Metal mine tailings dewatering device

Abstract

The utility model discloses belong to tailing dewatering purification technical field, concretely is a kind of metal mine tailing dewatering device, including primary cyclone classification unit, receiving flotation tailings and separating out overflow containing fine particle and bottom flow containing coarse particle, dehydration screening unit is connected with the bottom flow of the primary cyclone classification unit, for separating bottom flow into coarse sand on screen and undersize, secondary cyclone classification unit is connected with the undersize outlet of the dehydration screening unit, for undersize is classified again, closed circuit pipeline, the sand of the secondary cyclone classification unit is returned to the dehydration screening unit feed end, coarse sand collecting bin receives the coarse sand on screen of the dehydration screening unit and the sand of secondary cyclone classification unit respectively, and undersize is classified again by secondary cyclone, significantly improve +200 mesh coarse sand recovery rate, and through the design of anti-blocking closed circuit pipeline, combine mechanical propulsion and pneumatic auxiliary conveying, solve the problem of high-concentration tailings circulation easy to block.

Description

Technical Field

[0001] This utility model relates to the field of tailings dewatering technology, specifically a tailings dewatering device for metal mines. Background Technology

[0002] In the beneficiation process of metal mines, flotation tailings typically contain a large number of fine particles and a small number of coarse particles. Traditional treatment methods employ a simple classification process using hydrocyclones and dewatering screens, which has the following problems:

[0003] 1. Low coarse sand recovery rate: Because the material under the dewatering screen still contains some +200 mesh particles, it directly enters the filling system, resulting in the loss of coarse sand;

[0004] 2. The filling quality is affected: coarse sand entering the filling grout may cause pipe wear or uneven strength of the filling body;

[0005] 3. Resource waste: Coarse sand (such as quartz, feldspar, etc.) has reuse value (such as building materials, backfill), but traditional processes have failed to fully recover it. Therefore, there is an urgent need to provide a dewatering device for tailings in metal mines. Utility Model Content

[0006] The purpose of this section is to outline some aspects of the embodiments of this utility model and to briefly introduce some preferred embodiments. Simplifications or omissions may be made in this section, as well as in the abstract and title of this application, to avoid obscuring the purpose of these documents; however, such simplifications or omissions should not be used to limit the scope of this utility model.

[0007] Therefore, the purpose of this utility model is to provide a metal mine tailings dewatering device that significantly improves the recovery rate of +200 mesh coarse sand by reclassifying the undersize material through a two-stage hydrocyclone, and solves the problem of easy clogging in the circulation of high-concentration tailings by using a closed-loop circulation pipeline design to prevent clogging, combined with mechanical propulsion and pneumatic assisted conveying.

[0008] To solve the above-mentioned technical problems, according to one aspect of the present invention, the present invention provides the following technical solution:

[0009] A tailings dewatering device for metal mines, comprising:

[0010] The primary cyclone classification unit is used to receive flotation tailings and separate the overflow containing fine particles and the underflow containing coarse particles.

[0011] The dewatering and screening unit is connected to the underflow of the primary cyclone classification unit and is used to separate the underflow into coarse sand on the screen and material under the screen. It adopts a composite vibrating screen structure, which consists of an upper screen, a lower screen and a double eccentric block vibrating motor. The upper screen has a mesh size of 200 mesh and an inclination angle of 15 to 20 degrees. The lower screen has a mesh size of 325 mesh and an inclination angle of 25 to 30 degrees. The phase difference between the two eccentric blocks of the double eccentric block vibrating motor is adjustable from 0 to 90 degrees.

[0012] The secondary cyclone classifier is connected to the undersize outlet of the dewatering screening unit and is used to reclassify the undersize. The feed inlet of the secondary cyclone classifier is equipped with an adjustable Venturi feeder with a contraction section angle of 12 to 18 degrees and a diffusion section angle of 6 to 10 degrees.

[0013] A closed-loop circulation pipeline returns the sediment from the secondary cyclone grading unit to the feed end of the dewatering screening unit;

[0014] The coarse sand collection bin receives the coarse sand from the dewatering screening unit and the sediment from the secondary cyclone grading unit.

[0015] As a preferred embodiment of the metal mine tailings dewatering device described in this utility model, the closed-loop circulation pipeline is provided with an anti-clogging unit, which consists of a screw propeller, a compressed air nozzle and a wear-resistant lining. The screw propeller is axially installed in the middle of the pipeline, the compressed air nozzle is circumferentially distributed on the inner wall of the pipeline, and the wear-resistant lining is composed of tungsten carbide particles embedded in a polyurethane matrix.

[0016] As a preferred embodiment of the metal mine tailings dewatering device described in this utility model, the cone angle ratio between the primary cyclone classifier and the secondary cyclone classifier is 1.2-1.5:1, and the diameter of the secondary cyclone is 30%-40% smaller than that of the primary cyclone.

[0017] As a preferred embodiment of the metal mine tailings dewatering device described in this utility model, the coarse sand collection bin is equipped with a humidity detection module and a microwave dryer, and the microwave frequency is adjustable within a range of 2.45GHz±10%.

[0018] As a preferred embodiment of the metal mine tailings dewatering device described in this utility model, the anti-clogging unit has an elastic scraper on the edge of the spiral propeller blade, and the gap between the scraper and the inner wall of the pipe is 0.5-2mm.

[0019] As a preferred embodiment of the metal mine tailings dewatering device described in this utility model, the return ratio of the closed-loop circulation pipeline is controlled within the range of 20%-35% by an electric regulating valve, and a heating and insulation layer is laid on the outer wall of the pipeline.

[0020] Compared with the prior art, the beneficial effects of this utility model are as follows:

[0021] 1. The closed-loop system of dual hydrocyclone-dewatering screen significantly improves the recovery rate of +200 mesh coarse sand by reclassifying the undersize material through a two-stage hydrocyclone.

[0022] 2. The anti-clogging closed-loop circulation pipeline design, which combines mechanical propulsion and pneumatic assisted conveying, solves the problem of easy clogging in the circulation of high-concentration tailings;

[0023] 3. Differentiated hydrocyclone parameter configuration is adopted, the diameter of the secondary hydrocyclone is reduced by 30%-40% and combined with venturi feeding to enhance the classification effect of undersize material; Attached Figure Description

[0024] To more clearly illustrate the technical solutions of the embodiments of this utility model, the present utility model will be described in detail below with reference to the accompanying drawings and detailed embodiments. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort. Among them:

[0025] Figure 1 This is a schematic diagram of the overall structure of this utility model;

[0026] In the diagram: 1. Primary cyclone classification unit, 2. Dewatering and screening unit, 3. Secondary cyclone classification unit, 4. Closed-loop circulation pipeline, 5. Coarse sand collection bin, 6. Anti-clogging unit, 7. Humidity detection module, 8. Microwave dryer, 9. Electric regulating valve. Detailed Implementation

[0027] To make the above-mentioned objectives, features and advantages of this utility model more apparent and understandable, the specific embodiments of this utility model will be described in detail below with reference to the accompanying drawings.

[0028] Many specific details are set forth in the following description in order to provide a full understanding of the present invention. However, the present invention may also be implemented in other ways different from those described herein. Those skilled in the art can make similar extensions without departing from the spirit of the present invention. Therefore, the present invention is not limited to the specific embodiments disclosed below.

[0029] Secondly, this utility model is described in detail with reference to the schematic diagrams. When describing the embodiments of this utility model, for ease of explanation, the cross-sectional views showing the device structure may be partially enlarged, not according to the usual scale. Furthermore, the schematic diagrams are merely examples and should not limit the scope of protection of this utility model. In addition, in actual manufacturing, the three-dimensional spatial dimensions of length, width, and depth should be included.

[0030] To make the objectives, technical solutions, and advantages of this utility model clearer, the embodiments of this utility model will be described in further detail below with reference to the accompanying drawings.

[0031] This utility model provides a tailings dewatering device for metal mines. Please refer to [link / reference]. Figure 1 Including the following:

[0032] The primary hydrocyclone classifier 1 is used to receive flotation tailings and separate the overflow containing fine particles and the underflow containing coarse particles. The cone angle ratio between the primary hydrocyclone classifier 1 and the secondary hydrocyclone classifier 3 is 1.2-1.5:1, and the diameter of the secondary hydrocyclone is 30%-40% smaller than that of the primary hydrocyclone.

[0033] The dewatering screening unit 2 is connected to the underflow of the primary cyclone classification unit 1 and is used to separate the underflow into coarse sand on the screen and material under the screen. It adopts a composite vibrating screen structure, which consists of an upper screen, a lower screen and a double eccentric block vibrating motor. The upper screen has a mesh size of 200 mesh and an inclination angle of 15 to 20 degrees. The lower screen has a mesh size of 325 mesh and an inclination angle of 25 to 30 degrees. The phase difference between the two eccentric blocks of the double eccentric block vibrating motor is adjustable from 0 to 90 degrees.

[0034] The secondary cyclone classifier 3 is connected to the undersize outlet of the dewatering screening unit 2 and is used to reclassify the undersize. The feed inlet of the secondary cyclone classifier 3 is equipped with an adjustable Venturi feeder with a contraction section angle of 12 to 18 degrees and a diffusion section angle of 6 to 10 degrees.

[0035] The closed-loop circulation pipeline 4 returns the sediment from the secondary cyclone classification unit 3 to the feed end of the dewatering screening unit 2. The return ratio of the closed-loop circulation pipeline 4 is controlled within the range of 20%-35% by the electric regulating valve 12, and a heating and insulation layer is laid on the outer wall of the pipeline.

[0036] The closed-loop circulation pipeline 4 is equipped with an anti-clogging unit 7, which consists of a screw propeller, compressed air nozzles and a wear-resistant lining. The screw propeller is axially installed in the middle of the pipeline, the compressed air nozzles are evenly distributed around the inner wall of the pipeline, and the wear-resistant lining is made of tungsten carbide particles embedded in a polyurethane matrix. The edge of the screw propeller blade of the anti-clogging unit 7 is provided with an elastic scraper, and the gap between it and the inner wall of the pipeline is 0.5-2mm.

[0037] The coarse sand collection chamber 5 receives the coarse sand oversize from the dewatering screening unit 2 and the sediment from the secondary cyclone classification unit 3. The coarse sand collection chamber 5 is equipped with a humidity detection module 9 and a microwave dryer 10, with an adjustable microwave frequency range of 2.45GHz±10%.

[0038] Working principle: When this utility model is in use, the tailings enter the primary cyclone classification unit 1 and then undergo dewatering and screening in the dewatering and screening unit 2. The material on the screen enters the coarse sand collection bin 5, and the material under the screen enters the secondary cyclone classification unit 3 for secondary dewatering and screening. The sediment returns to the dewatering and screening unit 2, and the overflow (fine slurry) enters the pump room and is transported to the filling station.

[0039] Although the present invention has been described above with reference to embodiments, various modifications can be made and components can be replaced with equivalents without departing from the scope of the present invention. In particular, as long as there is no structural conflict, the features in the embodiments disclosed in this invention can be combined with each other in any way. The lack of an exhaustive description of these combinations in this specification is merely for the sake of brevity and resource conservation. Therefore, the present invention is not limited to the specific embodiments disclosed herein, but includes all technical solutions falling within the scope of the claims.

Claims

1. A tailings dewatering device for metal mines, characterized in that, include: The primary cyclone classification unit (1) is used to receive flotation tailings and separate the overflow containing fine particles and the underflow containing coarse particles. The dewatering screening unit (2) is connected to the underflow of the first-stage cyclone classification unit (1) and is used to separate the underflow into coarse sand on the screen and material under the screen. It adopts a composite vibrating screen structure, which consists of an upper screen, a lower screen and a double eccentric block vibrating motor. The upper screen has a mesh size of 200 mesh and an inclination angle of 15 to 20 degrees. The lower screen has a mesh size of 325 mesh and an inclination angle of 25 to 30 degrees. The phase difference between the two eccentric blocks of the double eccentric block vibrating motor can be adjusted from 0 to 90 degrees. The secondary cyclone classification unit (3) is connected to the undersize outlet of the dewatering screening unit (2) and is used to reclassify the undersize. The feed inlet of the secondary cyclone classification unit (3) is equipped with an adjustable Venturi feeder with a contraction section angle of 12 to 18 degrees and a diffusion section angle of 6 to 10 degrees. The closed-loop circulation pipeline (4) returns the sediment from the secondary cyclone classification unit (3) to the feed end of the dewatering screening unit (2); The coarse sand collection bin (5) receives the coarse sand from the dewatering screening unit (2) and the sediment from the secondary cyclone classification unit (3), respectively.

2. The metal mine tailings dewatering device according to claim 1, characterized in that, The closed-loop circulation pipeline (4) is equipped with an anti-clogging unit (6), which consists of a screw propeller, a compressed air nozzle and a wear-resistant lining. The screw propeller is axially installed in the middle of the pipeline, the compressed air nozzle is evenly distributed on the inner wall of the pipeline, and the wear-resistant lining is composed of tungsten carbide particles embedded in a polyurethane matrix.

3. The metal mine tailings dewatering device according to claim 1, characterized in that, The cone angle ratio between the primary cyclone classification unit (1) and the secondary cyclone classification unit (3) is 1.2-1.5:1, and the diameter of the secondary cyclone is 30%-40% smaller than that of the primary cyclone.

4. The metal mine tailings dewatering device according to claim 1, characterized in that, The coarse sand collection chamber (5) is equipped with a humidity detection module (7) and a microwave dryer (8), with the microwave frequency adjustable in the range of 2.45GHz±10%.

5. A metal mine tailings dewatering device according to claim 2, characterized in that, The anti-clogging unit (6) has an elastic scraper on the edge of the propeller blade, and the gap between the scraper and the inner wall of the pipe is 0.5-2mm.

6. A metal mine tailings dewatering device according to claim 1, characterized in that, The return ratio of the closed-loop circulation pipeline (4) is controlled within the range of 20%-35% by an electric regulating valve (9), and a heating and insulation layer is laid on the outer wall of the pipeline.

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