Flotation column

Abstract

The utility model belongs to the technical field of mineral flotation equipment, and particularly relates to a flotation column which comprises a flotation column body. The bubble distribution plate is arranged at the bottom of the flotation column body, the air inlet end of the bubble distribution plate communicates with the air inlet part, and the air outlet end of the bubble distribution plate communicates with the interior of the flotation column body; the spiral rising water flow pipeline is arranged in the middle of the flotation column body, the water inlet end and the water outlet end of the spiral rising water flow pipeline both penetrate through the side wall of the flotation column body, and a plurality of water flow holes are formed in the spiral rising water flow pipeline and located in the flotation column body; the feeding pipeline is arranged in the middle of the flotation column body in a communicating mode, the discharging end of the feeding pipeline is located above the spiral rising water flow pipeline, the discharging direction of the feeding pipeline is parallel to the tangential direction of the flotation column body, and the feeding pipeline is provided with a Venturi tube structure; the clean coal discharging part is arranged on one side of the top of the flotation column body in a communicating manner; and the tailing discharging part is arranged on one side of the bottom of the flotation column body in a communicating manner.

Description

Technical Field

[0001] The utility model belongs to the technical field of mineral flotation equipment, and particularly relates to a flotation column. Background Art

[0002] In the field of mineral processing, due to the absence of a mechanical stirring mechanism, the flotation column has the characteristics of low energy consumption, simple maintenance and operation, and low maintenance cost, and is favored by many ore dressing enterprises. The existing flotation columns mainly include two categories: countercurrent contact aeration flotation columns and circulating jet suction flotation columns.

[0003] Due to the long static separation time of particle-bubble aggregates and gangue particles, the flotation rate of the existing flotation columns is low, and coarse particles are easy to desorb from bubbles, making it difficult to be applicable to wide particle size materials. Therefore, there is an urgent need for a flotation column to solve this problem. Summary of the Utility Model

[0004] The purpose of the utility model is to provide a flotation column to solve the above problems.

[0005] To achieve the above purpose, the utility model provides the following solution:

[0006] A flotation column, comprising:

[0007] A flotation column body;

[0008] A bubble distribution plate, arranged at the bottom of the flotation column body, the air inlet end of the bubble distribution plate is communicated with an air inlet part, and the air outlet end of the bubble distribution plate is communicated with the inside of the flotation column body;

[0009] A spiral upward water flow pipeline, arranged in the middle of the flotation column body, the water inlet end and the water outlet end of the spiral upward water flow pipeline both penetrate through the side wall of the flotation column body, and a plurality of water flow holes are arranged on the spiral upward water flow pipeline, and a plurality of the water flow holes are located inside the flotation column body;

[0010] A feeding pipeline, communicatively arranged in the middle of the flotation column body, the discharging end of the feeding pipeline is located above the spiral upward water flow pipeline, the discharging direction of the feeding pipeline is parallel to the tangential direction of the flotation column body, and a Venturi tube structure is arranged in the middle of the feeding pipeline;

[0011] A clean coal discharging part, communicatively arranged on one side of the top of the flotation column body;

[0012] A tailings discharging part, communicatively arranged on one side of the bottom of the flotation column body.

[0013] Preferably, the bubble distribution plate comprises a base, and a conical cap is coaxially and fixedly connected to the top of the base, and the conical cap and the base are integrally formed;

[0014] The conical cap is provided with a plurality of air bubble holes, and the plurality of air bubble holes are evenly distributed from the center of the conical cap to the edge. The diameters of the plurality of air bubble holes gradually increase from the center of the conical cap to the edge, and the diameter of the air bubble holes is 0.1 mm to 5 mm.

[0015] Preferably, the middle part of the spiral rising water flow pipe is of a spiral pipe structure, and the pitch of the spiral pipe structure gradually increases from the center to the edge;

[0016] A plurality of the water flow holes are arranged on the spiral pipe structure;

[0017] The distance between two adjacent water flow holes gradually increases from the center of the spiral pipe structure to the edge direction of the spiral pipe structure.

[0018] Preferably, the air inlet part includes an air inflation pump, and the air outlet end of the air inflation pump is communicated with the air inlet end of the air bubble distribution plate.

[0019] Preferably, the clean coal discharge part includes a clean coal air bubble combination body outlet, and the clean coal air bubble combination body outlet is communicated and arranged on one side of the top of the flotation column body.

[0020] Preferably, the tailings discharge part includes a tailings discharge pipe, the tailings discharge pipe is communicated and arranged on one side of the bottom of the flotation column body, and the discharge end of the tailings discharge pipe is communicated with a tailings pump for pumping out the tailings.

[0021] Compared with the prior art, the utility model has the following advantages and technical effects:

[0022] During use, the pulp enters the flotation column body through the feed pipe, drops downward from the middle of the flotation column body, water is introduced into the spiral rising water flow pipe, and under the action of a plurality of water flow holes, an upward water flow is formed in the flotation column body by the spiral rising water flow pipe. At the same time, air is introduced into the air bubble distribution plate through the air inlet part, and upward air bubbles are formed in the flotation column body through the air bubble distribution plate. The feed pipe is of a Venturi tube structure, and when the pulp passes through the Venturi tube, air flocs are formed through negative pressure suction. After entering the flotation column body tangentially, a centrifugal motion is formed, and under the combined action of the upward water flow and air bubbles generated by the spiral rising water flow pipe and the air bubble distribution plate, the concentrate will move upward to form a concentrate layer, and is collected through the foam overflow tank and the clean coal discharge part arranged at the top of the flotation column body, while the tailings drop downward and are collected through the tailings discharge part, realizing the separation of the pulp.

[0023] In the Venturi tube, micro-nano bubbles are formed, and the bubbles generated by the gas distributor come into contact with the pulp phase to achieve separation according to the hydrophobicity of the particles. The tangential feeding of the feed pipe causes the material to form a centrifugal motion inside the flotation column body. Particles with different densities have different centrifugal motion radii inside the flotation column body. Particles with a large density (such as tailings) move on the periphery, and particles with a small density (such as coal) move in the center. Therefore, separation according to particle density can be achieved. The upward water flow generated by the spiral upward water flow pipe strengthens the floating of low-density hydrophobic fine particles and low-density hydrophobic coarse particles, improving the flotation rate. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] In order to more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the following will briefly introduce the drawings required for use in the embodiments. Obviously, the drawings in the following description are only some embodiments of the present invention. For those of ordinary skill in the art, without creative efforts, other drawings can be obtained based on these drawings:

[0025] Figure 1 It is a schematic structural diagram of the present invention;

[0026] Figure 2 It is a front view of the bubble distribution plate of the present invention;

[0027] Figure 3 It is a top view of the bubble distribution plate of the present invention;

[0028] Figure 4 It is a top view of the spiral upward water flow pipe of the present invention;

[0029] Among them, 1. Flotation column body; 2. Feed pipe; 3. Spiral upward water flow pipe; 4. Bubble distribution plate; 5. Air pump; 6. Outlet of fine gas-bubble combination; 401. Base; 402. Conical cap; 403. Bubble hole. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0030] The following will clearly and completely describe the technical solutions in the embodiments of the present invention with reference to the drawings in the embodiments of the present invention. Obviously, the described embodiments are only some embodiments of the present invention, rather than all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts belong to the scope of protection of the present invention.

[0031] To make the above objects, features, and advantages of the present invention more obvious and understandable, the present invention will be further described in detail below with reference to the drawings and specific embodiments.

[0032] Refer to Figures 1 to 3, the present utility model discloses a flotation column, comprising:

[0033] The flotation column body 1;

[0034] The bubble distribution plate 4 is arranged at the bottom of the flotation column body 1. The air inlet end of the bubble distribution plate 4 is communicated with the air inlet part, and the air outlet end of the bubble distribution plate 4 is communicated with the inside of the flotation column body 1;

[0035] The spiral upward water flow pipe 3 is arranged in the middle of the flotation column body 1. The water inlet end and the water outlet end of the spiral upward water flow pipe 3 both penetrate through the side wall of the flotation column body 1. A number of water flow holes are provided on the spiral upward water flow pipe 3, and a number of water flow holes are located inside the flotation column body 1;

[0036] The feed pipe 2 is communicatively arranged in the middle of the flotation column body 1. The discharge end of the feed pipe 2 is located above the spiral upward water flow pipe 3. The discharge direction of the feed pipe 2 is parallel to the tangential direction of the flotation column body 1. A Venturi tube structure is arranged in the middle of the feed pipe 2;

[0037] The clean coal discharge part is communicatively arranged on one side of the top of the flotation column body 1;

[0038] The tailings discharge part is communicatively arranged on one side of the bottom of the flotation column body 1.

[0039] During use, the pulp enters the flotation column body 1 through the feed pipe 2, drops downward from the middle of the flotation column body 1, water is introduced into the spiral upward water flow pipe 3. Under the action of a number of water flow holes, the spiral upward water flow pipe 3 forms an upward water flow inside the flotation column body 1. At the same time, air is introduced into the bubble distribution plate 4 through the air inlet part, and upward bubbles are formed inside the flotation column body 1 through the bubble distribution plate 4. The feed pipe 2 is a Venturi tube structure. When the pulp passes through the Venturi tube, it forms a gas floc through negative pressure suction. After entering the flotation column body 1 tangentially, it forms a centrifugal motion. Under the combined action of the upward water flow and bubbles generated by the spiral upward water flow pipe 3 and the bubble distribution plate 4, the concentrate will move upward to form a concentrate layer, and is collected through the foam overflow tank and the clean coal discharge part arranged at the top of the flotation column body 1, while the tailings drop downward and are collected through the tailings discharge part, realizing the separation of the pulp.

[0040] Micro-nano bubbles are formed in the Venturi tube, and the bubbles generated by the bubble distribution plate 4 come into contact with particles of different hydrophobicities in the pulp, and sorting is achieved according to the hydrophobicity of the particles. The tangential feeding of the feed pipe 2 causes the material to form a centrifugal motion inside the flotation column body 1. The centrifugal motion radii of particles of different densities inside the flotation column body 1 are different. Particles with a large density (such as tailings) move on the periphery, and particles with a small density (such as coal) move in the center. Therefore, sorting according to particle density can be achieved. The upward water flow generated by the spiral upward water flow pipe 3 strengthens the upward movement of low-density particles and particle-bubble aggregates, thereby improving the flotation rate.

[0041] The middle part of the feed pipe 2 is a Venturi tube structure, which forms a jet flow and negative pressure by reducing the pipe diameter. Under the action of negative pressure suction, micro-nano bubbles are formed in the feed pulp. The hydrophobic particles in the pulp preferentially contact and collide with the micro-nano bubbles to form gas flocs. This will cause the macroscopic density of the hydrophobic particle aggregates to further decrease, making them tend to move towards the center during the centrifugal movement after entering the flotation column body 1.

[0042] Furthermore, the feed pipe 2 is installed at the position of 2 / 3 - 3 / 4 of the height of the flotation column body 1 and feeds from the tangential direction of the flotation column body 1, promoting the centrifugal movement of the pulp inside the flotation column body 1 to achieve the purpose of separating particles with different densities in the pulp according to density.

[0043] In a further optimized solution, the bubble distribution plate 4 includes a base 401, and a conical cap 402 is coaxially and fixedly connected to the top of the base 401. The conical cap 402 is integrally formed with the base 401;

[0044] The conical cap 402 is provided with a number of bubble holes 403. The number of bubble holes 403 is evenly distributed from the center of the conical cap 402 to the edge. The diameters of the number of bubble holes 403 increase in sequence from the center of the conical cap 402 to the edge, and the diameter of the bubble holes is 0.1 mm to 5 mm.

[0045] The bubble distribution plate 4 as a whole has a slope, and the thickness of the bubble distribution plate 4 gradually decreases from the center to the periphery. The distribution of the bubble holes 403 of the bubble distribution plate 4 is dense inside and sparse outside, small inside and large outside, and the bubble holes 403 in the central part are the densest and smallest. The design that the thickness of the bubble distribution plate 4 gradually decreases from the center to the periphery is conducive to the gradual change distribution of bubbles from the center to the periphery, and will reduce the influence of the generation and rise of peripheral bubbles on the settlement of tailing particles.

[0046] Since the centrifugal movement of the pulp is affected by the density of the object, the distribution of the bubble holes 403 of the bubble distribution plate 4 is dense inside and sparse outside, which can increase the probability of bubbles contacting the concentrate. The conical cap 402 at the top of the bubble distribution plate 4 is conical, which can make the high-density tailings roll towards the periphery when falling on it, which is more conducive to the extraction of the tailing discharge part.

[0047] In a further optimized solution, the middle part of the spiral upward water flow pipe 3 is a spiral pipe structure, and the pitch of the spiral pipe structure increases in sequence from the center to the edge;

[0048] A number of water flow holes are arranged on the spiral pipe structure;

[0049] The distance between adjacent two water flow holes increases in sequence from the center of the spiral pipe structure to the edge direction of the spiral pipe structure.

[0050] Since the centrifugal movement of the pulp is affected by the density of the object, the inner pitch of the spiral upward water flow pipe 3 is small and the outer pitch is large, which is convenient for the fall of the tailings.

[0051] The distribution of the water flow holes is similar to that of the bubble holes 403 of the bubble distribution plate 4, both being dense in the middle and sparse on the periphery. Such a setting can accelerate the floating of the concentrate, and the sparse water flow on the periphery will not block the falling of the tailings.

[0052] The pitch of the spiral ascending water flow pipe 3 gradually increases from the middle to the periphery. The pitch of the spiral pipe in the central part is the smallest, and water flow holes of different sizes are distributed at the upper end of the pipe for generating ascending water flow. The water flow in the ascending water flow pipe is fed into from the center of the spiral structure through an extended pipe and discharged from the end of the pipe after passing through the entire pipe. The purpose of such a design is to make the ascending water flow intensity generated in the central part the highest, which matches the movement of low-density particles in the central part and is most conducive to the rapid floating of the flotation clean coal; as the ascending water flow continuously flows out, the ascending water flow intensity in the surrounding area will gradually decrease, thereby reducing the influence of the ascending water flow on the sinking of some high-density particles. The ascending water flow formed by the spiral ascending water flow pipe 3 has a large density in the central part of the flotation column body 1 and a small density in the surrounding part.

[0053] In a further optimized solution, the air inlet part includes an air inflation pump 5, and the air outlet end of the air inflation pump 5 is communicated with the air inlet end of the bubble distribution plate 4.

[0054] In a further optimized solution, the clean coal discharge part includes a clean coal-bubble combination body outlet 6, and the clean coal-bubble combination body outlet 6 is communicated and arranged on one side of the top of the flotation column body 1.

[0055] In a further optimized solution, the tailings discharge part includes a tailings discharge pipe, the tailings discharge pipe is communicated and arranged on one side of the bottom of the flotation column body 1, and the discharge end of the tailings discharge pipe is communicated with a tailings pump for pumping out the tailings.

[0056] The tailings pump is used to pump out the tailings at the bottom of the flotation column body 1.

[0057] In the description of the present utility model, it should be understood that the orientation or positional relationship indicated by the terms "longitudinal", "transverse", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc. is the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, and is only for the convenience of describing the present utility model, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be construed as a limitation to the present utility model.

[0058] The above-described embodiments are only descriptions of the preferred modes of the present utility model, and do not limit the scope of the present utility model. Without departing from the design spirit of the present utility model, various deformations and improvements made by those of ordinary skill in the art to the technical solutions of the present utility model should all fall within the protection scope determined by the claims of the present utility model.

Claims

1. A flotation column, characterized in that: include: Flotation column body (1); A bubble distribution plate (4) is arranged at the bottom of the flotation column body (1), the air inlet end of the bubble distribution plate (4) is connected to the air inlet part, and the air outlet end of the bubble distribution plate (4) is connected to the inside of the flotation column body (1); A spiral ascending water flow pipeline (3) is arranged in the middle of the flotation column body (1), the water inlet end and the water outlet end of the spiral ascending water flow pipeline (3) are both arranged through the side wall of the flotation column body (1), and the spiral ascending water flow pipeline (3) is provided with a plurality of water flow holes, and the plurality of water flow holes are located in the flotation column body (1); A feed pipe (2) is arranged in communication with the middle part of the flotation column body (1); the discharge end of the feed pipe (2) is located above the spiral rising water flow pipe (3); the discharge direction of the feed pipe (2) is parallel to the tangent direction of the flotation column body (1); and a venturi tube structure is arranged in the middle part of the feed pipe (2); A clean coal discharge portion, which is connected and arranged on one side of the top of the flotation column body (1); The tailings discharge part is connected and arranged on one side of the bottom of the flotation column body (1).

2. A flotation column according to claim 1, characterized in that: The bubble distribution plate (4) comprises a base (401), a conical cap (402) is coaxially fixed to the top of the base (401), and the conical cap (402) and the base (401) are integrally formed; The conical cap (402) is provided with a plurality of bubble holes (403), the plurality of bubble holes (403) are evenly distributed from the center to the edge of the conical cap (402), the diameters of the plurality of bubble holes (403) increase sequentially from the center to the edge of the conical cap (402), and the diameter of the bubble holes is 0.1 mm to 5 mm.

3. A flotation column according to claim 1, characterized in that: The middle part of the spiral ascending water flow pipeline (3) is a spiral tube structure, and the pitch of the spiral tube structure increases from the center to the edge; A plurality of water flow holes are arranged on the spiral tube structure; The distance between two adjacent water flow holes increases sequentially from the center of the spiral tube structure to the edge of the spiral tube structure.

4. A flotation column according to claim 1, characterized in that: The air inlet portion comprises an air pump (5), and the air outlet end of the air pump (5) is connected to the air inlet end of the bubble distribution plate (4).

5. A flotation column according to claim 1, characterized in that: The clean coal discharge portion comprises a clean coal bubble combination body outlet (6), and the clean coal bubble combination body outlet (6) is arranged in communication with one side of the top of the flotation column body (1).

6. A flotation column according to claim 1, characterized in that: The tailings discharge part comprises a tailings discharge pipe, which is arranged on one side of the bottom of the flotation column body (1) and the discharge end of the tailings discharge pipe is connected to a tailings pump for pumping out the tailings.

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