A closed extraction system for yttrium purification production

Abstract

The utility model discloses a kind of closed extraction systems of yttrium purification production, belong to yttrium production field, including first-stage extraction unit to eighth-stage extraction unit in two rows arrangement, first-stage extraction unit to fourth-stage extraction unit from left to right sequentially arrange, fifth-stage extraction unit to eighth-stage extraction unit from right to left sequentially arrange, still including fresh extraction liquid pipe, water liquid final liquid discharge pipe, first aqueous phase liquid pipe to seventh aqueous phase liquid pipe, first extraction liquid pipe to seventh extraction liquid pipe, extraction liquid discharge pipe and yttrium-containing material liquid feed pipe, fresh extraction liquid pipe and water liquid final liquid discharge pipe are connected with first-stage extraction unit respectively, extraction liquid discharge pipe and yttrium-containing material liquid feed pipe are connected with eighth-stage extraction unit, first aqueous phase liquid or extraction liquid pipe to seventh aqueous phase liquid or extraction liquid pipe, one end is connected with an extraction unit, the other end is connected with another extraction unit adjacent to the extraction unit. The utility model yttrium purification efficiency is high, and final product purity can reach more than 99%.

Description

Technical Field

[0001] This utility model relates to the field of yttrium production, and more specifically, to a closed extraction system for yttrium purification production. Background Technology

[0002] In the wet purification process of yttrium, an extraction-washing method is typically used. This method utilizes the difference in partition coefficients of yttrium ions in two solvents to transfer yttrium ions from one solvent to the other. The extracted loaded phase containing the target component is then washed. To achieve high purification efficiency, existing methods employ a staged extraction-washing process, as follows: First-stage extraction: The yttrium-containing feed solution is fed into the aqueous phase inlet of the first-stage extraction tank, where it mixes and reacts with the unloaded organic phase. The target yttrium ions transfer from the aqueous phase to the organic phase, forming a loaded organic phase. First-stage washing: The loaded organic phase is then washed in a water washing tank to remove impurity ions. Second-stage and subsequent operations: The washed loaded organic phase enters subsequent extraction stages for further enrichment of the target yttrium.

[0003] While this method can yield a target product with high purity, it has the following drawbacks: washing equipment is required for each extraction stage, resulting in high costs; the equipment occupies a large area; and more washing water is consumed, leading to higher energy consumption. Utility Model Content

[0004] To address the aforementioned problems, this invention provides a closed-loop extraction system for yttrium purification production, which aims to improve at least one of the problems mentioned in the background art.

[0005] A closed extraction system for yttrium purification production includes first-stage extraction units to eighth-stage extraction units arranged in two rows, wherein the first-stage to fourth-stage extraction units are arranged sequentially from left to right, and the fifth-stage to eighth-stage extraction units are arranged sequentially from right to left. The system also includes a fresh extract pipe, an aqueous final liquid discharge pipe, first-stage to seventh-stage aqueous phase pipes, first-stage to seventh-stage extract pipes, extract drain pipe, and a yttrium-containing feed pipe. The fresh extract pipe and the aqueous final liquid discharge pipe are each connected to a first-stage extraction unit, and the extract drain pipe and the yttrium-containing feed pipe are each connected to an eighth-stage extraction unit. Each of the first-stage to seventh-stage aqueous phase pipes has one end connected to an extraction unit and the other end connected to another adjacent extraction unit.

[0006] Optionally, each extraction unit includes a rectangular box, with a first baffle installed on the bottom wall and a second baffle installed on the top wall. The first and second baffles are staggered and divide the cavity enclosed by the rectangular box into a mixing chamber, a buffer chamber, and a clarification chamber. The mixing chamber is provided with an extractant inlet and an aqueous inlet, and the clarification chamber is provided with an organic phase overflow outlet and an aqueous phase outlet.

[0007] Optionally, a third baffle is also installed inside the rectangular box. The third baffle is installed on the front and rear walls of the clarification chamber. The distance between the third baffle and the aqueous phase outlet is 20-30cm. The bottom of the third baffle is 5-10cm lower than the aqueous phase outlet, and the top is 2-3cm higher than the boundary between the aqueous phase and the organic phase.

[0008] Optionally, the mixing chamber is equipped with a stirring shaft and a stirring paddle connected to the stirring shaft.

[0009] Optionally, an upper horizontal baffle with a first opening is installed above the agitator, and the water inlet is located below the upper horizontal baffle.

[0010] Optionally, a lower horizontal baffle with a second opening is installed below the agitator. The lower horizontal baffle, together with the first baffle and the bottom of the rectangular box, forms an auxiliary chamber. The water inlet is located below the upper horizontal baffle and above the lower horizontal baffle, and the extractant inlet is located below the lower horizontal baffle.

[0011] Compared with the prior art, the beneficial effects of this utility model are as follows:

[0012] This invention has high yttrium purification efficiency, and the purity of the final product can reach over 99%. Attached Figure Description

[0013] To more clearly illustrate the technical solutions in the embodiments of this application or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0014] Figure 1 This is a schematic diagram of the planar structure of the utility model;

[0015] Figure 2 This is a schematic diagram of the pipeline connection between the first-stage extraction unit and the second-stage extraction unit of this utility model;

[0016] Figure 3 This is a schematic diagram of the overall structure of the extraction unit of this utility model.

[0017] Explanation of reference numerals in the attached drawings: 1. First-stage extraction unit; 2. Second-stage extraction unit; 3. Third-stage extraction unit; 4. Fourth-stage extraction unit; 5. Fifth-stage extraction unit; 6. Sixth-stage extraction unit; 7. Seventh-stage extraction unit; 8. Eighth-stage extraction unit; 11. Fresh extract liquid pipe; 12. Aqueous final liquid discharge pipe; 13. First aqueous phase pipe; 14. First extract liquid pipe; 15. Second extract liquid pipe; 20. Rectangular box; 21. Mixing chamber; 22. Clarification chamber; 23. First baffle; 24. Second baffle; 25. Buffer chamber; 26. Extractant inlet; 27. Aqueous liquid inlet; 28. Organic phase overflow port; 29. ​​Aqueous phase outlet; 30. Third baffle; 31. Stirring shaft; 32. Stirring paddle; 33. First opening; 34. Upper horizontal baffle; 35. Second opening; 36. Lower horizontal baffle; 37. Auxiliary chamber. Detailed Implementation

[0018] In the description of this utility model, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "linking" should be interpreted broadly. For example, they can refer to a fixed connection, an indirect connection through an intermediate medium, or the internal communication of two components or the interaction between two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model according to the specific circumstances.

[0019] In the description of this utility model, it should be understood that the terms "upper," "lower," "front," "rear," "vertical," "horizontal," "top," "bottom," "inner," and "outer," etc., indicating the orientation or positional relationship, are based on the orientation or positional relationship shown in the accompanying drawings and are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this utility model. In the description of this utility model, "a plurality of" means two or more, unless otherwise precisely specified.

[0020] The terms “first,” “second,” “third,” “fourth,” etc. (if present) in the specification, claims, and accompanying drawings of this application are used to distinguish similar objects and are not necessarily used to describe a particular order or sequence. It should be understood that such data can be interchanged where appropriate so that the embodiments of this application described herein can be implemented, for example, in orders other than those illustrated or described herein. Furthermore, the terms “comprising” and “having,” and any variations thereof, are intended to cover a non-exclusive inclusion; for example, a process, method, system, product, or apparatus that comprises a series of steps or units is not necessarily limited to those steps or units explicitly listed, but may include other steps or units not explicitly listed or inherent to such processes, methods, products, or apparatus.

[0021] To make the objectives, technical solutions, and advantages of the embodiments of this application clearer, the technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this application, not all embodiments. Based on the embodiments of this application, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this application.

[0022] The technical solution of this utility model will be described in detail below with specific embodiments. The following specific embodiments can be combined with each other, and the same or similar concepts or processes may not be described again in some embodiments.

[0023] Please refer to Figures 1-3 , Figure 1 This is a schematic diagram of the planar structure of this utility model. Figure 2 This is a schematic diagram of the pipeline connection between the first-stage extraction unit and the second-stage extraction unit of this utility model. Figure 3 This is a schematic diagram of the overall structure of the extraction unit of this utility model.

[0024] A closed extraction system for yttrium purification production includes a first-stage extraction unit 1, a second-stage extraction unit 2, a third-stage extraction unit 3, a fourth-stage extraction unit 4, a fifth-stage extraction unit 5, a sixth-stage extraction unit 6, a seventh-stage extraction unit 7, and an eighth-stage extraction unit 8. The first-stage extraction units 1, 2, 3, 4, 5, 6, 7, and 8 are arranged in two rows. The first-stage extraction units 1, 2, 3, and 4 are arranged sequentially from left to right. The fifth-stage extraction units 5, 6, 7, and 8 are arranged sequentially from left to right. The eight extraction units 8 are arranged sequentially from right to left. The closed extraction system for yttrium purification production also includes a fresh extract pipe 11, an aqueous final liquid discharge pipe 12, a first aqueous phase pipe 13, a first extract pipe 14, a second aqueous phase pipe, a second extract pipe 15, a third aqueous phase pipe, a third extract pipe, a fourth aqueous phase pipe, a fourth extract pipe, a fifth aqueous phase pipe, a fifth extract pipe, a sixth aqueous phase pipe, a seventh aqueous phase pipe, a seventh extract pipe, an extract discharge pipe, and a yttrium-containing feed pipe. The fresh extract pipe 11 and the aqueous final liquid discharge pipe 12 are each connected to the first-stage extraction unit 1. One end of the first aqueous phase pipe 13 is connected to the first-stage extraction unit 1, and the other end is connected to the second-stage extraction unit 2. One end of the liquid collection tube 14 is connected to the first-stage extraction unit 1, and the other end is connected to the second-stage extraction unit 2. One end of the second aqueous phase liquid tube is connected to the second-stage extraction unit 2, and the other end is connected to the third-stage extraction unit 3. One end of the second extract liquid tube 15 is connected to the second-stage extraction unit 2, and the other end is connected to the third-stage extraction unit 3. One end of the third aqueous phase liquid tube is connected to the third-stage extraction unit 3, and the other end is connected to the fourth-stage extraction unit 4. One end of the fourth aqueous phase liquid tube is connected to the fourth-stage extraction unit 4, and the other end is connected to the fifth-stage extraction unit 5. One end of the fourth extract liquid tube is connected to the fourth-stage extraction unit 4, and the other end is connected to the fifth-stage extraction unit 5. 5. One end of the fifth aqueous phase liquid pipe is connected to the fifth stage extraction unit 5, and the other end is connected to the sixth stage extraction unit 6. One end of the fifth extract liquid pipe is connected to the fifth stage extraction unit 5, and the other end is connected to the sixth stage extraction unit 6. One end of the sixth aqueous phase liquid pipe is connected to the sixth stage extraction unit 6, and the other end is connected to the seventh stage extraction unit 7. One end of the sixth extract liquid pipe is connected to the sixth stage extraction unit 6, and the other end is connected to the seventh stage extraction unit 7. One end of the seventh aqueous phase liquid pipe is connected to the seventh stage extraction unit 7, and the other end is connected to the eighth stage extraction unit 8. One end of the seventh extract liquid pipe is connected to the seventh stage extraction unit 7, and the other end is connected to the eighth stage extraction unit 8. The extract liquid drain pipe and the yttrium-containing liquid feed pipe are each connected to the eighth stage extraction unit 8.

[0025] Through the arrangement of the extraction units from the first to the eighth stage, and the connection methods of the fresh extract pipe 11, the aqueous final liquid discharge pipe 12, the first aqueous phase pipe 13, the first extract pipe 14, the second aqueous phase pipe, the second extract pipe 15, the third aqueous phase pipe, the third extract pipe, the fourth aqueous phase pipe, the fourth extract pipe, the fifth aqueous phase pipe, the fifth extract pipe, the sixth aqueous phase pipe, the seventh aqueous phase pipe, the seventh extract pipe, the extract discharge pipe, and the yttrium-containing feed pipe, the yttrium-containing feed liquid enters from the eighth stage extraction unit 8, thus achieving multi-stage extraction. Afterwards, the aqueous liquid from which the target component has been extracted leaves the first-stage extraction unit 1 for further processing. Fresh extract enters the first-stage extraction unit 1 to extract and enrich yttrium, enriching it sequentially. Finally, it leaves the eighth-stage extraction unit 8 for washing. After eight enrichments and washing, in this invention, each stage approaches local equilibrium, and the multi-stage series connection results in an overall near-optimal global equilibrium, making it particularly suitable for yttrium extraction. Sufficient contact between the two phases reduces entrainment and backmixing, optimizes the concentration gradient, and maximizes mass transfer driving force, resulting in a final product with yttrium purity of up to 99%. Washing is not required after each extraction, resulting in lower costs and relatively lower energy consumption. Furthermore, this arrangement and tube connection method minimizes floor space, creates a compact layout, and minimizes the sum of the tube lengths.

[0026] In one or more specific embodiments of this utility model, in order to obtain a better purification effect, each extraction unit includes a rectangular box 20. A first baffle 23 is installed on the bottom wall of the rectangular box 20, and a second baffle 24 is installed on the top wall. The first baffle 23 and the second baffle 24 are staggered. The first baffle 23 and the second baffle 24 divide the cavity enclosed by the rectangular box 20 into a mixing chamber 21, a buffer chamber 25 and a clarification chamber 22. The mixing chamber 21 is provided with an extractant inlet 26 and an aqueous inlet 27. The clarification chamber 22 is provided with an organic phase overflow outlet 28 and an aqueous phase outlet 29.

[0027] In one or more specific embodiments of this utility model, in order to obtain better purification effect and avoid or reduce the impact of aqueous phase outflow on the separation of aqueous and organic phases, a third baffle 30 is also installed inside the rectangular box 20. The third baffle 30 is installed on the front and rear walls of the clarification chamber 22. The distance between the third baffle 30 and the aqueous phase outlet 29 is 20-30 cm. The bottom of the third baffle 30 is 5-10 cm lower than the aqueous phase outlet 29, and the top is 2-3 cm higher than the boundary line between the aqueous and organic phases. By setting the third baffle 30, the fluid is prevented from directly rushing towards the aqueous phase outlet 29, ensuring sufficient clarification time, isolating flocculent matter or solid particles at the boundary, preventing them from entering the aqueous or organic phase outlet, reducing turbulence, and enhancing phase separation.

[0028] In one or more specific embodiments of this utility model, in order to obtain a better purification effect, the mixing chamber 21 is equipped with a stirring shaft 31 and a stirring paddle 32 connected to the stirring shaft 31. The upper end of the stirring shaft 31 extends through the top wall of the rectangular box 20 and is connected to a motor. By installing a stirring device, the extraction efficiency is further improved.

[0029] In one or more specific embodiments of this utility model, in order to prolong the residence time, make the two phases more fully contacted, and improve the extraction efficiency, an upper horizontal baffle 34 with a first opening 33 is installed above the agitator 32, and the water inlet 27 is located below the upper horizontal baffle 34.

[0030] In one or more specific embodiments of this utility model, in order to obtain better extraction effect, a lower horizontal baffle 36 with a second opening 35 is installed below the agitator 32. The lower horizontal baffle 36, the first baffle 23, and the bottom of the rectangular box 20 form an auxiliary chamber 37. The water inlet 27 is located below the upper horizontal baffle 34 and above the lower horizontal baffle 36, and the extractant inlet 26 is located below the lower horizontal baffle 36. The auxiliary chamber 37 can improve the mass transfer efficiency by about 5-10%.

[0031] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of this utility model, and are not intended to limit it. Although the utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some or all of the technical features therein. Such modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of this utility model.

Claims

1. A closed extraction system for yttrium purification and production, characterized in that, The system includes first-stage extraction units to eighth-stage extraction units arranged in two rows, with the first-stage to fourth-stage extraction units arranged sequentially from left to right, and the fifth-stage to eighth-stage extraction units arranged sequentially from right to left. It also includes a fresh extract pipe, an aqueous final liquid discharge pipe, first-stage to seventh-stage aqueous phase pipes, first-stage to seventh-stage extract pipes, extract drain pipe, and yttrium-containing feed pipe. The fresh extract pipe and the aqueous final liquid discharge pipe are each connected to the first-stage extraction unit. The extract drain pipe and the yttrium-containing feed pipe are each connected to the eighth-stage extraction unit. Each of the first-stage to seventh-stage aqueous phase pipes has one end connected to an extraction unit and the other end connected to another adjacent extraction unit. In each of the first-stage to seventh-stage extract pipes, one end of each extract pipe is connected to an extraction unit, and the other end is connected to another adjacent extraction unit.

2. The closed extraction system for yttrium purification and production according to claim 1, characterized in that, Each extraction unit includes a rectangular box. A first baffle is installed on the bottom wall of the rectangular box, and a second baffle is installed on the top wall. The first and second baffles are staggered and divide the cavity enclosed by the rectangular box into a mixing chamber, a buffer chamber, and a clarification chamber. The mixing chamber has an extractant inlet and an aqueous inlet, and the clarification chamber has an organic phase overflow outlet and an aqueous phase outlet.

3. The closed extraction system for yttrium purification and production according to claim 2, characterized in that, A third baffle is also installed inside the rectangular box. The third baffle is installed on the front and rear walls of the clarification chamber. The distance between the third baffle and the aqueous phase outlet is 20-30cm. The bottom of the third baffle is 5-10cm lower than the aqueous phase outlet, and the top is 2-3cm higher than the boundary between the aqueous phase and the organic phase.

4. The closed extraction system for yttrium purification and production according to claim 2, characterized in that, The mixing chamber is equipped with a stirring shaft and a stirring paddle connected to the stirring shaft.

5. The closed extraction system for yttrium purification and production according to claim 4, characterized in that, An upper horizontal baffle with a first opening is installed above the agitator, and the water inlet is located below the upper horizontal baffle.

6. The closed extraction system for yttrium purification production according to claim 5, characterized in that, A lower horizontal baffle with a second opening is installed below the agitator. The lower horizontal baffle, together with the first baffle and the bottom of the rectangular box, forms an auxiliary chamber. The water inlet is located below the upper horizontal baffle and above the lower horizontal baffle, while the extractant inlet is located below the lower horizontal baffle.

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