A confined space eddy current flotation mineralization device and mineralization method

Abstract

The present invention belongs to the technical field of mineral flotation, and specifically relates to a vortex flotation mineralization device and a mineralization method based on a confined space. It includes a mineralization cylinder, a mine inlet is arranged on the bottom side wall of the mineralization cylinder, and a mine outlet is arranged on the top side wall. The mine inlet includes at least two relatively arranged inlet pipes, so that the 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 mine inlet, and is used to supply air to the slurry. The stirring device is arranged inside the mineralization cylinder, and the stirring device has a mineralization impeller for stirring, and the mineralization impeller is arranged above the collision flow path between the inlet pipes. This device forms strong turbulence through the high-speed stirring flow induced by the collision flow and the impeller, realizes a high concentration of turbulent energy, induces the generation of small-scale turbulent micro-vortices, strengthens the fine particles to break through the fluid streamline restrictions, collides and adheres with bubbles, and realizes efficient mineralization of fine particles and bubbles.

Description

Technical Field

[0001] The 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

[0002] Flotation is an effective method for sorting fine-grained minerals. It has been widely used in the energy, resources, chemical and other industries. It uses bubbles as carriers and separates useful minerals from gangue minerals in a complex gas-liquid-solid three-phase system based on the difference in hydrophobicity of the particle surface. The mineralization process of particles and bubbles is the core link of the flotation process, which directly determines the efficiency and capacity of the flotation process, including 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 components and fine embedded particle size are common physical properties of low-grade complex ores. Deep crushing and dissociation are required before sorting to separate minerals of different components, which will lead to further refinement of the particle size of the mineral materials processed by the flotation operation, and fine-grained minerals will become the main particle size in the flotation process.

[0003] During the flotation process, fine-grained minerals are easily affected by fluid streamlines near the bubble wall due to their small particle size and low mass, and lack sufficient inertial force. They have strong water-following properties and are difficult to collide with and directly contact bubbles. In addition, after the collision, there is insufficient kinetic energy to strengthen the drainage of the liquid film between particles and bubbles, and the adhesion efficiency is low. A large number of theoretical studies have shown that there is a fluid scale effect in the mineralization process of mineral flotation, that is, the stronger the turbulence, the stronger the turbulent dissipation, and the smaller the turbulent vortex scale, which is conducive to forcing fine particles to break through the fluid streamline restrictions and increase the probability of collision mineralization between fine particles and bubbles.

[0004] However, the strong turbulent flow field is easy to deteriorate 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

[0005] 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.

[0006] The present invention adopts the following technical solutions:

[0007] A vortex flotation mineralization device based on confined space, comprising a mineralizer body, wherein the interior of the mineralizer body is a mineralization cylinder for mineralization, characterized in that an inlet is arranged on the bottom side wall of the mineralization cylinder, and an outlet is arranged on the top side wall, so as to form a mineralization pipeline from bottom to top in the mineralization cylinder; the inlet comprises at least two inlet pipelines arranged oppositely, so that gas-containing mineral slurry enters the mineralization cylinder in the form of a collision flow; the device also comprises an air pipeline and a stirring device, wherein the air pipeline is connected to the inlet and is used to supply air to the slurry, and the stirring device is arranged inside the mineralization cylinder, and the stirring device has a mineralization impeller for stirring, and the mineralization impeller is arranged above the collision flow path between the inlet pipelines.

[0008] 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 the 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.

[0009] Preferably, a small-diameter liner jet pipe is provided at the connection between the inlet pipeline and the mineralization cylinder, and the liner jet pipe passes through the side wall of the mineralization cylinder and extends a set distance into the interior of the mineralization cylinder to strengthen the collision.

[0010] Preferably, the small-diameter liner jet pipe is specifically: the diameter of the liner jet pipe is 1 / 4 to 3 / 4 of the diameter of the inlet pipeline.

[0011] 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.

[0012] Preferably, the air pipeline is arranged on a side of the slurry distribution pipe close to the liner jet pipe, and the liner jet pipe is used to disperse the air from the air pipeline into tiny bubbles and mix them with the slurry.

[0013] 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 the flow of slurry; a plurality of annular plates divide the mineralization cylinder into interconnected chambers to strengthen different stages of the mineralization process inside the mineralization cylinder.

[0014] 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 an impinging 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.

[0015] Preferably, the air pipeline further comprises an air distribution pipe, which is connected to an external air pump to obtain air and evenly distributes the air to each air pipeline connected to the slurry distribution pipe.

[0016] Preferably, a one-way valve is installed on the air pipeline along the air movement direction to prevent the slurry from entering the air pipeline and the air distribution pipe.

[0017] Preferably, a central annular plate is further 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.

[0018] Preferably, the mineralizing impeller is a semi-open radial impeller, and its blades are arranged vertically so that the fluid moves in a horizontal plane after being stirred.

[0019] Preferably, the stirring device also includes a dispersion circulation impeller, and the dispersion circulation impeller is arranged in the dispersion circulation mineralization chamber.

[0020] 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.

[0021] 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 blade diameters of the dispersed circulation impeller.

[0022] Preferably, baffles are provided on the upper surface of the first annular plate and the lower surface of the second annular plate, and a plurality of the baffles are radially arranged around the central hole of the annular plate, with the long side of one 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 annular plate.

[0023] Preferably, the baffle plate provided on the upper surface of the first annular plate extends upward to a position beyond the top surface of the mineralizing impeller, and the baffle plate provided on the lower surface of the second annular plate extends downward to a position beyond the bottom surface of the dispersing circulation impeller.

[0024] Preferably, lining plates are provided on 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 the long side of one 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.

[0025] Preferably, 4 to 8 baffles are evenly arranged around the central hole of the annular plate.

[0026] Preferably, 4 to 8 lining plates are evenly arranged around the central hole of the annular plate.

[0027] Preferably, the top of the mineralization cylinder is sealed by a sealing cover plate, and a ore discharge pipe is provided at the bottom of the mineralization cylinder for discharging residual ore slurry.

[0028] Preferably, the vortex mineralizer is also connected to a power device, and the power device is electrically connected to a stirring device in the vortex mineralizer.

[0029] Preferably, the power device is a drive motor, and the drive motor is arranged on a sealing cover plate at the top of the mineralization cylinder.

[0030] The 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:

[0031] S1. When starting work, close the ore discharge pipe, start feeding ore, open the air pipeline to feed air into the slurry distribution pipe, the slurry and air are mixed and mineralized in the slurry distribution pipe, and the mineralized slurry passes through the ore inlet and enters the mineralization cylinder in the form of a collision flow through the inlet pipeline. 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;

[0032] S2. Mineral particles collide with bubbles in the mineralization cylinder to mineralize, and gas-containing slurry is discharged from the outlet, collected and subsequently processed;

[0033] S3. After mineralization is completed, close the air pipeline and the stirring device in turn, stop feeding the ore, and then open the ore discharge pipe to empty the residual slurry in the mineralization cylinder.

[0034] The beneficial effects of the present invention are:

[0035] 1) The vortex mineralizer of the present invention forms strong turbulence through the slurry collision flow 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 realize the efficient mineralization of the fine particles and bubbles.

[0036] 2) The inlet pipeline is connected to the liner jet tube, which 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 enhanced by replacing liner jet tubes of different diameters and lengths, thereby inducing turbulent micro-vortices of different scales to enhance the mineralization process of minerals with different physical properties.

[0037] 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 liner 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 cause the air supplied from the air pipeline on the upper outer wall of the slurry distribution pipe to disperse and rupture under the strong shearing action to form tiny bubbles, thereby enhancing the air dispersion.

[0038] 4) The mineralization cylinder is equipped with three layers of annular plates and is divided into four chambers, which are, from low to high, the collision 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 and stirring of the mineralization impeller, inducing small-scale turbulent micro-vortices, which on the one hand strengthens the bubble dispersion and generates microbubbles, and on the other hand is conducive to forcing fine mineral particles to break through the fluid streamline restrictions and strengthen their mineralization with bubbles. The dispersed circulation mineralization chamber generates an axial downward pressure flow through the stirring of the dispersed circulation impeller set in the chamber, which promotes the downward circulation movement of the slurry, increases the residence time of the mineral particles in the cylinder, and increases the frequency of collision with bubbles.

[0039] 5) In the vortex forced mineralization chamber, a collision flow is generated at the bottom of the vortex mineralizer through the inlet pipeline. 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, affecting the working effect.

[0040] 6) The mineralization device is a confined space with a closed top. During the working process, a high-pressure solution environment is formed inside the mineralization cylinder, which further strengthens the concentration of energy and enhances turbulent motion. In addition, in the high-pressure solution environment, the solubility of air is enhanced, which is conducive to the generation of microbubbles and nanobubbles, strengthens air dispersion and interface nanobubble bridging, and provides suitable bubble carriers and interface mineralization conditions for the mineralization flotation of fine minerals. BRIEF DESCRIPTION OF THE DRAWINGS

[0041] Figure 1 It is a structural schematic diagram of the mineralization device of the present invention;

[0042] Figure 2 It is a schematic diagram of the structure of the mineralization impeller;

[0043] Figure 3 It is a schematic diagram of the structure of the dispersed circulation impeller.

[0044] The meanings of the symbols in the figure are as follows:

[0045] 10-mineralization cylinder 11-ore inlet 111-lined jet pipe 12-ore outlet 13-ore discharge pipe 14-sealed cover plate

[0046] 20- Air pipeline 21- Air distribution pipe

[0047] 30-Stirring device 31-Mineralizing impeller 32-Dispersing circulation impeller

[0048] 40- slurry distribution trough 41- slurry distribution pipe

[0049] 50- annular plate 51- center hole

[0050] 50a-first annular plate 50b-second annular plate 50c-center annular plate

[0051] 52- baffle 53- lining

[0052] 60-Drive motor DETAILED DESCRIPTION

[0053] The technical solution of the present invention is described in more detail below in conjunction with the embodiments and drawings:

[0054] Example 1

[0055] like Figure 1-Figure 3 As shown, 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 10 for mineralization, wherein both ends of the mineralization cylinder 10 are closed, and a mineral inlet 11 is arranged on the bottom side wall, and a mineral outlet 12 is arranged on the top side wall, forming a mineralization pipeline from bottom to top in the mineralization cylinder 10. A ore discharge pipe 13 is also arranged at the bottom of the mineralization cylinder 10 for discharging the residual ore pulp in the mineralization cylinder 10 after completion.

[0056] The ore inlet 11 includes at least two inlet pipelines arranged opposite to each other, so that the mineral slurry enters the mineralization cylinder 10 in the form of a collision flow. On the one hand, the collision 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 pipe 111 is further provided at the connection between the inlet pipeline and the mineralization cylinder 10. The inner lining jet pipe 111 passes through the side wall of the mineralization cylinder 10 and extends into the mineralization cylinder 10 by a set distance. The diameter of the inner lining jet pipe 111 is 1 / 4 to 3 / 4 of the diameter of the inlet pipeline.

[0058] The device further includes an air pipeline 20 and a stirring device 30. The air pipeline 20 is connected to the ore inlet 11 and is used to supply air to the ore pulp. The stirring device 30 is arranged inside the mineralization cylinder 10. The stirring device 30 has a mineralization impeller 31 for stirring. The mineralization impeller 31 is a semi-open impeller, which is arranged above the collision flow path between the inlet pipelines. The mineralization impeller 31 further disperses the air entering the ore pulp through stirring and forms tiny bubbles to strengthen 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 arranged 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 with a stirring shaft, the stirring shaft is arranged along the axis of the mineralization cylinder 10, the mineralization impeller 31 is arranged at one end of the stirring shaft, and the other end of the stirring shaft is connected to the drive motor 60, and the rotation of the stirring shaft drives the mineralization impeller 31 to work. Below the ore outlet 12, a dispersion circulation impeller 32 is also arranged on the stirring shaft of the stirring device 30, and the dispersion circulation impeller 32 is an open axial downward pressure flow impeller.

[0061] Example 2

[0062] On the basis of Example 1, the ore inlet 11 of the eddy current flotation mineralization device is further provided with a booster to increase the intensity of the impinging flow.

[0063] like Figure 1 As shown, the vortex flotation mineralization device is also provided with a slurry distribution trough 40, which is a closed pipe arranged around the outer wall of the mineralization cylinder 10, and the ore inlet end of the ore inlet 11 is arranged on the slurry distribution trough 40, and 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 pipes 41, and 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 pipes 41, combined with the setting of the lining jet pipe 111, to strengthen the collision.

[0064] 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.

[0065] The air pipeline 20 further includes an air distribution pipe 21 , which 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 .

[0066] In addition, a one-way valve is installed on the air pipeline 20 along the air movement direction to prevent the slurry from entering the air pipeline 20 and the air distribution pipe 21.

[0067] Example 3

[0068] On the basis of Example 1 or Example 2, the mineralization cylinder 10 further has a horizontally arranged annular plate 50, 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 slurry flow; a total of three annular plates 50 divide the mineralization cylinder 10 into connected chambers to adjust the mineralization intensity of different mineral particles inside the mineralization cylinder 10.

[0069] Specifically, the first annular plate 50a is arranged between the ore inlet 11 and the mineralizing impeller 31, and the first annular plate 50a and the bottom of the mineralizing cylinder 10 form a collision flow mineralizing 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 mineralizing cylinder 10 form a slurry discharge chamber. A central annular plate 50c is further arranged between the first annular plate 50a and the second annular plate 50b, and a dispersed circulation mineralizing chamber is formed between the central annular plate 50c and the second annular plate 50b, and a vortex forced mineralizing chamber is formed between the central annular plate 50c and the first annular plate 50a.

[0070] By partitioning with the annular plate 50, the mineralization in the entire device successively undergoes collision flow mineralization and eddy current mineralization along the direction of the mineralization pipeline, the corresponding turbulence dissipation step is enhanced, and the turbulence eddy scale step is reduced, so as to adapt to the different stages of the flotation mineralization process, and realize the efficient flotation recovery of mineral particles through the step adaptation of turbulence energy.

[0071] Specifically, in the impinging flow mineralization chamber, an inlet pipe is arranged 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.

[0072] Since the top of the mineralization cylinder 10 is a closed confined space, a high-pressure solution environment is easily formed inside the vortex mineralizer during operation, which strengthens the concentration of energy and enhances turbulent motion. At the same time, in the high-pressure solution environment, the solubility of air is enhanced, which is conducive to the generation of micro-nano bubbles, strengthens air dispersion and interface nano-bubble bridging, and provides suitable bubble carriers and interface mineralization conditions for the mineralization flotation of fine minerals.

[0073] The mineralization impeller 31 is arranged in the vortex forced mineralization chamber. The mineralization impeller 31 is a semi-open radial impeller. Its high-speed rotation can generate strong turbulence, induce small-scale turbulent micro-vortices, strengthen the bubble dispersion and generate microbubbles, and is also conducive to further forcing fine mineral particles to break through the fluid streamline restrictions and strengthen their mineralization with bubbles. The dispersion circulation impeller 32 is arranged in the dispersion circulation mineralization chamber. The dispersion circulation impeller 32 is an open axial downward pressure flow impeller. Its high-speed rotation generates an axial downward pressure flow, which can promote the downward circulation movement of the slurry, enhance the residence time of the mineral particles in the cylinder, and increase the frequency of collision between the mineral particles and the bubbles.

[0074] 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 mineralizing 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 mineralizing impeller 31 and the blade diameter of the dispersion circulation impeller 32.

[0075] 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 baffles 52 are radially arranged around the central hole 51 of the annular plate 50. One long side of the baffle 52 fits 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 fits 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.

[0076] On the one hand, the baffle 52 and the lining plate 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 arranged 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 lining plate 53 arranged 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.

[0077] In the present invention, for example, 4 to 8 baffles 52 and liner plates 53 are evenly arranged around the central hole 51 of the annular plate 50, and the number of the two is the same. However, in actual applications, there is no specific requirement for the number and shape of the baffles 52 and liner plates 53, which can be adjusted according to the mineralization requirements.

[0078] Example 4

[0079] The present invention provides a mineralization method based on the above-mentioned eddy current flotation mineralization device in a confined space, comprising the following steps:

[0080] S1. When starting work, close the ore discharge pipe 13, start feeding ore, open the air pipeline 20 to feed air into the slurry, and the slurry and air are mixed and mineralized. 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 pipeline. After the slurry in the mineralization cylinder 10 reaches the set liquid level, turn on the stirring device 30 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;

[0081] S2. The mineral particles collide with the bubbles in the mineralization cylinder 10 and are mineralized, and the gas-containing slurry is discharged from the outlet 12, collected and subsequently processed;

[0082] 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 ore slurry in the mineralization cylinder 10.

[0083] When a slurry distribution tank 40 is provided at the inlet of the mineralization pipeline, the operation process remains unchanged, and only the slurry flow process is increased by the distribution in the slurry distribution tank 40 and the process of aerating the slurry distribution pipe 41 through the air pipeline 20 for mineralization, which will not be described in detail here.

[0084] The above implementation modes are only used to illustrate the technical solutions of the present invention, but not to limit the present invention. Although the present invention has been described in detail with reference to the above implementation modes, 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 protection scope 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 6, 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 circular ring plate (50a) and the lower surface of the second circular ring plate (50b), and a plurality of baffles (52) are radially arranged around the central holes (51) of the first circular ring plate (50a) and the second circular ring plate (50b), 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 circular ring 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 (50b) 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 16, 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 holes (51) of the first annular plate (50a) and the second annular plate (50b).

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 central annular plate (50c).

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 flotation mineralization device is also connected to a power device, and the power device is electrically connected to a stirring device (30) in the vortex flotation mineralization device.

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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