A fine particle mineral reinforced mixed slurry device and method

Abstract

The present application relates to a kind of fine particle mineral reinforced mixed pulp equipment and method, belong to mineral flotation mixing pulp technical field, solve the problem that the high dispersion and collision between fine particle mineral and flotation reagent cannot be met due to the single structure design of mixing pulp equipment in prior art.The present application includes barrel, dosing mechanism and wheel-paddle coupling pulp conditioning mechanism, the dosing mechanism is arranged on the outside of the barrel, the wheel-paddle coupling pulp conditioning mechanism is used for the reinforced mixing of ore pulp in the barrel, the inner chamber of the barrel is divided into feed distribution area, opposite impact area and shear collision area from bottom to top.The present application is based on barrel bottom horizontal and top vertical shear turbulent collision, realizes the swirl shear of ore pulp and dosing agent in the top impeller area in the area between impeller propulsion paddle secondary convection collision reinforcement, enhances the dispersion, collision and adhesion of fine particle mineral and reagent, shortens the pulp conditioning time, improves pulp conditioning efficiency.

Description

Technical Field

[0001] This invention relates to the field of mineral flotation mixing and slurry preparation technology, and in particular to a fine-grained mineral enhanced mixing and slurry preparation equipment and method. Background Technology

[0002] Flotation is the most economical and efficient interface separation technology suitable for coal and mineral resources, and it has a significant impact on the large-scale recovery and utilization of fine-grained low-grade coal and valuable mineral resources. The general flotation process is based on the differences in the surface properties of minerals. Particles with strong hydrophobic surfaces easily adhere to air bubbles and float to the surface as concentrate, while more hydrophilic gangue mineral particles remain in the slurry and are discharged as tailings. With large-scale mechanized mining, the reserves of high-quality coal and ore are decreasing, while mineral liberation methods such as crushing and grinding of low-quality coal slime, while releasing clean coal, also increase the content of fine-grained coal slime. Therefore, optimizing and adapting fine-grained flotation equipment, simplifying the flotation process, and improving the efficiency of the separation process are effective measures to achieve efficient separation of fine-grained coal slime.

[0003] Slurry conditioning is a crucial step in the flotation process. Its core objective is to reduce the amount of fine mud on the surface of mineral particles, enhance the dispersibility, collision, and adhesion between mineral particles and flotation reagents, and amplify the differences in surface properties between different mineral particles, thereby promoting efficient separation. Efficient slurry conditioning is a prerequisite for the effective flotation of fine and micro-fine minerals. Due to their low density and high specific surface area, micro-fine minerals easily adhere to target mineral particles during flotation, which weakens the interaction between the target mineral and the flotation reagents and affects their surface properties. Traditional mixing and conditioning equipment and methods, mainly based on a single structural design, often fail to meet the technical requirements for the high degree of dispersion and collision between micro-fine minerals and flotation reagents. Therefore, there is an urgent need to develop a high-powered mixing and shearing device suitable for the flotation of fine-grained minerals. Summary of the Invention

[0004] Based on the above analysis, the present invention aims to provide a fine-grained mineral enhanced mixing and slurry preparation device and method to solve the problem that existing mixing and slurry preparation devices cannot meet the high dispersion and collision requirements between fine-grained minerals and flotation reagents due to their single structural design.

[0005] On one hand, the present invention provides a fine-grained mineral enhanced mixing and slurry conditioning device, including a tank body, a dosing mechanism and a wheel-paddle coupled slurry conditioning mechanism. The dosing mechanism is located on the outside of the tank body, and the wheel-paddle coupled slurry conditioning mechanism is used for enhanced mixing and slurry conditioning of the mineral slurry in the tank body. The inner cavity of the tank body is divided into a feed distribution zone, an opposing impact zone and a shearing impact zone from bottom to top.

[0006] Furthermore, it also includes a feeding mechanism, which includes a feeding distributor. The barrel body includes a cylindrical barrel and an inverted conical barrel located below the cylindrical barrel. The feeding distributor is located inside the inverted conical barrel.

[0007] Furthermore, the feeding mechanism also includes a slurry jet pipe, one end of which is a slurry inlet, and the other end enters from the bottom of the inverted conical barrel and connects to the feeding distributor.

[0008] Furthermore, the barrel body also includes a partition plate, which is disposed at the connection between the cylindrical barrel and the inverted conical barrel, and is used to separate the inner cavities of the cylindrical barrel and the inverted conical barrel.

[0009] Furthermore, the barrel body also includes baffles, which are disposed inside the cylindrical barrel. Multiple baffles are provided, and the multiple baffles are evenly distributed along the inner circumference of the cylindrical barrel.

[0010] Furthermore, the feeding mechanism also includes a first centrifugal pump and a first flow meter disposed on the slurry jet pipe.

[0011] Furthermore, the cylindrical barrel is provided with a slurry outlet and a slurry extraction outlet, the slurry outlet being connected to a slurry discharge pipe, and the slurry extraction outlet being connected to a slurry extraction pipe.

[0012] Furthermore, the slurry extraction pipe is connected to the slurry jet pipe.

[0013] Furthermore, the impeller-coupled slurry conditioning mechanism includes an impeller slurry conditioning assembly and a propeller slurry conditioning assembly. The impeller slurry conditioning assembly is connected to the upper part of the cylindrical barrel, and the propeller slurry conditioning assembly is connected to the lower part of the cylindrical barrel.

[0014] On the other hand, the present invention provides an enhanced mixing and slurry preparation method, which uses the above-mentioned enhanced mixing and slurry preparation equipment to enhance the mixing and slurry preparation of fine-grained minerals.

[0015] Compared with the prior art, the present invention can achieve at least one of the following beneficial effects:

[0016] (1) The present invention is a two-stage coupled and enhanced stirring structure with top vertical shearing and bottom opposing impact. One of the feeding distribution structures is based on a spoke distributor to achieve the initial uniform and rapid dispersion of slurry feed and emulsifying agent in the mixing tank. The second-stage primary collision slurry conditioning structure employs horizontally submerged propeller blades placed in four opposing directions. This achieves close coordination between the opposing flow impact of the propellers and the collision of adjacent shear flows, enhancing the suspension, dispersion, collision, and adhesion of fine-grained mineral particles and emulsifying agents in the slurry after entering the mixing tank. Simultaneously, it promotes the stripping of high-ash fine mud covering the mineral surface, effectively suppressing the impact of mud formation on agent selectivity and achieving effective contact between the slurry and agents. The third-stage secondary collision slurry conditioning structure is based on horizontal shear turbulent collision at the bottom and vertical at the top of the tank. This achieves enhanced vortex shearing of the slurry and the introduced agents at the tank wall in the top impeller area, as well as secondary convection collision enhancement between the impeller and propeller areas. This further enhances the dispersion, collision, and adhesion of fine-grained minerals and agents, shortens the slurry conditioning time, and improves slurry conditioning efficiency, providing a foundation for the fine-grained upgrading and efficient utilization of low-quality coal slime flotation.

[0017] (2) After being distributed by the agent distribution controller, the agent of the present invention enters the dosing pipe of the split array and the slurry jet pipe respectively. It can adapt to the changes in slurry properties and flow field caused by different stirring impeller and propeller speed, structure and feed properties, realize the rational distribution of agent dosage in the spatial area, avoid the problem of increased agent consumption due to poor slurry conditioning effect, enhance the full dispersion of mineral particles and agents and the interaction of collision and adhesion, reduce agent consumption, reduce slurry conditioning cost, and realize cost reduction and efficiency improvement in the slurry conditioning stage from the agent perspective. The agent split feeding of the bottom jet-bucket wall coupling meets the functional needs of different areas in the slurry conditioning process while reducing the energy consumption of the stirring process and improving the agent dispersion efficiency.

[0018] (3) The impeller slurry conditioning assembly of the present invention includes a vertical stirring impeller and a propulsion slurry conditioning assembly includes a horizontal four-sided opposed propulsion blade. The vertical axial stirring impeller combined with the horizontal opposed propulsion blade realizes flexible control of the flow field distribution in space, reduces the adverse effect of the flow motion of fine minerals around the fine mud stripping, and further enhances the dispersion, collision and adhesion between fine minerals and reagents. The stirring impeller and the propulsion blade are connected to the electrically controlled telescopic rod. By controlling the electrically controlled telescopic rod, the spatial position of the stirring impeller and the propulsion blade can be adjusted. At the same time, the rotation speed of each part of the impeller can be adjusted to optimize the turbulence distribution of the flow field, so as to adapt to the current feed slurry properties and on-site production needs. This helps to improve the system flexibility and accuracy, and avoids the impact of the non-uniform dispersion of the feed slurry and reagents in space caused by an unreasonable flow field environment on actual production.

[0019] (4) The structured zoning design of this invention improves the energy utilization rate of the mixing process and is more suitable for the discontinuous changes in material properties during actual production. The feed distribution structure zone ensures the orderly and uniform rise and dispersion of the feed and emulsifying agent at the bottom of the mixing tank, which is the initial stage for processing low-quality fine-grained and difficult-to-adjust slurry mineral particles; the primary collision slurry conditioning structure zone realizes the initial, rapid suspension dispersion, collision and adhesion of the uniformly fed fine-grained mineral feed and emulsifying agent in space, which is the core stage for processing low-quality fine-grained and difficult-to-adjust slurry mineral particles; the secondary collision slurry conditioning structure zone realizes the radial and axial binary collision enhancement of the initial slurry with the ring-shaped feed agent on the tank wall during the rising process, shortening the slurry conditioning and slurry transportation time, which is the final stage for processing low-quality fine-grained and difficult-to-adjust slurry mineral particles. At the same time, the structured design also facilitates the replacement and maintenance of key internal components of the equipment, improving the service life of the equipment.

[0020] In this invention, the above-described technical solutions can be combined with each other to achieve more preferred combinations. Other features and advantages of this invention will be set forth in the following description, and some advantages may become apparent from the description or be learned by practicing the invention. The objects and other advantages of this invention can be realized and obtained from what is particularly pointed out in the description and drawings. Attached Figure Description

[0021] The accompanying drawings are for illustrative purposes only and are not intended to limit the invention. Throughout the drawings, the same reference numerals denote the same parts.

[0022] Figure 1 This is a schematic diagram of the structure of a fine-grained mineral-enhanced mixing and slurry preparation device according to a specific embodiment;

[0023] Figure 2 This is a schematic diagram of the connection structure between the shunt array dosing pipe and the tank body in a specific embodiment;

[0024] Figure 3 This is a schematic diagram of the connection structure of the orifice plate, the inverted cone, and the slurry jet pipe in a specific embodiment.

[0025] Figure label:

[0026] 100-Barrel body; 101-Cylindrical barrel; 102-Inverted conical barrel; 103-Barrel lid; 104-Clean water replenishment pipe; 105-Slurry outlet; 106-Slurry extraction port; 107-Emergency discharge port; 108-Slurry discharge pipe; 109-Slurry extraction pipe; 110-Divider plate; 111-Inlet hole; 112-Distribution channel; 113-Baffle; 114-Support; 115-Inlet distribution area; 116-Opposing impact zone; 117-Shear collision zone;

[0027] 200 - Dosing mechanism; 201 - Flow-dividing array dosing pipe; 202 - Dosing pipe diverter; 203 - Main dosing pipe; 204 - First dosing branch pipe; 205 - Second dosing branch pipe; 206 - Chemical distribution controller; 207 - Collector dosing port; 208 - Foaming agent dosing port; 209 - Flow-dividing dosing pipe; 210 - Second centrifugal pump; 211 - Second flow meter;

[0028] 300-Paddle-driven slurry conditioning mechanism; 301-Impeller slurry conditioning assembly; 302-Propeller slurry conditioning assembly; 303-First motor; 304-First belt drive mechanism; 305-First electrically controlled telescopic rod; 306-Agitator shaft; 307-Agitator impeller; 308-First controller; 309-Second motor; 310-Second belt drive mechanism; 311-Second electrically controlled telescopic rod; 312-Propeller blade; 313-Second controller;

[0029] 400 - Feeding mechanism; 401 - Feeding distributor; 402 - Slurry jet pipe; 403 - Slurry inlet; 404 - First centrifugal pump; 405 - First flow meter. Detailed Implementation

[0030] The preferred embodiments of the present invention will now be described in detail with reference to the accompanying drawings, which constitute a part of the present invention and are used together with the embodiments of the present invention to illustrate the principles of the present invention, but are not intended to limit the scope of the present invention.

[0031] Example 1

[0032] A specific embodiment of the present invention, such as Figure 1 As shown, a fine-grained mineral enhanced mixing and conditioning equipment is disclosed, including a tank 100, a dosing mechanism 200 and a paddle-coupled conditioning mechanism 300. The dosing mechanism 200 is located on the outside of the tank 100 and is used to add chemicals into the tank 100. The paddle-coupled conditioning mechanism 300 is used for enhanced mixing and conditioning of the mineral slurry in the tank 100.

[0033] like Figure 1 As shown, the barrel body 100 includes a cylindrical barrel 101, an inverted conical barrel 102, and a barrel lid 103. The cylindrical barrel 101 is disposed above the inverted conical barrel 102. Exemplarily, the cylindrical barrel 101 and the inverted conical barrel 102 are welded together. Preferably, the cylindrical barrel 101 and the inverted conical barrel 102 are concentrically arranged. The height ratio of the cylindrical barrel 101 to the inverted conical barrel 102 is generally 4:1 to 6:1, preferably 5:1. The barrel lid 103 covers the top of the cylindrical barrel 101.

[0034] In order to fill the cylindrical tank 101 with clean water, such as Figure 1As shown, the tank body 100 also includes a clean water supply pipe 104, one end of which is located above the tank lid 103, and the other end passes through the tank lid 103 and is located inside the cylindrical tank 101. In order to control the on / off of the clean water supply pipe 104, a first solenoid valve is provided on the clean water supply pipe 104.

[0035] Considering the discharge and recycling of the slurry, such as Figure 1 As shown, the cylindrical tank 101 is also equipped with a slurry outlet 105, a slurry extraction outlet 106, and an emergency discharge outlet 107. The emergency discharge outlet 107 is located at the bottom of the cylindrical tank 101, at the junction of the cylindrical tank 101 and the inverted conical tank 102. The slurry outlet 105 and the slurry extraction outlet 106 are both located at the upper part of the cylindrical tank 101. Preferably, the slurry outlet 105 and the slurry extraction outlet 106 are at the same height. Figure 1 and Figure 2 As shown, the slurry outlet 105 is connected to the slurry outlet pipe 108, and the slurry extraction outlet 106 is connected to the slurry extraction pipe 109. The prepared slurry is discharged from the slurry outlet 105, and the slurry extracted from the slurry extraction outlet 106 re-enters the cylindrical tank 101 for circulation and mixing. Understandably, a second solenoid valve, a third solenoid valve, and a fourth solenoid valve are provided at the slurry outlet 105, the slurry extraction outlet 106, and the emergency discharge outlet 107 to control the opening and closing of the corresponding openings.

[0036] In order to distribute the slurry into the cylindrical bucket 101, such as Figure 1 As shown, the enhanced mixing and slurry preparation equipment also includes a feeding mechanism 400, which includes a feeding distributor 401 and a slurry jet pipe 402. The feeding distributor 401 is located inside the inverted conical drum 102. One end of the slurry jet pipe 402 is a slurry inlet 403, and the other end enters from the bottom of the inverted conical drum 102 and connects to the feeding distributor 401. The slurry enters the slurry jet pipe 402 from the slurry inlet 403 and is then evenly distributed into the cylindrical drum 101 by the feeding distributor 401. The slurry extraction pipe 109 is connected to the slurry jet pipe 402. The slurry extracted from the cylindrical drum 101 enters the slurry jet pipe 402 through the slurry extraction pipe 109 and is then circulated into the cylindrical drum 101 through the feeding distributor 401. Understandably, a fifth solenoid valve is provided at the slurry inlet 403, and a sixth solenoid valve is provided on the slurry jet pipe 402, to control the opening and closing of the slurry inlet 403 and the slurry jet pipe 402.

[0037] To monitor the flow rate of the slurry and provide jet power for the slurry, such as Figure 1 As shown, the feeding mechanism 400 also includes a first centrifugal pump 404 and a first flow meter 405. The first centrifugal pump 404 and the first flow meter 405 are both installed on the slurry jet pipe 402 and are located downstream of the connection between the slurry extraction pipe 109 and the slurry jet pipe 402.

[0038] like Figure 1 and Figure 3 As shown, a partition plate 110 is provided at the junction of the cylindrical barrel 101 and the inverted conical barrel 102. The partition plate 110 is horizontally positioned at the bottom of the cylindrical barrel 101, separating the inner cavity of the cylindrical barrel 101 and the inner cavity of the inverted conical barrel 102. The partition plate 110 has spoke-shaped feed holes 111, typically 6 to 12 spokes, preferably 8. Each spoke typically has 6 to 12 feed holes 111, preferably 8. The feed distributor 401 is connected to the feed holes 111 through a distribution channel 112, with each distribution channel 112 corresponding to a feed hole 111. In this embodiment, the feed distributor 401, along with the radial distribution channels 112 and feed holes 111, evenly distributes the slurry into the cylindrical barrel 101.

[0039] To enhance the shear force on the slurry, such as Figure 1 As shown, the barrel body 100 also includes baffles 113, which are disposed inside the cylindrical barrel 101. Multiple baffles 113 are provided, and the multiple baffles 113 are evenly distributed along the inner circumference of the cylindrical barrel 101. Preferably, there are 4 baffles 113.

[0040] like Figure 1 As shown, the dosing mechanism 200 includes a dosing pipe array 201, a dosing pipe splitter 202, a main dosing pipe 203, a first dosing branch pipe 204, a second dosing branch pipe 205, and a reagent distribution controller 206. One end of the main dosing pipe 203 is connected to the reagent distribution controller 206, and one end of the main dosing pipe 203 is provided with a collector dosing port 207 and a frother dosing port 208. One end of the first dosing branch pipe 204 is connected to the reagent distribution controller 206, and the other end is connected to the dosing pipe splitter 202. One end of the second dosing branch pipe 205 is connected to the reagent distribution controller 206, and the other end is connected to the slurry jet pipe 402. The dosing pipe array 201 is connected to the dosing pipe splitter 202. Understandably, the main dosing pipe 203 and the second dosing branch pipe 205 are respectively provided with a seventh solenoid valve and an eighth solenoid valve.

[0041] like Figure 1 As shown, the dosing array 201 includes multiple dosing pipes 209. One end of each dosing pipe 209 is connected to a dosing pipe distributor 202, and the other end communicates with the inner cavity of a cylindrical tank 101. The connection points between the dosing pipes 209 and the cylindrical tank 101 are evenly distributed along the circumference of the cylindrical tank 101. There are typically 4-12 dosing pipes 209, preferably 8. To control the drug delivery to each dosing pipe 209, a ninth solenoid valve is provided on each dosing pipe 209.

[0042] To monitor the dosage, such as Figure 1As shown, the dosing mechanism 200 also includes a second centrifugal pump 210 and a second flow meter 211, both of which are mounted on the first dosing branch pipe 204.

[0043] like Figure 1 As shown, the impeller-coupled slurry conditioning mechanism 300 includes an impeller slurry conditioning assembly 301 and a propeller slurry conditioning assembly 302. The impeller slurry conditioning assembly 301 is connected to the upper part of the cylindrical tank 101, and the propeller slurry conditioning assembly 302 is connected to the lower part of the cylindrical tank 101. Multiple propeller slurry conditioning assemblies 302 are provided, arranged along the circumferential sidewall of the cylindrical tank 101. Preferably, four propeller slurry conditioning assemblies 302 are provided, arranged in pairs facing each other. By providing the impeller slurry conditioning assembly 301 at the top of the cylindrical tank 101 and the propeller slurry conditioning assembly 302 at the bottom of the cylindrical tank 101, a two-stage coupled and enhanced stirring structure with a top vertical shearing and bottom opposing impact is formed to meet the functional requirements of the slurry conditioning process.

[0044] like Figure 1 As shown, the impeller slurry preparation assembly 301 includes a first motor 303, a first belt drive mechanism 304, a first electrically controlled telescopic rod 305, and a stirring shaft 306. The first motor 303 is mounted on the bucket cover 103. The upper end of the first electrically controlled telescopic rod 305 is connected to the first motor 303 via the first belt drive mechanism 304. The lower end of the first electrically controlled telescopic rod 305 passes through the bucket cover 103 and is connected to the upper end of the stirring shaft 306. The lower end of the stirring shaft 306 is equipped with a stirring impeller 307. The number of stirring impellers 307 is generally more than the number of baffles 113 by 2-6, preferably 4. The stirring impellers 307 are generally straight-blade, folded-blade, or spiral-blade, preferably straight-blade. The lower end of the first electrically controlled telescopic rod 305 can extend and retract, thereby driving the stirring shaft 306 and the stirring impellers 307 to move up and down. Understandably, the impeller pitch adjustment assembly 301 also includes a first controller 308, which is used to control the extension and retraction of the first electrically controlled telescopic rod 305.

[0045] like Figure 1 As shown, the propulsion adjustment assembly 302 includes a second motor 309, a second belt drive mechanism 310, a second electrically controlled telescopic rod 311, a propulsion blade 312, and a second controller 313. The second motor 309 is mounted on a bracket 114, which is connected to a cylindrical barrel 101. One end of the second electrically controlled telescopic rod 311 is connected to the second belt drive mechanism 310, and the other end passes through the barrel wall of the cylindrical barrel 101 and is connected to the propulsion blade 312 located inside the cylindrical barrel 101. The second motor 309 drives the second electrically controlled telescopic rod 311 to rotate, thereby driving the propulsion blade 312 to rotate. The second controller 313 controls the extension and retraction of the second electrically controlled telescopic rod 311, thereby driving the propulsion blade 312 away from or closer to the axis of the cylindrical barrel 101.

[0046] In this embodiment, the vertical distance between the lower edge of the stirring impeller 307 and the upper edge of the propulsion blade 312 is 1-5cm, preferably 3cm. The spacing between the opposing propulsion blades 312 is generally 10-30cm, preferably 20cm. On the one hand, this collaboratively constructs a flow field environment of opposing impact-shear collision coupling, and on the other hand, it makes full use of the space of the barrel 100 to reduce stirring power consumption and achieve cost reduction and efficiency improvement.

[0047] It is worth noting that the connection between the diversion dosing pipe 209 and the cylindrical barrel 101 is located between the lower edge of the stirring impeller 307 and the upper edge of the propeller blade 312, so that the reagent entering from the diversion array dosing pipe 201 directly collides and shears with the slurry.

[0048] In this embodiment, the primary collision slurry conditioning employs horizontally oriented submersible propeller blades 312 arranged in four opposing directions. This achieves close coordination between the opposing flow impact of the propeller blades 312 and the adjacent shear flow collision, enhancing the suspension, dispersion, collision, and adhesion of fine-grained mineral particles and emulsifying agents in the slurry after entering the cylindrical tank 101. Simultaneously, it promotes the stripping of high-ash fine mud covering the mineral surface, effectively suppressing the influence of mud formation on the selectivity of the reagents and achieving effective contact between the slurry and the reagents. The secondary collision slurry conditioning is based on the horizontal shear turbulent collision at the bottom and the vertical shear turbulence collision at the top of the cylindrical tank 101. This achieves enhanced vortex shearing of the slurry and the reagents fed at the tank wall in the top impeller area, as well as secondary convection collision enhancement between the stirring impeller 307 and the propeller blades 312 area. This further enhances the dispersion, collision, and adhesion of fine-grained minerals and reagents, shortens the slurry conditioning time, and improves the slurry conditioning efficiency, providing a foundation for the fine-grained upgrading and efficient utilization of low-quality coal slime flotation.

[0049] like Figure 1 As shown, the inner cavity of the barrel 100 is divided into a feed distribution zone 115, an opposing impact zone 116, and a shear collision zone 117 from bottom to top. The feed distribution zone 115 corresponds to the inner cavity of the inverted conical barrel 102. Inside it is a spoke-type feeding structure consisting of a feed distributor 401, a partition orifice plate 110, and a distribution channel 112. The spoke-type feeding structure combined with jet emulsification circulation dosing realizes uniform feeding and rapid dispersion of slurry, which helps to disperse mineral particles and reagents in the slurry in the initial stage.

[0050] like Figure 1 As shown, the opposing impact zone 116 is provided with two opposing propulsion blades 312. The propulsion blades 312 are arranged laterally (i.e., horizontally). Through the close coordination of convective impact between opposing propulsion blades 312 and shear collision between adjacent propulsion blades 312, the effective mixing of the slurry after the initial stage is promoted and the dispersion between mineral particles and reagents in the slurry is reduced. The adverse effects of fine minerals on the stripping of fine mud due to the flow around the flow are reduced, and the dispersion, collision and adhesion of the target minerals and reagents are further enhanced.

[0051] like Figure 1 As shown, the shear collision zone 117 is equipped with a stirring shaft 306 and a stirring impeller 307. The shear collision enhancement is achieved by combining the electrically adjustable vertical impeller (the first electrically controlled telescopic rod 305 adjusts the up and down movement of the stirring impeller 307) with the shear flow collision enhancement on the upper part of the propeller blade 312. At the same time, it is coordinated with the ring-shaped array of dosing pipes 201 on the outer periphery of the cylindrical barrel 101. This realizes the remixing and shear collision of fine mineral particles and reagents in the initial slurry conditioning, and fully realizes the interaction of dispersion, collision and adhesion between the target minerals and reagents. This helps to shorten the slurry conditioning time and reduce power consumption, and provides a foundation for the intensive and efficient utilization of low-quality mineral resources.

[0052] This embodiment differs from traditional mixing and slurry preparation devices that are mainly based on a single structural design. Through a structured zoning design, it achieves adaptability of energy input during the slurry preparation process, enhances the energy utilization efficiency of the slurry preparation process, reduces power consumption, improves the material adaptability and product stability of the equipment, and avoids the impact of non-uniform changes in material properties on actual production. It is especially suitable for mixing and preparing slurry before flotation of low-quality fine-grained minerals with high ash and fine mud content.

[0053] Example 2

[0054] Another specific embodiment of the present invention discloses an enhanced mixing and slurry preparation method, which uses the enhanced mixing and slurry preparation equipment of Example 1 to enhance the mixing and slurry preparation of fine-grained minerals, including the following steps:

[0055] Step 1: Start the stirring impeller 307 and propulsion blade 312 to rotate.

[0056] Specifically, before the mixing and slurry preparation begins, the emergency discharge port 107, slurry discharge pipe 108, and slurry jet pipe 402 are closed in advance by a solenoid valve. Then, the first motor 303 and the second motor 309 are started, and the mixing impeller 307 and the propeller blade 312 on the electric telescopic rod are rotated through the belt drive mechanism.

[0057] Step 2: Add slurry and reagents into cylindrical barrel 101.

[0058] After the mixing tank stabilizes, the slurry outlet pipe 108 and the slurry jet pipe 402 are opened sequentially via the solenoid valves. Simultaneously, the dosage ratio of the jet emulsification dosing and the diversion array dosing pipe 201 is adjusted via the reagent distribution controller 206, and then the dosing pipe distributor 202 is opened. The reagents are fed into the dosing pipe distributor 202 via the first dosing branch pipe 204, and then into the cylindrical tank 101 via the diversion dosing pipe 209. The second dosing branch pipe 205 feeds the reagents into the slurry jet pipe 402, which then enters the cylindrical tank 101. The slurry is fed into the slurry jet pipe 402 from the slurry inlet 403, and then evenly fed into the cylindrical tank 101 through the array distribution channel 112 and the inlet hole 111 via the feed distributor 401.

[0059] After the slurry enters the bottom of the cylindrical tank 101 uniformly and longitudinally through the orifice plate 110, the particles and reagents are initially dispersed. Under the action of the rotating horizontal submersible propeller blades 312, opposing impacts and adjacent shear collisions are formed. When the slurry passes through the connection between the second dosing branch pipe 205 and the slurry jet pipe 402 (where a Venturi tube structure is formed), a negative pressure is formed. Under the action of pressure, the collector and frother in the second dosing branch pipe 205 are self-absorbed into the slurry and enter the tank through the feed distributor 401 in the inverted conical tank 102 through the feed hole 111 and are then suspended and dispersed.

[0060] The collectors selected are kerosene, diesel oil, and pine oil, with diesel oil being preferred; the dosage is 0.5-4 kg / t, with 0.5 kg / t being preferred; the foaming agents selected are 2-octanol, methyl isobutyl methanol, methyl pentanol, and dodecyltrimethylammonium bromide, with 2-octanol being preferred; the dosage is 0.2-2 kg / t, with 0.2 kg / t being preferred.

[0061] In this embodiment, the feed distribution structure adopts a spoke-type feed and jet emulsification-ring array dosing structure design, which improves the suspension, dispersion, collision and adhesion of mineral particles and reagents in the slurry. It is conducive to the peeling of high-ash fine mud adhering to the surface of the target mineral, avoids the influence of mudification on the selectivity of reagents, and realizes full contact between slurry and reagents. It is the basic step for treating low-quality fine-grained and difficult-to-adjust mineral particles in slurry.

[0062] Step 3: One-off impact reinforcement.

[0063] The slurry and reagents enter the opposing impact zone 116. The straight-blade propeller 312, in conjunction with the second controller 313 and the second electrically controlled telescopic rod 311, regulates the strong shearing action on the passing slurry, creating opposing shear impacts and surrounding shear collisions. Under the agitation of the propeller 312, the slurry in the opposing impact zone 116 forms a pre-mixed and conditioned slurry. Simultaneously, the vertical baffle 113 on the wall of the cylindrical tank 101 also obstructs the rotating slurry, helping to increase the turbulence of the slurry. The slurry, after enhanced shear conditioning, is propelled by the propeller 312 into the secondary shear collision zone 117.

[0064] The combined design of the four-sided opposing propulsion blades 312 in the first-stage opposing impact zone 116, along with the second controller 313 and the second electrically controlled telescopic rod 311, achieves radial and axial binary shear strengthening of the slurry in the bottom space of the cylindrical barrel 101. This reduces the adverse effects of fine-grained minerals on the stripping of fine mud due to the flow motion, and further enhances the dispersion, collision, and adhesion between mineral particles and reagents. It is a key step in treating low-quality, fine-grained, and difficult-to-adjust slurry mineral particles.

[0065] Step 4: Secondary shear collision enhancement.

[0066] The slurry entering the shear collision zone 117 is subjected to secondary shear collision enhancement by the vertical stirring impeller 307, which enables rapid processing of the initially conditioned slurry, shortens the conditioning time, and helps prevent the adverse effects of over-conditioning on subsequent flotation. It is the final step in processing low-quality fine-grained and difficult-to-condition mineral particles.

[0067] It is worth noting that, depending on the feed properties and on-site production needs, the shearing effect of the slurry can also be controlled by changing the number of vertical baffles 113 and adjusting the first electrically controlled telescopic rod 305 and the second electrically controlled telescopic rod 311. When the mineral particles are complex and contain a large amount of fine mud (difficult to float), the number of vertical baffles 113 should be increased, and the horizontal gap between the agitator impeller 307 and the propeller blade 312, as well as the distance between opposing and adjacent propeller blades 312, should be shortened to enhance the shearing and slurry conditioning effect. When the mineral particles are uniform and contain a small amount of fine mud (easy to float), the number of vertical baffles 113 can be reduced, and the horizontal gap between the agitator impeller 307 and the propeller blade 312, the distance between relative propeller blades 312, and the distance between adjacent propeller blades 312 can be appropriately increased to improve the slurry throughput and increase the equipment's processing capacity.

[0068] The above description is only a preferred embodiment of the present invention, but the scope of protection of the present invention is not limited thereto. Any changes or substitutions that can be easily conceived by those skilled in the art within the scope of the technology disclosed in the present invention should be included within the scope of protection of the present invention.

Claims

1. A fine-grained mineral-enhanced mixing and slurry preparation device, characterized in that, The system includes a tank body, a dosing mechanism, and a paddle-coupled slurry conditioning mechanism. The dosing mechanism is located on the outside of the tank body. The paddle-coupled slurry conditioning mechanism is used for enhanced mixing and conditioning of the slurry inside the tank body. The inner cavity of the tank body is divided into a feed distribution zone, an opposing impact zone, and a shear impact zone from bottom to top. The tank body includes a cylindrical tank. The paddle-coupled slurry conditioning mechanism includes an impeller slurry conditioning assembly and a propeller slurry conditioning assembly. The impeller slurry conditioning assembly is connected to the upper part of the cylindrical tank, and the propeller slurry conditioning assembly is connected to the lower part of the cylindrical tank. The impeller slurry conditioning assembly includes a first electrically controlled telescopic rod and a stirring shaft. The lower end of the stirring shaft is equipped with a stirring... The impeller has a first electrically controlled telescopic rod whose lower end can extend and retract, thereby driving the stirring shaft and stirring impeller to move up and down; the propulsion preparation assembly includes a second electrically controlled telescopic rod, a propulsion blade and a second controller. One end of the second electrically controlled telescopic rod passes through the wall of the cylindrical barrel and is connected to the propulsion blade located inside the cylindrical barrel. The second controller controls the extension and retraction of the second electrically controlled telescopic rod, thereby driving the propulsion blade away from or closer to the axis of the cylindrical barrel. The opposing impact zone is provided with two pairs of opposing propulsion blades, which are arranged laterally. The shearing collision zone is provided with a stirring shaft and a stirring impeller. The dosing mechanism includes a dosing pipe array, a dosing pipe distributor, a main dosing pipe, a first dosing branch pipe, a second dosing branch pipe, and a reagent distribution controller. One end of the main dosing pipe is connected to the reagent distribution controller. One end of the first dosing branch pipe is connected to the reagent distribution controller, and the other end is connected to the dosing pipe distributor. One end of the second dosing branch pipe is connected to the reagent distribution controller, and the other end is connected to the slurry jet pipe. The dosing pipe array includes multiple dosing pipes. One end of each dosing pipe is connected to the dosing pipe distributor, and the other end connects to the cylindrical barrel between the lower edge of the stirring impeller and the upper edge of the propeller blade. The connection points between the dosing pipes and the cylindrical barrel are evenly distributed along the circumference of the cylindrical barrel.

2. The fine-grained mineral-enhanced mixing and slurry preparation equipment according to claim 1, characterized in that, It also includes a feeding mechanism, which includes a feeding distributor, and the barrel body also includes an inverted conical barrel located below the cylindrical barrel, with the feeding distributor located inside the inverted conical barrel.

3. The fine-grained mineral-enhanced mixing and slurry preparation equipment according to claim 2, characterized in that, One end of the slurry jet pipe is the slurry inlet, and the other end enters from the bottom of the inverted conical barrel and connects to the feed distributor.

4. The fine-grained mineral-enhanced mixing and slurry preparation equipment according to claim 2, characterized in that, The barrel body also includes a partition plate, which is disposed at the connection between the cylindrical barrel and the inverted conical barrel, and is used to separate the inner cavities of the cylindrical barrel and the inverted conical barrel.

5. The fine-grained mineral-enhanced mixing and slurry preparation equipment according to claim 2, characterized in that, The barrel also includes baffles, which are disposed inside the cylindrical barrel. Multiple baffles are provided and are evenly distributed along the inner circumference of the cylindrical barrel.

6. The fine-grained mineral-enhanced mixing and slurry preparation equipment according to claim 3, characterized in that, The feeding mechanism also includes a first centrifugal pump and a first flow meter installed on the slurry jet pipe.

7. The fine-grained mineral-enhanced mixing and slurry preparation equipment according to claim 6, characterized in that, The cylindrical barrel is provided with a slurry outlet and a slurry extraction outlet. The slurry outlet is connected to a slurry discharge pipe, and the slurry extraction outlet is connected to a slurry extraction pipe.

8. The fine-grained mineral-enhanced mixing and slurry preparation equipment according to claim 7, characterized in that, The slurry extraction pipe is connected to the slurry jet pipe.

9. A method for enhancing mixing and pulp preparation, characterized in that, The slurry preparation equipment described in any one of claims 1-8 is used to enhance the mixing and preparation of fine-grained minerals.

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