Tailing sand bailing pipeline system

Abstract

The utility model discloses a tailing bailing pipeline system, relates to the technical field of mineral processing technologies, and aims to solve the problem that part of recyclable particles with the size fraction of + 0.045 mm exist in tailings discharged from a fine sand tailing pump station to a tailing pond and need to be utilized in a proper backflow mode. The system comprises a pump station used for conveying mineral separation raw materials to pretreatment equipment, wherein the pretreatment equipment is connected with a first screening device and a second screening device; the tailing conveying pipe is used for conveying screened tailings to a tailing pond, the tailing conveying pipe sequentially comprises a turbulent flow section and a laminar flow section in the conveying direction, an outlet is formed in the lower end of any position of the laminar flow section and connected with a circulating pipe, and the pipe diameter of the circulating pipe is smaller than that of the tailing conveying pipe; the outlet end of the circulating pipe communicates with the position between the feeding end of the pump station and the feeding end of the first screening device. The device is simple and reasonable in structure, small in change on the basis of the existing tailing production process, easy to implement, wide in applicability and beneficial to more efficient utilization of resources.

Description

Technical Field

[0001] The utility model relates to the technical field of ore dressing technology, in particular to a tailings sand bailing pipeline system. Background Art

[0002] As one of the important processes in modern mine dressing plants, tailings treatment can not only improve resource utilization efficiency and protect the environment, but also ensure safe production, comply with legal regulations, and even create benefits for the dressing plant. Many dressing plants attach great importance to the research and development and application of tailings treatment technology to achieve sustainable development.

[0003] In the prior art, the undersized material is transported from the relay pump station to the pre-sedimentation tank, and then to the tailings pond through the linear screen. However, in the tailings dredging process, the undersized tailings enter the fine sand tailings pump station and are discharged to the tailings pond. After testing, there are still some recoverable +0.045mm particle size particles in the slurry. This part has certain economic value, such as being used to make cement concrete. If it can be effectively utilized, it can improve resource utilization while bringing economic benefits, and is more conducive to establishing a good image of the mineral processing enterprise; however, directly returning all the part discharged to the tailings pond will cause the process to be bloated, and the energy consumption of tailings treatment will be greatly increased, the treatment efficiency will be greatly reduced, and the economic benefits will be poor; therefore, a tailings dredging pipeline system is urgently needed to solve this problem. Utility Model Content

[0004] The utility model aims to provide a tailings sand bailing pipeline system to solve the problem that there are some recoverable +0.045mm particle size particles in the tailings discharged from the fine sand tailings pump station to the tailings pond, which need to be utilized in a suitable reflux method.

[0005] To achieve the above-mentioned purpose, the utility model provides the following technical solutions: a tailings bailing pipeline system, including a pump station for conveying mineral processing raw materials to a pretreatment device, wherein the discharge direction of the pretreatment device is divided into two parts, one part is connected to a tailings discharge pipe for discharging to a tailings pond, and the other part is connected to a pipe for material to be screened, which is sequentially connected to a first screening device and a second screening device; the pipeline system also includes a tailings conveying pipe for conveying the screened tailings to the tailings pond, the tailings conveying pipe includes a turbulent section and a laminar section in sequence along the conveying direction, an outlet is opened at the lower end at any point of the laminar section and is connected to a circulation pipe, the diameter of the circulation pipe is smaller than the diameter of the tailings conveying pipe, and the outlet end of the circulation pipe is connected to a point between the feed end of the pump station and the feed end of the first screening device.

[0006] Preferably, the outlet end of the circulation pipe is connected to the feed end of the pump station, the feed end of the pretreatment equipment or the feed end of the first screening device which is closest to the connection between the circulation pipe and the tailings conveying pipe.

[0007] Preferably, the connection point between the circulation pipe and the tailings conveying pipe is located at one end of the laminar flow section of the tailings conveying pipe close to the turbulent flow section.

[0008] Preferably, in any of the above schemes, the pretreatment equipment is a pre-sedimentation tank, the first screening device is a cyclone, the second screening device is a linear screen, and the screened product of the linear screen is a particle size of +0.045 mm.

[0009] In the above scheme, the material discharged from the linear screen is passed to the fine sand tailings pump station, the two ends of the tailings conveying pipe are respectively connected to the fine sand tailings pump station and the tailings pond, and the turbulent section of the tailings conveying pipe is connected to a slurry pump for conveying materials.

[0010] Preferably, the angle between the slurry flow direction at the inlet end of the circulation pipe and the slurry flow direction at the connected tailings conveying pipe is an acute angle.

[0011] In the above solution, a more preferred embodiment is that a reinforcing component is fixedly provided on the outside of the connection between the circulation pipe and the tailings conveying pipe.

[0012] Further preferably, the reinforcing component adopts an alloy backpack or a grouting material backpack.

[0013] Compared with the prior art, the beneficial effects of the utility model are:

[0014] 1. The tailings sand bailing pipeline system has a simple and reasonable structure. It requires little change on the basis of the existing tailings production process. It only needs to open a hole and add a pipeline. It is easy to implement and has a wide applicability. As long as the tailings conveying pipe has a laminar flow section, it can be modified and upgraded.

[0015] 2. The tailings sand bailing pipeline system does not require additional power equipment, and the modification cost is low. After the modification, it can effectively reduce the content of large particles transported to the tailings pond by the tailings conveying pipe. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 This is a schematic diagram of the connection of a pipeline system according to an embodiment of the present utility model;

[0017] Figure 2 This is a schematic diagram of a top view of the cross-sectional structure of the connection between the circulation pipe and the tailings conveying pipe in the embodiment;

[0018] Figure 3 for Figure 2 A schematic diagram of the main structure of the connection shown;

[0019] Figure 4 This is a schematic diagram of the position where the circulation pipe of the utility model should be set. DETAILED DESCRIPTION

[0020] A tailings production pipeline system in the mineral processing process can be found in Figure 1, which includes a pump station for conveying the mineral processing raw materials to the pretreatment equipment, wherein the discharge direction of the pretreatment equipment is divided into two parts, one part is connected to the tailings discharge pipe for discharging to the tailings pond, and the other part is connected to the material pipe to be screened, which is sequentially connected with the first screening device and the second screening device; this pipeline system also includes a tailings conveying pipe for conveying the tailings screened by the first screening device and the second screening device to the tailings pond; wherein the screened product of the second screening device, that is, the output is a particle size of +0.045mm;

[0021] The utility model is improved under the above existing pipeline system conditions, a tailings sand dredging pipeline system, the tailings conveying pipe includes a turbulent section and a laminar section in sequence along the conveying direction (see Figure 4 ), an outlet is opened at any lower end of the laminar flow section and is connected to a circulation pipe, the diameter of the circulation pipe is smaller than the diameter of the tailings conveying pipe, the outlet end of the circulation pipe is connected to the feed end of the pump station to the feed end of the first screening device, preferably, the outlet end of the circulation pipe is connected to the feed end of the pump station, the feed end of the pretreatment equipment or the feed end of the first screening device, which is closest to the connection between the circulation pipe and the tailings conveying pipe (i.e. the shortest circulation pipe), and generally there is no need to set up an additional power delivery pump.

[0022] In a preferred embodiment, the connection between the circulation pipe and the tailings conveying pipe is located at one end of the laminar flow section of the tailings conveying pipe close to the turbulent flow section, which can reduce the energy consumption of transportation before entering the circulation pipe.

[0023] Of course, the improvements of the utility model are not only applicable to products with a particle size of +0.045mm, but this particle size can be directly sold as a product. According to the economic value requirements of the output, the pipeline system of the utility model can also be applied to other tailings production processes, and new demands that may arise in the future are not ruled out. For example, assuming that +0.074 and +0.15mm products can be used as raw materials for a certain product, the tailings production process will also change accordingly. At that time, the pipeline system of the utility model can still be used to reduce the content of +0.074 and +0.15mm particles transported to the tailings pond by the tailings conveying pipe. Therefore, the +0.045mm particle size should not be the only limitation of the utility model.

[0024] In addition, the present invention has other preferred implementation modes, which are further described below in conjunction with the embodiments.

[0025] Example:

[0026] The tailings production construction project of a concentrator in Aoshan Mine, Ma'anshan, Anhui Province uses a 3-0.045mm particle size process. After the tailings raw materials are pre-treated in the pre-sedimentation tank from the relay pump station, the overflow is directly sent to the Aoshan Lake tailings pond, and the lower layer is transported to the hydrocyclone for classification and concentration, and then dehydrated by the linear screen to select +0.045mm particle size particles. The tailings from the hydrocyclone and the linear screen are passed to the fine sand tailings pump station. The tailings conveying pipe adopts a DN630 pipe, and its two ends are respectively connected to the fine sand tailings pump station and the Aoshan Lake tailings pond. The turbulent section of the tailings conveying pipe is connected to a slurry pump for conveying materials;

[0027] Through the analysis of the long-term sampling results of particle size, in the slurry injected into the relay pump station, the +0.045mm particle size accounts for about 50%-60%, while the +0.045mm particle size of the tailings of the cyclone and linear screen accounts for about 15%-20%, which has the significance of recycling.

[0028] The tailings discharge end of the cyclone and linear screen is about 2km away from the Aoshanhu tailings pond. Due to the long distance and long pipeline, the slurry in the pipeline has stabilized in the middle section. The slurry in the pipeline has a turbulent section and a laminar section, and the particle size is stratified in the laminar section.

[0029] The scheme in the above implementation mode is adopted for upgrading and transformation. The lower part of the tailings conveying pipe is opened after the turbulent section is changed to the laminar section, and the circulation pipe is welded and connected to guide the slurry rich in large particles at the bottom to return to the relay pump station more than ten meters away; among them, if Figure 2 As shown, the circulation pipe uses a relatively thin DN100 pipe (because only a part of the slurry needs to be circulated). In order to facilitate flow diversion and reduce resistance and impact, refer to Figure 3 The angle between the slurry flow direction at the inlet end of the circulation pipe and the slurry flow direction at the connected tailings conveying pipe is an acute angle. For reference only, a hole is drilled on the lower wall of the DN630 pipe, and the short axis of the elliptical aperture is enlarged to 95mm. The long axis is parallel to the flow direction in the pipe, and the length is determined according to the inclination angle of the external pipe; further, an alloy backpack is fixed on the outside of the connection between the circulation pipe and the tailings conveying pipe as a reinforcement component, and other reinforcement methods such as grouting backpack can also be used. The purpose is to cope with impact force and wear, improve operation stability and extend service life.

[0030] After the transformation, the long-term particle size sampling results of the slurry transported by the tailings conveying pipe to the Aoshan Lake tailings pond were analyzed, and the +0.045mm particle size contained was less than 10%, which was a significant improvement compared with the previous 15%-20%, proving that more +0.045mm particle size particles were produced as products.

[0031] The above are only preferred embodiments of the present invention, but the protection scope of the present invention is not limited thereto. Any changes or substitutions that can be easily thought of by a person skilled in the art within the technical scope disclosed by the present invention should be included in the protection scope of the present invention. Therefore, the protection scope of the present invention should be based on the protection scope defined by the claims.

[0032] The matters not described in detail in the present invention are all known technologies to those skilled in the art.

Claims

1. A tailings dredging pipeline system, comprising a pump station for conveying ore dressing raw materials to a pretreatment device, wherein the discharge direction of the pretreatment device is divided into two parts, one part is connected to a tailings discharge pipe for discharge to a tailings pond, and the other part is connected to a material pipe to be screened, which is sequentially connected to a first screening device and a second screening device; the pipeline system also includes a tailings conveying pipe for conveying the screened tailings to the tailings pond, characterized in that: The tailings conveying pipe includes a turbulent section and a laminar section in sequence along the conveying direction. An outlet is opened at the lower end of any point in the laminar section and is connected to a circulation pipe. The diameter of the circulation pipe is smaller than the diameter of the tailings conveying pipe. The outlet end of the circulation pipe is connected to the feed end of the pump station to the feed end of the first screening device.

2. A tailings sand bailing pipeline system according to claim 1, characterized in that: The outlet end of the circulation pipe is connected to the one of the feed end of the pump station, the feed end of the pretreatment equipment or the feed end of the first screening device which is closest to the connection between the circulation pipe and the tailings conveying pipe.

3. A tailings sand bailing pipeline system according to claim 2, characterized in that: The connection point between the circulation pipe and the tailings conveying pipe is located at one end of the laminar flow section of the tailings conveying pipe close to the turbulent flow section.

4. A tailings bailing pipeline system according to any one of claims 1 to 3, characterized in that: The pretreatment equipment is a pre-sedimentation tank, the first screening device is a cyclone, the second screening device is a linear screen, and the screened product of the linear screen is +0.045mm particle size.

5. A tailings sand bailing pipeline system according to claim 4, characterized in that: The material discharged from the linear screen is passed to the fine sand tailings pump station, the two ends of the tailings conveying pipe are respectively connected to the fine sand tailings pump station and the tailings pond, and the turbulent section of the tailings conveying pipe is connected to a slurry pump for conveying materials.

6. A tailings bailing pipeline system according to claim 1, characterized in that: The angle between the slurry flow direction at the inlet end of the circulation pipe and the slurry flow direction at the connected tailings conveying pipe is an acute angle.

7. A tailings bailing pipeline system according to claim 6, characterized in that: A reinforcing component is fixedly provided outside the connection between the circulation pipe and the tailings conveying pipe.

8. A tailings bailing pipeline system according to claim 7, characterized in that: The reinforcing component adopts an alloy backpack or a grouting material backpack.

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