Catalyst adding device for recovery reaction of rare metals in cyaniding waste liquid

Abstract

The invention relates to the technical field of waste liquid recovery, and discloses a catalyst adding device for recovery reaction of rare metals in cyaniding waste liquid, the catalyst adding device comprises a waste liquid treatment device, the waste liquid treatment device comprises a treatment tank and a tank cover, the tank cover is also provided with a catalyst adding port, and a catalyst can be added into the treatment tank through the catalyst adding port. Rare metals in the waste liquid are recycled; and the catalyst adding unit is used for controlling the adding amount of the catalyst in the catalyst adding port. Through the arrangement of the catalyst adding unit, when a first blocking plate moves to extrude a second piston rod, gas is conducted through a hose to push a first piston rod, and a spline shaft is promoted to drive a movable shaft and a dispersion disc to act. At the moment, the dispersing disc is separated from the discharging opening, the discharging opening is opened, the rotating dispersing disc is matched with the splitter, and the quantitatively-output catalyst is evenly scattered, so that the situation that the local concentration of the catalyst is not uniform is avoided, and the recovery efficiency and purity of rare metal are greatly improved.

Description

Technical Field

[0001] The invention relates to the technical field of waste liquid recovery, and more specifically to a catalyst adding device for rare metal recovery reaction in cyanide waste liquid. Background Art

[0002] Wastewater treatment is a commonly used technical means in modern construction operations. By treating harmful substances in wastewater, the discharge of wastewater will not cause environmental pollution and uncontrolled escape of harmful substances. Cyanide waste liquid is a highly hazardous industrial wastewater. Cyanide waste liquid mainly comes from gold mining, electroplating, metal surface treatment and other industries. In these production processes, cyanide is widely used in ore leaching, metal complexation and other processes, thus producing a large amount of waste liquid containing cyanide. Cyanide waste liquid contains a variety of rare metals such as gold, silver, platinum, palladium, etc. It has high economic value and is widely used in high-tech fields such as electronics, aerospace, and new energy.

[0003] Currently, the recovery of rare metals from cyanide wastewater mainly adopts chemical precipitation, ion exchange, adsorption and membrane separation, but these methods have problems such as low recovery rate, high cost and serious secondary pollution. In order to improve the recovery efficiency of rare metals, introducing catalysts in the recovery reaction has become an effective solution.

[0004] In the process of recovering rare metals from cyanide waste liquid, if the catalyst is added unevenly and the catalyst concentration in some areas is too high, it will cause catalyst waste, increase costs, and may also trigger side reactions, affecting the purity of rare metal recovery; if the catalyst concentration in some areas is too low, the reaction rate will slow down and reduce the efficiency of rare metal recovery.

[0005] Specifically, catalysts are mostly in granular form. Powdered catalysts have large specific surface area and high surface energy. The particles are easily aggregated into large particles due to electrostatic attraction. After entering the treatment tank, it is difficult to disperse evenly in a short time, resulting in local concentration differences. In addition, different catalysts have different fluidity. Some catalysts have irregular particle shapes, uneven particle size distribution, and poor fluidity. They are easily accumulated in pipes and discharge ports during transportation and addition, resulting in poor discharge or unstable quantity, affecting the uniformity of addition. Summary of the invention

[0006] The invention provides a catalyst adding device for rare metal recovery reaction in cyanide waste liquid, which solves the technical problems in the related art that in the process of rare metal recovery in cyanide waste liquid, if the catalyst is added unevenly, the catalyst concentration in some areas is too high, which will cause catalyst waste, increase costs, and may also induce side reactions, affecting the purity of rare metal recovery; while if the catalyst concentration in some areas is too low, the reaction rate will be slowed down, reducing the rare metal recovery efficiency.

[0007] The invention discloses a catalyst adding device for rare metal recovery reaction in cyanide waste liquid, comprising a waste liquid treatment device, wherein the waste liquid treatment device comprises a treatment tank and a tank cover, wherein the tank cover is also provided with a catalyst adding port, through which catalyst can be added to the inside of the treatment tank to recover the rare metals in the waste liquid; a catalyst adding unit is used to control the amount of catalyst added inside the catalyst adding port; the catalyst adding unit comprises a discharge port installed on the catalyst adding port, and a feeding hopper is installed on the discharge port, a feed box is installed on the feed hopper, and a feeding hopper is installed on the feed box, a pad is installed inside the feed box, and the pad is fixedly connected to the feeding hopper, and two groups of first blocking plates are arranged inside the feed box, and a containing space for containing catalyst raw materials is formed between the two groups of the first blocking plates.

[0008] As a further optimization scheme of the present invention, a second motor is installed on the feed box, and a threaded rod is installed on the output shaft of the second motor. A threaded sleeve is threadedly connected to the threaded rod, and both ends of the threaded sleeve are connected to the first sealing plate.

[0009] As a further optimization solution of the present invention, a dispersing unit is provided on the discharge port to disperse the catalyst so that it is evenly dispersed inside the treatment tank.

[0010] As a further optimization scheme of the present invention, the dispersion unit includes a movable shaft arranged inside the discharge port, and a dispersion disk is installed at one end of the movable shaft close to the processing tank, the dispersion disk is arranged in a conical structure, and a conical groove matched with the dispersion disk is opened at the open position of the discharge port, and the dispersion disk is used to close the open position of the discharge port.

[0011] As a further optimization scheme of the present invention, the outer part of the movable shaft is slidably connected with a sliding sleeve, and the sliding sleeve is installed on the discharge port, the discharge port is also installed with a first connecting frame, and the interior of the first connecting frame is rotatably connected with a sleeve through a bearing, the interior of the sleeve is slidably connected with a spline shaft, and the spline shaft and the movable shaft are fixedly connected, the first connecting frame is installed with a third motor, and the output shaft of the third motor is installed with a first gear, the first gear is meshingly connected with a second gear, and the second gear is installed on the sleeve.

[0012] As a further optimization scheme of the present invention, a second connecting frame is also installed on the first connecting frame, and a first connecting cylinder is installed on the second connecting frame, a first piston rod is slidably connected inside the first connecting cylinder, and a connecting block is installed at one end of the first piston rod away from the first connecting cylinder, the connecting block is rotatably connected to the spline shaft through a bearing, a first spring is provided on the first piston rod, a second connecting cylinder is installed on the feed box, and a second piston rod is slidably connected inside the second connecting cylinder, an end of the second piston rod away from the second connecting cylinder passes through the feed box and extends to the interior of the feed box, a second spring is provided on the second piston rod, and a hose is installed between the first connecting cylinder and the second connecting cylinder to connect the interiors of the first connecting cylinder and the second connecting cylinder through the hose.

[0013] As a further optimization solution of the present invention, a plurality of diverter plates are evenly distributed in a ring shape on the dispersion disk, and each diverter plate is provided with a notch matched with the open portion of the discharge port.

[0014] As a further optimization scheme of the present invention, the feed box is provided with an opening adapted to the feeding hopper, the feed box and the interior of the feeding hopper are connected through the opening, a closing unit is provided inside the opening, and the closing unit is used to isolate the catalyst inside the feeding hopper.

[0015] As a further optimization scheme of the present invention, the closing unit includes a second sealing plate slidably connected to the opening, and a guide frame is installed on the second sealing plate, a guide rod is slidably connected to the inside of the guide frame, and one end of the guide rod away from the guide frame is fixedly connected to the outer wall of the feed box, and a third spring is provided on the guide rod.

[0016] As a further optimization solution of the present invention, a blocking block is installed on the second blocking plate, a movable groove matched with the second blocking plate is provided in the opening, and a notch for accommodating the blocking block is provided in the movable groove.

[0017] The beneficial effect of the present invention is that the present invention quantitatively delivers the catalyst to the feeding hopper through the catalyst adding unit. When the first blocking plate moves and squeezes the second piston rod, the gas is conducted through the hose to push the first piston rod, prompting the spline shaft to drive the movable shaft and the dispersion disk to move. At this time, the dispersion disk is separated from the discharge port, the discharge port is opened, and the rotating dispersion disk cooperates with the diverter plate to evenly spread the quantitatively output catalyst, thereby avoiding uneven local concentration of the catalyst, ensuring the concentration required for the reaction, and preventing waste, greatly improving the recovery efficiency and purity of rare metals. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 The three-dimensional structure of the present invention is shown in FIG. Figure 1 ;

[0019] Figure 2 The three-dimensional structure of the present invention is shown in FIG. Figure 2 ;

[0020] Figure 3 It is a schematic cross-sectional view of the structure of the present invention;

[0021] Figure 4 It is a schematic diagram of a partial three-dimensional structure of the present invention;

[0022] Figure 5 It is a schematic diagram of the three-dimensional structure of the catalyst adding unit, the dispersing unit and the enclosing unit of the present invention;

[0023] Figure 6 It is a schematic diagram of the internal three-dimensional structure of the catalyst addition unit of the present invention;

[0024] Figure 7 It is a schematic diagram of the three-dimensional structure of the dispersed unit of the present invention;

[0025] Figure 8 It is a schematic diagram of a partial three-dimensional structure of a dispersed unit of the present invention;

[0026] Fig. 9 The present invention Figure 5 Schematic diagram of the structure section;

[0027] Fig.10 The present invention Fig. 9 A magnified view of the structure at center;

[0028] Fig.11 The present invention Fig. 9 Enlarged view of the structure at point B in the middle.

[0029] In the figure: 100, waste liquid treatment device; 101, base; 102, treatment tank; 103, tank cover; 104, first motor; 105, connecting shaft; 106, blade; 107, catalyst addition port; 108, first connecting pipe; 109, lifting pump; 110, second connecting pipe; 111, third connecting pipe; 112, fourth connecting pipe; 200, catalyst addition unit; 201, discharge port; 202, feeding hopper; 203, feed box; 204, hopper; 205, pad; 206, second motor; 207, threaded rod; 208, threaded sleeve; 209, first blocking plate; 300, dispersion unit; 301, movable shaft; 302, dispersion disk ; 303, sleeve; 304, first connecting frame; 305, bushing; 306, spline shaft; 307, third motor; 308, first gear; 309, second gear; 310, second connecting frame; 311, first connecting cylinder; 312, first piston rod; 313, connecting block; 314, first spring; 315, first exhaust port; 316, second connecting cylinder; 317, second piston rod; 318, second spring; 319, second exhaust port; 320, hose; 321, diverter; 400, closing unit; 401, second blocking plate; 402, guide rod; 403, third spring; 404, blocking block; 405, limit block; 406, limit groove. DETAILED DESCRIPTION

[0030] The subject matter described herein will now be discussed with reference to example implementations. It should be understood that the discussion of these implementations is only to enable those skilled in the art to better understand and implement the subject matter described herein, and the functions and arrangements of the elements discussed may be changed without departing from the scope of protection of the contents of this specification. Various examples may omit, replace, or add various processes or components as needed. In addition, the features described in some examples may also be combined in other examples.

[0031] according to Figure 1 , Figure 2 , Figure 3 and Figure 4As shown, a catalyst adding device for rare metal recovery reaction in cyanide waste liquid comprises a waste liquid treatment device 100, the waste liquid treatment device 100 comprises a base 101, and a treatment tank 102 is installed on the base 101, a tank cover 103 is detachably installed on the treatment tank 102, and a first motor 104 is installed on the tank cover 103, a connecting shaft 105 is provided inside the treatment tank 102, and a plurality of blades 106 are installed at one end of the connecting shaft 105 away from the tank cover 103, and an end of the connecting shaft 105 close to the tank cover 103 is fixedly connected to the output shaft of the first motor 104, and a catalyst adding port 107 is also installed on the tank cover 103, so as to add catalyst to the inside of the treatment tank 102 through the catalyst adding port 107, so as to recover the rare metals in the cyanide waste liquid.

[0032] Specifically, the catalyst adding device also includes a first connecting pipe 108, a lifting pump 109, a second connecting pipe 110, a third connecting pipe 111 and a fourth connecting pipe 112. The first connecting pipe 108 is installed on the treatment tank 102, the lifting pump 109 is installed on the base 101, and the lifting pump 109 is provided with an input end and an output end. The second connecting pipe 110 is installed at the input end of the lifting pump 109, and the third connecting pipe 111 is installed at the output end of the lifting pump 109. The end of the second connecting pipe 110 away from the lifting pump 109 is connected to the treatment tank 102, and the fourth connecting pipe 112 is installed at the bottom of the treatment tank 102.

[0033] In this embodiment, the first connecting pipe 108 can be connected to an external cyanide waste liquid water source to supply liquid to the inside of the treatment tank 102, so as to facilitate the waste liquid treatment device 100 to continuously treat the cyanide waste liquid; the lifting pump 109, the second connecting pipe 110 and the third connecting pipe 111 can extract the flocs or precipitates after the reaction with the catalyst inside the treatment tank 102, so as to facilitate the recovery of rare metals in the cyanide waste liquid; the fourth connecting pipe 112 can be connected to an external sewage pipe, so as to facilitate the cleaning of the inside of the treatment tank 102.

[0034] It should be understood that when the first motor 104 is controlled to rotate, the connecting shaft 105 rotates synchronously to drive the plurality of blades 106 to mix the cyanide waste liquid and the catalyst inside the treatment tank 102, thereby facilitating the recovery of rare metals in the cyanide waste liquid and improving the waste liquid recovery efficiency.

[0035] according to Figure 5 and Figure 6 As shown, the catalyst adding port 107 is provided with a catalyst adding unit 200 for controlling the amount of catalyst added inside the catalyst adding port 107, thereby reducing the cost of catalyst usage and facilitating the recovery of rare metals in the cyanide waste liquid.

[0036] according to Figure 6 As shown, the catalyst addition unit 200 includes a discharge port 201 installed on the catalyst addition port 107, and a feeding hopper 202 is installed on the discharge port 201, a feed box 203 is installed on the feed hopper 202, and a charging hopper 204 is installed on the feed box 203, an opening adapted to the charging hopper 204 is opened on the feed box 203, the interiors of the feed box 203 and the charging hopper 204 are connected through the opening, and a pad 205 is installed inside the feed box 203. The pad 205 is fixedly connected to the feeding hopper 202, a second motor 206 is installed on the feed box 203, and a threaded rod 207 is installed on the output shaft of the second motor 206. The threaded rod 207 is rotatably connected to the inner wall of the feed box 203 through a bearing, a threaded sleeve 208 is threadedly connected to the threaded rod 207, and first sealing plates 209 are provided at both ends of the threaded sleeve 208, and a accommodating space for accommodating catalyst raw materials is formed between the two groups of first sealing plates 209.

[0037] Furthermore, when the second motor 206 is controlled to rotate, the threaded rod 207 rotates synchronously, and the threaded connection between the threaded rod 207 and the threaded sleeve 208 drives the first sealing plate 209 to move inside the feed box 203 to form a movable accommodating space, thereby driving the catalyst in the accommodating space to move synchronously, so that the catalyst moves toward the feeding hopper 202, and a certain amount of catalyst is delivered to the feeding hopper 202, and the catalyst is delivered to the discharge port 201 through the feeding hopper 202, so as to control the amount of catalyst added and add the catalyst. This quantitative addition method avoids excessive use of the catalyst and reduces the cost of the catalyst. At the same time, it also ensures the stability of the catalyst concentration during the reaction, which is beneficial to improving the recovery effect of rare metals.

[0038] according to Figure 5 As shown, a dispersing unit 300 is provided on the discharge port 201 for dispersing the catalyst so that the catalyst is evenly dispersed inside the treatment tank 102, so as to facilitate the recovery of rare metals in the cyanide waste liquid.

[0039] according to Figure 7 and Figure 8 As shown, the dispersion unit 300 includes a movable shaft 301 arranged inside the discharge port 201, and a dispersion disk 302 is installed at one end of the movable shaft 301 close to the processing tank 102. The dispersion disk 302 is arranged in a conical structure, and a conical groove matched with the dispersion disk 302 is opened at the open position of the discharge port 201. The dispersion disk 302 is used to close the open position of the discharge port 201.

[0040] Specifically, the outer part of the movable shaft 301 is slidably connected with a sleeve 303, and the sleeve 303 is installed on the discharge port 201. The discharge port 201 is also installed with a first connecting frame 304, and the interior of the first connecting frame 304 is rotatably connected with a sleeve 305 through a bearing, the interior of the sleeve 305 is slidably connected with a spline shaft 306, and the spline shaft 306 and the movable shaft 301 are fixedly connected, a third motor 307 is installed on the first connecting frame 304, and a first gear 308 is installed at the output shaft of the third motor 307, the first gear 308 is meshingly connected with a second gear 309, and the second gear 309 is installed on the sleeve 305.

[0041] In this embodiment, when the third motor 307 is controlled to rotate, the first gear 308 and the second gear 309 are meshed and connected to drive the sleeve 305 to rotate synchronously. Through the action of the sliding limit between the sleeve 305 and the spline shaft 306, the movable shaft 301 rotates synchronously. When the movable shaft 301 rotates, the dispersion disk 302 rotates synchronously, thereby facilitating the movement of the catalyst inside the discharge port 201 to make the catalyst evenly distributed.

[0042] Furthermore, a second connecting frame 310 is also installed on the first connecting frame 304, and a first connecting cylinder 311 is installed on the second connecting frame 310, a first piston rod 312 is slidably connected inside the first connecting cylinder 311, and a connecting block 313 is installed at one end of the first piston rod 312 away from the first connecting cylinder 311, the connecting block 313 and the spline shaft 306 are rotatably connected via a bearing, a first spring 314 is provided on the first piston rod 312, one end of the first spring 314 is fixedly connected to the first connecting cylinder 311, and the other end of the first spring 314 is fixedly connected to the connecting block 313, and a first exhaust port 315 is opened inside the first connecting cylinder 311.

[0043] In addition, a second connecting cylinder 316 is installed on the feed box 203, and a second piston rod 317 is slidably connected inside the second connecting cylinder 316. One end of the second piston rod 317 away from the second connecting cylinder 316 passes through the feed box 203 and extends to the inside of the feed box 203. A second spring 318 is provided on the second piston rod 317. One end of the second spring 318 is fixedly connected to the inner wall of the feed box 203, and the other end of the second spring 318 is fixedly connected to the second piston rod 317. A second exhaust port 319 is opened inside the second connecting cylinder 316.

[0044] Similarly, a hose 320 is installed between the first connecting tube 311 and the second connecting tube 316 , and the interior of the first connecting tube 311 and the interior of the second connecting tube 316 can be connected through the hose 320 .

[0045] It should be noted that according to Fig. 9 and Fig.10 As shown, when the first sealing plate 209 moves toward the position of the second piston rod 317 and squeezes the second piston rod 317, the first sealing plate 209 pushes the second piston rod 317 to move into the second connecting cylinder 316. At this time, the second spring 318 produces elastic deformation. When the second piston rod 317 moves inside the second connecting cylinder 316, the gas inside the second connecting cylinder 316 is transported to the first connecting cylinder 311 through the hose 320, thereby driving the first piston rod 312 to move, and driving the connecting block 313 to move synchronously, so that the first spring 314 produces elastic deformation, and the spline shaft 306 moves up and down inside the sleeve 305, thereby separating the discharge port 201 from the dispersion disk 302, so that the open part of the discharge port 201 is completely exposed, and the catalyst is evenly spread through the rotation of the dispersion disk 302.

[0046] It should be noted that a plurality of flow dividers 321 are evenly distributed in an annular shape on the dispersion disk 302, and each flow divider 321 is provided with a notch that matches the open portion of the discharge port 201. Among them, through the arrangement of the flow dividers 321, the rotating dispersion disk 302 can move the catalyst inside the discharge port 201, break the agglomeration of the catalyst, and make the catalyst preliminarily dispersed before entering the treatment tank 102, which is conducive to the uniform distribution of the catalyst in the treatment tank 102, eliminates agglomeration and clustering, and improves the uniformity of catalyst addition.

[0047] according to Figure 5 and Figure 6 As shown, a sealing unit 400 is provided inside the opening, and the sealing unit 400 is used to isolate the catalyst inside the hopper 204 to prevent the catalyst from entering the area outside the containing space.

[0048] according to Fig.11 As shown, the closing unit 400 includes a second sealing plate 401 slidably connected to the opening, and a guide frame is installed on the second sealing plate 401, a guide rod 402 is slidably connected inside the guide frame, and one end of the guide rod 402 away from the guide frame is fixedly connected to the outer wall of the feed box 203, a third spring 403 is provided on the guide rod 402, one end of the third spring 403 is fixedly connected to the guide frame, and the other end of the third spring 403 is fixedly connected to the guide rod 402.

[0049] Specifically, a blocking block 404 is installed on the second blocking plate 401, a movable groove adapted to the second blocking plate 401 is opened in the opening, and a notch for accommodating the blocking block 404 is opened in the movable groove. The initial state of the first blocking plate 209 is based on Fig.11 As shown, when the first blocking plate 209 is in the initial state, it is used to limit the blocking block 404.

[0050] Furthermore, a limiting block 405 is installed at one end of the second blocking plate 401 away from the guide frame, and a limiting groove 406 is provided on the side of the opening away from the movable groove. When the first blocking plate 209 is in a moving state, the limiting of the blocking block 404 is released, and at this time, the limiting block 405 moves toward the position of the limiting groove 406, so that the limiting block 405 and the limiting groove 406 are engaged and connected, and the opening is closed, thereby sealing the feed box 203 and the hopper 204; when the first blocking plate 209 is reset, it is engaged with the blocking block 404, so that the second blocking plate 401 is reset in the movable groove, and the notch is engaged with the blocking block 404 again.

[0051] An example of the present specific implementation mode is described above, but the present embodiment is not limited to the above-mentioned specific implementation mode, which is merely illustrative and not restrictive. A person skilled in the art may make many forms inspired by the present embodiment, all of which are protected by the present embodiment.

Claims

1. A catalyst adding device for rare metal recovery reaction in cyanide waste liquid, characterized in that: include: A waste liquid treatment device (100), the waste liquid treatment device (100) comprising a treatment tank (102) and a tank cover (103), the tank cover (103) being further provided with a catalyst adding port (107) so as to add a catalyst into the treatment tank (102) through the catalyst adding port (107) to recover rare metals in the waste liquid; A catalyst adding unit (200) for controlling the amount of catalyst added inside the catalyst adding port (107); The catalyst addition unit (200) comprises a discharge port (201) installed on the catalyst addition port (107), and a feeding hopper (202) is installed on the discharge port (201), a feed box (203) is installed on the feed hopper (202), and a charging hopper (204) is installed on the feed box (203), a pad (205) is installed inside the feed box (203), and the pad (205) is fixedly connected to the feed hopper (202), and two groups of first blocking plates (209) are provided inside the feed box (203), and a accommodating space for accommodating catalyst raw materials is formed between the two groups of the first blocking plates (209).

2. The catalyst adding device for rare metal recovery reaction in cyanide waste liquid according to claim 1, characterized in that: The feed box (203) is mounted with a second motor (206), and the output shaft of the second motor (206) is mounted with a threaded rod (207), a threaded sleeve (208) is threadedly connected to the threaded rod (207), and both ends of the threaded sleeve (208) are connected to the first blocking plate (209).

3. The catalyst adding device for rare metal recovery reaction in cyanide waste liquid according to claim 1, characterized in that: The material outlet (201) is provided with a dispersion unit (300) for dispersing the catalyst so that the catalyst is evenly dispersed inside the treatment tank (102).

4. The catalyst adding device for rare metal recovery reaction in cyanide waste liquid according to claim 3, characterized in that: The dispersion unit (300) comprises a movable shaft (301) arranged inside the discharge port (201), and a dispersion disc (302) is installed at one end of the movable shaft (301) close to the processing tank (102), the dispersion disc (302) being arranged in a conical structure, and a conical groove matching the dispersion disc (302) is provided at the open position of the discharge port (201), and the dispersion disc (302) is used to close the open position of the discharge port (201).

5. The catalyst adding device for rare metal recovery reaction in cyanide waste liquid according to claim 4, characterized in that: The movable shaft (301) is slidably connected to a sleeve (303) on the outside, and the sleeve (303) is mounted on the discharge port (201). A first connecting frame (304) is also mounted on the discharge port (201), and the interior of the first connecting frame (304) is rotatably connected to a shaft sleeve (305) via a bearing. The interior of the shaft sleeve (305) is slidably connected to a spline shaft (306), and the spline shaft (306) and the movable shaft (301) are fixedly connected. A third motor (307) is mounted on the first connecting frame (304), and a first gear (308) is mounted on the output shaft of the third motor (307). A second gear (309) is meshingly connected to the first gear (308), and the second gear (309) is mounted on the shaft sleeve (305).

6. The catalyst adding device for rare metal recovery reaction in cyanide waste liquid according to claim 5, characterized in that: A second connecting frame (310) is also mounted on the first connecting frame (304), and a first connecting cylinder (311) is mounted on the second connecting frame (310); a first piston rod (312) is slidably connected inside the first connecting cylinder (311), and a connecting block (313) is mounted on one end of the first piston rod (312) away from the first connecting cylinder (311); the connecting block (313) is rotatably connected to the spline shaft (306) via a bearing; a first spring (314) is provided on the first piston rod (312); and a second connecting cylinder (311) is mounted on the feed box (203). (316), and the interior of the second connecting cylinder (316) is slidably connected with a second piston rod (317), one end of the second piston rod (317) away from the second connecting cylinder (316) passes through the feed box (203) and extends to the interior of the feed box (203), and the second piston rod (317) is provided with a second spring (318), and a hose (320) is installed between the first connecting cylinder (311) and the second connecting cylinder (316) so as to communicate the interiors of the first connecting cylinder (311) and the second connecting cylinder (316) through the hose (320).

7. The catalyst adding device for rare metal recovery reaction in cyanide waste liquid according to claim 4, characterized in that: A plurality of flow dividing plates (321) are evenly distributed in a ring shape on the dispersion plate (302), and each flow dividing plate (321) is provided with a notch that matches the open portion of the discharge port (201).

8. The catalyst adding device for rare metal recovery reaction in cyanide waste liquid according to claim 1, characterized in that: The feed box (203) is provided with an opening that matches the feeding hopper (204); the interiors of the feed box (203) and the feeding hopper (204) are connected via the opening; a sealing unit (400) is provided inside the opening; the sealing unit (400) is used to isolate the catalyst inside the feeding hopper (204).

9. The catalyst adding device for rare metal recovery reaction in cyanide waste liquid according to claim 8, characterized in that: The closing unit (400) comprises a second blocking plate (401) slidably connected to the opening, and a guide frame is mounted on the second blocking plate (401), a guide rod (402) is slidably connected to the inside of the guide frame, and one end of the guide rod (402) away from the guide frame is fixedly connected to the outer wall of the feed box (203), and a third spring (403) is provided on the guide rod (402).

10. The catalyst adding device for rare metal recovery reaction in cyanide waste liquid according to claim 9, characterized in that: A blocking block (404) is mounted on the second blocking plate (401), a movable groove adapted to the second blocking plate (401) is provided in the opening, and a notch for accommodating the blocking block (404) is provided in the movable groove.

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