High-viscosity tailing feeding metering and slurry preparing device

Abstract

The invention provides a high-viscosity tailing feeding metering and slurry preparing device, and belongs to the technical field of material mixing, the high-viscosity tailing feeding metering and slurry preparing device comprises a shaping cutting device, a metering conveying device, a tailing slurry preparing device, a cement dosage conveying device and a homogenizing mixing device.A high-viscosity tailing filter cake is shaped and cut into regular tailing blocks through the shaping cutting device; the problem that the materials are adhered to the inner wall of the equipment due to high viscosity of the materials in the traditional beater is solved, so that a uniform material foundation is provided for subsequent metering and slurrying by destroying the cohesion of the materials; and airflow mechanical stirring is fused in the second-section homogenizing and mixing preparation barrel through the homogenizing and mixing device, so that the problem of non-uniform mixing caused by insufficient time or insufficient strength in a single stirring mode is solved, and high-homogeneity preparation of the slurry is favorably realized. Therefore, the invention provides an integrated scheme capable of realizing accurate metering and conveying of the high-viscosity tailings, accurate metering and conveying of the cement and efficient homogeneous mixing of the high-viscosity tailings and the cement.

Description

Technical Field

[0001] The invention belongs to the technical field of material mixing, and in particular relates to a high-viscosity tailings feeding metering and slurry preparation device. Background Art

[0002] In the existing technology, high-viscosity tailings filter cake is easy to stick to the inner wall of the equipment due to its high viscosity and easy to clump. When processed by traditional dispersers, it is easy to adhere to the inner wall of the equipment, and it is impossible to achieve effective dispersion and accurate measurement, resulting in unstable tailings feeding; cement feeding often relies on screw feeders, which are prone to blockage due to agglomeration, resulting in poor feeding, and the measurement accuracy is greatly affected by the static pressure in the bin, making it difficult to ensure feeding accuracy; at the same time, the mixing of tailings slurry and cement powder mostly relies on a single stirring method, which either causes uneven mixing due to insufficient stirring time or stirring intensity, or is difficult to meet large production capacity requirements due to complex equipment and high energy consumption.

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

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

[0005] The present invention is achieved by a device for metering high-viscosity tailings feed and preparing slurry, comprising: Shaping and cutting device, used to shape and cut the highly viscous tailings filter cake into regular tailings blocks; A metering and conveying device, connected to the output end of the shaping and cutting device, for metering and conveying the tailings blocks; The tailings slurry preparation device includes a first-stage pre-pulping mixer and a buffer box, wherein the first-stage pre-pulping mixer receives the tailings blocks conveyed by the metering and conveying device and adds concentrated water, and the buffer box receives the tailings slurry output by the first-stage pre-pulping mixer; A cement metering and conveying device, comprising a cement silo, a rotary feeder, and a weighing sensor, wherein the weighing sensor is used to monitor the weight change of the material in the cement silo to measure the cement feeding amount, and the rotary feeder is used to control the cement conveying rate; The homogeneous mixing device includes a second-stage homogeneous mixing preparation barrel, which receives tailings slurry from the buffer box through a sand discharge pipe and receives cement powder delivered by a cement metering and conveying device through a cement homogeneous gas pipeline, and is used to mix the tailings slurry with cement powder to prepare homogeneous slurry.

[0006] In some embodiments, the shaping and cutting device comprises: Feed port, used to input highly viscous tailings filter cake; The compaction mechanism includes a rotating shaft driven by a motor and compaction blades provided on the rotating shaft, and is used to compact and shape the tailings filter cake; The extrusion and cutting device is located below the compaction mechanism and is used to extrude and initially cut the compacted tailings filter cake; The wire cutting device is located below the extrusion cutting device and is used to further cut the tailings blocks after preliminary cutting into regular sizes.

[0007] In some embodiments, the extrusion cutting device comprises: The downward belts are arranged in groups and rotate relative to each other in pairs to form a semi-enclosed inward channel, and 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 adhesion; A high-pressure hydraulic cutting nozzle is provided at the lower outlet of the downward belt and is used to initially cut the formed tailings into blocks; A driving device is connected to the downward belt to drive it to rotate.

[0008] In some embodiments, the wire cutting device comprises: Cutting frame, providing cutting track; A cutting bow slidably disposed in a slot of the cutting frame; The cutting wire rope is installed at the front end of the cutting bow and is used to horizontally cut the tailings blocks; The electro-hydraulic push rod is connected to the cutting bow and is used to drive the cutting bow to move in an extension and contraction manner.

[0009] In some embodiments, the cement metering and conveying device further comprises: A manual inspection gate valve is provided at the discharge port of the cement silo; A buffer hopper is connected below the manual inspection gate valve and is used for temporarily storing cement; A compressed air supply pipe is connected to the output end of the rotary feeder and is used to provide pneumatic conveying power.

[0010] In some embodiments, one end of the cement homogeneous gas transmission 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-stage homogeneous mixing preparation barrel, which is used to mix cement powder with compressed air to form a homogeneous gas-solid mixture and transport it.

[0011] In some embodiments, the second stage homogeneous mixing preparation tank includes: Motor, driving the stirring shaft to rotate; The stirring blade is provided on the stirring shaft and is used to mechanically disturb the material; The flow field shear plates are evenly arranged along the circumference of the inner wall of the barrel and staggered with the stirring blades to guide the flow field to form turbulence; The dust collector is located on the upper part of the barrel and is used to process the gas discharged from the barrel.

[0012] In some embodiments, the second-stage homogeneous mixing preparation tank further includes: The pneumatic composite ash spraying device is located at the bottom of the barrel and above the sand discharge pipe inlet. It includes multiple pneumatic pipes arranged along the tangential direction and is used to spray the cement mixture transported by the cement homogenizing gas pipeline into the barrel. The flow stabilizing grid is located in front of the discharge port at the output end of the barrel to remove bubbles in the slurry; The inlet position of the sand discharge pipe is lower than the pneumatic composite dust spraying device.

[0013] In some embodiments, the metering and conveying device is further comprised of a metering belt scale, the conveying path of which corresponds to the output end of the shaping and cutting device, and is used to weigh the tailings blocks in real time and feed back the weight to the control system.

[0014] In some embodiments, the output end of the first-stage pre-pulping mixer is connected to a buffer box via a pipeline; the output end of the buffer box is connected to the bottom area of ​​the second-stage homogeneous mixing preparation barrel via a sand discharge pipe.

[0015] The present application provides a high-viscosity tailings feeding metering and slurry preparation device, which shapes and cuts the high-viscosity tailings filter cake into regular tailings blocks through a shaping and cutting device, solving the problem of adhesion to the inner wall of the equipment caused by the high viscosity of the material in the traditional disintegrator, and then provides a uniform material basis for subsequent metering and slurrying by destroying the cohesion of the material, which is conducive to eliminating the agglomeration and bridging of high-viscosity tailings. Through the segmented processing design of the tailings slurry preparation device, the first-stage pre-slurry mixer cooperates with the buffering function of the cache box, and stabilizes the mortar concentration by balancing the periodic stirring and the connection of the continuous process, which is conducive to providing concentrated material for homogeneous mixing. Tailings slurry with constant density; the cement metering and conveying device uses a rotary feeder to adjust the cement delivery amount, and uses a weighing sensor to monitor the overall weight change of the cement silo, which solves the problems of poor material feeding and metering distortion caused by cement agglomeration and static pressure in the silo of the screw feeder, and then realizes the regulation of cement feeding rate by avoiding static pressure interference, which is conducive to ensuring the consistency of cement ratio; the homogeneous mixing device uses the fusion air flow mechanical stirring in the second-stage homogeneous mixing preparation barrel to solve the problem of uneven mixing caused by insufficient time or intensity of a single stirring method, which is conducive to the preparation of slurry with high homogeneity. Therefore, the present application provides an integrated solution that can achieve precise metering and conveying of high-viscosity tailings, precise metering and conveying of cement, and efficient homogeneous mixing of the two. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 Schematic diagram of the overall structure of a high-viscosity tailings feeding metering and slurry preparation device provided in an embodiment of the present application; Figure 2 Schematic diagram of the structure of a shaping and cutting device in a high-viscosity tailings feeding metering and slurry preparation device provided in an embodiment of the present application; Figure 3 This is a schematic structural diagram of an extrusion and cutting device in a high-viscosity tailings feeding metering and slurry preparation device provided in an embodiment of the present application; Figure 4 This is a schematic structural diagram of a wire cutting device in a high-viscosity tailings feeding metering and slurry preparation device provided in an embodiment of the present application; Figure 5 This is a schematic structural diagram of the second-stage homogeneous mixing preparation barrel in a high-viscosity tailings feeding metering and slurry preparation device provided in an embodiment of the present application; Figure 6 This is a top view schematically showing the internal structure of the second-stage homogeneous mixing preparation barrel in a high-viscosity tailings feeding metering and slurry preparation device provided in an embodiment of the present application; Figure 7 This is a schematic diagram of the arrangement of the shear plates in the flow field of the second-stage homogeneous mixing preparation barrel in a high-viscosity tailings feeding metering and slurry preparation device provided in an embodiment of the present application; Figure 8 This is a schematic diagram of a flow stabilizing grid in the second stage of a homogeneous mixing preparation barrel in a high-viscosity tailings feeding metering and slurry preparation device provided in an embodiment of the present application; Figure 9 It is a schematic diagram of the arrangement of a pneumatic composite ash spraying device in the second stage homogeneous mixing preparation barrel in a high-viscosity tailings feeding metering and slurry preparation device provided in an embodiment of the present application.

[0017] Explanation of reference numerals: 1. Shaping and cutting device; 101. Feeding port; 102. Compacting blade; 103. Compacting motor; 104. Extrusion and cutting device; 10401. Downward belt; 10402. High-pressure hydraulic cutting nozzle; 10403. Driving device; 105. Wire cutting device; 10501. Electro-hydraulic push rod; 10502. Cutting wire rope; 10503. Cutting bow; 10504. Cutting frame; 2. Measuring and conveying device; 3. First section pre- Pulping mixer; 4. Buffer box; 5. Sand discharge pipe; 6. Second stage homogeneous mixing preparation barrel; 601. Dust collector; 602. Motor; 603. Discharge port; 604. Flow stabilizing grid; 605. Flow field shear plate; 606. Mixing blade; 607. Pneumatic composite ash spraying device; 7. Cement homogenizing gas pipeline; 8. Rotary feeder; 9. Buffer hopper; 10. Manual maintenance gate valve; 11. Cement silo; 1101. Weighing sensor; 12. Compressed air supply pipe. DETAILED DESCRIPTION

[0018] The following embodiments of the technical solution of the present application will be described in detail with reference to the accompanying drawings. The following embodiments are only used to more clearly illustrate the technical solution of the present application and are therefore only examples and are not intended to limit the scope of protection of the present application.

[0019] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by those skilled in the art to which this application belongs; the terms used herein are only for the purpose of describing specific embodiments and are not intended to limit this application; the terms "including" and "having" and any variations thereof in the specification and claims of this application and the above-mentioned figure descriptions are intended to cover non-exclusive inclusions.

[0020] In the description of the embodiments of this application, the technical terms "first" and "second" are used only to distinguish different objects and should not be understood to indicate or imply relative importance or implicitly specify the quantity, specific order, or primary and secondary relationship of the indicated technical features. In the description of the embodiments of this application, the meaning of "plurality" is more than two, unless otherwise clearly and specifically defined.

[0021] References herein to "embodiments" mean that a particular feature, structure, or characteristic described in connection with the embodiments may be included in at least one embodiment of the present application. The appearance of this phrase in various places in the specification does not necessarily refer to the same embodiment, nor does it constitute an independent or alternative embodiment that is mutually exclusive of other embodiments. It is understood, both explicitly and implicitly, by those skilled in the art that the embodiments described herein may be combined with other embodiments.

[0022] In the description of the embodiments of this application, the term "and / or" is simply a description of the association relationship between associated objects, indicating that three relationships can exist. For example, A and / or B can represent the following three situations: A exists alone, A and B exist simultaneously, and B exists alone. In addition, the character " / " in this document generally indicates that the associated objects are in an "or" relationship.

[0023] In the description of the embodiments of the present application, the term "multiple" refers to more than two (including two). Similarly, "multiple groups" refers to more than two groups (including two groups), and "multiple pieces" refers to more than two pieces (including two pieces).

[0024] In the description of the embodiments of the present application, the technical terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc., indicating the orientation or position relationship, are based on the orientation or position relationship shown in the accompanying drawings, and are only for the convenience of describing the embodiments of the present application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the embodiments of the present application.

[0025] In the description of the embodiments of the present application, unless otherwise expressly specified or limited, technical terms such as "installed," "connected," "connected," and "fixed" should be understood in a broad sense. For example, they can refer to fixed connections, detachable connections, or integration; mechanical connections or electrical connections; direct connections or indirect connections through an intermediate medium; internal connections between two components or interactions between two components. Those skilled in the art can understand the specific meanings of the above terms in the embodiments of the present application based on specific circumstances.

[0026] In order to make the purpose, technical solutions and advantages of the present invention more clearly understood, the present invention is further described in detail below in conjunction with the embodiments. It should be understood that the specific embodiments described herein are only used to explain the present invention and are not intended to limit the present invention.

[0027] In order to make the purpose, technical solutions and advantages of this application more clear, the following further describes this application in detail with reference to the embodiments. It should be understood that the specific embodiments described herein are only used to explain this application and are not intended to limit this application.

[0028] In some embodiments, reference 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 mixing device. Among them: The shaping and cutting device 1 is used to shape and cut the high-viscosity tailings filter cake into regular tailings blocks. Specifically, the shaping and cutting device 1 is set at the front end of the system and is a pre-treatment unit for the high-viscosity tailings filter cake. Its function is to crush and cut large, irregular high-viscosity tailings filter cake into regular tailings blocks of uniform size, reducing adhesion and bridging between tailings blocks, while providing a uniform material base for subsequent metering and mixing, and further facilitating subsequent metering and slurrying. Exemplarily, the shaping and cutting device 1 includes a feed hopper, an extrusion 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 shaping mechanism consists of a pair of extrusion rollers arranged in opposite directions and rotating relative to each other, and the roller surfaces are provided with ridges. The loose filter cake is compacted into a sheet structure with uniform thickness through the pressure between the rollers. The thickness of the sheet structure can be adjusted by changing the roller spacing. For example, the roller spacing is 5 cm, and correspondingly, the thickness of the sheet structure filter cake is 5 cm; the multi-stage cutting assembly is located below the extrusion roller, including a transverse cutting knife group and a longitudinal cutting knife group. The transverse knife group cuts the sheet filter cake into long strips, and the longitudinal knife group further cuts the long strips into cubes or rectangular tailings blocks, thereby collaboratively cutting the high-viscosity tailings filter cake into regular blocks, destroying its cohesion, which is beneficial to the subsequent transportation and breakup work, and then beneficial to the uniform contact of the high-viscosity tailings filter cake with cement and water, which is ultimately beneficial to the slurry mixing work.

[0029] The metering and conveying device 2 is connected to the output end of the shaping and cutting device 1, and is used for metering and conveying the tailings blocks. Specifically, the metering and conveying device 2 is a mechanical structure for accurately metering and conveying the regular tailings blocks to the tailings slurry preparation device. The purpose of the device is to realize the weighing and transportation of the regular tailings blocks after cutting, so as to configure the slurry ratio, that is, the structure of the metering and conveying device 2 is not unique, and it includes various structures that can realize the basic technical effect. 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, and the surface of the belt is provided with anti-skid convex patterns to prevent the tailings blocks from sliding. The metering function is realized by two ways: one is to set a weighing section in the middle of the conveyor, and install a high-precision weighing sensor 1101 at the bottom to monitor the cumulative weight of the tailings blocks in the conveying process; the other is to monitor the running speed of the conveyor through an encoder, and calculate the conveying amount per unit time by combining the average size of the tailings blocks in the shaping and cutting device 1, so as to realize the double metering calibration of weight and volume. After the regular tailings blocks fall into the conveying mechanism from the shaping and cutting device 1, the control system adjusts the conveying amount by adjusting the rotating speed of the conveyor according to the preset tailings ratio parameters, and the actual conveying amount is fed back in real time by the weighing sensor 1101, so as to realize the weighing and conveying functions of the high-viscosity tailings filter cake, and the accuracy of the tailings feeding amount is improved through the mutual coordination control of the two parameters, which is beneficial to the formation of high-quality tailings slurry.

[0030] The tailings slurry preparation device includes a first-stage pre-slurry mixer 3 and a buffer tank 4. The first-stage pre-slurry mixer 3 receives the tailings blocks conveyed by the metering and conveying device 2 and adds thickening water, and the buffer tank 4 receives the tailings slurry output by the first-stage pre-slurry mixer 3. Specifically, the first-stage pre-slurry mixer 3 is a periodic forced mixing device that receives the tailings blocks conveyed by the metering and conveying device 2 and adds thickening water to the tailings blocks. The main purpose is to mix the tailings blocks with water to prepare tailings slurry with stable concentration, so as to solve the problem of difficulty in subsequent homogenization caused by fluctuation of tailings slurry concentration. For example, the first-stage pre-slurry mixer 3 is a horizontal or vertical mixing device, which is provided with a tailings block feeding port 101 at the top. The tailings block feeding port 101 is connected to the output end of the metering and conveying device 2, and the first-stage pre-slurry mixer 3 is also provided with a thickening water adding port at the top. The inside is equipped with double-layer stirring paddles for further dispersing the regular tailings blocks and making them fully mixed with water. The thickening water is uniformly injected from the top distribution groove of the mixer through the pipeline, and an electromagnetic flowmeter and a regulating valve are arranged on the pipeline to adjust the water amount according to the water content of the tailings blocks and the target slurry concentration. Specifically, the buffer tank 4 receives the tailings slurry output by the first-stage pre-slurry mixer 3, which is a buffer container. The main purpose is to temporarily store the prepared tailings slurry to realize continuous supply and balance the flow difference between the previous and subsequent processes, so as to solve the connection problem between the periodic mixing and continuous process.

[0031] 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 weight changes of the material in the cement silo 11 to measure the cement feed amount, and the rotary feeder 8 is used to control the cement delivery rate. Specifically, the cement metering and conveying device is used to accurately measure the cement powder according to a preset ratio and convey it to a homogenizing mixing device for synergistic mixing with the tailings slurry. The purpose is to achieve real-time monitoring and control of the cement feed amount. Exemplarily, 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 dust collector on the top, a conical structure at the bottom, and a vibrator installed on the outer wall. The rotary feeder 8 is installed at the cement discharge port at the bottom of the cement silo 11, and the cement delivery amount is adjusted by the speed of the motor 602. The weighing sensor 1101 is installed on the support legs of the cement silo 11 to monitor the weight changes of the cement in the silo in real time.

[0032] The homogeneous mixing device includes a second-stage homogeneous mixing preparation barrel 6. This barrel receives tailings slurry from the buffer tank 4 via a sand discharge pipe 5 and cement powder delivered from the cement metering and delivery device via a cement homogenizing gas pipe 7. This barrel is used to mix the tailings slurry with the cement powder to produce a homogeneous slurry. Specifically, the homogeneous mixing device is the final mixing unit of the system. It utilizes a combination of mechanical agitation and gas collision from the cement homogenizing gas pipe 7 to fully mix the tailings slurry with the cement powder, producing a slurry with a homogeneous consistency that meets filling requirements. Exemplarily, the second-stage homogeneous mixing barrel 6 is a vertical mixing barrel with a tailings mortar inlet at the top. This inlet is connected to the buffer box 4 via a sand discharge pipe 5, and a screw pump is installed on the pipe to control the feed rate. The second-stage homogeneous mixing barrel 6 is also equipped with a cement inlet, which is connected to a rotary feeder 8 via a cement homogenizing air pipe 7. Compressed air is introduced into the air pipe to fluidize the cement. The barrel is equipped with three stirring components. The bottom stirring component is an anchor-type stirring paddle that drives the overall circulation of the material in the barrel. The middle stirring component is a turbine-type stirring paddle that promotes the mixing of cement and mortar with radial shear force. The top stirring component is a defoaming paddle to eliminate bubbles generated during the mixing process. In addition, the side wall of the barrel is equipped with an online concentration meter and a homogeneity detector to monitor the slurry state in real time.

[0033] The present application shapes and cuts the high-viscosity tailings filter cake into regular tailings blocks through the shaping and cutting device 1, which solves the problem of adhesion to the inner wall of the equipment caused by the high viscosity of the material in the traditional disintegrator, and then provides a uniform material basis for subsequent metering and slurrying by destroying the cohesion of the material, which is conducive to eliminating the agglomeration and bridging of high-viscosity tailings. Through the segmented processing design of the tailings slurry preparation device, the first-stage pre-pulping mixer 3 cooperates with the buffering function of the cache box 4, and stabilizes the mortar concentration by balancing the periodic stirring and the connection of the continuous process, which is conducive to providing tailings slurry with constant concentration for homogeneous mixing; through cement metering The conveying device uses a rotary feeder 8 to adjust the cement delivery rate, and uses a weighing sensor 1101 to monitor the overall weight change of the cement silo 11, which solves the problems of poor material feeding and metering distortion caused by cement agglomeration and static pressure in the silo of the screw feeder, and then realizes the regulation of cement feeding rate by avoiding static pressure interference, which is conducive to ensuring the consistency of cement ratio; through the homogeneous mixing device, the air flow mechanical stirring is integrated in the second-stage homogeneous mixing preparation barrel 6, which solves the problem of uneven mixing caused by insufficient time or intensity of a single stirring method, which is conducive to the preparation of high homogeneity of slurry. Therefore, the present application provides an integrated solution that can achieve precise metering and transportation of high-viscosity tailings, precise metering and transportation of cement, and efficient homogeneous mixing of the two.

[0034] In some embodiments, reference Figure 2 The shaping and cutting device 1 includes: a feed port 101, a compacting mechanism, an extrusion and cutting device 104, and a wire cutting device 105, wherein: The feed port 101 is used to input the high-viscosity tailings filter cake. Specifically, the purpose of the feed port 101 is to receive the raw material and guide it into the subsequent processing link. Therefore, its setting position is related to the feeding position of the high-viscosity tailings filter cake. For example, the feed port is set at the top of the shaping and cutting device 1, and its lower outlet is connected to the inlet of the compacting mechanism. The high-viscosity tailings filter cake is guided by gravity for directional transportation into the compacting mechanism. The compacting mechanism includes a rotating shaft driven by a motor 602 and compacting blades 102 provided on the rotating shaft, which are used to compact and shape the tailings filter cake; specifically, the compacting mechanism is composed of a rotating shaft driven by a motor 602 and compacting blades 102 fixed on the shaft, and the motor 602 drives the rotating shaft to drive the compacting blades 102 to rotate at high speed. When the blades come into contact with the tailings, the loose structure of the filter cake is destroyed through the combined action of shear force and normal pressure, thereby applying continuous extrusion force to the loosely bonded tailings filter cake to eliminate internal gaps and improve density, thereby achieving preliminary processing and regularization of the material form, thereby solving the problem of poor fluidity of highly viscous tailings due to strong cohesive force; illustratively, the rotating shaft is driven by a variable frequency reduction motor 602, which can achieve stepless adjustment of the speed, and the compacting blades 102 are spirally distributed on the rotating shaft, with a gap between the edge of the blade and the inner wall of the cylinder of the compacting mechanism to facilitate unobstructed passage of the tailings filter cake; The extrusion cutting device 104 is located below the compaction mechanism and 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 pass through a geometrically constrained channel to form a strip with a fixed cross section, and at the same time, the blade completes the preliminary cutting work. The extrusion cutting device 104 limits the lateral flow of tailings by mechanical constraint, so that the tailings are forced to pass through a specific shaped mold under axial pressure, thereby further processing the preliminarily processed compacted tailings filter cake into regular strip-shaped or sheet-shaped bodies to facilitate further processing. For example, the extrusion cutting device 104 is composed of a fixed mold plate and a movable extrusion head. The fixed mold plate has a plurality of uniformly distributed forming holes. The shape of the forming holes can be circular, square or rhombic according to requirements. The movable extrusion head is driven by a hydraulic cylinder and can reciprocate along the axis of the fixed mold plate. The speed and stroke of the movable extrusion head can be adjusted by a hydraulic control system. When the compacted tailings filter cake enters the extrusion cutting device 104, the movable extrusion head advances forward to extrude the tailings filter cake through the forming holes on the fixed mold plate, forming a strip-shaped tailings with a fixed cross-sectional shape.

[0035] The wire cutting device 105 is located below the extrusion cutting device 104 and is used to further cut the preliminarily cut tailings block into regular size. 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 block into uniform size cubic or cuboid units. The wire cutting device 105 applies a cutting force to the tailings strip through a high-speed moving cutting wire, thereby achieving the division of the twice processed tailings filter cake to form uniform size cubic or cuboid units, which is conducive to subsequent metering and conveying work in the metering and conveying device 2, and also conducive to preliminary mixing work in the first section of the precast slurry mixer 3. The regular small volume units can reduce the mixing difficulty caused by the high viscosity characteristics in mixing, and further solve the metering error problem caused by tailings adhesion in traditional belt conveying and the mixing insufficiency problem of large volume high viscosity tailings filter cake. For example, the wire cutting device 105 includes a plurality of parallel arranged cutting wires, the two ends of each cutting wire are connected to an adjustable tensioning mechanism to ensure that the cutting wire always maintains appropriate tension. The multiple sets of cutting wires are arranged in layers in the horizontal direction. The drive system of the wire cutting device 105 uses a servo motor 602 to drive the cutting wires to move at high speed. When the preliminarily cut tailings block falls into the wire cutting device 105 from the extrusion cutting device 104, the high-speed moving cutting wire will further cut the tailings block into smaller, uniform size block or strip units.

[0036] In some embodiments, reference is made to Figure 3The extrusion and cutting device 104 includes: a downward belt 10401, a high-pressure water cutting nozzle 10402 and a driving device 10403, wherein: The downward belts 10401 are arranged in groups and rotate relative to each other in pairs to form a semi-enclosed inward channel with a large upper opening and a small lower opening, which is used to squeeze the tailings filter cake and prevent adhesion. Specifically, the downward belts 10401 rotate relative to each other in pairs to form a semi-enclosed inward channel, and the channel is designed as a tapered structure with a large upper opening and a small lower opening. This exerts a continuous squeezing effect on the compacted tailings filter cake and forces it to pass through the geometrically constrained space and form into a continuous sheet. This allows the highly viscous tailings filter cake, which has undergone dense processing from the compaction mechanism but has an irregular shape, to be regularized to facilitate subsequent processing. The high-pressure hydraulic cutting nozzle 10402 is provided at the lower outlet of the downward belt 10401 and is used to preliminarily cut the formed tailings into blocks. Specifically, the high-pressure hydraulic cutting nozzle 10402 is provided at the lower outlet of the downward belt 10401 and preliminarily cuts the formed flake tailings, thereby preliminarily dividing it into smaller units. The driving device 10403 is connected to the downward belt 10401 to drive its rotation.

[0037] In some embodiments, reference 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 push rod 10501, wherein: 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 a stable support for the cutting track and provide a guide reference for the dynamic cutting action, so that the cutting bow 10503 can slide inside it. The cutting bow 10503 is slidably disposed within a groove of the cutting frame 10504. Specifically, the cutting bow 10503 is a sliding frame structure for mounting the cutting wire rope 10502. Its purpose is to provide a mounting position for the cutting wire rope 10502 and to drive the cutting wire rope 10502 to produce directional movement under the linear driving force of the electro-hydraulic push rod 10501, thereby achieving the cutting function. The cutting wire rope 10502 is inserted through the front end of the cutting bow 10503 and is used to horizontally cut the tailings blocks. Specifically, the cutting wire rope 10502 is a tensile and wear-resistant metal filament or thin wire. It is inserted through the front end of the cutting bow 10503 and is tightened by the tension of the cutting bow 10503. The purpose of the cutting wire rope 10502 is to finely cut the flaky and highly viscous tailings discharged from the extrusion and cutting device 104 through its own high-speed reciprocating motion. The electro-hydraulic push rod 10501 is connected to the cutting bow 10503 and is used to drive the cutting bow 10503 to move in a telescopic manner.

[0038] In this embodiment, the tailings blocks initially split by the high-pressure hydraulic cutting nozzle 10402 fall to the positioning platform of the cutting frame 10504, and the electro-hydraulic push rod 10501 drives the cutting bow 10503 to slide horizontally along the frame groove, driving the cutting wire rope 10502 to cross the cross-section of the tailings blocks with constant tension, thereby achieving secondary precise cutting of the tailings blocks. This not only avoids the problem of knife sticking that may occur in the cutting of highly viscous tailings, but also improves the geometric regularity and metering stability of the tailings blocks.

[0039] In some embodiments, reference Figure 1 The cement metering and conveying device further includes: a manual inspection gate valve 10, a buffer hopper 9 and a compressed air supply pipe 12, wherein: A manual inspection gate valve 10 is provided at the discharge port of the cement silo 11. Specifically, the purpose of providing the manual inspection gate valve 10 is to achieve physical isolation and sealing of the cement silo 11 during equipment maintenance, thereby ensuring operational safety. The buffer hopper 9 is connected to the bottom of the manual inspection gate valve 10 and is used to temporarily store cement. Specifically, the buffer hopper 9 is set up to temporarily store cement by expanding the volume and eliminating the impact of material discharge, thereby providing stable and continuous feeding conditions for the rotary feeder 8. The compressed air supply pipe 12 is connected to the output end of the rotary feeder 8 to provide pneumatic conveying power. Specifically, the compressed air supply pipe 12 is connected to the output end of the rotary feeder 8, thereby providing pneumatic conveying power for the cement powder, achieving high-speed and efficient conveying of the cement powder.

[0040] In some embodiments, reference Figure 1 and Figure 5 , one end of the cement homogeneous gas transmission 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-stage homogeneous mixing preparation barrel 6, which is used to mix the cement powder with the compressed air to form a homogeneous gas-solid mixture and transport it. Specifically, one end of the cement homogeneous gas transmission pipe 7 is connected to the junction of the rotary feeder 8 and the compressed air supply pipe 12, so as to mix the cement powder with the compressed air and realize efficient transportation of the cement powder under the pressure provided by the compressed air; the other end is connected to the pneumatic composite ash spraying device 607 of the second-stage homogeneous mixing preparation barrel 6, whose core function is to spray the mixture of homogeneous compressed air and cement powder into the tailings mortar, and make the cement powder homogeneously diffused through the disturbance of high-speed gas, thereby improving the mixing uniformity between the cement powder and the tailings mortar, thereby avoiding the uneven mixing phenomenon caused by cement agglomeration in traditional mechanical stirring.

[0041] In some embodiments, reference Figure 5The second stage homogenizing mixing preparation barrel 6 includes: a motor 602, a stirring blade 606, a flow field shear plate 605 and a dust collector 601, wherein: The motor 602 drives the stirring shaft to rotate. Specifically, the purpose of the motor 602 is to provide power to the output shaft of the stirring blade 606. Therefore, its location depends on the specific needs of the stirring blade 606. For example, the motor 602 is located at the top of the second-stage homogeneous mixing preparation barrel 6. The stirring blade 606 is provided on the stirring shaft and is used to mechanically disturb the material; Figure 5 and Figure 6 The stirring blade 606 is fixed on the stirring shaft. Its purpose is to apply mechanical shear force to the mixture of tailings mortar and cement powder to destroy the agglomerates, thereby achieving mixing of the two.

[0042] The flow field shear plates 605 are evenly arranged along the circumference of the inner wall of the barrel and 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 shear plates 605 are evenly arranged along the circumference of the barrel inner wall and staggered with the mixing blades 606, guiding the flow field in the barrel to form a high-intensity turbulent area, thereby accelerating the dispersion of cement particles and further accelerating the mixing between the tailings slurry and cement.

[0043] The dust collector 601 is located at the top of the barrel and is used to process the exhaust gas from the barrel. Specifically, the dust collector 601 is located at the exhaust port on the top of the barrel to process the dust-laden gas escaping during the mixing process and capture cement particles therein, thereby solving the dust pollution problem caused by high-pressure gas transportation during the powder mixing process.

[0044] In some embodiments, reference Figure 5 、 Figure 8 as well as Figure 9 The second stage homogeneous mixing preparation barrel 6 also includes: a pneumatic composite ash spraying device 607 and a flow stabilizing grid 604, wherein: 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. It includes multiple pneumatic pipes arranged in a tangential direction and is used to spray the cement mixture conveyed by the cement homogenizing air pipe 7 into the barrel. Specifically, 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. Its purpose is to spray the homogeneous mixture of cement powder conveyed by the cement homogenizing air pipe 7 and compressed air into the barrel in the form of a high-speed tangential jet, thereby generating a rotating airflow inside the second-stage homogenizing mixing preparation barrel 6, so that the cement powder is evenly dispersed in the tailings slurry, avoiding the problem of local enrichment of the slurry due to cement agglomeration. The flow stabilizing grid 604 is arranged in front of the discharge port 603 at the output end of the barrel body, and is used to remove bubbles in the slurry; specifically, the flow stabilizing grid 604 is arranged in front of the discharge port 603 at the output end of the barrel body, and removes entrained bubbles in the slurry through the porous barrier structure, thereby avoiding the slurry density fluctuation caused by the coexistence of gas-liquid two phases during stirring and mixing, which is beneficial to improving the uniformity of the slurry.

[0045] The inlet position of the sand discharge pipe 5 is lower than the pneumatic composite ash spraying device 607. Specifically, in this embodiment, the sand discharge pipe 5 is connected to the bottom area of ​​the second-stage homogeneous mixing preparation barrel 6, and the position where the sand discharge pipe 5 is connected is lower than the setting position of the pneumatic composite ash spraying device 607. The purpose is to prevent gas from entering the sand discharge pipe 5 and affecting the transportation of the mortar.

[0046] In some embodiments, reference Figure 1 The metering and conveying device 2 is a metering belt scale. Its conveying path corresponds to the output of the shaping and cutting device 1. It is used to weigh the tailings blocks in real time and feed back to the control system. Specifically, its purpose is to achieve continuous dynamic measurement of the tailings block weight during the conveying process.

[0047] In some embodiments, reference Figure 1 and Figure 5 The output end of the first-stage pre-pulping mixer 3 is connected to a buffer box 4 via a pipe; the output end of the buffer box 4 is connected to the bottom area of ​​the second-stage homogeneous mixing preparation barrel 6 via a sand discharge pipe 5. Specifically, the buffer box 4 expands its volume to temporarily store the tailings slurry, providing buffer space. Through the principle of a communicating vessel, the tailings slurry's own weight is utilized to provide the power for transporting the slurry to the second-stage homogeneous mixing preparation barrel 6. This also prevents the backflow of gas from the pneumatic composite ash spraying device 607 into the sand discharge pipe 5, which would otherwise reduce transportation efficiency.

[0048] The above description is only 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 any technician familiar with this technical field within the technical scope disclosed by the present invention and within the spirit and principles of the present invention should be covered by the scope of protection of the present invention.

[0049] It should be noted that the present application is not limited to the above-mentioned embodiments. The above-mentioned embodiments are merely examples, and any embodiments having substantially the same structure and effect as the technical concept within the scope of the present application are all included in the technical scope of the present application. In addition, without departing from the scope of the present application, any other embodiments that can be conceived by those skilled in the art and that combine some of the constituent elements in the embodiments are also included in the scope of the present application.

Claims

1. A high viscosity tailings feeding metering and slurry preparation device, characterized in that: include: A shaping and cutting device (1) is used to shape and cut the highly viscous tailings filter cake into regular tailings blocks; A 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 slurry preparation device comprises a first-stage pre-pulping mixer (3) and a buffer box (4), wherein the first-stage pre-pulping mixer (3) receives the tailings blocks conveyed by the metering and conveying device (2) and adds concentrated water, and the buffer box (4) receives the tailings slurry output by the first-stage pre-pulping mixer (3); A cement metering and conveying device comprises a cement silo (11), a rotary feeder (8) and a weighing sensor (1101), wherein the weighing sensor (1101) is used to monitor the weight change of the material in the cement silo (11) to measure the cement feeding amount, and the rotary feeder (8) is used to control the cement conveying rate; The homogeneous mixing device comprises a second-stage homogeneous mixing preparation barrel (6), which receives tailings slurry from the buffer box (4) through a sand discharge pipe (5) and receives cement powder delivered by a cement metering and conveying device through a cement homogeneous gas delivery pipe (7), and is used for mixing the tailings slurry with the cement powder to prepare homogeneous slurry.

2. A high viscosity tailings feeding metering and slurry preparation device according to claim 1, characterized in that: The shaping and cutting device (1) comprises: A feed port (101) for inputting highly viscous tailings filter cake; A compacting mechanism, comprising a rotating shaft driven by a compacting motor (103) and compacting blades (102) arranged on the rotating shaft, for compacting and shaping the tailings filter cake; An extrusion and cutting device (104), located below the compacting mechanism, is used to extrude and preliminarily cut the compacted tailings filter cake; The wire cutting device (105) is located below the extrusion cutting device (104) and is used to further cut the tailings blocks after the initial cutting into regular sizes.

3. A high viscosity tailings feeding metering and slurry preparation device according to claim 2, characterized in that: The extrusion and cutting device (104) comprises: Downward belts (10401) are arranged in groups and rotate relative to each other in pairs to form a semi-enclosed inward channel, wherein the upper opening of the channel is large and the lower opening is small, and are used to squeeze the tailings filter cake and prevent adhesion; A high-pressure hydraulic cutting nozzle (10402) is provided at the lower outlet of the downward belt (10401) and is used to preliminarily cut the formed tailings into blocks; The driving device (10403) is connected to the downward belt (10401) to drive the downward belt (10401) to rotate.

4. A highly viscous tailings feed metering and slurry preparation device according to claim 2, characterized in that: The wire cutting device (105) comprises: Cutting frame (10504), providing cutting track; A cutting bow (10503) is slidably disposed in a groove of the cutting frame (10504); A cutting wire rope (10502) is passed through the front end of the cutting bow (10503) and is used for horizontally cutting tailing blocks; The electro-hydraulic push rod (10501) is connected to the cutting bow (10503) and is used to drive the cutting bow (10503) to move in a telescopic manner.

5. The high-viscosity tailings feeding metering and slurry preparation device according to claim 1, characterized in that: The cement metering and conveying device further comprises: A manual inspection gate valve (10) is provided at the discharge port of the cement silo (11); A buffer hopper (9) is connected below the manual inspection gate valve (10) and is used for temporarily storing cement; A compressed air supply pipe (12) is connected to the output end of the rotary feeder (8) and is used to provide pneumatic conveying power.

6. A highly viscous tailings feed metering and slurry preparation device according to claim 5, characterized in that: One end of the cement homogeneous gas transmission 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-stage homogeneous mixing preparation barrel (6), which is used to mix cement powder with compressed air to form a homogeneous gas-solid mixture and transport it.

7. The high-viscosity tailings feed metering and slurry preparation device according to claim 1, characterized in that: The second stage homogeneous mixing preparation barrel (6) comprises: A motor (602) drives the stirring shaft to rotate; A stirring blade (606), provided on the stirring shaft, for mechanically disturbing the material; The flow field shear plates (605) are evenly arranged along the circumference of the inner wall of the barrel and staggered with the stirring blades (606) to guide the flow field to form turbulence; The dust collector (601) is arranged on the upper part of the barrel body and is used to process the gas discharged from the barrel.

8. A highly viscous tailings feed metering and slurry preparation device according to claim 7, characterized in that: The second stage homogeneous mixing preparation barrel (6) further comprises: The pneumatic composite ash spraying device (607) is arranged at the bottom of the barrel and above the inlet of the sand discharge pipe (5), and includes a plurality of pneumatic pipes arranged along the tangential direction, and is used to spray the cement mixture transported by the cement homogenizing gas transmission pipe (7) into the barrel; A flow stabilizing grid (604) is provided in front of the discharge port (603) at the output end of the barrel body and is used to remove bubbles in the slurry; The inlet position of the sand discharge pipe (5) is lower than the pneumatic composite dust spraying device (607).

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

10. The high-viscosity tailings feeding metering and slurry preparation device according to claim 1, characterized in that: The output end of the first-stage pre-pulping mixer (3) is connected to a buffer box (4) via a pipeline; the output end of the buffer box (4) is connected to the bottom area of ​​the second-stage homogeneous mixing preparation barrel (6) via a sand discharge pipe (5).

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