Thickener feeding device capable of preventing clamping stagnation and use method

Abstract

The invention discloses a thickener feeding device capable of preventing clamping stagnation, and belongs to the technical field of thickener feeding devices. The device comprises a connecting pipe arranged between two sets of pipelines in a matched mode, an opening is formed in the bottom of the connecting pipe, a flow dividing block is fixedly arranged above the opening, gaps convenient for ore pulp to penetrate are formed between the opening and the front end and the rear end of the flow dividing block, and an arc-shaped protrusion is arranged at the bottom of the flow dividing block. The lower end of the protrusion extends to the position below the opening. When the device is used, slag is separated from ore pulp above through the flow dividing block, the separated slag falls into the material dividing box below the opening under the action of gravity, and suspended particles entering the opening flow out from the opening in the rear end of the flow dividing block along with the ore pulp. Therefore, different movement trends of the slag and the fine particles under the action of gravity are fully utilized, the slag is efficiently separated from the ore pulp, the situation that the slag enters the thickener to affect movement of the rake frame is effectively avoided, and the clamping stagnation problem is reduced.

Description

Technical Field

[0001] This invention relates to the field of feeder technology for thickeners, and particularly to a feeder device for thickeners that prevents jamming and its usage. Background Technology

[0002] A thickener is a continuously operating thickening and clarification device, mainly used for dewatering concentrate and tailings slurry in wet mineral processing operations. It is also widely used for thickening and purifying solid slurries in coal, steel, chemical, building materials, water sources, and sewage treatment industries.

[0003] In gold ore production, the raw ore first undergoes crushing and grinding to significantly reduce its particle size. Then, centrifugal force is used to separate the slurry: fine particles are discharged from the overflow outlet, becoming the qualified product. After this closed-loop "grinding-classification" cycle, a fine-particle slurry with uniform particle size and suspended particles in the liquid is generally obtained. This overflow portion then enters the thickener. To ensure effective thickening, flocculants are usually added to the feed to cause the fine particles to agglomerate, accelerating sedimentation and thus efficiently separating the clarified liquid and the concentrated underflow.

[0004] In the raw ore of a gold mine, if the preceding crushing and grinding classification system is not thorough, coarse particles that should have been removed or returned for regrinding will be mixed into the slurry and enter the thickener. These coarse, hard, and angular particles are not easily scraped away by the rake like fine mud. They accumulate in large quantities on the moving side of the rake, causing a sharp increase in rotational resistance and resulting in jamming. Summary of the Invention

[0005] This invention provides a feed device for a thickener that prevents jamming, which can solve the problem in the prior art where large particles in the slurry entering the thickener affect the movement of the rake frame and cause jamming.

[0006] A feed device for a thickener to prevent jamming includes a connecting pipe fitted between two sets of pipelines. The bottom of the connecting pipe has an opening, and a diverter block is fixedly installed above the opening. There are gaps between the opening and the front and rear ends of the diverter block to facilitate the passage of slurry. The bottom of the diverter block has an arc-shaped protrusion, the lower end of which extends below the opening. The slurry in the pipeline flows through the connecting pipe, and the larger slag moves closer to the bottom of the connecting pipe. Under the action of the diverter block, it separates from the slurry above. A distribution box is fixedly installed below the opening, and the slag falls into the distribution box under the action of gravity, away from the connecting pipe.

[0007] As a further aspect of the present invention: the bottom of the distribution box is connected to a storage box for slag, and the bottom of the storage box is provided with an output mechanism that can automatically transport the accumulated particles to the outside.

[0008] As a further aspect of the present invention: the output mechanism includes a spiral shaft rotatably disposed at the bottom of the storage box, the storage box is provided with a material conveying pipe along the output direction of the spiral shaft, and a first motor is disposed in the storage box away from the output direction of the spiral shaft, the output end of the first motor being coaxially and fixedly connected to the spiral shaft.

[0009] As a further aspect of the present invention: a groove matching the shape of the spiral shaft is provided in the middle of the bottom of the storage box, and inwardly inclined sidewalls are provided on both sides of the groove.

[0010] As a further embodiment of the present invention: the bottom of the material distribution box is fixedly connected to a crushing box, the crushing box is provided with a crushing mechanism that can further crush the particles, and an output pipe is provided on one side of the crushing box.

[0011] As a further aspect of the present invention: the crushing mechanism includes a second motor fixedly connected to the bottom of the crushing box, and a transmission shaft rotatably disposed inside the crushing box is coaxially fixedly disposed at the output end of the second motor. A grinding disc is fixedly disposed at the upper end of the transmission shaft, and an annular slope is provided on the upper edge of the grinding disc. The gap between the upper inner wall of the crushing box and the grinding disc is configured to decrease as it extends downwards.

[0012] As a further embodiment of the present invention: a centrifugal impeller is coaxially fixedly disposed on the side of the transmission shaft.

[0013] As a further aspect of the present invention: the bottom of the material distribution box and the surrounding area of ​​the communication port of the crushing box are provided with an upwardly sloping surface.

[0014] As a further aspect of the present invention: the material distribution box is equipped with a storage detection component for detecting the material quantity.

[0015] A method of using a feed device for a concentrator to prevent jamming includes the following steps: S1: The crushed and ground slurry is transported to the inlet of the thickener through pipelines and connecting pipes; S2: The slag in the slurry will adhere to the bottom of the connecting pipe and move into the opening, and fall into the distribution box under the action of gravity; S3: When dealing with a large amount of slag, the slag is discharged in a timely manner through the output mechanism; when dealing with a small amount of slag, it is crushed through the crushing mechanism.

[0016] The beneficial effects of this invention are: 1. This invention features an opening at the bottom of the connecting pipe, with a diverter block fixed above it. Gaps exist between the opening and the front and rear ends of the diverter block to facilitate slurry passage, and the bottom of the diverter block has an arc-shaped protrusion extending below the opening. When the slurry flows in the pipeline, fine particles in the slurry are suspended in the solution, while larger slag particles move towards the bottom of the connecting pipe due to their own gravity and are pushed towards the opening by the slurry. At this point, the diverter block separates the slag from the slurry above. The separated slag falls into the distribution box below the opening under gravity, while the suspended particles that entered the opening flow out with the slurry from the rear opening of the diverter block. This fully utilizes the different movement trends of slag and fine particles under gravity, efficiently separating the slag from the slurry, effectively preventing slag from entering the thickener and affecting the movement of the rake frame, and reducing the occurrence of jamming problems.

[0017] 2. When the slag content is high, this invention can utilize a structure where the bottom of the distribution box is connected to a storage box, with the storage box equipped with an output mechanism. The first motor of the output mechanism can intermittently start, driving the screw shaft to rotate and promptly transport the accumulated slag to the re-grinding station for batch grinding, preventing accumulation. The distribution box also contains a storage detection component; when there is excessive slag, it sends a signal to continuously start the first motor, ensuring sufficient slag output. When the slag content is low, a structure where the bottom of the distribution box is fixedly connected to a crushing box can be used. The crushing mechanism in the crushing box starts intermittently, further crushing the slag before discharging it through the output pipe into the thickener. This avoids the need to additionally start the grinding device for small amounts of slag, saving energy and labor costs, while ensuring the quality of the slurry entering the thickener, improving the applicability and processing efficiency of the device. Attached Figure Description

[0018] Figure 1 A schematic diagram of the first embodiment of a feed device for a thickener to prevent jamming provided by the present invention; Figure 2 A schematic diagram of the longitudinal section structure of a first embodiment of a thickener feeding device for preventing jamming provided by the present invention; Figure 3 A schematic diagram of the second embodiment of a feed device for a thickener to prevent jamming provided by the present invention; Figure 4 This is a schematic diagram of the longitudinal section structure of a second embodiment of a feed device for a thickener to prevent jamming, provided by the present invention.

[0019] Explanation of reference numerals in the attached figures: 1. Connecting pipe; 101. Opening; 102. Diverter block; 2. Feed box; 3. Storage box; 4. Output mechanism; 401. First motor; 402. Screw shaft; 403. Conveying pipe; 5. Storage capacity detection component; 6. Crushing box; 601. Output pipe; 7. Crushing mechanism; 701. Second motor; 702. Drive shaft; 703. Grinding disc; 704. Centrifugal impeller. Detailed Implementation

[0020] The specific embodiments of the present invention will be described in detail below, but it should be understood that the scope of protection of the present invention is not limited to the specific embodiments.

[0021] like Figures 1 to 4 As shown, an embodiment of the present invention provides a feed device for a thickener to prevent jamming, comprising a connecting pipe 1 installed between two sets of pipelines via a flange. An opening 101 is provided at the bottom of the connecting pipe 1, and a diverter block 102 is fixedly installed above the opening 101. Figure 2 As shown, there are gaps of a certain width between the opening 101 and the front and rear ends of the diversion block 102, which facilitate the passage of slurry. The bottom of the diversion block 102 has an arc-shaped protrusion extending below the opening 101, which facilitates the diversion of slurry to the bottom of the protrusion. In actual pipeline operation, the slurry in the pipeline flows through the connecting pipe 1. Normally, particles in fine slurry remain suspended in the solution, while larger slag particles move closer to the bottom of the connecting pipe 1 due to their own gravity and other factors. Driven by the continuous flow of the slurry, these slag particles approach the opening 101. At this point, under the action of the diversion block 102, the slag separates from the slurry above. A distribution box 2 is fixedly installed below the opening 101. The separated slag will fall into the distribution box 2 under the action of gravity, thus moving away from the connecting pipe 1. The particles suspended in the slurry will continue to flow out from the opening 101 at the rear end of the diversion block 102 along with the slurry, thereby achieving the effect of slag separation.

[0022] Furthermore, the bottom of the distribution box 2 is connected to a storage box 3 for storing slag. The bottom of the storage box 3 is equipped with an output mechanism 4 that can automatically convey the accumulated particles to the outside. The output mechanism 4 includes a rotatable screw shaft 402 mounted at the bottom of the storage box 3, such as... Figure 2 As shown, a conveying pipe 403 is provided in the storage tank 3 along the output direction of the spiral shaft 402. A first motor 401 is provided in the storage tank 3 at a position away from the output direction of the spiral shaft 402. The output end of the first motor 401 is coaxially and fixedly connected to the spiral shaft 402. In use, the first motor 401 can start intermittently. When a certain amount of slag accumulates in the storage tank 3, the first motor 401 starts and drives the spiral shaft 402 to rotate, thereby timely conveying the slag through the conveying pipe 403 to the regrinding station for batch grinding, avoiding the slag from accumulating in the storage tank 3 for a long time.

[0023] The bottom center of the storage box 3 has a groove that matches the shape of the spiral shaft 402, and inwardly inclined sidewalls are provided on both sides of the groove. This allows the slag to be concentrated at the bottom of the storage box 3 after entering it, making it easier for the spiral shaft 402 to output the slag uniformly when rotating, improving output efficiency and preventing the slag from being scattered and accumulated in the storage box 3, which would affect the output effect.

[0024] In one optional embodiment, the material distribution box 2 is equipped with a material storage detection component 5. The storage detection component 5 can be an inclined, elastically deformable plate with strain gauge sensors distributed at its bottom. During normal operation, when the amount of slag is small, it will only accumulate inside the storage box 3. At this time, because of its inclined design, the plate is largely unaffected by the slag pressure, and the signals detected by the strain gauge sensors are within the normal range. When the amount of slag is excessive, it may accumulate above the plate, exerting pressure on the plate due to gravity. When the screw shaft 402 outputs material, it causes the slag inside both the distribution box 2 and the storage box 3 to move downwards, causing the plate to bend downwards. At this time, the strain gauge sensors detect that the bending degree of the plate exceeds a set threshold, and transmit an electrical signal to the control system. Upon receiving the signal, the control system continuously starts the first motor 401, thereby increasing the output time and quantity of slag, ensuring more complete slag output, and preventing excessive slag accumulation from affecting the normal operation of the device.

[0025] In this embodiment, after the thickener feeding device starts operating, the slurry in the pipeline continuously flows through the connecting pipe 1. Since the particles in the fine slurry are suspended in the solution, while the larger slag particles move closer to the bottom of the connecting pipe 1 due to their own gravity and other factors, the diverting block 102 fixed above the opening 101 separates the slag from the slurry above. The separated slag falls into the distribution box 2 below the opening 101 under gravity, while the particles suspended in the slurry inside the opening 101 continue to flow out from the opening 101 at the rear end of the diverting block 102, achieving initial separation of the slag and slurry. The slag in the distribution box 2 enters the storage box 3 connected to the bottom. The first motor 401 is in an intermittent self-starting standby state, achieving the effect of periodic cleaning.

[0026] For slurries with low slag content, the aforementioned device collects only a small amount of slag with each discharge. In this case, there is no need to restart the grinding device, as starting the grinding device consumes energy and labor costs, and the grinding efficiency for small amounts of slag is not high. In the second specific embodiment, the difference from the above embodiment is that a crushing box 6 is fixedly connected to the bottom of the distribution box 2. The crushing box 6 is equipped with a crushing mechanism 7 that can further crush the particles. The crushing mechanism 7 is started intermittently, and an output pipe 601 is provided on one side of the crushing box 6. When the slag content is low, the separated slag will enter the crushing box 6, and the further crushed slag particles will continue to be discharged from the output pipe 601 into the thickener. This avoids the need to restart the grinding device due to a small amount of slag, while ensuring the quality of the slurry entering the thickener and reducing the impact of coarse particles on the movement of the thickener rake.

[0027] like Figure 4 As shown, the crushing mechanism 7 includes a second motor 701 fixedly connected to the bottom of the crushing chamber 6. A transmission shaft 702, rotatably mounted inside the crushing chamber 6, is coaxially fixed to the output end of the second motor 701. A grinding disc 703 is fixedly mounted on the upper end of the transmission shaft 702. The upper edge of the grinding disc 703 has an annular slope. The gap between the upper inner wall of the crushing chamber 6 and the grinding disc 703 decreases towards the bottom. When the second motor 701 is intermittently started, it drives the transmission shaft 702 to rotate, which in turn drives the grinding disc 703 to rotate. The slag entering the crushing chamber 6 is located between the upper inner wall of the crushing chamber 6 and the grinding disc 703. As the grinding disc 703 rotates, the slag is ground in the gap between them, thus achieving the grinding operation. The bottom of the feed box 2 and the surrounding area of ​​the connection between the feed box 2 and the crushing box 6 are provided with an upward sloping surface, which makes it easy for the slag to fall automatically into the crushing box 6 under the action of vibration or gravity. There is no need to set up an additional device to push the slag into the crushing box 6, which simplifies the device structure and ensures that the slag can enter the crushing box 6 smoothly to complete the crushing effect.

[0028] In an optional embodiment, to expedite the removal of the pulverized slag particles from the grinding disc 703, a centrifugal impeller 704 can be coaxially fixed to the side of the drive shaft 702. When the drive shaft 702 rotates, it drives the centrifugal impeller 704 to rotate. The rotation of the centrifugal impeller 704 generates centrifugal force, which propels the slag particles out of the output pipe 601, accelerating the discharge speed of the slag particles and improving the overall processing efficiency of the device.

[0029] In this embodiment, after the thickener feeding device is started, the slurry in the pipeline flows through the connecting pipe 1. Similarly, the particles in the fine slurry are suspended, while the larger slag particles move near the bottom of the connecting pipe 1 and are pushed by the slurry towards the opening 101 at the bottom of the connecting pipe 1. The diverting block 102 separates the slag from the slurry above. The separated slag falls into the distribution box 2 below the opening 101 under the action of gravity, while the suspended particles flow out from the rear opening 101 of the diverting block 102, completing the initial separation of the slag and the slurry.

[0030] The slag entering the crushing chamber 6 is located between the upper inner wall of the crushing chamber 6 and the grinding disc 703. At this time, the second motor 701, which is fixedly connected to the bottom of the crushing chamber 6, starts intermittently, driving the transmission shaft 702, which is fixedly connected to its output end, to rotate. The transmission shaft 702 then drives the grinding disc 703, which is fixedly mounted at the upper end, to rotate. The upper edge of the grinding disc 703 has an annular slope, and the gap between the upper inner wall of the crushing chamber 6 and the grinding disc 703 decreases as it extends downwards. The slag is ground in the gap between the two, achieving further crushing of the particles.

[0031] To expedite the removal of the pulverized slag particles from the grinding disc 703, a centrifugal impeller 704, coaxially fixed to the side of the drive shaft 702, rotates with the drive shaft 702. The rotation of the centrifugal impeller 704 generates centrifugal force, which propels the slag particles out of the output pipe 601 located on one side of the pulverizing box 6, accelerating the discharge speed of the slag particles and reducing the impact of coarse particles on the movement of the thickener rake frame.

[0032] The above-disclosed embodiments are merely a few specific examples of the present invention. However, the embodiments of the present invention are not limited thereto, and any variations that can be conceived by those skilled in the art should fall within the protection scope of the present invention.

Claims

1. A choke resistant thickener feedwell characterized by, The utility model relates to a kind of ore slurry distribution device, including the connecting pipe (1) being arranged between two groups of pipelines, the bottom of the connecting pipe (1) is provided with opening (101), the opening (101) is fixedly provided with the flow divider (102) above, the front end and the rear end between the opening (101) and flow divider (102) are all gap for ore slurry to pass through, the bottom of the flow divider (102) is provided with arc convex, the convex lower end extends to the below of opening (101), the ore slurry in the pipeline flows through the connecting pipe (1), the ore slag with larger volume can move close to the bottom of the connecting pipe (1), and under the action of the flow divider (102), it is separated from the ore slurry above, the opening (101) below is fixedly provided with distribution box (2), and the ore slag can fall into the distribution box (2) under the action of gravity, away from the connecting pipe (1).

2. A choke resistant thickener feedwell as claimed in claim 1 wherein, The bottom of the distribution box (2) is communicated with a storage tank (3) for storing the ore slag, and the storage tank (3) is provided with an output mechanism (4) at the bottom for automatically conveying the accumulated particles to the outside.

3. A choke resistant thickener feedwell as claimed in claim 2 wherein, The output mechanism (4) includes a spiral shaft (402) rotatably arranged at the bottom of the storage tank (3), the storage tank (3) is provided with a material conveying pipe (403) along the output direction of the spiral shaft (402), the storage tank (3) is provided with a first motor (401) away from the output direction of the spiral shaft (402), and the output end of the first motor (401) is coaxially fixedly connected with the spiral shaft (402).

4. A choke resistant thickener feedwell as claimed in claim 3 wherein, A groove matched with the shape of the spiral shaft (402) is arranged at the middle of the bottom of the storage tank (3), and side walls inclined inward are arranged on both sides of the groove.

5. A choke resistant thickener feedwell as claimed in claim 1 wherein, The bottom of the distribution box (2) is fixedly communicated with a crushing box (6), the crushing box (6) is provided with a crushing mechanism (7) inside for further crushing the particles, and the crushing box (6) is provided with an output pipe (601) on one side.

6. A choke resistant thickener feedwell according to claim 5 wherein, The crushing mechanism (7) includes a second motor (701) fixedly connected with the bottom of the crushing box (6), the output end of the second motor (701) is coaxially fixedly provided with a transmission shaft (702) rotatably arranged inside the crushing box (6), the upper end of the transmission shaft (702) is fixedly provided with a grinding disc (703), the upper edge of the grinding disc (703) is provided with an annularly arranged slope, and the gap between the upper inner wall of the crushing box (6) and the grinding disc (703) is arranged in a state that the gap becomes smaller as it extends downward.

7. A choke resistant thickener feedwell according to claim 6 wherein, The side surface of the transmission shaft (702) is coaxially fixedly provided with a centrifugal impeller (704).

8. A choke resistant thickener feedwell assembly as claimed in claim 7 wherein, The bottom of the distribution box (2) is provided with a slope inclined upward around the communication port of the crushing box (6).

9. A choke resistant thickener feedwell assembly as claimed in claim 4 wherein, The distribution box (2) is provided with a storage detection assembly (5) for detecting the material inside.

10. The method of claim 9, wherein the step of preventing the material from building up on the surface of the rotating drum comprises the step of: The utility model includes the following steps: S1: the ore slurry after crushing and grinding is conveyed to the inlet of the thickener through the pipeline and through the connecting pipe (1); S2: the ore slag in the ore slurry can move close to the bottom of the connecting pipe (1) to the inside of the opening (101), and falls into the inside of the distribution box (2) under the action of gravity; S3: In the face of slag quantity more processing technology, through the output mechanism (4) and timely discharge; in the face of slag quantity less processing technology, through the crushing mechanism (7) for crushing treatment.

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