Enhanced thickening mechanism for CCD countercurrent washing

Abstract

The intensified thickening mechanism comprises a cylinder and a stirring mechanism, a flocculant adding pipeline is arranged on the upper portion of the cylinder, the top of the cylinder is open and used for allowing supernate to overflow into the cylinder, a through hole is formed in the middle of the cylinder, and the stirring mechanism is arranged in the through hole. The through hole is used for allowing turbid liquid to enter the cylinder through the through hole; the stirring mechanism is arranged on the inner side of the cylinder and used for stirring liquid in the cylinder, and the stirring end of the stirring mechanism is arranged on the lower middle portion of the cylinder. According to the intensified thickening mechanism for CCD countercurrent washing, supernate overflows into the cylinder, turbid liquid enters the cylinder through the through hole in the middle of the cylinder, meanwhile, a flocculating agent is added into the cylinder, mixed flocculation of the supernate, the turbid liquid and the flocculating agent is achieved under the stirring effect, the flocculating settling effect is improved, and the concentration effect is improved. And the turbid degree of the output supernatant is lower.

Description

Technical Field

[0001] The present application relates to the technical field of CCD countercurrent washing, and in particular to an enhanced thickening mechanism for CCD countercurrent washing. Background Art

[0002] CCD countercurrent washing in laterite nickel ore hydrometallurgy is a commonly used solid-liquid separation technology. This technology uses a continuous fluid to countercurrently wash the material, utilizing the difference in specific gravity of the solid phase during the solid-liquid separation process and the impact force of the washing liquid on the material to separate the solid phase and improve the washing efficiency and recovery rate.

[0003] In the existing CCD countercurrent washing process of laterite nickel ore hydrometallurgy, the flocculation and thickening effect of the first-stage countercurrent washing and thickening machine is poor. This is mainly because the slurry temperature in the first-stage countercurrent washing and thickening machine is high, which causes violent movement of water molecules, thereby driving the leaching residue particles to diffuse into the supernatant, causing the supernatant to become turbid, affecting the flocculation and sedimentation effect. Summary of the Invention

[0004] The purpose of this application is to overcome the above-mentioned technical deficiencies and propose an enhanced thickening mechanism for CCD countercurrent washing to solve the technical problem in the prior art that due to the high temperature of the slurry in the thickener, the leached residue particles diffuse into the supernatant, making the supernatant turbid and affecting the flocculation and sedimentation effect.

[0005] In order to achieve the above technical objectives, this application adopts the following technical solutions:

[0006] The present application provides an enhanced thickening mechanism for CCD countercurrent washing, comprising:

[0007] A cylinder, wherein a flocculant addition pipe is provided at the upper portion of the cylinder, the top of the cylinder is open for allowing the supernatant to overflow into the cylinder, and a through hole is provided in the middle portion of the cylinder for allowing the turbid liquid to enter the cylinder through the through hole; and

[0008] The stirring mechanism is arranged inside the cylinder and is used for stirring the liquid in the cylinder. The stirring end of the stirring mechanism is arranged at the middle and lower part of the cylinder.

[0009] In some embodiments, the stirring mechanism includes a motor, a stirring shaft and a stirring impeller. The stirring shaft is connected to the drive shaft of the motor and is located on the central axis of the cylinder. The stirring impeller is installed on the stirring shaft and is located in the middle and lower part of the cylinder.

[0010] In some embodiments, the cylinder is trumpet-shaped with the stirring end of the stirring mechanism as the dividing line.

[0011] In some embodiments, a hole is opened on the upper portion of the cylinder for allowing the supernatant to flow in.

[0012] In some embodiments, there are multiple holes, and the holes are arranged in multiple layers from top to bottom.

[0013] In some embodiments, the number of the through hole is at least one.

[0014] In some embodiments, a diluent pipe is further provided on the upper portion of the cylinder for introducing the overflow supernatant from the next-stage countercurrent washing and thickening machine into the cylinder.

[0015] In some embodiments, a plurality of branch pipes are provided at the end of the diluent pipe, and the plurality of branch pipes are arranged circumferentially on the upper portion of the cylinder.

[0016] In some embodiments, there are multiple flocculant addition pipes, and the multiple flocculant addition pipes are arranged circumferentially on the upper part of the cylinder.

[0017] In some embodiments, a distributor is provided below the cylinder. The distributor is in the shape of a cone umbrella, and there is a gap between the lower edge of the distributor and the bottom of the cylinder.

[0018] Compared with the existing technology, the enhanced thickening mechanism for CCD countercurrent washing provided in this application allows the supernatant to overflow into the cylinder, and the turbid liquid to enter the cylinder through the through hole in the middle of the cylinder. At the same time, flocculant is added into the cylinder, and the supernatant, turbid liquid and flocculant are mixed and flocculated under the action of stirring, so that the turbid liquid in the middle can be treated, the flocculation and sedimentation effect can be improved, and the turbidity of the output supernatant can be reduced. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 This is a schematic structural diagram of an enhanced thickening mechanism for CCD countercurrent washing provided in one embodiment of the present application;

[0020] Figure 2 This is a schematic structural diagram of an enhanced thickening mechanism for CCD countercurrent washing provided in one embodiment of the present application;

[0021] Figure 3 This is a schematic structural diagram of an enhanced thickening mechanism for CCD countercurrent washing provided by another embodiment of the present application;

[0022] Figure 4 is a three-dimensional diagram of a straight cylinder provided in one embodiment of the present application;

[0023] Figure 5 This is a three-dimensional diagram of upper and lower trumpet-shaped cylinders provided in another embodiment of the present application.

[0024] Description of reference numerals:

[0025] 1. Cylinder; 101. Flocculant addition pipe; 102. Through hole; 103. Hole; 104. Dilution pipe; 1041. Branch pipe;

[0026] 2. Stirring mechanism; 21. Motor; 22. Stirring shaft; 23. Stirring impeller;

[0027] 3. Distributor; 4. Liquid level; 5. Supernatant liquid layer; 6. Turbid liquid layer. DETAILED DESCRIPTION

[0028] In order to make the purpose, technical solutions and advantages of this application more clearly understood, the present application is further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain this application and are not intended to limit this application.

[0029] In order to solve the technical problem that the leaching residue particles diffuse into the supernatant due to the high temperature of the slurry in the thickener, making the supernatant turbid and affecting the flocculation and sedimentation effect, the present application provides an enhanced thickening mechanism for CCD countercurrent washing, which can achieve mixed flocculation of the supernatant, turbid liquid and flocculant, improve the flocculation effect, reduce the turbidity that may be generated in the supernatant, and make the output supernatant less turbid.

[0030] It should be noted that the enhanced thickening mechanism for CCD countercurrent washing described in this application is used for but not limited to the first-stage countercurrent washing thickener. For the sake of convenience, in this application, only the application of the enhanced thickening mechanism for CCD countercurrent washing to the first-stage countercurrent washing thickener is used as an example for explanation. The principle of applying the enhanced thickening mechanism for CCD countercurrent washing to other types of equipment is essentially the same as the principle applied to the first-stage countercurrent washing thickener, and will not be repeated here.

[0031] See also Figure 1 , Figure 1This is a structural diagram of an enhanced thickening mechanism for CCD countercurrent washing in an embodiment of the present application. The enhanced thickening mechanism for CCD countercurrent washing includes a cylinder 1 and a stirring mechanism 2. A flocculant adding pipe 101 is provided on the upper part of the cylinder 1 for adding flocculant, and the top of the cylinder 1 is open, corresponding to the supernatant layer 5, for allowing the supernatant to overflow into the cylinder 1. A through hole 102 is provided in the middle of the cylinder 1, corresponding to the turbid liquid layer 6, for allowing the turbid liquid to enter the cylinder 1 through the through hole 102. In the cylinder 1, the overflowing supernatant has a certain effect on the slurry. The cooling effect is achieved, and with the through-hole 102 connected, the generated turbid liquid enters the cylinder 1, and the flocculant, supernatant and turbid liquid are mixed in the cylinder 1. Therefore, the turbid liquid can be flocculated again by the flocculant to reduce the turbidity of the supernatant and make the output supernatant turbidity lower; the stirring mechanism 2 is provided on the inner side of the cylinder 1, and is used to stir the liquid in the cylinder 1. The stirring end of the stirring mechanism 2 is provided in the middle and lower part of the cylinder 1, and is used to rotate and stir in the cylinder 1 to promote the mixing of the supernatant, turbid liquid and flocculant to form a better flocculation effect.

[0032] It is understandable that in the CCD countercurrent washing process, since the temperature of the slurry transported in the first stage countercurrent washing is the highest, it is most likely that the supernatant will be turbid. Therefore, the enhanced thickening mechanism is mainly used for the thickener of the first stage countercurrent washing and is installed in the thickener.

[0033] In one embodiment, see Figure 1 The stirring mechanism 2 includes a motor 21, a stirring shaft 22 and a stirring impeller 23. The stirring shaft 22 is connected to the drive shaft of the motor 21 and is located on the central axis of the cylinder 1. The stirring impeller 23 is installed on the stirring shaft 22 and is located in the middle and lower part of the cylinder 1. The stirring shaft 22 is driven to rotate by the motor 21, and the stirring shaft 22 drives the stirring impeller 23 to rotate, thereby achieving mixing and flocculation of the supernatant, turbid liquid and flocculant under the stirring action of the impeller.

[0034] It can be understood that the stirring mechanism 2 can be the stirring part of the thickener itself, that is, the rotating drive part of the rake, on which the shaft, that is, the stirring shaft 22, is installed with a stirring impeller 23, which rotates synchronously with the rotation of the rake to mix the supernatant, turbid liquid and flocculant in the cylinder 1.

[0035] In one embodiment, see Figure 3 and Figure 5 The cylinder 1 is shaped like an upper trumpet with the stirring end of the stirring mechanism 2 as the dividing line. The upper trumpet prompts the supernatant to gather toward the center, and the lower trumpet prompts the mixed and flocculated liquid to diffuse toward the periphery, playing a role of centralized mixing and flocculation and then uniform distribution.

[0036] In one embodiment, see Figure 2 and Figure 4 A hole 103 is provided on the upper part of the cylinder 1 for the supernatant to flow in. The supernatant flows into the cylinder 1 from the hole 103. When the liquid level of the supernatant cannot achieve an overflow effect, the supernatant can flow into the cylinder 1 from the hole 103 to ensure the flocculation effect. Moreover, the flow rate of the supernatant entering through the hole 103 is slowed down, thereby avoiding excessive supernatant entering the cylinder 1 and affecting the final flocculation effect.

[0037] Furthermore, there are multiple holes 103 , which are arranged in a multi-layered circumferential pattern from top to bottom, so that the supernatant can enter the cylinder 1 evenly.

[0038] In one embodiment, see Figure 1 and Figure 2 The number of the through hole 102 is at least one, which is used to connect the external turbid liquid with the interior of the cylinder 1 so that the turbid liquid can flow into the cylinder 1.

[0039] Furthermore, the number of the through holes 102 is four and they are distributed in a circular pattern around the outer circumference of the cylinder 1 .

[0040] In one embodiment, see Figure 1 A diluent pipe 104 is also provided on the upper part of the cylinder 1 for introducing the overflow supernatant in the next-stage countercurrent washing and thickening machine into the cylinder 1 to further cool and dilute the liquid.

[0041] Furthermore, a plurality of branch pipes 1041 are provided at the end of the diluent pipe 104. The plurality of branch pipes 1041 are arranged circumferentially on the upper portion of the cylinder 1, and can evenly distribute the overflow supernatant pumped into the next-stage countercurrent washing and thickening machine.

[0042] In one embodiment, see Figure 1 There are multiple flocculant adding pipes 101 , and the multiple flocculant adding pipes 101 are arranged in a circumferential manner on the upper part of the cylinder 1 so that the flocculant is evenly distributed in the cylinder 1 .

[0043] In one embodiment, see Figure 1 A distributor 3 is provided under the cylinder 1. The distributor 3 is in the shape of a cone umbrella, and there is a gap between the lower edge of the distributor 3 and the bottom of the cylinder 1. The distributor 3 is used to evenly distribute the material to ensure the effectiveness and consistency of the subsequent treatment process. It can evenly distribute the slurry into the thickener to ensure the uniformity and efficiency of the washing or concentration process.

[0044] In order to better understand this application, Figures 1 to 5The technical solution of this application is described in detail:

[0045] The supernatant enters the cylinder 1 by overflowing or passing through the hole 103; the turbid liquid enters the cylinder 1 through the through hole 102; the flocculant is injected into the cylinder 1 through the flocculant addition pipe 101; the overflow supernatant in the next-stage countercurrent washing and thickening machine is introduced into the cylinder 1 through the diluent pipe 104; under the drive of the stirring mechanism 2, the stirring impeller 23 stirs and mixes the supernatant, the overflow supernatant in the next-stage countercurrent washing and thickening machine, the turbid liquid and the flocculant to promote flocculation and make the output supernatant less turbid.

[0046] The specific implementation methods of the present application described above do not limit the scope of protection of the present application. Any other corresponding changes and modifications made based on the technical concept of the present application should be included in the scope of protection of the claims of the present application.

Claims

1. A CCD countercurrent washing enhanced thickening mechanism, installed in a thickener, characterized in that: include: A cylinder, wherein a flocculant addition pipe is provided at the upper portion of the cylinder, the top of the cylinder is open for allowing the supernatant to overflow into the cylinder, and a through hole is provided in the middle portion of the cylinder for allowing the turbid liquid to enter the cylinder through the through hole; and The stirring mechanism is arranged inside the cylinder and is used for stirring the liquid in the cylinder. The stirring end of the stirring mechanism is arranged at the middle and lower part of the cylinder.

2. The enhanced thickening mechanism for CCD countercurrent washing according to claim 1, characterized in that: The stirring mechanism includes a motor, a stirring shaft and a stirring impeller. The stirring shaft is connected to the driving shaft of the motor and is located on the central axis of the cylinder. The stirring impeller is installed on the stirring shaft and is located in the middle and lower part of the cylinder.

3. The enhanced thickening mechanism for CCD countercurrent washing according to claim 1, characterized in that: The cylinder is trumpet-shaped with the stirring end of the stirring mechanism as a dividing line.

4. The enhanced thickening mechanism for CCD countercurrent washing according to claim 1, characterized in that: The upper portion of the cylinder is provided with a hole for allowing the supernatant to flow in.

5. The enhanced thickening mechanism for CCD countercurrent washing according to claim 4, characterized in that: There are multiple holes, and the holes are arranged in multiple layers from top to bottom.

6. The enhanced thickening mechanism for CCD countercurrent washing according to claim 1, characterized in that: The number of the through hole is at least one.

7. The enhanced thickening mechanism for CCD countercurrent washing according to claim 1, characterized in that: A diluent pipeline is also provided on the upper portion of the cylinder for introducing the overflow supernatant from the next-stage countercurrent washing and thickening machine into the cylinder.

8. The enhanced thickening mechanism for CCD countercurrent washing according to claim 7, characterized in that: A plurality of branch pipes are provided at the end of the diluent pipeline, and the plurality of branch pipes are arranged circumferentially on the upper part of the cylinder.

9. The enhanced thickening mechanism for CCD countercurrent washing according to claim 1, characterized in that: There are multiple flocculant adding pipes, and the multiple flocculant adding pipes are arranged in a circumferential manner on the upper part of the cylinder.

10. The enhanced thickening mechanism for CCD countercurrent washing according to claim 1, characterized in that: A distributor is provided below the cylinder. The distributor is in the shape of a cone umbrella, and a gap is provided between the lower edge of the distributor and the bottom of the cylinder.

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