Ion exchange system for laterite nickel ore leaching solution

Abstract

The present application discloses an ion exchange system for a laterite nickel ore leaching solution, comprising a plurality of ion exchange resin columns connected end to end in sequence. Each ion exchange resin column comprises a head portion, a middle portion, and a tail portion which are connected in sequence. A head portion perforated plate and a head portion pipe in communication with a cavity inside the head portion are rotatably provided on the end of the head portion away from the middle portion, and a tail portion perforated plate and a tail portion pipe in communication with a cavity inside the tail portion are provided on the end of the tail portion away from the middle portion, wherein the head portion perforated plate is attached to the tail portion perforated plate of the previous ion exchange resin column and can rotate relative to the tail portion perforated plate, so that the head portion perforated plate and the tail portion perforated plate are at least in a complete connection state in which hole positions are completely aligned and a disconnection state in which the hole positions are completely misaligned. The ion exchange system provided by the present application allows for switching of the series-connection state or parallel-connection state of the ion exchange resin columns when performing various procedures such as elution, desorption, and backflushing, thereby improving the treatment efficiency.

Description

A laterite nickel ore leaching solution ion exchange system TECHNICAL FIELD

[0001] The present application relates to the technical field of nickel ore smelting, in particular to a laterite nickel ore leaching solution ion exchange system. BACKGROUND

[0002] Laterite nickel ore is a loose clay-like multi-mineral aggregate formed by long-term weathering, leaching, impregnation and alteration of nickel-bearing olivine-based rocks 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 process (HPAL for short), and ion exchange process can be used for purification and recovery of nickel and cobalt in laterite nickel ore leaching solution.

[0003] Chinese patent CN111001444A discloses an ion exchange resin tower, which is composed of multiple resin column short connections, each resin column short connection is connected by flanges, the upper and lower ends of the resin tower are provided with end caps, the end caps have pipe openings for inlet and outlet liquid, two porous plates and a gasket plate are placed between the resin column short connections to form a cylindrical cavity structure, the gasket plate is a hollow structure, and the cavity diameter is consistent with the inner diameter of the resin tower.

[0004] However, the resin column is connected in series, and after adsorbing nickel and cobalt ions, the subsequent steps of leaching, desorption and backwashing are still in series, resulting in low processing efficiency of the leaching, desorption and backwashing processes.

[0005] SUMMARY

[0006] The present application aims to overcome the above technical deficiencies and provides a laterite nickel ore leaching solution ion exchange system to solve the technical problem of low processing efficiency of subsequent leaching, desorption and backwashing processes caused by the series connection of ion exchange resin columns in the prior art.

[0007] To achieve the above technical purpose, the following technical solutions are adopted in the present application:

[0008] The present application provides a laterite nickel ore leaching solution ion exchange system, which comprises:

[0009] A plurality of ion exchange resin columns, a plurality of the ion exchange resin columns are connected in sequence, the ion exchange resin column comprises a head, a middle and a tail which are connected in sequence, the head is provided with a head porous plate and a head pipeline which communicates with the internal cavity of the head at the end away from the middle, the tail is provided with a tail porous plate and a tail pipeline which communicates with the internal cavity of the tail at the 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 relatively, so that the two have at least a completely aligned state of the hole position and a completely misaligned state of the hole position.

[0010] In some embodiments, the head comprises a head pipe body and a rotating ring, the head pipe body is tubular, one end is fixed with the middle, the rotating ring is sealingly connected with the other end of the head pipe body and can rotate relatively, the head porous plate is fixed on the rotating ring, and the head pipeline is arranged on the head pipe body and communicates with the internal cavity of the head pipe body.

[0011] In some embodiments, the middle is tubular, the resin column is fixed internally in the middle, and the end of the resin column forms a cavity between the head and the tail.

[0012] In some embodiments, the tail comprises a tail pipe body, the tail pipe body is tubular, one end is fixed with the middle, and the other end is fixed with the tail porous plate, and the tail porous plate is flush with the end face of the tail pipe body.

[0013] In some embodiments, the rotating ring is formed with a lower convex ring near the torus of the head pipe body, the end of the head pipe body is correspondingly provided with a lower annular groove matched with the lower convex ring, the rotating ring is formed with an upper convex ring near the torus of the previous ion exchange resin column, the end of the tail of the previous ion exchange resin column is correspondingly provided with an upper annular groove matched with the upper convex ring, and the lower convex ring and the lower annular groove are rotationally assembled, and the upper convex ring and the upper annular groove are rotationally assembled.

[0014] In some embodiments, the head pipeline is provided with a head valve for controlling the conduction or cutoff of the head pipeline.

[0015] In some embodiments, the tail pipeline is arranged on the tail pipe body and communicates with the cavity in the tail pipe body.

[0016] In some embodiments, the tail pipeline is provided with a tail valve for controlling the conduction or cutoff of the tail pipeline.

[0017] In some embodiments, the head porous plate is provided with a plurality of head through holes, and the tail porous plate is provided with a plurality of tail through holes, and the head through holes and the tail through holes are one-to-one corresponding and matched.

[0018] In some embodiments, the middle part is connected to the head part and the tail part through flanges.

[0019] Compared with the prior art, the ion exchange system for laterite nickel ore leaching solution provided by the application comprises a plurality of ion exchange resin columns, the ion exchange resin columns are sequentially connected in a head-to-tail manner, the ion exchange resin column comprises a head part, a middle part and a tail part which are sequentially connected, a head porous plate is rotatably arranged on one end of the head part away from the middle part, a head pipeline in communication with the internal cavity of the head part is arranged on the head porous plate, a tail porous plate is arranged on one end of the tail part away from the middle part, and a tail pipeline in communication with the internal cavity of the head part is arranged on the tail porous plate, wherein the head porous plate is attached to the tail porous plate of the previous ion exchange resin column and can rotate relative to the tail porous plate of the previous ion exchange resin column, so that the head porous plate and the tail porous plate of the previous ion exchange resin column have at least a completely conductive state in which the hole positions are completely aligned and a cut-off state in which the hole positions are not aligned at all. Therefore, the ion exchange system in the application can switch the series-parallel state of each ion exchange resin column when performing various processes such as elution, desorption and backflush, thereby improving the processing efficiency.

[0020] The above description is only a summary of the technical scheme of the application. In order to more clearly understand the technical means of the application and can be implemented according to the content of the description, the preferred embodiments of the application are described in detail below with the help of the accompanying drawings. The specific embodiments of the application are given in detail by the following examples and their accompanying drawings. BRIEF DESCRIPTION OF DRAWINGS

[0021] FIG. 1 is a structural schematic view of the ion exchange system for laterite nickel ore leaching solution provided by the application;

[0022] FIG. 2 is a cross-sectional schematic view of the ion exchange system for laterite nickel ore leaching solution provided by the application.

[0023] Explanation of reference signs:

[0024] 1-ion exchange resin column, 11-head part, 111-head porous plate, 112-head pipeline, 113-head pipe body, 114-rotating ring, 12-middle part, 121-resin, 13-tail part, 131-tail porous plate, 132-tail pipeline, 133-tail pipe body. DETAILED DESCRIPTION

[0025] In order to make the purpose, technical scheme and advantages of the application more clear, the application is further described in detail below with the help of the accompanying drawings and examples. It should be understood that the specific embodiments described herein are only used to explain the application and not to limit the application.

[0026] Please refer to figure 1, figure 2; the application provides a kind of laterite nickel ore leaching solution ion exchange system, including multiple ion exchange resin columns 1, the ion exchange resin column 1 is sequentially connected head to tail, the ion exchange resin column 1 includes sequentially connected head 11, middle part 12 and tail 13, the head 11 is rotatably provided with head porous plate 111 on the end away from the middle part 12 and head duct 112 communicated with the internal cavity of the head 11, the tail 13 is provided with tail porous plate 131 and tail duct 132 communicated with the internal cavity of the tail 13 on the end away from the middle part 12, wherein the head porous plate 111 is attached with the tail porous plate 131 of the previous ion exchange resin column 1 and can be relatively rotated, so that both at least have the complete conduction state of complete alignment of hole site and the cut-off state of hole site complete misalignment.

[0027] In the application, the conduction state between adjacent two ion exchange resin columns 1 can be adjusted by rotating the head porous plate 111;When adjacent two ion exchange resin columns 1 are in complete conduction state, each ion exchange resin column 1 forms series, and nickel ion solution is ion absorbed, when absorption is completed, the head porous plate 111 can be rotated, and adjacent two ion exchange resin columns are adjusted to cut-off state, each ion exchange resin column 1 forms parallel, and can be realized by the head duct 112 of upper part injection, the tail duct 132 of lower part discharge to realize elution, or the tail duct 132 of lower part injection, the head duct 112 of upper part discharge to realize desorption backwashing;Ion exchange system in the application can switch the series-parallel state of each ion exchange resin column 1 when carrying out elution, desorption, back flushing and various processes, improve processing efficiency.

[0028] In the embodiment, the head 11 includes head pipe body 113 and rotating ring 114, the head pipe body 113 is tubular, one end is fixed with the middle part 12, the rotating ring 114 is sealingly connected with the other end of the head pipe body 113 and can be relatively rotated, the head porous plate 111 is fixed on the rotating ring 114, and the head duct 112 is arranged on the head pipe body 113 and communicated with the internal cavity of the head pipe body 113.

[0029] The rotating ring 114 is connected to the head pipe body 113 and the previous ion exchange resin column 1 in multiple ways. In the embodiment, a lower convex ring is formed on the surface of the rotating ring 114 close to the head pipe body 113, a lower annular groove corresponding to the lower convex ring is formed on the end of the head pipe body 113, an upper convex ring is formed on the surface of the rotating ring 114 close to the previous ion exchange resin column 1, and an upper annular groove corresponding to the upper convex ring is formed on the end of the tail 13 of the previous ion exchange resin column 1. The lower convex ring and the lower annular groove are rotatably assembled, and the upper convex ring and the upper annular groove are rotatably assembled.

[0030] The middle part 12 is tubular, the resin 121 is fixed inside the middle part 12, and a cavity is formed between the end of the resin 121 and the head 11 and the tail 13. Specifically, when the resin tower is running, the liquid flows axially from bottom to top. Due to the limitation of the granularity of the resin, the uniformity of the radial distribution is deviated, the radial distribution of the liquid passing through the resin layer is inconsistent, and the flow is deviated. If it cannot be corrected in time, it will eventually cause overall flow deviation, affect the running efficiency of the resin tower and the product quality, and increase the consumption and environmental burden. Therefore, the cavity structure is arranged at the end of the resin column in the embodiment, the liquid flows into the cavity after flowing in the axial direction for a period of time, the solution with uneven concentration can be mixed again, the effect of timely correction is achieved, and the uniformity of the liquid distribution in the final resin tower is effectively controlled.

[0031] In the embodiment, the head pipe 112 is provided with a head valve for controlling the conduction or cutoff of the head pipe 112.

[0032] In the embodiment, the tail 13 includes a tail pipe body 133, which is tubular, one end of which is fixed to the middle part 12, and the other end of which is fixed with the tail perforated plate 131, and the tail perforated plate 131 is flush with the end surface of the tail pipe body 133. Thus, when the two ion exchange resin columns 1 are connected, the tail perforated plate 131 of the previous ion exchange resin column 1 is attached to the head perforated plate 111 of the subsequent ion exchange resin column 1.

[0033] In the embodiment, the tail pipe 132 is arranged on the tail pipe body 133 and communicates with the cavity in the tail pipe body 133.

[0034] In the embodiment, the tail pipe 132 is provided with a tail valve for controlling the conduction or cutoff of the tail pipe 132.

[0035] The head porous plate 111 is provided with a plurality of head through holes, and the tail porous plate 131 is provided with a plurality of tail through holes, and the head through hole and the tail through hole are one-to-one corresponding and matched.

[0036] In the embodiment, the middle part 12 is connected with the head part 11 and the tail part 13 through 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, and the internal resin column can be replaced.

[0037] In order to better understand the present application, the technical solutions of the present application are described in detail below in combination with the drawings:

[0038] In the adsorption process, the head through hole on the head porous plate 111 and the tail through hole on the tail porous plate 131 are one-to-one corresponding, so that the ion exchange resin column 1 is in conduction, and the nickel ion solution passes through each ion exchange resin column 1 in turn to perform the adsorption process; after the adsorption process is completed, the rotating ring 114 is rotated, so that the head through hole on the head porous plate 111 and the tail through hole on the tail porous plate 131 are not corresponding at all, the adjacent two ion exchange resin columns 1 are cut off, and each ion exchange resin column 1 is in parallel connection. The elution process can be realized by injecting liquid through the upper head pipeline 112 and discharging liquid through the lower tail pipeline 132, or the desorption backwashing process can be realized by injecting liquid through the lower tail pipeline 132 and discharging liquid through the upper head pipeline 112.

[0039] The beneficial effects of the present application are as follows: the laterite nickel ore leaching solution ion exchange system provided by the present application comprises a plurality of ion exchange resin columns, the ion exchange resin columns are connected in sequence, the ion exchange resin column comprises a head part, a middle part and a tail part connected in sequence, a head porous plate is rotatably arranged on one end of the head part away from the middle part, a head pipeline is arranged in the head part and communicates with the head porous plate, a tail porous plate is arranged on one end of the tail part away from the middle part, and a tail pipeline is arranged in the tail part and communicates with the tail porous plate, wherein the head porous plate is attached to the tail porous plate of the previous ion exchange resin column and can rotate relative to the tail porous plate, so as to have a complete conduction state in which the hole positions of the two are completely aligned and a cut-off state in which the hole positions of the two are not aligned at all. The ion exchange system in the present application can switch the series-parallel connection state of each ion exchange resin column when performing various processes such as elution, desorption and backwashing, thereby improving the processing efficiency.

[0040] The specific embodiments of the present application described above do not constitute a limitation on the protection scope of the present application. Any various other corresponding changes and modifications made according to the technical concept of the present application shall be included in the protection scope of the claims of the present application.

Claims

1. A laterite nickel ore leach liquor ion exchange system characterised in that, It comprises: A plurality of ion exchange resin columns, a plurality of said ion exchange resin columns are connected in sequence, the ion exchange resin column comprises a head, a middle and a tail, the head is rotatably provided with a head porous plate and a head pipeline communicating with the head inner cavity on the end away from the middle, the tail is provided with a tail porous plate and a tail pipeline communicating with the tail inner cavity on the end away from the middle, wherein the head porous plate and the tail porous plate of the previous ion exchange resin column are attached and can rotate relatively, so that they have at least a completely open state with completely aligned hole sites and a cut-off state with completely misaligned hole sites.

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

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

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

5. The ion exchange system for leachate of nickel laterite ore according to claim 2, characterized in that, The rotating ring is formed with a lower convex ring near the annular surface of the head pipe body, the end of the head pipe body is correspondingly provided with a lower annular groove matched with the lower convex ring, the rotating ring is formed with an upper convex ring near the annular surface of the previous ion exchange resin column, and the end of the tail of the previous ion exchange resin column is correspondingly provided with an upper annular groove matched with the upper convex ring, the lower convex ring and the lower annular groove are rotationally assembled, and the upper convex ring and the upper annular groove are rotationally assembled.

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

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

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

9. The ion exchange system for leachate of nickel laterite ore according to claim 1, characterized in that, A plurality of head through holes are formed in the head porous plate, and a plurality of tail through holes are formed in the tail porous plate, the head through holes and the tail through holes are one-to-one corresponding and matched.

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

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