Energy-concentrating ultrasonic scrubbing device and deep desludging system for muddy sandstone uranium ore

Abstract

The invention discloses an energy-concentrating ultrasonic scrubbing device and a deep desludging system for muddy sandstone uranium ore, comprising a scrubbing cylinder, a reverse stirring system, an energy-concentrating ultrasonic vibrator and a slurry storage tank; the reverse stirring system is located inside the scrubbing cylinder, comprising a rotating shaft and at least four layers of reverse stirring blade structures arranged along its axial direction, each layer of the reverse stirring blade structure comprising a plurality of blades arranged circumferentially along the rotating shaft, and the blades of two adjacent layers of reverse stirring blade structures are inclined in opposite directions relative to the rotating shaft; the energy-concentrating ultrasonic vibrator comprises an ultrasonic transducer device and an energy-concentrating vibration conduction rod, the ultrasonic transducer device is fixed to the outside of the scrubbing cylinder, the energy-concentrating vibration conduction rod is connected to the ultrasonic transducer device and is located inside the scrubbing cylinder; the discharge port of the overflow slag discharge pipe of the scrubbing cylinder is directly diverted to the slurry storage tank. The invention realizes deep separation of mud and sand under the combined action of high-pressure scrubbing in a multiphase flow channel and low-frequency high-energy ultrasonic vibration, thereby realizing deep desludging of muddy sandstone uranium ore.

Description

Technical Field

[0001] The invention relates to the technical field of efficient uranium beneficiation and deep graded separation and disposal, and in particular to low-frequency and high-energy extreme desludging equipment for argillaceous sandstone uranium ore. Background Art

[0002] How to fully and accurately extract uranium metal and reduce the residual uranium in tailings has put forward higher requirements for the mining and extreme concentration technology of uranium resources. In particular, in addition to a large number of free-state lumps of mud, the surface of the sandstone ore particles is tightly attached with a layer of fine clay particles, which seriously hinders the full contact between the chemical leaching solution and the minerals, reducing the chemical leaching of metal ores. Therefore, deep desludging of ore has become a difficult problem that needs to be solved urgently in high-precision mineral processing technology.

[0003] At present, the commonly used desludging devices in the industry include drum machines and scrubbers. The drum machine is mainly used to break and separate the free mud in the mud-sand mixed ore after primary crushing, and the kinetic energy generated by the drum machine is not enough to separate the mud and clay wrapped on the surface of the sand particles, so it is often used as a cleaning for conventional ores with low requirements. The scrubber can destroy and separate about 80% of the clay wrapped on the surface of the sand particles through strong stirring and collision and friction between particles, achieving a relatively considerable desludging effect. Its application in metal ore beneficiation technology has been paid attention to and is also a conventional solution for beneficiation desludging technology. There are also related technologies that propose methods such as ultrasonic crushing or increasing the scrubbing time in multiple series, but due to the lack of reasonable structural design, it is just a simple combination of multiple physical superposition methods, and the desludging effect has not been actually improved. However, compared with high-value metal ores such as uranium and gold, the desludging efficiency is higher, especially the uranium ore requires a lower mud content (less than 3%). Simply connecting the scrubber in series to increase the scrubbing time and speed still cannot destroy the adhesion of the sand interface to completely separate the clay and sand. Summary of the invention

[0004] The main purpose of the present invention is to propose an energy-focusing ultrasonic scrubbing device, which increases the collision friction strength between mineral particles and destroys the adhesion of sand grain interfaces through mechanical kinetic energy, thereby achieving a complete separation of clay particles from sand grains, so as to solve the key technical problem of improving high-precision mineral processing of high-value metals; at the same time, the present invention also proposes a deep desludging system for muddy sandstone uranium ore, which can achieve deep desludging of muddy sandstone uranium ore.

[0005] The technical solution adopted by the present invention is:

[0006] A concentrated energy ultrasonic scrubbing device comprises a scrubbing cylinder, a reverse stirring system, an energy concentrated ultrasonic vibrator and a slurry storage tank; the scrubbing cylinder is provided with a material inlet hopper and an overflow slag discharge pipe; the reverse stirring system is arranged inside the scrubbing cylinder, comprising a rotating shaft and at least four layers of reverse stirring blade structures arranged axially along the rotating shaft, each layer of the reverse stirring blade structure comprises a plurality of blades arranged circumferentially along the rotating shaft, and the blades of two adjacent layers of reverse stirring blade structures are inclined in opposite directions relative to the rotating shaft; the energy concentrated ultrasonic vibrator comprises an ultrasonic transducer device and an energy concentrated vibration conduction rod, the ultrasonic transducer device is fixed to the outside of the scrubbing cylinder, the energy concentrated vibration conduction rod is connected to the ultrasonic transducer device and is located inside the scrubbing cylinder; the slurry storage tank is connected to the overflow slag discharge pipe, and the discharge port of the overflow slag discharge pipe directly guides flow to the slurry storage tank.

[0007] In the above solution, the angle between the blades of the reverse stirring blade structure and the rotating axis does not exceed 45°.

[0008] In the above solution, the energy-concentrating vibration conducting rod is provided with a plurality of spherical grooves at intervals along its axial direction.

[0009] In the above solution, the frequency of the energy-concentrating ultrasonic vibrator is 20-25KHz, and the amplitude is 80-100μm.

[0010] In the above scheme, the slurry storage tank is arranged at the bottom of the scrubbing cylinder, and a cleaning discharge port is provided at the bottom of the scrubbing cylinder as a shutdown unloading cleaning and sewage discharge channel, and a gate valve is provided in a normally closed state.

[0011] In the above scheme, the slurry storage tank is provided with a clean water pipe for adding clean water; a mud mixing device is also provided inside the slurry storage tank; a slurry discharge port and a high-pressure centrifugal slurry pump are provided at the bottom of the slurry storage tank, and the mud material is lifted and discharged by the high-pressure centrifugal slurry pump.

[0012] In the above scheme, the interior of the scrubbing cylinder is set to a single compartment or multiple compartments according to the production capacity requirements, and each compartment is provided with a set of the reverse stirring system and the energy-concentrating ultrasonic vibrator; when it is set to multiple compartments, an intermediate baffle is provided to divide the interior of the cylinder into multiple compartments, and a connecting channel is left at the bottom or top of the intermediate baffle to connect the compartments to each other, and the connecting channels are arranged alternately up and down to ensure that the material passes through the stirring area fully.

[0013] In the above scheme, the energy-concentrating ultrasonic scrubbing device also includes a power reducer installed on the scrubbing cylinder, and the output end of the power reducer is connected to the rotating shaft of the reverse stirring system.

[0014] In the above scheme, the energy-focusing ultrasonic scrubbing device also includes an energy-focusing ultrasonic power supply installed on the scrubbing cylinder, and the energy-focusing ultrasonic power supply is electrically connected to the ultrasonic transducer device.

[0015] Correspondingly, the present invention also proposes a deep desludging system for muddy sandstone uranium ore, comprising the above-mentioned energy-concentrating ultrasonic scrubbing device, and also comprising a multiphase flow cyclone classification device and a high-frequency linear vibration dehydration device; the multiphase flow cyclone classification device comprises a cyclone; the high-frequency linear vibration dehydration device comprises a high-frequency linear vibration screen and a clean water tank; the slurry inlet of the cyclone is connected to the slurry discharge port of the slurry storage tank, and the mud material from the slurry storage tank is subjected to the cyclone centrifugal power flow field to separate the mixed material into particles in the cyclone, and the small-particle mixture is discharged from the overflow port at the upper end of the cyclone, and the large-particle mixture is discharged from the bottom flow port of the cyclone to the high-frequency linear vibration screen for sand dehydration; the material on the screen of the high-frequency linear vibration screen is the finished sand and gravel material, and the water generated under the screen is discharged to the clean water tank.

[0016] In the above scheme, the pulp discharge port at the bottom of the clean water tank of the high-frequency linear vibration dehydration device is connected to the clean water pipe of the energy-concentrating ultrasonic scrubbing device to form a clean water recycling method.

[0017] In the above solution, the high-frequency linear vibration dehydration device also includes a cleaning device arranged above the high-frequency linear vibration screen machine.

[0018] The beneficial effects produced by the present invention are:

[0019] 1. The energy-concentrating ultrasonic scrubbing device of the present invention, on the one hand, improves the desludging effect through a multi-layer reverse stirring blade structure. Specifically, the trumpet-shaped channel formed by two adjacent layers of reverse stirring blade structures gathers and compresses the slurry to form a compressed multiphase flow channel, which increases the mutual friction power between the mineral particles and realizes strong scrubbing, thereby crushing and breaking up small-sized clay particles, and destroying the fine-grained clay layer wrapped on the surface of the sand particles; at the same time, the closing structure formed between the two adjacent trumpet-shaped channels, when rotating and stirring clockwise, reduces the pressure at the center of the rear end flow field, increases the slurry turbulence, and continues to increase the collision friction between the particles, thereby realizing efficient desludging of muddy sandstone particles. On the other hand, the ultrasonic kinetic energy and cavitation explosion kinetic energy provided by low-frequency and high-energy ultrasonic vibration are far greater than the interfacial adhesion force, destroying the sand particle interface and separating the clay particles. Deep separation of mud and sand is achieved under the combined action of high-pressure scrubbing in the multiphase flow channel and low-frequency and high-energy ultrasonic vibration.

[0020] 2. The present invention designs the energy-concentrating vibration conduction rod as an energy-concentrating structure, that is, a plurality of spherical grooves are arranged at intervals along its axial direction. When the end face of the energy-concentrating vibration conduction rod generates high-intensity axial vibration, the spherical structure of the spherical groove contacts the mud medium to form a large number of cavitation nuclei with the center of the sphere as the center, generating a large cavitation intensity and energy, and diffuses divergently to finally achieve high-energy vibration similar to the lateral direction, thereby increasing the vibration dimension and density, causing greater destructive force on the particle surface, peeling off the clay particles, and further reducing the mud content of the uranium ore.

[0021] 3. The deep desludging system for muddy sandstone uranium ore proposed in the present invention first realizes deep separation of mud and sand through a concentrated ultrasonic scrubbing device; then the mixed material is separated by particle size through the cyclone centrifugal dynamic flow field of the multiphase flow cyclone classification device, so as to realize accurate separation of fine clay or mud particles and sand particles; finally, the sand particles are dehydrated to obtain clean sand and gravel finished materials through linear vibration screening of a high-frequency linear vibration dehydration device for solid-liquid separation, so as to meet the subsequent heap leaching beneficiation process; finally, deep desludging of muddy sandstone uranium ore is realized. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the following briefly introduces the drawings required for use in the embodiments or the description of the prior art. Obviously, the drawings described below are some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0023] Figure 1 It is a structural schematic diagram of the energy-concentrating ultrasonic scrubbing device of the present invention;

[0024] Figure 2 yes Figure 1 A schematic structural diagram of a reverse stirring system of an energy-concentrating ultrasonic scrubbing device;

[0025] Figure 3 yes Figure 1 A schematic structural diagram of an energy-concentrating ultrasonic vibrator of the energy-concentrating ultrasonic scrubbing device shown;

[0026] Figure 4 yes Figure 3 The structural principle diagram of the energy-concentrating ultrasonic vibrator at position B is shown;

[0027] Figure 5 It is a structural schematic diagram of a deep desludging system for muddy sandstone uranium ore according to the present invention.

[0028] In the figure: 4, energy-concentrating ultrasonic scrubbing device; 41, scrubbing cylinder; 411, feeding hopper; 412, overflow slag pipe; 42, reverse stirring system; 421, rotating shaft; 422, first layer blades; 423, second layer blades; 424, third layer blades; 425, fourth layer blades; 43, power reducer; 44, energy-concentrating ultrasonic vibrator; 441, ultrasonic transducer; 442, fixing flange; 443, energy-concentrating vibration conduction rod; 4431, spherical groove; 4432, end face; 45, energy-concentrating ultrasonic power supply; 46, slurry storage tank; 461, clean water pipe; 462, slurry mixing device; 47, cleaning discharge port; 48, high-pressure centrifugal slurry pump;

[0029] 5. Multiphase flow cyclone classification device; 51. Cyclone; 52. Fixed bracket;

[0030] 6. High-frequency linear vibration dehydration device; 61. High-frequency linear vibration screen; 62. High-frequency vibration motor; 63. Clean water tank; 64. Cleaning device. DETAILED DESCRIPTION

[0031] In order to make the purpose, technical solution and advantages of the present invention more clearly understood, the present invention is further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present invention and are not used to limit the present invention.

[0032] It should be noted that the illustrations provided in the embodiments of the present invention are only used to illustrate the basic concept of the present invention in a schematic manner. Therefore, the drawings only show components related to the present invention rather than being drawn according to the number, shape and size of components in actual implementation. In actual implementation, the type, quantity and proportion of each component may be changed arbitrarily, and the component layout type may also be more complicated.

[0033] In the present invention, it is also necessary to explain that, if the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc. appear, the orientation or position relationship indicated is based on the orientation or position relationship shown in the drawings, which is only for the convenience of describing the present application and simplifying the description, and does 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 present application. In addition, if the terms "first" and "second" appear, they are only used for description and distinction purposes, and cannot be understood as indicating or implying relative importance.

[0034] like Figure 1As shown, an energy-concentrating ultrasonic scrubbing device 4 proposed in an embodiment of the present invention includes a scrubbing cylinder 41, a reverse stirring system 42, an energy-concentrating ultrasonic vibrator 44 and a slurry storage tank 46. Among them, a feed hopper 411 is provided on one end wall of the scrubbing cylinder 41, and an overflow slag discharge pipe 412 is provided on the other end wall, so as to form a complete channel for feeding, filling and overflow drainage. The reverse stirring system 42 is arranged inside the scrubbing cylinder 41, and the reverse stirring system 42 includes a rotating shaft 421 and at least four layers of reverse stirring blade structures arranged axially along the rotating shaft 421, wherein the rotating shaft 421 is connected to a power reducer 43 arranged above the scrubbing cylinder 41 through a transmission shaft, and can rotate at high speed under the drive of the power reducer 43. Each layer of the reverse stirring blade structure includes a plurality of blades arranged circumferentially along the rotating shaft 421, and the blades of the two adjacent layers of the reverse stirring blade structure are inclined in opposite directions relative to the rotating shaft 421. The energy-concentrating ultrasonic vibrator 44 includes an ultrasonic transducer 441 and an energy-concentrating vibration conduction rod 443. The ultrasonic transducer 441 is fixed to the outside of the scrubbing cylinder 41 through a fixing flange 442. The energy-concentrating vibration conduction rod 443 is connected to the ultrasonic transducer 441 and is located inside the scrubbing cylinder 41. The slurry storage tank 46 is arranged below the scrubbing cylinder 41 as a load-bearing platform of the energy-concentrating ultrasonic scrubbing device 4. The slurry storage tank 46 is connected to the overflow slag discharge pipe 412, and the discharge port of the overflow slag discharge pipe 412 is directly guided to the slurry storage tank 46.

[0035] The energy-concentrating ultrasonic scrubbing device 4 of the present invention realizes compression of the multiphase flow channel through at least four layers of reverse stirring blade structures, increases the mutual friction power between the mineral particles, realizes strong scrubbing, breaks up the small-size clay particles, and destroys the fine-grained clay layer wrapped on the surface of the sand particles; at the same time, the ultrasonic kinetic energy and cavitation explosion kinetic energy provided by the low-frequency high-energy ultrasonic vibration are far greater than the interfacial adhesion force, destroys the clay interface on the surface of the sand particles, and the clay particles are separated; under the combined action of high-pressure scrubbing in the multiphase flow channel and low-frequency high-energy ultrasonic vibration, deep separation of mud and sand is achieved.

[0036] like Figure 2As shown, in this embodiment, the reverse stirring system 42 includes a four-layer reverse stirring blade structure uniformly arranged along the axial direction of the rotating shaft 421, and each layer of the reverse stirring blade structure includes six blades uniformly arranged circumferentially along the rotating shaft 421, and the two adjacent layers of blades from top to bottom are designed as reverse structures. The reverse stirring system 42 rotates clockwise when working, and each layer of blades forms a certain angle A with the axis, such as the first layer of blades 422 tilts to the left in the direction of the upstream water flow, and the second layer of blades 423 tilts to the right, and they are arranged in sequence. Finally, the first layer of blades 422 and the second layer of blades 423, the third layer of blades 424 and the fourth layer of blades 425 respectively form two bell-mouth channels. When the reverse stirring system 42 rotates clockwise, the bell-mouth channel gathers and compresses the slurry to form a compressed multiphase flow channel, increases the mutual friction power between the mineral particles, and realizes strong scrubbing, thereby breaking up the small-sized clay particles and destroying the fine-grained clay layer wrapped on the surface of the sand particles. At the same time, a closing structure is formed between the second layer of blades 423 and the third layer of blades 424. When the stirring is rotated clockwise, the pressure of the flow field at the rear end is reduced, the turbulence of the slurry is increased, and the collision friction between the particles is further increased, thereby achieving efficient desludging of muddy sandstone particles. The stirring blades of conventional scrubbing machines only achieve disturbance to form turbulence, and the particles only collide with each other in a disordered manner, and the friction strength is limited.

[0037] Further optimization, in order to ensure the convergence and compression effect and disturbance capacity of the slurry, the angle A between the blades of the reverse stirring blade structure and the rotating shaft 421 is designed to be no more than 45°.

[0038] Further optimized, the power reducer 43 is composed of a variable frequency motor and a reducer, which is used to provide power for the rotating shaft 421, with a maximum torque of 1000 N·m and a rotation speed of 200-300 rpm.

[0039] Further optimization, the energy-gathering ultrasonic scrubbing device 4 also includes an energy-gathering ultrasonic power supply 45 installed on the scrubbing cylinder 41, and the energy-gathering ultrasonic power supply 45 is electrically connected to the ultrasonic transducer 441. Power is provided by the energy-gathering ultrasonic power supply 45, and the electrical energy is converted into ultrasonic mechanical kinetic energy through the ultrasonic transducer 441. The energy-gathering vibration conduction rod 443 conducts low-frequency high-energy vibration to form a cavitation effect in the mud medium. The low-frequency high-energy ultrasonic vibration provides ultrasonic kinetic energy and cavitation explosion kinetic energy that is far greater than the interfacial adhesion force, destroying the sand interface and separating the clay particles. Conventional ultrasonic cleaning machines mostly use a plate structure, that is, multiple small transducers are arranged into a vibration plate to drive the ultrasonic vibration of the side wall of the container. It usually shows insufficient vibration intensity at the same power and low effective kinetic energy. At the same time, although the vibration surface of the ordinary cylindrical vibrating rod can generate high-intensity energy, it only relies on the diameter end face to do work, and the impact range is limited.

[0040] like Figure 3 and Figure 4As shown, in this embodiment, the energy-concentrating vibration conduction rod 443 is designed as an energy-concentrating structure, that is, a plurality of spherical grooves 4431 are arranged at intervals along its axial direction. When the end face 4432 of the energy-concentrating vibration conduction rod 443 generates high-intensity axial vibration, the spherical structure of the spherical groove 4431 contacts the mud medium to form a large number of cavitation nuclei with the center of the sphere as the center, thereby generating a large cavitation intensity and energy, and diffuses divergently to finally realize high-energy vibration similar to the lateral direction, thereby increasing the vibration dimension and density, causing greater destructive force on the particle surface, and peeling off the clay particles.

[0041] Further optimization, in this embodiment, the energy-focusing ultrasonic power supply 45 and the energy-focusing ultrasonic vibrator 44 select industrial-grade low-frequency and high-energy parameters. The frequency of the energy-focusing ultrasonic vibrator 44 is 20-25KHz, the amplitude is 80-100μm, the transmission capacity is high, the cavitation intensity is large, and the efficient vibration effect can affect a three-dimensional space of 300-400mm.

[0042] For further optimization, in this embodiment, a cleaning discharge port 47 is provided at the bottom of the scrubbing cylinder 41 as a shutdown unloading and cleaning sewage discharge channel, and a gate valve is provided in a normally closed state.

[0043] Further optimization, in this embodiment, a clean water pipe 461 is provided on the slurry storage tank 46 for adding clean water; a mud mixing device 462 is also provided inside the slurry storage tank 46. When the mud concentration is too high, clean water needs to be added through the clean water pipe 461 fixed on the frame of the slurry storage tank 46, and the mud mixing device 462 performs uniform mixing. A slurry discharge port and a high-pressure centrifugal slurry pump 48 are provided at the bottom of the slurry storage tank 46, and the high-pressure centrifugal slurry pump 48 is used to lift and discharge the mud material into the next process.

[0044] Further optimization, the interior of the scrubbing cylinder 41 is set to a single bin or multiple bins according to the production capacity requirements, and each bin is provided with a reverse stirring system 42 and an energy-concentrating ultrasonic vibrator 44; when it is set to multiple bins, an intermediate baffle is provided to divide the interior of the cylinder into multiple bins, and a connecting channel is left at the bottom or top of the intermediate baffle so that the bins are interconnected, and the connecting channels are arranged alternately up and down to ensure that the material fully passes through the stirring area, and is uniformly fed from the first bin and discharged from the tail bin. Dividing the interior of the scrubbing cylinder 41 into multiple bins can, on the one hand, increase the scrubbing intensity of the slurry in a single bin, and on the other hand, the interconnection of the bin bottoms increases the flow path and scrubbing time of the mixed slurry material, thereby improving the scrubbing quality. In this embodiment, the interior of the scrubbing cylinder 41 is divided into double bins, which are connected at the bottom.

[0045] like Figure 5As shown, the present invention also proposes a deep desludging system for muddy sandstone uranium ore, including an energy-gathering ultrasonic scrubbing device 4, a multiphase flow cyclone classification device 5 and a high-frequency linear vibration dehydration device 6. The multiphase flow cyclone classification device 5 includes a cyclone 51 and a fixed bracket 52, and the cyclone 51 is installed above the high-frequency linear vibration dehydration device 6 through the fixed bracket 52. The high-frequency linear vibration dehydration device 6 includes a high-frequency linear vibration screen 61, a high-frequency vibration motor 62 and a clean water tank 63. The slurry inlet of the cyclone 51 is connected to the slurry discharge port of the slurry storage tank 46. The slurry material from the slurry storage tank 46 is subjected to the cyclone centrifugal power flow field in the cyclone 51 to separate the mixed materials into particle sizes. The small-particle size mixture is discharged from the overflow port at the upper end of the cyclone 51, and the large-particle size mixture is discharged from the bottom flow port of the cyclone 51 to the high-frequency linear vibration screen 61 for sand dehydration. The water generated during the dehydration process is discharged to the clean water tank 63. The high-frequency vibration motor 62 provides power for the high-frequency linear vibration screen machine 61, and the frequency is set to 30-35 Hz.

[0046] For further optimization, the bottom pulp discharge port of the clean water tank 63 of the high-frequency linear vibration dehydration device 6 is connected to the clean water pipe 461 of the energy-concentrating ultrasonic scrubbing device 4 through pumping and piping, so as to realize the recycling of clean water.

[0047] Further optimized, the high-frequency linear vibration dehydration device 6 also includes a cleaning device 64 arranged above the high-frequency linear vibration screen machine 61.

[0048] The deep desludging system for muddy sandstone uranium ore of the present invention first realizes deep separation of mud and sand through an energy-concentrating ultrasonic scrubbing device 4; then separates the mixed material into particles by a cyclonic centrifugal dynamic flow field to achieve precise separation of fine clay or mud particles from sand particles; finally, dehydrates the sand particles through linear vibration screening solid-liquid separation to obtain clean sandstone ore and a mixed slurry of fine clay particles and mineral powder, and finally realizes deep desludging of muddy sandstone uranium ore. Its specific working principle is as follows:

[0049] For muddy sandstone uranium ore, first, after crushing and washing, a relatively concentrated mud-water mixed slurry (mud concentration is set to 60%-70%) is formed, which enters the scrubbing cylinder 41 from the feed hopper 411, and then enters the energy-concentrating ultrasonic scrubbing device 4. The reverse stirring system 42 realizes the compression of the multiphase flow channel through at least four layers of reverse stirring blade structures, increases the mutual friction power between the ore particles, realizes strong scrubbing, breaks up the small-sized clay particles, and destroys the fine-grained clay layer wrapped on the surface of the sand particles; at the same time, the ultrasonic kinetic energy and cavitation explosion kinetic energy provided by the low-frequency high-energy ultrasonic vibration are far greater than the interface adhesion force, destroying the clay interface on the surface of the sand particles, and the clay particles are separated; the deep separation of mud and sand is achieved under the combined action of high-pressure scrubbing in the multiphase flow channel and low-frequency high-energy ultrasonic vibration;

[0050] After the low-frequency high-energy deep desludging, the mud-sand mixed mud is discharged from the overflow discharge pipe 412 of the scrubbing cylinder 41 and directly directed to the slurry storage tank 46; considering that the mud-sand mixed mud has a high concentration, it is necessary to add clean water through the clean water pipe 461, and mix it through the mud mixing device 462 to dilute the mud concentration to 25%-30%, and the high-pressure centrifugal slurry pump 48 is used to lift the mud material and discharge it into the next process, that is, the multiphase flow cyclone classification device 5;

[0051] The mud material produced in the previous process enters the multiphase flow cyclone classification device 5 at high pressure through the slurry inlet of the cyclone 51; in the multiphase flow cyclone classification device 5, the mixed material is separated by particle size under the centrifugal dynamic flow field of the cyclone, and the median particle size D50 of the separation particle size is 74μm. The mixture of mud clay particles and water with a separation particle size of ≤74μm moves upward on the back of the cyclone 51 and is discharged from the overflow port at the upper end of the cyclone 51 for separate collection and fine particle beneficiation treatment process; while the sand particles with a size of >74μm and water form a relatively concentrated solid-liquid mixture, which is discharged from the bottom flow port of the cyclone 51 to the next process, i.e., the sand particle dehydration process, and then the fine clay particles or mud particles and sand particles are accurately separated by classification;

[0052] The sand dehydration process separates the sand from the water and solid-liquid through the sieve plate set in the high-frequency linear vibration dehydration device 6, so as to obtain the finished sand and gravel material with low water content, which can meet the subsequent heap leaching beneficiation process; finally, the deep desludging of muddy sandstone uranium ore is achieved; the excess water under the solid-liquid separation screen is collected in the clean water tank 63, which can be connected to the clean water pipe 461 of the energy-concentrating ultrasonic scrubbing device 4 through pumping and piping, so as to form a clean water recycling; thus, a technical process of deep desludging of muddy sandstone uranium ore is completed.

[0053] It should be pointed out that, according to the needs of implementation, the various steps / components described in this application can be split into more steps / components, and two or more steps / components or partial operations of steps / components can be combined into new steps / components to achieve the purpose of the present invention.

[0054] The order of execution of each step in the above embodiment does not mean the order of execution. The execution order of each process should be determined by its function and internal logic, and should not constitute any limitation on the implementation process of the embodiment of the present application.

[0055] It should be understood that those skilled in the art can make improvements or changes based on the above description, and all these improvements and changes should fall within the scope of protection of the appended claims of the present invention.

Claims

1. A deep desludging system for muddy sandstone uranium ore, characterized in that: The invention comprises an energy-concentrating ultrasonic scrubbing device, which comprises a scrubbing cylinder, a reverse stirring system, an energy-concentrating ultrasonic vibrator and a slurry storage tank; the scrubbing cylinder is provided with a feed hopper and an overflow slag discharge pipe; the reverse stirring system is arranged inside the scrubbing cylinder, and comprises a rotating shaft and at least four layers of reverse stirring blade structures arranged along the axial direction of the rotating shaft, each layer of the reverse stirring blade structure comprises a plurality of blades arranged along the circumference of the rotating shaft, the angle between the blades and the rotating shaft does not exceed 45°, and the blades of two adjacent layers of the reverse stirring blade structure are inclined in opposite directions relative to the rotating shaft; the energy-concentrating ultrasonic vibrator comprises an ultrasonic transducer device and an energy-concentrating vibration conduction rod, the ultrasonic transducer device The energy-concentrating vibration conduction rod is fixed to the outside of the scrubbing cylinder, connected to the ultrasonic transducer device and located inside the scrubbing cylinder, and the energy-concentrating vibration conduction rod is provided with a plurality of spherical grooves at intervals along its axial direction; the slurry storage tank is connected to the overflow slag discharge pipe, and the discharge port of the overflow slag discharge pipe is directly guided to the slurry storage tank, and the slurry storage tank is arranged at the bottom of the scrubbing cylinder, and a cleaning discharge port is provided at the bottom of the scrubbing cylinder as a shutdown unloading and cleaning sewage discharge channel, and a gate valve is provided in a normally closed state, and a clean water pipe is provided on the slurry storage tank for adding clean water; a mud mixing device is also provided inside the slurry storage tank; a slurry discharge port and a high-pressure centrifugal slurry pump are provided at the bottom of the slurry storage tank, and the mud material is lifted and discharged by the high-pressure centrifugal slurry pump; It also includes a multiphase flow cyclone classification device and a high-frequency linear vibration dehydration device; the multiphase flow cyclone classification device includes a cyclone; the high-frequency linear vibration dehydration device includes a high-frequency linear vibration screen and a clean water tank; the slurry inlet of the cyclone is connected to the slurry discharge port of the slurry storage tank, and the mud material from the slurry storage tank is subjected to the cyclone centrifugal power flow field in the cyclone to separate the mixed material into particles, and the small-particle mixture is discharged from the overflow port at the upper end of the cyclone, and the large-particle mixture is discharged from the bottom flow port of the cyclone to the high-frequency linear vibration screen for sand dehydration; the material on the screen of the high-frequency linear vibration screen is the finished sand and gravel material, and the water produced under the screen is discharged to the clean water tank.

2. The deep desludging system for argillaceous sandstone uranium ore according to claim 1, characterized in that: The frequency of the energy-concentrating ultrasonic vibrator is 20-25 KHz, and the amplitude is 80-100 μm.

3. The deep desludging system for argillaceous sandstone uranium ore according to claim 1, characterized in that: The interior of the scrubbing cylinder is set to a single compartment or multiple compartments according to production capacity requirements, and each compartment is provided with a set of the reverse stirring system and the energy-concentrating ultrasonic vibrator; when it is set to multiple compartments, an intermediate baffle is provided to divide the interior of the cylinder into multiple compartments, and a connecting channel is left at the bottom or top of the intermediate baffle to connect the compartments to each other, and the connecting channels are arranged alternately up and down to ensure that the material passes through the stirring area fully.

4. The deep desludging system for muddy sandstone uranium ore according to claim 1, characterized in that: The energy-concentrating ultrasonic scrubbing device also includes a power reducer installed on the scrubbing cylinder, and the output end of the power reducer is connected to the rotating shaft of the reverse stirring system.

5. The deep desludging system for argillaceous sandstone uranium ore according to claim 1, characterized in that: The energy-focusing ultrasonic scrubbing device further comprises an energy-focusing ultrasonic power supply installed on the scrubbing cylinder, and the energy-focusing ultrasonic power supply is electrically connected to the ultrasonic transducer device.

6. The deep desludging system for argillaceous sandstone uranium ore according to claim 1, characterized in that: The pulp discharge port at the bottom of the clean water tank of the high-frequency linear vibration dehydration device is connected to the clean water pipe of the energy-concentrating ultrasonic scrubbing device to form a clean water recycling method.

7. The deep desludging system for argillaceous sandstone uranium ore according to claim 1, characterized in that: The high-frequency linear vibration dehydration device also includes a cleaning device arranged above the high-frequency linear vibration screen machine.

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