High-speed microbubble stirring impeller for mechanical stirring flotation machine

Abstract

The utility model belongs to the technical field of mechanical stirring flotation machines, and discloses a high-speed microbubble stirring impeller for a mechanical stirring flotation machine, which comprises a spindle seat hub. The impeller air pipes extend out of the main shaft seat hub in the circumferential direction; the tail wing is arranged on one side of the impeller air pipe; and the stirring blades are fixedly connected to the tail ends of the top and the bottom of the impeller air pipe, an air inlet is formed in the spindle seat hub, and the air inlet is communicated with the interior of the impeller air pipe. According to the utility model, the miniaturization of the impeller is realized, the mass and the volume of the impeller are reduced, and the energy conservation and consumption reduction of the mechanical stirring flotation machine are realized; the impeller air pipe is arranged on the impeller and rotates at a high speed along with the impeller, micron-sized aeration bubbles can be exploded, and the flotation efficiency and the flotation effect are greatly improved.

Description

Technical Field

[0001] The utility model belongs to the technical field of mechanical agitation flotation machines, and particularly relates to a high-speed microbubble agitation impeller for a mechanical agitation flotation machine. Background Art

[0002] The agitation impeller is a key component in a mechanical agitation flotation machine. Taking the commonly used XJM type flotation machine in China as an example, the impeller draws on the characteristics of a slurry pump impeller. Generally, its shape is an inverted cone or a disc, and several blades are radially extended on the upper and lower surfaces of the disc. There is a hub in the center that can be sleeved on the transmission shaft. The impeller is fastened to the lower end of the main shaft with a nut. Its function is to create a negative pressure area similar to the vacuum chamber of a slurry pump. The air inhaled from the sleeve by the rotation of the impeller is broken into bubbles through impeller agitation and evenly dispersed in the pulp. Under the action of reagents, ore particles are suspended, thus achieving the purpose of coal separation and ore dressing. However, the conventional agitation impellers of flotation machines still have the following deficiencies and defects:

[0003] 1. The impellers of conventional XJM type mechanical agitation flotation machines are mainly disc-shaped. The impeller is large and thick. Generally, the diameter of the commonly used disc-shaped impeller is between 500 mm and 1050 mm, and the mass is generally above 30 kg - 100 kg. Therefore, a motor with a relatively large power needs to be configured to drive it, which is one of the main reasons for the high energy consumption in the coal separation and ore dressing industries.

[0004] 2. There is no direct air pipeline arranged on the blades of the impeller of the conventional XJM type mechanical agitation flotation machine. The method of inhaling air is that when the impeller rotates, a negative pressure is generated, and the air is inhaled from the sleeve to the inner side of the center of the impeller, and then the air is broken by the rotation of the impeller to generate bubbles. Moreover, the rotational speed of the impeller of the conventional flotation machine is generally between 180 r / min and 300 r / min. Due to the low rotational speed of the impeller, the air intake is limited, the amount of foam generated is small, and the bubbles are large. Therefore, the contact probability between the pulp and the bubbles is small, the pulp mineralization effect becomes poor, the flotation efficiency is reduced, and the flotation effect is not good. Summary of the Utility Model

[0005] The purpose of the utility model is to provide a high-speed microbubble agitation impeller for a mechanical agitation flotation machine, which reduces the mass and volume of the impeller, reduces energy consumption, and improves flotation efficiency.

[0006] The technical solution adopted by the utility model is a high-speed microbubble agitation impeller for a mechanical agitation flotation machine, and the high-speed microbubble agitation impeller includes a main shaft seat hub;

[0007] A plurality of impeller air pipes extending circumferentially from the main shaft seat hub;

[0008] A tail wing arranged on one side of the impeller air pipe;

[0009] The stirring blade is fixedly connected to one end of the impeller air pipe away from the hub of the main shaft seat;

[0010] An air inlet is formed on the hub of the main shaft seat, and the air inlet is communicated with the inside of the impeller air pipe.

[0011] Preferably, the tail fin is crescent-shaped, and the cross-sectional area of the tail fin gradually decreases from the end close to the hub of the main shaft seat to the end far from the hub of the main shaft seat.

[0012] Preferably, stirring blades are fixedly connected to both the top and bottom of the impeller air pipe.

[0013] Preferably, the impeller air pipe and the stirring blade are arc-shaped.

[0014] Preferably, the impeller air pipe and the stirring blade are linear.

[0015] Preferably, the curvature of the impeller air pipe is the same as that of the stirring blade.

[0016] Preferably, the side of the stirring blade close to the hub of the main shaft seat is the inner edge of the blade, and the side of the stirring blade far from the hub of the main shaft seat is the outer edge of the blade. The inner edge of the blade is arc-shaped, and the outer edge of the blade is linear.

[0017] Preferably, the number of the impeller air pipes is 4 - 6.

[0018] Preferably, the diameter of the high-speed microbubble stirring impeller of the present invention is 200 mm - 500 mm, and the mass is 3 kg - 8 kg.

[0019] The beneficial effects of the present invention are as follows:

[0020] 1. Since the impeller structure is changed in the present invention, the mass of the impeller is reduced. The diameter of the impeller is 200 mm - 500 mm, and the mass is 3 kg - 8 kg. Therefore, the power load is reduced, the energy consumption is saved, and the flotation efficiency is improved.

[0021] 2. Since the impeller air pipe is arranged on the main rib of the impeller blade in the present invention, when the impeller speed reaches 900 - 1460 r / min, the natural air intake of the impeller is increased, the foaming amount is rich, and micron-sized bubbles are generated. The contact probability between the pulp and the bubbles is sufficient, the mineralization effect of the material is improved, and the flotation efficiency and flotation effect are improved. Description of the Drawings

[0022] Figure 1 It is a three-dimensional view of the high-speed microbubble stirring impeller of the present invention.

[0023] Figure 2Schematic diagram of the layout of the tail fin and the impeller air pipe of the high-speed microbubble stirring impeller of the present utility model.

[0024] Figure 3 Cross-sectional view of the high-speed microbubble stirring impeller of the present utility model.

[0025] Figure 4 Schematic diagram of the structure of the stirring impeller of Embodiment 2 of the present utility model.

[0026] In the figure: 1, spindle seat hub; 2, air inlet; 3, tail fin; 4, impeller air pipe; 5, stirring blade; 51, inner edge of the blade; 52, outer edge of the blade; 6, air outlet. Detailed implementation manners

[0027] The present utility model will be described in detail below in conjunction with the accompanying drawings and specific implementation manners.

[0028] Embodiment 1

[0029] As Figure 1 shown, the high-speed microbubble stirring impeller for a mechanical agitation flotation machine of the present utility model includes a spindle seat hub 1, a plurality of impeller air pipes 4 extending circumferentially from the spindle seat hub 1, a tail fin 3 disposed on one side of the impeller air pipes 4, and stirring blades 5. The stirring blades 5 are fixedly connected to an end of the impeller air pipes 4 away from the spindle seat hub 1. An air inlet 2 is provided on the spindle seat hub 1, and the air inlet 2 is in communication with the interior of the impeller air pipes 4.

[0030] The diameter of the high-speed microbubble stirring impeller of the present utility model is 200 mm - 500 mm, and the mass is 3 kg - 8 kg, thus reducing the power load, saving energy consumption, and reducing the operation cost.

[0031] The spindle seat hub 1 is a cylindrical hub. One end of the spindle seat hub 1 is in a closed state, and an air inlet 2 is provided at the other end. The air inlet 2 is in communication with the interior of the impeller air pipes 4. An air outlet 6 is further provided on the impeller air pipes 4. The air outlet 6 is the end of the impeller air pipes 4 away from the spindle seat hub 1, and the air outlet 6 is in communication with the interior of the impeller air pipes 4. During operation, gas enters the interior of the impeller air pipes 4 through the air inlet 2 and is then released from the air outlet 6.

[0032] The tail fin 3 is fixedly connected to the impeller air pipes 4 and the spindle seat hub 1. As Figure 1 and Figure 2 shown, the tail fin 3 is crescent-shaped, and its cross-sectional area gradually decreases from the end close to the spindle seat hub 1 to the end away from the spindle seat hub 1. The tail fin 3 can reduce the impact of water flow on the device, effectively reduce the fatigue damage of the stirring impeller, and extend the service life of the equipment.

[0033] The impeller air pipe 4 is hollow inside; in this embodiment, the high-speed microbubble stirring impeller is a backward-inclined impeller. Specifically, as Figure 2 shown, the shape of the impeller air pipe 4 is arc-shaped. The arc shape can better conform to the flow trajectory of the liquid, disperse the load, reduce the generation of eddy currents, thereby reducing energy loss, saving costs, and improving work efficiency.

[0034] The stirring blades 5, as Figure 3 shown, are fixedly connected to both the top and bottom of the impeller air pipe 4. The shape of the stirring blades 5 is arc-shaped, and its curvature is the same as that of the arc of the impeller air pipe 4. One side of the stirring blade 5 close to the main shaft seat hub 1 is the blade inner edge 51, and the side of the stirring blade 5 far from the main shaft seat hub 1 is the blade outer edge 52. The blade inner edge 51 is arc-shaped, and the blade outer edge 52 is straight. The blade outer edge 52 is flush with the air outlet 6 of the impeller air pipe 4. The advantages of setting the stirring blade 5 at one end of the impeller air pipe 4 far from the main shaft seat hub 1, setting the blade inner edge 51 as arc-shaped, and setting the blade outer edge 52 as straight are that while improving the stirring effect, the resistance during the operation of the stirring impeller is reduced, enabling the motor to operate at a higher speed, thereby reducing energy consumption and greatly saving the operating cost.

[0035] In this embodiment, there are 5 stirring blades 5, and the 5 stirring blades 5 are evenly spaced in the circumferential direction of the main shaft seat hub 1. The number of stirring blades 5 can also be 4 or 6, which can be selected according to actual needs.

[0036] In this embodiment, the main shaft seat hub 1, the rotating tail fin 3, the impeller air pipe 4, and the stirring blades 5 are integrally cast. During operation, the main shaft seat hub 1 is connected to the output shaft of the motor, and the output shaft of the motor rotates to drive the main shaft seat hub 1 to rotate. When the main shaft seat hub 1 rotates, the rotating tail fin 3, the impeller air pipe 4, and the stirring blades 5 rotate together.

[0037] The working principle of the present utility model is as follows:

[0038] First, the original ore after crushing and grinding forms pulp, and flotation reagents are added. The high-speed microbubble stirring impeller of the present utility model is started to fully stir and mix. Negative pressure is generated by the rotation of the impeller to suck in air. The air enters the inside of the impeller air pipe 4 through the air inlet 2 and releases a large number of tiny bubbles through the air outlet 6. At the same time, under the stirring action of the stirring blades 5, the pulp violently forms eddy currents, prompting the bubbles and ore particles to further fully collide and contact, forming mineralized bubbles. Using the selective adhesion effect between mineral particles and bubbles, the minerals float upward under the buoyancy of the bubbles and are scraped out, realizing the separation of minerals.

[0039] Embodiment 2

[0040] As Figure 4As shown, the difference between this embodiment and Embodiment 1 is that the high-speed microbubble stirring impeller in this embodiment is a star-shaped impeller. Specifically, the shape of the impeller air pipe 4 is linear, and the impeller air pipe 4 extends radially along the hub of the main shaft seat 1. Correspondingly, the stirring blades 5 at the top and bottom of the impeller air pipe 4 are also linear. The structure of the star-shaped impeller is simple, and the manufacturing and maintenance costs are relatively low.

[0041] In this embodiment, there are 6 stirring blades 5, and the 6 stirring blades 5 are evenly spaced in the circumferential direction of the hub of the main shaft seat 1.

[0042] The utility model reduces the weight of the impeller, decreases the volume of the impeller, and reduces the energy consumption. At the same time, it provides basic conditions for the impeller to achieve high-speed operation; the impeller of the utility model can achieve high-speed rotation of 900 r / min - 1460 r / min and generate negative pressure. The air intake of the impeller air pipe 4 is greatly increased compared with traditional impellers. The air outlet 6 can release micron-sized bubbles, and the amount of foaming is rich. The contact probability between the pulp and the bubbles is more sufficient, which greatly improves the mineralization effect of the material, and improves the flotation efficiency and flotation effect.

[0043] The components and structures not described in detail in the embodiment belong to well-known components, common structures or common means in this industry, and will not be described one by one here.

Claims

1. A high-speed microbubble stirring impeller for a mechanical agitation flotation machine, characterized in that, The high-speed microbubble stirring impeller includes a main shaft hub (1); A plurality of impeller air pipes (4) extending circumferentially from the main shaft hub (1); A tail wing (3) provided on one side of the impeller air pipe (4); Stirring blades (5), and the stirring blades (5) are fixedly connected to one end of the impeller air pipe (4) away from the main shaft hub (1); An air inlet (2) is formed on the main shaft hub (1), and the air inlet (2) is communicated with the inside of the impeller air pipe (4).

2. The high-speed microbubble stirring impeller for a mechanical stirring flotation machine according to claim 1, wherein The tail wing (3) is crescent-shaped, and the cross-sectional area of the tail wing (3) gradually decreases from the end close to the main shaft hub (1) to the end far from the main shaft hub (1).

3. The high-speed microbubble stirring impeller for a mechanical stirring flotation machine according to claim 1, characterized in that, Stirring blades (5) are fixedly connected to both the top and the bottom of the impeller air pipe (4).

4. The high-speed microbubble stirring impeller for a mechanical stirring flotation machine according to claim 1, characterized in that, The impeller air pipe (4) and the stirring blades (5) are arc-shaped.

5. The high-speed microbubble stirring impeller for a mechanical agitation flotation machine according to claim 1, wherein The impeller air pipe (4) and the stirring blades (5) are linear.

6. The high-speed microbubble stirring impeller for a mechanical stirring flotation machine according to claim 4, characterized in that, The curvature of the impeller air pipe (4) is the same as the curvature of the stirring blades (5).

7. The high-speed microbubble stirring impeller for a mechanical stirring flotation machine according to claim 1, wherein, One side of the stirring blade (5) close to the main shaft hub (1) is the blade inner edge (51), and the side of the stirring blade (5) far from the main shaft hub (1) is the blade outer edge (52). The blade inner edge (51) is arc-shaped, and the blade outer edge (52) is linear.

8. The high-speed microbubble stirring impeller for a mechanical stirring flotation machine according to claim 1, wherein, The number of the impeller air pipes (4) is 4 - 6.

9. The high-speed microbubble stirring impeller for a mechanical stirring flotation machine according to claim 1, characterized in that, The diameter of the high-speed microbubble stirring impeller is 200 mm - 500 mm, and the mass is 3 kg - 8 kg.

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