A lithium extraction equipment for removing impurities and a process for recovering spodumene impurities.

Abstract

This invention provides a lithium extraction device for slag removal and its spodumene slag recovery process, relating to the field of solid waste treatment technology. The device includes a base frame, a processing box, and a feeding mechanism. The processing box is located above the base frame. The feeding mechanism includes a feeding frame fixed to the top of the processing box, a top plate fixed to the inner wall of the feeding frame, transverse grooves on both sides of the top plate inside the feeding frame, and an inner plate fixed to the bottom of the feeding frame on one side of the top plate. This solution removes the caked slag by rotating the frame, significantly increasing the contact area between the slag and deionized water. This allows residual lithium in the slag to be fully exposed in the deionized water, creating favorable conditions for the subsequent lithium leaching reaction and effectively enhancing the lithium leaching potential. The fine grinding effect of the rotary crusher and the strong mixing effect of the oblique tumbling work together to make the lithium leaching reaction more thorough, while also saving the time spent mixing and preparing the slurry from the slag and deionized water.

Description

Technical Field

[0001] This invention relates to the field of solid waste treatment, and in particular to a lithium extraction equipment for removing impurities from slag and a process for recovering spodumene impurities from spodumene. Background Technology

[0002] In the industrial production process of lithium carbonate from spodumene, after acid leaching of brine, a purification operation is required to remove impurities such as calcium and magnesium ions. Usually, sodium hydroxide is added first to remove magnesium ions, and magnesium hydroxide precipitate is generated in the reaction. At the same time, due to the presence of impurities in the raw materials, a small amount of calcium hydroxide precipitate will be generated, and some lithium ions in the solution will also generate a small amount of lithium hydroxide. The primary impurity removal residue generated after filtration is mainly composed of magnesium hydroxide, and contains a small amount of calcium hydroxide and a small amount of water-soluble lithium hydroxide.

[0003] The treatment methods for primary waste removal residue are relatively simple, and large amounts of waste residue are piled up or simply landfilled, which not only occupies a lot of land resources, but may also pollute the soil and water. At the same time, the lithium element contained in it, as an important strategic resource, has not been fully recycled and utilized, resulting in resource waste.

[0004] In existing technologies, spodumene residue needs to be mixed with deionized water during the lithium extraction process. During the mixing process, the residue is usually dewatered by pressure filtration. The surface of the particles contains colloids, fine mud, and silicate-like sticky substances, which are very easy to agglomerate and clump. Directly participating in lithium extraction with deionized water can easily lead to incomplete lithium extraction and prolong the lithium extraction time.

[0005] Therefore, it is necessary to provide a lithium extraction equipment for removing impurities and a process for recovering spodumene impurities to solve the above-mentioned technical problems. Summary of the Invention

[0006] This invention provides a lithium extraction equipment for removing impurities and a process for recovering spodumene impurities, which solves the problem in related technologies that spodumene impurities easily form agglomerates and clumps, affecting the lithium extraction effect and thus prolonging the lithium extraction time.

[0007] To solve the above-mentioned technical problems, the present invention provides a lithium extraction device for removing impurities from slag, comprising a base frame, a processing box, and a feeding mechanism;

[0008] The processing box is located above the base frame. The unloading mechanism includes an unloading frame fixed to the top of the processing box. A top plate is fixed to the inner wall of the unloading frame. Horizontal grooves are formed inside the unloading frame and on both sides of the top plate. An inner plate is fixed to the bottom of the unloading frame and on one side of the top plate. A unloading plate is rotatably connected to the top of the inner plate. An electric cylinder is installed inside the unloading frame and below the top plate. A sliding plate is installed at the output end of the electric cylinder. A rack is fixed to the outer wall of the sliding plate and inside the two horizontal grooves. A unloading gear is meshed to the top of the rack. A rotating frame is connected to the shaft of the unloading gear via a keyway.

[0009] A positioning frame is fixedly installed on the side wall of the inner plate, and a lifting rod is slidably connected inside the positioning frame. A guide wheel is installed at the bottom end of the lifting rod, and a trigger plate is installed on the top of the slide plate.

[0010] Preferably, the two sides of the feeding plate are in contact with the inner wall of the feeding frame, and the sliding plate and the rack slide back and forth in the horizontal direction about the transverse groove.

[0011] Preferably, the shaft of the feeding gear is rotatably connected to the inner wall of the feeding frame via a bearing, and the top of the guide wheel and the trigger plate are in contact with each other.

[0012] Preferably, the top end of the lifting rod and the bottom end of the feeding plate are in contact with each other, and the lifting rod reciprocates vertically about the positioning frame.

[0013] Preferably, it also includes a mixing mechanism;

[0014] The processing box is equipped with a cover plate on top. The mixing mechanism includes a motor installed on the top of the cover plate. A positioning plate is fixedly provided on the inner wall of the processing box. The motor output shaft is connected to a mixing frame via a keyway. A first gear is connected to the outer wall of the mixing frame above the positioning plate via a keyway. The mixing frame and the positioning plate are rotatably connected.

[0015] Preferably, it also includes auxiliary mechanisms;

[0016] The auxiliary mechanism includes a mounting bracket fixed to the bottom of the cover plate. A second gear is meshed with one side of the first gear. A drive rod is connected to the shaft of the second gear via a keyway. A ratchet sleeve is rotatably connected inside the mounting bracket. A ratchet wheel is connected to the shaft of the drive rod via a keyway. A rotating shaft is connected to the shaft of the ratchet sleeve via a keyway. An eccentric plate is connected to the shaft via a keyway. A positioning wheel is rotatably connected to the outer wall of the eccentric plate. A rotating rod is rotatably connected to the inner wall of the processing box. A flap is installed on the top of the rotating rod. A reciprocating groove plate is fixedly installed at one end of the rotating rod.

[0017] Preferably, the drive rod and the mounting bracket are rotatably connected, and the ratchet and the ratchet sleeve mesh with each other.

[0018] Preferably, the outer wall of the positioning wheel and the inner wall of the reciprocating groove plate are in close contact with each other, and the mounting frame and the positioning plate are designed as an integrated unit.

[0019] The process for recovering impurities from spodumene includes the following steps:

[0020] S1: Add the impurity-removing residue to deionized water to make pulp, wash and filter to obtain lithium-containing filtrate A and filter residue A. The lithium-containing filtrate is evaporated and concentrated to precipitate lithium in the form of lithium hydroxide crystals. The pulping process needs to be completed in the lithium extraction equipment for impurity-removing residue.

[0021] S2: Dry and sieve the filter residue A;

[0022] S3: Add diatomaceous earth and activated carbon powder to the sieved powder and stir to mix;

[0023] S4: Add an aqueous solution to the uniformly mixed material to form a honeycomb structure;

[0024] S5: The formed adsorbent is calcined and activated, and then cooled to obtain a composite flue gas desulfurization adsorbent.

[0025] Compared with related technologies, the lithium extraction equipment and spodumene slag recovery process provided by the present invention have the following beneficial effects:

[0026] By removing the caked slag by rotating the rack, the contact area between the slag and deionized water can be greatly increased, allowing the residual lithium in the slag to be fully exposed in the deionized water, creating favorable conditions for the subsequent lithium leaching reaction and effectively improving the lithium leaching potential.

[0027] Meanwhile, the flip-type feeding plate can flip the impurities of different volumes towards the rotating frame, thereby further avoiding the phenomenon of material blockage. The fine grinding effect of rotary crushing and the strong mixing effect of oblique flipping work together to make the lithium leaching reaction more thorough, and at the same time save the working time of mixing impurities and deionized water to make pulp.

[0028] This solution is applied to the treatment of solid waste from spodumene residue. By recycling the residue and extracting lithium and preparing adsorbents, the amount of waste residue can be reduced, environmental pollution can be decreased, and the reduction, resource utilization, and harmless treatment of industrial solid waste can be truly realized. This improves resource utilization and environmental benefits, and has significant economic and social value. Attached Figure Description

[0029] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on the structures shown in these drawings without creative effort.

[0030] Figure 1 The optimal structural schematic diagram provided for this invention;

[0031] Figure 2 for Figure 1 The diagram shows the overall structure of the processing box.

[0032] Figure 3 for Figure 1 The diagram shows the structure of the feeding mechanism;

[0033] Figure 4 for Figure 3 The diagram shows a cross-sectional view of the feeding mechanism.

[0034] Figure 5 for Figure 4 The diagram shows a side view of the structure.

[0035] Figure 6 for Figure 5 The diagram shows the working state of the rack and pinion moving back and forth, driving the rotating frame to rotate and simultaneously causing the feed plate to flip.

[0036] Figure 7 This is a schematic diagram of the hybrid mechanism structure shown in the present invention;

[0037] Figure 8 for Figure 7 The enlarged structural diagram at point A is shown below;

[0038] Figure 9 A schematic diagram of the working state of the auxiliary mechanism provided by the present invention;

[0039] Figure 10 The process flow diagram for the recovery of spodumene residue provided by this invention.

[0040] Explanation of icon numbers:

[0041] 1. Base frame; 2. Processing box;

[0042] 3. Feeding mechanism; 31. Feeding frame; 32. Top plate; 33. Horizontal groove; 34. Inner plate; 35. Electric cylinder; 36. Slide plate; 37. Rack and pinion; 38. Feeding gear; 39. Rotating frame.

[0043] 310. Feeding plate; 311. Positioning frame; 312. Trigger plate; 313. Lifting rod; 314. Guide wheel;

[0044] 4. Mixing mechanism; 41. Motor; 42. Positioning plate; 43. Mixing frame; 44. First gear;

[0045] 5. Auxiliary mechanism; 51. Mounting bracket; 52. Second gear; 53. Drive rod; 54. Ratchet; 55. Ratchet sleeve; 56. Rotating shaft; 57. Eccentric plate; 58. Positioning wheel; 59. Rotating rod; 510. Flip plate; 511. Reciprocating groove plate.

[0046] 6. Cover plate. Detailed Implementation

[0047] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the scope of protection of the present invention.

[0048] This invention provides a lithium extraction equipment for removing impurities and a process for recovering impurities from spodumene.

[0049] First embodiment:

[0050] Please see Figures 1 to 6 A lithium extraction device for removing impurities and slag includes a base frame 1, a processing box 2, and a feeding mechanism 3;

[0051] The processing box 2 is located above the base frame 1. The unloading mechanism 3 includes an unloading frame 31 fixed to the top of the processing box 2. A top plate 32 is fixed to the inner wall of the unloading frame 31. Horizontal grooves 33 are opened inside the unloading frame 31 and on both sides of the top plate 32. An inner plate 34 is fixed to the bottom of the unloading frame 31 and on one side of the top plate 32. An unloading plate 310 is rotatably connected to the top of the inner plate 34. An electric cylinder 35 is installed inside the unloading frame 31 and below the top plate 32. A sliding plate 36 is installed at the output end of the electric cylinder 35. A rack 37 is fixed to the outer wall of the sliding plate 36 and inside the two horizontal grooves 33. An unloading gear 38 is meshed to the top of the rack 37. A rotating frame 39 is connected to the shaft of the unloading gear 38 via a keyway.

[0052] A positioning frame 311 is fixedly installed on the side wall of the inner plate 34. A lifting rod 313 is slidably connected inside the positioning frame 311. A guide wheel 314 is installed at the bottom end of the lifting rod 313. A trigger plate 312 is installed on the top of the slide plate 36.

[0053] The two sides of the feeding plate 310 are in contact with the inner wall of the feeding frame 31, and the sliding plate 36 and the rack 37 slide back and forth in the horizontal direction about the transverse groove 33.

[0054] The feeding gear 38 is rotatably connected to the inner wall of the feeding frame 31 via a bearing at its shaft center, and the top of the guide wheel 314 and the trigger plate 312 are in contact with each other.

[0055] The top of the lifting rod 313 and the bottom of the unloading plate 310 are in contact with each other, and the lifting rod 313 reciprocates vertically about the positioning frame 311.

[0056] Please see Figure 3 and Figure 4Users can unload the slag from the inclined feeding plate 310. The slag can fall from the inclined feeding plate 310 into the rotating frame 39, and then fall into the processing box 2 through the opening at the bottom of the rotating frame 39.

[0057] Please see Figure 5 and Figure 6 The user starts the electric cylinder 35 to control the slide plate 36 to drive the rack 37 to move from the right to the left. During the movement of the rack 37, it can mesh with the feeding gear 38 to rotate. During the rotation of the feeding gear 38, it drives the rotating frame 39 to rotate as a whole. When the rotating frame 39 rotates, it can mechanically separate and crush the clump of impurities.

[0058] Secondly, when the slide plate 36 moves, the trigger plate 312 moves from the right to the left. During the movement, when the inclined surface of the trigger plate 312 moves to the position of the guide wheel 314, the guide wheel 314 can follow the inclined surface of the trigger plate 312 to control the lifting rod 313 to rise. During the rise, the force controls the feeding plate 310 to flip along the hinge of the inner plate 34. During the flipping process, the impurities above can be flipped and shaken to the position of the rotating frame 39.

[0059] Impurities and deionized water are mixed and slurried in treatment tank 2 to form a lithium-containing liquid.

[0060] It is understandable: since the rack 37 and the feeding gear 38 are driven inside the transverse groove 33, the rack 37 and the feeding gear 38 will not be jammed when removing slag.

[0061] Please see Figure 1 and Figure 2 In one application, the lithium extraction equipment for removing impurities can be used to pulp and extract lithium from spodumene filter residue.

[0062] When extracting lithium from spodumene filter residue, the spodumene filter residue is fed from the feeding mechanism 3 into the processing tank 2 to participate in pulping and lithium extraction. The specific feeding, pulping and lithium extraction process is as described above.

[0063] In another application, the aforementioned lithium extraction equipment can also be used to extract lithium from waste spodumene materials through pulping.

[0064] This embodiment:

[0065] In the lithium extraction process of spodumene impurity slag and deionized water, a rotary crushing and feeding combined with a tilting feeding design is adopted. This design has significant advantages in impurity slag treatment, solid-liquid mixing efficiency and lithium extraction effect. It enables immediate fine grinding of impurity slag, increases the reaction specific surface area, and removes the caking impurity slag through the rotating frame 39. This greatly increases the contact area between the impurity slag and deionized water, allowing the residual lithium element in the slag to be fully exposed in the deionized water, creating favorable conditions for the subsequent lithium leaching reaction and effectively improving the lithium leaching potential.

[0066] Meanwhile, the flip-type feeding plate 310 can flip the slag of different volumes towards the rotating frame 39, thereby further avoiding the phenomenon of material blockage. The fine grinding effect of rotary crushing and the strong mixing effect of oblique flipping work together to make the lithium leaching reaction more thorough, and at the same time save the working time of mixing slag and deionized water for pulping.

[0067] This solution is applied to the treatment of solid waste from spodumene residue. By recycling the residue and extracting lithium and preparing adsorbents, the amount of waste residue can be reduced, environmental pollution can be decreased, and the reduction, resource utilization, and harmless treatment of industrial solid waste can be truly realized. This improves resource utilization and environmental benefits, and has significant economic and social value.

[0068] Second embodiment:

[0069] Please see Figures 7 to 9 It also includes a hybrid mechanism 4;

[0070] The processing box 2 is equipped with a cover plate 6 on top. The mixing mechanism 4 includes a motor 41 installed on the top of the cover plate 6. A positioning plate 42 is fixedly provided on the inner wall of the processing box 2. The output shaft of the motor 41 is connected to a mixing frame 43 via a keyway. A first gear 44 is connected to the outer wall of the mixing frame 43 above the positioning plate 42 via a keyway. The mixing frame 43 and the positioning plate 42 are rotatably connected.

[0071] Please see Figure 7 and Figure 8 The user starts the motor 41 to rotate forward and backward. When the motor 41 rotates forward and backward, it can control the mixing rack 43 to rotate forward and backward. The mixing rack 43 rotates forward and backward in the processing box 2 to fully mix the impurities and deionized water to make pulp.

[0072] Furthermore, when the mixing frame 43 rotates, it can synchronously drive the first gear 44 to rotate, and the mixing frame 43 can control the forward and reverse rotation of the first gear 44.

[0073] It is understandable that the mixing frame 43 can only rotate independently when it rotates counterclockwise, and the auxiliary mechanism 5 can only be controlled to rotate synchronously when the mixing frame 43 rotates clockwise.

[0074] This embodiment:

[0075] By thoroughly mixing the spodumene impurity removal residue and deionized water using the mixing rack 43, material agglomerates and clumps can be quickly broken up, ensuring that the solid and liquid phases are fully mixed and evenly dispersed. This prevents the residue from settling, accumulating, and caking, forming a stable and uniform lithium extraction slurry, which provides a good slurry preparation foundation for subsequent lithium leaching.

[0076] Secondly, the mixing frame 43 can rotate clockwise and counterclockwise. When the mixing frame 43 rotates counterclockwise, it will not drive the auxiliary mechanism 5 to rotate. The mixing frame 43 rotates independently, which is suitable for the later pulping stage. When the mixing frame 43 rotates clockwise, it can drive the auxiliary mechanism 5 to work simultaneously, which is suitable for the feeding and mixing stage.

[0077] Third embodiment:

[0078] Please see Figures 7 to 9 It also includes auxiliary mechanism 5;

[0079] The auxiliary mechanism 5 includes a mounting bracket 51 fixed to the bottom of the cover plate 6. A second gear 52 is meshed with one side of the first gear 44. A drive rod 53 is connected to the keyway at the center of the second gear 52. A ratchet sleeve 55 is rotatably connected inside the mounting bracket 51. A ratchet wheel 54 is connected to the keyway at the center of the drive rod 53. A rotating shaft 56 is connected to the keyway at the center of the ratchet sleeve 55. An eccentric plate 57 is connected to the keyway at the center of the rotating shaft 56. A positioning wheel 58 is rotatably connected to the outer wall of the eccentric plate 57. A rotating rod 59 is rotatably connected to the inner wall of the processing box 2. A flip plate 510 is installed on the top of the rotating rod 59. A reciprocating groove plate 511 is fixedly installed at one end of the rotating rod 59.

[0080] The drive rod 53 and the mounting bracket 51 are rotatably connected, and the ratchet 54 and the ratchet sleeve 55 mesh with each other.

[0081] The outer wall of the positioning wheel 58 and the inner wall of the reciprocating groove plate 511 are in close contact with each other, and the mounting bracket 51 and the positioning plate 42 are integrated into one piece.

[0082] Please see Figure 7 and Figure 8 In the second embodiment, during the rotation of the first gear 44, the second gear 52 is engaged and rotates. When the second gear 52 rotates and drives the drive rod 53 to rotate counterclockwise, the drive rod 53 controls the ratchet 54 to rotate counterclockwise. The ratchet 54 rotates counterclockwise and avoids the ratchet sleeve 55, so it will not control the ratchet sleeve 55 to control the auxiliary mechanism 5 to rotate.

[0083] Please see Figure 9When the ratchet sleeve 55 rotates, it can drive the rotating shaft 56 to control the eccentric plate 57 to form an eccentric rotational motion. When the eccentric plate 57 rotates, it drives the positioning wheel 58 to rotate eccentrically. The positioning wheel 58 is subjected to force to control the inner groove of the reciprocating groove plate 511, which causes the rotating rod 59 to drive the flip plate 510 to reciprocate and flip. Therefore, the impurities falling from the rotating frame 39 fall onto the flip plate 510 and can be evenly distributed in the processing box 2.

[0084] This embodiment:

[0085] The reciprocating flipping motion of the flap 510 evenly distributes the crushed slag to the left and right sides of the processing tank 2, ensuring that the crushed spodumene slag is evenly distributed and spread out within the processing tank. This prevents local accumulation and agglomeration of materials, ensuring that the materials are evenly distributed, loose, and breathable within the tank. This creates favorable material conditions for subsequent solid-liquid mixing and lithium leaching. At the same time, it allows the slag to fully and evenly contact deionized water, significantly improving the leaching efficiency and completeness of lithium, reducing the problem of incomplete lithium leaching caused by material accumulation and encapsulation, and increasing the lithium resource recovery rate.

[0086] The process for recovering impurities from spodumene includes the following steps:

[0087] S1: Add an appropriate amount of deionized water to the lithium extraction slag from spodumene for pulping, controlling the pulp concentration to 20%-40%. Then, use a three-stage countercurrent washing process, adjusting the temperature to 50℃-60℃, with each stage of washing lasting a certain time. Filter to obtain lithium-containing filtrate A and filter residue A. The lithium-containing filtrate is evaporated and concentrated to gradually increase the lithium concentration in the solution. When the solution reaches a supersaturated state, lithium is precipitated in the form of lithium hydroxide crystals through evaporation crystallization. The pulping process needs to be completed in the lithium extraction equipment with impurity removal slag.

[0088] S2: Place filter residue A in an oven and dry it at a certain temperature for a period of time to remove moisture. After drying, the filter residue is ground in an agate crucible and sieved through a certain mesh to increase the reaction activity and specific surface area.

[0089] S3: Add a certain proportion of diatomaceous earth and activated carbon powder to the sieved powder and place it in a stirring device and stir at a certain stirring speed for a period of time to make it fully mixed in order to improve the performance of the adsorbent.

[0090] S4: Add 5%-10% sodium carboxymethyl cellulose aqueous solution to the uniformly mixed material, knead and press to form the material into a honeycomb structure;

[0091] S5: The formed adsorbent is placed in a horizontal tube furnace and calcined at a specific temperature at a certain heating rate under argon atmosphere protection for a period of time to activate it and improve its adsorption performance. After calcination, it is cooled with the furnace to obtain the composite flue gas desulfurization adsorbent.

[0092] The waste residue is processed in stages. First, the valuable lithium element is recovered. Then, the remaining residue is converted into a composite flue gas desulfurization adsorbent. This achieves multi-level and multi-purpose resource utilization of the same waste residue, which greatly improves the resource utilization rate and reduces the environmental impact of the waste residue.

[0093] The method of removing lithium elements from lithium slag and using the remaining components to prepare composite flue gas desulfurization adsorbents innovatively realizes the recycling of resources, solves the pollution problem of slag removal, and creates new economic benefits, demonstrating significant innovation and application value.

[0094] To achieve the resource utilization of primary waste residue, on the one hand, lithium elements are efficiently recovered, improving the utilization rate of lithium resources and reducing production costs; on the other hand, the remaining residue is prepared into high-performance composite flue gas desulfurization adsorbents for industrial flue gas desulfurization, reducing environmental pollution and achieving the dual effect of resource recovery and environmental protection.

[0095] Please refer to the reference again. Figures 1 to 10 The working principle of the lithium extraction equipment and spodumene slag recovery process provided by this invention is as follows:

[0096] Step S1: The slag is fed from the inclined feeding plate 310. The electric cylinder 35 is started to control the slide plate 36 to drive the rack 37 to move from the right to the left. During the movement of the rack 37, it can mesh with the feeding gear 38 to rotate. During the rotation of the feeding gear 38, it drives the rotating frame 39 to rotate as a whole. When the rotating frame 39 rotates, it can mechanically separate and crush the slag.

[0097] As the slide plate 36 moves, the trigger plate 312 moves synchronously from the right to the left. During the movement, when the inclined surface of the trigger plate 312 moves to the position of the guide wheel 314, the guide wheel 314 can follow the inclined surface of the trigger plate 312 to control the lifting rod 313 to move upward. During the upward movement, the force controls the feeding plate 310 to flip along the hinge of the inner plate 34. During the flipping process, the impurity slag above can be flipped and shaken to the position of the rotating frame 39. Then, deionized water is injected into the processing box 2 for pulping and lithium extraction.

[0098] Step S2: Start the motor 41 to rotate forward and backward. When the motor 41 rotates forward and backward, it can control the mixing frame 43 to rotate forward and backward. The mixing frame 43 rotates forward and backward in the processing box 2 to fully mix the impurities and deionized water to make pulp. When the mixing frame 43 rotates clockwise, it can drive the ratchet sleeve 55 to rotate, which can drive the rotating shaft 56 to control the eccentric plate 57 to form an eccentric rotation. When the eccentric plate 57 rotates, it drives the positioning wheel 58 to rotate eccentrically. The positioning wheel 58 is force-controlled to control the inner groove of the reciprocating groove plate 511, which causes the rotating rod 59 to drive the flip plate 510 to reciprocate and flip. Therefore, the impurities falling from the rotating frame 39 fall onto the flip plate 510 and can be evenly distributed in the processing box 2.

[0099] The above description is only a preferred embodiment of the present invention and does not limit the patent scope of the present invention. All equivalent structural transformations made under the concept of the present invention using the contents of the present invention specification and drawings, or direct / indirect applications in other related technical fields, are included within the patent protection scope of the present invention.

Claims

1. A lithium extraction device for removing impurities from slag, characterized in that, Includes the base frame, processing box, and unloading mechanism; The processing box is located above the base frame. The unloading mechanism includes an unloading frame fixed to the top of the processing box. A top plate is fixed to the inner wall of the unloading frame. Horizontal grooves are formed inside the unloading frame and on both sides of the top plate. An inner plate is fixed to the bottom of the unloading frame and on one side of the top plate. A unloading plate is rotatably connected to the top of the inner plate. An electric cylinder is installed inside the unloading frame and below the top plate. A sliding plate is installed at the output end of the electric cylinder. A rack is fixed to the outer wall of the sliding plate and inside the two horizontal grooves. A unloading gear is meshed to the top of the rack. A rotating frame is connected to the shaft of the unloading gear via a keyway. A positioning frame is fixedly installed on the side wall of the inner plate, and a lifting rod is slidably connected inside the positioning frame. A guide wheel is installed at the bottom end of the lifting rod, and a trigger plate is installed on the top of the slide plate.

2. The lithium extraction equipment for removing impurities from slag according to claim 1, characterized in that, The two sides of the feeding plate are in contact with the inner wall of the feeding frame, and the sliding plate and the rack slide back and forth in the horizontal direction about the transverse groove.

3. The lithium extraction equipment for removing impurities from slag according to claim 1, characterized in that, The feed gear shaft is rotatably connected to the inner wall of the feed frame via a bearing, and the guide wheel and the top of the trigger plate are in contact with each other.

4. The lithium extraction equipment for removing impurities from slag according to claim 1, characterized in that, The top of the lifting rod and the bottom of the unloading plate are in contact with each other, and the lifting rod moves up and down vertically about the positioning frame.

5. The lithium extraction equipment for removing impurities from slag according to claim 1, characterized in that, It also includes hybrid mechanisms; The processing box is equipped with a cover plate on top. The mixing mechanism includes a motor installed on the top of the cover plate. A positioning plate is fixedly provided on the inner wall of the processing box. The motor output shaft is connected to a mixing frame via a keyway. A first gear is connected to the outer wall of the mixing frame above the positioning plate via a keyway. The mixing frame and the positioning plate are rotatably connected.

6. The lithium extraction equipment for removing impurities from slag according to claim 5, characterized in that, It also includes auxiliary mechanisms; The auxiliary mechanism includes a mounting bracket fixed to the bottom of the cover plate. A second gear is meshed with one side of the first gear. A drive rod is connected to the shaft of the second gear via a keyway. A ratchet sleeve is rotatably connected inside the mounting bracket. A ratchet wheel is connected to the shaft of the drive rod via a keyway. A rotating shaft is connected to the shaft of the ratchet sleeve via a keyway. An eccentric plate is connected to the shaft via a keyway. A positioning wheel is rotatably connected to the outer wall of the eccentric plate. A rotating rod is rotatably connected to the inner wall of the processing box. A flap is installed on the top of the rotating rod. A reciprocating groove plate is fixedly installed at one end of the rotating rod.

7. The lithium extraction equipment for removing impurities from slag according to claim 6, characterized in that, The drive rod and the mounting bracket are rotatably connected, and the ratchet and the ratchet sleeve mesh with each other.

8. The lithium extraction equipment for removing impurities from slag according to claim 6, characterized in that, The outer wall of the positioning wheel and the inner wall of the reciprocating groove plate are in close contact with each other, and the mounting frame and the positioning plate are designed as an integrated unit.

9. A process for recovering impurities from spodumene slag, characterized in that, Includes the following steps: S1: Add the impurity-removing residue to deionized water to make pulp, wash and filter to obtain lithium-containing filtrate A and filter residue A, and evaporate and concentrate the lithium-containing filtrate to precipitate lithium in the form of lithium hydroxide crystals. The pulping process needs to be completed in the lithium extraction equipment for impurity-removing residue as described in any one of claims 1-8. S2: Dry and sieve the filter residue A; S3: Add diatomaceous earth and activated carbon powder to the sieved powder and stir to mix; S4: Add an aqueous solution to the uniformly mixed material to form a honeycomb structure; S5: The formed adsorbent is calcined and activated, and then cooled to obtain a composite flue gas desulfurization adsorbent.

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