Lithium carbonate preparation with lithium sink centrifuge

Abstract

The utility model relates to lithium carbonate preparation technical field, specifically disclose a lithium carbonate preparation is used lithium sink centrifuge, including the outer tube, the inside of outer tube is provided with centrifugal mechanism, the centrifugal mechanism includes the meshed rotating drum setting in the outer tube, the projection fixedly connected in the inner wall of rotating drum, with rotating drum one end intercommunication, and the liquid inlet pipe extending to the outside of outer tube, the bull wheel fixedly connected in the outer wall of liquid inlet pipe, the pinion meshing connection with bull wheel, the servo motor of output end and pinion fixed connection, through'primary centrifugal + secondary dehydration's two -stage separation structure, first utilize the high -speed rotation of meshed rotating drum and generate centrifugal force, realize the preliminary high -efficient separation of mother liquor and solid material, again through the rotation of the stirring of the separating box in the plectrum and the synergistic effect of the up and down movement driven by the electric push rod, strengthen the separation of residual moisture, significantly reduce the moisture content of solid material, reduce the energy consumption of subsequent drying procedure, effectively improve the purity and quality of lithium carbonate product.

Description

Technical Field

[0001] This utility model relates to the field of lithium carbonate preparation technology, and specifically discloses a lithium carbonate precipitation centrifuge for lithium carbonate preparation. Background Technology

[0002] The lithium precipitation process is the most crucial step in the production of industrial lithium carbonate. A precipitation reaction is carried out in a container by mixing a complete solution (an aqueous solution of Li₂SO₄) and an alkaline solution in a specific ratio to produce a solid lithium carbonate product. This solid lithium carbonate product is then separated from the mother liquor containing a large amount of dissolved sodium sulfate. The solid lithium carbonate product is further purified by washing and drying to remove moisture, yielding a product that meets customer requirements. The main purpose of this process is to maximize the conversion of lithium oxide in the material into lithium carbonate while removing various impurities (Na⁺, Ca²⁺, Mg²⁺, etc.), thereby reducing material consumption.

[0003] Currently, solid-liquid separation after lithium precipitation is mostly achieved using ordinary centrifuges, which rely mainly on centrifugal force for separation. However, due to uneven distribution of centrifugal force or material accumulation, some residual mother liquor cannot be effectively removed from the lithium carbonate solid precipitate, resulting in a high water content in the solid material. This necessitates additional energy consumption and time for the drying process. Therefore, a lithium precipitation centrifuge for lithium carbonate preparation is needed to solve this problem. Utility Model Content

[0004] This invention proposes a lithium carbonate precipitation centrifuge for lithium carbonate preparation. Through a two-stage separation structure of "primary centrifugation + secondary dehydration", it first achieves preliminary and efficient separation of mother liquor and solid materials; then it enhances the removal of residual moisture, significantly reducing the water content of solid materials, reducing energy consumption in subsequent drying processes, and effectively improving the purity and quality of lithium carbonate products.

[0005] This utility model is implemented as follows: a lithium carbonate preparation centrifuge includes an outer cylinder, a centrifugation mechanism is provided inside the outer cylinder, and a separation mechanism is provided at the lower right of the outer cylinder. The centrifugal mechanism includes a mesh rotating drum disposed inside the outer cylinder, a protrusion fixedly connected to the inner wall of the rotating drum, an inlet pipe communicating with one end of the rotating drum and extending to the outside of the outer cylinder, a large gear fixedly connected to the outer wall of the inlet pipe, a small gear meshing with the large gear, and a servo motor whose output end is fixedly connected to the small gear. The separation mechanism includes a separation box connected to an outer cylinder via a material conveying mechanism, a separation mesh frame disposed inside the separation box, a lever disposed inside the separation mesh frame, a mounting plate disposed inside the separation box, a drive motor mounted on the upper surface of the mounting plate and whose output end is fixedly connected to the lever, and two electric push rods mounted on the upper surface of the separation box and whose output end is fixedly connected to the mounting plate.

[0006] As a preferred embodiment of the lithium carbonate preparation centrifuge of this utility model, the conveying mechanism includes a conveying cylinder connected to the other end of the rotating drum, and a conveying auger rotatably connected inside the conveying cylinder.

[0007] As a preferred embodiment of the lithium carbonate preparation centrifuge of this utility model, the top of the separation box is provided with a through hole, and the right side of the separation box is connected to a drain pipe.

[0008] In a preferred embodiment of the lithium carbonate preparation centrifuge of this utility model, the bottom end of the outer cylinder is connected to a liquid outlet pipe, and the bottom end of the conveying cylinder is connected to a discharge pipe located in a through hole.

[0009] As a preferred embodiment of the lithium carbonate preparation centrifuge of this utility model, support blocks are fixedly connected to both the left and right sides of the inner wall of the separation box.

[0010] In a preferred embodiment of the lithium carbonate preparation centrifuge of this utility model, a controller is installed on the outer wall of the separation chamber, and both the servo motor and the drive motor are electrically connected to the controller.

[0011] The beneficial effects of this utility model are:

[0012] The slurry is fed into a high-speed rotating mesh drum through the inlet pipe. Under centrifugal force, the mother liquor is thrown out through the mesh holes on the drum wall, while the lithium carbonate solid precipitate is trapped inside the drum. The centrifugal mechanism then achieves preliminary and efficient separation of the mother liquor and solid material. The drive motor rotates the agitator, stirring the wet material in the separation mesh frame. At the same time, the electric push rod can intermittently or continuously push the mounting plate, drive motor, and agitator to move up and down as a whole, preventing the mesh frame from clogging and further separating residual water. The water passes through the separation mesh frame and is discharged through the drain pipe on the right side of the separation box. The lithium carbonate solid, after secondary dehydration, remains in the mesh frame, thus enhancing the secondary dehydration effect, making the solid-liquid separation more thorough, and effectively improving the recovery rate and product quality of lithium carbonate. Attached Figure Description To more clearly illustrate the specific embodiments of this utility model or the technical solutions in the prior art, the drawings used in the description of the specific embodiments or the prior art will be briefly introduced below. In all the drawings, similar elements or parts are generally identified by similar reference numerals. In the drawings, the elements or parts are not necessarily drawn to scale.

[0013] Figure 1 This is a front sectional view of a lithium carbonate preparation centrifuge according to the present invention.

[0014] Figure 2 This is a structural diagram of the outer cylinder and conveying cylinder of this utility model.

[0015] Figure 3 This is a structural diagram of the separation box of this utility model.

[0016] The markings in the diagram are: 1. Outer cylinder; 101. Liquid outlet pipe; 2. Rotating drum; 201. Protrusion; 202. Liquid inlet pipe; 203. Large gear; 204. Small gear; 205. Servo motor; 3. Conveying cylinder; 301. Conveying auger; 302. Discharge pipe; 4. Separating box; 401. Separating mesh frame; 402. Pulley; 403. Mounting plate; 404. Drive motor; 405. Electric push rod. Detailed Implementation

[0017] The present invention will be further described below with reference to the accompanying drawings and specific embodiments to aid in understanding its content. Unless otherwise specified, the methods used in this invention are conventional methods; the raw materials and apparatus used, unless otherwise specified, are conventional commercially available products.

[0018] Please see Figure 1-3 A lithium carbonate preparation centrifuge includes an outer cylinder 1, a centrifugation mechanism is provided inside the outer cylinder 1, and a separation mechanism is provided at the lower right of the outer cylinder 1. The centrifugal mechanism includes a mesh rotating drum 2 disposed inside the outer cylinder 1, a protrusion 201 fixedly connected to the inner wall of the rotating drum 2, an inlet pipe 202 connected to one end of the rotating drum 2 and extending to the outside of the outer cylinder 1, a large gear 203 fixedly connected to the outer wall of the inlet pipe 202, a small gear 204 meshing with the large gear 203, and a servo motor 205 whose output end is fixedly connected to the small gear 204. The separation mechanism includes a separation box 4 connected to the outer cylinder 1 via a material conveying mechanism, a separation mesh frame 401 disposed inside the separation box 4, a lever 402 disposed inside the separation mesh frame 401, a mounting plate 403 disposed inside the separation box 4, a drive motor 404 mounted on the upper surface of the mounting plate 403 and whose output end is fixedly connected to the lever 402, and two electric push rods 405 mounted on the upper surface of the separation box 4 and whose output end is fixedly connected to the mounting plate 403.

[0019] In this embodiment: the slurry is fed into the high-speed rotating mesh drum 2 through the inlet pipe 202. Under the action of centrifugal force, the mother liquor is thrown out through the mesh holes on the wall of the drum 2 and discharged through the outlet pipe 101 at the bottom of the outer cylinder 1. The lithium carbonate solid precipitate is trapped inside the drum 2. Thus, the mother liquor and solid material can be initially and efficiently separated through the centrifugal mechanism.

[0020] At this time, the drive motor 404 drives the lever 402 to rotate, agitating the wet material in the separation mesh frame 401. At the same time, the electric push rod 405 can intermittently or continuously push the mounting plate 403, drive motor 404, and lever 402 to move up and down as a whole, avoiding clogging of the mesh frame and further separating the residual water. The water passes through the separation mesh frame 401 and is discharged through the drain pipe on the right side of the separation box 4. The lithium carbonate solids that have undergone secondary dehydration remain in the mesh frame, thereby enhancing the secondary dehydration effect, making the solid-liquid separation more thorough, and effectively improving the recovery rate of lithium carbonate and product quality.

[0021] As a technical optimization of this utility model, the material conveying mechanism includes a conveying cylinder 3 connected to the other end of the rotating cylinder 2, and a conveying auger 301 rotatably connected inside the conveying cylinder 3.

[0022] In this embodiment: the solid material initially separated and pushed by the rotating drum 2 falls into the conveying drum 3 connected to it. The conveying auger 301 rotates under power drive, and its spiral blades continuously push the material along the axial direction of the conveying drum 3 towards the discharge pipe at the end.

[0023] As a technical optimization of this utility model, a through hole is provided at the top of the separation box 4, and a drain pipe is connected to the right side of the separation box 4.

[0024] In this embodiment: the top through hole provides a channel for the material to enter the separation box 4, and the drain pipe can promptly export the liquid separated in the second stage.

[0025] As a technical optimization of this utility model, the bottom end of the outer cylinder 1 is connected to the liquid outlet pipe 101, and the bottom end of the conveying cylinder 3 is connected to the discharge pipe 302 located in the through hole.

[0026] In this embodiment: the liquid outlet pipe 101 is used to collect and discharge the mother liquor generated by the primary centrifugal separation, while the discharge pipe 302 accurately introduces the preliminarily dehydrated solid material into the secondary separation device.

[0027] As a technical optimization of this utility model, support blocks are fixedly connected to both the left and right sides of the inner wall of the separation box 4.

[0028] In this embodiment: the support block is used to support the separation frame 401, so that it is placed stably in the predetermined position in the separation box 4, which facilitates installation and removal for cleaning and maintenance.

[0029] As a technical optimization of this utility model, a controller is installed on the outer wall of the separation box 4, and the servo motor 205 and the drive motor 404 are both electrically connected to the controller.

[0030] In this embodiment, the servo motor 205 and drive motor 404 can be controlled by the controller to operate normally.

[0031] The working principle and usage process of this utility model are as follows: The slurry is fed into the high-speed rotating mesh drum 2 through the inlet pipe 202. Under the action of centrifugal force, the mother liquor is thrown out through the mesh holes on the wall of the drum 2 and discharged through the outlet pipe 101 at the bottom of the outer cylinder 1. The lithium carbonate solid precipitate is trapped inside the drum 2 and moves to the other end of the drum 2 and enters the conveying cylinder 3. The conveying auger 301 rotates and pushes the solid material to the discharge pipe 302 at the bottom and falls into the separation mesh frame 401 in the separation box 4 below. At this time, the drive motor 404 starts, driving the lever 402 to rotate and agitate the wet material in the separation frame 401. At the same time, the electric push rod 405 can intermittently or continuously push the mounting plate 403, drive motor 404 and lever 402 to move up and down as a whole, to avoid the screen frame from clogging and further separate the residual water. The water is discharged through the drain pipe on the right side of the separation box 4 through the separation frame 401. The lithium carbonate solid that has undergone secondary dehydration remains in the screen frame and can be taken out for subsequent processing.

[0032] In the description of this utility model, it should be understood that the terms "left", "right", "up", "down", "top", "bottom", "front", "back", "inner", "outer", "back", "middle", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They 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. Therefore, they should not be construed as limitations on this utility model.

[0033] However, the above description is only a specific embodiment of this utility model and should not be construed as limiting the scope of implementation of this utility model. Therefore, any substitution of equivalent components or equivalent changes and modifications made in accordance with the scope of protection of this utility model should still fall within the scope of the claims of this utility model.

Claims

1. A lithium carbonate production lithium sinking centrifuge comprising an outer cylinder (1), characterized in that: The outer cylinder (1) is equipped with a centrifugal mechanism inside, and a separation mechanism is provided at the lower right side of the outer cylinder (1); The centrifugal mechanism includes a mesh rotating drum (2) disposed inside the outer cylinder (1), a protrusion (201) fixedly connected to the inner wall of the rotating drum (2), an inlet pipe (202) connected to one end of the rotating drum (2) and extending to the outside of the outer cylinder (1), a large gear (203) fixedly connected to the outer wall of the inlet pipe (202), a small gear (204) meshing with the large gear (203), and a servo motor (205) fixedly connected to the small gear (204) at the output end. The separation mechanism includes a separation box (4) connected to the outer cylinder (1) via a material conveying mechanism, a separation mesh frame (401) disposed inside the separation box (4), a lever (402) disposed inside the separation mesh frame (401), a mounting plate (403) disposed inside the separation box (4), a drive motor (404) mounted on the upper surface of the mounting plate (403) and whose output end is fixedly connected to the lever (402), and two electric push rods (405) mounted on the upper surface of the separation box (4) and whose output end is fixedly connected to the mounting plate (403).

2. The lithium carbonate production lithium sinking centrifuge according to claim 1, characterized in that: The material conveying mechanism includes a conveying cylinder (3) connected to the other end of the rotating cylinder (2), and a conveying auger (301) rotatably connected inside the conveying cylinder (3).

3. The lithium carbonate production lithium setting centrifuge according to claim 1, characterized in that: The top of the separation box (4) has a through hole, and the right side of the separation box (4) is connected to a drain pipe.

4. The lithium carbonate production lithium sinking centrifuge according to claim 2, characterized in that: The bottom end of the outer cylinder (1) is connected to a liquid outlet pipe (101), and the bottom end of the conveying cylinder (3) is connected to a discharge pipe (302) located in the through hole.

5. The lithium carbonate production lithium setting centrifuge according to claim 1, characterized in that: Support blocks are fixedly connected to both the left and right sides of the inner wall of the separation box (4).

6. A lithium carbonate precipitation centrifuge for lithium carbonate preparation according to claim 1, characterized in that: The outer wall of the separation box (4) is equipped with a controller, and the servo motor (205) and the drive motor (404) are both electrically connected to the controller.

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