A concentrate recovery device

Abstract

The present invention discloses a concentrate recovery device, including a concentration tank, a feeding mechanism, and the feeding mechanism is fixed in the concentration tank. An overflow port is provided at the top of the concentration tank, and a discharge port is provided at the bottom. The feeding mechanism includes a feeding fixed pipe, a flow stabilizing cylinder sleeved on the outside of the feeding fixed pipe, and the feeding fixed pipe is a cavity with a top or / and side opening, and the opening is the access point of the feeding pipe. A plurality of discharge holes penetrating the outside are provided at the bottom of the cavity, and the flow stabilizing cylinder and the feeding fixed pipe are arranged at intervals, and the discharge hole is placed in the turbid layer of the slurry in the concentration tank. The beneficial effects of the present invention are as follows: by installing the discharge hole in the turbid layer, the feeding point can be lowered to avoid making the clear water layer turbid. Through the flow blocking effect of the flow stabilizing cylinder, the slurry at the discharge hole encounters the flow stabilizing cylinder, the speed is reduced, and the flow direction is also changed, which reduces the impact force of the feeding, improves the feeding effect, increases the sedimentation speed of the entire sedimentation process, and improves the recovery rate.

Description

Technical Field

[0001] The invention relates to a recovery device, in particular to a concentrate recovery device. Background Art

[0002] The washing water produced in the ore washing process still contains some metal particles. Therefore, it is mostly recycled to avoid loss. After solid-liquid separation, the washing water is used to obtain a filter cake. The filter cake is taken out, dried, crushed, weighed and mixed with water to form a slurry of a certain concentration, and then settled for recycling. For recyclables, physical sedimentation or chemical sedimentation is usually used in the prior art. Chemical sedimentation usually requires the use of chemical reagents, which is not environmentally friendly. Therefore, physical sedimentation is more preferred. However, in the existing physical sedimentation method, a concentrator is usually used for sedimentation. The concentrator is a concentrating chamber with a certain volume. A truss is provided on the top of the compressor, and a driving device is provided on the truss. The driving device can drive the driving rod to rotate. A scraping mechanism is provided at the bottom of the driving rod. The slurry is injected into the cavity for sedimentation. After sedimentation for a period of time, it is divided into a clear water layer, a turbid layer, and a sedimentation layer from top to bottom. During the sedimentation process, the height of the clear water layer, the turbid layer, and the sedimentation layer will change. An overflow port and a feed point are provided at the top of the concentration tank. Under normal circumstances, the clear water layer is a clarified liquid, mostly small particles, which will overflow from the overflow port, the turbid layer is a layer that is settling, mostly medium particles, and the sedimentation layer is a layer that has completed sedimentation, mostly large particles.

[0003] For example, the application number is 201510608360.4, a method for recovering tantalum-niobium concentrate from tantalum-niobium waste ore, using tantalum-niobium waste ore as raw material, removing strong magnetic mechanical iron substances through crushing, grinding, screening, spiral classifier and permanent magnet, and then enriching weak magnetic tantalum-niobium iron minerals with high gradient magnetic separator, and then sorting with spiral chute to obtain high-grade tantalum-niobium crude ore, which is characterized by also including the following methods: 1) shaking table sorting, the high-grade tantalum-niobium crude ore is sorted by remote bed, and a dispersant is added to adjust, and the pulp is obtained by filter pressing, 2) activation sorting, the pulp is put into the cloth ditch and an activator is added to sort out part of the tantalum-niobium concentrate and pulp, 3) high gradient magnetic separation, the pulp is finely sorted by a high gradient magnetic separator and a flocculant is added to obtain tantalum-niobium concentrate. Sedimentation is carried out by flocculants, which is not environmentally friendly.

[0004] Moreover, during the physical sedimentation process, the feeding structure is often not reasonable. Usually, the feeding pipe is directly connected to the upper middle or edge of the thickening tank for feeding. During the feeding process, the slurry flow rate in the feeding pipe is relatively large and directly rushes into the clear water layer, causing the already clarified water to become turbid again, resulting in a turbid state for a longer period of time. The sedimentation process is interrupted, prolonging the sedimentation time. A large number of particles that have not been settled in the clear water layer will flow out from the overflow port, causing losses.

[0005] As a result, the particles collected in the actual recycling process often do not even reach 200 mesh.

[0006] The information disclosed in this background technology section is only intended to enhance the understanding of the overall background of the invention and should not be regarded as an acknowledgment or any form of suggestion that the information constitutes the prior art already known to a person skilled in the art. Summary of the invention

[0007] The technical problem to be solved by the present invention is: how to solve the problem of poor recycling effect caused by unreasonable feeding structure.

[0008] The present invention solves the above technical problems through the following technical means:

[0009] A concentrate recovery device comprises a concentrating tank, a feeding mechanism, and the feeding mechanism is fixed in the concentrating tank. An overflow port is arranged at the top of the concentrating tank, and a discharge port is arranged at the bottom. The feeding mechanism comprises a feeding fixed pipe and a flow stabilizing cylinder sleeved on the outside of the feeding fixed pipe. The feeding fixed pipe is a cavity with a top and / or side opening, and the opening is the access point of the feeding pipe. A plurality of discharge holes penetrating the outside are arranged at the bottom of the cavity. The flow stabilizing cylinder and the feeding fixed pipe are arranged at intervals, and the discharge hole is placed in the turbid layer of the ore pulp in the concentrating tank.

[0010] The present invention connects a feed pipe to the top of a feed fixed pipe, and then the slurry flows into the cavity and flows out from a discharge hole. There are multiple discharge holes, which can realize diffusion-type feed in all directions, thereby reducing the impact force of a stream of feed. Furthermore, through the flow-blocking effect of the flow-stabilizing cylinder, the slurry at the discharge hole encounters the flow-stabilizing cylinder, and its speed decreases, and its flow direction is also changed, thereby further reducing the impact force of the feed. When the slurry flows out, large particles in the turbid layer fall, which will impact small particles in the new slurry to fall, so that the small particles can be recovered. The stabilizing feed device is installed inside the concentrator. Usually, the discharge hole is installed in the turbid layer, and the feed point can be lowered, thereby preventing the slurry from entering the clear water layer and making the clear water layer turbid, and preventing the settled slurry from being disturbed again. Therefore, the feed effect is improved, the sedimentation speed of the entire sedimentation process is improved, and the recovery rate is improved.

[0011] Preferably, the feed solid pipe is a tubular structure made of cement, the bottom of the feed solid pipe is fixed to the bottom of the inside of the concentration tank, and the part below the discharge hole of the feed solid pipe is a solid structure.

[0012] The cement column has a stable structure and is environmentally friendly.

[0013] Preferably, it also includes a scraping mechanism, which is installed on the feed solid pipe and can rotate around the feed solid pipe. The scraping mechanism includes a bracket and a plurality of scraping plates, and the scraping plates are installed below the bracket.

[0014] The scraper structure can concentrate the slurry in the sedimentation layer to the discharge port, making it easier to discharge.

[0015] Preferably, if the top of the feed solid pipe is open, the opening is higher than the top of the concentrator, and the feed pipe is connected to the top of the feed solid pipe; if the side of the feed solid pipe is open, the feed pipe passes through the concentrator wall from the outside of the concentrator and is connected to the opening.

[0016] You can choose to feed from the top or side according to the situation. It is flexible to use. When feeding, the feed pipe can be fixed on the truss.

[0017] Preferably, the bottom end of the flow stabilizing tube is lower than the discharge hole.

[0018] Preferably, the discharge hole is arranged horizontally or inclined downward.

[0019] Preferably, the discharge holes are evenly arranged.

[0020] Preferably, the vertical height of the discharge hole from the concentrator tank to the overflow port is 1 / 4-1 / 2 of the vertical height of the lowest point in the concentrator tank to the overflow port.

[0021] Preferably, it also includes a flow guiding mechanism, which is fixed on the feed fixed pipe and is located below the flow stabilizing cylinder.

[0022] Preferably, the cross-section of the flow-guiding mechanism is a trapezoidal truncated cone-shaped structure and / or a trumpet-shaped structure, the interior of which is hollow or solid, and the end close to the flow-stabilizing cylinder is the end with a smaller diameter.

[0023] The flow direction of the slurry is changed by the flow stabilizing tube, and the flow direction is mostly downward, which still produces a certain impact. The guide mechanism can change the flow velocity and direction of the slurry impacting the flow stabilizing tube again, so that the flow direction of the slurry is changed to a roughly horizontal direction, and enters the turbid layer in a more gentle manner.

[0024] The surface of the diversion device is the surface of the device, and therefore, it is not limited to its internal structure. The tangent direction at the edge of the arc can be horizontal, so that the slurry can enter horizontally and reduce the impact.

[0025] The advantages of the present invention are:

[0026] (1) The present invention connects the feed pipe to the top of the feed fixed pipe, and then the slurry flows into the cavity and flows out from the discharge hole. There are multiple discharge holes, which can realize the diffusion-type feed in all directions, reducing the impact force of a stream of feed. Moreover, through the flow resistance of the flow stabilizing cylinder, the slurry at the discharge hole encounters the flow stabilizing cylinder, the speed decreases, and the flow direction is also changed, which further reduces the impact force of the feed. When the slurry flows out, the large particles in the turbid layer fall, which will impact the small particles in the new slurry to fall, so that the small particles can be recovered; and the stabilizing feed device is installed inside the concentrator. Usually, the discharge hole is installed in the turbid layer, and the feed point can be lowered, which prevents the slurry from entering the clear water layer and making the clear water layer turbid, and does not disrupt the settled slurry again. Therefore, the feed effect is improved, the sedimentation speed of the entire sedimentation process is increased, and the recovery rate is improved;

[0027] (2) The cement column structure is stable and environmentally friendly;

[0028] (3) The scraper structure can concentrate the slurry in the sedimentation layer at the discharge port, making it easier to discharge;

[0029] (4) You can choose to feed from the top or side according to the situation. It is flexible to use. When feeding, the feeding pipe can be fixed on the truss;

[0030] (5) The bottom end of the flow stabilizing cylinder is lower than the discharge hole, so as to ensure that the slurry discharged from the discharge hole can be sprayed onto the flow stabilizing cylinder to obtain a deceleration effect;

[0031] (6) The discharge holes are evenly arranged to ensure uniform discharge, and the sedimentation rate at each location is roughly the same, ensuring the sedimentation effect and ensuring the sedimentation rate;

[0032] (7) The flow direction of the slurry is changed by the flow stabilizing cylinder. The flow direction is mostly downward, which still produces a certain impact. The diversion mechanism can change the flow velocity and direction of the slurry that impacts the flow stabilizing cylinder again, so that the flow direction of the slurry is changed to a roughly horizontal direction, and enters the turbid layer in a more gentle manner. The surface of the diversion is its surface. Therefore, it is not limited to its internal structure. The tangent direction at the edge of the arc can be horizontal, so that the slurry enters horizontally and reduces the impact.

[0033] (8) Capable of recovering particles below 400 mesh; BRIEF DESCRIPTION OF THE DRAWINGS

[0034] Figure 1 This is a schematic diagram of the structure of a concentrate recovery device according to an embodiment of the present invention.

[0035] Figure 2 A schematic diagram of the structure of the feeding mechanism in the first embodiment;

[0036] Figure 3 yes Figure 2AA cross-sectional view;

[0037] Figure 4 It is a structural schematic diagram of the feeding mechanism in the second embodiment;

[0038] Figure 5 is a schematic structural diagram of a recovery device using the feeding mechanism in Example 2;

[0039] Figure 6 It is a structural schematic diagram of the feeding mechanism in the third embodiment;

[0040] Figure 7 This is a schematic diagram of the structure of the feeding mechanism in the fourth embodiment:

[0041] Figure 8 is a structural schematic diagram of the feeding mechanism in the fifth embodiment;

[0042] Fig. 9 is a schematic structural diagram of the feeding mechanism in the sixth embodiment;

[0043] Fig.10 It is a structural schematic diagram of the feeding mechanism in the seventh embodiment.

[0044] Reference numerals in the figure: feed solid pipe 1, cavity 11, discharge hole 12, flow stabilizing tube 2, flow guiding mechanism 3, feed pipe 4, concentration tank 5, truss 51, scraping mechanism 6, bracket 61, scraping plate 62. DETAILED DESCRIPTION

[0045] In order to make the purpose, technical solution and advantages of the embodiments of the present invention clearer, the technical solution in the embodiments of the present invention will be clearly and completely described below in combination with the embodiments of the present invention. Obviously, the described embodiments are part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0046] Embodiment 1:

[0047] like Figure 1 As shown, a concentrate recovery device includes a concentrating tank 5, a feeding mechanism, and the feeding mechanism is fixed in the concentrating tank 5. The concentrating tank 5 is provided with an overflow port at the top and a discharge port at the bottom. The feeding mechanism includes a feeding solid pipe 1, a flow stabilizing tube 2 sleeved on the outside of the feeding solid pipe 1, and a flow guiding mechanism 3. The feeding solid pipe 1 is provided with a cavity 11 with an opening at the top, and the opening is the access point of the feeding pipe 4. A plurality of discharge holes 12 penetrating the outside are provided at the bottom of the cavity. The flow stabilizing tube 2 and the feeding solid pipe 1 are spaced apart. The flow guiding mechanism 3 is fixed on the feeding solid pipe 1 and is located below the flow stabilizing tube 2. The discharge hole is placed in the turbid layer of the slurry in the concentrating tank.

[0048] In this embodiment, the feed solid pipe 1 is a tubular structure made of cement, the bottom of the feed solid pipe is fixed to the bottom of the inside of the concentration tank 5, the top is higher than the overflow port, and the part below the discharge hole 12 of the feed solid pipe 1 is a solid structure, so that all the feed is carried out through the feed hole 12. The cement column structure is stable and environmentally friendly.

[0049] The present embodiment also includes a scraper mechanism 6, which can be installed on the feed solid pipe 1 and can rotate around the feed solid pipe. Specifically, the scraper mechanism 6 includes a bracket 61 and a plurality of scraper plates 62, and the scraper plates 62 are suspended below the bracket 61 and can move up and down. Specifically, one end of the bracket 61 is connected to the feed solid pipe 1 through a bearing, and the other end of the bracket can be driven by a four-link drive, a crank slider drive, etc. to realize the circumferential rotation of the bracket around the central cement column, or other mechanisms that can realize the circular motion of the bracket; the up and down movement of the scraper plate can be realized by gear rack meshing, screw nut, etc., or other mechanisms or methods that can realize up and down movement in the prior art can be applied here. The scraper structure 6 can concentrate the slurry in the sedimentation layer at the discharge port to facilitate discharge.

[0050] The feed pipe 1 is a cylindrical structure, and the internal cavity is a circular hole, the diameter of which is equal to or slightly larger than the diameter of the feed pipe 4. In actual use, cement casting can be used, and the cement performance is stable;

[0051] The top of the feed solid pipe 1 is open, and the opening is higher than the top of the concentrator. The feed pipe 4 is connected to the top of the feed solid pipe 1 .

[0052] like Figure 2 , Figure 3 As shown, the flow stabilizing tube 2 is a cylindrical structure, whose inner diameter is larger than the outer diameter of the feed pipe 1, and the bottom end of the flow stabilizing tube 2 is lower than the discharge hole. The top end of the flow stabilizing tube 2 can be a closed structure or an open structure, and can be hoisted on the truss in a fixed manner.

[0053] The discharge hole 12 is arranged horizontally or tilted downward to ensure that the slurry discharged from the discharge hole 12 can be sprayed onto the flow stabilizing tube 2 to achieve the effects of deceleration and change of flow direction.

[0054] The discharge holes 12 are evenly arranged to ensure that the discharge is even and the settling speed at each location is roughly the same.

[0055] It should be noted that the position of the discharge hole 12 is in the turbid layer. Since each layer changes during the sedimentation process, those skilled in the art can make a reasonable and adaptive design according to the volume of the concentration tank and the concentration of the slurry.

[0056] Such as the following experiment:

[0057] The raw material is the ore pulp (filter cake) from the fine processing plant: the pulping concentration is 8-10%; the target concentration after sedimentation is ≥15%; no reagents are added during the sedimentation process;

[0058] Experimental process: ① Take out the filter cake, dry it, crush it, weigh it and add water to make 8% and 10% slurry for later use;

[0059] ②Put the well-proportioned slurry into a 500ml glass measuring cylinder;

[0060] ③ Use a stopwatch to time the descent position every 15 minutes until the target concentration is ≥15%.

[0061] Finally, we get Table 1:

[0062]

[0063] It can be seen that the height of the discharge hole should be approximately above 1 / 3 of the overall height, preferably 1 / 2 of the overall height, so as to achieve a better feeding effect.

[0064] In this embodiment, there are 6 discharge holes 12. The discharge holes 12 can be round or square.

[0065] The present invention connects the feed pipe 4 to the top of the feed fixed pipe 1, and then the slurry flows into the cavity and flows out from the discharge hole 12. There are multiple discharge holes 12, which can realize the diffusion-type feed in all directions, reducing the impact force of a stream of feed. Moreover, through the flow resistance effect of the flow stabilizing tube 2, the slurry flowing out of the discharge hole 12 decreases in speed after encountering the flow stabilizing tube 2, and the flow direction is also changed, which further reduces the impact force of the feed. When the slurry flows out, the large particles in the turbid layer fall, which will impact the small particles in the new slurry to fall, so that the small particles can be recovered; and the stabilizing feed device is installed inside the concentrator. Usually, the discharge hole 12 is installed in the turbid layer, and the feed point can be lowered, which avoids the slurry from entering the clear water layer and making the clear water layer turbid, and will not disrupt the settled slurry again. Therefore, the feeding effect is improved, the sedimentation speed of the entire sedimentation process is increased, the loss caused by the medium particles entering the clear water layer is reduced, and the recovery rate is improved.

[0066] Embodiment 2:

[0067] like Figure 4 , Figure 5 As shown, the difference between the second embodiment and the first embodiment is that it further includes a flow guiding mechanism 3 .

[0068] In this embodiment, the flow guide mechanism 3 is a truncated cone structure, which is hollow or solid inside, not limited to the internal structure, and its active surface is the inclined surface of the surface, and the end close to the flow stabilizer 2 is the end with a smaller diameter.

[0069] The flow direction of the slurry is changed by the flow stabilizing tube 2, and the flow direction is mostly downward, which still produces a certain impact. The flow guiding mechanism 3 can change the flow velocity and direction of the slurry impacting the flow stabilizing tube 2 again, so that the flow direction of the slurry is changed to a roughly horizontal direction, and enters the turbid layer in a more gentle manner.

[0070] Embodiment three:

[0071] like Figure 6 As shown, the difference between the third embodiment and the second embodiment is that the feed inlet is set at a different position.

[0072] The feed solid pipe 1 has an opening on the side, and the feed pipe 4 passes through the wall of the concentrator from the outside of the concentrator and is connected to the opening.

[0073] When feeding, the feeding pipe 4 can be fixed on the truss.

[0074] Embodiment 4:

[0075] like Figure 7 As shown, the difference between the fourth embodiment and the second embodiment is that the shape of the flow guide mechanism is different.

[0076] The flow guiding mechanism 3 is a trumpet-shaped structure with an arc-shaped outer surface, a hollow or solid interior, and an end close to the flow stabilizing tube is an end with a small diameter.

[0077] The surface of the diversion device is the surface of the device, and therefore, it is not limited to its internal structure. The tangent direction at the edge of the arc can be horizontal, so that the slurry can enter horizontally and reduce the impact.

[0078] Embodiment five:

[0079] like Figure 8 As shown, the difference between the fifth embodiment and the fourth embodiment is that the feed inlet is set at a different position.

[0080] The feed solid pipe 1 has an opening on the side, and the feed pipe 4 passes through the wall of the concentrator from the outside of the concentrator and is connected to the opening.

[0081] At this time, the flow guiding mechanism 3 is a trumpet-shaped structure with an arc-shaped outer surface.

[0082] Embodiment six:

[0083] like Fig. 9 As shown, the difference between the sixth embodiment and the second embodiment is that the shape of the flow guide mechanism is different.

[0084] The cross section of the flow guide mechanism 3 is a variable cross section structure, the upper part of which is a truncated cone structure, the outer surface of the lower part of which is an arc-shaped trumpet-shaped structure, the interior is hollow or solid, and the end close to the flow stabilizer is the end with a small diameter.

[0085] Embodiment seven:

[0086] like Fig.10 As shown, the difference between the seventh embodiment and the first embodiment is that the arrangement of the feed pipe 1 is different, and the arrangement of the scraping mechanism 6 is different.

[0087] A truss 51 is provided on the top of the concentration tank 5, and a driving device is installed on the truss 51. The top of the feed solid pipe 1 can rotate under the drive of the driving device, and the scraper mechanism 6 is fixedly installed on the bottom of the feed solid pipe 1. At this time, the feed solid pipe 1 is equivalent to the driving rod of the scraper mechanism 6. The upper part of the feed solid pipe 1 is hollow and the lower part is solid. The flow stabilizer 2 is sleeved on the outside of the driving rod, and they can be connected by a bearing or directly fixedly connected. When the bearing is connected, when the driving rod rotates, the flow stabilizer 2 does not rotate. When fixedly connected, the two rotate together.

[0088] The scraper mechanism 6 includes a bracket 61 and a plurality of scrapers 62. The bracket 61 is fixed to the middle and lower part of the feed pipe 1 and can be driven to rotate by a driving device. The plurality of scrapers 62 are mounted on the bracket 61. The bottom of the concentrating tank 5 is an inclined structure. The angle between the scraper 62 and the generatrix of the inclined surface is 8-10°. When the scraper is rotated, the slurry can be concentrated to the center to facilitate aggregation.

[0089] Of course, it also includes a flow guiding mechanism 3, which can be any one of the flow guiding mechanisms in the second, fourth and sixth embodiments.

[0090] The above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit the same. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that the technical solutions described in the aforementioned embodiments may still be modified, or some of the technical features may be replaced by equivalents. However, these modifications or replacements do not deviate the essence of the corresponding technical solutions from the spirit and scope of the technical solutions of the embodiments of the present invention.

Claims

1. A concentrate recovery device, characterized in that: The invention comprises a concentration tank, a feeding mechanism, the feeding mechanism is fixed in the concentration tank, an overflow port is arranged at the top of the concentration tank, and a discharge port is arranged at the bottom, the feeding mechanism comprises a feeding fixed pipe, and a flow stabilizing cylinder sleeved on the outside of the feeding fixed pipe, the feeding fixed pipe is a cavity with a top or / and side opening, the opening is the feeding pipe access point, a plurality of discharge holes penetrating the outside are arranged at the bottom of the cavity, the flow stabilizing cylinder and the feeding fixed pipe are arranged at intervals, and the discharge holes are placed in the turbid layer of the slurry in the concentration tank; and the invention also comprises a flow guiding mechanism, the flow guiding mechanism is fixed on the feeding fixed pipe and is located under the flow stabilizing cylinder. The cross section of the flow guide mechanism is a trapezoidal truncated cone structure and / or a trumpet structure, the interior is hollow or solid, and the end close to the flow stabilizing cylinder is the end with a small diameter; the feed solid pipe is a tubular structure made of cement, the bottom of the feed solid pipe is fixed to the bottom of the inside of the concentrator, and the part below the discharge hole of the feed solid pipe is a solid structure; if the top of the feed solid pipe is open, the opening is higher than the top of the concentrator, and the feed pipe is connected to the top of the feed solid pipe; if the side of the feed solid pipe is open, the feed pipe passes through the wall of the concentrator from the outside of the concentrator and is connected to the opening.

2. A concentrate recovery device according to claim 1, characterized in that: It also includes a scraping mechanism, which can be installed on the feed solid pipe and can rotate around it. The scraping mechanism includes a bracket and a plurality of scraping plates, and the scraping plates are installed below the bracket.

3. A concentrate recovery device according to claim 1, characterized in that: The bottom end of the flow stabilizing tube is lower than the discharge hole.

4. A concentrate recovery device according to claim 1, characterized in that: The discharge hole is arranged horizontally or inclined downward.

5. A concentrate recovery device according to claim 1, characterized in that: The discharge holes are evenly arranged.

6. A concentrate recovery device according to claim 1, characterized in that: The vertical height of the discharge hole from the concentrator tank to the overflow port is 1 / 4-1 / 2 of the vertical height of the lowest point in the concentrator tank to the overflow port.

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