Corrosion-resistant leaching tank for preparing high-purity lithium carbonate

Abstract

The utility model provides a corrosion-resistant leaching tank for preparing high-purity lithium carbonate, which comprises a leaching processing tank, a stirring component is arranged in the leaching processing tank, a liquid guide component is arranged at the upper end of a protective cover, and in the preparation process of the high-purity lithium carbonate, a low-speed motor drives a rotating vertical shaft to rotate through a driving bevel gear and a driven bevel gear; a rotating vertical shaft can drive a stirring cross rod and a stirring vertical rod to rotate at a low speed to stir lithium ore powder in the leaching processing tank, and meanwhile, a fluorine lining adjusting valve is opened, so that acid liquor in a liquid storage tank is dispersed and discharged downwards through a connecting pipe, a liquid guide cavity, a communicating cavity and a plurality of liquid discharging through holes; and moreover, the rotating liquid feeding rod can also enable the discharged acid liquid to be scattered in a wider range, the acid liquid is prevented from intensively flowing to a local area to form deposition, so that the acid liquid can be quickly and uniformly mixed with the lithium ore powder in the leaching processing tank, and the mixing leaching efficiency of the lithium ore powder and the acid liquid is higher.

Description

Technical Field

[0001] The utility model relates to the technical field of high-purity lithium carbonate preparation, in particular to a corrosion-resistant leaching tank for high-purity lithium carbonate preparation. Background Art

[0002] High-purity lithium carbonate is a widely used lithium salt with the chemical formula Li2CO3. It can be used in battery materials, catalysts, glass and other industries. Compared with traditional lithium carbonate, high-purity lithium carbonate has higher purity, better solubility and more stable chemical properties. The main methods for preparing lithium carbonate are to extract lithium from salt lake brine and to extract lithium from lithium-containing ores. Spodumene or lithium mica is an important raw material for extracting lithium from ores. Acid leaching is a common method for extracting lithium from lithium-containing ores. The process is to roast and transform the lithium-containing ore, crush it, mix it with acid, and then stir and leach it for a period of time.

[0003] Publication number "CN216891136U" provides a leaching device for preparing lithium carbonate. The dispersion disk and the first vertical stirring rod and the second vertical stirring rod are driven to rotate by a stirring shaft. By arranging horizontal stirring blades on the vertical stirring rods, the slurry inside the stirring barrel is stirred from different directions, making the stirring more uniform, and the materials are fully mixed, which effectively improves the stirring effect and efficiency, thereby making the leaching rate higher.

[0004] However, the above technical solutions and the prior art have the following defects:

[0005] Although the leaching device for preparing lithium carbonate can stir the internal slurry, the device feeds the acid solution into the stirring channel through the material port. This feeding method easily causes the input acid solution to flow to one area and form siltation. At this time, the stirring structure needs to stir for a long time to fully mix the acid solution and the lithium ore powder. Therefore, the stirring and mixing time of the leaching device is long, which affects the subsequent lithium carbonate preparation efficiency. Utility Model Content

[0006] The utility model aims to provide a corrosion-resistant leaching tank for preparing high-purity lithium carbonate to solve the problems raised in the above-mentioned background technology.

[0007] In order to achieve the above purpose, the utility model provides the following technical solutions:

[0008] A corrosion-resistant leaching tank for preparing high-purity lithium carbonate, comprising a leaching processing tank, a plugging tank cover, a protective cover and a feeding hopper, wherein the upper end face of the leaching processing tank is installed with a plugging tank cover, the bottom of the leaching processing tank is fixedly connected with a supporting leg, a discharge valve is installed at the middle position of the bottom of the leaching processing tank, the upper end face of the plugging tank cover is installed with a protective cover, a feeding hopper is arranged on the left side of the upper end face of the plugging tank cover, a stirring assembly is arranged inside the leaching processing tank, and the stirring assembly is used to stir and leach the roasted and crushed lithium ore and acid solution, and a liquid guide assembly is arranged on the upper end of the protective cover, and the liquid guide assembly is used to guide the acid solution and put it into the leaching processing tank.

[0009] Preferably, the stirring assembly includes a titanium alloy ultrasonic vibrator rod, a rotating vertical shaft, a stirring cross bar, a low-speed motor, a driving bevel gear and a driven bevel gear. A low-speed motor is installed on the right side of the upper end face of the sealing tank cover, a driving bevel gear is installed on the left end of the low-speed motor, a driven bevel gear is meshed with the lower side of the annular side of the driving bevel gear, a rotating vertical shaft is arranged inside the driven bevel gear, a stirring cross bar is arranged on the lower side of the annular side of the rotating vertical shaft, and titanium alloy ultrasonic vibrator rods are symmetrically installed on the left and right sides of the leaching processing tank.

[0010] Preferably, the liquid guiding assembly includes a support rod, a liquid storage tank, a fluorine-lined regulating valve, a connecting pipe, a liquid guiding cavity, a liquid dosing rod, a connecting cavity and a liquid discharge hole. A liquid dosing rod is provided on the upper side of the annular side surface of the rotating vertical shaft, a connecting cavity is provided inside the liquid dosing rod, a plurality of liquid discharge holes are provided on the lower side of the annular side surface of the liquid dosing rod, a liquid guiding cavity is provided on the upper side of the rotating vertical shaft, a support rod is fixedly connected to the upper end surface of the protective cover, a fluorine-lined regulating valve is fixedly connected to the upper end of the support rod, a fluorine-lined regulating valve is installed at the outlet of the liquid storage tank, and a connecting pipe is connected to the lower end of the fluorine-lined regulating valve.

[0011] Preferably, stirring vertical rods are symmetrically arranged on the upper and lower sides of the annular side surface of the stirring horizontal rod, and a limiting ring is arranged on the upper side of the annular side surface of the rotating vertical shaft.

[0012] Preferably, the connecting cavity is respectively connected with the drainage through hole and the liquid conducting cavity, the connecting pipe is connected with the liquid conducting cavity, a liquid level scale line is provided on the rear side of the inner wall of the liquid storage tank, and the inner wall of the liquid storage tank, the inner wall of the connecting pipe, the liquid conducting cavity and the connecting cavity are all sprayed with acid-resistant paint.

[0013] Preferably, a sealing ring is installed on the annular side surface of the titanium alloy ultrasonic vibration rod, and the sealing ring is made of fluororubber, and the outer surfaces of the rotating vertical shaft and the stirring cross bar are sprayed with acid-resistant paint.

[0014] Preferably, an observation window is provided on the front side of the annular side of the leaching processing tank, the sealing tank cover is a detachable structure, the inner annular side of the leaching processing tank and the outer surface of the sealing tank cover are sprayed with acid-resistant paint, and the discharge valve is made of a fluorine-lined gate valve.

[0015] Compared with the prior art, the beneficial effects of the utility model are:

[0016] 1. In the process of preparing high-purity lithium carbonate, a low-speed motor drives the rotating vertical shaft to rotate through the driving bevel gear and the driven bevel gear, and the rotating vertical shaft drives the stirring cross bar and the stirring vertical rod to rotate at a low speed to stir the lithium ore powder inside the leaching tank, and the titanium alloy ultrasonic vibrating rod causes the surrounding mixture to move violently, thereby improving the mixing efficiency of the lithium ore powder and the acid solution;

[0017] 2. By opening the fluorine-lined regulating valve, the acid liquid inside the liquid storage tank can be dispersed and discharged downward through the connecting pipe, the liquid guide cavity, the connecting cavity and multiple drainage holes, and the rotating liquid feeding rod can also make the discharged acid liquid scatter more widely, avoiding the acid liquid from concentrating on flowing to a local area and forming siltation, so that the acid liquid can be quickly and evenly mixed with the lithium ore powder inside the leaching processing tank, so as to make the mixed leaching efficiency of lithium ore powder and acid liquid faster. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 It is a schematic diagram of the main structure of the utility model;

[0019] Figure 2 It is a rear view of the utility model;

[0020] Figure 3 It is a front cross-sectional view of the stirring component and the liquid guiding component in the utility model;

[0021] Figure 4 It is a partial structural diagram of the stirring component and the liquid guiding component in the utility model;

[0022] Figure 5 for Figure 3 A is an enlarged view of the middle image.

[0023] In the figure: 1. Leaching processing tank; 2. Support legs; 3. Discharge valve; 4. Stirring assembly; 41. Titanium alloy ultrasonic vibrating rod; 411. Sealing retaining ring; 42. Rotating vertical shaft; 421. Limiting ring; 43. Stirring cross bar; 431. Stirring vertical bar; 44. Low-speed motor; 45. Active bevel gear; 46. Driven bevel gear; 5. Sealing tank cover; 6. Liquid guide assembly; 61. Support rod; 62. Liquid storage tank; 63. Fluorine-lined regulating valve; 64. Connecting pipe; 65. Liquid guide cavity; 66. Liquid feeding rod; 67. Connecting cavity; 68. Liquid discharge through hole; 7. Protective cover; 8. Feed hopper. DETAILED DESCRIPTION

[0024] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0025] See also Figure 1-5 , the utility model provides a technical solution:

[0026] Embodiment 1:

[0027] A corrosion-resistant leaching tank for preparing high-purity lithium carbonate comprises a leaching processing tank 1, a blocking tank cover 5, a protective cover 7 and a feeding hopper 8. The blocking tank cover 5 is installed on the upper end surface of the leaching processing tank 1. The blocking tank cover 5 is a detachable structure. The detachable blocking tank cover 5 can not only block the upper end of the leaching processing tank 1, but also facilitate the later staff to maintain the inside of the leaching processing tank 1. The bottom of the leaching processing tank 1 is fixedly connected with a supporting leg 2. The bottom of the supporting leg 2 is fixed to a specified position on the ground by an expansion bolt, and the supporting leg 2 can stably support the leaching processing tank 1.

[0028] A discharge valve 3 is installed at the middle position of the bottom of the leaching processing tank 1. The outlet of the discharge valve 3 is connected to the inlet of the external sedimentation tank through a pipeline. The bottom height of the discharge valve 3 is higher than the inlet height of the external sedimentation tank. The discharge valve 3 is made of a fluorine-lined gate valve. The discharge valve 3 made of a fluorine-lined gate valve can not only discharge the stirred mixture into the external sedimentation tank for solid-liquid sedimentation separation, but also has good corrosion resistance. A protective cover 7 is installed on the upper end surface of the blocking tank cover 5. The protective cover 7 can not only support the support rod 61, but also can support the low-speed motor 44, the active bevel gear 45 and the driven bevel gear 4 6 for protection, a ventilation cavity is provided on the right end face of the protective cover 7, which facilitates external air to enter the protective cover 7 for ventilation and cooling, a feeding hopper 8 is provided on the left side of the upper end face of the plugging tank cover 5, which facilitates the staff to put an appropriate amount of roasted and crushed lithium ore into the leaching processing tank 1, and an observation window is provided on the front side of the annular side of the leaching processing tank 1. The observation window facilitates the staff to observe the internal situation of the leaching processing tank 1 in real time, and the inner annular side of the leaching processing tank 1 and the outer surface of the plugging tank cover 5 are sprayed with acid-resistant paint, and the acid-resistant paint makes the leaching processing tank 1 and the plugging tank cover 5 have good corrosion resistance.

[0029] A stirring assembly 4 is provided inside the leaching processing tank 1, and the stirring assembly 4 is used to stir and leach the roasted and crushed lithium ore and acid solution. A liquid guide assembly 6 is provided on the upper end of the protective cover 7, and the liquid guide assembly 6 is used to guide the acid solution into the leaching processing tank 1.

[0030] The stirring assembly 4 includes a titanium alloy ultrasonic vibrating rod 41, a rotating vertical shaft 42, a stirring cross bar 43, a low-speed motor 44, a driving bevel gear 45 and a driven bevel gear 46. The low-speed motor 44 is installed on the right side of the upper end surface of the plugging tank cover 5. The low-speed motor 44 can drive the driving bevel gear 45 to rotate when working. The driving bevel gear 45 is installed on the left end of the low-speed motor 44. The driving bevel gear 45 can drive the driven bevel gear 46 to rotate. The driven bevel gear 46 is meshed with the driven bevel gear 46 on the lower side of the annular side of the driving bevel gear 45. The driven bevel gear 46 can drive the rotating vertical shaft 42 to rotate. The driven bevel gear 46 is provided with a rotating vertical shaft 42 inside. The rotating vertical shaft 42 and the driven bevel gear 46, the limiting ring 421, the liquid injection rod 66 and The stirring cross bars 43 are all connected by welding. The rotating vertical shaft 42 can drive the liquid feeding rod 66 and the stirring cross bar 43 to rotate. The stirring cross bar 43 is arranged on the lower side of the circular side of the rotating vertical shaft 42. The stirring cross bar 43 can stir the mixture inside the leaching processing tank 1 when rotating. Titanium alloy ultrasonic vibration rods 41 are symmetrically installed on the left and right sides of the leaching processing tank 1. The titanium alloy ultrasonic vibration rods 41 are connected to an external ultrasonic generator. The titanium alloy ultrasonic vibration rods 41 can send ultrasonic waves to the surroundings when working, so that the surrounding mixture undergoes violent forced motion, thereby accelerating the transmission and diffusion of the mixture, thereby further improving the mixing efficiency of lithium ore and acid solution, and the titanium alloy ultrasonic vibration rods 41 also have good corrosion resistance.

[0031] Stirring vertical rods 431 are symmetrically arranged on the upper and lower sides of the annular side of the stirring crossbar 43. The stirring vertical rod 431 is connected to the stirring crossbar 43 by welding. The stirring vertical rod 431 can increase the stirring range of the stirring crossbar 43 so as to fully stir and mix the lithium ore and the acid solution. A limiting ring 421 is arranged on the upper side of the annular side of the rotating vertical shaft 42, and a blocking ring is installed at the middle position of the upper end surface of the sealing tank cover 5. The limiting ring 421 and the blocking ring prevent the rotating vertical shaft 42 from displacement or shaking during rotation and use. A sealing retaining ring 411 is installed on the annular side of the titanium alloy ultrasonic vibration rod 41, and the sealing retaining ring 411 is made of fluororubber. The sealing retaining ring 411 made of fluororubber makes the titanium alloy ultrasonic vibration rod 41 and the leaching processing tank 1 more sealed, and prevents the mixture from overflowing to the outside through the gap. The outer surfaces of the rotating vertical shaft 42 and the stirring crossbar 43 are sprayed with acid-resistant paint, and the acid-resistant paint makes the rotating vertical shaft 42 and the stirring crossbar 43 more corrosion-resistant.

[0032] Embodiment 2:

[0033] On the basis of Example 1, in this embodiment, by opening the fluorine lining regulating valve 63, the acid liquid inside the liquid storage tank 62 is dispersed and discharged downward through the connecting pipe 64, the liquid guiding cavity 65, the connecting cavity 67 and the plurality of drainage holes 68, and the rotating liquid feeding rod 66 can also make the discharged acid liquid scatter more widely, avoiding the acid liquid from concentrating and flowing to a local area to form siltation, so that the acid liquid can be quickly and evenly mixed with the lithium ore powder inside the leaching processing tank 1, thereby making the mixed leaching efficiency of the lithium ore powder and the acid liquid faster.

[0034] The liquid guiding assembly 6 includes a support rod 61, a liquid storage tank 62, a fluorine-lined regulating valve 63, a connecting pipe 64, a liquid guiding cavity 65, a liquid feeding rod 66, a connecting cavity 67 and a liquid discharge hole 68. A liquid feeding rod 66 is arranged on the upper side of the annular side surface of the rotating vertical shaft 42, and the liquid feeding rod 66 can feed the acid liquid. A connecting cavity 67 is opened inside the liquid feeding rod 66, and the connecting cavity 67 is respectively connected with the liquid discharge hole 68 and the liquid guiding cavity 65, and the connecting cavity 67 facilitates the acid liquid to enter the inside of the liquid feeding rod 66. A plurality of liquid discharge holes 68 are opened on the lower side of the annular side surface of the liquid feeding rod 66, and the plurality of liquid discharge holes 68 can disperse and discharge the acid liquid inside the connecting cavity 67 downwardly. A liquid guiding cavity 65 is opened on the upper side of the rotating vertical shaft 42, and the liquid guiding cavity 65 facilitates the acid liquid to enter the upper side of the rotating vertical shaft 42.

[0035] The upper end surface of the protective cover 7 is fixedly connected with a support rod 61, and the support rod 61 can support the liquid storage tank 62. The upper end of the support rod 61 is fixedly connected with the liquid storage tank 62, and the liquid storage tank 62 can temporarily store an appropriate amount of acid liquid. A fluorine-lined regulating valve 63 is installed at the outlet of the liquid storage tank 62. The fluorine-lined regulating valve 63 is not only convenient for the staff to control the on-off and flow rate of the acid liquid flowing into the connecting pipe 64, but also has good corrosion resistance. The lower end of the fluorine-lined regulating valve 63 is connected with a connecting pipe 64, and the connecting pipe 64 is connected to the liquid guide cavity 65. The connecting pipe 6 4 and the rotating vertical shaft 42 are clearance-matched, the connecting pipe 64 can guide the acid into the liquid guiding cavity 65, and a liquid level scale is arranged on the rear side of the inner wall of the liquid storage tank 62, which is convenient for the staff to observe the liquid level height of the acid inside the liquid storage tank 62, so as to judge the amount of acid inside the liquid storage tank 62, and the inner wall of the liquid storage tank 62, the inner wall of the connecting pipe 64, the liquid guiding cavity 65 and the connecting cavity 67 are all sprayed with acid-resistant paint, which makes the liquid storage tank 62, the connecting pipe 64, the liquid guiding cavity 65 and the connecting cavity 67 more corrosion-resistant.

[0036] Working principle: In the process of preparing high-purity lithium carbonate, the staff first puts an appropriate amount of roasted and crushed lithium ore powder into the leaching tank 1 through the feeding hopper 8, and then starts the low-speed motor 44, so that the low-speed motor 44 drives the rotating vertical shaft 42 to rotate through the active bevel gear 45 and the driven bevel gear 46, and the rotating vertical shaft 42 drives the liquid feeding rod 66, the stirring cross bar 43 and the stirring vertical rod 431 to rotate at a low speed, so that the stirring cross bar 43 and the stirring vertical rod 431 stir the lithium ore powder inside the leaching tank 1; at the same time, Pour the required amount of acid into the liquid storage tank 62, then open the fluorine lining regulating valve 63, so that the acid in the liquid storage tank 62 flows into the liquid guide cavity 65 through the connecting pipe 64, and then is dispersed and discharged downward through the connecting cavity 67 and multiple drainage holes 68. The rotating liquid feeding rod 66 can also make the discharged acid fall more sparsely, avoiding the acid from concentrating and flowing to a local area to form siltation, so that the acid can be quickly and evenly mixed with the lithium ore powder in the leaching processing tank 1. In this process, the mixture of lithium ore powder and acid cannot exceed the highest liquid level line ( Figure 3 Then the staff makes the titanium alloy ultrasonic vibrator 41 work. At this time, the working titanium alloy ultrasonic vibrator 41 makes the surrounding mixture to move violently, thereby further improving the mixing efficiency of the lithium ore powder and the acid solution. When the lithium ore powder and the acid solution are stirred and mixed and leached to the desired state, the staff can open the discharge valve 3 to discharge the mixed leached lithium ore powder and acid solution mixture into the external sedimentation tank for solid-liquid sedimentation separation. When the mixture inside the leaching processing tank 1 is completely discharged, the low-speed motor 44 and the titanium alloy ultrasonic vibrator 41 can be turned off.

[0037] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A corrosion-resistant leaching tank for preparing high-purity lithium carbonate, comprising a leaching processing tank (1), a blocking tank cover (5), a protective cover (7) and a feeding hopper (8), characterized in that: The upper end surface of the leaching processing tank (1) is provided with a blocking tank cover (5), the bottom of the leaching processing tank (1) is fixedly connected with a supporting leg (2), and a discharge valve (3) is provided at the middle position of the bottom of the leaching processing tank (1); A protective cover (7) is installed on the upper end surface of the plugging tank cover (5), and a feeding hopper (8) is arranged on the left side of the upper end surface of the plugging tank cover (5). A stirring component (4) is arranged inside the leaching processing tank (1), and the stirring component (4) is used to stir and leach the roasted and crushed lithium ore and acid solution. A liquid guide component (6) is arranged on the upper end of the protective cover (7), and the liquid guide component (6) is used to guide the acid solution and put it into the leaching processing tank (1).

2. A corrosion-resistant leaching tank for preparing high-purity lithium carbonate according to claim 1, characterized in that: The stirring assembly (4) comprises a titanium alloy ultrasonic vibration rod (41), a rotating vertical shaft (42), a stirring cross bar (43), a low-speed motor (44), a driving bevel gear (45) and a driven bevel gear (46); the low-speed motor (44) is installed on the right side of the upper end surface of the plugging tank cover (5); the driving bevel gear (45) is installed on the left end of the low-speed motor (44); the driven bevel gear (46) is meshed on the lower side of the annular side surface of the driving bevel gear (45); the rotating vertical shaft (42) is arranged inside the driven bevel gear (46); the stirring cross bar (43) is arranged on the lower side of the annular side surface of the rotating vertical shaft (42); and the titanium alloy ultrasonic vibration rod (41) is symmetrically installed on the left and right sides of the inside of the leaching processing tank (1).

3. A corrosion-resistant leaching tank for preparing high-purity lithium carbonate according to claim 2, characterized in that: The liquid guiding assembly (6) comprises a support rod (61), a liquid storage tank (62), a fluorine-lined regulating valve (63), a connecting pipe (64), a liquid guiding cavity (65), a liquid-feeding rod (66), a connecting cavity (67) and a liquid discharge through hole (68); a liquid-feeding rod (66) is arranged on the upper side of the annular side surface of the rotating vertical shaft (42); a connecting cavity (67) is provided inside the liquid-feeding rod (66); a plurality of liquid discharge through holes (68) are provided on the lower side of the annular side surface of the liquid-feeding rod (66); a liquid guiding cavity (65) is provided on the upper side of the rotating vertical shaft (42); a support rod (61) is fixedly connected to the upper end surface of the protective cover (7); the upper end of the support rod (61) is fixedly connected to the liquid storage tank (62); a fluorine-lined regulating valve (63) is installed at the outlet of the liquid storage tank (62); and a connecting pipe (64) is connected to the lower end of the fluorine-lined regulating valve (63).

4. A corrosion-resistant leaching tank for preparing high-purity lithium carbonate according to claim 2, characterized in that: Stirring vertical rods (431) are symmetrically arranged on the upper and lower sides of the annular side surface of the stirring horizontal rod (43), and a limiting ring (421) is arranged on the upper side of the annular side surface of the rotating vertical shaft (42).

5. A corrosion-resistant leaching tank for preparing high-purity lithium carbonate according to claim 3, characterized in that: The communicating cavity (67) is respectively connected to the liquid discharge through hole (68) and the liquid guiding cavity (65); the connecting pipe (64) is connected to the liquid guiding cavity (65); a liquid level scale is arranged on the rear side of the inner wall of the liquid storage tank (62); and the inner wall of the liquid storage tank (62), the inner wall of the connecting pipe (64), the liquid guiding cavity (65) and the communicating cavity (67) are all sprayed with acid-resistant paint.

6. A corrosion-resistant leaching tank for preparing high-purity lithium carbonate according to claim 2, characterized in that: A sealing ring (411) is installed on the annular side surface of the titanium alloy ultrasonic vibration rod (41), and the sealing ring (411) is made of fluororubber. The outer surfaces of the rotating vertical shaft (42) and the stirring cross bar (43) are sprayed with acid-resistant paint.

7. The corrosion-resistant leaching tank for preparing high-purity lithium carbonate according to claim 1, characterized in that: The front side of the annular side of the leaching processing tank (1) is provided with an observation window, the blocking tank cover (5) is a detachable structure, the inner annular side of the leaching processing tank (1) and the outer surface of the blocking tank cover (5) are sprayed with acid-resistant paint, and the discharge valve (3) is made of a fluorine-lined gate valve.

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