Overflow water system based on center transmission type thickener
By designing an overflow water system based on a central transmission bushing machine, the oblique arrangement of the annular tube and defoaming branch pipe and the design of the nozzles, the problem of untimely dissipation of foam near the inner wall of the bushing machine is solved, and effective foam dissipation and efficient recovery of useful minerals are achieved.
Patent Information
- Application Number
- CN202420906031.2
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-04-28
- Publication Date
- 2025-03-28
- Estimated Expiration
- 2034-04-28
AI Technical Summary
When existing equipment defoams, some of the foam close to the inner wall of the dense machine cannot dissipate in time, resulting in the overflow of undissipated foam, causing the loss of useful minerals and the effect of concentration.
An overflow water system based on a central transmission bushing machine is designed, including an overflow liquid collecting tank, an antifoam pump, a main pipe, annular pipe, annular branch pipe and a nozzle. Through the oblique arrangement of the annular pipe and annular branch pipe and the design of the nozzle, the foam on the surface of the ore slurry is effectively dissipated.
It effectively dissipates the foam near the inner wall of the dense machine, reduces the probability of foam entering overflow, improves the recovery rate and concentration efficiency of useful minerals, avoids overflow and runs out of chaos, and improves the clarity of overflow water.
Smart Images
Figure CN222677284U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the technical field of mineral processing, in particular to an overflow water system based on a central transmission type thickener. Background Art
[0002] Thickener is a gravity thickening equipment. It is used in mineral processing, mine filling, hydrometallurgy, chemical industry, environmental protection and other fields, and is most widely used in the field of mineral processing technology. In non-ferrous metal concentrators, it is mainly used for the concentration and dehydration of flotation concentrates and tailings. It can handle slurries with a solid weight concentration of 20-30%. Its underflow weight concentration can reach 40-60%, and the solid content in the overflow is generally below 0.1-0.5g / L, which is basically close to clarification. According to the different transmission methods, thickeners can be divided into two types: central transmission type and peripheral transmission type. The diameter of the central transmission thickener is relatively small, generally within 50m; the diameter of the peripheral transmission thickener is usually above 53m, and the largest in China can reach 100m.
[0003] In flotation operations, specific flotation agents are often added to adjust the hydrophilicity and hydrophobicity of the mineral surface to improve the sorting effect. Under the action of aeration and stirring, the agent and the slurry are fully blended, and useful minerals attach to the bubbles and float to the surface of the slurry to form a mineralized foam layer, which is scraped out by the scraper or overflows into the concentrate pump pool in a self-overflowing manner; the gangue minerals remain in the slurry and are discharged to the tailings pump pool as tailings. In order to maximize the flotation efficiency and obtain better flotation indicators, the ore dressing plant often increases the amount of agents within a certain limit, which will cause a thicker foam layer to accumulate on the surface of the slurry of the flotation machine.
[0004] The flotation concentrate is sent to the thickener for concentration. During the concentration process, since it takes a certain amount of time for the mineral particles to settle, a foam layer of a certain thickness will be formed on the surface of the thickener tank. Under the action of gravity sedimentation, the overflow will flow out from the overflow weir at the top of the tank, and the bottom flow will be scraped to the discharge funnel at the bottom center for discharge. In this process, the foam that has not been completely settled or cannot be dissipated will be mixed with the overflow water and overflow.
[0005] When the existing equipment uses nozzles to spray water to break the foam on the surface of the slurry, the layout of the nozzles is not conducive to the dissipation of the foam near the inner wall of the thickener pool. Some of the undissipated foam still has the problem of overflow, which will cause the useful mineral particles attached to the surface of the foam to enter the overflow, causing the loss of useful minerals, which is not conducive to the sedimentation of mineral particles. The solid content of the overflow water will also increase, and even turbidity will occur, affecting the concentration effect. Utility Model Content
[0006] The utility model aims to provide an overflow water system based on a central transmission thickener, which is used to solve the problem that when the existing equipment defoams in the thickener, some foams near the inner wall of the thickener cannot be dissipated in time, and the undissipated foam overflows.
[0007] To achieve the above-mentioned purpose, the utility model provides the following technical solutions: an overflow water system based on a central transmission thickener, comprising a thickener tank, an overflow assembly arranged on the thickener tank, and a defoaming mechanism arranged on the thickener tank, the defoaming mechanism comprising an overflow collecting tank arranged on one side of the thickener tank, a defoaming pump arranged in the overflow collecting tank, a main pipe connected to the outlet of the defoaming pump, an annular pipe connected to one end of the main pipe, a plurality of defoaming branches arranged on the annular pipe, and a nozzle connected to the defoaming branch pipe, wherein the annular pipe is located above the port of the thickener tank; a plurality of defoaming branches are arranged at equal intervals along the annular pipe, and the defoaming branches are arranged obliquely relative to the annular pipe; a valve is provided on the pipe section of the defoaming branch pipe.
[0008] Furthermore, the overflow assembly includes an annular plate arranged in the thickener tank, an annular short section cylinder arranged on the annular plate, a heightened cylinder arranged on the annular short section cylinder, and a plurality of equally spaced drainage grooves arranged on the heightened cylinder; the drainage grooves are equally spaced in the circumferential direction of the heightened cylinder; an overflow groove is formed between the thickener tank, the annular plate, and the annular short section cylinder, and a plurality of connecting pipes are provided on the outer wall of the overflow groove, one end of one of the connecting pipes is connected to an overflow pipe, and one end of the overflow pipe extends into the overflow collecting tank.
[0009] Furthermore, the drainage trough includes a bottom plate arranged on the outer wall of the heightened cylinder, a drainage pipe arranged on the lower side of the bottom plate and extending into the overflow trough, two side plates arranged on the upper side of the bottom plate, a vertical plate connected to the two side plates, a side baffle plate connected to the two side plates at the same time, and a front baffle plate connected between the two side baffle plates; an overflow port is formed between the two side baffle plates, the front baffle plate, and the heightened cylinder; the upper sides of the front baffle plates, the side baffle plates, and the side plates are all 200mm higher than the bottom plate, the upper edge of the vertical plate is 120mm away from the bottom plate, and the lower edges of the front baffle plates and the side baffle plates are 300mm away from the bottom plate; the angle formed between the side baffle plate and the front baffle plate is 150°, and the angle formed between the side baffle plate and the side plate is 120°; the angle formed between the upper side of the side plate and the upper side of the vertical plate is a 45° chamfer.
[0010] Furthermore, a plurality of reinforcing ribs are provided at the connection between the heightening cylinder and the annular short section cylinder; the plurality of reinforcing ribs are arranged at equal intervals along the inner wall of the annular short section cylinder.
[0011] Furthermore, a process return water tank is provided on one side of the thickener tank, and a connecting pipe is connected between the process return water tank and another connecting pipe.
[0012] Furthermore, a plurality of annular brackets arranged at equal intervals are provided between the annular tube and the heightening tube.
[0013] Furthermore, a platform is provided at the lower side of the overflow sump.
[0014] Compared with the prior art, the beneficial effects of the utility model are as follows:
[0015] The overflow water with foam on the surface flows from the center of the thickener tank to the heightening cylinder. When entering the drainage trough, the foam is blocked by the front and side foam baffles in the thickener tank, and the overflow water flows into the drainage trough through the overflow port; the overflow water entering the drainage trough flows into the overflow trough through the drainage pipe fixed at the bottom of the bottom plate, and then flows into the overflow collecting tank by gravity through the connecting pipe and the overflow pipe; the overflow water fed into the overflow collecting tank is sent to the annular pipe through the main pipe under the pressure of the defoaming pump; the overflow water in the annular pipe is sprayed on the surface of the slurry in the thickener tank through the defoaming branch pipe, valve, and nozzle to break the foam on the surface of the slurry; the defoaming branch pipe is arranged obliquely relative to the annular pipe, opposite to the running direction of the thickener, which can produce reverse impact on the foam, which is conducive to the dissipation of the foam and improves the efficiency of the concentration operation;
[0016] Setting a drainage trough directly above the overflow trough can effectively block the foam with mineral particles adhered to the surface in the pool body, providing convenient time and space conditions for the further sedimentation of the mineral particles, and further improving the recovery rate of useful minerals; at the same time, it can effectively reduce the probability of foam mixing into the overflow water and overflowing, avoid overflow turbidity, and improve the clarity of the overflow water. BRIEF DESCRIPTION OF THE DRAWINGS
[0017] Figure 1 It is a top view schematic diagram of the overflow water system of the utility model;
[0018] Figure 2 It is a cross-sectional schematic diagram of the overflow water system of the utility model;
[0019] Figure 3 It is a partial schematic diagram of the annular short section of the utility model;
[0020] Figure 4 It is a partial schematic diagram of the overflow tank of the utility model from top view;
[0021] Figure 5 It is a partial schematic diagram of the overflow tank of the utility model;
[0022] Figure 6 It is a partial schematic diagram of the annular pipe of the utility model.
[0023] In the figure: 1. thickener tank; 2. annular short section; 3. overflow trough; 4. connecting pipe; 5. overflow pipe; 6. overflow collecting tank; 7. defoaming pump; 8. main pipe; 9. annular pipe; 10. nozzle; 11. heightening cylinder; 12. reinforcing ribs; 13. defoaming branch pipe; 14. drainage trough; 15. bottom plate; 16. vertical plate; 17. side plate; 18. drainage pipe; 19. positive bubble baffle; 20. side bubble baffle; 21. overflow port; 22. valve; 23. bracket; 24. platform; 25. connecting pipe; 26. process return water tank; 27. annular plate. DETAILED DESCRIPTION
[0024] See also Figure 1-6 An overflow water system based on a central transmission thickener comprises a thickener tank 1, an overflow assembly arranged on the thickener tank 1, and a defoaming mechanism arranged on the thickener tank 1. The defoaming mechanism comprises an overflow collecting tank 6 arranged on one side of the thickener tank 1, a defoaming pump 7 arranged in the overflow collecting tank 6, a main pipe 8 connected to the outlet of the defoaming pump 7, an annular pipe 9 connected to one end of the main pipe 8, a plurality of defoaming branches 13 arranged on the annular pipe 9, and a nozzle 10 connected to the defoaming branch pipe 13. The annular pipe 9 is located above the port of the thickener tank 1; the plurality of defoaming branches 13 are arranged along the annular pipe 9. The defoaming branches 13 are arranged at equal intervals in the annular tube 9, and the defoaming branches 13 are arranged at 45° relative to the annular tube 9, and the defoaming branches 13 are installed on the annular tube 9 at intervals of 10 to 15°; a valve 22 is provided on the pipe section of the defoaming branch 13; according to the different diameters of the thickener, 1 to 3 overflow collecting tanks 6 can be set, and the overflow collecting tanks 6 are steel tanks; the defoaming pump 7 is a submersible pump, and the flow rate and head should meet the defoaming requirements; the nozzle 10 is a special high-pressure nozzle with a unique cavity structure; the use of the nozzle 10 for defoaming can effectively control the size of the water mist particles and improve the defoaming efficiency.
[0025] The overflow assembly includes an annular plate 27 arranged in the thickener tank 1, an annular short section cylinder 2 arranged on the inner edge of the annular plate 27, a heightened cylinder 11 arranged on the annular short section cylinder 2, and a plurality of drainage grooves 14 arranged on the heightened cylinder 11; the drainage grooves 14 are evenly distributed on the circumference of the heightened cylinder 11 at intervals of 20 to 30 degrees; an overflow groove 3 is formed between the inner circumferential wall of the thickener tank 1, the annular plate 27, and the annular short section cylinder 2, and a plurality of connecting pipes 4 are arranged on the outer wall of the overflow groove 3, one end of the connecting pipe 4 is connected to an overflow pipe 5, and one end of the overflow pipe 5 extends into the overflow collecting tank 6; the overflow pipe 5, the main pipe 8, the annular pipe 9, and the defoaming branch pipe 13 are all seamless steel pipes.
[0026] The drainage trough 14 includes a bottom plate 15 arranged on the outer wall of the heightened cylinder 11, a drainage pipe 18 arranged on the lower side of the bottom plate 15 and extending into the overflow trough 3, two side plates 17 arranged on the upper side of the bottom plate 15, a vertical plate 16 connected between the two side plates 17, a side baffle plate 20 connected to the two side plates 17, and a front baffle plate 19 connected between the two side baffle plates 20; an overflow port 21 is formed between the two side baffle plates 20, the front baffle plate 19, and the heightened cylinder 11, and the widest part of the cross section of the overflow port 21 is 100 mm , overflow water can enter the drain trough 14 from the overflow port 21; the upper sides of the positive baffle plate 19, the side baffle plate 20, and the side plate 17 are all 200mm higher than the bottom plate 15, the upper side of the vertical plate 16 is 120mm higher than the bottom plate 15, and the lower edges of the positive baffle plate 19 and the side baffle plate 20 are 300mm away from the bottom plate 15; the angle formed between the side baffle plate 20 and the positive baffle plate 19 is 150°, and the angle formed between the side baffle plate 20 and the side plate 17 is 120°; the upper side of the side plate 17 and the vertical plate 1 6 has a 45° chamfer on the upper side; the positive baffle plate 19, the side baffle plate 20, the side plate 17, the vertical plate 16, and the bottom plate 15 are strip-shaped hot-rolled steel plates, the thickness of which is consistent with the thickness of the heightening cylinder 11, and are welded and fixed to each other; the side plate 17 and the vertical plate 16 are arranged at 90°; the drainage pipe 18 is a seamless steel pipe with a diameter of DN150mm, installed vertically, one end of which is welded to the bottom of the bottom plate 15, and the other end is not more than 200mm from the bottom of the overflow trough 3; the drainage trough 14 is installed directly above the overflow trough 3, and its upper edge is aligned with the upper edge of the heightening cylinder 11 When the drainage trough 14 is installed, a concave opening needs to be cut on the heightening tube 11, and the two are welded and fixed to each other; the drainage trough 14 is evenly distributed on the circumference of the heightening tube 11 at intervals of 20 to 30 degrees; the outlet end of the drainage pipe 18 of the overflow weir drainage trough 14 is no more than 200 mm from the bottom of the overflow trough 3, and the drainage pipe 18 can divert the overflow water to the bottom of the overflow trough 3, and then flow out through the connecting pipe 4 arranged on the upper part of the side wall of the overflow trough 3, extending the overflow water flow path and promoting further improvement of the overflow water quality.
[0027] The heightening cylinder 11 is composed of a plurality of rectangular heightening plates, which are rectangular hot-rolled steel plates, bent and welded on site, and have the same thickness as the annular short section cylinder 2, and are fixed to the annular short section cylinder 2 by welding; the heightening cylinder 11 is arranged on the thickener annular short section cylinder 2, which can increase the height of the slurry level in the thickener pool, increase the residence time of the slurry in the thickener pool, and create favorable conditions for the full sedimentation of mineral particles; according to the communicating vessel principle, the slurry level in the thickener pool 1 should be on the same horizontal plane as the bottom plate 15 of the drainage trough 14, that is, the slurry level in the thickener pool 1 should be 200mm lower than the upper edge of the heightening cylinder 11; after the heightening cylinder 11 and the drainage trough 14 are installed, the slurry level of the thickener can be raised by 600-800mm; after the heightening cylinder 11 is installed, the overall height of the overflow weir is increased by 800-1000mm on the basis of the original overflow weir, and it is required to be not less than 500mm higher than the thickener pool 1.
[0028] A plurality of reinforcing ribs 12 are provided at the connection between the heightening cylinder 11 and the annular short section cylinder 2; the plurality of reinforcing ribs 12 are arranged at equal intervals along the inner wall of the annular short section cylinder 2; the reinforcing ribs 12 are used to ensure the stability of the overflow weir after heightening.
[0029] A process return water tank 26 is provided on one side of the thickener tank 1, and a connecting pipe 25 is connected between the process return water tank 26 and another connecting pipe 4; the connecting pipe 4 is provided on the upper part of the side wall of the overflow tank 3, and the number of connecting pipes 4 is determined according to actual needs; a small part of the overflow water flows by gravity into the overflow collecting tank 6 for defoaming, and the remaining overflow water flows into the process return water tank 26 and returns to the mineral processing plant production system for reuse, thereby further improving the utilization rate of the process return water.
[0030] A plurality of annular brackets 23 arranged at equal intervals are provided between the annular tube 9 and the heightening tube 11 .
[0031] The overflow liquid collecting tank 6 is installed on the platform 24 directly below the connecting pipe 4; the conveying and lifting height of the defoaming pump 7 can be reduced, saving power consumption.
[0032] Working principle: overflow water with foam on the surface flows from the center of the thickener tank 1 to the heightening cylinder 11. When entering the drainage trough 14, the foam is blocked in the thickener tank 1 by the front foam baffle plate 19 and the side foam baffle plate 20, and the overflow water flows into the drainage trough 14 through the overflow port 21; the overflow water entering the drainage trough 14 flows into the overflow trough 3 through the drainage pipe 18 fixed at the bottom of the bottom plate 15, and then flows into the overflow collecting tank 6 by gravity through the connecting pipe 4 and the overflow pipe 5; the overflow water fed into the overflow collecting tank 6 is sent to the annular pipe 9 through the main pipe 8 under the pressure of the defoaming pump 7; the overflow water in the annular pipe 9 is sprayed on the surface of the thickener slurry through the defoaming branch pipe 13, the valve 22, and the nozzle 10 to break the foam on the surface of the slurry; the defoaming branch pipe 13 and the annular pipe 9 are arranged at 45 degrees, which is opposite to the running direction of the thickener, and can produce reverse impact on the foam, which is conducive to the dissipation of the foam and improves the efficiency of the concentration operation;
[0033] A drainage trough 14 is arranged just above the overflow trough 3, which can effectively block the foam with mineral particles adhered to the surface in the pool body, providing convenient time and space conditions for the further sedimentation of the mineral particles, and further improving the recovery rate of useful minerals; at the same time, it can effectively reduce the probability of foam mixing into the overflow water and overflowing, avoid the overflow turbidity phenomenon, and improve the clarity of the overflow water.
[0034] The above are only preferred embodiments of the present invention and are not intended to limit the present invention. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present invention should be included in the protection scope of the present invention.
Claims
1. An overflow water system based on a central transmission thickener, comprising a thickener tank (1), an overflow assembly arranged on the thickener tank (1), and a defoaming mechanism arranged on the thickener tank (1), characterized in that: The defoaming mechanism comprises an overflow collecting tank (6) arranged at one side of the thickener tank (1), a defoaming pump (7) arranged in the overflow collecting tank (6), a main pipe (8) connected to the outlet of the defoaming pump (7), an annular pipe (9) connected to one end of the main pipe (8), a plurality of defoaming branch pipes (13) arranged on the annular pipe (9), and a nozzle (10) connected to the defoaming branch pipe (13), wherein the annular pipe (9) is located above the port of the thickener tank (1); the plurality of defoaming branch pipes (13) are arranged at equal intervals inside the annular pipe (9), and the defoaming branch pipes (13) are arranged obliquely relative to the annular pipe (9); a valve (22) is provided on the pipe section of the defoaming branch pipe (13); the overflow assembly comprises A ring plate (27) provided in a thickener tank (1), an annular short section cylinder (2) provided on the inner edge of the ring plate (27), a heightened cylinder (11) provided on the annular short section cylinder (2), and a plurality of drainage grooves (14) provided on the heightened cylinder (11); the drainage grooves (14) are arranged at equal intervals in the circumferential direction of the heightened cylinder (11); an overflow groove (3) is formed between the inner circumferential wall of the thickener tank (1), the ring plate (27), and the annular short section cylinder (2); a plurality of connecting pipes (4) are provided on the outer wall of the overflow groove (3), one end of one of the connecting pipes (4) is connected to an overflow pipe (5), one end of the overflow pipe (5) extends into an overflow collecting tank (6); the drainage groove (1 4) comprising a bottom plate (15) arranged on the outer wall of the heightening cylinder (11), a drainage pipe (18) arranged on the lower side of the bottom plate (15) and extending into the overflow groove (3), two side plates (17) arranged on the upper side of the bottom plate (15), a vertical plate (16) connected between the two side plates (17), a side baffle plate (20) connected to the two side plates (17), and a front baffle plate (19) connected between the two side baffle plates (20); an overflow port (21) is formed between the two side baffle plates (20), the front baffle plate (19), and the heightening cylinder (11); the upper sides of the front baffle plate (19), the side baffle plate (20), and the side plate (17) are all 200 mm higher than the bottom plate (15). The upper side of the vertical plate (16) is 120 mm higher than the bottom plate (15); the distance between the lower edges of the front baffle plate (19) and the side baffle plate (20) and the bottom plate (15) is 300 mm; the angle formed between the side baffle plate (20) and the front baffle plate (19) is 150°, and the angle formed between the side baffle plate (20) and the side plate (17) is 120°; the angle formed between the upper side of the side plate (17) and the upper side of the vertical plate (16) is chamfered at 45°; a plurality of reinforcing ribs (12) are provided at the connection between the heightening cylinder (11) and the annular short section cylinder (2); the plurality of reinforcing ribs (12) are arranged at equal intervals along the inner wall of the annular short section cylinder (2).
2. An overflow water system based on a central drive thickener as claimed in claim 1, characterized in that: A process water return tank (26) is provided on one side of the thickener tank (1), and a connecting pipe (25) is connected between the process water return tank (26) and another connecting pipe (4).
3. An overflow water system based on a central drive thickener as claimed in claim 1, characterized in that: A plurality of annular brackets (23) arranged at equal intervals are provided between the annular tube (9) and the heightening tube (11).
4. An overflow water system based on a central drive thickener as claimed in claim 1, characterized in that: A platform (24) is provided on the lower side of the overflow liquid collecting tank (6).