A pneumatic energy mixed phase flow homogenizing device and a high-efficiency homogenizing activation system

Abstract

The present invention discloses a pneumatic kinetic energy mixed phase flow uniform mixing device, a fixed support is installed on the bottom of the uniform mixing reactor cylinder, a mixed phase flow uniform mixing nozzle and a pneumatic kinetic energy distributor are installed on the fixed support, the pneumatic kinetic energy distributor air inlet is connected to the high-pressure gas supply device, and the air outlet is connected to the mixed phase flow uniform mixing nozzle, and pneumatic kinetic energy is provided by a high-pressure gas jet, and is contacted and mixed with the mixed slurry in the limited space in the mixed phase flow uniform mixing nozzle to form a relatively low-density mixed phase flow material, which is rapidly transmitted under the action of continuous pneumatic thrust and buoyancy, and is ejected and diffused at high speed from the pipeline outlet, driving the ore pulp particles to form high-speed turbulence and mixed flow, so that the ore pulp particles and the activator are quickly mixed to achieve shaftless stirring and uniform mixing. The present invention improves the turbulence and mixed flow power between the ore pulp and the activating agent, and the mixed phase flow uniform mixing quality and efficiency. Combining the pneumatic kinetic energy mixed phase flow uniform mixing device and the micro-electrolysis activation device can form an efficient uniform mixing activation system, thereby improving the leaching efficiency of metal minerals.

Description

Technical Field

[0001] The present invention relates to the technical field of efficient uranium beneficiation and deep graded separation and disposal, and in particular to a pneumatic energy mixed phase flow homogenizing device and a high-efficiency homogenizing activation system. Background Art

[0002] In the chemical leaching and beneficiation process of uranium metal ore, the ore pulp after crushing or grinding often needs to be activated by a strong redox environment such as strong acid or strong alkali, and the uranium metal element is leached out through complex chemical reactions.

[0003] To ensure full contact between the mineral particles and the activating agent, physical stirring is required to achieve rapid, homogenous mixing and activation. Furthermore, the slurry and activating agent must be aged for a period of time to achieve metal extraction. Therefore, achieving rapid, homogenous mixing of the slurry and activating agent and reducing aging time are key to achieving efficient chemical leaching and beneficiation processes. Consequently, a highly efficient, corrosion-resistant homogenous mixing and activation system, designed for extreme environments, is urgently needed to optimize efficient metal chemical leaching and beneficiation processes.

[0004] Extreme acidic and alkaline conditions and strong redox environments place extremely high demands on mixing equipment. Besides high speeds and sufficient torque, the corrosion and wear resistance of equipment materials are even more stringent. While the industry is currently extending the service life of mixing equipment through surface coatings and the development of new materials, complex mechanical transmission structures and limited corrosion resistance of sealing structures still pose practical challenges, such as high operating costs, high failure rates, and insufficient mixing and activation efficiency. Therefore, reducing the mechanical transmission structure of the mixing system and achieving shaftless mixing is the key to addressing these challenges. Currently, some methods propose mixing by circulating the mixing pipe within the pumping stroke, while others employ the principle of jet pumps to mix materials by injecting chemicals. However, due to the high corrosion and wear of the pumps in extreme acidic and alkaline conditions and strong redox environments, the failure rate is high, seriously affecting the normal operation of production equipment. Furthermore, simple liquid flushing and suction circulation lacks turbulence and mixing within the mixed slurry, resulting in unstable mixing efficiency and quality, and reduced mixing effectiveness. Summary of the Invention

[0005] The main purpose of the present invention is to provide a pneumatic energy mixed-phase flow homogenizing device, which improves the turbulence and mixed flow power between the ore pulp and the activation agent, strengthens the turbulence and eddy disturbance of the mixed slurry, and effectively improves the quality and efficiency of the mixed-phase flow homogenizing; at the same time, it increases the efficiency of the activation reaction micro-electrolysis, improves the efficiency of homogenizing activation and chemical leaching, and forms an integrated system with efficient ore pulp homogenizing activation function under extreme environments, quickly improves the leaching efficiency of metal minerals, and ultimately dissolves the metal minerals into the solution in the form of ions.

[0006] The technical solution adopted in the present invention is:

[0007] A pneumatic kinetic energy mixed phase flow homogenizing device, comprising a homogenizing reactor cylinder, a mixed phase flow homogenizing injection device and a high-pressure air supply device; the mixed phase flow homogenizing injection device comprises a fixed bracket, a mixed phase flow homogenizing nozzle and a pneumatic kinetic energy distributor, the fixed bracket is fixedly installed at the bottom of the homogenizing reactor cylinder, the mixed phase flow homogenizing nozzle and the pneumatic kinetic energy distributor are respectively installed on the fixed bracket, the air inlet of the pneumatic kinetic energy distributor is connected to the high-pressure air supply device, the air outlet of the pneumatic kinetic energy distributor is connected to the mixed phase flow homogenizing nozzle, and the high-pressure air supply device is provided. The high-pressure gas generated by the gas device enters the mixed-phase flow homogenizing nozzle through the pneumatic energy distributor. In the mixed-phase flow homogenizing nozzle, the high-pressure gas jet provides pneumatic energy, contacts and mixes with the mixed slurry in the limited space in the pipeline, forming a relatively low-density mixed-phase flow material. Under the action of continuous pneumatic thrust and buoyancy, it is quickly transported and ejected and diffused at high speed from the pipeline outlet, driving the slurry particles to form high-speed turbulence and mixed flow, so that the slurry particles and the activator are quickly mixed, completing the mutual conversion between pneumatic kinetic energy and mechanical kinetic energy of the mixed phase to achieve shaftless stirring and homogenizing.

[0008] In the above scheme, the mixed-phase flow mixing nozzle includes a mixed-phase flow nozzle, an axial sleeve and a slurry inlet pipe that are coaxially arranged and interconnected; the upper end of the axial sleeve is fixedly connected to the mixed-phase flow nozzle, and a gap is left between the inner wall of the lower end of the mixed-phase flow nozzle and the outer wall of the upper end of the axial sleeve to form a high-pressure air chamber, and the high-pressure air chamber is provided with an air inlet joint for connecting the air outlet of the pneumatic energy distributor; the area where the mixed-phase flow nozzle is located on the upper part of the axial sleeve is, from bottom to top, a mixed flow negative pressure zone, a multiphase flow mixed flow lifting zone and a diffusion flow outlet, wherein the mixed flow negative pressure zone and the high-pressure air chamber are connected by a gap channel; the lower end of the axial sleeve is fixedly connected to the slurry inlet pipe, and a slurry inlet channel is formed inside the slurry inlet pipe and the axial sleeve.

[0009] In the above solution, the pulp inlet pipe is a trumpet structure that is thicker at the bottom and thinner at the top, and the diameter D of the upper end of the pulp inlet pipe is equal to the inner diameter of the shaft sleeve.

[0010] In the above scheme, the diameter D of the upper end of the slurry inlet pipe must satisfy formula (1):

[0011] D≤ (1)

[0012] Where Q m is the slurry design flow rate, which is the advance design value; V is the increased flow rate.

[0013] In the above scheme, the flow rate V is calculated according to formula (2):

[0014] V>4ω max (2)

[0015] Where, ω maxis the maximum value of the slurry particle settling velocity ω, and the slurry particle settling velocity ω is calculated according to formula (5):

[0016] (5)

[0017] Where, , Re is the Reynolds coefficient, , ρ s is the density of mud and sand particles, ρ is the fluid density, d is the spherical diameter of mud and sand particles, is the kinematic viscosity coefficient of the liquid.

[0018] In the above solution, the inner diameter of the mixed flow negative pressure zone of the mixed-phase flow nozzle gradually decreases from bottom to top, the inner diameter of the multiphase flow mixed flow lifting zone remains unchanged from bottom to top, and the inner diameter of the diffusion flow outlet gradually expands from bottom to top.

[0019] In the above solution, the upper end and the lower end of the shaft sleeve are fixedly connected to the mixed-phase flow nozzle and the slurry inlet pipe respectively through threaded connection.

[0020] In the above solution, a discharge port is provided at the bottom end of the cylinder of the homogenizing reactor, and the discharge port is connected to a slurry discharge pipe, and an electromagnetic control valve is provided on the slurry discharge pipe.

[0021] In the above solution, the mixed-phase flow mixing nozzle is installed on the fixed bracket through a directional locking hinge, which can adjust the angle of the mixed-phase flow mixing nozzle and lock it; multiple mixed-phase flow mixing nozzles are evenly arranged along the circumference of the fixed bracket.

[0022] In the above solution, the pneumatic energy distributor is fixed by a pipe clamp device provided on the fixing bracket.

[0023] Correspondingly, the present invention also proposes a high-efficiency mixing and activation system, including the above-mentioned pneumatic energy mixed-phase flow mixing device, and also including a micro-electrolysis activation device, the micro-electrolysis activation device including a plate-type micro-electrolysis electrode, a micro-electrolysis activation reaction cell and a constant current power supply; the plate-type micro-electrolysis electrode is fixed at both ends of the inner side of the micro-electrolysis activation reaction cell by insulating material, and the constant current power supply is arranged on the outside of the micro-electrolysis activation reaction cell and connected to the plate-type micro-electrolysis electrode through a wire.

[0024] In the above solution, the bottom end of the plate-type micro-electrolysis electrode is spaced a certain distance from the bottom of the micro-electrolysis activation reaction tank to ensure the normal flow and discharge of the slurry material.

[0025] The beneficial effects produced by the present invention are:

[0026] 1. The pneumatic kinetic energy mixed phase flow homogenizing device provided by the present invention uses a compressed high-pressure air jet to provide pneumatic kinetic energy, which is mixed with the mixed slurry in the limited space in the pipeline to form a relatively low-density mixed phase flow material. Under the action of continuous pneumatic thrust and buoyancy, it is quickly transmitted and ejected and diffused at high speed from the pipeline outlet, driving the slurry particles to form high-speed turbulence and mixed flow, so that the slurry particles and the activator are quickly mixed, completing the mutual conversion of pneumatic kinetic energy and mechanical kinetic energy of the mixed phase to achieve shaftless stirring and homogenizing. The high-pressure air flow mixes with the slurry to form a mixed phase flow material. When the air and the slurry mixture exchange kinetic energy, the air is mixed in the mixed phase flow as tiny compressed bubbles. With the pneumatic support energy, the multiphase mixed flow slurry is ejected at high speed from the pipeline outlet of the pneumatic kinetic energy mixed phase flow device, and the turbulence and eddy current disturbance with large stroke in the mixing barrel fully mixes the material. At the same time, the tiny compressed bubbles grow rapidly and break up to release energy to break up the sticky agglomerated particle clusters, increasing the contact area of ​​the particles, thereby achieving efficient homogenizing of the mineral particles and the activating agent.

[0027] 2. The shaftless mixing method makes the overall structure simple, without mechanical transmission and high-speed rotation structure. The mixing structure has strong corrosion resistance, which greatly reduces the failure rate when working in extreme acid and alkali and strong redox environments, improves the overall service life, and reduces the operation and maintenance costs of system equipment.

[0028] 3. After the slurry and activation agent are evenly mixed, they need to age for a period of time to fully react with the activator and mineral particles, releasing the metal minerals as free ions. This invention adds a micro-electrolysis activation device, which accelerates the activation reaction through a microcurrent electric field, releasing the metal minerals as free ions, and rapidly improving the leaching efficiency of the metal minerals. This forms an integrated system that can effectively mix and activate slurry in extreme environments, ultimately achieving high-precision extreme beneficiation of high-value metals.

[0029] 4. The high-efficiency homogeneous mixing activation system of the present invention can be applied to the high-efficiency uranium beneficiation and deep classification separation and disposal process, and can fully dissolve and leach the uranium metal elements in the fine ore particles. BRIEF DESCRIPTION OF THE DRAWINGS

[0030] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the following is a brief introduction to 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 any creative work.

[0031] Figure 1 Schematic diagram of the structure of the pneumatic kinetic energy mixed phase flow homogenizing device of the present invention;

[0032] Figure 2 yes Figure 1 A schematic structural diagram of a mixed-phase flow homogenizing injection device of a pneumatic kinetic energy mixed-phase flow homogenizing device is shown;

[0033] Figure 3 yes Figure 1 A top view of a mixed-phase flow homogenizing injection device of the pneumatic kinetic energy mixed-phase flow homogenizing device shown;

[0034] Figure 4 yes Figure 3 A schematic structural diagram of a mixed-phase flow homogenizing nozzle of a mixed-phase flow homogenizing injection device shown;

[0035] Figure 5 yes Figure 4 The structural exploded view of the mixed phase flow homogenizing nozzle shown;

[0036] Figure 6 yes Figure 4 A cross-sectional view of the structure of the mixed-phase flow homogenizing nozzle shown;

[0037] Figure 7 Schematic diagram of the structure of the high-efficiency homogeneous mixing activation system of the present invention;

[0038] Figure 8 yes Figure 7 The front view of the high-efficiency homogeneous mixing activation system is shown.

[0039] In the figure: 7. High-efficiency homogeneous mixing and activation system;

[0040] 71. Pneumatic energy mixed-phase flow homogenizing device; 711. Homogenizing reactor cylinder; 712. Mixed-phase flow homogenizing injection device; 7121. Fixed bracket; 7122. Mixed-phase flow homogenizing nozzle; 71221. Mixed-phase flow nozzle; 71222. Axis sleeve; 71223. Slurry inlet pipe; 71224. Air inlet connector; 71225. High-pressure air chamber; 71226. Mixed-flow negative pressure zone; 71227. Multiphase flow mixed-flow lifting zone; 71228. Diffusion outlet; 71229. Slurry inlet channel; 7123. Directional locking hinge; 7124. Pneumatic energy distributor; 7125. Pipe clamp device; 7126. High-pressure air hose; 7127. Air inlet; 713. Slurry discharge pipe; 714. Solenoid control valve; 715. Air inlet pipeline; 716. High-pressure air supply device;

[0041] 72. Micro-electrolysis activation device; 721. Plate-type micro-electrolysis electrode; 722. Micro-electrolysis activation reaction cell; 723. Regulated current power supply; 724. Conductor; 725. Activated slurry outlet;

[0042] 73. Automatic control system. DETAILED DESCRIPTION

[0043] In order to make the purpose, technical solutions and advantages of the present invention more clearly understood, the present invention will be further described in detail below with reference to 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 intended to limit the present invention.

[0044] It should be noted that the illustrations provided in the embodiments of the present invention are only schematic illustrations of the basic concept of the present invention. Therefore, the drawings only show components related to the present invention and are not drawn according to the number, shape and size of components in actual implementation. In actual implementation, the type, quantity and proportion of each component can be changed at will, and the component layout type may also be more complicated.

[0045] In the present invention, it should also be noted that the terms "center," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," and "outer" and the like are used to indicate positions or locations based on those shown in the accompanying drawings. These terms are intended solely to facilitate the description of the present application and to simplify the description. They are not intended to indicate or imply that the devices or components referred to must have a specific orientation, be constructed, or operate in a specific orientation. Therefore, they should not be construed as limiting the present application. Furthermore, the terms "first" and "second" are used solely for descriptive and distinguishing purposes and should not be construed as indicating or implying relative importance.

[0046] like Figure 1 As shown in FIG. 7 , a pneumatic kinetic energy mixed phase flow homogenizing device 71 provided by an embodiment of the present invention comprises a homogenizing reactor cylinder 711, a mixed phase flow homogenizing injection device 712 and a high pressure gas supply device 716. Figure 2-3As shown, the mixed-phase flow mixing injection device 712 includes a fixed bracket 7121, a mixed-phase flow mixing nozzle 7122 and a pneumatic energy distributor 7124. The fixed bracket 7121 is fixedly installed at the bottom of the mixing reactor cylinder 711, the mixed-phase flow mixing nozzle 7122 and the pneumatic energy distributor 7124 are respectively installed on the fixed bracket 7121, and the air inlet 7127 of the pneumatic energy distributor 7124 is connected to the high-pressure air supply device 716 through the air inlet pipe 715, and the air outlet of the pneumatic energy distributor 7124 is connected to the mixed-phase flow mixing nozzle 7122 through the high-pressure air duct hose 7126. High-pressure air generated by the high-pressure air supply device 716 enters the pneumatic energy distributor 7124 through the air inlet pipe 715, and then enters the mixed-phase flow homogenizing nozzle 7122. Inside the mixed-phase flow homogenizing nozzle 7122, the compressed high-pressure air jet provides pneumatic energy, which contacts and mixes with the mixed slurry in the limited space of the pipe, forming a relatively low-density mixed-phase flow material. Under the action of continuous pneumatic thrust and upward buoyancy, it is rapidly transported and ejected and diffused at high speed from the pipe outlet, driving the slurry particles to form high-speed turbulence and mixed flow, so that the slurry particles and the activator are quickly mixed, completing the mutual conversion of pneumatic kinetic energy and mechanical kinetic energy of the mixed phase to achieve shaftless stirring and homogenizing. The discharge port at the bottom end of the homogenizing reactor cylinder 711 is connected to the slurry discharge pipe 713, which is equipped with an electromagnetic control valve 714.

[0047] The mixed-phase flow homogenizing nozzle 7122 is mounted on the fixed bracket 7121 via a directional locking hinge 7123. The directional locking hinge 7123 can adjust the angle of the mixed-phase flow homogenizing nozzle 7122 and has a locking function. In this embodiment, three mixed-phase flow homogenizing nozzles 7122 are evenly arranged along the circumference of the fixed bracket 7121. The pneumatic energy distributor 7124 is fixed by a pipe clamp device 7125 provided on the fixed bracket 7121; three air supply ports are provided on the pneumatic energy distributor 7124, which are respectively connected to the three mixed-phase flow homogenizing nozzles 7122 via high-pressure air hoses 7126. The fixed bracket 7121 is fixed to the bottom of the homogenizing reactor cylinder 711 by anti-corrosion bolts or welding.

[0048] The mixed phase flow homogenizing nozzle 7122 is the core component of the pneumatic energy mixed phase flow homogenizing device 71. Figure 4-6As shown, the mixed-phase flow homogenizing nozzle 7122 includes a coaxially arranged and interconnected mixed-phase flow nozzle 71221, a shaft sleeve 71222, and a slurry inlet pipe 71223. The upper end of the shaft sleeve 71222 is fixedly connected to the mixed-phase flow nozzle 71221 via an external thread. A gap is left between the lower inner wall of the mixed-phase flow nozzle 71221 and the upper outer wall of the shaft sleeve 71222 to form a high-pressure air chamber 71225. The high-pressure air chamber 71225 is provided with an air inlet connector 71224 for connecting to the air outlet of the pneumatic energy distributor 7124. The area of ​​the mixed-phase flow nozzle 71221 located above the shaft sleeve 71222 is, from bottom to top, a mixed-phase negative pressure zone 71226, a multiphase mixed-flow lifting zone 71227, and a diffuser outlet 71228. The mixed-phase negative pressure zone 71226 and the high-pressure air chamber 71225 are connected by a gap channel. The lower end of the shaft sleeve 71222 is fixedly connected to the slurry inlet pipe 71223 through an internal thread, and the slurry inlet pipe 71223 and the interior of the shaft sleeve 71222 form a slurry inlet channel 71229.

[0049] Further optimization is carried out, the inner diameter of the mixed flow negative pressure zone 71226 of the mixed flow nozzle 71221 gradually decreases from bottom to top, which has a better compression effect on the high flow rate medium, so that the pressure in the transition zone from the mixed flow negative pressure zone 71226 to the multiphase flow mixed flow lifting zone 71227 is increased, which is conducive to the mixing of high-pressure air and slurry to form a high-speed gas-liquid-solid multiphase mixed flow material; the inner diameter of the multiphase flow mixed flow lifting zone 71227 remains unchanged from bottom to top, which increases the uniform mixing time and path of the multiphase mixed flow material, and the inner diameter of the diffusion outlet 71228 gradually expands from bottom to top, which is conducive to the high-speed injection and diffusion of the multiphase mixed flow material.

[0050] Further optimization is carried out, the slurry inlet pipe 71223 is a trumpet structure that is thicker at the bottom and thinner at the top, which is conducive to the collection and feeding of mud. The diameter D of the upper end of the slurry inlet pipe 71223 is equal to the inner diameter of the shaft sleeve 71222.

[0051] The working principle of the mixed phase flow homogenizing nozzle 7122 is:

[0052] High-pressure air enters the high-pressure air chamber 71225 from the air inlet joint 71224. The high-pressure air chamber 71225 and the mixed flow negative pressure zone 71226 are connected by a gap channel A with a smaller cross-section. The high-pressure air enters the mixed flow negative pressure zone 71226 through the gap channel A at high speed, mixes with the slurry in the chamber, and forms a gas-liquid-solid multiphase mixed flow; the compressed air initially mixes with the slurry in the form of larger bubbles, and continues to enter the multiphase flow mixed flow lifting zone 71227. At this time, the inner diameter of the tube decreases, the local pressure increases, the air and the slurry mixture exchange kinetic energy, the diameter of the compressed air bubbles decreases, and they are mixed in the mixed phase flow as tiny compressed bubbles, the density of the multiphase mixed flow decreases, and the newly formed multiphase mixed flow generates an upward lifting and squeezing force. Under the combined action of the pneumatic support kinetic energy as the main force, a higher flow rate is formed, and the compressed air continues to enter the diffusion outlet 71228 and is sprayed at high speed to diffuse into the external slurry.

[0053] At the same time, when high-pressure air flows through gap channel A at high speed and enters mixed flow negative pressure zone 71226, a certain negative pressure is formed in transition zone B at the intersection with the upper end of slurry inlet channel 71229. Under the action of the internal and external pressure difference, the slurry in slurry inlet channel 71229 is continuously lifted to participate in mixed flow and uniform mixing. Then, a large amount of mixed slurry is sucked into the circulation through slurry inlet pipe 71223. When the inlet slurry flow rate is large enough, a large amount of solid particles will be entrained for mixed flow circulation. With the pneumatic support energy, the multiphase mixed flow slurry is ejected at high speed from the outlet of the mixed phase flow mixing nozzle 7122, forming large turbulence and eddy current disturbances in the mixing reactor cylinder 711, which fully mixes the materials.

[0054] To ensure the suction, lifting, and mixing capacity and efficiency of the mixed-phase flow mixing nozzle 7122, a sufficient slurry inlet velocity is required. Given a fixed compressed air kinetic energy, the diameters of the slurry inlet channel 71229 and the slurry inlet pipe 71223 are the core of the entire structure, influencing both the overall equipment dimensions and the overall mixed flow rate and production capacity. Therefore, given a fixed total mixed flow volume, the diameter D of the slurry inlet pipe 71223 directly impacts both production capacity and the overall dimensions of the equipment components.

[0055] The diameter D parameter design of the slurry inlet pipe 71223 of the present invention is calculated using formula (1), which is:

[0056] D≤ (1)

[0057] Where Q m is the slurry design flow rate, which is a pre-designed value and is generally a value measured through actual working condition tests; V is the lift flow rate.

[0058] According to the data model design, in order to ensure that the particles in the mud can be efficiently lifted through the suction port, the negative pressure suction power must be greater than the particle sedimentation, that is, the lifting flow rate V in the pipeline must be greater than the slurry particle sedimentation velocity ω; in order to ensure that the mineral particles within a certain particle range are smoothly lifted and evenly mixed, the lifting flow rate V must be sufficient to be greater than the maximum value of the slurry particle sedimentation velocity ω max , calculated according to formula (2):

[0059] V>4ω max (2)

[0060] Based on experience and relevant basic research theories, assuming that the slurry particles are spherical, when the resistance and gravity of the particles are balanced during their descent, they descend at a constant speed. The value of the slurry particle settling velocity ω can be calculated according to formula (3):

[0061] (3)

[0062] Where Cd is the sedimentation resistance coefficient of mud and sand particles, ρ s is the density of mud and sand particles, ρ is the fluid density; d is the spherical diameter of mud and sand particles, is the acceleration due to gravity.

[0063] However, under actual working conditions, the shape of slurry particles is not a standard sphere, so further parameters need to be introduced for revision. Combining a large amount of experimental data and empirical parameters, the sedimentation resistance coefficient Cd of mud and sand particles is expressed as formula (4):

[0064] (4)

[0065] Where Re is the Reynolds coefficient.

[0066] Therefore, formula (4) is substituted into formula (3), and formula (5) is obtained through empirical parameter optimization:

[0067] (5)

[0068] Where, , , is the kinematic viscosity coefficient of the liquid. Based on empirical data, the parameter design values ​​in this embodiment are C1=13.95 and C2=1.09; μ can be determined based on experience.

[0069] According to the prototype experiment, by comparing with the stirring effect of the stirring blade, the overall effective cycle mixing time of the pneumatic kinetic energy mixed-phase flow mixing device 71 of the present invention is reduced by 50%, thereby effectively improving the mixed-phase flow mixing quality and efficiency.

[0070] like Figure 7-8As shown, an efficient homogenous mixing and activation system 7 provided by an embodiment of the present invention includes the above-mentioned pneumatic energy mixed phase flow homogenous mixing device 71, a micro-electrolysis activation device 72, and an automatic control system 73. The micro-electrolysis activation device 72 includes a plate-type micro-electrolysis electrode 721, a micro-electrolysis activation reaction cell 722 and a micro-electrolysis activation reaction cell 724. The plate-type micro-electrolysis electrode 721 is fixed to the inner ends of the micro-electrolysis activation reaction cell 722 by insulating material, and the constant current power supply 723 is arranged on the outer side of the micro-electrolysis activation reaction cell 722 and connected to the plate-type micro-electrolysis electrode 721 by a wire to form a stable electric field. According to the summary of the working condition experimental verification, the micro-electric field voltage is set to 36V. An activated ore slurry outlet 725 is provided at the bottom of the micro-electrolysis activation reaction cell 722. The bottom end of the plate-type micro-electrolysis electrode 721 is separated from the bottom of the micro-electrolysis activation reaction cell 722 by a certain distance to ensure the normal flow and discharge of the ore slurry material.

[0071] The working principle of the efficient homogeneous mixing activation system 7 of the present invention is:

[0072] The homogenized ore pulp and activating agent after crushing and grinding are respectively added into the feed port at the upper end of the mixing reactor cylinder 711 of the pneumatic kinetic energy mixed phase flow mixing device 71 by pipeline transportation until the liquid level of the mixed slurry reaches one-third of the total volume. After the slurry fully submerges the mixed phase flow mixing injection device 712, the automatic control system 73 starts the high-pressure air supply device 716 to supply air.

[0073] The mixed-phase flow homogenizing injection device 712 uses a compressed high-pressure air jet to provide pneumatic energy, which contacts and mixes with the mixed slurry within the confined space of the pipeline, forming a relatively low-density mixed-phase flow material. Under the action of continuous pneumatic thrust and upward buoyancy, it is rapidly transported and ejected and diffused at high speed from the pipeline outlet, driving the slurry particles to form high-speed turbulence and mixed flow, allowing the slurry particles to quickly mix with the activator, achieving shaftless stirring and homogenizing. At the same time, a certain negative pressure is formed at the intersection of the high-pressure air injection port and the lower end feed pipe. Due to the internal and external pressure difference, the slurry in the pipe is continuously lifted to participate in the mixed flow and homogenizing. As the high-pressure air flow mixes with the slurry to form a mixed-phase flow material, the air and the slurry mixture exchange kinetic energy, and the air is mixed in the mixed-phase flow as tiny compressed bubbles. With the pneumatic support energy, the multiphase mixed flow slurry is ejected at high speed from the pneumatic kinetic energy mixed-phase flow device pipeline outlet, forming large turbulence and vortex disturbances within the homogenizing reactor cylinder 711, fully mixing the materials. At the same time, tiny compressed bubbles grow and break up rapidly, releasing energy to break up clumped particles, increasing the contact area of ​​the particles and achieving efficient and uniform mixing of the mineral particles and the activating agent. When the flow rate in the pipe is high enough, the slurry entering the feed suction port will carry particles and heavier mud and sand into the mixed flow circulation, preventing solid particles from settling and clogging due to excessive sedimentation.

[0074] After the ore pulp and the activation agent are evenly mixed, they need to undergo a certain period of aging to allow the activator to fully react with the mineral particles and to extract the metal minerals in a free ionic state. The present invention adds a micro-electrolysis activation device 72, which accelerates the activation reaction through a micro-current electric field and quickly improves the leaching efficiency of the metal minerals. After the ore pulp mixture is evenly mixed in the pneumatic energy mixed phase flow evenly mixing device 71, the electromagnetic control valve 714 is started, the valve is opened, and the ore pulp mixture enters the micro-electrolysis activation device 72 through the slurry discharge pipe 713. When the evenly mixed ore pulp material fills the micro-electrolysis activation reaction tank 722, the activation reaction is accelerated under the micro-current electric field, the leaching efficiency of the metal minerals is quickly improved, and the metal minerals are extracted in a free ionic state. Finally, the activated mixture is discharged through the activation slurry discharge port and enters the next process flow (solid-liquid separation process), ultimately achieving high-value metal high-precision extreme mineral processing.

[0075] The high-efficiency homogeneous mixing and activation system 7 of the present invention improves the turbulence and mixing dynamics between the ore pulp and the activation agent, strengthens the turbulence and eddy current disturbances of the mixed slurry, increases the micro-electrolysis efficiency of the activation reaction, and improves the efficiency of homogeneous mixing, activation, and chemical leaching. It is an integrated system that provides high-efficiency homogeneous mixing and activation of ore pulp under extreme environments. The high-efficiency homogeneous mixing and activation system 7 of the present invention can be applied to high-efficiency uranium beneficiation and deep classification and separation disposal processes, fully dissolving and leaching the uranium metal elements in fine ore particles.

[0076] 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, or 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.

[0077] The size of the serial numbers of the steps in the above embodiments 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 embodiments of the present application.

[0078] It should be understood that those skilled in the art can make improvements or changes based on the above description, and all such improvements and changes should fall within the scope of protection of the appended claims of the present invention.

Claims

1. A pneumatic kinetic energy mixed phase flow homogenizing device, characterized in that: It includes a homogenous mixing reactor cylinder, a mixed-phase flow homogenous mixing injection device and a high-pressure air supply device; the mixed-phase flow homogenous mixing injection device includes a fixed bracket, a mixed-phase flow homogenous mixing nozzle and a pneumatic energy distributor, the fixed bracket is fixedly installed at the bottom of the homogenous mixing reactor cylinder, the mixed-phase flow homogenous mixing nozzle and the pneumatic energy distributor are respectively installed on the fixed bracket, the air inlet of the pneumatic energy distributor is connected to the high-pressure air supply device, the air outlet of the pneumatic energy distributor is connected to the mixed-phase flow homogenous mixing nozzle, and the high-pressure air supply device generates High-pressure gas enters the mixed-phase flow homogenizing nozzle through the pneumatic energy distributor. In the mixed-phase flow homogenizing nozzle, the high-pressure gas jet provides pneumatic energy, which contacts and mixes with the mixed slurry in the limited space in the pipeline, forming a relatively low-density mixed-phase flow material. Under the action of continuous pneumatic thrust and buoyancy, it is quickly transported and ejected and diffused at high speed from the pipeline outlet, driving the slurry particles to form high-speed turbulence and mixed flow, so that the slurry particles and the activator are quickly mixed, completing the mutual conversion of pneumatic kinetic energy and mechanical kinetic energy of the mixed phase to achieve shaftless stirring and homogenizing; The mixed-phase flow homogenizing nozzle includes a mixed-phase flow nozzle, an axial sleeve and a slurry inlet pipe which are coaxially arranged and interconnected; the upper end of the axial sleeve is fixedly connected to the mixed-phase flow nozzle, and a gap is left between the inner wall of the lower end of the mixed-phase flow nozzle and the outer wall of the upper end of the axial sleeve to form a high-pressure air chamber, and the high-pressure air chamber is provided with an air inlet joint for connecting the air outlet of the pneumatic energy distributor; the area where the mixed-phase flow nozzle is located on the upper part of the axial sleeve is, from bottom to top, a mixed flow negative pressure zone, a multiphase flow mixed flow lifting zone and a diffusion flow outlet, wherein the mixed flow negative pressure zone is connected to the high-pressure air chamber by a gap channel, the inner diameter of the mixed flow negative pressure zone gradually decreases from bottom to top, the inner diameter of the multiphase flow mixed flow lifting zone remains unchanged from bottom to top, and the inner diameter of the diffusion flow outlet gradually expands from bottom to top; the lower end of the axial sleeve is fixedly connected to the slurry inlet pipe, and a slurry inlet channel is formed inside the slurry inlet pipe and the axial sleeve, and the slurry inlet pipe is a trumpet structure with a thick bottom and a thin top, and the diameter D of the upper end of the slurry inlet pipe is equal to the inner diameter of the axial sleeve.

2. The pneumatic kinetic energy mixed phase flow homogenizing device according to claim 1, characterized in that: The diameter D of the upper end of the slurry inlet pipe must satisfy formula (1): D≤ （1） Where Q m is the slurry design flow rate, which is the advance design value; V is the increased flow rate.

3. The pneumatic kinetic energy mixed phase flow homogenizing device according to claim 2, characterized in that: The flow rate V is calculated according to formula (2): V>4ω max (2) Where, ω max is the maximum value of the slurry particle settling velocity ω, and the slurry particle settling velocity ω is calculated according to formula (5): （5） Where, , Re is the Reynolds coefficient, , ρ s is the density of mud and sand particles, ρ is the fluid density, d is the spherical diameter of mud and sand particles, is the kinematic viscosity coefficient of the liquid.

4. The pneumatic kinetic energy mixed phase flow homogenizing device according to claim 1, characterized in that: The upper end and the lower end of the shaft sleeve are fixedly connected to the mixed-phase flow nozzle and the slurry inlet pipe respectively through threaded connection.

5. The pneumatic kinetic energy mixed phase flow homogenizing device according to claim 1, characterized in that: The bottom end of the homogenizing reactor cylinder is provided with a discharge port, the discharge port is connected to a slurry discharge pipe, and an electromagnetic control valve is provided on the slurry discharge pipe.

6. The pneumatic kinetic energy mixed phase flow homogenizing device according to claim 1, characterized in that: The mixed-phase flow mixing nozzle is installed on the fixed bracket through a directional locking hinge, which can adjust the angle of the mixed-phase flow mixing nozzle and can be locked; the mixed-phase flow mixing nozzle is evenly arranged in multiples along the circumference of the fixed bracket.

7. The pneumatic kinetic energy mixed phase flow homogenizing device according to claim 1, characterized in that: The pneumatic energy distributor is fixed by a pipe clamp device provided on the fixing bracket.

8. A high-efficiency homogeneous mixing activation system, characterized in that: It includes the pneumatic energy mixed-phase flow mixing device as described in any one of claims 1 to 7, and also includes a micro-electrolysis activation device, the micro-electrolysis activation device includes a plate-type micro-electrolysis electrode, a micro-electrolysis activation reaction cell and a constant-current power supply; the plate-type micro-electrolysis electrode is fixed at both ends of the inner side of the micro-electrolysis activation reaction cell by insulating material, and the constant-current power supply is arranged on the outside of the micro-electrolysis activation reaction cell and connected to the plate-type micro-electrolysis electrode through a wire.

9. The high-efficiency homogeneous mixing activation system according to claim 8, characterized in that: The bottom end of the plate-type micro-electrolysis electrode is spaced a certain distance from the bottom of the micro-electrolysis activation reaction tank to ensure normal flow and discharge of the slurry material.

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