Ore pulp thickening system
By adding a flocculant dosing device to the thickener, the slurry thickening system utilizes a combination of flocculant and screen pressing technology to solve the problems of long thickening time and low efficiency, achieving faster thickening and higher thickening efficiency.
Patent Information
- Application Number
- CN202423231319.3
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-12-26
- Publication Date
- 2025-12-05
- Estimated Expiration
- 2034-12-26
AI Technical Summary
Existing thickeners have long slurry concentration times and low concentration efficiency, relying mainly on gravity for concentration.
A slurry thickening system is used, in which flocculant is sprayed into the containment chamber through a flocculant dosing device, the screen plate is pressed down to push the particles to settle, and the sieve hole screening and scraping components are used to accelerate the particle settling.
It accelerates the settling and thickening speed of particulate matter, improves thickening efficiency, solves the problem of long slurry thickening time in existing equipment, and improves thickening efficiency.
Smart Images
Figure CN223628149U_ABST
Abstract
Description
TECHNICAL FIELD
[0001] The utility model relates to thickener technical field especially relates to ore pulp thickening system. BACKGROUND
[0002] Thickener is a kind of solid-liquid separation equipment based on gravity sedimentation, can be with solid weight 10%~20% ore pulp is concentrated to the solid content of 45%~55% underflow ore pulp by gravity sedimentation, then with the help of the rake installed in thickener slow running (1 / 3r / min~1 / 5r / min) bottom flow ore pulp is unloaded from the bottom flow port by thickening bottom flow.The upper part produces relatively clean supernatant (or overflow), by the annular chute at the top discharge.
[0003] In order to shorten the concentration time, improve concentration efficiency, the pressure mechanism is provided in part of the existing thickener, the through hole is formed in the pressure mechanism, when the pressure mechanism moves vertically, larger particles can be pressed to the bottom of the tapered accommodating cavity, small particles pass through the through hole and reach the upper side of the pressure mechanism, so as to accelerate the concentration of ore pulp.
[0004] The defects of the structure include: simply relying on the gravity of ore pulp for concentration, the concentration time is still long, and the concentration efficiency is low. CONTENT OF THE UTILITY MODEL
[0005] The utility model aims at providing ore pulp thickening system, solve the problem that the existing thickener simply relies on the gravity of ore pulp for concentration and leads to long concentration time, and the concentration efficiency is high.
[0006] To achieve this purpose, the utility model adopts the following technical scheme:
[0007] Ore pulp thickening system, including: thickener body, including a tapered accommodating cavity;Pressure mechanism, including lifting assembly and sieve plate, sieve hole is formed in the sieve plate, the movable end of lifting assembly is connected to the sieve plate, to drive the sieve plate moves, the sieve plate has the highest state of liquid level and reaches the lowest state in the middle or below the middle of the thickener body;And, flocculating agent feeding device, including the flocculating agent feeding pipeline arranged on the sieve plate, the flocculating agent feeding pipeline is provided with liquid injection hole, the liquid injection hole is used to spray flocculating agent in the accommodating cavity.
[0008] In one preferred embodiment, the accommodating cavity is provided with a flow stabilizing cylinder, and the axis of the flow stabilizing cylinder passes through the lowest point of the accommodating cavity;The thickener body further includes a feed pipe in communication with the flow stabilizing cylinder.
[0009] In one preferred embodiment, the sieve plate includes an inner sieve plate, the inner sieve plate is arranged in the flow stabilizing cylinder, and the inner sieve plate can move along the extension direction of the flow stabilizing cylinder under the drive of the lifting assembly.
[0010] In one preferred embodiment, the screen plate further comprises an outer screen plate in the shape of a ring, the flow straightener is arranged in the mounting through hole of the outer screen plate, and the outer screen plate is movable along the extension direction of the flow straightener under the driving of the lifting assembly.
[0011] In one preferred embodiment, a through gap is formed in the outer screen plate, the through gap is aligned with the feeding pipe along the extension direction of the flow straightener, and the width of the through gap is greater than or equal to the width of the feeding pipe.
[0012] In one preferred embodiment, the upper surface of the screen plate is at least partially conical.
[0013] In one preferred embodiment, the ore slurry thickening system further comprises a scraping assembly, the scraping assembly comprises a main shaft, a scraper and a driving mechanism, one end of the main shaft is connected to the output shaft of the driving mechanism, the output shaft can drive the main shaft to rotate about its own axis, and one end of the main shaft is connected to the scraper.
[0014] In one preferred embodiment, the ore slurry thickening system further comprises a platform, the bottom of the platform is higher than the highest position of the screen plate, and the driving mechanism is arranged on the platform.
[0015] In one preferred embodiment, the lifting assembly comprises at least two hoists arranged on the platform, and the movable end of the hoist is connected to the screen plate to drive the screen plate to move.
[0016] In one preferred embodiment, the flocculant feeding device further comprises a liquid supply pipe, the liquid supply pipe is connected between the flocculant feeding pipe and a flocculant storage tank, and the liquid supply pipe is fixed on the movable end of the hoist through a support.
[0017] The ore slurry thickening system disclosed by the utility model comprises a flocculant feeding device, a liquid spraying hole on the flocculant feeding pipe can spray flocculants into the containing cavity, and the flocculants can form particulate matters after fully contacting with particles in the ore slurry. The screen plate can push the particulate matters to sink during the process of being pressed down, accelerate the concentration of the particles, improve the concentration efficiency and solve the technical problems that the existing device only concentrates by the gravity of the ore slurry, resulting in long concentration time and low concentration efficiency. BRIEF DESCRIPTION OF DRAWINGS
[0018] Figure 1 is a structural schematic view when the screen plate of the ore slurry thickening system provided by the embodiment of the utility model is lifted above the liquid level;
[0019] Figure 2is the structural schematic view of the screen plate of the ore pulp thickening system provided by the embodiment of the utility model below liquid level;
[0020] Figure 3 is the structural schematic view of the inner screen plate, the outer screen plate and the flow stabilizing cylinder provided by the embodiment of the utility model;
[0021] Figure 4 is the second structural schematic view of the inner screen plate, the outer screen plate and the flow stabilizing cylinder provided by the embodiment of the utility model.
[0022] In the drawing,
[0023] 1, thickener body;2, pressing mechanism;3, scraping assembly;4, platform;21, lifting assembly;22, screen plate;31, main shaft;32, scraper;33, driving mechanism;101, containing cavity;102, flow stabilizing cylinder;103, feed pipe;201, screen hole;202, flocculating agent feeding pipe;203, liquid injection hole;204, liquid supply pipe;211, hoist;221, inner screen plate;222, outer screen plate;223, screen plate lifting ring;2221, mounting through hole;2222, passing gap. Specific embodiments
[0024] In order to make the above-mentioned purpose, features and advantages of the utility model more obvious and easy to understand, the specific embodiments of the utility model are described in detail below. In the following description, a lot of specific details are set forth in order to fully understand the utility model. However, the utility model can be implemented in many other ways different from those described herein, and those skilled in the art can make similar improvements without departing from the connotation of the utility model, so the utility model is not limited by the specific embodiments disclosed below.
[0025] In the description of the utility model, it should be understood that the orientation or positional relationship indicated by the terms "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential" and the like is based on the orientation or positional relationship shown in the drawings, and is only for the convenience of describing the utility model and simplifying the description, and does not indicate or imply that the devices or elements referred to must have a particular orientation, be constructed and operated in a particular orientation, therefore it cannot be understood as a limitation of the utility model.
[0026] In addition, the terms "first", "second", "third", etc. are used only for descriptive purposes and do not connote or imply any relative importance or any meaning other than that which is supplied by the description. Thus, a feature described as "first" can imply that there is at least one such feature, either explicitly or implicitly. In the description of the present application, the meaning of "a plurality of" is at least two, such as two, three, etc., unless otherwise explicitly and specifically defined.
[0027] In the present application, unless otherwise explicitly and specifically defined, the terms "mounting", "connecting", "connecting", "fixing" and the like should be understood in a broad sense, 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; it can be the internal communication of two elements or the interaction relationship between two elements, unless otherwise explicitly defined. For those skilled in the art, the specific meaning of the above terms in the present application can be understood according to the specific circumstances.
[0028] In the present application, unless otherwise explicitly and specifically defined, the first feature is "on" or "under" the second feature. The first and second features can be in direct contact, or the first and second features can be in indirect contact through an intermediate medium. Moreover, the first feature "above", "above" and "above" the second feature can be directly above or obliquely above the first feature, or only indicate 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 can be directly below or obliquely below the first feature, or only indicate that the horizontal height of the first feature is less than that of the second feature.
[0029] It should be noted that when an element is referred to as "fixed to" or "disposed on" another element, it can be directly on the other element or there can be a middle element. When an element is referred to as "connected to" another element, it can be directly connected to the other element or there can be a middle element. The terms "vertical", "horizontal", "up", "down", "left", "right" and similar expressions used herein are for illustrative purposes only and are not the only embodiment.
[0030] The present embodiment discloses a slurry thickening system, which can be used for, but not limited to, a laterite nickel ore hydrometallurgical process. The present embodiment is described by taking the application in the laterite nickel ore hydrometallurgical process as an example, but it can be understood that it is also applicable in other industrial production.
[0031] As Figures 1 to 4As shown, the thickening system of the ore pulp includes a thickener body 1, a pressing mechanism 2 and a flocculant feeding device, wherein the thickener body 1 includes a tapered accommodating cavity 101; the pressing mechanism 2 includes a lifting assembly 21 and a sieve plate 22, the sieve plate 22 is provided with sieve holes 201, and the movable end of the lifting assembly 21 is connected to the sieve plate 22 to drive the sieve plate 22 to move, the sieve plate 22 has a highest state above the liquid level and a lowest state reaching the middle or below of the thickener body 1; the flocculant feeding device includes a flocculant feeding pipeline 202 arranged on the sieve plate 22, and the flocculant feeding pipeline 202 is provided with liquid injection holes 203.
[0032] The liquid injection holes 203 are used for spraying the flocculant into the accommodating cavity 101, and the flocculant can react with the particles in the ore pulp after fully contacting with the particles to form particles with different sizes. The sieve plate 22 is pressed downward to push the particles to sink, accelerate the particle settling and thickening, improve the thickening efficiency, and solve the technical problems that the existing device only thickens by the gravity of the ore pulp, resulting in long thickening time and low thickening efficiency. The specific spraying direction of the liquid injection holes 203 is not limited, which can be upward spraying, downward spraying, side spraying and omnidirectional spraying, so that the particles can fully contact with the flocculant and the flocculation efficiency is improved.
[0033] The sieve plate 22 is provided with sieve holes 201, and during the process of pressing the sieve plate 22 downward, the smaller particles after flocculation and the particles that have not been flocculated can pass through the sieve holes 201 to reach above the sieve plate 22, and these smaller particles and the particles that have not been flocculated can continue to flocculate; the larger particles after flocculation cannot pass through the sieve holes 201, and thus are intercepted below the sieve plate 22. The sieve plate 22 is continuously pressed downward until the larger particles after flocculation are sent to the middle and lower part of the accommodating cavity 101, so that the particle settling is accelerated and the thickening speed is improved.
[0034] During the process of moving the sieve plate 22 upward, part of the smaller particles after flocculation and the particles that have not been flocculated can pass through the sieve holes 201 to reach below the sieve plate 22, and the remaining particles can flow from the top of the sieve plate 22 to the periphery of the sieve plate 22, and then fall from the edge of the sieve plate 22, so as to avoid being retained on the upper surface of the sieve plate 22.
[0035] In addition, the sieve plate 22 has a stirring effect on the ore pulp during the process of moving the sieve plate 22 upward and downward, the flocculant can be injected into the ore pulp in a covering manner, so as to promote the flocculant to fully contact with the fine particles in the ore pulp, improve the particle agglomeration, and the flocculation effect of the flocculant is better. The flocculant feeding pipeline 202 is arranged on the sieve plate 22, and the sieve plate 22 is usually located on the vertical extension line of the center of the accommodating cavity 101, so the liquid injection holes 203 can spray the flocculant to the middle of the accommodating cavity 101, the flocculant is uniformly dispersed in the accommodating cavity 101 under the stirring effect of the sieve plate 22, the particles fully contact with the flocculant, and the flocculation efficiency is higher.
[0036] On the basis of the above structure, the containing cavity 101 is provided with a cylindrical flow stabilizing cylinder 102, the axis of the flow stabilizing cylinder 102 passes through the lowest point of the containing cavity 101. The feed pipe 103 of the thickener body 1 is communicated to the flow stabilizing cylinder 102, the ore pulp is injected into the containing cavity 101 through the feed pipe 103 and the flow stabilizing cylinder 102, the flow stabilizing cylinder 102 helps to control the flow state of the pulp entering the containing cavity 101, ensures that the pulp can be uniformly distributed in the entire thickener bottom, thereby improving the sedimentation efficiency of the solid particles.
[0037] In order to match the setting of the flow stabilizing cylinder 102, the sieve plate 22 includes a circular inner sieve plate 221 and an annular outer sieve plate 222. The inner sieve plate 221 is arranged in the flow stabilizing cylinder 102, and the inner sieve plate 221 can move along the extension direction of the flow stabilizing cylinder 102 under the drive of the lifting assembly 21. The outer diameter of the inner sieve plate 221 is less than or equal to the inner diameter of the flow stabilizing cylinder 102, which does not hinder the up-down movement of the inner sieve plate 221. The arrangement of the inner sieve plate 221 can accelerate the sinking of flocculated particles in the ore pulp area inside the flow stabilizing cylinder 102, and improve the thickening efficiency.
[0038] The flow stabilizing cylinder 102 is arranged in the mounting through hole 2221 of the outer sieve plate 222, and the outer sieve plate 222 can move along the extension direction of the flow stabilizing cylinder 102 under the drive of the lifting assembly 21. The inner diameter of the mounting through hole 2221 is greater than or equal to the outer diameter of the flow stabilizing cylinder 102, which does not hinder the up-down movement of the outer sieve plate 222. The outer sieve plate 222 surrounds the outer periphery of the flow stabilizing cylinder 102, and the up-down movement of the outer sieve plate 222 expands the injection range of the flocculating agent, so that the flocculated particles in the area accelerate the sinking.
[0039] Of course, the flow stabilizing cylinder 102 can also not be arranged in the containing cavity 101, then the sieve plate 22 is a whole structure, covers a large area, avoids large particles from escaping from the gap between the inner sieve plate 221 and the outer sieve plate 222; has good overall strength, avoids deformation or even damage under the pressure of the sieve plate 22, reduces the processing difficulty, and prolongs the service life.
[0040] On the basis of the above structure, the outer sieve plate 222 is provided with a passing gap 2222. Along the extension direction of the flow stabilizing cylinder 102, the passing gap 2222 is aligned with the feed pipe 103, and the width of the passing gap 2222 is greater than or equal to the width of the feed pipe 103. In the process of the up-down movement of the outer sieve plate 222, the passing gap 2222 can avoid the interference between the outer sieve plate 222 and the feed pipe 103, and the use is safer.
[0041] The specific shape and number of the passing gap 2222 are not limited, which can be determined according to the shape and number of any "obstacle" such as the feed pipe 103 located on the moving route of the outer sieve plate 222, which does not hinder the up-down movement of the outer sieve plate 222.
[0042] The specific shape of the sieve plate 22 is not limited. In this embodiment, the upper surface of the sieve plate 22 is at least partially conical. That is, the middle of the upper surface of the sieve plate 22 is high and the edge is low. When the sieve plate 22 moves upward, the particles will flow rapidly from the middle of the sieve plate 22 to the edge with the fluid until the edge of the sieve plate 22 falls down, thus avoiding particles from being stuck on the upper surface of the sieve plate 22 when the sieve plate 22 rises to its highest state.
[0043] It is understandable that designing the upper surface of the sieve plate 22 as a flat surface is feasible, as particles located on the upper surface of the sieve plate 22 can also flow rapidly from the center to the edge. However, a conical upper surface can accelerate the flow rate, and the slurry can generate a greater impact force when flowing rapidly on the upper surface of the sieve plate 22, carrying away as many particles as possible and preventing particles from remaining on the upper surface of the sieve plate 22.
[0044] like Figure 1 and Figure 2 As shown, the slurry thickening system also includes a scraper assembly 3. The scraper assembly 3 includes a main shaft 31, a scraper 32 (or rake frame), and a drive mechanism 33. One end of the main shaft 31 is connected to the output shaft of the drive mechanism 33, and the output shaft can drive the main shaft 31 to rotate around its own axis. The other end of the main shaft 31 is connected to the scraper 32, and the main shaft 31 can drive the scraper 32 to rotate synchronously. The scraper 32 is in contact with the inner wall of the receiving cavity 101, and when the scraper 32 rotates with the main shaft 31, it can scrape off the slurry adhering to the inner wall of the receiving cavity 101.
[0045] When the flow stabilizer 102 is not provided and the screen plate 22 is an integral structure, the main shaft 31 can guide the integral screen plate 22 to rise and fall, making the screen plate 22 more stable when rising and falling; when the flow stabilizer 102 is provided, the main shaft 31 can guide the inner screen plate 221 to rise and fall.
[0046] When a flow stabilizer 102 is provided, the outward orientation of the outer screen plate 222 is not limited. When the edge of the opening 2221 of the outer screen plate 222 is basically in contact with the outer periphery of the flow stabilizer 102, and the flow stabilizer 102 is cylindrical, the flow stabilizer 102 can guide the outer screen plate 222 and improve the stability of the outer screen plate 222 when it moves.
[0047] Based on the above structure, the slurry thickening system also includes a platform 4. The bottom of the platform 4 is higher than the highest point of the screen plate 22, which avoids affecting the rise of the screen plate 22. The drive mechanism 33 is mounted on the platform 4, and the output shaft of the drive mechanism 33 is set downwards for easy connection to the main shaft 31. The drive mechanism 33 can be, but is not limited to, an electric motor and a reducer; the product is mature and its function is stable.
[0048] The specific structure of the lifting assembly 21 is not limited, and in the embodiment, the lifting assembly 21 comprises at least two hoists 211 arranged on the platform 4, and the movable end of the hoist 211 is connected to the sieve plate 22 to drive the sieve plate 22 to move up and down. In order to improve the stability of the sieve plate 22, all the hoists 211 are evenly and symmetrically distributed on the platform 4, so as to ensure that the sieve plate 22 is more balanced under force.
[0049] Specifically, the sieve plate 22 is provided with a sieve plate lifting ring 223, and the hoist 211 is connected to the sieve plate lifting ring 223 through a reel, a steel wire rope, a chain or the like. When the sieve plate 22 moves downward, it mainly relies on its own gravity, and the hoist 211 can avoid the sieve plate 22 from sinking too fast and control the sinking speed of the sieve plate 22. When the sieve plate 22 needs to move upward, all the hoists 211 act synchronously to make the sieve plate 22 move upward steadily at a set speed, and the spatial posture of the sieve plate 22 remains unchanged.
[0050] On the basis of the above structure, the flocculant feeding device further comprises a liquid supply pipe 204. One end of the liquid supply pipe 204 is connected to the flocculant feeding pipeline 202, and the other end of the liquid supply pipe 204 is connected to a flocculant storage tank. The flocculant in the flocculant storage tank can enter the flocculant feeding pipeline 202 through the liquid supply pipe 204. In order to improve the flow speed of the flocculant in the liquid supply pipe 204, the flocculant feeding device further comprises a pump body. The pump body can provide power to the flocculant in the liquid supply pipe 204 to improve the flow speed of the flocculant.
[0051] During the upward and downward movement of the sieve plate 22, the flocculant feeding pipeline 202 moves synchronously with the sieve plate 22. In order to avoid disconnection between the liquid supply pipe 204 and the flocculant feeding pipeline 202, the liquid supply pipe 204 is fixed on the movable end of the hoist 211 through a support. It is ensured that one end of the liquid supply pipe 204 can move synchronously with the sieve plate 22 during the movement of the sieve plate 22, and the connection between the liquid supply pipe 204 and the flocculant feeding pipeline 202 will not bear tension, so the liquid supply pipe 204 and the flocculant feeding pipeline 202 will not be disconnected.
[0052] Note that the above is only a preferred embodiment of the present application and the technical principle used. Those skilled in the art will understand that the present application is not limited to the specific embodiments described herein, and those skilled in the art can make various obvious changes, re-adjustments and substitutions without departing from the scope of the present application. Therefore, although the present application has been described in more detail through the above embodiments, the present application is not limited to the above embodiments, and can include more other equivalent embodiments without departing from the concept of the present application, and the scope of the present application is determined by the scope of the appended claims.
Claims
1. A thickener system for a mineral slurry, characterised in that, The application relates to a mineral slurry thickening system. The system comprises a thickener body (1) including a conical accommodating cavity (101); a pressing mechanism (2) including a lifting assembly (21) and a sieve plate (22), the sieve plate (22) being provided with sieve holes (201), and the movable end of the lifting assembly (21) being connected to the sieve plate (22) to drive the sieve plate (22) to move, the sieve plate (22) having a highest state above the liquid surface and a lowest state reaching the middle part or below the middle part of the thickener body (1); and a flocculant feeding device including a flocculant feeding pipeline (202) arranged on the sieve plate (22), the flocculant feeding pipeline (202) being provided with liquid injection holes (203) for spraying flocculants into the accommodating cavity (101). The accommodating cavity (101) is provided with a flow stabilizing cylinder (102), the axis of the flow stabilizing cylinder (102) passing through the lowest point of the accommodating cavity (101); and the thickener body (1) further comprises a feeding pipeline (103) in communication with the flow stabilizing cylinder (102). The sieve plate (22) comprises an inner sieve plate (221) arranged in the flow stabilizing cylinder (102), and the inner sieve plate (221) can move along the extension direction of the flow stabilizing cylinder (102) under the drive of the lifting assembly (21).
2. The concentrate system of claim 1, wherein, The sieve plate (22) further comprises an annular outer sieve plate (222), the flow stabilizing cylinder (102) being arranged in the mounting through hole (2221) of the outer sieve plate (222), and the outer sieve plate (222) can move along the extension direction of the flow stabilizing cylinder (102) under the drive of the lifting assembly (21).
3. The concentrate system of claim 2, wherein, The outer sieve plate (222) is provided with a passing gap (2222) along the extension direction of the flow stabilizing cylinder (102), the passing gap (2222) being aligned with the feeding pipeline (103), and the width of the passing gap (2222) is greater than or equal to the width of the feeding pipeline (103).
4. The concentrate system of claim 3, wherein, The upper surface of the sieve plate (22) is at least partially conical.
5. The concentrate system of claim 4, wherein, The mineral slurry thickening system further comprises a scraping assembly (3) including a main shaft (31), a scraper (32) and a driving mechanism (33), one end of the main shaft (31) being connected to the output shaft of the driving mechanism (33), the output shaft being capable of driving the main shaft (31) to rotate about its own axis, and one end of the main shaft (31) being connected to the scraper (32), so that the main shaft (31) can drive the scraper (32) to rotate synchronously to scrape the slurry adhered to the inner wall of the accommodating cavity (101).
6. The concentrate system of any one of claims 1 to 5, wherein, The mineral slurry thickening system further comprises a platform (4), the bottom of the platform (4) being higher than the highest position of the sieve plate (22), and the driving mechanism (33) is arranged on the platform (4).
7. The concentrate system of any one of claims 1 to 5, wherein, The lifting assembly (21) comprises at least two hoists (211) arranged on the platform (4), and the movable end of the hoist (211) is connected to the sieve plate (22) to drive the sieve plate (22) to move.
8. The concentrate system of claim 7, wherein, 9. The concentrate system of claim 8, wherein, 10. The concentrate system of claim 9, wherein, The flocculant feeding device further comprises a liquid supply pipe (204) connected between the flocculant feeding pipe (202) and a flocculant storage tank, and the liquid supply pipe (204) is fixed on the movable end of the hoist (211) by a support.