Ion exchange system for laterite-nickel ore leachate

Abstract

The invention discloses a laterite-nickel ore leachate ion exchange system which comprises a plurality of ion exchange resin columns which are sequentially connected end to end, and each ion exchange resin column comprises a head part, a middle part and a tail part which are sequentially connected, one end, far away from the middle part, of the head part is rotatably provided with a head part perforated plate and a head part pipeline communicated with an inner cavity of the head part, and one end, far away from the middle part, of the tail part is provided with a tail part perforated plate and a tail part pipeline communicated with an inner cavity of the tail part; the head perforated plate and the tail perforated plate of the previous ion exchange resin column are attached and can rotate relatively, so that the head perforated plate and the tail perforated plate at least have a complete conduction state in which the hole sites are completely aligned and a cut-off state in which the hole sites are completely not aligned. According to the ion exchange system provided by the invention, the series-parallel connection state of each ion exchange resin column can be switched when various working procedures such as leaching, desorption and back flushing are carried out, so that the treatment efficiency is improved.

Description

Technical Field

[0001] The present application relates to the technical field of nickel ore smelting, and in particular to an ion exchange system for laterite nickel ore leachate. Background Art

[0002] Laterite nickel ore is a loose clay-like multi-mineral aggregate formed by long-term weathering, leaching, dissemination, alteration and other geological processes of nickel-bearing olivine bedrock in tropical or subtropical regions, accompanied by metal components such as nickel, cobalt, chromium, magnesium, and aluminum. At present, the main method for processing low-grade laterite nickel ore is high-pressure acid leaching (abbreviated as HPAL), while the ion exchange process can be used to purify and recover nickel and cobalt in the laterite nickel ore leachate.

[0003] Chinese patent CN111001444A discloses an ion exchange resin tower, which is composed of a plurality of short-circuited resin columns, each of which is connected by a flange. The upper and lower ends of the resin tower are provided with a head, and the head has a pipe opening for supplying liquid in and out. Two porous plates and a pad are placed between the short-circuited resin columns to form a cylindrical cavity structure. The pad is a hollow structure, and the cavity diameter is consistent with the inner diameter of the resin tower.

[0004] However, the problem is that the resin columns are connected in series. After the adsorption of nickel and cobalt ions is completed, the subsequent elution, desorption, recoil and other steps are still kept in series, resulting in low processing efficiency of the elution, desorption, recoil and other processes. Summary of the invention

[0005] The purpose of this application is to overcome the above technical deficiencies and propose a laterite nickel ore leachate ion exchange system to solve the technical problem in the prior art that the subsequent elution, desorption, recoil and other processes are less efficient due to the series connection of ion exchange resin columns.

[0006] In order to achieve the above technical objectives, this application adopts the following technical solutions: The present application provides a laterite nickel ore leachate ion exchange system, comprising: A plurality of ion exchange resin columns are connected end to end in sequence, and the ion exchange resin columns include a head portion, a middle portion and a tail portion which are connected in sequence, wherein a head portion porous plate and a head portion pipe communicating with a cavity in the head portion are rotatably provided on one end of the head portion away from the middle portion, and a tail portion porous plate and a tail portion pipe communicating with a cavity in the tail portion are provided on one end of the tail portion away from the middle portion, wherein the head portion porous plate is attached to the tail portion porous plate of the previous ion exchange resin column and can rotate relative to each other, so that the two have at least a fully conductive state in which the pores are fully aligned and a cut-off state in which the pores are completely misaligned.

[0007] In some embodiments, the head includes a head tube body and a rotating ring. The head tube body is tubular and one end is fixed to the middle part. The rotating ring is sealed and connected to the other end of the head tube body and can rotate relative to each other. The head porous plate is fixed on the rotating ring. The head pipe is arranged on the head tube body and is connected to the internal cavity of the head tube body.

[0008] In some embodiments, the middle portion is tubular, a resin column is fixed inside the middle portion, and a cavity is formed between the end of the resin column and the head portion and the tail portion.

[0009] In some embodiments, the tail portion includes a tail tube body, which is tubular, one end of which is fixed to the middle portion, and the other end of which is fixed with the tail porous plate, and the tail porous plate is flush with the end surface of the tail tube body.

[0010] In some embodiments, the rotating ring is formed with a lower convex ring on the annular surface close to the head tube body, and a lower annular groove matching the lower convex ring is correspondingly opened at the end of the head tube body, and an upper convex ring is formed on the annular surface of the rotating ring close to the previous ion exchange resin column, and an upper annular groove matching the upper convex ring is correspondingly opened at the end of the tail of the previous ion exchange resin column, and the lower convex ring is rotatably assembled with the lower annular groove, and the upper convex ring is rotatably assembled with the upper annular groove.

[0011] In some embodiments, a header valve is provided on the header pipe to control the conduction or cutoff of the header pipe.

[0012] In some embodiments, the tail pipe is disposed on the tail pipe body and is connected to the cavity in the tail pipe body.

[0013] In some embodiments, a tail valve is provided on the tail pipeline to control the conduction or cutoff of the tail pipeline.

[0014] In some embodiments, the front porous plate is provided with a plurality of front through holes, and the rear porous plate is provided with a plurality of rear through holes, and the front through holes are matched with the rear through holes in a one-to-one correspondence.

[0015] In some embodiments, the middle portion is connected to the head portion and the tail portion via flanges.

[0016] Compared with the prior art, the laterite nickel ore leachate ion exchange system provided by the present application includes a plurality of ion exchange resin columns, the ion exchange resin columns are connected end to end in sequence, the ion exchange resin columns include a head, a middle part and a tail part connected in sequence, the head part is rotatably provided with a head porous plate and a head pipe connected to the cavity inside the head part on one end away from the middle part, the tail part is provided with a tail porous plate and a tail pipe connected to the cavity inside the head part on one end away from the middle part, wherein the head porous plate is attached to the tail porous plate of the previous ion exchange resin column and can rotate relative to each other, so that the two have at least a fully conductive state with completely aligned pores and a cut-off state with completely misaligned pores. Therefore, the ion exchange system in the present application can switch the series-parallel state of each ion exchange resin column when performing various processes such as elution, desorption, and recoil, thereby improving the processing efficiency.

[0017] The above description is only an overview of the technical solution of the present application. In order to more clearly understand the technical means of the present application and implement it according to the contents of the specification, the preferred embodiments of the present application are described in detail as follows in conjunction with the accompanying drawings. The specific implementation methods of the present application are given in detail by the following embodiments and their accompanying drawings. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 It is a structural schematic diagram of the laterite nickel ore leachate ion exchange system provided by the present application; Figure 2 It is a cross-sectional schematic diagram of the laterite nickel ore leachate ion exchange system provided in the present application.

[0019] Description of reference numerals: 1-ion exchange resin column, 11-head, 111-head porous plate, 112-head pipeline, 113-head tube body, 114-rotating ring, 12-middle part, 121-resin, 13-tail, 131-tail porous plate, 132-tail pipeline, 133-tail tube body. DETAILED DESCRIPTION

[0020] In order to make the purpose, technical solution and advantages of the present application more clearly understood, the present application is further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present application and are not used to limit the present application.

[0021] See also Figure 1 , Figure 2The present application provides an ion exchange system for laterite nickel ore leachate, comprising a plurality of ion exchange resin columns 1, wherein the ion exchange resin columns 1 are connected end to end in sequence, and the ion exchange resin columns 1 comprise a head portion 11, a middle portion 12 and a tail portion 13 connected in sequence, wherein a head porous plate 111 and a head pipe 112 communicating with a cavity in the head portion 11 are rotatably provided on an end of the head portion 11 away from the middle portion 12, and a tail porous plate 131 and a tail pipe 132 communicating with a cavity in the tail portion 13 are provided on an end of the tail portion 13 away from the middle portion 12, wherein the head porous plate 111 is attached to the tail porous plate 131 of the previous ion exchange resin column 1 and can rotate relative to each other, so that the two have at least a fully conductive state in which the pores are completely aligned and a cut-off state in which the pores are completely misaligned.

[0022] In the present application, the conduction state between two adjacent ion exchange resin columns 1 can be adjusted by rotating the head porous plate 111; when the two adjacent ion exchange resin columns 1 are in a fully conductive state, each of the ion exchange resin columns 1 is connected in series to adsorb the nickel ion solution. After the adsorption is completed, the head porous plate 111 can be rotated to adjust the two adjacent ion exchange resin columns to a cut-off state, and each of the ion exchange resin columns 1 is connected in parallel, and elution can be achieved by injecting liquid into the upper head pipe 112 and draining liquid from the lower tail pipe 132, or by injecting liquid into the lower tail pipe 132 and draining liquid from the upper head pipe 112 to achieve desorption and backwashing; the ion exchange system in the present application can switch the series and parallel states of each ion exchange resin column 1 during various processes such as elution, desorption, and backwashing to improve the processing efficiency. .

[0023] In this embodiment, the head 11 includes a head tube body 113 and a rotating ring 114. The head tube body 113 is tubular and one end is fixed to the middle part 12. The rotating ring 114 is sealed and connected to the other end of the head tube body 113 and can rotate relative to each other. The head porous plate 111 is fixed on the rotating ring 114. The head pipe 112 is arranged on the head tube body 113 and is connected to the internal cavity of the head tube body 113.

[0024] There are multiple ways of connecting the rotating ring 114 to the head tube body 113 and the previous ion exchange resin column 1 in rotation. In the present embodiment, a lower convex ring is formed on the annular surface of the rotating ring 114 close to the head tube body 113, and a lower annular groove matching the lower convex ring is correspondingly provided at the end of the head tube body 113. An upper convex ring is formed on the annular surface of the rotating ring 114 close to the previous ion exchange resin column 1, and an upper annular groove matching the upper convex ring is correspondingly provided at the end of the tail 13 of the previous ion exchange resin column 1. The lower convex ring is rotationally assembled with the lower annular groove, and the upper convex ring is rotationally assembled with the upper annular groove.

[0025] The middle part 12 is tubular, and a resin 121 is fixed inside the middle part 12. A cavity is formed between the end of the resin 121 and the head part 11 and the tail part 13. Specifically, when the resin tower is in operation, the liquid flows axially from bottom to top. Due to the limitation of the resin particle size, the uniformity of the radial distribution is deviated. The radial distribution of the liquid is inconsistent when passing through the resin layer, forming a bias flow. If the deviation cannot be corrected in time, it will eventually lead to overall bias flow, affecting the operating efficiency and product quality of the resin tower, and increasing material consumption and environmental burdens. Therefore, the embodiment of the present application sets a cavity structure at the end of the resin column, and the liquid will flow into the cavity after a period of axial flow, which can make the solution with uneven concentration remixed, achieve the effect of timely correction, and thus effectively control the uniformity of liquid distribution in the final resin tower.

[0026] In this embodiment, a header valve is provided on the header pipe 112 to control the conduction or cutoff of the header pipe 112 .

[0027] In this embodiment, the tail portion 13 includes a tail tube body 133, which is tubular, one end of which is fixed to the middle portion 12, and the other end of which is fixed with the tail porous plate 131, and the tail porous plate 131 is flush with the end surface of the tail tube body 133. This ensures that when two ion exchange resin columns 1 are connected, the tail porous plate 131 of the previous ion exchange resin column 1 fits with the head porous plate 111 of the next ion exchange resin column 1.

[0028] In this embodiment, the tail pipe 132 is disposed on the tail pipe body 133 and communicates with the cavity in the tail pipe body 133 .

[0029] In this embodiment, a tail valve is provided on the tail pipe 132 to control the conduction or cutoff of the tail pipe 132 .

[0030] The front porous plate 111 is provided with a plurality of front through holes, and the rear porous plate 131 is provided with a plurality of rear through holes, and the front through holes are matched with the rear through holes in a one-to-one correspondence.

[0031] In this embodiment, the middle part 12 is connected to the head part 11 and the tail part 13 via flanges. When the resin column in the middle part 12 needs to be replaced, the middle part 12 can be separated from the head part 11 and the tail part 13 to replace the resin column inside.

[0032] In order to better understand the present application, the technical solution of the present application is described in detail below with reference to the accompanying drawings: During the adsorption process, the head through holes on the head porous plate 111 correspond to the tail through holes on the tail porous plate 131 one by one, so that the ion exchange resin columns 1 are connected, and the nickel ion solution passes through each of the ion exchange resin columns 1 in turn to perform the adsorption process; after the adsorption process is completed, the rotating ring 114 is rotated to make the head through holes on the head porous plate 111 completely not correspond to the tail through holes on the tail porous plate 131, and the connection between two adjacent ion exchange resin columns 1 is cut off, and each ion exchange resin column 1 is connected in parallel, and the elution process can be realized by injecting liquid into the upper head pipe 112 and discharging liquid from the lower tail pipe 132, or the desorption backwashing process can be realized by injecting liquid into the lower tail pipe 132 and discharging liquid from the upper head pipe 112.

[0033] Beneficial effects of the present application: The laterite nickel ore leachate ion exchange system provided by the present application comprises a plurality of ion exchange resin columns, wherein the plurality of ion exchange resin columns are connected end to end in sequence, wherein the ion exchange resin columns comprise a head, a middle and a tail connected in sequence, wherein the head is rotatably provided with a head porous plate and a head pipe connected to the inner cavity of the head on one end away from the middle, and the tail is provided with a tail porous plate and a tail pipe connected to the inner cavity of the tail on one end away from the middle, wherein the head porous plate is attached to the tail porous plate of the previous ion exchange resin column and can rotate relative to each other, so that the two have at least a fully conductive state with completely aligned pore positions and a cut-off state with completely misaligned pore positions. The ion exchange system in the present application can switch the series-parallel state of each ion exchange resin column during various processes such as elution, desorption and recoil, thereby improving the processing efficiency.

[0034] The specific implementation methods of the present application described above do not constitute a limitation on the protection scope of the present application. Any other corresponding changes and modifications made according to the technical concept of the present application should be included in the protection scope of the claims of the present application.

Claims

1. A laterite nickel ore leachate ion exchange system, characterized in that: It includes: A plurality of ion exchange resin columns are connected end to end in sequence, and the ion exchange resin columns include a head portion, a middle portion and a tail portion which are connected in sequence, wherein a head portion porous plate and a head portion pipe communicating with a cavity in the head portion are rotatably provided on one end of the head portion away from the middle portion, and a tail portion porous plate and a tail portion pipe communicating with a cavity in the tail portion are provided on one end of the tail portion away from the middle portion, wherein the head portion porous plate is attached to the tail portion porous plate of the previous ion exchange resin column and can rotate relative to each other, so that the two have at least a fully conductive state in which the pores are fully aligned and a cut-off state in which the pores are completely misaligned.

2. The laterite nickel ore leachate ion exchange system according to claim 1, characterized in that: The head includes a head tube body and a rotating ring. The head tube body is tubular and one end is fixed to the middle part. The rotating ring is sealed and connected to the other end of the head tube body and can rotate relatively. The head porous plate is fixed on the rotating ring. The head pipeline is arranged on the head tube body and is connected to the internal cavity of the head tube body.

3. The laterite nickel ore leachate ion exchange system according to claim 1, characterized in that: The middle part is in a tubular shape, resin is fixed inside the middle part, and a cavity is formed between the end of the resin and the head part and the tail part.

4. The laterite nickel ore leachate ion exchange system according to claim 1, characterized in that: The tail portion comprises a tail portion tube body, which is tubular, one end of which is fixed to the middle portion, and the other end of which is fixed with the tail portion porous plate, and the tail portion porous plate is flush with the end surface of the tail portion tube body.

5. The laterite nickel ore leachate ion exchange system according to claim 2, characterized in that: The rotating ring is formed with a lower convex ring on the annular surface close to the head tube body, and a lower annular groove matching the lower convex ring is correspondingly opened at the end of the head tube body; an upper convex ring is formed on the annular surface of the rotating ring close to the previous ion exchange resin column, and an upper annular groove matching the upper convex ring is correspondingly opened at the end of the tail of the previous ion exchange resin column; the lower convex ring is rotatably assembled with the lower annular groove, and the upper convex ring is rotatably assembled with the upper annular groove.

6. The laterite nickel ore leachate ion exchange system according to claim 2, characterized in that: The head pipe is provided with a head valve for controlling the conduction or cutoff of the head pipe.

7. The laterite nickel ore leachate ion exchange system according to claim 4, characterized in that: The tail pipe is arranged on the tail pipe body and communicated with the cavity in the tail pipe body.

8. The laterite nickel ore leachate ion exchange system according to claim 7, characterized in that: The tail pipe is provided with a tail valve for controlling the conduction or cutoff of the tail pipe.

9. The laterite nickel ore leachate ion exchange system according to claim 1, characterized in that: The front porous plate is provided with a plurality of front through holes, and the rear porous plate is provided with a plurality of rear through holes, and the front through holes are matched with the rear through holes in a one-to-one correspondence.

10. The laterite nickel ore leachate ion exchange system according to claim 1, characterized in that: The middle part is connected with the head part and the tail part through flanges.

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