Lithium slag treatment process

Abstract

The invention provides a lithium slag treatment process which comprises the following preparation processes: S1, pretreatment: drying lithium slag, removing moisture, and then crushing and grinding to enable the particle size of lithium slag particles to be less than 100 meshes; s2, acid leaching: mixing the pretreated lithium slag with a sulfuric acid solution with a certain concentration, and carrying out acid leaching under the conditions of heating and stirring; S3, filtering: after the acid leaching reaction is finished, filtering to obtain a leaching solution and leaching slag; s4, extraction: mixing the leachate with an extraction agent, and carrying out extraction separation; s5, back extraction: carrying out back extraction on the extracted organic phase to obtain back extraction liquid rich in valuable metals; s6, precipitation, wherein the back extraction liquid is subjected to precipitation treatment, and corresponding valuable metal precipitates are obtained; and S7, calcining: calcining the precipitate to obtain a corresponding metal oxide, and improving the recovery rate of valuable metals by utilizing finer crushing of lithium and optimizing process parameters of acid leaching, extraction, back extraction and the like.

Description

Technical Field

[0001] The invention relates to the technical field of lithium slag recovery, and mainly to a lithium slag treatment process. Background Art

[0002] A large amount of lithium-containing slag is produced in the oil refining stage of the production and preparation of metallic lithium, and the mass of these lithium slags is about 3% of the output of metallic lithium, wherein the main components of these lithium slags include metallic lithium, potassium, sodium and their oxides, nitrides and carbides. The metallic lithium waste slag produced in the oil refining stage is usually first soaked in white oil. After being fished out of the white oil, the surface will be evenly covered with a layer of oil film, which prevents the metallic lithium from direct contact with water, oxygen and nitrogen in the air, and plays a role in protecting the metallic lithium waste slag.

[0003] Existing lithium slag recovery devices such as patent number CN202310327321.1, a lithium slag recovery and processing device, including a sealed processing chamber, a quantitative pushing assembly, a gas collection assembly and a circulation assembly, the quantitative pushing assembly obliquely extends into the interior of the sealed processing chamber from the top of the sealed processing chamber, the sealed processing chamber includes a reaction liquid layer at the bottom, and a white oil layer located on the reaction liquid layer, the quantitative pushing assembly pushes the lithium slag from top to bottom, and enters a specific position of the reaction liquid layer after passing through the white oil layer. The metallic lithium slag can be pressed into the sealed processing chamber by the inclined quantitative pushing assembly, and the reaction liquid layer and the white oil layer in the sealed processing chamber can cause the lithium slag to undergo a chemical reaction in a safe environment, and the generated gas is collected by the gas collection assembly at the top of the sealed processing chamber.

[0004] However, in the existing recycling process, when lithium is processed, lithium slag is directly placed in a solution for reaction, and the lithium slag particles are large, which leads to a long reaction time, resulting in a technical problem that the lithium slag processing process is too long. Summary of the invention

[0005] The present invention provides a lithium slag treatment process for solving the technical problem raised in the background technology that in the existing recovery process, when lithium is treated, lithium slag is directly placed in a solution for reaction, and the lithium slag particles are large, resulting in a long reaction time, which leads to a technical problem that the lithium slag treatment process is too long.

[0006] To achieve the above object, the present invention provides the following technical solution: a lithium slag treatment process, comprising the following preparation steps: S1. Pretreatment: drying the lithium slag to remove moisture, and then crushing and grinding the lithium slag to make the particle size of the lithium slag particles less than 100 mesh; S2. Acid leaching: The pretreated lithium slag is mixed with a sulfuric acid solution of a certain concentration, and an acid leaching reaction is carried out under heating and stirring conditions. The reaction temperature is controlled at 80-100°C, the reaction time is 2-4 hours, the concentration of the sulfuric acid solution is 2-4 mol / L, and the liquid-solid ratio is 3-5:1; S3, filtration: After the acid leaching reaction is completed, filtering is performed to obtain a leachate and a leach residue; S4, extraction: the leachate is mixed with an extractant for extraction and separation, the extractant is a mixed extractant of P204 and P507, the volume ratio is 1:1 - 2:1, the extraction process is carried out at room temperature, the stirring speed is 200 - 300 rpm, and the extraction time is 15 - 30 minutes; S5, back extraction: back extract the organic phase after extraction to obtain a back extract solution rich in valuable metals, the back extractant is a hydrochloric acid solution with a concentration of 4-6 mol / L, and the back extraction conditions are the same as the extraction process; S6, precipitation: the stripping solution is subjected to precipitation treatment to obtain the corresponding valuable metal precipitate, and the precipitant is selected according to the different metals, such as sodium carbonate for precipitating lithium, sodium hydroxide for precipitating cobalt, nickel, manganese, etc.; S7. Calcination: Calcinate the precipitate to obtain the corresponding metal oxide. The calcination temperature is adjusted according to different precipitates, generally at 500-800°C, and the calcination time is 2-4 hours.

[0007] Furthermore, the crushing device used in the treatment of the lithium slag in step S1 includes a support frame, a grinding assembly, a filtering assembly, a feeding assembly and a storage box; The support frame is used to support the entire pulverizing equipment as a whole; the grinding assembly is used to grind and crush the lithium slag, and the filtering assembly is used to filter the material ground by the grinding assembly; the feeding assembly is used to feed the filtered material that does not meet the fineness to the grinding assembly for re-grinding; Among them, the grinding assembly includes a grinding jar and a bracket, a support plate is provided above the grinding jar, a drive motor is provided below the support plate, the drive shaft of the drive motor is connected to a rotating rod, the rotating rod is detachably connected to a grinding roller, and a discharge port is provided below the grinding jar, a plurality of material guide grooves are provided above the grinding roller, and the top of the grinding roller is concave toward the material guide groove.

[0008] Furthermore, an annular groove is provided at the lower part of the outer side of the grinding roller, and a plurality of positioning rods are detachably connected to the grinding jar, and the plurality of positioning rods are slidably connected to the annular groove, and a plurality of annular grooves are arranged at an angle downward at the lower rear end, a plurality of sliding grooves are provided at the outer side of the grinding roller, and a plurality of sliding plates are slidably connected to the plurality of sliding grooves, a plurality of cylinders are detachably connected to the rotating rod at the rear end of the sliding plates, and the plurality of cylinders are detachably connected to the rotating rod, and an air hole is provided in the middle part of the rotating rod, and the plurality of cylinders are connected to the air hole, a convex ring is provided at the upper part of the outer side of the rotating rod, and a limiting ring is slidably connected to the outer side of the convex ring, and a connecting hole in the convex ring is connected to the air hole, an air guide pipe is provided on one side of the limiting ring, and one end of the air guide pipe is arranged on the inner side of the limiting ring, the air guide pipe is connected to an air pump, and the air pump is arranged on the outer side of the grinding jar.

[0009] Furthermore, the filter assembly includes two support bars, and the two support bars are detachably connected to the support frame. A first slide groove is provided on one side of the two support bars, and a first screw rod and a first slide rod are respectively provided in the two first slide grooves, and a first drive motor is provided at one end of the first slide groove on one side, and the first drive motor driving shaft is connected to the first screw rod, and the first screw rod and the first slide rod are respectively rotatably connected to two first slide plates, and a vibration assembly is provided on one side of the two first slide plates, and the two vibration assemblies are detachably connected to the filter frame.

[0010] Furthermore, the vibration assembly includes two second slides, a second slide groove is provided on one side of the two first slides, the two second slides are slidably connected to the two second slide grooves respectively, a third slide groove is provided in the second slide groove, a third slide groove is provided in the middle of the two second slides, the third slide groove is slidably connected to the third slide groove, and a telescopic rod is provided on one side of the third slide groove, one end of the telescopic rod is detachably connected to one end of the third slide groove, and a second drive motor is provided on the second slide groove, the drive shaft of the second drive motor is connected to a triangular plate, the triangular plate is extruded and connected to the inner wall of one end of the third slide groove, and the two second drive motors are synchronous motors.

[0011] Furthermore, two convex strips are provided on one side of the filter frame, and a fourth slide groove is provided on one side of the two convex strips. A filter plate is provided under the filter frame, and the filter plate is slidably connected to the two fourth slide grooves, and a second protrusion is provided on one side of the filter plate, and a second electric telescopic rod is provided in the two fourth slide grooves, and one end of the second electric telescopic rod is detachably connected to the second protrusion.

[0012] Furthermore, the feeding assembly includes a vertical pipe, a fourth drive motor is provided below the vertical pipe, the drive shaft of the fourth drive motor is connected to the spiral shaft, blades are provided on the outside of the spiral shaft, the blades are slidably connected to the inner wall of the vertical pipe, a feed bin is provided below the outside of the vertical pipe, a discharge port is provided above the outside of the vertical pipe, the discharge port is detachably connected to a material guide pipe, and the material guide pipe is located above the material guide trough.

[0013] Compared with the prior art, the present invention has the following beneficial effects: 1. The recovery process of the present invention is simple and easy to operate, the operating conditions are mild, and it is easy to industrialize production.

[0014] 2. By optimizing the process parameters such as acid leaching, extraction, and stripping, the recovery rate of valuable metals is improved. The recovery rate of lithium can reach more than 90%, and the recovery rates of metals such as cobalt, nickel, and manganese are also above 85%.

[0015] 3. The entire process is environmentally friendly and pollution-free, meeting the requirements of sustainable development. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 It is a schematic diagram of the structure of the present invention; Figure 2 is an orthographic projection diagram of the grinding roller of the present invention; Figure 3 is a partial enlarged schematic diagram of the grinding assembly of the present invention; Figure 4 It is a schematic diagram of the structure of the vibration assembly of the present invention; Figure 5 It is a schematic diagram of the filter frame structure of the present invention.

[0017] In the figure: 1, support frame; 2, grinding assembly; 21, grinding tank; 211, positioning rod; 22, bracket; 23, support plate; 24, driving motor; 25, rotating rod; 251, air hole; 252, convex ring; 253, limiting ring; 254, air guide tube; 255, air pump; 26, grinding roller; 261, guide groove; 262, annular groove; 263, sliding groove; 264, sliding plate; 265, cylinder; 3, filter assembly; 31, support bar; 311, first slide groove; 312, first screw rod; 313, first slide rod; 32, first Slide plate; 321, second slide groove; 33, vibration assembly; 331, second slide plate; 332, third slide plate; 333, third slide groove; 334, telescopic rod; 335, second drive motor; 336, triangular plate; 34, filter frame; 341, convex strip; 342, fourth slide groove; 343, filter plate; 344, second convex block; 345, second electric telescopic rod; 4, feeding assembly; 41, vertical pipe; 42, fourth drive motor; 43, spiral shaft; 44, blade; 45, feed bin; 46, discharge port; 47, guide pipe, 5, storage box. DETAILED DESCRIPTION

[0018] To facilitate understanding of the present invention, the present invention will be described more comprehensively below with reference to the relevant drawings. Several embodiments of the present invention are given in the drawings, but the present invention can be implemented in different forms and is not limited to the embodiments described in the text. On the contrary, these embodiments are provided to make the content disclosed in the present invention more thorough and comprehensive.

[0019] It should be noted that when an element is referred to as being "fixed on" another element, it may be directly on the other element or there may be a central element. When an element is considered to be "connected to" another element, it may be directly connected to the other element or there may be a central element at the same time. The terms "vertical", "horizontal", "left", "right" and similar expressions used in this article are for illustrative purposes only.

[0020] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly connected by technicians in the technical field of the present invention. The terms used in the specification of the present invention are only for the purpose of describing specific embodiments and are not intended to limit the present invention. The term "and / or" used in this article includes any and all combinations of one or more related listed items.

[0021] For examples, please refer to the attached Figure 1-3 , a lithium slag treatment process, comprising the following preparation processes: S1. Pretreatment: drying the lithium slag to remove moisture, and then crushing and grinding the lithium slag to make the particle size of the lithium slag particles less than 100 mesh; S2, acid leaching: the pretreated lithium slag is mixed with a certain concentration of sulfuric acid solution, and the acid leaching reaction is carried out under heating and stirring conditions. The reaction temperature is controlled at 80-100℃, and the reaction time is 2-4 hours. The concentration of the sulfuric acid solution is 2-4 mol / L, and the liquid-solid ratio is 3-5:1; S3, filtration: After the acid leaching reaction is completed, filtering is performed to obtain a leachate and a leach residue; S4, extraction: the leaching solution is mixed with the extractant for extraction and separation. The extractant is a mixed extractant of P204 and P507, with a volume ratio of 1:1 - 2:1. The extraction process is carried out at room temperature, the stirring speed is 200 - 300 rpm, and the extraction time is 15 - 30 minutes.

[0022] S5, back extraction: back extract the organic phase after extraction to obtain a back extract solution rich in valuable metals. The back extractant is a hydrochloric acid solution with a concentration of 4 - 6 mol / L. The back extraction conditions are the same as the extraction process; S6, precipitation: the stripping solution is subjected to precipitation treatment to obtain the corresponding valuable metal precipitate. The precipitant is selected according to the different metals, such as sodium carbonate for precipitation of lithium, sodium hydroxide for precipitation of cobalt, nickel, manganese, etc.; S7, Calcination: Calcinate the precipitate to obtain the corresponding metal oxide. The calcination temperature is adjusted according to different precipitates, generally between 500-800°C, and the calcination time is 2-4h.

[0023] The crushing device used in the treatment of lithium slag in step S1 includes a support frame 1, a grinding assembly 2, a filtering assembly 3, a feeding assembly 4 and a storage box 5; The support frame 1 is used to support the entire pulverizing equipment; the grinding assembly 2 is used to grind and crush the lithium slag, and the filtering assembly 3 is used to filter the material ground by the grinding assembly 2; the feeding assembly 4 is used to feed the filtered material that does not meet the fineness to the grinding assembly 2 for re-grinding; Among them, the grinding assembly 2 includes a grinding jar 21 and a bracket 22, a support plate 23 is provided above the grinding jar 21, a driving motor 24 is provided below the support plate 23, the driving shaft of the driving motor 24 is connected to the rotating rod 25, the rotating rod 25 is detachably connected to the grinding roller 26, and a discharge port 27 is provided below the grinding jar 21, and a plurality of material guide grooves 261 are provided above the grinding roller 26, and the top of the grinding roller 26 is concave toward the material guide groove 261.

[0024] An annular groove 262 is provided at the lower part of the outer side of the grinding roller 26. A plurality of positioning rods 211 can be detachably connected to the grinding jar 21. The plurality of positioning rods 211 are slidably connected to the annular groove 262. The plurality of annular grooves 262 are arranged to be tilted downward at the lower rear. A plurality of sliding grooves 263 are provided at the outer side of the grinding roller 26. A plurality of sliding plates 264 are slidably connected to the plurality of sliding grooves 263. The rear end of the sliding plate 264 can be detachably connected to a plurality of cylinders 265. The plurality of cylinders 265 can be detachably connected to the rotating rod 25. An air hole 251 is provided in the middle of the rotating rod 25, and multiple cylinders 265 are connected to the air hole 251. A convex ring 252 is provided on the upper outer side of the rotating rod 25. The outer side of the convex ring 252 is slidably connected to a limiting ring 253. The connecting hole in the convex ring 252 is connected to the air hole 251. An air guide tube 254 is provided on one side of the limiting ring 253. One end of the air guide tube 254 is arranged on the inner side of the limiting ring 253. The air guide tube 254 is connected to an air pump 255. The air pump 255 is arranged on the outer side of the grinding jar 21.

[0025] The filter assembly 3 includes two support bars 31, and the two support bars 31 are detachably connected to the support frame 1. A first slide groove 311 is provided on one side of the two support bars 31, and a first screw rod 312 and a first slide rod 313 are respectively provided in the two first slide grooves 311, and a first drive motor 314 is provided at one end of the first slide groove 311 on one side, and the driving shaft of the first drive motor 314 is connected to the first screw rod 312, and the first screw rod 312 and the first slide rod 313 are respectively rotatably connected to the two first slide plates 32, and a vibration assembly 33 is provided on one side of the two first slide plates 32, and the two vibration assemblies 33 are detachably connected to the filter frame 34, and the vibration assembly 33 includes two second slide plates 331, and the two first slide plates A second slide groove 321 is provided on one side of the plate 32, and two second slide plates 32 are slidably connected to the two second slide grooves 321 respectively. A third slide plate 332 is provided in the second slide groove 321, and a third slide groove 333 is provided in the middle of the two second slide plates 332. The third slide plate 332 is slidably connected to the third slide groove 333, and a telescopic rod 334 is provided on one side of the third slide plate 332, one end of the telescopic rod 334 is detachably connected to one end of the third slide groove 333, and a second drive motor 335 is provided on the second slide groove 333, and the driving shaft of the second drive motor 335 is connected to the triangular plate 336, and the triangular plate 336 is squeezed and connected to the inner wall of one end of the third slide groove 333, and the two second drive motors 335 are synchronous motors.

[0026] Two convex strips 341 are provided on one side of the filter frame 34, and a fourth slide groove 342 is provided on one side of the two convex strips 341. A filter plate 343 is provided below the filter frame 34, and the filter plate 343 is slidably connected to the two fourth slide grooves 342. A second convex block 344 is provided on one side of the filter plate 343. A second electric telescopic rod 345 is provided in each of the two fourth slide grooves 342, and one end of the second electric telescopic rod 345 is detachably connected to the second convex block 344. The feeding assembly 4 includes a vertical pipe 41, a fourth driving motor 42 is provided below the vertical pipe 41, the driving shaft of the fourth driving motor 42 is connected to the spiral shaft 43, a blade 44 is provided on the outside of the spiral shaft 43, and the blade 44 is slidably connected to the inner wall of the vertical pipe 41, a feed bin 45 is provided below the outside of the vertical pipe 41, and a discharge port 46 is provided above the outside of the vertical pipe 41. The discharge port 46 is detachably connected to a material guide pipe 47, and the material guide pipe 47 is located above the material guide trough 261.

[0027] Operation principle: When the lithium slag is being crushed and ground, the material is first poured in, and the material is introduced into the sliding groove along the guide groove, and then multiple cylinders are extended, so that the slide slides and connects the sliding groove, and finally the slag is squeezed with the inner wall of the grinding tank, and the grinding roller is driven by the driving motor to rotate, so that the material is correspondingly ground and crushed. Because there are multiple sliding grooves, the material will not be stuck during the grinding process, so that the entire crushing device can be crushed finer to meet the requirements of less than 100 meshes; When crushing, the material that meets the fineness requirements falls from the gap between the grinding roller and the inner wall of the grinding tank to the discharge port and is then filtered accordingly by the filter component. When the material that meets the requirements falls into the storage box, it is collected and processed in the next step.

[0028] The filter assembly passes, and the second driving motor drives the triangular plate to rotate, so that the triangular plate is squeezed and connected to the inner wall of the third slide slot. When the triangular plate is separated from the inner wall of the third slide slot, the telescopic rod rebounds, thereby achieving the vibration effect of the filter frame. When the filtering is completed, the first driving motor rotates to drive the first screw rod to rotate. When the first screw rod and the first slide rod rotate to connect the two first slide plates, the filter frame moves to the specified position, and the two second electric telescopic rods are recovered, so that the filter plate moves outward, and finally the bottom of the filter frame is opened, and the material falls into the feed bin; Then, the corresponding spiral shaft of the feeding assembly rotates accordingly under the rotation of the fourth driving motor, and the material is transported upward under the rotation of the blades. When it reaches the upper discharge port, the material is transported to the guide trough again through the guide pipe for another crushing.

[0029] Although an embodiment of the present invention has been shown and described, this specific embodiment is merely an explanation of the present invention and is not a limitation of the invention. The specific features, structures, materials or characteristics described may be combined in a suitable manner in any one or more embodiments or examples. After reading this specification, those skilled in the art may make modifications, substitutions and variations to the embodiments without creative contributions as needed without departing from the principles and purpose of the present invention. However, as long as they are within the scope of the claims of the present invention, they are protected by patent law.

Claims

1. A lithium slag treatment process, characterized in that: The process comprises the following preparation steps: Step S1, pretreatment: drying the lithium slag to remove moisture, and then crushing and grinding the lithium slag to make the particle size of the lithium slag particles reach less than 100 mesh; Step S2, acid leaching: the pretreated lithium slag is mixed with a sulfuric acid solution of a certain concentration, and an acid leaching reaction is carried out under heating and stirring conditions, the reaction temperature is controlled at 80-100°C, the reaction time is 2-4 h, the concentration of the sulfuric acid solution is 2-4 mol / L, and the liquid-to-solid ratio is 3-5:1; Step S3, filtration: After the acid leaching reaction is completed, filtration is performed to obtain a leachate and a leach residue; Step S4, extraction: the leachate is mixed with an extractant for extraction and separation, the extractant is a mixed extractant of P204 and P507, the volume ratio is 1:1-2:1, the extraction process is carried out at room temperature, the stirring speed is 200-300 rpm, and the extraction time is 15-30 min; Step S5, back extraction: back extracting the organic phase after extraction to obtain a back extract solution rich in valuable metals, the back extracting agent is a hydrochloric acid solution with a concentration of 4-6 mol / L, and the back extraction conditions are the same as the extraction process; Step S6, precipitation: subjecting the stripping solution to precipitation treatment to obtain corresponding valuable metal precipitates; Step S7, calcination: calcine the precipitate to obtain the corresponding metal oxide. The calcination temperature is adjusted according to different precipitates and is controlled between 500-800° C. The calcination time is 2-4 h.

2. A lithium slag treatment process according to claim 1, characterized in that: The lithium slag in step S1 is processed by a crushing device, which comprises a support frame (1), a grinding component (2), a filtering component (3), a feeding component (4) and a storage box (5); The support frame (1) is used to support the entire pulverizing device as a whole; the grinding component (2) is used to grind and pulverize lithium slag; the filtering component (3) is used to filter the material ground by the grinding component (2); the feeding component (4) is used to feed the filtered material that does not meet the fineness into the grinding component (2) for re-grinding; The grinding assembly (2) comprises a grinding jar (21) and a bracket (22); a support plate (23) is provided above the grinding jar (21); a drive motor (24) is provided below the support plate (23); a drive shaft of the drive motor (24) is connected to a rotating rod (25); the rotating rod (25) is detachably connected to a grinding roller (26); and a discharge port (27) is provided below the grinding jar (21).

3. A lithium slag treatment process according to claim 2, characterized in that: A plurality of material guide grooves (261) are provided above the grinding roller (26), and the top of the grinding roller (26) is arranged in a concave manner toward the material guide grooves (261).

4. A lithium slag treatment process according to claim 3, characterized in that: An annular groove (262) is provided at the lower outer side of the grinding roller (26); a plurality of positioning rods (211) are detachably connected to the grinding jar (21); the plurality of positioning rods (211) are slidably connected in the annular groove (262); and the plurality of annular grooves (262) are arranged to be tilted downward at the lower rear end.

5. A lithium slag treatment process according to claim 4, characterized in that: The grinding roller (26) is provided with a plurality of sliding grooves (263) on the outside, and a plurality of sliding plates (264) are slidably connected in the plurality of sliding grooves (263). The rear end of the sliding plate (264) is detachably connected to a plurality of cylinders (265). The plurality of cylinders (265) are detachably connected to the rotating rod (25). An air hole (251) is provided in the middle of the rotating rod (25). The plurality of cylinders (265) are in communication with the air hole (251). The rotating rod (25) A convex ring (252) is provided on the upper outer side, the outer side of the convex ring (252) is slidably connected to a limiting ring (253), a connecting hole in the convex ring (252) is connected to the air hole (251), an air guide tube (254) is provided on one side of the limiting ring (253), one end of the air guide tube (254) is arranged on the inner side of the limiting ring (253), the air guide tube (254) is connected to an air pump (255), and the air pump (255) is arranged on the outer side of the grinding jar (21).

6. A lithium slag treatment process according to claim 5, characterized in that: The filter assembly (3) comprises two support bars (31), the two support bars (31) being detachably connected to the support frame (1), a first slide groove (311) being provided on one side of the two support bars (31), a first screw rod (312) and a first slide rod (313) being provided in the two first slide grooves (311) respectively, and a first drive motor (314) being provided at one end of the first slide groove (311), the first drive motor (314) driving shaft being connected to the first screw rod (312), the first screw rod (312) and the first slide rod (313) being rotatably connected to the two first slide plates (32), a vibration assembly (33) being provided on one side of the two first slide plates (32), and the two vibration assemblies (33) being detachably connected to the filter frame (34).

7. A lithium slag treatment process according to claim 6, characterized in that: The vibration assembly (33) comprises two second slide plates (331), one side of the two first slide plates (32) is provided with a second slide groove (321), the two second slide plates (331) are slidably connected to the two second slide grooves (321), a third slide plate (332) is provided in the second slide groove (321), a third slide groove (333) is provided in the middle of the two second slide plates (332), the third slide plate (332) is slidably connected to the third slide groove (333), and a telescopic rod (334) is provided on one side of the third slide plate (332), one end of the telescopic rod (334) is detachably connected to one end of the third slide groove (333), and a second drive motor (335) is provided on the second slide groove (333), a drive shaft of the second drive motor (335) is connected to a triangular plate (336), the triangular plate (336) is pressed and connected to the inner wall of one end of the third slide groove (333), and the two second drive motors (335) are synchronous motors.

8. A lithium slag treatment process according to claim 7, characterized in that: Two convex strips (341) are provided on one side of the filter frame (34), and a fourth slide groove (342) is provided on one side of the two convex strips (341). A filter plate (343) is provided below the filter frame (34), and the filter plate (343) is slidably connected to the two fourth slide grooves (342). A second protrusion (344) is provided on one side of the filter plate (343). A second electric telescopic rod (345) is provided in each of the two fourth slide grooves (342), and one end of the second electric telescopic rod (345) is detachably connected to the second protrusion (344).

9. A lithium slag treatment process according to claim 8, characterized in that: The feeding assembly (4) comprises a vertical pipe (41), a fourth driving motor (42) is provided below the vertical pipe (41), a driving shaft of the fourth driving motor (42) is connected to a spiral shaft (43), a blade (44) is provided outside the spiral shaft (43), the blade (44) is slidably connected to the inner wall of the vertical pipe (41), a feeding bin (45) is provided below the outside of the vertical pipe (41), a discharge port (46) is provided above the outside of the vertical pipe (41), the discharge port (46) is detachably connected to a material guide pipe (47), and the material guide pipe (47) is located above the material guide trough (261).

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