Foam scraping device of clean coal flotation machine

Abstract

The utility model discloses a foam scraping device of a clean coal flotation machine, which comprises a cylindrical shell, a flotation column is concentrically arranged in the shell, a foam groove is arranged outside the shell, an overflow hole is arranged on the inner wall of the shell, a floating disc component is coaxially arranged in the shell, and the foam groove is arranged in the shell. The floating disc assembly floats on the liquid level of the flotation machine, vortex air holes are formed in the floating disc assembly, the vortex air holes are used for blowing ore pulp foam to the overflow holes, and the floating disc assembly is connected with a compressed air pipeline; the flotation machine has the advantages that the flotation machine is simple in structure, the floating disc assembly is arranged in the center of the liquid level of the flotation machine, the vortex air hole is formed in the floating disc assembly, foam on the liquid level is blown to the overflow hole through the vortex air hole, ore pulp foam on the liquid level obtains kinetic energy of vortex, the blowing coverage area of the foam is large, and the flotation effect is good. The overflow speed of ore pulp foam is greatly improved, so that the flotation efficiency of the flotation machine is improved.

Description

Technical field:

[0001] The utility model relates to the technical field of flotation machine equipment, in particular to a bubble scraping device of a clean coal flotation machine. Background technology:

[0002] Flotation is a technical method for separating useful minerals from ores based on the physical and chemical properties of the mineral particle surfaces. Flotation is achieved through a flotation machine. The flotation machine is driven by an electric motor with a V-belt to drive the impeller to rotate, generating a centrifugal effect to form a negative pressure. On the one hand, sufficient air is sucked in to mix with the slurry, and on the other hand, the slurry is stirred and mixed with the drug. At the same time, the foam is refined, so that the minerals adhere to the foam and float to the surface of the slurry to form mineralized foam. In order to improve the fluidity of the foam and make the foam overflow more quickly into the overflow tank, in the existing technology, a mechanical flap structure scraper is usually installed at the overflow tank of the flotation machine to perform the scraping operation. However, this scraper is difficult to cover the entire liquid surface. Most of the pulp foam still relies on gravity to move to the scraper position. The foam overflow speed needs to be further improved. Utility model content:

[0003] The utility model aims to provide a foam scraping device for a clean coal flotation machine to solve the technical problems in the prior art of low flotation efficiency caused by insufficient power and slow overflow speed of pulp foam in flotation machines.

[0004] The content of the utility model: A foam scraping device for a clean coal flotation machine, which includes a cylindrical shell, a flotation column is concentrically arranged in the shell, a foam tank is arranged outside the shell, an overflow hole is opened on the inner wall of the shell, a float assembly is coaxially arranged in the shell, the float assembly floats on the liquid surface of the flotation machine, vortex air holes are arranged in the float assembly, the vortex air holes are used to blow slurry foam toward the overflow hole, and the float assembly is connected to a compressed air pipeline.

[0005] Furthermore, the floating plate assembly includes a floating plate, an air collecting ring groove is opened on the floating plate, and a plurality of vortex air holes are opened on the outer edge of the floating plate in a circumferential direction. The axis of the vortex air hole does not intersect with the axis of the floating plate, and the vortex air hole is connected to the air collecting ring groove. A float is fixedly installed on the floating plate, and an air intake groove is provided in the float. The air intake groove is connected to the air collecting ring groove. An air intake pipe is connected to the float, and the air intake pipe is connected to the air intake groove.

[0006] Furthermore, the center hole of the float plate is connected to the flotation column in an up-and-down sliding manner, and the flotation column and the center hole of the float plate are clearance-fitted.

[0007] Furthermore, the air intake pipe is tangent to the air intake groove, and the air intake direction of the air intake pipe is the same as the vortex direction of the vortex air hole.

[0008] Furthermore, an adjusting cone is installed below the floating plate, a counterweight groove is provided in the adjusting cone, and a counterweight is installed in the counterweight groove.

[0009] Furthermore, sealing gaskets are installed between the floating plate and the buoy, and between the floating plate and the adjusting cone.

[0010] Furthermore, the axis of the overflow hole does not intersect with the axis of the shell, and the inclination direction of the overflow hole is the same as the vortex direction of the vortex hole.

[0011] Furthermore, limit plates are installed on the outer wall of the flotation column and the central hole of the float plate.

[0012] The beneficial effects of the utility model are as follows: the utility model has a simple structure, a float assembly is arranged at the center of the liquid surface of the flotation machine, and vortex air holes are designed on the float assembly, and the foam on the liquid surface is blown to the overflow hole through the vortex air holes, so that the slurry foam on the liquid surface obtains the kinetic energy of the vortex, the foam blowing covers a large area, and the overflow speed of the slurry foam is greatly improved, thereby improving the flotation efficiency of the flotation machine. Description of the drawings:

[0013] Figure 1 It is a top view of the utility model;

[0014] Figure 2 for Figure 1 Section view along AA;

[0015] Figure 3 This is an exploded view of the float assembly;

[0016] Figure 4 Schematic diagram of the installation position of the limit plate;

[0017] In the figure, the shell 1, foam tank 2, overflow hole 3, float plate 4, air collecting ring groove 6, air inlet groove 7, air inlet pipe 8, vortex air hole 9, float 10, flotation column 11, adjusting cone 12, counterweight groove 13, and limit plate 14. Specific implementation method:

[0018] like Figure 1 and Figure 2As shown, a foam scraping device of a clean coal flotation machine includes a cylindrical shell 1, a flotation column 11 is concentrically arranged in the shell 1, a foam tank 2 is arranged outside the shell 1, an overflow hole 3 is opened on the inner wall of the shell 1, a float assembly is coaxially arranged in the shell 1, the float assembly floats on the liquid surface of the flotation machine, and a vortex air hole 9 is arranged in the float assembly. The vortex air hole 9 is used to blow the slurry foam toward the overflow hole 3, and the float assembly is connected to the compressed air pipeline.

[0019] like Figure 3 As shown, the floating plate assembly includes a floating plate 4, an air collecting annular groove 6 is opened on the floating plate 4, and a plurality of vortex air holes 9 are uniformly distributed along the circumferential direction on the outer edge of the floating plate 4, the axis of the vortex air hole 9 does not intersect with the axis of the floating plate 4, the vortex air hole 9 is connected with the air collecting annular groove 6, a float 10 is fixedly mounted on the floating plate 4, an air inlet groove 7 is provided in the floating plate 10, the air inlet groove 7 is connected with the air collecting annular groove 6, an air inlet pipe 8 is connected to the float 10, and the air inlet pipe 8 is connected with the air inlet groove 7; the center hole of the floating plate 4 is slidably connected to the flotation column 11 up and down, and in order to ensure that the floating plate 4 floats with the liquid surface, the flotation column 11 and the center hole of the floating plate 4 are clearance-fitted; in order to further improve the vortex kinetic energy, the air inlet pipe 8 is tangent to the air inlet groove 7, and the air inlet direction of the air inlet pipe 8 is the same as the vortex direction of the vortex air hole 9.

[0020] In order to adjust the draft of the floating plate 4, as Figure 3 As shown, an adjusting cone disk 12 is installed below the floating plate 4, a counterweight groove 13 is opened in the adjusting cone disk 12, and a counterweight is installed in the counterweight groove 13; in order to improve the sealing of the compressed air and maintain the high pressure of the air flow, sealing gaskets are installed between the floating plate 4 and the buoy 10, and between the floating plate 4 and the adjusting cone disk 12.

[0021] In order to make the pulp foam enter the overflow hole 3 more quickly, Figure 1 As shown, the axis of the overflow hole 3 does not intersect with the axis of the housing 1 , and the inclination direction of the overflow hole 3 is the same as the vortex direction of the vortex hole 9 .

[0022] like Figure 4 As shown, in order to prevent the float 4 from excessively rotating due to airflow, thereby affecting the connection of the compressed air pipeline, limit plates 14 are installed on the outer wall of the flotation column 11 and the center hole of the float 4.

[0023] When doing specific work, such as Figures 1 to 3As shown, during flotation, compressed air passes through the air inlet pipe 8, the air inlet groove 7, the air collecting ring groove 6 in sequence, and is finally blown out through the vortex air hole 9, so that the slurry on the liquid surface obtains the kinetic energy of the vortex outward, causing the slurry foam to flow quickly to the overflow hole 3, thereby improving the collection efficiency of the slurry foam.

[0024] The above are only preferred examples of the present invention and are not intended to limit the present invention. Any modifications, equivalent replacements, improvements, etc. 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 flotation scraping device for a clean coal flotation machine, comprising a cylindrical housing (1), a flotation column (11) concentrically arranged inside the housing (1), a foam tank (2) arranged outside the housing (1), and an overflow hole (3) opened on the inner wall of the housing (1), characterized in that: A float assembly is coaxially arranged in the housing (1), the float assembly floats on the liquid surface of the flotation machine, a vortex air hole (9) is arranged in the float assembly, the vortex air hole (9) is used to blow pulp foam toward the overflow hole (3), and the float assembly is connected to a compressed air pipeline.

2. The bubble scraping device of a clean coal flotation machine according to claim 1, characterized in that: The floating plate assembly includes a floating plate (4), an air collecting annular groove (6) is provided on the floating plate (4), a plurality of vortex air holes (9) are uniformly distributed along the circumferential direction on the outer edge of the floating plate (4), the axis of the vortex air hole (9) does not intersect with the axis of the floating plate (4), the vortex air hole (9) is connected to the air collecting annular groove (6), a buoy (10) is fixedly installed on the floating plate (4), an air inlet groove (7) is provided in the buoy (10), the air inlet groove (7) is connected to the air collecting annular groove (6), an air inlet pipe (8) is connected to the buoy (10), and the air inlet pipe (8) is connected to the air inlet groove (7).

3. The bubble scraping device of a clean coal flotation machine according to claim 2, characterized in that: The center hole of the float (4) is connected to the flotation column (11) in an up-and-down sliding manner, and the flotation column (11) and the center hole of the float (4) are clearance-fitted.

4. The bubble scraping device of a clean coal flotation machine according to claim 2, characterized in that: The air inlet pipe (8) is tangent to the air inlet groove (7), and the air inlet direction of the air inlet pipe (8) is the same as the vortex direction of the vortex air hole (9).

5. The bubble scraping device of a clean coal flotation machine according to claim 2, characterized in that: An adjusting cone disk (12) is installed below the floating disk (4), a counterweight groove (13) is provided in the adjusting cone disk (12), and a counterweight is installed in the counterweight groove (13).

6. The bubble scraping device of a clean coal flotation machine according to claim 5, characterized in that: Sealing gaskets are installed between the floating plate (4) and the buoy (10), and between the floating plate (4) and the regulating cone (12).

7. The bubble scraping device of a clean coal flotation machine according to claim 1, characterized in that: The axis of the overflow hole (3) does not intersect with the axis of the housing (1), and the inclination direction of the overflow hole (3) is the same as the vortex direction of the vortex air hole (9).

8. The bubble scraping device of a clean coal flotation machine according to claim 3, characterized in that: Limiting plates (14) are installed on the outer wall of the flotation column (11) and the central hole of the float plate (4).

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