Thickener convenient for centralizing slurry

Abstract

A rake frame is rotationally connected with a stand column of a thickening tank and is in transmission connection with a rake driving power mechanism, the two ends of a spiral roller are rotationally connected with two vertical extending arms of the rake frame respectively, and the rake frame is suitable for driving the spiral roller to roll away at the bottom of the thickening tank and / or slurry so as to scrape the slurry at the bottom of the thickening tank to the middle of the bottom of the thickening tank. Compared with a mud shifting sheet mode, the mud shifting structure in a spiral roller mode is lower in mud stacking and squeezing effect, the mud shifting structure in a rolling mode is centered to the middle of the bottom of a pool, the mud centering rate of the spiral roller is higher than that of the mud shifting sheet mode, the load borne by a rake frame is relatively lower, and a rake driving power mechanism saves more power; the slime flows to the middle of the bottom of the pond in a rolling manner, and residual bubbles in the slime are further removed.

Description

Technical Field

[0001] This invention relates to mineral thickening, and more particularly to a thickener for facilitating the centralization of mineral slime. Background Technology

[0002] A thickener is a mineral liquid separation device suitable for sedimentation, thickening, and bubble removal in flotation. After a certain proportion of the slurry is dewatered, the flotation ore becomes sludge. The thickener includes a thickening tank and a rake frame. The lower end of the rake frame is used to push the sludge at the bottom of the thickening tank to the middle of the tank bottom, and the sludge is discharged from the outlet in the middle of the tank bottom.

[0003] In existing thickeners, the lower end of the rake frame uses a mud-pushing blade. This blade pushes and squeezes large pieces of slurry, driving the slurry at the bottom of the pool to move towards the center of the pool through a stacking and squeezing motion. This results in a heavy load on the rake frame and requires a high-power rake motor, meaning the effective power utilized by the mud-pushing blade in centering the slurry is relatively low. A better approach would be to make the bottom of the thickener pool conical, but this reduces the usable space occupied by the thickener.

[0004] In addition, the rake frame uses a pushing method to drive the mud at the bottom of the pool to the center, resulting in less mud tumbling and the amount of mud bubble elimination is still not ideal. Summary of the Invention

[0005] This invention aims to solve at least one of the aforementioned technical problems by providing a sludge thickener that facilitates centralization of sludge. A horizontal spiral roller rolls circumferentially to scrape sludge from the bottom of the tank. Each spiral stroke scrapes a corresponding small portion of sludge, while the spiral blade scrapes radially. Its useful power is higher than that of a mud-scraping blade. The sludge moves centrally in a tumbling manner, and residual air bubbles in the sludge are further effectively eliminated.

[0006] To achieve the above objectives, the technical solution adopted by the present invention is as follows:

[0007] A thickener for facilitating the centralization of mineral slime includes a thickening tank, a rake frame, and a spiral roller. The thickening tank is provided with an overflow trough and a column extending upward from the bottom of the thickening tank. The overflow trough extends along the inner periphery of the thickening tank and is adapted to discharge mineral water overflowing from the thickening tank. The rake frame is rotatably connected to the column and is driven by a rake-driving power mechanism. The two ends of the spiral roller are respectively rotatably connected to two vertical arms of the rake frame. The spiral roller extends along the bottom of the thickening tank from the middle of the bottom to the inner wall of the thickening tank. The rake frame is adapted to drive the spiral roller to roll along the bottom of the thickening tank and / or the mineral slime, so as to scrape the mineral slime at the bottom of the tank towards the center of the bottom.

[0008] Compared with the prior art, the beneficial effects of this application include: the spiral rolling ore-pulling structure has a lower ore-sludge stacking and displacement effect compared with the sludge-pulling sheet method, and instead presents a tumbling manner towards the center of the pool bottom. The ore-sludge centering rate of the spiral rolling is higher than that of the sludge-pulling sheet method, the load on the rake frame is relatively lower, and the rake power mechanism is more energy-efficient; the ore-sludge is tumbling towards the center of the pool bottom, and residual air bubbles in the ore-sludge are further eliminated; in addition, the bottom of the thickening pool can be made into a flat bottom or a relatively gentle cone to improve the space utilization of the thickener.

[0009] As an improvement to the above technical solution, the column is provided with a slurry inlet channel, the slurry inlet of the slurry inlet channel is located at the top of the column and is adapted to connect to the slurry inlet pipe, and the slurry outlet of the slurry inlet channel is adapted to supply slurry to the thickening tank in a manner lower than the liquid level.

[0010] As an improvement to the above technical solution, one end of the rake frame is rotatably connected to the column, and the other end is provided with a roller. The rake frame is provided with a rake motor or rake engine that is connected to the roller. The roller is adapted to travel along the upper edge of the thickening tank.

[0011] As an improvement to the above technical solution, the upper end of the rake frame is a frame, the frame supports a trestle panel, and the other end of the frame is suitable for workers to go up and down the trestle panel.

[0012] As an improvement to the above technical solution, the vertical extension arm is integrally formed with a fixed gripping piece, and the fixed gripping piece is screwed to a detachable gripping piece. The fixed gripping piece and the detachable gripping piece are adapted to jointly grip the end of the spiral roller.

[0013] As an improvement to the above technical solution, the end of the spiral roller is fitted with a rolling bearing, and sealing felt rings are provided on both sides of the rolling bearing. The fixed clamping piece and the detachable clamping piece simultaneously grip the rolling bearing and its corresponding sealing felt ring.

[0014] As an improvement to the above technical solution, a defoaming drain pipe is installed between the column and the edge of the thickening tank opening. The rake frame is equipped with a bubble-driving blade extending radially along the thickening tank. The bubble-driving blade is adapted to rotate with the rake frame, so that the bubbles on the surface of the thickening tank are pushed towards the bottom of the defoaming drain pipe.

[0015] As an improvement to the above technical solution, an arc-shaped bubble-blocking net is provided above the spiral roller. The two ends of the arc-shaped bubble-blocking net are respectively fixed to the corresponding vertical extension arm. The arc-shaped bubble-blocking net is suitable for cutting or crushing floating bubbles. The arc-shaped bubble-blocking net is suitable for cutting floating bubbles during swinging to release the mineral material inside the bubbles. The arc-shaped bubble-blocking net is suitable for providing an upward force to the rake frame and the spiral roller through the bubbles.

[0016] As an improvement to the above technical solution, the rake frame is provided with multiple arc-shaped bubble-blocking nets arranged in the vertical direction.

[0017] As an improvement to the above technical solution, the plurality of arc-shaped bubble-blocking nets include a first bubble-blocking net and a second bubble-blocking net adjacent to the first bubble-blocking net. The first bubble-blocking net and the second bubble-blocking net form a wing. The wing obtains an upward force based on the fluid velocity difference between the upper and lower surfaces. The first bubble-blocking net and the second bubble-blocking net cut the bubbles at different flow velocities. The tail of the wing is suitable for the co-bursting of fluid bubbles. Attached Figure Description

[0018] The specific embodiments of the present invention will be further described in detail below with reference to the accompanying drawings, wherein:

[0019] Figure 1 This is a schematic diagram of the structure of a slime thickener according to an embodiment of the present invention;

[0020] Figure 2 for Figure 1 A partial structural diagram of a thickener for facilitating the centralization of mineral slime is shown;

[0021] Figure 3 for Figure 1 A schematic diagram of the rake frame structure for a thickener that facilitates the centering of ore slime is shown;

[0022] Figure 4 for Figure 1 A partial schematic diagram of the assembly of the first and second baffles of a mud thickener is shown;

[0023] Figure 5 for Figure 1 A schematic diagram of a spiral roller structure is shown, which facilitates the centralization of slurry thickeners.

[0024] The accompanying drawings are only one specific embodiment of the present invention, and the form and structure of this specific embodiment should not limit the extension of other embodiments.

[0025] Thickening tank 100, overflow trough 110, column 120, slurry inlet channel 121, ore collection settling trough 130;

[0026] Rake frame 200, vertical extension arm 210, fixed clamping plate 211, detachable clamping plate 212, bubble-driving plate 220, arc-shaped bubble-blocking net 230, first bubble-blocking net 231, second bubble-blocking net 232;

[0027] The harrow power mechanism is 300, the rollers are 310, and the harrow motor is 320;

[0028] 400 spiral roller, 410 rolling bearing, 420 sealing felt ring;

[0029] 500 defoaming downpipe. Detailed Implementation

[0030] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the scope of protection of the present invention.

[0031] Reference Figure 1 , Figure 2 This invention provides a thickener for easy centering of mineral slime, comprising a thickening tank 100, a rake frame 200, and a spiral roller 400. The thickening tank 100 is provided with an overflow trough 110 and a column 120 extending upward from the inner bottom of the thickening tank 100. The overflow trough 110 extends along the inner peripheral wall of the thickening tank 100 and is suitable for discharging mineral water overflowing from the thickening tank 100. The rake frame 200 is rotatably connected to the column 120 and is driven by a rake power mechanism 300. The two ends of the spiral roller 400 are rotatably connected to the two vertical extension arms 210 of the rake frame 200. The spiral roller 400 extends along the bottom of the thickening tank 100 from the middle of the bottom to the inner wall of the thickening tank 100. The rake frame 200 is suitable for driving the spiral roller 400 to roll along the bottom of the thickening tank 100 and / or the mineral slime, so as to scrape the mineral slime at the bottom of the tank towards the middle of the bottom of the tank.

[0032] Understandably, referring to Figure 1 , Figure 2 In the thickener, a sludge outlet (aaa) is located at the bottom. A rake frame (200) scrapes the sludge, ensuring a continuous flow of sludge to the outlet. In some configurations, the sludge outlet pipe is angled, allowing the sludge flowing to the outlet to be automatically discharged via the pipe due to its own weight and slurry hydraulic pressure. The concentrate sludge is typically transported to a filter press / ceramic filter. In the filter press / ceramic filter, the sludge (approximately 60% moisture content) is dewatered to a concentrate cake / concentrate soil with a moisture content of approximately 20%. In some configurations, the sludge outlet pipe is an auger type, containing spiral blades connected to a motor.

[0033] Preferably, the bottom of the thickening tank 100 is cone-shaped, as shown in the reference. Figure 1 , Figure 2 A sludge outlet is provided in the middle of the bottom of the thickening tank 100; combined with the scraping of the sludge by the rake frame 200, the sludge flows to the middle of the bottom of the thickening tank 100, and the direction of sludge flow is relatively consistent, which facilitates the full, effective and rapid discharge of the sludge.

[0034] Understandably, referring to Figure 1 , Figure 2The spiral roller 400 lies on the bottom of the thickening tank 100, or on the sludge. Dragged by the rake frame 200, the spiral roller 400 rolls along the bottom of the thickening tank 100, similar to the toothed rollers of a tumbling machine or the discs of a disc plow. The spiral roller 400 has spirally extending helical blades / threads, and during its rolling, it drives the sludge towards the center of the tank bottom.

[0035] In some designs, the feed pipe is suspended, allowing concentrate slurry (flotation ore) to fall directly into the thickening tank 100. When the rake frame 200 is near the slurry outlet of the feed pipe, it is easy for slurry to stick to it; or, when the rake frame 200 is near the slurry outlet of the feed pipe, the feed pipe needs to pause the slurry flow. Preferably, refer to Figure 1 , Figure 2 The column 120 is provided with a slurry inlet channel 121. The slurry inlet of the slurry inlet channel 121 is located at the top of the column 120 and is adapted to connect to the slurry inlet pipe. The slurry outlet of the slurry inlet channel 121 is adapted to supply slurry to the thickening tank 100 in a manner lower than the liquid level, that is, the slurry outlet of the slurry inlet channel 121 is at least lower than the upper port of the overflow trough 110.

[0036] The operation process of this invention is as follows: (Refer to...) Figure 1 , Figure 2 Driven by the power mechanism 300, the rake frame 200 rotates around the column 120 of the thickening tank 100, as... Figure 1 , Figure 2 The W direction is shown;

[0037] As the rake frame 200 rotates, the vertical extension arm 210 of the rake frame 200 drives the spiral roller 400 to roll. The spiral roller 400 rolls on the bottom of the thickening tank 100 and / or on the sludge, and rolls around the column 120 of the thickening tank 100.

[0038] As the spiral roller 400 rolls, it scrapes and pushes the sludge towards the center of the pool bottom.

[0039] The 400 spiral roller is suitable for rolling around a 120mm column, see reference. Figure 1 , Figure 2 , Figure 5 The spiral roller 400 is conical, with a smaller proximal end and a larger distal end. Therefore, when the spiral roller 400 rolls, combined with the flow effect of the overflow trough 110, a vortex (swirling water flow) is formed above it. In this vortex, the lower horizontal direction is radially inward, facilitating the flushing of sludge to the center of the pool bottom; the outer vertical direction is downward, facilitating the separation of ore from the upper layer of the thickening tank 100 and its settling, preventing excessive sludge escape into the overflow clear liquid.

[0040] Compared with the prior art, the beneficial effects of this application include: the ore-pulling structure using a spiral roller 400 has a lower ore-pulling effect than the mud-pulling method, and instead presents a tumbling manner towards the center of the pool bottom. The ore-pulling centralization rate of the spiral roller 400 is higher than that of the mud-pulling method, the load on the rake frame 200 is relatively lower, and the rake power mechanism 300 is more power-efficient; the ore-pulling manner towards the center of the pool bottom further eliminates residual air bubbles in the ore-pulling; in addition, the bottom of the thickening pool 100 can be made into a flat bottom or a relatively gentle cone to improve the space utilization of the thickener.

[0041] The upper part of the rake frame 200 is a frame that supports a trestle panel / work platform, making it easy for workers to walk.

[0042] Reference Figures 1 to 3 In some embodiments of the present invention, the vertical extension arm 210 is integrally formed with a fixed gripping piece 211, and the fixed gripping piece 211 is screwed to a detachable gripping piece 212. The fixed gripping piece 211 and the detachable gripping piece 212 are adapted to jointly grip the end of the spiral roller 400; the spiral roller 400 and its rolling bearing 410 can be easily disassembled and assembled.

[0043] Reference Figure 3 , Figure 5 In some embodiments of the present invention, the end of the spiral roller 400 is fitted with a rolling bearing 410, and the fixed clamping plate 211 and the detachable clamping plate 212 are adapted to grip the outer ring of the rolling bearing 410. The spiral roller 400 is connected to the vertical extension arm 210 through the rolling bearing 410, and the rolling of the spiral roller 400 is relatively flexible.

[0044] Reference Figure 3 , Figure 5 In some embodiments of the present invention, sealing felt rings 420 are provided on both sides of the rolling bearing 410. Fixed clamping plates 211 and detachable clamping plates 212 simultaneously grip the rolling bearing 410 and its corresponding sealing felt rings 420. After being gripped by the fixed clamping plates 211 and detachable clamping plates 212, the rolling bearing 410 is isolated and protected by the corresponding sealing felt rings 420, greatly reducing the impact of sludge on the rolling bearing 410. After the spiral roller 400 and its rolling bearing 410 are easily detached from the vertical extension arm 210, the sludge on them can be easily washed away, thereby allowing for the replacement or maintenance of the rolling bearing 410 and the sealing felt rings 420.

[0045] Reference Figure 1 , Figure 2In some embodiments of the present invention, one end of the rake frame 200 is rotatably connected to the column 120, and the other end is provided with a roller 310. The rake frame 200 is provided with a rake motor 320 or a rake engine that drives the roller 310. That is, the rake power mechanism 300 includes the roller 310 and the rake machine. The roller 310 is suitable for moving along the upper edge of the thickening tank 100. The rake machine driven by the roller 310 can be a gasoline engine, diesel engine, etc., reducing the complex structure of cable, air / hydraulic circuit laying. The rake machine driven by the roller 310 can be an electric motor. The column 120 is provided with a brush pair suitable for electrically connecting the rake motor 320. The rake frame 200 is provided with rotational power at the distal end. According to the lever principle, the energy consumed by the rake machine installed at the distal end is relatively small compared to other installation positions. The other end of the frame is located above the edge of the thickening tank 100, which facilitates workers to easily go up and down the platform panel.

[0046] In some embodiments of the present invention, the spiral roller 400 is also directly driven by the rake power mechanism 300. The roller 310 is connected to the rake motor 320 via a coupling, the coupling having an integrally formed drive wheel adapted to drive the spiral roller 400.

[0047] Reference Figure 1 , Figure 2 In some embodiments of the present invention, a defoaming downpipe 500 is installed between the column 120 and the edge of the thickening tank 100. The rake frame 200 is equipped with a bubble-driving blade 220 extending radially along the thickening tank 100. The bubble-driving blade 220 is adapted to rotate with the rake frame 200, causing bubbles on the surface of the thickening tank 100 to be pushed downwards towards the defoaming downpipe 500. The bubbles are broken and / or dissolved by dripping water, releasing the minerals they contain after bursting. In addition, the dripping method increases the original water content of the bubbles, diluting the minerals and allowing them to settle fully and quickly. The present invention provides a movable bubble-driving blade 220 and a fixed defoaming downpipe 500, avoiding the need for the defoaming downpipe 500 to move relative to the rake frame 200 or the column 120 through a complex structure.

[0048] Reference Figure 1 , Figure 2 In some embodiments of the present invention, a sludge collection trough 130 is provided in the middle of the bottom of the thickening tank 100, surrounding the column 120. A sludge outlet aaa is provided at the lower end or bottom of the sludge collection trough 130. The spiral roller 400 is adapted to scrape the sludge at the bottom of the thickening tank 100 to the sludge collection trough 130. A comb rake is also provided at the lower end of the rake frame 200. The comb rake is adapted to push the sludge in the sludge collection trough 130. The load on the rake frame 200 is relatively small. The sludge outlet aaa is continuously and orderly replenished with sludge. The sludge outlet aaa is not easily blocked.

[0049] Reference Figure 1 , Figure 2In some embodiments of the present invention, an arc-shaped bubble-blocking net 230 is provided above the spiral roller 400. The two ends of the arc-shaped bubble-blocking net 230 are respectively fixed to the corresponding vertical extension arm 210, such as by screw connection, riveting, or welding. The arc-shaped bubble-blocking net 230 is suitable for cutting or pinching the floating air bubbles. Specifically, when the air bubble is larger than the mesh of the arc-shaped bubble-blocking net 230, the air bubble rises upward. The air bubble is cut by the arc-shaped bubble-blocking net 230, or the air bubble tries to pass through the mesh quickly, and is pinched / squeezed by the edge of the mesh. On the other hand, the arc-shaped bubble-blocking net 230 is suitable for cutting the floating air bubbles during rotation to precipitate the mineral material inside the floating air bubbles and floating air bubbles. The arc-shaped bubble-blocking net 230 is suitable for providing an upward force to the rake frame 200 and the spiral roller 400 through the air bubbles, reducing the friction between the spiral roller 400 and the bottom of the pool / sludge.

[0050] In some embodiments of the present invention, the rake frame 200 is arranged with multiple arc-shaped bubble-blocking nets 230 in the vertical direction, and the rake frame 200 breaks up more and more floating bubbles in the thickening pool 100.

[0051] Reference Figure 2 , Figure 4 In some embodiments of the present invention, multiple arc-shaped bubble-blocking nets 230 include a first bubble-blocking net 231 and a second bubble-blocking net 232 adjacent to the first bubble-blocking net 231, such as an integrally molded assembly. The first bubble-blocking net 231 and the second bubble-blocking net 232 form a wing, similar to an airplane wing or a bird wing. According to Bernoulli's principle, the wing obtains lift force based on the velocity difference of the fluid on the upper and lower surfaces. The first bubble-blocking net 231 and the second bubble-blocking net 232 cut the bubbles at different flow velocities. The tail of the wing is suitable for the convergence, merging and bursting of the upper and lower fluid bubbles. The merging of the bubbles makes their diameter larger, unstable and easy to burst.

[0052] The above embodiments are only used to illustrate the technical solutions of the present invention and are not intended to limit them. Any modifications or equivalent substitutions that do not depart from the spirit and scope of the present invention should be covered within the scope of the technical solutions of the present invention.

Claims

1. A slurry centring densifier, characterised in that, include: A thickening tank (100) is provided with an overflow trough (110) and a column (120) extending upward from the bottom of the thickening tank (100). The overflow trough (110) extends along the inner peripheral wall of the thickening tank (100) and is adapted to discharge the mineral water overflowing from the thickening tank (100). The rake frame (200) is rotatably connected to the column (120) and is also connected to the rake driving power mechanism (300). The spiral roller (400) is rotatably connected at both ends to the two vertical arms (210) of the rake frame (200). The spiral roller (400) extends along the bottom of the thickening tank (100) from the middle of the bottom to the inner wall of the thickening tank (100). The rake frame (200) is adapted to drive the spiral roller (400) to roll along the bottom of the thickening tank (100) and / or the sludge, so as to scrape the sludge from the bottom of the tank towards the middle of the bottom.

2. The in-basin thickener for facilitating slimes, according to claim 1, wherein, The column (120) is provided with a slurry inlet channel (121), the slurry inlet of the slurry inlet channel (121) is located at the top of the column (120) and is adapted to connect to the slurry inlet pipe, and the slurry outlet of the slurry inlet channel (121) is adapted to supply slurry to the thickening tank (100) in a manner lower than the liquid level.

3. The in-basin thickener for facilitating slimes, according to claim 1, wherein, One end of the rake frame (200) is rotatably connected to the column (120), and the other end is provided with a roller (310). The rake frame (200) is provided with a rake motor (320) or a rake engine that is connected to the roller (310) for transmission. The roller (310) is adapted to travel along the upper edge of the thickening tank (100).

4. The in-basin thickener for facilitating slimes according to claim 3, characterized in that, The upper end of the rake frame (200) is a frame that supports a trestle panel, and the other end of the frame is suitable for workers to go up and down the trestle panel.

5. A slurry mid-thickener according to any one of claims 1 to 4, characterised in that, The vertical extension arm (210) is integrally formed with a fixed gripping piece (211), and the fixed gripping piece (211) is screwed to a detachable gripping piece (212). The fixed gripping piece (211) and the detachable gripping piece (212) are adapted to jointly grip the end of the spiral roller (400).

6. The facilitator for thickening mineral slime according to claim 5, characterized in that, The end of the spiral roller (400) is fitted with a rolling bearing (410), and sealing felt rings (420) are provided on both sides of the rolling bearing (410). The fixed clamping piece (211) and the detachable clamping piece (212) simultaneously grip the rolling bearing (410) and its corresponding sealing felt ring (420).

7. The facilitator for thickening mineral slime according to any one of claims 1 to 4, characterized in that, A defoaming drain pipe (500) is installed between the column (120) and the edge of the thickening tank (100). The rake frame (200) is equipped with a bubble-driving blade (220) extending radially along the thickening tank (100). The bubble-driving blade (220) is adapted to rotate with the rake frame (200) to push the bubbles on the liquid surface of the thickening tank (100) downwards to the defoaming drain pipe (500).

8. The facilitator for thickening mineral slime according to any one of claims 1 to 4, characterized in that, An arc-shaped bubble-blocking net (230) is provided above the spiral roller (400). The two ends of the arc-shaped bubble-blocking net (230) are respectively fixed to the corresponding vertical extension arm (210). The arc-shaped bubble-blocking net (230) is suitable for cutting or crushing floating bubbles. The arc-shaped bubble-blocking net (230) is suitable for cutting floating bubbles during swinging to release the mineral material inside the bubbles. The arc-shaped bubble-blocking net (230) is suitable for providing an upward force to the rake frame (200) and the spiral roller (400) through the bubbles.

9. The thickener for facilitating the centralization of mineral slime according to claim 8, characterized in that, The rake frame (200) has multiple arc-shaped bubble-blocking nets (230) arranged in the vertical direction.

10. The facilitator for thickening mineral slime according to claim 9, characterized in that, The plurality of arc-shaped bubble-blocking nets (230) include a first bubble-blocking net (231) and a second bubble-blocking net (232) adjacent to the first bubble-blocking net (231). The first bubble-blocking net (231) and the second bubble-blocking net (232) form a wing. The wing obtains an upward force based on the fluid velocity difference between the upper and lower surfaces. The first bubble-blocking net (231) and the second bubble-blocking net (232) cut the bubbles at different flow velocities. The tail of the wing is suitable for the co-bursting of fluid bubbles.

Images