Multistage slurry pump tailings conveyor

Abstract

This application discloses a multi-stage slurry pump tailings conveying device, including a deep conical cavity, a thickener installed inside the deep conical cavity, a suction pipe connected to the bottom of the deep conical cavity, the suction pipe being connected to an underflow pump, and at least two underflow pumps connected to the bottom of the deep conical cavity via suction pipes. The suction pipe of each underflow pump is connected to a first discharge pipe, the first discharge pipe is connected to the inlet of a first booster pump, the outlet of the first booster pump is connected to an external discharge branch pipe, and the external discharge branch pipe is connected to the external discharge main pipe. By having multiple pumps working in series during the slurry conveying process, this device is applied to the production operation of transporting high-concentration suspension media. Compared with single-stage pumps for slurry conveying, the slurry can be conveyed by pressure transmission between the underflow pump and the booster pump to overcome the height difference and pipeline friction loss of the slurry during pipeline transport, which is beneficial to improving the conveying efficiency of tailings slurry.

Description

Technical Field

[0001] This utility model belongs to the field of mining slurry transportation technology, specifically relating to a multi-stage slurry pump tailings transportation device. Background Technology

[0002] A thickener is a solid-liquid separation device based on gravity settling. Its working principle is to increase the settling rate of solid particles in tailings by adding flocculants. In other words, in the tailings separation process, a high-efficiency thickener can effectively enhance the tailings processing and greatly accelerate the tailings processing progress.

[0003] The problem in practice is that tailings ponds are usually located in valleys or low-lying areas far from the concentrator to store tailings slurry. The head (pressure) that a single-stage slurry pump can provide is limited. For tailings transportation tasks that need to overcome a total head of hundreds or even thousands of meters (including geometric height differences and all pipeline friction losses), a single-stage pump cannot reach the required outlet pressure. Utility Model Content

[0004] This application proposes a multi-stage slurry pump tailings conveying device, which realizes the external discharge and conveying of tailings by means of relay pressurization of feed pumps, thereby improving the conveying efficiency of tailings slurry.

[0005] To achieve the above objectives, this utility model provides the following technical solution: A multi-stage slurry pump tailings conveying device includes a deep conical cavity, in which a thickener is installed. A suction pipe is connected to the bottom of the deep conical cavity and is connected to an underflow pump. At least two underflow pumps are connected to the bottom of the deep conical cavity via suction pipes. The suction pipe of each underflow pump is connected to a first discharge pipe, which is connected to the inlet of a first booster pump. The outlet of the first booster pump is connected to an external discharge branch pipe, which is connected to an external discharge main pipe.

[0006] In one embodiment of this application, an overflow groove is provided on the outer side of the top of the deep conical cavity.

[0007] In one embodiment of this application, a mounting bracket is provided on the upper part of the deep conical cavity.

[0008] In one embodiment of this application, a second relay booster pump is installed on the first slurry discharge pipe, and the second relay booster pump is connected to the main discharge pipe through an external discharge branch pipe.

[0009] In one embodiment of this application, flow meters are installed on the suction pipe, the first discharge pipe, the external discharge branch pipe, and the external discharge main pipe.

[0010] In one embodiment of this application, a concentration detector is installed on the suction pipe, the first discharge pipe, the external discharge branch pipe, and the external discharge main pipe.

[0011] In one embodiment of this application, the first and second relay booster pumps are feeding pumps.

[0012] In summary, the technical solution proposed in this application includes the following beneficial technical effects: This application connects the first discharge pipe to the inlet of the first relay booster pump. The first relay booster pump is used to further pressurize and transport the slurry in the first discharge pipe, so that the slurry enters the external discharge main pipe through the external discharge branch pipe, and then enters the tailings dam through the external discharge main pipe. By using multi-stage pumps working in series during the slurry transportation process, it is applied to the production operation of transporting high-concentration suspension media. Compared with single-stage pumps for transporting slurry, the slurry can be transported by pressure transmission between the underflow pump and the relay booster pump to overcome the height difference and pipeline friction loss of slurry during pipeline transportation, which is beneficial to improving the transportation efficiency of tailings slurry. Attached Figure Description

[0013] To more clearly illustrate the technical solutions in the embodiments of this application or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0014] Figure 1 A top view of a multi-stage slurry pump tailings conveying device provided in an embodiment of this application; Figure 2 A schematic diagram of the bottom structure of the deep conical cavity of a multi-stage slurry pump tailings conveying device provided in an embodiment of this application; Figure 3 A schematic diagram of the connection and cooperation structure between the slot and the booster pump of the multi-stage slurry pump tailings conveying device provided in an embodiment of this application; Figure 4 A schematic diagram of the top structure of the deep conical cavity of a multi-stage slurry pump tailings conveying device provided in an embodiment of this application.

[0015] In the figure: deep conical cavity 1, overflow groove 11, mounting bracket 12; Suction pipe 2; Bottom flow pump 3; First row of slurry pipes 4; First relay booster pump 5, second relay booster pump 51; External drainage branch pipe 6, external drainage main pipe 61. Detailed Implementation

[0016] To make the objectives, technical solutions, and advantages of the embodiments of this application clearer, the technical solutions in the embodiments of this application are described clearly and completely below. Obviously, the described embodiments are only some embodiments of this application, not all embodiments. Based on the embodiments in this application, all other embodiments obtained by those skilled in the art without creative effort are also within the scope of protection of this application.

[0017] It should be noted that in the description of this application, the terms "center", "longitudinal", "lateral", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", and "outer" indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are used only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this application.

[0018] In this application, the terms "installation," "connection," and "linking" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection between two components. Those skilled in the art will understand the specific meaning of these terms in this application based on the specific circumstances.

[0019] In the embodiments of this application, the terms "exemplary" or "for example" are used to indicate that something is an example, illustration, or description. Any embodiment or design that is described as "exemplary" or "for example" in the embodiments of this application should not be construed as being more preferred or advantageous than other embodiments or design. Specifically, the use of the terms "exemplary" or "for example" is intended to present the relevant concepts in a specific manner.

[0020] This embodiment provides a multi-stage slurry pump tailings conveying device, see reference. Figures 1-4 As shown, the system includes a deep conical cavity 1, in which a thickener is installed. A suction pipe 2 is connected to the bottom of the deep conical cavity 1, and the suction pipe 2 is connected to an underflow pump 3. At least two underflow pumps 3 are connected to the bottom of the deep conical cavity 1 through suction pipes 2. The suction pipe 2 of each underflow pump 3 is connected to a first discharge pipe 4. The first discharge pipe 4 is connected to the inlet of a first booster pump 5. The outlet of the first booster pump 5 is connected to an external discharge branch pipe 6, and the external discharge branch pipe 6 is connected to an external discharge main pipe 61.

[0021] In the above embodiment, the deep conical cavity 1 stores tailings slurry. A thickener is installed inside the deep conical cavity 1 to add flocculant, thereby increasing the settling rate of solid particles in the slurry. The solid particles settle to the bottom of the deep conical cavity 1, and a suction pipe 2 is connected to the bottom of the deep conical cavity 1. The suction pipe 2 is connected to an underflow pump 3, which is used to pump the slurry settled at the bottom of the deep conical cavity 1 into the suction pipe 2. Furthermore, at least two underflow pumps 3 are connected to the bottom of the deep conical cavity 1 through the suction pipe 2, i.e., not a single underflow pump 3. This increases the conveying power of the underflow pump 3 to the slurry, avoiding the pressure of a single underflow pump 3, reducing wear and tear, and extending the service life of the pump. On the other hand, if the underflow pump 3 needs to be inspected and maintained, other underflow pumps 3 can be temporarily replaced to prevent tailings from accumulating in the deep conical cavity 1 due to the slurry conveying line stopping. Furthermore, the first discharge pipe 4 is connected to the inlet of the first booster pump 5. The first booster pump 5 is used to further pressurize and transport the slurry in the first discharge pipe 4, so that the slurry enters the main discharge pipe 61 through the branch pipe 6, and then flows into the tailings dam through the main discharge pipe 61. By using multi-stage pumps working in series during the slurry transportation process, this method is applied to the production operation of transporting high-concentration suspension media. Compared with single-stage pumps for slurry transportation, the slurry can be transported by pressure transmission between the underflow pump 3 and the booster pump to overcome the height difference and pipeline friction loss of the slurry during pipeline transportation, which is beneficial to improving the transportation efficiency of tailings slurry.

[0022] In one embodiment of this application, see reference Figure 2 As shown, an overflow groove 11 is provided on the outer side of the top of the deep conical cavity 1.

[0023] In the above embodiment, an overflow trough 11 is arranged around the outer ring wall of the top of the deep cone cavity 1. The outer wall of the overflow trough 11 is higher than the top of the deep cone cavity 1. The thickener in the deep cone cavity 1 achieves solid-liquid separation of slurry through flocculation and gravity settling. The clarified liquid with lower density, i.e., overflow water, will rise to the top. The overflow trough 11 serves as an annular collection channel to collect and export this part of the clarified supernatant. The overflow water after solid-liquid separation has a low solid content and can be reused in the mineral processing process (such as grinding and flotation), which is beneficial to reducing fresh water consumption and wastewater treatment costs.

[0024] In one embodiment of this application, see [reference] Figure 4 As shown, a mounting bracket 12 is provided on the upper part of the deep conical cavity 1.

[0025] In the above embodiment, the mounting frame 12 is set at the upper part of the deep cone cavity 1. The mounting frame 12 is used to fix and support the thickener. The mounting frame 12 is set through the center of the deep cone cavity 1 to fix and suspend the thickener, so that the thickener runs stably in the center position in the deep cone cavity 1, and the slurry settling effect in the deep cone cavity 1 is more uniform.

[0026] In one embodiment of this application, see reference Figure 4 As shown, a second booster pump 51 is installed on the first discharge pipe 4, and the second booster pump 51 is connected to the main discharge pipe 61 through the external discharge branch pipe 6.

[0027] In the above embodiment, a second relay booster pump 51 is installed on the first slurry discharge pipe 4, so that two relay booster pumps are respectively set on the first slurry discharge pipe 4, namely the first relay booster pump 5 and the second relay booster pump 51. The second relay booster pump 51 can be used as a backup pump for the first relay booster pump 5. When the first relay booster pump 5 suddenly fails, such as mechanical seal leakage or bearing overheating, the second relay booster pump 51 can be started immediately. It can be automatically switched by PLC or manually switched to avoid interruption of slurry transportation, which would lead to sedimentation and blockage of the transportation pipeline, thereby improving the smooth operation of the tailings transportation device.

[0028] In one embodiment of this application, flow meters are installed on the suction pipe 2, the first discharge pipe 4, the external discharge branch pipe 6, and the external discharge main pipe 61.

[0029] In the above embodiments, the flow meter can be used to detect the real-time flow rate of slurry in the pipeline. The slurry has a critical settling velocity, for example, 1.5~2.5 m / s. If it is lower than the critical velocity, the slurry will settle and block the pipeline. The flow meter monitors the flow rate in real time. If the flow rate is lower than the preset value, the pump status can be adjusted in time to prevent pipeline blockage caused by particle deposition, which is beneficial to improving the stability of the conveying device operation.

[0030] In one embodiment of this application, a concentration detector is installed on the suction pipe 2, the first discharge pipe 4, the external discharge branch pipe 6, and the external discharge main pipe 61.

[0031] In the above embodiments, the concentration detector is used to detect the slurry concentration in the pipeline. For example, if the slurry concentration is greater than 70%, the slurry viscosity increases, which increases pipeline resistance and can easily cause pump overload, requiring adjustment. Furthermore, the concentration detector can be used in conjunction with a flow meter; the following is an example of such a combination: Example 1: An increase in slurry concentration and a decrease in flow rate within the pipeline indicate a risk of sedimentation within the pipeline.

[0032] Example 2: If the slurry concentration in the pipeline is normal, but the flow rate decreases or suddenly drops, it indicates a pump malfunction. Start the standby pump or repair the pump.

[0033] Example 3: Low slurry concentration and high flow rate in the pipeline indicate reduced slurry flocculation effect, requiring adjustment of the thickener flocculant dosage. In one embodiment of this application, the first relay booster pump 5 and the second relay booster pump 51 are feeding pumps.

[0034] In the above embodiments, compared with existing diaphragm pumps, the feed pump has a simpler structure, fewer vulnerable parts, and a lower failure rate, which can significantly reduce the frequency of equipment maintenance. In addition, all feed pumps are of the same model, and the quantity and types of spare parts in stock are also significantly reduced, which is beneficial to improving the efficiency of the relay booster pump.

[0035] In actual use of this application: A thickener is installed inside the deep cone cavity 1. The thickener is used to add flocculants to increase the settling rate of solid particles in the slurry. The solid particles settle to the bottom of the deep cone cavity 1. The bottom of the deep cone cavity 1 is connected to a suction pipe 2. The suction pipe 2 is connected to a bottom flow pump 3. The bottom flow pump 3 is used to pump the slurry settled at the bottom of the deep cone cavity 1 into the suction pipe 2. The bottom flow pump 3 pressurizes the slurry in the suction pipe 2 for the first time and delivers it to the first discharge pipe 4. The first discharge pipe 4 is connected to the inlet of the first relay booster pump 5. The first relay booster pump 5 is used to pressurize and deliver the slurry in the first discharge pipe 4 again, so that the slurry enters the external discharge main pipe 61 through the external discharge branch pipe 6, and then enters the tailings dam through the external discharge main pipe 61.

[0036] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of this application, and are not intended to limit them. Although this application has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some or all of the technical features therein. Such modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of this application.

Claims

1. A multi-stage slurry pump tailings conveying device, characterized in that, The system includes a deep conical cavity (1), in which a thickener is installed. A suction pipe (2) is connected to the bottom of the deep conical cavity (1). The suction pipe (2) is connected to an underflow pump (3). At least two underflow pumps (3) are connected to the bottom of the deep conical cavity (1) through suction pipes (2). The suction pipe (2) of each underflow pump (3) is connected to a first discharge pipe (4). The first discharge pipe (4) is connected to the inlet of a first booster pump (5). The outlet of the first booster pump (5) is connected to an external discharge branch pipe (6). The external discharge branch pipe (6) is connected to an external discharge main pipe (61).

2. The multi-stage slurry pump tailings conveying device according to claim 1, characterized in that, An overflow groove (11) is provided on the outer side of the top of the deep conical cavity (1).

3. The multi-stage slurry pump tailings conveying device according to claim 1, characterized in that, The upper part of the deep conical cavity (1) is provided with a mounting bracket (12).

4. The multi-stage slurry pump tailings conveying device according to claim 1, characterized in that, A second booster pump (51) is installed on the first slurry discharge pipe (4), and the second booster pump (51) is connected to the main discharge pipe (61) through the external discharge branch pipe (6).

5. The multi-stage slurry pump tailings conveying device according to claim 1, characterized in that, Flow meters are installed on the suction pipe (2), the first discharge pipe (4), the external discharge branch pipe (6) and the external discharge main pipe (61).

6. The multi-stage slurry pump tailings conveying device according to claim 5, characterized in that, Concentration detectors are installed on the suction pipe (2), the first discharge pipe (4), the external discharge branch pipe (6), and the external discharge main pipe (61).

7. The multi-stage slurry pump tailings conveying device according to claim 4, characterized in that, The first relay booster pump (5) and the second relay booster pump (51) are feeding pumps.

Images