Vortex flotation beneficiation apparatus based on limited space and beneficiation method

Abstract

A vortex flotation beneficiation apparatus based on limited space, said apparatus comprising a beneficiation cylinder body (10), ore inlets (11) being formed on sidewalls at the bottom of the beneficiation cylinder body (10), an ore outlet (12) being formed on the sidewall at the top of the beneficiation cylinder body (10), and the ore inlets (11) comprising at least two oppositely-arranged inlet pipes, such that mineral ore pulp enters the beneficiation cylinder body in the form of collision flow. The vortex flotation beneficiation apparatus further comprises air ducts (20) and a stirring apparatus (30), the air ducts (20) being connected to the ore inlets (11) for feeding air into the ore pulp, the stirring apparatus (30) is disposed inside of the beneficiation cylinder body (10), the stirring apparatus (30) is provided with a beneficiation impeller (31) used for stirring, and the beneficiation impeller (31) is arranged above the path of the collision flow between the inlet pipes. Strong turbulence formed by means of the collision flow and an impeller-induced high-speed stirred flow leads to highly concentrated turbulent energy, and induces generation of small-scale turbulent micro-vortexes, which enhances fine particles to break through the limitation of fluid streamlines to collide with and attach to bubbles, thus achieving efficient beneficiation using fine particles with bubbles. Also disclosed is a beneficiation method for a vortex flotation beneficiation apparatus based on limited space.

Description

A confined space eddy current flotation mineralization device and mineralization method

[0001] This application claims priority to “A vortex flotation mineralization device and mineralization method based on confined space” with application number 202311405716.5 filed on October 26, 2023, and the original accepting agency is China. Technical Field

[0002] The present invention belongs to the technical field of mineral flotation, and in particular relates to an eddy current flotation mineralization device and a mineralization method based on a confined space. Background Art

[0003] Flotation is an effective method for separating fine-grained minerals and is widely used in the energy, resources, and chemical industries. Using bubbles as a carrier, it separates useful minerals from gangue minerals in a complex gas-liquid-solid three-phase system based on differences in particle surface hydrophobicity. The mineralization of particles and bubbles is the core of the flotation process, directly determining its efficiency and capacity. This process involves three sub-processes: collision, adhesion, and desorption. In recent years, with the continued high demand and large-scale development of mineral resources, high-grade ores have become increasingly depleted, and low-grade, complex ores will become the focus of future mineral resource development and utilization. Complex composition and finely distributed particle size are common physical properties of low-grade, complex ores. Prior to separation, they require extensive crushing and dissociation to separate the different mineral components. This results in a further reduction in the particle size of the mineral material processed by flotation, with micro-fine minerals becoming the primary particle size fraction in the flotation process.

[0004] During flotation, fine-particle minerals, due to their small size and low mass, lack sufficient inertial force. They are easily affected by fluid streamlines near the bubble wall, have strong water-related properties, and are difficult to collide with and directly contact with bubbles. Furthermore, after collision, they lack sufficient kinetic energy to strengthen the liquid film between the particles and bubbles, resulting in low adhesion efficiency. Numerous theoretical studies have demonstrated the existence of a fluid scale effect in the mineralization process of mineral flotation. Specifically, stronger turbulence leads to greater turbulent dissipation and smaller turbulent eddy scales, which help force fine particles to break through fluid streamlines and increase the probability of mineralization through collision between fine particles and bubbles.

[0005] However, the strong turbulent flow field can easily worsen the static flotation separation environment of bubbles, which is not conducive to the separation process. Therefore, it is urgent to design a new type of strong turbulence collision mineralization device to replace the mineralization capture zone in the conventional flotation system, realize the module differentiation and process coordination of strong turbulence mineralization and static separation, and improve the efficiency and capacity of the flotation process of fine-particle minerals. Summary of the Invention

[0006] In order to solve the above technical problems, one of the objectives of the present invention is to provide an eddy current flotation mineralization device based on a confined space.

[0007] The present invention adopts the following technical solutions:

[0008] A vortex flotation mineralization device based on a confined space includes a mineralizer body, wherein the interior of the mineralizer body is a mineralization cylinder for mineral mineralization, characterized in that an inlet is provided on the bottom side wall of the mineralization cylinder, and an outlet is provided on the top side wall, forming a mineralization pipeline from bottom to top in the mineralization cylinder; the inlet includes at least two oppositely arranged inlet pipelines, so that gas-containing mineral slurry enters the mineralization cylinder in the form of a collision flow; the device also includes an air pipeline and a stirring device, the air pipeline is connected to the inlet and is used to supply air to the slurry, the stirring device is arranged inside the mineralization cylinder, the stirring device has a mineralization impeller for stirring, and the mineralization impeller is arranged above the collision flow path between the inlet pipelines.

[0009] Preferably, the ore inlet end of the ore inlet is arranged on a slurry distribution trough, which is a closed pipe arranged around the outer side wall of the top of the mineralization cylinder. The slurry distribution trough is connected to a vertically arranged slurry distribution pipe, and the number of slurry distribution pipes matches the number of the inlet pipelines. After the slurry enters the slurry distribution trough, it flows to the inlet pipeline through the slurry distribution pipe to enhance the collision.

[0010] Preferably, a small-diameter liner jet pipe is provided at the connection between the inlet pipeline and the mineralized cylinder, and the liner jet pipe passes through the side wall of the mineralized cylinder and extends a set distance into the mineralized cylinder to enhance the collision.

[0011] Preferably, the small-diameter inner-lined jet pipe is specifically: the diameter of the inner-lined jet pipe is 1 / 4 to 3 / 4 of the diameter of the inlet pipeline.

[0012] Preferably, a lined jet pipe is provided at the connection end between the slurry distribution pipe and the slurry distribution trough, and the slurry distribution trough feeds the slurry into the slurry distribution pipe through the lined jet pipe.

[0013] Preferably, the air pipeline is arranged on a side of the slurry distribution pipe close to the lining jet pipe, and the lining jet pipe is used to disperse the air from the air pipeline into tiny bubbles and mix them with the slurry.

[0014] Preferably, the mineralization cylinder has a horizontally arranged annular plate inside, the edge of the annular plate is tightly connected to the inner wall of the mineralization cylinder, and the central hole of the annular plate is used for slurry flow; a plurality of annular plates divide the mineralization cylinder into interconnected chambers to strengthen different stages of the mineralization process inside the mineralization cylinder.

[0015] Preferably, the first annular plate is arranged between the ore inlet and the mineralization impeller, and the first annular plate and the bottom of the mineralization cylinder form a counter-flow mineralization chamber; the second annular plate is arranged below the ore outlet near the ore outlet, and the second annular plate and the top of the mineralization cylinder form a slurry discharge chamber.

[0016] Preferably, the air pipeline further comprises an air distribution pipe, which is connected to an external air pump to obtain air and evenly distribute the air to each air pipeline connected to the slurry distribution pipe.

[0017] Preferably, a one-way valve is installed on the air pipeline along the direction of air movement to prevent the slurry from entering the air pipeline and the air distribution pipe.

[0018] Preferably, a central annular plate is provided between the second annular plate and the first annular plate, and a dispersed circulation mineralization chamber is formed between the central annular plate and the second annular plate, and a vortex forced mineralization chamber is formed between the central annular plate and the first annular plate.

[0019] Preferably, the mineralizing impeller is a semi-open radial impeller, the blades of which are arranged vertically so that the fluid moves in a horizontal plane after being stirred.

[0020] Preferably, the stirring device further comprises a dispersion circulation impeller, and the dispersion circulation impeller is arranged in the dispersion circulation mineralization chamber.

[0021] Preferably, the dispersion circulation impeller is an open axial downward pressure flow impeller, that is, the blades are arranged obliquely, and stirring provides axial kinetic energy for the fluid.

[0022] Preferably, the center hole diameter of the first annular plate is smaller than or equal to the inlet diameter of the mineralizing impeller, and the center hole diameters of the central annular plate and the second annular plate are larger than the blade diameters of the mineralizing impeller and the dispersion circulation impeller.

[0023] Preferably, baffles are provided on the upper surface of the first circular plate and the lower surface of the second circular plate, and several of the baffles are radially arranged around the central hole of the circular plate, with one long side of the baffle fitting against the inner wall of the mineralization cylinder, and the width of the baffle is shorter than the ring width of the circular plate.

[0024] Preferably, the baffle provided on the upper surface of the first annular plate extends upward to exceed the top surface of the mineralization impeller, and the baffle provided on the lower surface of the second annular plate extends downward to exceed the bottom surface of the dispersion circulation impeller.

[0025] Preferably, lining plates are provided on both the upper and lower surfaces of the central annular plate, and the lining plates are radially arranged around the central hole of the central annular plate, with one long side of the lining plate fitting against the inner wall of the mineralization cylinder, and the width of the lining plate is shorter than the ring width of the central annular plate.

[0026] Preferably, 4 to 8 baffles are evenly arranged around the center hole of the annular plate.

[0027] Preferably, 4 to 8 lining plates are evenly arranged around the center hole of the annular plate.

[0028] Preferably, the top of the mineralization cylinder is sealed by a sealing cover plate, and a ore drawing pipe is provided at the bottom of the mineralization cylinder for discharging residual ore pulp.

[0029] Preferably, the vortex mineralizer is further connected to a power device, and the power device is electrically connected to a stirring device in the vortex mineralizer.

[0030] Preferably, the power device is a drive motor, and the drive motor is arranged on the sealing cover plate at the top of the mineralization cylinder.

[0031] A second object of the present invention is to provide a mineralization method based on a confined space eddy current flotation mineralization device, comprising the following steps:

[0032] S1. When starting work, close the ore pipe, start feeding the ore, open the air pipeline to supply air to the slurry distribution pipe, and the slurry and air are mixed and mineralized in the slurry distribution pipe. The mineralized slurry passes through the ore inlet and enters the mineralization cylinder in the form of a collision flow through the inlet pipe. After the slurry in the mineralization cylinder reaches the set liquid level, turn on the stirring device to further disperse the air in the slurry to form tiny bubbles, and further strengthen the mineralization process between the air and the mineral particles;

[0033] S2. Mineral particles collide with bubbles within the mineralization cylinder and are mineralized. The gas-laden slurry is discharged from the outlet, collected, and subsequently processed.

[0034] S3. After mineralization is completed, the air pipeline and the stirring device are closed in sequence, the feeding of ore is stopped, and then the ore discharge pipe is opened to empty the residual slurry in the mineralization cylinder.

[0035] The beneficial effects of the present invention are:

[0036] 1) The vortex mineralizer of the present invention forms strong turbulence through the colliding flow of the slurry and the high-speed stirring flow induced by the impeller, inducing the generation of small-scale turbulent micro-vortices, strengthening the fine particles to break through the fluid streamline restrictions, collide and adhere with the bubbles, and achieve efficient mineralization of fine particles and bubbles.

[0037] 2) The inlet pipeline is connected to the liner jet tube. The liner jet tube extends into the mineralization cylinder and reduces its diameter to increase the intensity of the impinging flow, thereby inducing the generation of small-scale turbulent micro-vortices. The impinging flow can be strengthened by replacing the liner jet tubes with different diameters and lengths, thereby inducing turbulent micro-vortices of different scales to enhance the mineralization process of minerals with different physical properties.

[0038] 3) The ore inlet end of the ore inlet is arranged on the slurry distribution trough, and the slurry distribution trough is connected to the slurry distribution pipe. By arranging an inner lining jet pipe at the connection between the slurry distribution pipe and the slurry distribution trough, a strong shear slurry jet is formed in the slurry distribution pipe, which can promote the air supplied from the air pipeline on the outer side wall above the slurry distribution pipe to disperse and rupture under the strong shear action to form tiny bubbles, thereby enhancing air dispersion.

[0039] 4) The mineralization cylinder is equipped with three layers of annular plates, divided into four chambers: from low to high, the impinging flow mineralization chamber, the vortex forced mineralization chamber, the dispersed circulation mineralization chamber, and the discharge chamber. The vortex forced mineralization chamber generates strong turbulence through the high-speed rotation of the mineralizing impeller, inducing small-scale turbulent micro-vortices. This not only enhances bubble dispersion and microbubble generation, but also helps force fine mineral particles to break through the fluid streamlines and enhance their mineralization with the bubbles. The dispersed circulation mineralization chamber, on the other hand, generates axial downward pressure through the dispersed circulation impeller installed in this chamber. This promotes the downward circulation of the slurry, increases the residence time of mineral particles in the cylinder, and increases the frequency of collisions between mineral particles and bubbles.

[0040] 5) In the vortex forced mineralization chamber, the inlet pipeline generates a collision flow at the bottom of the vortex mineralizer. On the one hand, it enhances turbulent dissipation, induces small-scale vortices, and strengthens the collision and adhesion of fine-grained minerals and bubbles; on the other hand, it prevents the slurry from accumulating at the bottom of the vortex mineralizer, which affects the working effect.

[0041] 6) The mineralization device is a confined space with a closed top. During operation, a high-pressure solution environment is formed inside the mineralization cylinder, further strengthening energy concentration and enhancing turbulent motion. In addition, the high-pressure solution environment enhances the solubility of air, which is conducive to the generation of microbubbles and nanobubbles, strengthening air dispersion and interfacial nanobubble bridging, and providing suitable bubble carriers and interfacial mineralization conditions for the flotation of fine minerals. BRIEF DESCRIPTION OF THE DRAWINGS

[0042] FIG1 is a schematic structural diagram of a mineralization device according to the present invention;

[0043] Figure 2 is a schematic structural diagram of a mineralized impeller;

[0044] Figure 3 is a schematic structural diagram of the dispersion circulation impeller.

[0045] The meanings of the symbols in the figure are as follows:

[0046] 10-mineralization cylinder 11-ore inlet 111-lined jet pipe 12-ore outlet 13-ore drawing pipe 14-sealing cover

[0047] 20-Air pipeline 21-Air distribution pipe

[0048] 30-Stirring device 31-Mineralization impeller 32-Dispersion circulation impeller

[0049] 40- slurry distribution trough 41- slurry distribution pipe

[0050] 50- annular plate 51- center hole

[0051] 50a-first annular plate 50b-second annular plate 50c-center annular plate

[0052] 52- baffle 53- lining

[0053] 60-Drive motor DETAILED DESCRIPTION

[0054] The technical solution of the present invention is described in more detail below with reference to the embodiments and drawings:

[0055] As shown in Figures 1-3, a confined space eddy current flotation mineralization device includes a mineralizer body, within which is a mineralization cylinder 10 for mineralization. The cylinder 10 is sealed at both ends, with an inlet 11 on the bottom sidewall and an outlet 12 on the top sidewall, forming a mineralization pipeline from bottom to top within the cylinder 10. A draw pipe 13 is also provided at the bottom of the cylinder 10 to discharge any residual slurry after completion.

[0056] The ore inlet 11 includes at least two oppositely arranged inlet pipes, so that the mineral slurry enters the mineralization cylinder 10 in the form of impinging flow. On the one hand, the impinging flow can enhance turbulent dissipation, induce small-scale vortices, and strengthen the collision and adhesion of fine-grained minerals and bubbles. On the other hand, it can prevent the slurry from accumulating at the bottom of the vortex mineralizer and affecting the working effect.

[0057] In order to strengthen the impinging flow, an inner lining jet tube 111 is further provided at the connection between the inlet pipeline and the mineralization cylinder 10. The inner lining jet tube 111 passes through the side wall of the mineralization cylinder 10 and extends a set distance into the mineralization cylinder 10. The diameter of the inner lining jet tube 111 is 1 / 4 to 3 / 4 of the diameter of the inlet pipeline.

[0058] The device also includes an air line 20 and a stirring device 30. The air line 20 is connected to the ore inlet 11 and is used to supply air to the slurry. The stirring device 30 is disposed within the mineralization cylinder 10 and includes a semi-open impeller 31 for stirring. The impeller 31 is located above the impinging flow path between the inlet pipes. The impeller 31 stirs the air entering the slurry, further dispersing it and forming tiny bubbles to enhance mineralization.

[0059] The top of the mineralization cylinder 10 is sealed by a sealing cover plate 14. The vortex mineralizer is also connected to a power device, which is electrically connected to the stirring device 30 in the vortex mineralizer. The power device is a drive motor 60, which is installed on the sealing cover plate 14 at the top of the mineralization cylinder 10.

[0060] In this embodiment, the stirring device 30 is a rod having a stirring shaft disposed along the axis of the mineralization cylinder 10. A mineralizing impeller 31 is disposed at one end of the stirring shaft. The other end of the stirring shaft is connected to a drive motor 60, which rotates to drive the mineralizing impeller 31. Below the ore outlet 12, a dispersion circulation impeller 32 is also disposed on the stirring shaft of the stirring device 30. This dispersion circulation impeller 32 is an open axial downward pressure impeller.

[0061] On the basis of Example 1, the ore inlet 11 of the eddy current flotation mineralization device is further provided with a pressurization device to increase the intensity of the impinging flow.

[0062] As shown in Figure 1, the eddy current flotation mineralization device is also provided with a slurry distribution trough 40. The slurry distribution trough 40 is a closed pipe arranged around the outer wall of the mineralization cylinder 10. The inlet end of the ore inlet 11 is arranged on the slurry distribution trough 40. The slurry distribution trough 40 is arranged at a height close to the ore outlet 12. The slurry distribution trough 40 is connected to the vertically arranged slurry distribution pipe 41. The number of slurry distribution pipes 41 matches the number of the inlet pipelines. After the slurry enters the slurry distribution trough 40, it flows to the inlet pipeline through the slurry distribution pipe 41, combined with the setting of the lining jet pipe 111 to enhance the collision.

[0063] The air pipeline 20 is arranged on the slurry distribution pipe 41. The connecting end of the slurry distribution pipe 41 and the slurry distribution tank 40 is provided with a lined jet pipe 111. The air pipeline 20 is used to inject air into the slurry in the slurry distribution pipe 41. The slurry distribution tank 40 feeds the slurry into the slurry distribution pipe 41 through the lined jet pipe 111. The jet of the lined jet pipe 111 can shear and disperse the air to form small bubbles, so that the bubbles and minerals are mineralized in the slurry distribution pipe 41.

[0064] The air pipeline 20 further includes an air distribution pipe 21 , which is connected to an external air pump to obtain air and evenly distribute the air to each air pipeline 20 connected to the slurry distribution pipe 41 .

[0065] In addition, a one-way valve is installed on the air pipeline 20 along the direction of air movement to prevent slurry from entering the air pipeline 20 and the air distribution pipe 21.

[0066] On the basis of Example 1 or Example 2, the mineralization cylinder 10 further has a horizontally arranged annular plate 50, the edge of which is tightly connected to the inner wall of the mineralization cylinder 10, and the central hole 51 of the annular plate 50 is used for slurry flow; a total of three annular plates 50 divide the mineralization cylinder 10 into interconnected chambers to adjust the mineralization intensity of different mineral particles inside the mineralization cylinder 10.

[0067] Specifically, a first annular plate 50a is disposed between the ore inlet 11 and the mineralizing impeller 31. The first annular plate 50a forms an impinging flow mineralization chamber with the bottom of the mineralizing cylinder 10. A second annular plate 50b is disposed below the ore outlet 12 near the ore outlet 12. The second annular plate 50b forms a slurry discharge chamber with the top of the mineralizing cylinder 10. A central annular plate 50c is further disposed between the first and second annular plates 50a, 50b. The central annular plate 50c forms a dispersed circulation mineralization chamber with the second annular plate 50b and a vortex forced mineralization chamber with the first annular plate 50a.

[0068] By partitioning the device with the annular plate 50, the mineralization sequentially undergoes collision flow mineralization and eddy flow mineralization along the direction of the mineralization pipeline in the entire device. The corresponding turbulence dissipation step is enhanced and the turbulence eddy scale step is reduced, thereby adapting to the different stages of the flotation mineralization process. The efficient flotation recovery of mineral particles is achieved through the step-by-step adaptation of turbulence energy.

[0069] Specifically, in the impinging flow mineralization chamber, an inlet pipe is provided at the ore inlet 11 so that the slurry enters the mineralization cylinder 10 in the form of impinging flow. On the one hand, the impinging flow enhances turbulent dissipation, induces small-scale vortices, and strengthens the collision and adhesion of fine-grained minerals and bubbles; on the other hand, it prevents the slurry from accumulating at the bottom of the mineralization cylinder 10, which affects the working effect.

[0070] Because the top of the mineralization cylinder 10 is a closed, confined space, a high-pressure solution environment is easily formed within the eddy current mineralizer during operation, enhancing energy concentration and turbulent motion. Simultaneously, the solubility of air in the high-pressure solution environment is enhanced, which facilitates the generation of micro-nano bubbles, strengthens air dispersion and interfacial nanobubble bridging, and provides suitable bubble carriers and interfacial mineralization conditions for the flotation of fine minerals.

[0071] The mineralization impeller 31 is located in the vortex forced mineralization chamber. The mineralization impeller 31 is a semi-open radial impeller. Its high-speed rotation can generate strong turbulence, inducing small-scale turbulent micro-vortices, which can enhance bubble dispersion and generate microbubbles. It is also beneficial to further force fine mineral particles to break through the fluid streamline restrictions and strengthen their mineralization with bubbles. The dispersion circulation impeller 32 is located in the dispersion circulation mineralization chamber. The dispersion circulation impeller 32 is an open axial downward pressure flow impeller. Its high-speed rotation generates axial downward pressure flow, which can promote the downward circulation of the slurry, increase the residence time of mineral particles in the cylinder, and increase the frequency of collision between them and bubbles.

[0072] In this embodiment, further, the diameter of the center hole 51 of the first annular plate 50a is less than or equal to the inlet diameter of the mineralization impeller 31, and the diameters of the center holes 51 of the central annular plate 50c and the second annular plate 50b are both larger than the inlet diameter of the mineralization impeller 31 and the blade diameter of the dispersion circulation impeller 32.

[0073] Baffles 52 are provided on the upper surface of the first annular plate 50a and the lower surface of the second annular plate 50b. Several of the baffles 52 are radially arranged around the central hole 51 of the annular plate 50. One long side of the baffle 52 abuts the inner wall of the mineralization cylinder 10, and the width of the baffle 52 is shorter than the ring width of the annular plate 50. Lining plates 53 are provided on the upper and lower surfaces of the central annular plate 50c. The lining plates 53 are radially arranged around the central hole 51 of the central annular plate 50c. One long side of the lining plates 53 abuts the inner wall of the mineralization cylinder 10, and the width of the lining plates 53 is shorter than the ring width of the central annular plate 50c.

[0074] On the one hand, the baffle 52 and the liner 53 can support the annular plate 50, and can also prevent the slurry from forming an inertial vortex that adheres to the inner wall of the mineralization cylinder 10, thereby improving the mineralization effect; in order to further avoid the formation of inertial vortex, the baffle 52 set on the upper surface of the first annular plate 50a extends upward to a position beyond the top surface of the mineralization impeller 31, and the liner 53 set on the lower surface of the second annular plate 50b extends downward to a position beyond the bottom surface of the dispersion circulation impeller 32.

[0075] In the present invention, for example, 4 to 8 baffles 52 and liner plates 53 are evenly arranged around the center hole 51 of the annular plate 50, and the number of baffles 52 and liner plates 53 remains the same. However, in actual applications, there are no specific requirements for the number and shape of baffles 52 and liner plates 53, and they can be adjusted according to mineralization requirements.

[0076] The present invention provides a mineralization method based on the above-mentioned confined space eddy current flotation mineralization device, comprising the following steps:

[0077] S1. At the start of operation, the ore pipe 13 is closed, ore is fed, and the air pipe 20 is opened to introduce air into the slurry. The slurry and air mix and mineralize. The mineralized slurry passes through the ore inlet 11 and enters the mineralization cylinder 10 in the form of a collision flow through the inlet pipe. After the slurry in the mineralization cylinder 10 reaches the set liquid level, the stirring device 30 is turned on to further disperse the air in the slurry to form tiny bubbles, further strengthening the mineralization process between the air and the mineral particles.

[0078] S2 mineral particles in the mineralization cylinder 10 and the bubble collision mineralization, gas slurry is discharged from the outlet 12, collected and subsequently processed;

[0079] S3. After the mineralization is completed, the air pipeline 20 and the stirring device 30 are closed, the feeding of the ore is stopped, and then the ore discharge pipe is opened to empty the residual slurry in the mineralization cylinder 10.

[0080] When a slurry distribution tank 40 is provided at the inlet of the mineralization pipeline, the operation process remains unchanged. Only the slurry flow process is increased by the distribution in the slurry distribution tank 40 and the aeration and mineralization process of the air pipeline 20 to the slurry distribution pipe 41, which will not be repeated here.

[0081] The above embodiments are only used to illustrate the technical solutions of the present invention, and are not intended to limit the present invention. Although the present invention has been described in detail with reference to the above embodiments, those skilled in the art should understand that any modifications, equivalent substitutions, and improvements made within the spirit and principles of the present invention should be included in the scope of protection of the present invention.

Claims

1. A confined space eddy current flotation mineralization device, comprising a mineralizer body, wherein the interior of the mineralizer body is a mineralization cylinder (10) for mineralization, characterized in that: The bottom side wall of the mineralization cylinder (10) is provided with an inlet (11), and the top side wall is provided with an outlet (12), so as to form a mineralization pipeline from bottom to top in the mineralization cylinder (10); the inlet (11) comprises at least two inlet pipelines arranged opposite to each other, so that gas-containing mineral slurry enters the mineralization cylinder (10) in the form of a collision flow; the device further comprises an air pipeline (20) and a stirring device (30), wherein the air pipeline (20) is connected to the inlet (11) and is used to supply air to the slurry, and the stirring device (30) is arranged inside the mineralization cylinder (10), and the stirring device (30) has a mineralization impeller (31) for stirring, and the mineralization impeller (31) is arranged above the collision flow path between the inlet pipelines.

2. The eddy current flotation mineralization device based on confined space according to claim 1, characterized in that: The ore inlet end of the ore inlet (11) is arranged on a slurry distribution trough (40), and the slurry distribution trough (40) is a closed pipe arranged around the outer side wall of the top of the mineralization cylinder (10). The slurry distribution trough (40) is connected to a vertically arranged slurry distribution pipe (41), and the number of the slurry distribution pipes (41) matches the number of the inlet pipelines. After the slurry enters the slurry distribution trough (40), it flows to the inlet pipeline through the slurry distribution pipe (41) to strengthen the collision.

3. The eddy current flotation mineralization device based on confined space as claimed in claim 1, characterized in that: A small-diameter liner jet pipe (111) is provided at the connection between the inlet pipeline and the mineralization cylinder (10); the liner jet pipe (111) passes through the side wall of the mineralization cylinder (10) and extends a set distance into the interior of the mineralization cylinder (10) to strengthen the collision.

4. The eddy current flotation mineralization device based on confined space as claimed in claim 3, characterized in that: The small-diameter inner-lined jet pipe (111) is specifically: the pipe diameter of the inner-lined jet pipe (111) is 1 / 4 to 3 / 4 of the pipe diameter of the inlet pipeline.

5. The eddy current flotation mineralization device based on confined space as claimed in claim 2, characterized in that: An inner lining jet pipe (111) is provided at the connection end between the slurry distribution pipe (41) and the slurry distribution tank (40), and the slurry distribution tank (40) feeds the slurry into the slurry distribution pipe (41) through the inner lining jet pipe (111).

6. The eddy current flotation mineralization device based on confined space as claimed in claim 5, characterized in that: The air pipeline (20) is arranged on a side of the slurry distribution pipe (41) close to the lining jet pipe (111), and the lining jet pipe (111) is used to disperse air from the air pipeline (20) into tiny bubbles and mix them with the slurry.

7. The eddy current flotation mineralization device based on confined space as claimed in claim 1, characterized in that: The mineralization cylinder (10) has a horizontally arranged annular plate (50) inside, the edge of the annular plate (50) is tightly connected to the inner wall of the mineralization cylinder (10), and the central hole (51) of the annular plate (50) is used for the flow of slurry; a plurality of annular plates (50) divide the mineralization cylinder (10) into interconnected chambers to strengthen different stages of the mineralization process inside the mineralization cylinder (10).

8. The eddy current flotation mineralization device based on confined space as claimed in claim 7, characterized in that: The first annular plate (50a) is arranged between the ore inlet (11) and the mineralization impeller (31), and the first annular plate (50a) and the bottom of the mineralization cylinder (10) form a collision flow mineralization chamber; the second annular plate (50b) is arranged below the ore outlet (12) near the ore outlet (12), and the second annular plate (50b) and the top of the mineralization cylinder (10) form a slurry discharge chamber.

9. The eddy current flotation mineralization device based on confined space as claimed in claim 8, characterized in that: The air pipeline (20) further comprises an air distribution pipe (21), wherein the air distribution pipe (21) is connected to an external air pump to obtain air and evenly distributes the air to each air pipeline (20) connected to the slurry distribution pipe (41).

10. The eddy current flotation mineralization device based on confined space as claimed in claim 9, characterized in that: A one-way valve is installed on the air pipeline (20) along the direction of air movement to prevent slurry from entering the air pipeline (20) and the air distribution pipe (21).

11. The eddy current flotation mineralization device based on confined space according to claim 8, characterized in that: A central annular plate (50c) is further provided between the second annular plate (50b) and the first annular plate (50a); a dispersed circulation mineralization chamber is formed between the central annular plate (50c) and the second annular plate (50b), and a vortex forced mineralization chamber is formed between the central annular plate (50c) and the first annular plate (50a).

12. The eddy current flotation mineralization device based on confined space according to claim 1, characterized in that: The mineralization impeller (31) is a semi-open radial impeller.

13. The eddy current flotation mineralization device based on confined space according to claim 11, characterized in that: The stirring device (30) further comprises a dispersion circulation impeller (32), and the dispersion circulation impeller (32) is arranged in the dispersion circulation mineralization chamber.

14. The eddy current flotation mineralization device based on confined space as claimed in claim 13, characterized in that: The dispersion circulation impeller (32) is an open axial downward pressure flow impeller.

15. The eddy current flotation mineralization device based on confined space as claimed in claim 13, characterized in that: The diameter of the central hole (51) of the first annular plate (50a) is less than or equal to the inlet diameter of the mineralizing impeller (31), and the diameters of the central holes (51) of the central annular plate (50c) and the second annular plate (50b) are both greater than the blade diameters of the mineralizing impeller (31) and the dispersion circulation impeller (32).

16. The eddy current flotation mineralization device based on confined space according to claim 13, characterized in that: Baffles (52) are provided on the upper surface of the first annular plate (50a) and the lower surface of the second annular plate (50b), and a plurality of baffles (52) are radially arranged around the central hole (51) of the annular plate (50), with one long side of the baffle (52) being in contact with the inner wall of the mineralization cylinder (10), and the width of the baffle (52) being shorter than the ring width of the annular plate (50).

17. The eddy current flotation mineralization device based on confined space according to claim 16, characterized in that: The baffle plate (52) provided on the upper surface of the first annular plate (50a) extends upward to a position beyond the top surface of the mineralizing impeller (31), and the baffle plate (52) provided on the lower surface of the second annular plate (33b) extends downward to a position beyond the bottom surface of the dispersion circulation impeller (32).

18. The eddy current flotation mineralization device based on confined space according to claim 11, characterized in that: Lining plates (53) are provided on the upper and lower surfaces of the central annular plate (50c). The lining plates (53) are radially arranged around the central hole (51) of the central annular plate (50c). One long side of the lining plate (53) fits the inner wall of the mineralized cylinder (10). The width of the lining plate (53) is shorter than the ring width of the central annular plate (50c).

19. The eddy current flotation mineralization device based on confined space as claimed in claim 18, characterized in that: Four to eight baffles (52) are evenly arranged around the central hole (51) of the annular plate (50).

20. The eddy current flotation mineralization device based on confined space as claimed in claim 18, characterized in that: Four to eight lining plates (53) are evenly arranged around the central hole (51) of the annular plate (50).

21. The eddy current flotation mineralization device based on confined space according to claim 1, characterized in that: The top of the mineralization cylinder (10) is sealed by a sealing cover plate (14), and a ore discharge pipe (13) is also provided at the bottom of the mineralization cylinder (10) for discharging residual ore slurry.

22. The eddy current flotation mineralization device based on confined space according to claim 21, characterized in that: The vortex mineralizer is also connected to a power device, and the power device is electrically connected to a stirring device (30) in the vortex mineralizer.

23. The eddy current flotation mineralization device based on confined space as claimed in claim 22, characterized in that: The power device is a drive motor (60), and the drive motor (60) is arranged on a sealing cover plate (14) at the top end of the mineralization cylinder (10).

24. A mineralization method based on a confined space eddy current flotation mineralization device as claimed in any one of claims 1 to 23, characterized in that: The following steps are involved: S1. When starting work, the ore discharge pipe (13) is closed, the ore feeding starts, and the air pipeline is opened to feed air into the slurry distribution pipe (41). The slurry and the air are mixed and mineralized in the slurry distribution pipe (41). The mineralized slurry passes through the ore inlet (11) and enters the interior of the mineralization cylinder (10) in the form of a collision flow through the inlet pipeline. After the slurry in the mineralization cylinder (10) reaches a set liquid level, the stirring device (30) is turned on to further disperse the air in the slurry to form tiny bubbles, and further strengthen the mineralization process between the air and the mineral particles; S2. The mineral particles collide with the bubbles in the mineralization cylinder (10) to be mineralized, and the gas-containing slurry is discharged from the outlet (12), collected and subsequently processed; S3. After the mineralization is completed, the air pipeline (20) and the stirring device (30) are closed in sequence, the feeding of ore is stopped, and then the ore discharge pipe is opened to drain the residual ore slurry in the mineralization cylinder (10).

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