tapered structure with a large upper opening and a small lower opening. This applies continuous compression to the compacted tailings filter cake and forces it to form a continuous sheet-like body through the geometric constraint space. This corrects the shape of the high-viscosity tailings filter cake, which has been compacted from the compaction mechanism but has an irregular shape, so as to facilitate subsequent processing.

[0076] The high-pressure hydraulic cutting nozzle 10402 is located at the lower outlet of the downward belt 10401 and is used to initially cut the shaped tailings into blocks. Specifically, the high-pressure hydraulic cutting nozzle 10402 is located at the lower outlet of the downward belt 10401 and performs initial cutting on the shaped sheet tailings, thereby initially dividing them into smaller units.

[0077] The drive unit 10403 is connected to the downward belt 10401 to drive its rotation.

[0078] In some implementations, refer to Figure 4 The wire cutting device 105 includes: a cutting frame 10504, a cutting bow 10503, a cutting wire rope 10502, and an electro-hydraulic actuator 10501, wherein:

[0079] The cutting frame 10504 provides a cutting track; specifically, the cutting frame 10504 is a rigid truss structure, the purpose of which is to provide stable support for the cutting track, provide a guiding reference for dynamic cutting actions, and allow the cutting bow 10503 to slide within it.

[0080] The cutting bow 10503 is slidably disposed in the groove of the cutting frame 10504; specifically, the cutting bow 10503 is a sliding frame structure used to install the cutting wire rope 10502. Its purpose is to provide an installation position for the cutting wire rope 10502 and drive the cutting wire rope 10502 to generate directional movement under the linear driving force of the electro-hydraulic actuator 10501, thereby realizing the cutting function.

[0081] The cutting wire rope 10502 is threaded through the front end of the cutting bow 10503 and is used for horizontal cutting of tailings blocks. Specifically, the cutting wire rope 10502 is a tensile and wear-resistant metal wire or thread that is threaded through the front end of the cutting bow 10503 and is taut by the tension of the cutting bow 10503. Its purpose is to finely cut the sheet-like high-viscosity tailings discharged from the extrusion cutting device 104 through its own high-speed reciprocating motion.

[0082] The electro-hydraulic actuator 10501 is connected to the cutting bow 10503 and is used to drive the cutting bow 10503 to extend and retract.

[0083] In this embodiment, the tailings block initially segmented by the high-pressure hydraulic cutting nozzle 10402 falls onto the positioning platform of the cutting frame 10504. The electro-hydraulic push rod 10501 drives the cutting bow 10503 to slide horizontally along the frame channel, causing the cutting wire rope 10502 to pass through the cross section of the tailings block with constant tension, thereby achieving a secondary precise cut of the tailings block. This not only avoids the problem of blade sticking that may occur in the cutting of highly viscous tailings, but also improves the geometric regularity and metering stability of the tailings block.

[0084] In some implementations, refer to Figure 1 The cement metering and conveying device also includes: a manual maintenance gate valve 10, a buffer hopper 9, and a compressed air supply pipe 12, wherein:

[0085] The manual maintenance gate valve 10 is located at the discharge port of the cement silo 11. Specifically, the purpose of setting up the manual maintenance gate valve 10 is to achieve physical isolation and sealing of the cement silo 11 during equipment maintenance, thereby ensuring operational safety.

[0086] The buffer hopper 9 is connected below the manual inspection gate valve 10 and is used to temporarily store cement. Specifically, the purpose of setting up the buffer hopper 9 is to temporarily store cement by expanding the volume and eliminating the impact force of material feeding, so as to provide stable and continuous feeding conditions for the rotary feeder 8.

[0087] Compressed air supply pipe 12 is connected to the output end of rotary feeder 8 to provide pneumatic conveying power. Specifically, compressed air supply pipe 12 is connected to the output end of rotary feeder 8 to provide pneumatic conveying power for cement powder, thereby achieving high-speed and efficient conveying of cement powder.

[0088] In some implementations, refer to Figure 1 and Figure 5 One end of the cement homogenizing air conveying pipe 7 is connected to the junction of the rotary feeder 8 and the compressed air supply pipe 12, and the other end is connected to the pneumatic composite spraying device 607 of the second-stage homogenizing mixing preparation tank 6. This device mixes cement powder with compressed air to form a homogenous gas-solid mixture and conveys it. Specifically, one end of the cement homogenizing air conveying pipe 7 is connected to the junction of the rotary feeder 8 and the compressed air supply pipe 12, thereby mixing cement powder with compressed air and achieving efficient conveying of the cement powder under the pressure provided by the compressed air. The other end is connected to the pneumatic composite spraying device 607 of the second-stage homogenizing mixing preparation tank 6. Its core function is to spray the homogenous mixture of compressed air and cement powder into the tailings mortar. The high-speed gas agitation causes the cement powder to diffuse homogeneously, improving the uniformity of mixing with the tailings mortar and thus avoiding the uneven mixing caused by cement agglomeration in traditional mechanical mixing.

[0089] In some implementations, refer to Figure 5 The second-stage homogenizing mixing preparation tank 6 includes: a motor 602, stirring blades 606, a flow field shearing plate 605, and a dust collector 601, wherein:

[0090] Motor 602 drives the stirring shaft to rotate; specifically, the purpose of motor 602 is to provide power to the output shaft of stirring blade 606, so its setting position depends on the specific needs of stirring blade 606. For example, motor 602 is set at the top of the second homogenizing mixing preparation tank 6.

[0091] The stirring blades 606, mounted on the stirring shaft, are used to mechanically agitate the materials; for details, refer to... Figure 5 and Figure 6The stirring blades 606 are fixed on the stirring shaft. Their purpose is to apply mechanical shear force to the mixture of tailings mortar and cement powder to break up agglomerates, thereby achieving mixing of the two.

[0092] The flow field shearing plates 605 are evenly arranged along the circumference of the inner wall of the barrel, and are staggered with the stirring blades 606 to guide the flow field to form turbulence; for details, refer to Figure 5 and Figure 7 The flow field shearing plates 605 are evenly arranged along the circumference of the inner wall of the barrel and are staggered with the stirring blades 606, which guides the flow field inside the barrel to form a high-intensity turbulent zone, thereby accelerating the dispersion of cement particles and further accelerating the mixing between tailings mortar and cement.

[0093] Dust collector 601, located at the top of the barrel, is used to treat the gas discharged from the barrel. Specifically, dust collector 601 is located at the exhaust port at the top of the barrel to treat the dust-laden gas escaping during the mixing process, capture cement particles in it, and thus solve the dust pollution problem caused by high-pressure gas transportation in the powder mixing process.

[0094] In some implementations, refer to Figure 5 , Figure 8 as well as Figure 9 The second-stage homogenizing mixing preparation tank 6 also includes: a pneumatic composite spraying device 607 and a flow-stabilizing grid 604, wherein:

[0095] The pneumatic composite spraying device 607 is located at the bottom of the barrel and above the inlet of the sand discharge pipe 5. It includes multiple pneumatic pipes arranged tangentially for spraying the cement mixture conveyed by the cement homogenizing air conveying pipe 7 into the barrel. Specifically, the pneumatic composite spraying device 607 is located at the bottom of the barrel and above the inlet of the sand discharge pipe 5. Its purpose is to spray the homogenized mixture of cement powder and compressed air conveyed by the cement homogenizing air conveying pipe 7 into the barrel in the form of a high-speed tangential jet. This generates a rotating airflow inside the second homogenized mixing preparation barrel 6, which makes the cement powder evenly dispersed in the tailings mortar and avoids the problem of local enrichment of slurry caused by cement agglomeration.

[0096] A flow-stabilizing grid 604 is installed in front of the discharge port 603 at the output end of the tank to remove air bubbles from the slurry. Specifically, the flow-stabilizing grid 604 is installed in front of the discharge port 603 at the output end of the tank. Through its porous barrier structure, it removes entrained air bubbles from the slurry, thereby avoiding slurry density fluctuations caused by the coexistence of gas and liquid phases during mixing, which helps to improve the uniformity of the slurry.

[0097] The inlet position of the sand discharge pipe 5 is lower than that of the pneumatic composite spraying device 607. Specifically, in this embodiment, the sand discharge pipe 5 is connected to the bottom area of ​​the second homogeneous mixing preparation tank 6, and the position of the sand discharge pipe 5 is lower than that of the pneumatic composite spraying device 607. The purpose is to prevent gas from entering the sand discharge pipe 5 and affecting the mortar delivery.

[0098] In some implementations, refer to Figure 1 The metering conveying device 2 is a metering belt scale, whose conveying path corresponds to the output end of the shaping and cutting device 1. It is used to weigh the tailings blocks in real time and feed the weight back to the control system. Specifically, its purpose is to achieve continuous dynamic metering of the tailings block weight during the conveying process.

[0099] In some implementations, refer to Figure 1 and Figure 5 The output of the first-stage pre-mixed slurry mixer 3 is connected to the buffer tank 4 via a pipe; the output of the buffer tank 4 is connected to the bottom area of ​​the second-stage homogenized mixing preparation tank 6 via a sand discharge pipe 5. Specifically, the buffer tank 4 expands its volume to temporarily store tailings slurry, providing buffer space, and utilizes the weight of the tailings slurry to provide the power for conveying slurry to the second-stage homogenized mixing preparation tank 6 through the principle of communicating vessels. At the same time, it can also prevent the gas in the pneumatic composite spraying device 607 from backflowing into the sand discharge pipe 5, which would reduce the transportation efficiency.

[0100] The above description is merely a specific embodiment of the present invention, but the scope of protection of the present invention is not limited thereto. Any modifications, equivalent substitutions, and improvements made by those skilled in the art within the scope of the technology disclosed in the present invention, and within the spirit and principles of the present invention, should be covered within the scope of protection of the present invention.

[0101] It should be noted that this application is not limited to the above-described embodiments. The above embodiments are merely examples, and any embodiments with the same structure and effect as the technical concept within the scope of this application are included in the technical scope of this application. Furthermore, various modifications that can be conceived by those skilled in the art to the embodiments, and other ways of constructing by combining some of the constituent elements of the embodiments, without departing from the spirit of this application, are also included in the scope of this application.

Claims

1. A device for feeding, metering, and preparing slurry from high-viscosity tailings, characterized in that, include: A shaping and cutting device (1) is used to shape and cut high-viscosity tailings filter cake into regular tailings blocks; The metering and conveying device (2) is connected to the output end of the shaping and cutting device (1) and is used to meter and convey the tailings blocks; The tailings preparation device includes a first-stage pre-mixing mixer (3) and a buffer tank (4). The first-stage pre-mixing mixer (3) receives the tailings blocks conveyed by the metering and conveying device (2) and adds thickening water. The buffer tank (4) receives the tailings output by the first-stage pre-mixing mixer (3). The cement metering and conveying device includes a cement silo (11), a rotary feeder (8) and a weighing sensor (1101). The weighing sensor (1101) is used to monitor the change in the weight of the material in the cement silo (11) to measure the cement feed amount. The rotary feeder (8) is used to control the cement conveying rate. The homogenizing mixing device includes a second homogenizing mixing preparation tank (6), which receives tailings slurry from the buffer tank (4) through a sand discharge pipe (5) and receives cement powder from the cement metering and conveying device through a cement homogenizing gas transmission pipe (7), and is used to mix the tailings slurry and cement powder to prepare homogenized slurry. The cement metering and conveying device also includes: The manual maintenance gate valve (10) is located at the discharge port of the cement silo (11); A buffer hopper (9) is connected below the manual maintenance gate valve (10) and is used to temporarily store cement. A compressed air supply pipe (12) is connected to the output end of the rotary feeder (8) to provide pneumatic conveying power; One end of the cement homogeneous air conveying pipe (7) is connected to the junction of the rotary feeder (8) and the compressed air supply pipe (12), and the other end is connected to the pneumatic composite ash spraying device (607) of the second section homogeneous mixing preparation tank (6), which is used to mix cement powder with compressed air to form a homogeneous gas-solid mixture and convey it. The second stage homogenizing mixing preparation tank (6) includes: The motor (602) drives the stirring shaft to rotate; The stirring blades (606) are mounted on the stirring shaft and are used to mechanically agitate the material. The flow field shear plate (605) is evenly arranged along the circumference of the inner wall of the barrel and is staggered with the stirring blade (606) to guide the flow field to form turbulence; A dust collector (601) is located on the upper part of the barrel and is used to treat the gas discharged from the barrel. The second homogenizing mixing preparation tank (6) also includes: The pneumatic composite ash spraying device (607) is located at the bottom of the barrel and above the inlet of the sand discharge pipe (5), and includes multiple pneumatic pipes arranged tangentially for spraying the cement mixture transported by the cement homogeneous air transport pipe (7) into the barrel. A flow-stabilizing grid (604) is installed in front of the discharge port (603) at the output end of the barrel to remove air bubbles from the slurry; The inlet position of the sand discharge pipe (5) is lower than that of the pneumatic composite ash spraying device (607).

2. The high-viscosity tailings feeding metering and slurry preparation device according to claim 1, characterized in that, The shaping and cutting device (1) includes: The feed inlet (101) is used to feed in high-viscosity tailings filter cake; The compaction mechanism includes a rotating shaft driven by a compaction motor (103) and compaction blades (102) disposed on the rotating shaft, used to compact and shape the tailings filter cake; The extrusion and cutting device (104) is located below the compaction mechanism and is used to extrude and initially cut the compacted tailings filter cake. The wire cutting device (105), located below the extrusion cutting device (104), is used to further cut the initially cut tailings into regular sizes.

3. The high-viscosity tailings feeding metering and slurry preparation device according to claim 2, characterized in that, The extrusion cutting device (104) includes: The downward belts (10401) are arranged in groups and rotate in pairs to form a semi-enclosed inward channel. The upper opening of the channel is large and the lower opening is small, which is used to squeeze the tailings filter cake and prevent it from sticking. A high-pressure hydraulic cutting nozzle (10402) is located at the lower outlet of the downward belt (10401) and is used to initially cut the shaped tailings into blocks. The drive unit (10403) is connected to the downward belt (10401) to drive its rotation.

4. The high-viscosity tailings feeding metering and slurry preparation device according to claim 2, characterized in that, The wire cutting device (105) includes: Cutting frame (10504), providing cutting rails; The cutting bow (10503) is slidably disposed in the groove of the cutting frame (10504); The cutting wire rope (10502) is threaded through the front end of the cutting bow (10503) and used for horizontal cutting of tailings blocks; An electro-hydraulic actuator (10501) is connected to a cutting bow (10503) and is used to drive the cutting bow (10503) to extend and retract.

5. The high-viscosity tailings feeding metering and slurry preparation device according to claim 1, characterized in that, Also includes: The metering conveying device (2) is a metering belt scale, whose conveying path corresponds to the output end of the plastic cutting device (1), and is used to weigh the tailings block weight in real time and feed it back to the control system.

6. The high-viscosity tailings feeding metering and slurry preparation device according to claim 1, characterized in that, The output end of the first pre-mixed slurry mixer (3) is connected to the buffer tank (4) through a pipe; the output end of the buffer tank (4) is connected to the bottom area of ​​the second homogenized mixing preparation tank (6) through a sand discharge pipe (5).

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