Efficient separation system for spodumene and lepidolite mixed ore

Abstract

The invention discloses an efficient separation system for spodumene and lepidolite mixed ore, and relates to the technical field of mineral processing, and the efficient separation system is technically characterized by comprising a separation box, the top and the bottom of the separation box are hollowed-out, a smashing mechanism is arranged at the top of the separation box, and the smashing mechanism comprises a smashing box fixedly installed at the top of the separation box; the upper middle portion of an inner cavity of the crushing box is rotationally connected with a main coarse crushing roller and an auxiliary coarse crushing roller which penetrate through the crushing box, and the main coarse crushing roller and the auxiliary coarse crushing roller are located on the same horizontal plane. And by combining the spiral conveying blade and the inclined material return pipe, unqualified raw materials in the crushing process are automatically crushed again, the pH value of flotation liquid is accurately controlled through the pH detector, the alkaline adding piece and the acid adding piece, the ore separation efficiency and the concentrate grade are jointly improved, and the production cost and environmental pollution are reduced.

Description

Technical Field

[0001] The invention relates to the technical field of mineral processing, in particular to a high-efficiency separation system for mixed ore of spodumene and lepidolite. Background Art

[0002] With the rapid advancement of the new energy industry, demand for lithium, an indispensable strategic resource, continues to grow at an alarming rate. Spodumene and lepidolite, as the primary mineral sources of lithium, play a crucial role in supporting this growing demand. However, the mineral composition of spodumene and lepidolite, a common mineral mixture in nature, is extremely complex, and the two minerals are often closely intertwined. To extract lithium from these mixed ores, the ore must first be finely pulverized to expose more mineral surfaces for subsequent sorting. However, the complex interpenetration of spodumene and lepidolite in mixed ores undoubtedly increases the difficulty of the pulverization process.

[0003] However, conventional crushing equipment often struggles with such complex ore mixtures. Due to limitations in their pulverization mechanisms, these devices are prone to uneven pulverization, resulting in a range of ore particle sizes, from under-crushed large particles to over-crushed fine powder. This not only increases the difficulty of subsequent separation and reduces efficiency, but can also lead to the loss of useful minerals and increase production costs. Therefore, we propose a novel, highly efficient separation system for mixed spodumene and lepidolite ores. Summary of the Invention

[0004] In response to the shortcomings of the existing technology, the present invention provides an efficient separation system for spodumene and lepidolite mixed ore, which solves the problem that traditional crushing devices, when processing raw material mixed ore, easily lead to uneven crushing, different ore particle sizes, and increased sorting difficulty.

[0005] To achieve the above objectives, the present invention provides the following technical solution: an efficient separation system for spodumene and lepidolite mixed ore, comprising a sorting box, the top and bottom of which are hollow, and a crushing mechanism is provided on the top of the sorting box.

[0006] The pulverizing mechanism includes a pulverizing box fixedly mounted on the top of the sorting box, a main coarse pulverizing rod and a secondary coarse pulverizing rod penetrating the pulverizing box are rotatably connected to the middle and upper part of the inner cavity of the pulverizing box, the main coarse pulverizing rod and the secondary coarse pulverizing rod are located on the same horizontal plane, one end of the main coarse pulverizing rod is fixedly mounted with a main coarse movable wheel, the end of the main coarse pulverizing rod close to the main coarse movable wheel is fixedly mounted with a main coarse gear, one end of the secondary coarse pulverizing rod is fixedly mounted with a secondary coarse movable wheel, the main coarse movable wheel and the secondary coarse movable wheel are connected by a coarse belt transmission, and an oblique coarse filter fixedly mounted on the inner wall of the pulverizing box is provided directly below the main coarse pulverizing rod and the secondary coarse pulverizing rod.

[0007] The middle and lower part of the inner cavity of the crushing box is rotatably connected with a main fine crushing rod and a secondary fine crushing rod that pass through the crushing box. The main fine crushing rod and the secondary fine crushing rod are located on the same horizontal plane and directly below the main coarse crushing rod and the secondary coarse crushing rod. One end of the main fine crushing rod is fixedly mounted with a main fine moving wheel, and the end of the main fine crushing rod close to the main fine moving wheel is fixedly mounted with a main fine gear, and one end of the secondary coarse crushing rod is fixedly mounted with a secondary fine moving wheel. The main fine moving wheel and the secondary fine moving wheel are connected by a fine belt transmission. An oblique fine filter fixedly mounted on the inner wall of the crushing box is provided directly below the main fine crushing rod and the secondary fine crushing rod.

[0008] A pulverizing motor is fixedly mounted on the outside of the pulverizing box, and a mother gear is fixedly mounted on the output end of the pulverizing motor. The mother gear is meshed with a main coarse gear and a main fine gear.

[0009] Preferably, the diameters of the master coarse movement wheel and the master fine movement wheel are respectively larger than the diameters of the slave coarse movement wheel and the slave fine movement wheel.

[0010] Preferably, the main coarse pulverizing roller and the secondary coarse pulverizing roller have the same structure, shape and size, and are composed of a coarse pulverizing roller and a plurality of pulverizing rods.

[0011] Preferably, a return material structure is provided on the crushing box, and the return material structure includes a coarse raw material discharge trough fixedly mounted on the crushing box and located at the oblique lower end of the oblique coarse filter screen, the discharge port of the coarse raw material discharge trough is fixedly mounted with a return material box, the inner cavity of the return material box is fixedly mounted with a sleeve, the top end of the sleeve is fixedly mounted with a return material motor, the output end of the return material motor is fixedly mounted with a spiral conveying blade, an oblique return material pipe connected to the inner cavity of the sleeve is fixedly mounted on the sleeve, and the discharge end of the oblique return material pipe is located above the crushing box; the return material structure also includes a fine raw material discharge trough fixedly mounted on the crushing box and located at the oblique lower end of the oblique fine filter screen.

[0012] Preferably, the coarse raw material discharge trough and the fine raw material discharge trough are both connected to the inner cavity of the return box.

[0013] Preferably, a pH detector is fixedly mounted on the sorting box, an alkaline additive fixedly mounted on the sorting box is provided on one side of the pH detector, and an acidic additive fixedly mounted on the sorting box is provided on the other side of the pH detector.

[0014] Preferably, the alkaline additive comprises an alkaline agent box fixedly mounted on the sorting box, an alkali discharge pipe connected to the inner cavity of the alkaline agent box is fixedly mounted on the alkaline agent box, and an alkali discharge valve is fixedly mounted on the alkali discharge pipe.

[0015] Preferably, the acid additive comprises an acid agent box fixedly mounted on the sorting box, an acid discharge pipe connected to the inner cavity of the acid agent box is fixedly mounted on the acid agent box, and an acid discharge valve is fixedly mounted on the acid discharge pipe.

[0016] Preferably, the inner cavity of the sorting box is rotatably connected to a scraper plate, and one end of the scraper plate is fixedly mounted with a scraper motor that is fixedly connected to the sorting box.

[0017] Compared with the prior art, the present invention provides a highly efficient separation system for spodumene and lepidolite mixed ore, which has the following beneficial effects:

[0018] 1. This invention achieves both initial pulverization and secondary fine crushing of ore by employing primary, secondary, and fine crushing rollers. The primary and secondary crushing rollers initially crush the ore to a smaller particle size; the primary and secondary crushing rollers then perform secondary fine crushing on the ore, ensuring a more ideal particle size distribution. This hierarchical crushing structure effectively avoids the uneven pulverization often seen in traditional devices, improving the uniformity of ore particles and facilitating subsequent sorting operations.

[0019] 2. The present invention utilizes spiral conveying blades and an inclined return pipe to automatically recycle unqualified crushed raw materials. During the crushing process, ore particles that fail the grading screen are conveyed to the return box, then transported by the spiral conveying blades to the inclined return pipe. From there, they are transported back to the crushing box for further crushing. This design eliminates the need for manual intervention, automates and intelligentizes the crushing process, and significantly improves production efficiency and stability. Furthermore, the continuous crushing cycle ensures that all ore raw materials are fully crushed, improving the uniformity of ore particles and the sorting efficiency.

[0020] 3. The present invention achieves precise control of the pH of the flotation fluid by providing a pH meter, alkaline additives, and acidic additives. The pH meter monitors the pH of the flotation fluid in real time and automatically adjusts the amount of reagents added to the alkaline and acidic reagent cartridges according to preset values, thereby precisely controlling the pH of the flotation fluid. This adjustment method reduces the amount of flotation reagents used, lowering production costs and minimizing environmental pollution. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 It is a complete structural diagram of the present invention;

[0022] Figure 2 For the present invention Figure 1 Another perspective structural diagram;

[0023] Figure 3 For the present invention Figure 1 Schematic diagram of the cross-section structure.

[0024] In the picture:

[0025] 1. Sorting box;

[0026] 2. Crushing mechanism; 201. Crushing box; 202. Main coarse crushing roller; 203. Secondary coarse crushing roller; 204. Main coarse movable pulley; 205. Main coarse gear; 206. Secondary coarse movable pulley; 207. Coarse belt; 208. Oblique coarse filter; 209. Main fine crushing roller; 210. Secondary fine crushing roller; 211. Main fine movable pulley; 212. Main fine gear; 213. Secondary fine movable pulley; 214. Fine belt; 215. Oblique fine filter; 216. Crushing motor; 217. Mother gear;

[0027] 218. Return material structure; 2181. Coarse material discharge chute; 2182. Return material box; 2183. Sleeve; 2184. Return material motor; 2185. Spiral conveying blade; 2186. Inclined return material pipe; 2187. Fine material discharge chute;

[0028] 3. pH detector;

[0029] 4. Alkali additive; 401. Alkali agent box; 402. Alkali discharge pipe; 403. Alkali discharge valve;

[0030] 5. Acid additives; 501. Acid reagent box; 502. Acid discharge pipe; 503. Acid discharge valve;

[0031] 6. Scraping board;

[0032] 7. Foam scraping motor. DETAILED DESCRIPTION

[0033] In the present invention, unless otherwise specified, directions such as "up" and "down" are generally used with respect to the directions shown in the drawings, or with respect to the vertical, perpendicular or gravity directions; similarly, for ease of understanding and description, "left" and "right" are generally used with respect to the left and right shown in the drawings; "inside" and "outside" refer to the inside and outside relative to the outline of each component itself, but the above-mentioned directions are not used to limit the present invention.

[0034] The present invention provides a technical solution:

[0035] See also Figures 1 to 3 The invention discloses an efficient separation system for mixed spodumene and lepidolite ore, comprising a sorting box 1, the top and bottom of which are hollowed out, and a crushing mechanism 2 is provided on the top of the sorting box 1, wherein the crushing mechanism 2 can perform preliminary crushing and re-fine crushing on the ore raw materials, so that the ore raw materials can be crushed more evenly and thoroughly.

[0036] The pulverizing mechanism 2 includes a pulverizing box 201 fixedly mounted on the top of the sorting box 1, and a main coarse pulverizing rod 202 and a secondary coarse pulverizing rod 203 that pass through the pulverizing box 201 are rotatably connected to the middle and upper part of the inner cavity of the pulverizing box 201, and the main coarse pulverizing rod 202 and the secondary coarse pulverizing rod 203 are located on the same horizontal plane, and a main coarse moving wheel 204 is fixedly mounted on one end of the main coarse pulverizing rod 202, and a main coarse gear 205 is fixedly mounted on the end of the main coarse pulverizing rod 202 close to the main coarse moving wheel 204, and a secondary coarse moving wheel 206 is fixedly mounted on one end of the secondary coarse pulverizing rod 203, and the main coarse moving wheel 204 and the secondary coarse moving wheel 206 are connected by a coarse belt 207. An oblique coarse filter 208 fixedly mounted on the inner wall of the pulverizing box 201 is provided directly below the main coarse pulverizing rod 202 and the secondary coarse pulverizing rod 203.

[0037] The main coarse crushing rollers 202 and the secondary coarse crushing rollers 203 rotate synchronously to perform preliminary crushing of the ore. During operation, the ore is fed into the crushing box 201 and crushed by the two rollers through squeezing, shearing, and crushing. Qualified particles pass through the inclined coarse filter 208 and fall below, while unqualified particles are returned through the return mechanism 218 for further crushing.

[0038] The middle and lower part of the inner cavity of the crushing box 201 is rotatably connected with the main fine crushing rod 209 and the secondary fine crushing rod 210 that pass through the crushing box 201. The main fine crushing rod 209 and the secondary fine crushing rod 210 are located on the same horizontal plane and directly below the main coarse crushing rod 202 and the secondary coarse crushing rod 203. One end of the main fine crushing rod 209 is fixedly installed with a main fine moving wheel 211, and the end of the main fine crushing rod 209 close to the main fine moving wheel 211 is fixedly installed with a main fine gear 212, and one end of the secondary coarse crushing rod 203 is fixedly installed with a secondary fine moving wheel 213. The main fine moving wheel 211 and the secondary fine moving wheel 213 are connected by a fine belt 214. Directly below the main fine crushing rod 209 and the secondary fine crushing rod 210 is an inclined fine filter 215 fixedly installed on the inner wall of the crushing box 201.

[0039] The primary and secondary crushing rollers 209 and 210 in the lower center of the crushing box 201 rotate synchronously to further crush the initially crushed ore. After passing through the inclined coarse filter 208, the ore enters the space between the two fine crushing rollers for further crushing. Qualified particles pass through the inclined fine filter 215 and fall into the sorting box, while unqualified particles are returned to the feed for further crushing. This design ensures a more uniform ore particle size, creating ideal conditions for flotation separation, improving separation efficiency and concentrate quality, while minimizing mineral loss and lowering production costs.

[0040] A pulverizing motor 216 is fixedly mounted on the outside of the pulverizing box 201 . A mother gear 217 is fixedly mounted on the output end of the pulverizing motor 216 . The mother gear 217 is meshed with the main coarse gear 205 and the main fine gear 211 .

[0041] The crushing motor 216 drives the main coarse gear 205 and the main fine gear 211 through the mother gear 217, so that the main coarse crushing roller 202 and the main fine crushing roller 209 rotate synchronously, thereby achieving the initial and secondary crushing of the ore.

[0042] In some embodiments, the diameters of the primary coarse movement wheel 204 and the primary fine movement wheel 211 are respectively larger than the diameters of the secondary coarse movement wheel 206 and the secondary fine movement wheel 213 .

[0043] In this embodiment, the diameters of the main coarse motion wheel 204 and the main fine motion wheel 211 are respectively set to be larger than the diameters of the slave coarse motion wheel 206 and the slave fine motion wheel 213, so that when the main coarse crushing roller 202 and the main fine crushing roller 209 rotate and the slave coarse crushing roller 203 and the slave fine crushing roller 210, a speed difference is formed between them, thereby facilitating the crushing of the ore raw materials.

[0044] In some embodiments, the main coarse crushing roller 202 and the secondary coarse crushing roller 203 have the same structure, shape and size. The main coarse crushing roller 202 and the secondary coarse crushing roller 203 are composed of a coarse crushing roller and a plurality of crushing rods.

[0045] In this embodiment, the main coarse crushing roller 202 and the secondary coarse crushing roller 203 can perform preliminary crushing processing on the ore raw material.

[0046] See also Figures 1 to 3 A return material structure 218 is provided on the crushing box 201, and the return material structure 218 includes a coarse raw material discharge trough 2181 fixedly mounted on the crushing box 201 and located at the oblique lower end of the oblique coarse filter 208, a return material box 2182 is fixedly mounted at the discharge port of the coarse raw material discharge trough 2181, a sleeve 2183 is fixedly mounted on the inner cavity of the return material box 2182, a return material motor 2184 is fixedly mounted on the top of the sleeve 2183, a spiral conveying blade 2185 is fixedly mounted on the output end of the return material motor 2184, an oblique return material pipe 2186 connected to the inner cavity of the sleeve 2183 is fixedly mounted on the sleeve 2183, and the discharge end of the oblique return material pipe 2186 is located above the crushing box 201; the return material structure 218 also includes a fine raw material discharge trough 2187 fixedly mounted on the crushing box 201 and located at the oblique lower end of the oblique fine filter 215.

[0047] The return mechanism 218 consists of a coarse material chute 2181, a return box 2182, a sleeve 2183, a return motor 2184, spiral conveyor blades 2185, an inclined return pipe 2186, and a fine material chute 2187. During operation, ore particles that fail to pass through the coarse and fine filters enter the return box 2182 through the chute, are transported by spiral conveyor blades 2185 to the inclined return pipe 2186, and then return to the crushing box 201 for further crushing. This structure ensures sufficient ore crushing, improves ore particle size uniformity, reduces mineral loss, and improves sorting efficiency and concentrate grade.

[0048] In some embodiments, the coarse raw material discharge trough 2181 and the fine raw material discharge trough 2187 are both connected to the inner cavity of the return box 2182.

[0049] In this embodiment, the coarse material discharge trough 2181 and the fine material discharge trough 2187 are both arranged to be connected to the inner cavity of the return box 2182, so that unqualified ore materials after primary crushing and fine crushing can directly enter the return box 2182.

[0050] See also Figure 1 A pH detector 3 is fixedly installed on the sorting box 1, and an alkaline additive 4 fixedly installed on the sorting box 1 is provided on one side of the pH detector 3, and an acidic additive 5 fixedly installed on the sorting box 1 is provided on the other side of the pH detector 3.

[0051] The pH meter 3 monitors the pH of the flotation liquid in the separation tank in real time. Based on the test results, the controller adjusts the dosage of the alkaline additive 4 and the acidic additive 5 to precisely control the pH of the flotation liquid. This design improves the separation efficiency of spodumene and lepidolite, reduces reagent usage and environmental pollution, and ensures the stability of the separation process and the concentrate grade.

[0052] See also Figure 1 and Figure 3 The alkaline additive 4 includes an alkaline agent box 401 fixedly mounted on the sorting box 1 , a alkali discharge pipe 402 connected to the inner cavity of the alkaline agent box 401 is fixedly mounted on the alkaline agent box 401 , and an alkali discharge valve 403 is fixedly mounted on the alkali discharge pipe 402 .

[0053] The alkaline additive unit 4 consists of an alkaline reagent box 401, an alkaline drain pipe 402, and an alkaline discharge valve 403. During operation, the controller adjusts the opening of the alkaline discharge valve 403 based on the test results of the pH meter 3. This allows the reagent in the alkaline reagent box 401 to be accurately added to the flotation liquid through the alkaline drain pipe 402, adjusting the pH to the optimal range. This design ensures efficient separation of spodumene and lepidolite while minimizing reagent waste and environmental pollution.

[0054] See also Figure 1 and Figure 3 The acid additive 5 includes an acid reagent box 501 fixedly mounted on the sorting box 1 , an acid discharge pipe 502 connected to the inner cavity of the acid reagent box 501 is fixedly mounted on the acid reagent box 501 , and an acid discharge valve 503 is fixedly mounted on the acid discharge pipe 502 .

[0055] The acid additive unit 5 consists of an acid reagent box 501, an acid discharge pipe 502, and an acid discharge valve 503. During operation, it interacts with the pH meter 3. Based on the test results, the controller adjusts the opening of the acid discharge valve 503, precisely controlling the addition of acid reagent from the acid reagent box 501 through the acid discharge pipe 502 to the flotation liquid, adjusting the pH to the desired range. This design ensures a highly efficient and stable flotation process, improving the separation efficiency of spodumene and lepidolite, while also reducing reagent consumption and minimizing environmental pollution.

[0056] See also Figure 1 The inner cavity of the sorting box 1 is rotatably connected to a scraping plate 6, and one end of the scraping plate 6 is fixedly mounted with a scraping motor 7 that is fixedly connected to the sorting box 1.

[0057] The scraper plate 6, driven by a scraper motor 7, rotates within the separation box. During operation, the scraper plate 6 scrapes or overflows the froth layer rich in spodumene and lepidolite produced by flotation, separating and collecting the spodumene and lepidolite. This design improves flotation efficiency, ensures a stable concentrate grade, reduces manual intervention, and enhances production automation.

[0058] To use this device, the pulverizing motor 216 is first activated. The output of the pulverizing motor 216 drives the mother gear 217 to rotate. Mother gear 217 meshes tightly with the main coarse gear 205 and the main fine gear 212, driving them to rotate synchronously. The rotation of the main coarse gear 205 further drives the connected main coarse pulverizing rollers 202. Simultaneously, the main coarse movable wheel 204 at one end of the main coarse pulverizing rollers 202 is connected to the slave coarse movable wheel 206 via a coarse belt 207, enabling synchronous rotation of the slave coarse pulverizing rollers 203. This coarse crushing step is intended to initially break down large pieces of raw ore into smaller particles.

[0059] Simultaneously, the rotation of the mother gear 217 also drives the main fine gear 212, which in turn rotates the main fine grinding rollers 209. The main fine driving wheel 211 at one end of the main fine grinding rollers 209 drives the secondary fine driving wheel 213 via a fine belt 214, which in turn drives the secondary fine grinding rollers 210. This fine crushing step, following the coarse crushing step, further refines the initially crushed ore to ensure a more ideal particle size distribution, facilitating subsequent sorting operations.

[0060] During the pulverization process, raw ore is first placed in the pulverization chamber 201. It passes through the gap between the primary coarse pulverizing rollers 202 and the secondary coarse pulverizing rollers 203, where it is initially crushed by compression and shear forces. After this initial crushing, qualified ore particles (i.e., those meeting the required particle size) pass through the inclined coarse filter 208 and fall into the space between the primary fine pulverizing rollers 209 and the secondary fine pulverizing rollers 210 for further fine crushing. Particles that are still too large are blocked by the inclined coarse filter 208 and enter the return chamber 2182 through the coarse material discharge chute 2181.

[0061] In the return bin 2182, unqualified ore particles come into contact with spiral conveyor blades 2185, which are driven by a return motor 2184 and convey the ore particles along an inclined return pipe 2186 back to the crushing bin 201 for further crushing. This return mechanism ensures that all ore raw materials are fully crushed to the required particle size.

[0062] After being finely crushed by the primary and secondary pulverizing rollers 209 and 210, qualified ore particles pass through the inclined fine filter 215 and fall directly into the sorting box 1 below, ready for subsequent sorting operations. Particles that fail to pass through the inclined fine filter 215 pass through the fine material discharge chute 2187 and into the return box 2182. They are then similarly recycled into the crushing box 201 via the spiral conveyor blades 2185 and the inclined return pipe 2186 for further crushing.

[0063] During the sorting process, to ensure that the ore slurry is in an optimal pH environment, a pH detector 3 is installed on the sorting box 1. This detector monitors the pH of the ore slurry in real time and transmits the data to the controller (the controller is installed on the sorting box 1). The controller determines whether the pH of the ore slurry needs to be adjusted based on the preset pH range. If necessary, the controller will adjust the amount of reagent added to the alkaline reagent box 401 and the acid reagent box 501 by controlling the opening degree of the alkaline discharge valve 403 and the acid discharge valve 503, respectively, thereby accurately controlling the pH of the ore slurry and creating optimal conditions for the separation of spodumene and lepidolite.

[0064] Subsequently, an appropriate amount of flotation reagent is added, and an air pump is appropriately used to replenish gas in the solution. Utilizing the surface property differences between spodumene and lepidolite and other impurities, the flotation separation of lepidolite is achieved through bubble adhesion. During the flotation process, a foam scraping motor 7 is started, and the foam layer rich in spodumene and lepidolite is scraped out or overflowed by the foam scraping plate 6 to collect the flotation products of spodumene and lepidolite.

[0065] This process allows for efficient and precise separation of mixed spodumene and lepidolite ore. This device not only overcomes the problems of uneven pulverization and low separation efficiency associated with traditional pulverization equipment, but also significantly improves spodumene and lepidolite separation efficiency and concentrate grade through innovative designs such as a material return mechanism, automatic pH adjustment, and foam scraping, reducing production costs and providing strong technical support for the development of the new energy industry.

[0066] The above are only specific embodiments of the present invention, but the technical features of the present invention are not limited thereto. Any simple changes, equivalent substitutions, or modifications based on the present invention to solve substantially the same technical problems and achieve substantially the same technical effects are all included in the scope of protection of the present invention.

Claims

1. An efficient separation system for mixed spodumene and lepidolite ores, characterized in that: It includes a sorting box, the top and bottom of which are hollow, and a crushing mechanism is provided on the top of the sorting box; The pulverizing mechanism includes a pulverizing box fixedly mounted on the top of the sorting box, a main coarse pulverizing rod and a secondary coarse pulverizing rod which penetrate the pulverizing box are rotatably connected to the middle and upper part of the inner cavity of the pulverizing box, the main coarse pulverizing rod and the secondary coarse pulverizing rod are located on the same horizontal plane, one end of the main coarse pulverizing rod is fixedly mounted with a main coarse movable wheel, the end of the main coarse pulverizing rod close to the main coarse movable wheel is fixedly mounted with a main coarse gear, one end of the secondary coarse pulverizing rod is fixedly mounted with a secondary coarse movable wheel, the main coarse movable wheel and the secondary coarse movable wheel are connected by a coarse belt transmission, and an oblique coarse filter screen fixedly mounted on the inner wall of the pulverizing box is provided directly below the main coarse pulverizing rod and the secondary coarse pulverizing rod; A main fine grinding roller and a secondary fine grinding roller that penetrate the grinding box are rotatably connected to the middle and lower part of the inner cavity of the grinding box. The main fine grinding roller and the secondary fine grinding roller are located on the same horizontal plane and are directly below the main coarse grinding roller and the secondary coarse grinding roller. One end of the main fine grinding roller is fixedly mounted with a main fine moving wheel, and the end of the main fine grinding roller close to the main fine moving wheel is fixedly mounted with a main fine gear. One end of the secondary coarse grinding roller is fixedly mounted with a secondary fine moving wheel. The main fine moving wheel and the secondary fine moving wheel are connected by a fine belt transmission. An oblique fine filter screen fixedly mounted on the inner wall of the grinding box is provided directly below the main fine grinding roller and the secondary fine grinding roller. A crushing motor is fixedly installed on the outside of the crushing box, and a mother gear is fixedly installed on the output end of the crushing motor. The mother gear is meshed with the main coarse gear and the main fine gear.

2. The efficient separation system for spodumene and lepidolite mixed ore according to claim 1, characterized in that: The diameters of the master coarse movement wheel and the master fine movement wheel are respectively larger than the diameters of the slave coarse movement wheel and the slave fine movement wheel.

3. The efficient separation system for spodumene and lepidolite mixed ore according to claim 1, characterized in that: The main coarse crushing roller and the secondary coarse crushing roller have the same structure, shape and size. The main coarse crushing roller and the secondary coarse crushing roller are composed of a coarse crushing roller and a plurality of crushing rods.

4. The efficient separation system for spodumene and lepidolite mixed ore according to claim 1, characterized in that: A return material structure is provided on the crushing box, which includes a coarse raw material discharge trough fixedly mounted on the crushing box and located at the oblique lower end of the oblique coarse filter screen, a return material box is fixedly mounted on the discharge port of the coarse raw material discharge trough, a sleeve is fixedly mounted on the inner cavity of the return material box, a return material motor is fixedly mounted on the top of the sleeve, a spiral conveying blade is fixedly mounted on the output end of the return material motor, an oblique return material pipe connected to the inner cavity of the sleeve is fixedly mounted on the sleeve, and the discharge end of the oblique return material pipe is located above the crushing box; the return material structure also includes a fine raw material discharge trough fixedly mounted on the crushing box and located at the oblique lower end of the oblique fine filter screen.

5. The efficient separation system for spodumene and lepidolite mixed ore according to claim 4, characterized in that: The coarse raw material discharge trough and the fine raw material discharge trough are both communicated with the inner cavity of the return material box.

6. The efficient separation system for spodumene and lepidolite mixed ore according to claim 1, characterized in that: A pH detector is fixedly installed on the sorting box. An alkaline additive fixedly installed on the sorting box is provided on one side of the pH detector, and an acidic additive fixedly installed on the sorting box is provided on the other side of the pH detector.

7. The efficient separation system for spodumene and lepidolite mixed ore according to claim 6, characterized in that: The alkaline additive comprises an alkaline agent box fixedly mounted on the sorting box, an alkali discharge pipe connected with the inner cavity of the alkaline agent box fixedly mounted on the alkaline agent box, and an alkali discharge valve fixedly mounted on the alkali discharge pipe.

8. The efficient separation system for spodumene and lepidolite mixed ore according to claim 6, characterized in that: The acid additive comprises an acid reagent box fixedly mounted on the sorting box, an acid discharge pipe connected to the inner cavity of the acid reagent box fixedly mounted on the acid reagent box, and an acid discharge valve fixedly mounted on the acid discharge pipe.

9. The efficient separation system for spodumene and lepidolite mixed ore according to claim 1, characterized in that: The inner cavity of the sorting box is rotatably connected with a foam scraping plate, and one end of the foam scraping plate is fixedly installed with a foam scraping motor that is fixedly connected with the sorting box.

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