Flotation column with dispersed ore pulp feeding device for molybdenum ore dressing

Abstract

The utility model discloses a flotation column with a dispersed ore pulp feeding device for molybdenum ore dressing, which comprises a flotation column, and the dispersed ore pulp feeding device is arranged in the flotation column; the dispersed ore pulp feeding device comprises an ore feeding pipe, an outlet of the ore feeding pipe is communicated with an inlet of a buffer pipe, an outlet of the buffer pipe is communicated with inlets of a plurality of ore distributing pipes, dispersing plates are arranged at outlets of the ore distributing pipes, and gaps are reserved between the dispersing plates and the outlets of the ore distributing pipes; and the dispersion plate is movably mounted at the outlet of the ore separation pipe through the adjusting screw and the limiting nut. The flotation column solves the problems that a traditional flotation column is large in ore feeding fluctuation, middlings and flotation reagents circulate in a large amount, foam is sticky and greasy, mechanical inclusion is serious, and flotation indexes are unstable, achieves the purposes that feeding ore pulp of the flotation column is uniform and dispersed, improves the selectivity of mineral particles of the flotation column and the mineralization effect of a collecting area, and improves the flotation efficiency. And the yield and the recovery rate of molybdenum products are improved.

Description

Technical Field

[0001] This utility model belongs to the field of mineral processing equipment technology, and relates to flotation columns, specifically to a flotation column with a dispersing slurry feeding device for molybdenum ore beneficiation. Background Technology

[0002] The feed rate, concentrate scraping rate, and tailings discharge rate of the flotation column are the main factors affecting the balance of middlings circulation and fluctuations in the production process. The concentrate scraping rate and tailings discharge rate are precisely controlled by the opening degree of the air valve and slurry valve and the set value of the froth layer in the automatic control system. A continuous and uniform feed rate is particularly important for balancing the middlings circulation, stabilizing the flotation process, and improving product recovery.

[0003] During the operation of the flotation column, the feed pipe enters from the side of the flotation column at a position below the height of the froth-slurry interface, and then flows out from the claw-shaped branch pipe connected to the end of the feed pipe. Due to fluctuations in feed and the limitations of the feeding method, the feed rate fluctuates significantly. When the feed rate is too high, it increases the amount of tailings returned for recycling; when the feed rate is too low, the amount of froth scraped is insufficient. Under the influence of gravity and the height difference, the slurry at the branch pipe outlet flows down in jets directly below the collecting zone of the flotation column. Some small-molecule mineral particles are carried to the collecting layer by the rising bubbles at the bottom of the flotation column and mineralized, rising to the froth layer. Most of the slurry enters the tailings and participates in the middlings recycling, resulting in insufficient scraping in the froth zone or overflow of bubbles in the flotation column, affecting the yield and recovery rate of molybdenum products and hindering smooth production. Summary of the Invention

[0004] To address the shortcomings of existing technologies, the purpose of this utility model is to provide a flotation column with a dispersing slurry feeding device for molybdenum ore beneficiation. This solves the technical problems in existing technologies that lead to a decrease in the yield and recovery rate of molybdenum products during molybdenum ore flotation due to large fluctuations in flotation feed, extensive circulation of middlings and flotation reagents, severe mechanical inclusions caused by sticky foam, and unstable flotation indicators.

[0005] To solve the above-mentioned technical problems, the present invention adopts the following technical solution:

[0006] A flotation column with a dispersing slurry feeding device for molybdenum ore beneficiation includes a flotation column, wherein the dispersing slurry feeding device is provided inside the flotation column.

[0007] The dispersed slurry feeding device includes a feed pipe, the outlet of which is connected to the inlet of a buffer pipe, the outlet of which is connected to the inlet of multiple branch pipes, and a dispersion plate is provided at the outlet of each branch pipe, with a gap between the dispersion plate and the outlet of the branch pipe.

[0008] The dispersion plate includes a dispersion plate body, which is a flat circular plate structure; multiple dispersion teeth are fixedly connected to the edge of the dispersion plate body, and the dispersion teeth are trapezoidal structures, with the multiple dispersion teeth evenly distributed along the circumferential direction of the dispersion plate body.

[0009] The main body of the dispersion plate has multiple elongated adjustment holes in the middle. Adjustment screws are movably installed in the adjustment holes. One axial end of the adjustment screw extends out of the adjustment hole and is fixedly connected to the outlet of the ore distribution pipe. The other axial end of the adjustment screw extends out of the adjustment hole and is fitted with a limit nut. The dispersion plate is movably installed on the dispersion plate mounting screw.

[0010] This utility model also has the following technical features:

[0011] The height of the gap between the outlet of the ore distribution pipe and the dispersion plate is 3.5 to 5.5 cm.

[0012] The number of adjustable elongated holes is three, and the included angle between the central axes of adjacent adjustable elongated holes is 60°.

[0013] The diameter of the buffer pipe is 2.5-3 times that of the feed pipe, and the height of the buffer pipe is 25-35cm; the diameter of the distribution pipe is 0.5 times that of the feed pipe.

[0014] The vertical distance between the feed pipe and the top of the flotation column is 1.5 to 2 meters.

[0015] The flotation column is equipped with a spray pipe at the top, which is arranged in a horizontal direction. Multiple nozzles are installed on the spray pipe and are evenly spaced in the horizontal direction. The top of each nozzle is connected to the spray pipe, and the bottom of the nozzle is the liquid outlet.

[0016] A liquid level measuring instrument is installed inside the top of the flotation column.

[0017] The flotation column is provided with a foam overflow trough at the top and a foam collection pipe at the bottom.

[0018] The bottom of the flotation column is provided with an air supply and foaming pipe, which is arranged in a horizontal direction; an air pump is provided at the air inlet end of the air supply and foaming pipe, and the air outlet end of the air supply and foaming pipe is connected to the flotation column.

[0019] The bottom of the flotation column is also equipped with a tailings pipe, the inlet of which is connected to the flotation column, and the outlet of which is equipped with a tailings collection pipe leading to the stirring tank; a positioner and a slurry valve are installed on the tailings pipe.

[0020] Compared with the prior art, this utility model has the following technical effects:

[0021] This invention adds a dispersing slurry feeding device to the traditional main-to-branch pipeline flotation column. The slurry flowing out through the branch pipe is dispersed into small-volume mineral particles by the action of the dispersing plate, which is convenient for air bubbles to carry and float. This solves the problems of large fluctuations in slurry feeding, large circulation of middlings and flotation reagents, serious mechanical inclusions in foam, and unstable flotation indicators in traditional flotation columns. It achieves the purpose of uniform slurry feeding and dispersing of slurry in flotation columns, improves the selectivity of mineral particles in flotation columns and the mineralization effect in the collecting zone, thereby increasing the yield and recovery rate of molybdenum products. Attached Figure Description

[0022] Figure 1 This is a schematic diagram of the overall structure of a flotation column with a dispersing slurry feed device used for molybdenum ore beneficiation.

[0023] Figure 2 This is a schematic diagram of a structure with a dispersed slurry feeding device.

[0024] Figure 3 This is a schematic diagram of the installation structure of the dispersion plate.

[0025] Figure 4 This is a schematic diagram of the dispersion plate structure; Figure 4 In the image, (A) and (B) show two different shapes of adjustable elongated holes.

[0026] Figure 5 This is a schematic diagram of the flotation column partitioning.

[0027] Figure 6 This is a schematic diagram showing the relative positions of the dispersion plates; Figure 6 In the diagram, (A) shows the relative position of the dispersion plate in its initial static state; (B) and (C) show the random tilt state of the dispersion plate.

[0028] The meanings of the labels in the diagram are as follows: 1-Flotation column, 2-Feed pipe, 3-Buffer pipe, 4-Divider pipe, 5-Dispersion plate, 6-Adjusting screw, 7-Limit nut, 8-Spray pipe, 9-Nozzle, 10-Level measuring instrument, 11-Foam overflow trough, 12-Foam collection pipe, 13-Air supply and foaming pipe, 14-Air pump, 15-Tailings pipe, 16-Positioner, 17-Slurry valve, 18-Tailings collection pipe, 19-Agitator, 20-Manual valve.

[0029] 501 - Dispersion plate body, 502 - Dispersion teeth, 503 - Adjustment elongated hole.

[0030] The vertical distance between the H-feed pipe and the top of the flotation column is 1.5-2m; the height of the gap between the outlet of the h-separation pipe and the dispersion plate is 3.5-5.5cm.

[0031] The specific content of this utility model will be further explained in detail below with reference to the embodiments. Detailed Implementation

[0032] It should be noted that all components and instruments in this utility model, unless otherwise specified, are those known in the art. For example, the level measuring instrument 10 is a conventional level measuring instrument known in the prior art. The slurry valve 17 and the manual valve 20 are both conventional regulating valves known in the prior art.

[0033] The following are specific embodiments of the present invention. It should be noted that the present invention is not limited to the following specific embodiments. All equivalent modifications made based on the technical solutions of this application fall within the protection scope of the present invention.

[0034] Example:

[0035] This embodiment provides a flotation column with a dispersing slurry feed device for molybdenum ore beneficiation, such as... Figure 1 and Figure 2 As shown, it includes a flotation column 1, and a dispersion slurry feeding device is provided inside the flotation column 1; the dispersion slurry feeding device includes a feed pipe 2, the outlet of the feed pipe 2 is connected to the inlet of a buffer pipe 3, the outlet of the buffer pipe 3 is connected to the inlet of multiple branch pipes 4, a dispersion plate 5 is provided at the outlet of the branch pipes 4, and a gap is left between the dispersion plate 5 and the outlet of the branch pipes 4.

[0036] like Figure 2 , Figure 3 and Figure 4 As shown, the dispersing plate 5 includes a dispersing plate body 501, which is a flat circular plate structure. Multiple dispersing teeth 502 are fixedly connected to the edge of the dispersing plate body 501. The dispersing teeth 502 are trapezoidal structures and are evenly distributed along the circumferential direction of the dispersing plate body 501. Multiple adjusting elongated holes 503 are opened in the middle of the dispersing plate body 501. Adjusting screws 6 are movably installed in the adjusting elongated holes 503. One axial end of the adjusting screw 6 extends out of the adjusting elongated hole 503 and is fixedly connected to the outlet of the ore distribution pipe 4. The other axial end of the adjusting screw 6 extends out of the adjusting elongated hole 503 and is fitted with a limit nut 7. The dispersing plate 5 is movably installed on the dispersing plate mounting screw 6.

[0037] In this embodiment, as Figure 5As shown, flotation column 1 is divided into three parts from top to bottom: froth zone, collecting zone, and circulation zone. The froth zone is used to enrich froth and improve the grade of the froth product [concentrate]. The collecting zone is mainly used to collect the target mineral particles carried by the rising bubbles, thereby improving the recovery rate. The circulation zone is mainly used to ensure that the pulp is evenly distributed and flows within the flotation column, ensuring sufficient contact and mixing between the pulp and the bubbles, which helps to improve flotation efficiency and recovery rate.

[0038] In this embodiment, the feed pipe 2, buffer pipe 3 (wider at the top and narrower at the bottom), branch pipe 4, and dispersion plate 5 together constitute a dispersed slurry feeding device. The buffer pipe 3 buffers the slurry from the feed pipe 2, eliminating pressure fluctuations in the feed pipe 2 and ensuring stable gravity-flow distribution of the slurry. Each branch pipe 4 is a bent pipe with a flange, and the head of the branch pipe 4 is connected to the buffer pipe 3 by a flange, facilitating maintenance, repair, and disassembly.

[0039] In this embodiment, the end of the ore distribution pipe 4 is connected to a dispersion plate 5 that is slightly larger than the pipe opening. The small stream of ore slurry flowing out of the ore distribution pipe 4 is blocked and diffused by the dispersion plate 5, and cut and dispersed along the regulating elongated hole 503 and the dispersion teeth 502. This facilitates the secondary dispersion and cutting of the ore slurry on the dispersion plate 5, making it easier for small volume ore slurry particles to be carried by rising air bubbles, shortening the time of collision and collection with air bubbles, optimizing the selectivity of ore particles, enhancing the flotation effect, and improving the yield and recovery rate of molybdenum products.

[0040] In this embodiment, as Figure 6 As shown, the dispersing plate 5 is movably installed at the outlet of the ore distribution pipe 4 via the adjusting screw 6 and the limiting nut 7. When the slurry flowing out of the ore distribution pipe 4 impacts the dispersing plate 5, the dispersing plate 5 will randomly tilt to disperse the material according to the difference in the force direction of the slurry. This not only reduces the impact and wear of the slurry on the dispersing plate, but also the dispersing teeth 502 facilitate the secondary cutting of the dispersed slurry into fine mineral particles, which are more easily and efficiently carried up by air bubbles during the falling process, thereby increasing the yield and grade of concentrate products.

[0041] As a specific and optional solution in this embodiment, the adjusting elongated hole 503 is a flat elliptical structure (e.g., Figure 4 As shown in (A), or a rectangular structure with rounded corners (such as...). Figure 4 As shown in (B), the adjusting elongated hole 503 ensures that the adjusting screw 6 can move quickly within the adjusting elongated hole 503, thereby quickly adjusting the inclination of the dispersing plate 5.

[0042] As one specific solution in this embodiment, such as Figure 6 As shown in (A), in the initial state, the outlet of the ore distribution pipe 4 is almost parallel to the dispersion plate 5, and the height h of the gap between the outlet of the ore distribution pipe 4 and the dispersion plate 5 is 3.5 to 5.5 cm.

[0043] As one specific solution in this embodiment, such as Figure 4 As shown, there are three adjusting elongated holes 503, and the included angle between the central axes of adjacent adjusting elongated holes 503 is 60°.

[0044] As a specific embodiment, the diameter of the buffer pipe 3 is 2.5 to 3 times the diameter of the feed pipe 2, and the height of the buffer pipe 3 is 25 to 35 cm; the diameter of the distribution pipe 4 is 0.5 times the diameter of the feed pipe 2.

[0045] As a specific embodiment, the vertical distance between the feed pipe 2 and the top of the flotation column 1 is 1.5 to 2 m.

[0046] As one specific solution in this embodiment, such as Figure 1 As shown, a spray pipe 8 is installed inside the top of the flotation column 1. The spray pipe 8 is arranged in the horizontal direction and has multiple nozzles 9. The multiple nozzles 9 are arranged at equal intervals in the horizontal direction. The top of the nozzles 9 is connected to the spray pipe 8, and the bottom of the nozzles 9 is the liquid outlet. The spray pipe 8 and the nozzles 9 together form a spraying device. The spraying device is used to wash the foam at the top of the flotation column, which can eliminate foam and remove impurities, and is beneficial to improving the grade of the concentrate.

[0047] As one specific solution in this embodiment, such as Figure 1 As shown, a liquid level measuring instrument 10 is installed inside the top of the flotation column 1. The liquid level measuring instrument 10 consists of a sensor probe, a reflector, a connecting rod, and a float. The float connected to the lower end of the connecting rod extends downward into the froth zone of the flotation column 1 (the hollow float is located between the surface of the slurry and the bottom of the froth layer, and the position of the liquid surface determines the position of the float). The upper end of the connecting rod is connected to the reflector, and the reflector of the liquid level measuring instrument 10 extends upward beyond the top of the flotation column 1. (The reflector moves up and down with the change of the liquid level. The sensor probe calculates the thickness of the froth layer by converting the distance the reflector moves up and down, and transmits it to the automatic control system in real time for display, which is convenient for production monitoring and operation of the liquid level). The measuring instrument 10 is used to detect the height of the liquid level in the flotation column (the thickness of the froth layer) and provide process parameter signals to the automatic control system, which is convenient for the automatic control system to monitor and operate the flotation column process.

[0048] As one specific solution in this embodiment, such as Figure 1 As shown, a foam overflow trough 11 is provided at the top of the flotation column 1, and a foam collection pipe 12 is provided at the bottom of the foam overflow trough 11. The foam overflow trough 11 and the foam collection pipe 12 are used to collect concentrate (foam) products.

[0049] As one specific solution in this embodiment, such as Figure 1As shown, a gas supply and foaming pipe 13 is provided at the bottom of the flotation column 1. An air tank 14 is provided at the air inlet end of the gas supply and foaming pipe 13, and the air outlet end of the gas supply and foaming pipe 13 is connected to the flotation column 1. In this embodiment, the air tank 14 and the gas supply and foaming pipe 13 together constitute a gas supply system foaming device, which is used to generate rising bubbles to carry fine mineral particles upward.

[0050] As one specific solution in this embodiment, such as Figure 1 As shown, a tailings pipe 15 is also provided at the bottom of the flotation column 1. The inlet of the tailings pipe 15 is connected to the flotation column 1, and a tailings collection pipe 18 is provided at the outlet of the tailings pipe 15, leading to the stirring tank 19. A positioner 16 and a slurry valve 17 are provided on the tailings pipe 15. A manual valve 20 is also provided on the tailings pipe 15. In this embodiment, the slurry valve 17 is automatically regulated by the positioner 16. By adjusting the opening of the slurry valve 17, the amount of tailings discharged is controlled to balance the level of the slurry. The tailings pipe 15, the positioner 16, the slurry valve 17, and the tailings collection pipe 18 together constitute a tailings discharge device, which is used to control the amount of tailings discharged and balance and stabilize the level of the flotation column.

[0051] The working process of this utility model is as follows:

[0052] The molybdenum ore slurry to be floated enters the feed pipe 2 by gravity flow. The slurry flows sequentially through the buffer pipe 3 and the distribution pipe 4, and then flows out from the gap between the outlet of the distribution pipe 4 and the dispersion plate 5. Under the action of the dispersion teeth 502 and the regulating elongated holes 503, most of the slurry is cut into fine mineral particles. As these fine mineral particles descend, they collide and adhere with the bubble collection zone that rises from the bottom of the flotation column. The mineralized bubbles rise and gather in the froth zone, while some larger or uncollected mineral particles sink and enter the tailings pipe 15. The entire flotation operation is a closed-loop process. The froth enters the next operation in sequence, and the tailings enter the mixing tank and return to the previous operation to participate in the flotation as middlings.

Claims

1. A flotation column with a dispersing slurry feeding device for molybdenum ore beneficiation, comprising a flotation column (1), characterized in that, The flotation column (1) is equipped with a dispersion slurry feeding device; The dispersed slurry feeding device includes a feed pipe (2), the outlet of the feed pipe (2) is connected to the inlet of the buffer pipe (3), the outlet of the buffer pipe (3) is connected to the inlet of multiple branch pipes (4), a dispersion plate (5) is provided at the outlet of the branch pipe (4), and a gap is left between the dispersion plate (5) and the outlet of the branch pipe (4). The dispersion plate (5) includes a dispersion plate body (501), which is a flat circular plate structure; the edge of the dispersion plate body (501) is provided with a plurality of dispersion teeth (502), which are trapezoidal structures, and the plurality of dispersion teeth (502) are evenly distributed along the circumferential direction of the dispersion plate body (501). The main body (501) of the dispersion plate has multiple adjustable elongated holes (503) in the middle position. Adjusting screws (6) are movably installed in the adjusting elongated holes (503). One axial end of the adjusting screw (6) extends out of the adjusting elongated hole (503) and is fixedly connected to the outlet of the ore distribution pipe (4). The other axial end of the adjusting screw (6) extends out of the adjusting elongated hole (503) and is fitted with a limit nut (7). The dispersion plate (5) is movably installed on the dispersion plate mounting screw (6).

2. The flotation column with a dispersing slurry feeding device for molybdenum ore beneficiation as described in claim 1, characterized in that, The height of the gap between the outlet of the ore distribution pipe (4) and the dispersion plate (5) is 3-5 cm.

3. The flotation column with a dispersing slurry feeding device for molybdenum ore beneficiation as described in claim 1, characterized in that, The number of the adjustable elongated holes (503) is three, and the included angle between the central axes of adjacent adjustable elongated holes (503) is 60°.

4. The flotation column with a dispersing slurry feeding device for molybdenum ore beneficiation as described in claim 1, characterized in that, The diameter of the buffer pipe (3) is 2.5 to 3 times that of the feed pipe (2), and the height of the buffer pipe (3) is 25 to 35 cm; the diameter of the distribution pipe (4) is 0.5 times that of the feed pipe (2).

5. The flotation column with a dispersing slurry feed device for molybdenum ore beneficiation as described in claim 1, characterized in that, The vertical distance between the feed pipe (2) and the top of the flotation column (1) is 1.5 to 2 m.

6. The flotation column with a dispersing slurry feed device for molybdenum ore beneficiation as described in claim 1, characterized in that, The top of the flotation column (1) is provided with a spray pipe (8), which is arranged in the horizontal direction. Multiple nozzles (9) are provided on the spray pipe (8), and the multiple nozzles (9) are arranged at equal intervals in the horizontal direction. The top of the nozzle (9) is connected to the spray pipe (8), and the bottom of the nozzle (9) is the liquid outlet.

7. The flotation column with a dispersing slurry feed device for molybdenum ore beneficiation as described in claim 1, characterized in that, A liquid level measuring instrument (10) is installed inside the top of the flotation column (1).

8. The flotation column with a dispersible slurry feeding device for molybdenum ore beneficiation as described in claim 1, characterized in that, The flotation column (1) is provided with a foam overflow trough (11) at the top and a foam collection pipe (12) at the bottom.

9. The flotation column with a dispersing slurry feed device for molybdenum ore beneficiation as described in claim 1, characterized in that, The bottom of the flotation column (1) is provided with an air supply foaming pipe (13), which is arranged in the transverse direction; an air pump (14) is provided at the air inlet end of the air supply foaming pipe (13), and the air outlet end of the air supply foaming pipe (13) is connected to the flotation column (1).

10. The flotation column with a dispersible slurry feeding device for molybdenum ore beneficiation as described in claim 1, characterized in that, The bottom of the flotation column (1) is also provided with a tailings pipe (15), the inlet of the tailings pipe (15) is connected to the flotation column (1), and a tailings collection pipe (18) is provided at the outlet of the tailings pipe (15), which leads to the stirring tank (19); a positioner (16) and a slurry valve (17) are provided on the tailings pipe (15).

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