A zirconium-hafnium separation device using organic acid to preferentially extract hafnium

Abstract

This utility model discloses a zirconium-hafnium separation device that utilizes organic acid for preferential extraction of hafnium. The device includes an extraction tower, a feed tank, and an organic acid tank. A base is fixedly connected to the bottom of the extraction tower. A feed inlet and a heavy phase outlet are fixedly connected to the left side of the extraction tower, while an organic acid circulation port and an organic acid inlet are fixedly connected to the right side. A light phase outlet is fixedly connected to the top of the extraction tower. The extraction tower contains a multi-layer plate tower structure and a feed distribution mechanism. The multi-layer plate tower structure includes sieve plates, which are fixedly connected to the inner wall of the extraction tower. The sieve plates have sieve holes. An overflow weir and a baffle are fixedly connected to the sieve plates on both sides of the sieve holes. A downcomer is fixedly connected to the sieve plate to the left of the overflow weir. The downcomer has an opening on the upper side of the sieve plate. There are several sieve plates and downcomers, arranged alternately. The feed distribution mechanism includes a distribution plate with through holes. This structure improves the extraction efficiency of zirconium.

Description

Technical Field

[0001] This utility model relates to the field of extraction device technology, and in particular to a zirconium-hafnium separation device that utilizes organic acids to preferentially extract hafnium. Background Technology

[0002] Zirconium in the Earth's crust exists primarily as zircon (ZrO2) and zircon (ZrSiO4), while hafnium does not exist as a separate mineral; it always occurs in association with zirconium in nature, and there are no standalone hafnium ore deposits. The hafnium content in naturally occurring zirconium is generally 2%–3%. Due to the significant differences in the nuclear properties of zirconium and hafnium, atomic-grade zirconium requires a hafnium content of less than 100 ppm, while atomic-grade hafnium requires a zirconium content of less than 2%. Therefore, zirconium-hafnium separation is necessary.

[0003] Zirconium and hafnium have very similar chemical properties, making them extremely difficult to separate. Currently, extraction devices are mainly used to separate zirconium and hafnium, but existing extraction devices still have shortcomings:

[0004] 1. The raw materials need to be extracted and then fractionated. The process of transferring the raw materials is relatively complicated and affects the efficiency of zirconium-hafnium extraction.

[0005] 2. During extraction, the raw material is prone to uneven mixing with the extract, resulting in poor zirconium extraction effect. Utility Model Content

[0006] The purpose of this invention is to provide a zirconium-hafnium separation device that utilizes organic acids to preferentially extract hafnium, thereby solving the problems mentioned above.

[0007] To achieve the above objectives, a zirconium-hafnium separation device using organic acid for preferential extraction of hafnium is provided, comprising an extraction tower, a feed storage tank, and an organic acid storage tank. A base is fixedly connected to the bottom of the extraction tower. A feed inlet and a heavy phase outlet are fixedly connected to the left side of the extraction tower, and an organic acid circulation port and an organic acid inlet are fixedly connected to the right side. A light phase outlet is fixedly connected to the top of the extraction tower. The extraction tower is equipped with a multi-layer plate tower structure and a feed distribution mechanism.

[0008] The multi-layer plate tower mechanism includes a sieve plate, which is fixedly connected to the inner wall of the extraction tower around its perimeter. The sieve plate is provided with sieve holes. An overflow weir and a baffle are fixedly connected to the sieve plate on both sides of the sieve holes, respectively. A downcomer is fixedly connected to the sieve plate on the left side of the overflow weir. An opening is provided on the downcomer located on the upper side of the sieve plate. There are several sieve plates and downcomers, which are arranged alternately. The liquid distribution mechanism includes a distribution plate, which is provided with through holes.

[0009] According to the zirconium-hafnium separation device that utilizes organic acid to preferentially extract hafnium, a feed pipe is fixedly connected between the feed storage tank and the feed inlet, and a feed pump is connected to the feed pipe.

[0010] According to the zirconium-hafnium separation device that utilizes organic acid to preferentially extract hafnium, an organic acid feed pipe is fixedly connected between the organic acid storage tank and the organic acid inlet. An organic acid feed pump and a flow meter are connected to the organic acid feed pipe, with the flow meter located on the side near the organic acid inlet.

[0011] According to the zirconium-hafnium separation device that utilizes organic acid to preferentially extract hafnium, an organic acid circulation pipe is fixedly connected between the organic acid circulation port and the organic acid feed pipe, and an organic acid circulation pump and an industrial heating jacket are connected to the organic acid circulation pipe, with the industrial heating jacket located above the organic acid circulation pump.

[0012] According to the zirconium-hafnium separation device that utilizes organic acid to preferentially extract hafnium, the organic acid feed pipe located to the left of the flow meter is connected to the upper end of the organic acid circulation pipe.

[0013] According to the zirconium-hafnium separation device that utilizes organic acid to preferentially extract hafnium, the feed liquid inlet is located above the heavy phase outlet, and the organic acid circulation port is located below the organic acid inlet.

[0014] According to the zirconium-hafnium separation device that utilizes organic acids to preferentially extract hafnium, the heavy phase outlet is externally connected to a heavy phase separator.

[0015] According to the zirconium-hafnium separation device that utilizes organic acids to preferentially extract hafnium, the light phase outlet is externally connected to a light phase separator.

[0016] This utility model has the following beneficial effects:

[0017] 1. Compared with the existing technology, the extraction tower is equipped with a liquid feed inlet, a heavy phase outlet, a light phase outlet, an organic acid circulation port, and an organic acid feed inlet. The organic acid is drawn from the organic acid storage tank by the organic acid feed pump and injected into the extraction tower. It then falls onto the equalization plate at the bottom of the extraction tower. The liquid feed pump is then started to draw the liquid from the liquid storage tank and enter the extraction tower through the liquid feed pipe, so that the liquid is evenly sprayed on the organic acid at the bottom of the extraction tower. By utilizing the difference in interaction forces between the organic phase and the aqueous phase, as well as the difference in the distribution of zirconium and hafnium in the extractant, zirconium and hafnium are extracted into the organic phase and the aqueous phase respectively. Then, zirconium and hafnium are separated by different extractants or by adjusting the extraction conditions.

[0018] 2. Compared with existing technologies, by incorporating a multi-layer plate tower structure and a feed distribution mechanism within the extraction tower, the feed liquid and organic acid are evenly distributed at the bottom of the extraction tower, avoiding local overflow or flow deviation, thereby improving the separation effect of zirconium and hafnium. Attached Figure Description

[0019] The present invention will be further described below with reference to the accompanying drawings and embodiments;

[0020] Figure 1 This is a structural diagram of a zirconium-hafnium separation device that utilizes organic acids to preferentially extract hafnium according to this utility model;

[0021] Figure 2 This is a cross-sectional view of a zirconium-hafnium separation device that utilizes organic acids to preferentially extract hafnium according to this utility model;

[0022] Figure 3 This is a structural diagram of a multi-layer plate tower mechanism for a zirconium-hafnium separation device that utilizes organic acids to preferentially extract hafnium according to this utility model.

[0023] Figure 4 This is a structural diagram of the feed liquid distribution mechanism of a zirconium-hafnium separation device that utilizes organic acids to preferentially extract hafnium according to this utility model.

[0024] Legend:

[0025] 1. Extraction tower; 11. Feed inlet; 12. Heavy phase outlet; 13. Light phase outlet; 14. Organic acid circulation port; 15. Organic acid inlet; 2. Base; 3. Multi-layer plate tower structure; 31. Sieve plate; 32. Sieve holes; 33. Downcomer; 331. Opening; 34. Overflow weir; 35. Baffle; 4. Feed storage tank; 5. Organic acid storage tank; 6. Feed pump; 61. Feed pipe; 7. Organic acid circulation pump; 71. Organic acid circulation pipe; 72. Industrial heating jacket; 8. Organic acid feed pump; 81. Organic acid feed pipe; 82. Flow meter; 9. Feed distribution mechanism; 91. Distribution plate; 92. Through hole. Detailed Implementation

[0026] This section will describe in detail the specific embodiments of the present utility model. The preferred embodiments of the present utility model are shown in the accompanying drawings. The purpose of the drawings is to supplement the textual description with graphics, so that people can intuitively and vividly understand each technical feature and the overall technical solution of the present utility model, but they should not be construed as limiting the scope of protection of the present utility model.

[0027] Reference Figure 1-4This utility model discloses a zirconium-hafnium separation device that utilizes organic acids for preferential extraction of hafnium. It includes an extraction tower 1, a feed liquid storage tank 4, and an organic acid storage tank 5. All three are made of corrosion-resistant stainless steel. A base 2 is fixedly connected to the bottom of the extraction tower 1. A feed liquid inlet 11 and a heavy phase outlet 12 are fixedly connected to the left side of the extraction tower 1, and an organic acid circulation port 14 and an organic acid inlet 15 are fixedly connected to the right side. Each of the feed liquid inlet 11, heavy phase outlet 12, light phase outlet 13, organic acid circulation port 14, and organic acid inlet 15 is equipped with... The extraction tower 1 has a valve, a liquid inlet 11 located above the heavy phase outlet 12, an organic acid circulation port 14 located below the organic acid inlet 15, and a heavy phase separator connected to the heavy phase outlet 12. The structure and working principle of the heavy phase separator are similar to those of the light phase separator. The separated aqueous phase can be further processed or discharged. A light phase outlet 13 is fixedly connected to the upper end of the extraction tower 1. A light phase separator is connected to the light phase outlet 13. The light phase separator can use gravity sedimentation or centrifugal separation to separate the organic phase and aqueous phase into layers, which are then collected separately. The extraction tower 1 is equipped with a multi-layer plate tower mechanism 3 and a liquid distribution mechanism 9.

[0028] A feed pipe 61 is fixedly connected between the liquid storage tank 4 and the liquid inlet 11. A feed pump 6, which is a corrosion-resistant centrifugal pump, is connected to the feed pipe 61. An organic acid feed pipe 81 is fixedly connected between the organic acid storage tank 5 and the organic acid inlet 15. An organic acid feed pump 8 and a flow meter 82 are connected to the organic acid feed pipe 81, with the flow meter 82 located near the organic acid inlet 15. An organic acid circulation pipe 71 is fixedly connected between the organic acid circulation port 14 and the organic acid feed pipe 81. An organic acid circulation tube 71 is connected to the organic acid circulation pipe 71. The ring pump 7 and the industrial heating jacket 72 are located on the upper side of the organic acid circulating pump 7. The organic acid feed pipe 81 located to the left of the flow meter 82 is connected to the upper end of the organic acid circulating pipe 71. After the feed liquid and organic acid fall into the extraction tower 1, under the action of the multi-layer plate tower mechanism 3 and the feed liquid distribution mechanism 9, they are made to contact more fully. By utilizing the difference in interaction force between the organic phase and the aqueous phase, as well as the difference in the distribution of zirconium and hafnium in the extractant, zirconium and hafnium are extracted into the organic phase and the aqueous phase respectively. Then, zirconium and hafnium are separated by different extractants or by adjusting the extraction conditions.

[0029] The feed pipe 61, the organic acid circulation pipe 71 and the organic acid feed pipe 81 are all one-way pipes. During the extraction process, the mixed liquid at the bottom of the extraction tower 1 can be extracted by the organic acid circulation pump 7 and injected back into the extraction tower 1 for multiple fusions. Under the heating of the industrial heating jacket 72, the extraction efficiency is improved or the physical properties of the organic phase are improved.

[0030] The multi-layer plate tower mechanism 3 includes a sieve plate 31, which is fixedly connected to the inner wall of the extraction tower 1. The sieve plate 31 is provided with sieve holes 32. An overflow weir 34 and a baffle 35 are fixedly connected to the sieve plate 31 on both sides of the sieve holes 32. Under the action of the overflow weir 34 and the baffle 35, the phenomenon of local overflow or deviated flow of the feed liquid and organic liquid on the sieve plate 31 is avoided, which further improves the separation effect of zirconium and hafnium. A downcomer 33 is fixedly connected to the sieve plate 31 on the left side of the overflow weir 34. An opening 331 is provided on the downcomer 33 on the upper side of the sieve plate 31. There are several sieve plates 31 and downcomers 33, which are staggered. The feed liquid distribution mechanism 9 includes a distribution plate 91, which is provided with through holes 92.

[0031] Working principle: When using, first check whether each part of the device is intact, whether the connection is firm, and whether the valve is open or closed correctly;

[0032] Start the organic acid feed pump 8 to draw the organic acid from the organic acid storage tank 5 and inject it into the extraction tower 1 through the organic acid feed pipe 81 and the flow meter 82. Under the action of the multi-layer plate tower mechanism 3, it falls onto the equalization plate 91 at the bottom of the extraction tower 1. Then start the liquid feed pump 6 to draw the liquid from the liquid storage tank 4 and enter the extraction tower 1 through the liquid feed pipe 61. Under the action of the multi-layer plate tower mechanism 3 and the liquid distribution mechanism 9, the liquid is evenly sprayed onto the organic acid at the bottom of the extraction tower 1.

[0033] Inside the extraction tower 1, hafnium in the feed solution undergoes an extraction reaction with organic acids and preferentially transfers to the organic phase, while zirconium remains in the aqueous phase. The two phases flow countercurrently in the extraction tower 1. After multi-stage extraction, the hafnium-rich organic phase is discharged from the light phase outlet 13 at the top of the tower, while the zirconium-containing aqueous phase is discharged from the heavy phase outlet 12 at the bottom of the tower.

[0034] The embodiments of the present utility model have been described in detail above with reference to the accompanying drawings. However, the present utility model is not limited to the above embodiments. Within the scope of knowledge possessed by those skilled in the art, various changes can be made without departing from the spirit of the present utility model.

Claims

1. A zirconium-hafnium separation device that utilizes organic acids for preferential extraction of hafnium, characterized in that, The extraction tower (1) includes an extraction tower (1), a liquid storage tank (4), and an organic acid storage tank (5). The bottom of the extraction tower (1) is fixedly connected to a base (2). The left side of the extraction tower (1) is fixedly connected to a liquid inlet (11) and a heavy phase outlet (12), and the right side is fixedly connected to an organic acid circulation port (14) and an organic acid inlet (15). The upper end of the extraction tower (1) is fixedly connected to a light phase outlet (13). The extraction tower (1) is equipped with a multi-layer plate tower mechanism (3) and a liquid distribution mechanism (9). The multi-layer plate tower mechanism (3) includes a sieve plate (31), which is fixedly connected to the inner wall of the extraction tower (1) around its perimeter. The sieve plate (31) is provided with sieve holes (32). An overflow weir (34) and a baffle (35) are fixedly connected to the sieve plate (31) on both sides of the sieve holes (32). A downcomer (33) is fixedly connected to the sieve plate (31) on the left side of the overflow weir (34). An opening (331) is provided on the downcomer (33) on the upper side of the sieve plate (31). There are several sieve plates (31) and downcomers (33), which are staggered. The liquid distribution mechanism (9) includes a distribution plate (91), which is provided with through holes (92).

2. The zirconium-hafnium separation device for preferential extraction of hafnium using organic acids according to claim 1, characterized in that, A liquid inlet pipe (61) is fixedly connected between the liquid storage tank (4) and the liquid inlet (11), and a liquid inlet pump (6) is connected to the liquid inlet pipe (61).

3. The zirconium-hafnium separation device for preferential extraction of hafnium using organic acids according to claim 2, characterized in that, An organic acid feed pipe (81) is fixedly connected between the organic acid storage tank (5) and the organic acid inlet (15). An organic acid feed pump (8) and a flow meter (82) are connected to the organic acid feed pipe (81). The flow meter (82) is located on the side close to the organic acid inlet (15).

4. The zirconium-hafnium separation device for preferential extraction of hafnium using organic acids according to claim 3, characterized in that, An organic acid circulation pipe (71) is fixedly connected between the organic acid circulation port (14) and the organic acid feed pipe (81). An organic acid circulation pump (7) and an industrial heating jacket (72) are connected to the organic acid circulation pipe (71). The industrial heating jacket (72) is located on the upper side of the organic acid circulation pump (7).

5. The zirconium-hafnium separation device for preferential extraction of hafnium using organic acids according to claim 4, characterized in that, The organic acid feed pipe (81) located to the left of the flow meter (82) is connected to the upper end of the organic acid circulation pipe (71).

6. The zirconium-hafnium separation device for preferential extraction of hafnium using organic acids according to claim 5, characterized in that, The liquid feed inlet (11) is located above the heavy phase outlet (12), and the organic acid circulation port (14) is located below the organic acid feed inlet (15).

7. A zirconium-hafnium separation device for preferential extraction of hafnium using organic acids according to claim 6, characterized in that, The heavy phase outlet (12) is connected to an external heavy phase separator.

8. A zirconium-hafnium separation device for preferential extraction of hafnium using organic acids according to claim 7, characterized in that, The light phase outlet (13) is connected to an external light phase separator.

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