Single-channel thickening system and thickener

Abstract

The single-channel thickening system comprises a barrel, a material distribution plate and a spiral dam, the top of the barrel is provided with a feeding port and the spiral dam in the tangential direction, the spiral dam is spirally arranged along the axis of the barrel, the top end of the spiral dam is in butt joint with the feeding port, and the top end of the spiral dam is in butt joint with the material distribution plate. The spiral dam is used for guiding ore pulp vortex to overflow downwards in the axis direction of the barrel, the material distribution plate is arranged at the bottom of the barrel and provided with a guide face, the guide face is arranged towards the barrel, the height of the guide face is gradually decreased from the middle position of the guide face to the circumferential edge position of the guide face, and a discharging gap is formed between the guide face and the bottom of the barrel. The guide face can guide ore pulp overflowing out of the spiral dam to the discharging gap to flow out. The spiral dam can guide the pulp vortex to be uniform in speed and is matched with the material distribution plate to uniformly distribute the pulp, so that the purpose that the pulp enters the thickener pool body at uniform speed and flow and uniformly distributed is achieved, and the treatment efficiency of the thickener is improved.

Description

Technical Field

[0001] This utility model relates to the field of slurry thickening technology, specifically to a single-channel thickening system and thickener. Background Technology

[0002] Currently, in the hydrometallurgical process for laterite nickel ore, the ore slurry produced from ore washing is typically fed into a thickener for thickening. Once the concentration reaches a certain value, it is then mixed with sulfuric acid and steam and injected into a high-pressure reactor for smelting to extract nickel and cobalt from the laterite nickel ore. During the thickening process, the ore slurry needs to be introduced, thickened, and discharged from the bottom, while the supernatant overflows from an overflow weir. For example, in related technologies, the thickener may include: an annular pool containing the supernatant; an overflow weir located within the annular pool; and a fine filtration unit, at least one of which is arranged circumferentially along the overflow weir, with an outlet pipe connected to the overflow weir via the outlet pipe.

[0003] In most of the aforementioned technologies, the slurry is directly introduced from the feed inlet. However, the direct introduction of the slurry results in uneven rates, flow fluctuations, and uneven distribution. Uneven slurry introduction leads to uneven loads in the sedimentation zone, affecting the effective settling of solid particles and thus reducing sedimentation efficiency and solid recovery rate. Flow fluctuations may cause a sudden increase in slurry concentration in local areas, forming areas with excessively high concentrations, which hinder particle settling and may even cause blockages, all of which lead to a decrease in sedimentation efficiency. Utility Model Content

[0004] The purpose of this invention is to overcome the above-mentioned technical deficiencies and propose a single-channel thickening system and thickener to solve the technical problems of uneven rate, flow fluctuation and uneven distribution in the direct introduction of slurry in related technologies.

[0005] To achieve the above-mentioned technical objectives, the present invention adopts the following technical solution:

[0006] In a first aspect, this utility model provides a single-channel thickening system, comprising:

[0007] A cylindrical body, wherein a feed inlet is provided at the top of the cylindrical body along the tangential direction;

[0008] A spiral dam is provided, which is spirally arranged along the axis of the cylinder. The top of the spiral dam is connected to the feed inlet. The spiral dam is used to guide the slurry vortex to overflow downward in the axial direction of the cylinder.

[0009] A distributing plate is arranged at the bottom of the barrel, the distributing plate has a guide surface, the guide surface is arranged towards the barrel, the height of the guide surface gradually decreases from the middle position of the guide surface to the circumferential edge position of the guide surface, the guide surface and the bottom of the barrel have a discharging gap, and the guide surface can guide the slurry overflowing from the spiral dam to flow out at the discharging gap.

[0010] In one of the embodiments, the single-channel thickening system further comprises a rake, and the rake comprises:

[0011] A rotating shaft is arranged axially along the barrel, the barrel is rotatably arranged on the rotating shaft, and the distributing plate is rotatably arranged on the rotating shaft, and the guide surface is arranged circumferentially along the rotating shaft.

[0012] A scraper is attached to the distributing plate, and the bottom of the scraper is attached to the guide surface, and the scraper is connected to the rotating shaft, and the rotating shaft can drive the scraper to rotate to push the sediment on the distributing plate to flow out of the discharging gap.

[0013] In one of the embodiments, the rake further comprises a rake frame, the rake frame is connected to the rotating shaft and / or the scraper, and the surface of the rake frame is attached to the inner wall of the barrel, and the rotating shaft can drive the rake frame to rotate to scrape the sediment on the inner wall of the barrel.

[0014] In one of the embodiments, the rake frame is connected to the scraper to form a V-shaped structure, and the tip of the V-shaped structure is inserted into the discharging gap; and / or,

[0015] The rake further comprises a support rod, one end of the support rod is connected to the rake frame, and the other end of the support rod is connected to the scraper.

[0016] In one of the embodiments, the bottom of the distributing plate is fixedly connected to the barrel through an extension frame.

[0017] The extension frame is provided with one or more, and when multiple extension frames are provided, the multiple extension frames are arranged at intervals along the circumference of the distributing plate.

[0018] In one of the embodiments, the extension frame comprises:

[0019] A first connecting rod is connected to the distributing plate.

[0020] A second connecting rod is connected to the barrel.

[0021] A transition rod is connected between the first connecting rod and the second connecting rod to form a containing groove, the transition rod can separate the second connecting rod from the edge of the cloth plate, and the containing groove can accommodate the V-shaped structure part.

[0022] In one of the embodiments, the spiral dam starts spiraling from the feed inlet and spirals in a ring shape.

[0023] In one of the embodiments, the inner edge of the spiral dam is provided with a flow blocking weir, and the flow blocking weir is gradually lowered along the spiral direction of the spiral dam starting from the feed inlet.

[0024] In one of the embodiments, the top of the cylinder is provided with a flocculant adding port at a position at least one quarter of a circle away from the feed inlet, and the discharge end of the flocculant adding port is directed towards the spiral dam.

[0025] In a second aspect, the utility model also provides a thickener comprising the single-channel thickening system in any of the above-mentioned schemes.

[0026] Compared with the related art, the single-channel thickening system provided by the utility model can guide the ore pulp vortex to flow at a uniform speed by connecting the feed inlet arranged in a tangent on the cylinder with the spiral dam, and the ore pulp can overflow downwards from the spiral dam towards the axis direction of the cylinder, and the ore pulp can be uniformly distributed by cooperating with the cloth plate below, so that the ore pulp can enter the thickener pool body at a uniform speed, flow and be uniformly distributed, the processing efficiency of the thickener is improved, the residence time of the ore pulp in the thickener is shortened, and the processing amount per unit time is increased. BRIEF DESCRIPTION OF DRAWINGS

[0027] Figure 1 is a whole structure schematic view of the single-channel thickening system provided by the utility model embodiment;

[0028] Figure 2 is a perspective view schematic view of the single-channel thickening system provided by the utility model embodiment;

[0029] Figure 3 is a first angle internal structure schematic view of the single-channel thickening system provided by the utility model embodiment;

[0030] Figure 4 is a second angle internal structure schematic view of the single-channel thickening system provided by the utility model embodiment;

[0031] Figure 5 is a structure schematic view of the thickener provided by the utility model embodiment.

[0032] Explanation of reference signs: 1, cylinder; 101, feeding port; 2, cloth plate; 201, discharging gap; 202, extension frame; 202a, first connecting rod; 202b, second connecting rod; 202c, transition rod; 203, guide surface; 3, spiral dam; 301, flow blocking weir; 4, rake machine; 41, rotating shaft; 42, rake frame; 43, scraper; 44, pool body rake frame; 5, flocculant adding port; 6, pool body; 601, conical surface; 602, ore discharging port. DETAILED DESCRIPTION

[0033] The utility model will be described in further detail below in combination with the drawings and examples. It can be understood that the specific examples described here are only used to explain the utility model, and not to limit the utility model. In addition, it should be noted that, in order to facilitate the description, only the part related to the utility model is shown in the drawings, not all structures.

[0034] In the description of the utility model, unless otherwise explicitly specified and limited, the terms "connected", "connected", "fixed" should be understood broadly, for example, it can be fixedly connected, or it can be detachably connected, or it can be integrated; it can be mechanically connected, or it can be electrically connected; it can be directly connected, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of two elements or the interaction relationship of two elements. For ordinary skilled in the art, the specific meaning of the above terms in the utility model can be understood according to the specific circumstances.

[0035] In the utility model, unless otherwise explicitly specified and limited, the first feature "on" or "below" the second feature can include that the first and second features are in direct contact, or that the first and second features are not in direct contact but are in contact through another feature between them. Moreover, the first feature "on", "above" and "above" the second feature includes that the first feature is directly above and obliquely above the second feature, or only indicates that the horizontal height of the first feature is higher than that of the second feature. The first feature "below", "below" and "below" the second feature includes that the first feature is directly below and obliquely below the second feature, or only indicates that the horizontal height of the first feature is less than that of the second feature.

[0036] In the description of the embodiment, the terms "up", "down", "left", "right" and other orientation or position relationship are based on the orientation or position relationship shown in the drawings, only for the convenience of description and simplification of operation, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, therefore it cannot be understood as a limitation of the utility model. In addition, the terms "first", "second" are only used to distinguish in the description, and have no special meaning.

[0037] In order to solve the technical problems of uneven speed, flow fluctuation and uneven distribution of the direct introduction of the slurry, the utility model provides a single channel thickening system, which can realize the uniform speed and flow introduction and uniform distribution of the ore slurry.

[0038] It should be noted that the single channel thickening system is used for but not limited to the thickener for ore slurry thickening, in order to facilitate the description, in the utility model, only the single channel thickening system applied to the thickener for ore slurry thickening is taken as an example to be described, and the principle of the single channel thickening system applied to other types of equipment is substantially same with the principle applied to the thickener for ore slurry thickening, which will not be described here.

[0039] Please refer to Figure 1 and Figure 2 , Figure 1 it is the whole structure schematic diagram of single channel thickening system in an embodiment of the utility model, Figure 2 it is the perspective schematic diagram of single channel thickening system in this embodiment, and the single channel thickening system includes cylinder body 1, cloth board 2 and spiral dam 3, wherein the top of cylinder body 1 is provided with feed inlet 101 along the tangent direction, the ore slurry introduced along the tangent is generated vortex flow along the inside of cylinder body 1, and the vortex flow helps to uniformly distribute the ore slurry on the whole cross section of the thickener instead of concentrating in the center or a certain point, so that the same treatment effect can be ensured in all areas, and local overload or uneven treatment is avoided, and the vortex flow can promote the solid particles in the ore slurry to quickly settle downwards, especially for fine particles, because the vortex flow will generate shear force, help to destroy the aggregation state between fine particles, and make it easier to settle.

[0040] Spiral dam 3 is spirally arranged along the axis of cylinder body 1, the top end of spiral dam 3 is connected with feed inlet 101, guides the uniform speed of ore slurry vortex flow, and overflows downwards from spiral dam 3 towards the axis direction of cylinder body 1, spiral dam 3 is connected at feed inlet 101, has the effect of delaying the high-speed direct injection of ore slurry downwards in a buffer mode, and by using the spiral shape, has the effect of guiding the ore slurry vortex flow, under the slow speed and vortex flow, promotes the uniform speed of ore slurry, and injects downwards in the mode of central overflow, reduces the flow fluctuation, and has the effect of uniform distribution.

[0041] The cloth plate 2 is arranged at the bottom of the cylinder 1, and the cloth plate 2 has a guide surface 203 arranged towards the cylinder 1, and the height of the guide surface 203 gradually decreases from the middle position of the guide surface 203 to the circumferential edge position of the guide surface 203, and the guide surface 203 and the bottom of the cylinder 1 have a discharge gap 201, and the guide surface 203 can guide the overflow of the spiral dam 3 to the discharge gap 201. The design of the cloth plate 2 helps the material to be more evenly distributed on the cross section of the thickener when entering the thickener. By adjusting the size of the discharge gap 201 between the cloth plate 2 and the inner wall bottom of the cylinder 1, the thickness of the material in the thickener can be controlled, and the settling speed and concentration efficiency of the material can be controlled. The spiral dam 3 cooperates with the cloth plate 2 to uniformly distribute the ore slurry into the thickener, and the ore slurry is uniformly distributed into the pool body 6 of the thickener at a uniform speed and flow rate, which improves the processing efficiency of the thickener, shortens the residence time of the ore slurry in the thickener, increases the processing capacity per unit time, and solves the technical problems of uneven speed, flow fluctuation and uneven distribution of the ore slurry in the related art.

[0042] It should be noted that the single-channel thickening system in the embodiment is mainly applied to non-easy-scar materials such as laterite nickel ore slurry. Easy-scar materials are easy to form scars on the scraper, which affects the settling performance of the material and is easy to form scar shedding. Non-easy-scar materials have low viscosity and are not easy to form crystalline deposits during flow, and have good fluidity.

[0043] Optionally, the discharge gap 201 between the cloth plate 2 and the bottom of the cylinder 1 can be designed to be adjustable. For example, a gap adjusting structure can be arranged between the cloth plate 2 and the cylinder 1, for example, the gap adjusting structure includes a sliding rod and a fastener, one end of the sliding rod is connected with the cloth plate 2, and the other end is in sliding connection with the cylinder 1. A plurality of fixing positions for connecting the fastener can be provided on the sliding rod and / or the cylinder 1. When the sliding rod is slid to the required position relative to the cylinder 1, the sliding rod and the cylinder 1 can be locked and fixed by the fastener such as a bolt or a pin at the corresponding fixing position, so as to adjust the discharge gap 201 to the required distance.

[0044] In one embodiment, please refer to Figure 2 and Figure 4In order to avoid the precipitation accumulated on the cloth plate 2 and avoid the blockage of the discharge gap 201, the single-channel thickening system further comprises a rake 4, the rake 4 comprises a rotating shaft 41 and a scraper 43, the cylinder 1 is rotatably arranged on the rotating shaft 41, and the cloth plate 2 is rotatably arranged on the rotating shaft 41, and the guide surface 203 is arranged along the circumference of the rotating shaft 41. The scraper 43 can be arranged in the radial direction of the cloth plate 2, the bottom of the scraper 43 is in close contact with the guide surface 203, and the scraper 43 is connected to the rotating shaft 41. The rotating shaft 41 can drive the scraper 43 to rotate to push the precipitation on the cloth plate 2 to flow out of the discharge gap 201. In this way, when the rotating shaft 41 rotates, the scraper 43 connected to the rotating shaft 41 also rotates. The bottom of the scraper 43 can be in close contact with the guide surface 203 of the cloth plate 2, so that the scraper 43 can effectively remove the precipitation formed on the cloth plate 2 during rotation, prevent the precipitation from accumulating unevenly on the cloth plate 2, reduce the residence time of the precipitation, and avoid the blockage of the system during movement. After the precipitation is uniformly removed, it is guided into the discharge gap 201 through the guide surface 203 and flows out, ensuring the continuity and uniformity of the ore slurry during the thickening process, reducing the resistance during the ore slurry treatment process, and improving the treatment efficiency of the ore slurry.

[0045] It can be understood that the rotating shaft 41 is correspondingly driven to rotate by a driving mechanism installed above the thickening tank body 6 of the thickener. The driving end of the driving mechanism is connected to the top of the rotating shaft 41 for driving the rotating shaft 41 to rotate. The driving mechanism is driven by a motor. The above is a feature in the related art, which will not be described in detail here.

[0046] Alternatively, the scraper 43 can be provided with a plurality of scrapers 43, and the plurality of scrapers 43 can be arranged along the circumference of the rotating shaft 41. The plurality of scrapers 43 are connected to the rotating shaft 41 to further improve the efficiency of removing the precipitation. For example, the scraper 43 can be provided with two scrapers 43, and the two scrapers 43 are symmetrically arranged about the rotating shaft 41. The plurality of scrapers 43 can also be designed at various inclination angles relative to the guide surface 203 to scrape the precipitation on the guide surface 203 at different angles and improve the scraping effect.

[0047] Alternatively, the height of the scraper 43 in the axial direction of the rotating shaft 41 can be equal, or the scraper 43 can have oppositely arranged first and second ends. The height of the scraper 43 in the axial direction of the rotating shaft 41 can gradually decrease from the first end of the scraper 43 to the second end of the scraper 43 to strengthen the overall structural strength of the scraper 43 connected to the rotating shaft 41. Alternatively, the height of the scraper 43 in the axial direction of the rotating shaft 41 can gradually increase from the first end of the scraper 43 to the second end of the scraper 43 to increase the structural strength of the second end of the scraper 43 and the rotating scraping area of the precipitation. During the scraping operation, the precipitation on one side of the scraper 43 is reduced to overflow to the other side of the scraper 43, and the precipitation residue is reduced.

[0048] In one of the embodiments, please refer to Figure 2 and Figure 4 In order to avoid the accumulation of deposits in the barrel 1, the rake 4 also includes a rake frame 42 connected with the rotating shaft 41 and / or the scraper 43, and the surface of the rake frame 42 is in close contact with the inner wall of the barrel 1. The rotating shaft 41 can drive the rake frame 42 to rotate to scrape the deposits off the inner wall of the barrel 1, thereby cleaning the inner wall of the barrel 1, reducing the accumulation of deposits on the inner wall of the barrel 1, and reducing the system efficiency decline caused by the blockage or interference of the deposits with the flow of the ore slurry, thereby improving the operation stability. Removing the deposits on the inner wall of the barrel 1 helps to maintain the cleanliness of the inner wall of the barrel 1, reducing the impact of the deposits on the flow rate and flow of the ore slurry, so that the ore slurry can overflow more uniformly under the guidance of the spiral dam 3.

[0049] Optionally, the rake frame 42 can be directly connected with the rotating shaft 41 through an extension rod, or the rake frame 42 can also be connected with the scraper 43 to realize the rotation of the rake frame 42 with the rotating shaft 41, or the rake frame 42 can also be connected with both the rotating shaft 41 and the scraper 43 to improve the overall structural strength and rotational stability of the rake frame 42 and the scraper 43.

[0050] In one of the embodiments, please refer to Figure 2 and Figure 4 The rake frame 42 is connected with the scraper 43, i.e., the scraper 43 is fixedly connected with the rake frame 42, and the scraper 43 is fixedly connected with the rotating shaft 41, thereby reducing the use of internal supports. The scraper 43 serves as the connection end of the rake frame 42 and the rotating shaft 41, achieving the cleaning effect on the inner wall of the barrel 1 and the cloth plate 2, and forming a V-shaped structure after the rake frame 42 is connected with the scraper 43. The tip of the V-shaped structure is inserted at the discharge gap 201, and in rotation, the deposits can be effectively concentrated and guided to the discharge gap 201, and the discharge gap 201 can be effectively cleaned to prevent the discharge gap 201 from being blocked.

[0051] In one of the embodiments, the rake 4 also includes a support rod connected at one end with the rake frame 42 and at the other end with the scraper 43. The support rod can support the rake frame 42 and the scraper 43, making the rake frame 42 more closely contact with the inner wall of the barrel 1 and the scraper 43 more closely contact with the guide surface 203.

[0052] Optionally, the support rod can be connected with the middle part of the rake frame 42 or the end part of the rake frame 42 away from the cloth plate 2, and the support rod can be connected with the middle part of the scraper 43, thereby improving the positional stability of the support rod, the rake frame 42 and the scraper 43. The support rod can be made of high-elastic material, which can further improve the close contact between the rake frame 42 and the inner wall of the barrel 1 and between the scraper 43 and the guide surface 203.

[0053] It can be understood that, in the possible embodiments, one end of the scraper 43 is directly fixedly connected with the rotating shaft 41, and one end of the rake frame 42 is fixedly connected with the rotating shaft 41 through the support.

[0054] In one of the embodiments, in order to connect the cloth plate 2 and the cylinder 1, the bottom of the cloth plate 2 is fixedly connected with the cylinder 1 through the extension frame 202, which is arranged in the cylinder 1 with the discharge gap 201 on the inner wall of the cylinder 1.

[0055] Among them, the extension frame 202 is provided with one or more, when the extension frame 202 is provided with multiple, the multiple extension frames 202 are arranged along the circumference of the cloth plate 2, which can form multi-point support and fixation, and improve the connection stability between the cloth plate 2 and the cylinder 1.

[0056] Further, in order to adapt to the structure that the scraper 43 is inserted into the discharge gap 201, the shape of the extension frame 202 is U-shaped, so as to avoid interference when the scraper 43 rotates in the discharge gap 201.

[0057] Among them, the extension frame 202 includes a first connecting rod 202a, a second connecting rod 202b and a transition rod 202c, the first connecting rod 202a is connected with the cloth plate 2, the second connecting rod 202b is connected with the cylinder 1, and the transition rod 202c is connected between the first connecting rod 202a and the second connecting rod 202b to form a containing groove, the transition rod 202c can separate the second connecting rod 202b from the edge of the cloth plate 2, the containing groove can accommodate the V-shaped structure part, and the first connecting rod 202a, the second connecting rod 202b and the transition rod 202c can form a U-shaped structure, which can not only increase the structural stability, but also avoid the cloth plate 2 and the scraper 43, and can also reduce the flow resistance to the ore pulp.

[0058] Among them, the first connecting rod 202a and the second connecting rod 202b can be arranged along the axial direction of the cylinder 1, and the transition rod 202c can be a support rod or an arc-shaped rod, which can separate the second connecting rod 202b from the edge of the cloth plate 2.

[0059] In one of the embodiments, please refer to Figure 2 and Figure 3 In order to avoid that the spiral dam 3 causes too strong vortex flow when the ore pulp is injected, the spiral dam 3 starts to spiral from the feed port 101 and spirals in a ring shape, so that the spiral dam 3 spirals in one layer, which can avoid the formation of too strong vortex flow, and the too strong vortex flow can cause unnecessary energy loss and can cause the already settled particles to be re-suspended, thereby reducing the processing efficiency. The embodiment can make the vortex flow speed of the ore pulp moderate by spiraling the spiral dam 3 in one layer.

[0060] Specifically, the spiral dam 3 starts spiraling from the feed inlet 101 so that the starting point of the spiral dam 3 is in alignment with the feed inlet 101, ensuring that the slurry is directly guided by the spiral dam 3 from the feed inlet 101, avoiding uncontrolled turbulence of the slurry at the initial stage of entering the thickener. The spiral dam 3 is designed as a single-layer annular spiral, rather than multi-layer, which can make the flow path of the slurry more gentle and continuous, avoiding the violent vortex and unstable flow of the slurry that may be caused by multi-layer spiral.

[0061] In this embodiment, the single-layer annular spiral dam 3 can provide effective uniform speed and flow purposes for the thickening of the slurry, but for the thickening process of other materials different from the slurry, the number of layers and the shape of the spiral of the spiral dam 3 can be adjusted according to the characteristics of the material. In practical application, the single-layer annular spiral dam 3 can be adjusted and optimized according to the specific characteristics of the slurry, such as viscosity, concentration, particle size, etc., and the processing requirements of the thickener, such as processing capacity, sedimentation efficiency, etc. For example, the spiral angle, width or height of the spiral dam 3 can be fine-tuned to adapt to different processing conditions, ensuring that better sedimentation effect and processing efficiency can be achieved under various working conditions.

[0062] In one embodiment, please refer to Figure 3 In order to guide the slurry on the spiral dam 3 to overflow uniformly to the center, the inner edge of the spiral dam 3 has a flow barrier weir 301, and the flow barrier weir 301 gradually decreases along the spiral direction of the spiral dam 3 starting from the feed inlet 101, for controlling the overflow flow of the slurry to the axis direction of the cylinder 1.

[0063] It can be understood that, since the feed inlet 101 gradually decreases from bottom to top along the spiral dam 3, the gradually decreasing flow barrier weir 301 can balance the overflow flow at the upper part of the spiral dam 3 with the overflow flow at the lower part, so as to achieve the purpose of uniformly overflowing the slurry downward along the spiral dam 3.

[0064] Further, the outer edge of the spiral dam 3 forms an inclination towards the inner edge towards the axis direction of the cylinder 1, which can guide the slurry to overflow to the axis direction of the cylinder 1, i.e. the spiral dam 3 can improve the centripetal force of the slurry through the inclination, improving the flow guiding effect on the slurry.

[0065] Specifically, the inclination of the outer edge of the spiral dam 3 towards the inner edge is designed to fine-tune the flow path of the slurry by changing the angle of the surface of the spiral dam 3. This inclination can be understood as the surface of the spiral dam 3 gradually approaching the axis of the cylinder 1 from the outside to the inside, forming a slight slope. When the slurry flows along the surface of the spiral dam 3, this slope will guide the slurry to move towards the axis of the cylinder 1, rather than falling vertically or spreading horizontally. Through the inclination design, the slurry will be guided to an area closer to the axis of the cylinder 1 during the overflow process, which helps to evenly distribute the slurry and avoid local concentration caused by direct falling, improving the sedimentation efficiency.

[0066] The overflow of the slurry towards the axis direction can reduce disturbance to the settled particles and avoid the re-suspension phenomenon in the sedimentation zone caused by excessive horizontal flow, which helps to maintain the stability of the sedimentation zone and improve the settling speed and quality of solid particles. An appropriate inclination angle can ensure that the slurry overflows at an appropriate speed, neither too fast to cause a decrease in sedimentation efficiency, nor too slow to affect the processing capacity. By guiding the slurry to overflow towards the axis direction, the system pressure fluctuations caused by local vortex can be reduced, enhancing the stability of the thickener operation, avoiding excessive vortex and re-suspension of the sediment, reducing additional energy consumption, and lowering the operating cost of the thickener. The smooth overflow of the slurry along the axis direction reduces the flow resistance, and the slurry enters the flow in a more controllable manner, which helps the solid particles to settle more quickly and uniformly, improving the sedimentation efficiency and solid recovery rate.

[0067] In this embodiment, the inclination can be increased or decreased according to the required overflow speed.

[0068] In one embodiment, please refer to Figure 1 and Figure 2 To reduce the waste of flocculating agent and ensure that the slurry reacts fully with the flocculating agent, a flocculating agent addition port 5 is provided at a position at least one quarter of the circle away from the feed inlet 101 on the top of the cylinder 1, and the discharge end of the flocculating agent addition port 5 faces the spiral dam 3. Since the slurry flow speed is fast at the feed inlet 101, the particle speed is fast, and it is not easy to form large particles under the action of the flocculating agent, which will waste a lot of flocculating agent. Therefore, the flocculating agent addition port 5 is provided at a position one quarter of the circle away, where the slurry flow speed is reduced, allowing better reaction with the flocculating agent.

[0069] To better understand the present application, the following will be combined with Figures 1 to 4The technical scheme of the utility model is described in detail: the single-channel thickening system is composed of the cylinder body 1, the spiral dam 3, the cloth plate 2 and the rake machine 4, the feed inlet 101 is arranged at the top of the cylinder body 1 in the tangent direction, under the spiral guidance of the spiral dam 3, vortex is formed, and the ore pulp is injected downwards in the form of overflow towards the center, so that the ore pulp enters the cylinder body 1 at a uniform speed and flow rate, and in cooperation with the cloth plate 2, the ore pulp is injected into the thickening tank body 6 of the thickener in a uniform distribution; the flocculating agent adding port 5 is arranged at the position of the top of the cylinder body 1 and the position away from the feed inlet 101 by a quarter of a circle distance, in cooperation with the ore pulp with reduced flow rate at the position, the flocculating agent can better react; the rake frame 42 and the scraper 43 are driven to rotate by the rotating shaft 41, so that the sediment is scraped off from the inner wall of the cylinder body 1 and the cloth plate 2, which not only avoids excessive accumulation of the sediment in the cylinder body 1, but also avoids that the sediment causes blockage of the discharge gap 201.

[0070] In a second aspect, the present aspect further provides a thickener, referring to Figure 5 The thickener comprises the single-channel thickening system in any one of the above embodiments.

[0071] It can be understood that the thickener comprises the thickening tank body 6, the bottom of the thickening tank body 6 is a conical surface 601, and the single-channel thickening system is arranged on the central axis of the thickening tank body 6 and is used for introducing the thickening of the ore pulp towards the inside of the lower tank body 6, wherein the driving mechanism of the rake machine 4 is arranged on the thickening tank body 6 and is used for driving the rotation of the rake machine 4, in addition, the tank rake frame 44 in contact with the inner bottom wall of the tank body 6 is also arranged on the rotating shaft 41 of the rake machine 4, and the tank rake frame 44 is used for dredging the ore pulp in the thickening tank body 6 to the ore discharging port 602.

[0072] Obviously, the above embodiments of the utility model are only examples for clearly illustrating the utility model, and are not the limitation of the embodiments of the utility model. For ordinary skilled persons in the art, various obvious changes, re-adjustments and substitutions can be made without departing from the protection scope of the utility model. Here, it is not necessary and impossible to enumerate all the embodiments. Any modification, equivalent substitution and improvement made within the spirit and principle of the utility model should be included in the protection scope of the utility model claims.

Claims

1. A single pass thickening system characterized by, The single-channel thickening system comprises: a cylinder (1), a feed inlet (101) being arranged at the top of the cylinder (1) in a tangential direction; a spiral dam (3) being arranged along the axis of the cylinder (1) in a spiral manner, the top end of the spiral dam (3) being connected with the feed inlet (101), and the spiral dam (3) being used for guiding the ore slurry vortex to overflow downwards along the axis of the cylinder (1); a distribution plate (2) being arranged at the bottom of the cylinder (1), the distribution plate (2) having a guide surface (203) arranged towards the cylinder (1), the height of the guide surface (203) gradually decreasing from the middle position of the guide surface (203) to the circumferential edge position of the guide surface (203), and the guide surface (203) having a discharge gap (201) with the bottom of the cylinder (1), the guide surface (203) being capable of guiding the ore slurry overflowing out of the spiral dam (3) to flow out at the discharge gap (201).

2. The single pass thickening system of claim 1, wherein, The single-channel thickening system further comprises a rake machine (4), and the rake machine (4) comprises: a rotating shaft (41) being arranged along the axis of the cylinder (1), the cylinder (1) being rotatably arranged on the rotating shaft (41), and the distribution plate (2) being rotatably arranged on the rotating shaft (41), the guide surface (203) being arranged along the circumference of the rotating shaft (41); a scraper (43) being attached to the guide surface (203) at the bottom, and the scraper (43) being connected to the rotating shaft (41), the rotating shaft (41) being capable of rotating the scraper (43) to push the sediment on the distribution plate (2) to flow out of the discharge gap (201).

3. The single-pass thickening system of claim 2, wherein, The rake machine (4) further comprises a rake frame (42) connected with the rotating shaft (41) and / or the scraper (43), and the surface of the rake frame (42) being attached to the inner wall of the cylinder (1), the rotating shaft (41) being capable of rotating the rake frame (42) to scrape the sediment on the inner wall of the cylinder (1).

4. The single-pass thickening system of claim 3, wherein, The rake frame (42) is connected with the scraper (43) to form a V-shaped structure, and the tip of the V-shaped structure is inserted into the discharge gap (201); and / or, The rake machine (4) further comprises a support rod, one end of the support rod being connected with the rake frame (42), and the other end of the support rod being connected with the scraper (43).

5. The single pass thickening system of claim 4, wherein, The bottom of the distribution plate (2) is fixedly connected with the cylinder (1) through an extension frame (202); The extension frame (202) is provided with one or more, and when multiple extension frames (202) are provided, the multiple extension frames (202) are arranged at intervals along the circumference of the distribution plate (2).

6. The single-pass thickening system of claim 5, wherein, The extension frame (202) comprises: a first connecting rod (202a) connected with the distribution plate (2); a second connecting rod (202b) connected with the cylinder (1). A transition rod (202c) is connected between the first connecting rod (202a) and the second connecting rod (202b) to form a containing groove, the transition rod (202c) can separate the second connecting rod (202b) from the edge of the cloth plate (2), and the containing groove can be used for the V-shaped structure part to extend into.

7. The single-pass thickening system of any one of claims 1-6, wherein, The spiral dam (3) spirals from the feed inlet (101) and spirals into a ring.

8. The single-pass thickening system of any one of claims 1-6, wherein, The inner edge of the spiral dam (3) has a flow blocking weir (301), and the flow blocking weir (301) is gradually lowered along the spiral direction of the spiral dam (3) and starts from the feed inlet (101).

9. The single-pass thickening system of any one of claims 1-6, wherein, The top of the barrel (1) is provided with a flocculating agent adding port (5) at a position at least one quarter of a circle away from the feed inlet (101), and the discharge end of the flocculating agent adding port (5) faces the spiral dam (3).

10. A thickener characterized by A single-pass thickening system comprising any one of claims 1-9.

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