A device and process for extracting lithium from waste slag after lithium extraction from lepidolite ore

Abstract

The present invention relates to the technical field of lithium extraction from lepidolite ore, and specifically to a device and process for re-extracting lithium from waste slag after lithium extraction from lepidolite ore, comprising a feed port, a motor, a fixing frame, a support frame, a discharge port, a box body and a support; the feed port is installed above the box body, the motor is installed above the box body, the fixing frame is installed around the outer side of the motor, the four ends of the fixing frame are installed on the support frame, the support frame is installed above the box body, the discharge port is installed above the box body and is symmetrical with the feed port, the bottom of the box body is provided with supports around the four sides, and also includes a grinding and selection mechanism, which is fixedly installed on the box body. The present invention solves the problem that the existing waste slag re-lithium extraction device has a cumbersome operating process when extracting lithium, resulting in poor lithium extraction effect and efficiency, and realizes rapid grinding and magnetic separation of the waste slag re-lithium extraction device after lithium extraction from lepidolite ore, saving time and labor, and improving the lithium extraction effect and efficiency.

Description

Technical Field

[0001] The present invention relates to the technical field of lithium extraction from lepidolite ore, and in particular to a device and process for re-extracting lithium from waste slag after lithium extraction from lepidolite ore. Background Art

[0002] Lepidolite is a key lithium mineral and the most common. This mineral belongs to the mica family and is primarily composed of potassium, lithium, aluminum, and silicon. Lepidolite is typically found only in granite pegmatites. Its color can range from purple and pink to colorless, and it possesses a unique pearly luster. It typically occurs as short columns, small flakes, or large plate-like crystals. The lithium extraction process involves crushing the lepidolite ore, then subjecting it to acid or alkaline leaching, and finally filtering and separating it. The lithium in the solution is then purified, completing the lithium extraction process.

[0003] After lithium extraction from existing lepidolite ore, waste slag will be left behind, and the waste slag needs to be subjected to lithium extraction again to extract the lithium inside the waste slag to avoid waste of resources. When the waste slag is subjected to lithium extraction, it is also required to undergo magnetic separation to magnetically separate the metal fragments inside the waste slag. However, the existing device for extracting lithium from the waste slag again after lithium extraction from lepidolite ore first needs to grind the waste slag. After grinding, the waste slag needs to be taken out and then placed in another machine for magnetic separation. The operation is relatively cumbersome, time-consuming and labor-intensive, resulting in poor lithium extraction effect from the waste slag and low lithium extraction efficiency.

[0004] In view of this, in order to address the above-mentioned deficiencies, the present invention has developed a device and process for extracting lithium again from waste slag after lithium extraction from lepidolite ore. Summary of the Invention

[0005] The technical purpose to be achieved by the present invention is: when lithium is extracted from lepidolite ore and the waste slag is used to extract lithium again, the waste slag is fully ground and then the metal fragments inside the waste slag are screened, thereby improving the purity of lithium in the waste slag, saving the operating process, saving time and labor, and improving the effect of lithium extraction from the waste slag and the efficiency of lithium extraction.

[0006] The present invention provides the following technical solutions: a device for extracting lithium again from waste slag after lithium extraction from lepidolite ore, comprising a feed port, a motor, a fixed frame, a support frame, a discharge port, a box body and a support; the feed port is installed above the box body, the motor is installed above the box body, the fixed frame is installed around the outer side of the motor, the four ends of the fixed frame are installed on the support frame, the support frame is installed above the box body, the discharge port is installed above the box body and is symmetrical with the feed port, supports are installed around the bottom of the box body, and also includes a grinding mechanism, the grinding mechanism is fixedly installed on the box body, and the grinding mechanism is connected to the motor, the grinding mechanism drives the cone block to rotate through the rotation of the motor, the rotating cone block grinds the waste slag and falls into the bottom of the box body, and then the waste slag is transported to the electromagnetic disk through a spiral auger, the electromagnetic disk will rotate to generate centrifugal force and electromagnetic adsorption force, and centrifugally separate the non-metallic fragments inside the waste slag.

[0007] When lithium is extracted from lepidolite ore and then the waste slag is used to extract lithium again, the waste slag needs to be ground again to make the powder of the waste slag finer. In this way, the waste slag can be used for lithium extraction with better efficiency and better purity. This requires grinding inside the grinding mechanism to make the waste slag more fully ground. Since there are metal fragments inside the waste slag after grinding, the waste slag needs to be further screened through magnetic separation, so that the subsequent lithium extraction effect is better and the efficiency of lithium extraction is greatly improved.

[0008] The grinding and selection mechanism includes a cone block, a cylinder, a rotating disk, a drum, a spiral auger, an electromagnetic disk, a scraper box and a buffer module; the cone block is located inside the box, the cone block is gap-fitted with the inner wall of the box, a cylinder is installed on the top of the cone block, a rotating disk is fixedly installed on the top of the cylinder, a ring piece is provided on the cylinder, a cylinder is installed at the center position of the cone block, a spiral auger is installed inside the cylinder, an electromagnetic disk is installed on the top of the cylinder, a scraper box is installed above the electromagnetic disk, the top outer surface of the electromagnetic disk is movably fitted with the bottom of the scraper box, and the buffer module is installed at the bottom of the cone block.

[0009] In order to grind the waste slag quickly and turn it into finer particles to facilitate subsequent lithium extraction, it is necessary to rotate the cone block on the grinding mechanism to grind the waste slag into finer particles, thereby improving the efficiency of subsequent lithium extraction from the waste slag. After the grinding is completed, the ground slag powder needs to be transported by a spiral auger, and the ground slag powder needs to be magnetically separated by an electromagnetic disk, so that the metal slag is adsorbed by the magnetic force of the electromagnetic disk. As the electromagnetic disk rotates, the non-metallic slag on the electromagnetic disk will detach from the electromagnetic disk due to the action of centrifugal force and be discharged from the discharge port. The metal slag on the electromagnetic disk will enter the scraper box due to the rotation, thereby preventing subsequent grinding. The resulting slag cannot be magnetically separated, and during the rotation process, the buffer module can independently adjust the gap between the cone block and the box body, so that the waste slag can be ground more efficiently and made finer. The ring plate is set to discharge non-metallic waste slag and metal waste slag through the discharge port respectively to prevent the mixing of metal waste slag and non-metallic waste slag during the discharge process. It should be noted that there is a certain gap between the cylinder and the cone block, which is used to allow the cone block to undergo a slight radial displacement during the rotation, so that the gap between the cone block and the box body on any side is smaller, thereby grinding finer. At the same time, the connection between the rotating disk and the motor is a non-rigid connection, so that the rotating disk can move radially or axially.

[0010] A circular through hole is provided at the center of the cone block, a spiral ring is provided on the cone surface of the cone block, a circular ring is provided on the top of the cone block, a rectangular sheet is provided below the circular ring, a conical groove is provided inside the cone block, and a steel ball is placed inside the conical groove.

[0011] In order to grind the waste slag into finer pieces and transport the ground waste slag to the bottom of the cone block, a spiral ring is set on the conical surface of the cone block. When the cone block rotates and grinds, the waste slag can be ground into finer pieces, thereby improving the efficiency of subsequent waste slag lithium extraction. At the same time, the spiral ring can push the ground waste slag to move downward and accumulate at the bottom. The circular ring set on the top of the cone block is to prevent the waste slag from leaking into the box when it enters from the feed port. It should be noted that since the distance between the cone block and the inner wall of the box is small, the feed port is too small. There is only one material inlet, and a rectangular piece needs to be set under the circular ring. As the waste slag is poured in, the cone block can rotate to make the rectangular piece push the excess waste slag, so that it can quickly enter between the cone block and the box for grinding. The steel balls placed inside the cone block are to counterweight the cone block, so that when the cone block rotates, the internal steel balls will move, and the centrifugal force generated by the rotation of the cone block will throw the steel balls around the cone block, thereby increasing the centrifugal force and inertia force, so that the gap between the cone block and the box in the radial direction can be fine-tuned by itself, thereby making the grinding effect of the waste slag better.

[0012] A conical groove is formed on the top of the box body, and a bottom groove is formed on the bottom of the conical groove. The bottom groove is a conical structure.

[0013] It should be noted that the conical groove on the top of the box will cooperate with the conical block, so that the conical block can rotate in the conical groove on the box, thereby grinding the waste slag, making the grinding effect of the waste slag better, and grinding the waste slag into finer particles, which is convenient for subsequent lithium extraction from the waste slag. The conical structure of the bottom trough is to allow the waste slag to automatically enter the cylinder through gravity and transport it to the top.

[0014] A rectangular through hole is provided on the top side of the cylinder, and an arc-shaped hole is provided on the bottom of the cylinder. It should be noted that after the waste slag is ground, it needs to be transported, and the cylinder will be fixedly mounted on the bottom of the bottom trough of the box body, and an arc-shaped hole is provided at the bottom of the cylinder for the ground waste slag to enter. When the ground waste slag falls into the bottom trough and accumulates, as the motor rotates, the waste slag will pass through the arc-shaped hole and enter the spiral auger inside the cylinder, and the spiral auger will transport the waste slag, and finally discharge it through the rectangular through hole at the top of the cylinder, thereby realizing the transportation of the ground waste slag.

[0015] The interior of the electromagnetic disk is composed of a plurality of arc-shaped magnetic pieces. The electromagnetic disk is a conical disk structure. Partition plates are arranged around the electromagnetic disk of the conical disk structure.

[0016] In order to enable the electromagnetic disk to separate the metal fragments inside the waste slag, a larger electromagnetic force is required, and when the electromagnetic disk is in one circle, the non-metallic fragments are first separated by centrifugal force. The metal fragments remaining on the electromagnetic disk after separation will rotate with the electromagnetic disk. In order to ensure that the subsequent waste slag can be thoroughly separated, when the electromagnetic disk rotates to the bottom of the scraper box, the arc-shaped magnetic plate at the bottom of the scraper box will be powered off, so that the metal fragments on the electromagnetic disk can be scraped into the scraper box and the metal fragments can be collected. Partitions are provided around the electromagnetic disk with a conical disc structure. This is to ensure that the non-metallic fragments can be quickly collected after the separation is completed. At the same time, the non-metallic fragments are separated from the electromagnetic disk due to the action of centrifugal force, and the non-metallic fragments will be distributed around the electromagnetic disk and separated by the partitions. When the partition rotates to the discharge port, the non-metallic fragments around it are discharged through the discharge port due to the action of centrifugal force.

[0017] A circular hole is provided at the center of the electromagnetic disk. The angle between the extension line of the conical surface and the bottom surface of the electromagnetic disk is a certain angle. Annular protrusions of different diameters are provided on the conical surface of the electromagnetic disk.

[0018] In order to enable the ground waste slag to be quickly magnetically separated, the electromagnetic disk needs to generate a large centrifugal force during rotation, so that the waste slag falling on the electromagnetic disk can be separated from the non-metallic fragments by the large centrifugal force. The angle between the extension line of the conical surface and the bottom surface of the disk is at a certain angle. This is to speed up the separation of non-metallic fragments, so that the non-metallic fragments will not be stacked as much as possible after falling on the electromagnetic disk, thereby dispersing the waste slag for magnetic separation. Annular protrusions of different diameters are provided on the conical surface of the electromagnetic disk. This is to prevent some smaller powders from being thrown out by centrifugal force due to insufficient electromagnetic adsorption, thereby affecting the magnetic separation of the waste slag.

[0019] The scraper box is an arc-shaped structure, and the bottom of the arc-shaped scraper box is an inclined bottom surface. The inclined bottom surface is provided with a plurality of arc-shaped grooves of different diameters, and the arc-shaped grooves cooperate with the annular protrusions on the electromagnetic disk.

[0020] It should be noted that the bottom of the scraper box is an inclined bottom surface, and a plurality of arc grooves of different diameters are provided on the inclined bottom surface, which is to cooperate with the annular protrusion on the electromagnetic disk. In order to ensure that the waste slag can magnetically separate the internal metal fragments, it is necessary to ensure the mutual cooperation between the scraper box and the electromagnetic disk, and when the electromagnetic disk rotates one circle, the scraper box will scrape off the metal powder adsorbed on the electromagnetic disk and collect it inside the scraper box, thereby ensuring that the waste slag after subsequent grinding falls onto the electromagnetic disk, and the metal fragments can be magnetically separated more efficiently.

[0021] The buffer module includes an annular block and a compression spring. The bottom of the annular block is clamped with the compression spring, and the compression spring is clamped to the bottom of the box. The diameter of the annular block is slightly larger than the diameter of the cylinder.

[0022] It should be noted that when the cone block rotates, the steel ball inside the cone block will generate a strong centrifugal force due to the rotation of the cone block, and the steel ball will move to the edge of the cone block, increasing the centrifugal force and inertia force of the cone block during rotation, so that the cone block can grind the waste slag into finer particles. By compressing the spring, the gap between the cone block and the inner wall of the box can be adjusted according to the rotation speed during grinding. At the same time, it can move slightly in the axial direction and adjust automatically, thereby improving the grinding effect of the waste slag.

[0023] The process for extracting lithium again from waste slag after lithium extraction from lepidolite ore comprises the following steps:

[0024] S1: First, the waste slag after lithium extraction from lepidolite ore is slowly poured into the box through the feed port, and then the grinding and separation mechanism inside the box is started;

[0025] S2: The grinding mechanism starts, the motor will rotate, and drive the rotating disk and the spiral auger to rotate. The rotating disk transmits power to the cone block, and the cone block rotates to grind the waste slag. The ground waste slag will fall to the bottom of the box by gravity;

[0026] S3: After the waste slag falls into the bottom of the box, it will slowly accumulate. Due to the rotation of the spiral auger, the waste slag accumulated at the bottom of the box will be transported to the top of the spiral auger and discharged through the rectangular through-hole at the top of the cylinder;

[0027] S4: The discharged waste slag will fall onto the electromagnetic disk, which will be energized to generate electromagnetic force and absorb the metal debris inside the waste slag. Since the electromagnetic disk is always rotating, the non-metallic debris will be separated from the electromagnetic disk due to centrifugal force, and the non-metallic debris around the electromagnetic disk will be scraped to the discharge port through the partition for discharge;

[0028] S5: The metal debris will rotate with the electromagnetic disk. When the electromagnetic disk rotates to the bottom of the scraper box, the area of ​​the electromagnetic disk below the scraper box will be powered off and the magnetism will disappear. The metal debris on the electromagnetic disk will be collected inside the scraper box.

[0029] S6: The waste slag is magnetically separated and collected by an electromagnetic disk and discharged through a discharge port to complete the magnetic separation of the waste slag. The waste slag after magnetic separation needs to be acid leached or alkaline leached, and then separated and purified to obtain pure lithium.

[0030] The beneficial effects of the present invention are as follows:

[0031] 1. The present invention provides a grinding and separation mechanism inside the box. Through the cooperation of the motor and the grinding and separation mechanism, the waste slag is ground and then magnetically separated, so that the waste slag is ground into fine particles, and the metal fragments inside are screened out by magnetic adsorption and centrifugal force, so as to obtain a higher content of lithium-containing substances. The operation process is simple, time-saving and labor-saving, and the efficiency of lithium extraction from waste slag is greatly improved.

[0032] 2. The present invention provides a cone block on the grinding mechanism, places a steel ball inside the cone block, and causes the steel ball to move inside through the rotating cone block, thereby increasing the centrifugal force and inertial force of the cone block, enhancing the grinding effect of the waste slag, allowing the waste slag to be ground into finer pieces by the cone block, and greatly improving the efficiency of subsequent lithium extraction.

[0033] 3. The present invention provides an electromagnetic disk on the grinding and separation mechanism, and cooperates with the cone block and the spiral auger to grind the waste slag. The waste slag is transported to the electromagnetic disk through the rotation of the spiral auger, and then the waste slag is magnetically separated, thereby reducing the operation process and greatly saving the time of grinding and magnetic separation. BRIEF DESCRIPTION OF THE DRAWINGS

[0034] In order to more clearly illustrate the specific embodiments of the present invention or the technical solutions in the prior art, the following briefly introduces the drawings required for use in the specific embodiments or the description of the prior art. Obviously, the drawings described below are some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0035] Figure 1 It is a schematic diagram of the three-dimensional structure of the present invention;

[0036] Figure 2 Schematic diagram of the three-dimensional structure of the grinding and selection mechanism of the present invention;

[0037] Figure 3 is a cross-sectional view of the cone block of the present invention;

[0038] Figure 4 Schematic diagram of the three-dimensional structure of the cone block of the present invention;

[0039] Figure 5 It is a schematic diagram of the three-dimensional structure of the box body of the present invention;

[0040] Figure 6 It is a schematic diagram of the three-dimensional structure of the cylinder and the spiral auger of the present invention;

[0041] Figure 7 Schematic diagram of the three-dimensional structure of the electromagnetic disk of the present invention;

[0042] Figure 8 It is a schematic diagram of the three-dimensional structure of the scraping box of the present invention;

[0043] Figure 9 is a schematic diagram of the three-dimensional structure of the buffer module of the present invention;

[0044] Figure 10 It is a partial cross-sectional view of the three-dimensional structure of the present invention;

[0045] Figure 11 A partial cross-sectional view of the entire present invention;

[0046] Figure 12 For the present invention Figure 11 Enlarged view of point A above;

[0047] Figure 13 It is a diagram of the overall working principle of the present invention;

[0048] Figure 14 It is a process flow chart of the present invention.

[0049] In the figure: 1. Feeding port; 2. Motor; 3. Fixing frame; 4. Supporting frame; 5. Grinding and selecting mechanism; 51. Conical block; 511. Circular through hole; 512. Spiral ring; 513. Circular ring; 514. Rectangular sheet; 515. Conical groove; 516. Steel ball; 52. Cylinder; 521. Ring sheet; 53. Rotating disk; 54. Cylinder; 541. Rectangular through hole; 542. Arc hole; 55. Auger; 56. Electromagnetic disk; 561. Arc magnetic sheet; 562. Partition; 563. Circular hole; 564. Annular protrusion; 57. Scraping box; 571. Arc groove; 58. Buffer module; 581. Ring block; 582. Compression spring; 6. Discharging port; 7. Box body; 71. Conical groove; 72. Bottom groove; 8. Support. DETAILED DESCRIPTION

[0050] In order to better understand the above technical solution, the above technical solution will be described in detail below with reference to the accompanying drawings and specific implementation methods.

[0051] like Figures 1 to 13 As shown, a device for extracting lithium from waste slag after lithium extraction from lepidolite ore comprises a feed port 1, a motor 2, a fixing frame 3, a support frame 4, a discharge port 6, a box body 7 and a support 8; the feed port 1 is mounted above the box body 7, the motor 2 is mounted above the box body 7, the fixing frame 3 is mounted around the outside of the motor 2, the four ends of the fixing frame 3 are mounted on the support frame 4, the support frame 4 is mounted above the box body 7, the discharge port 6 is mounted above the box body 7, and is symmetrical with the feed port 1. Supports 8 are installed around the bottom of the box body 7, and it also includes a grinding mechanism 5. The grinding mechanism 5 is fixedly installed on the box body 7 and is connected to the motor 2. The grinding mechanism 5 drives the cone block 51 to rotate through the rotation of the motor 2. The rotating cone block 51 grinds the waste slag and falls to the bottom of the box body 7. Then, the waste slag is transported to the electromagnetic disk 56 through the spiral auger 55. The electromagnetic disk 56 will rotate to generate centrifugal force and electromagnetic adsorption force, and centrifugally separate the non-metallic fragments inside the waste slag.

[0052] When lithium is extracted from lepidolite ore and the waste slag is used to extract lithium again, first, a worker needs to pour the waste slag into the box body 7 through the feed port 1, and then control the motor 2 to start. The start of the motor 2 will drive the grinding mechanism 5 inside the box body 7 to start, thereby grinding the waste slag again, making the waste slag particle diameter smaller, and then magnetic separation is performed through the grinding mechanism 5 of the motor 2, and finally the non-metallic slag is separated by centrifugal force, thereby completing the grinding and magnetic separation of the waste slag, saving time, and greatly improving the efficiency of lithium extraction from waste slag.

[0053] like Figure 2As shown, the grinding and selection mechanism 5 includes a cone block 51, a cylinder 52, a rotating disk 53, a cylinder 54, a spiral auger 55, an electromagnetic magnetic disk 56, a scraper box 57 and a buffer module 58; the cone block 51 is located inside the box body 7, and the cone block 51 is gap-fitted with the inner wall of the box body 7. The top of the cone block 51 is installed with a cylinder 52, and the top of the cylinder 52 is fixedly installed with a rotating disk 53. The cylinder 52 is provided with a ring piece 521. The center position of the cone block 51 is installed with a cylinder 54, the interior of the cylinder 54 is installed with a spiral auger 55, the top of the cylinder 54 is installed with an electromagnetic magnetic disk 56, and a scraper box 57 is installed above the electromagnetic magnetic disk 56. The top outer surface of the electromagnetic magnetic disk 56 and the bottom of the scraper box 57 are movably fitted with each other, and the buffer module 58 is installed at the bottom of the cone block 51.

[0054] When grinding the waste slag, first, the motor 2 needs to be started, and then the rotation of the motor 2 will drive the spiral auger 55 and the rotating disk 53 to rotate. The rotating disk 53 transmits the power to the cone block 51 through the cylinder 52. The cone block 51 rotates inside the box 7 and grinds the waste slag entering from the feed port 1. The ground waste slag will accumulate at the bottom of the box 7, and then contact each other with the spiral auger 55 through the cylinder 54. As the spiral auger 55 rotates, the waste slag will be transported and transported to the top of the cylinder 54, and then fall into the electromagnetic disk. 56, and the electromagnetic disk 56 will be energized to generate electromagnetic adsorption force, which will adsorb the metal fragments inside the waste slag, while the non-metallic fragments will be separated from the electromagnetic disk 56 due to the centrifugal force generated by the rotation of the electromagnetic disk 56, and will be thrown into the surrounding of the electromagnetic disk 56, and finally discharged through the discharge port 6. When the cone block 51 rotates and grinds, a certain vibration will be generated, and the buffer module 58 will buffer the cone block 51 and automatically adjust the gap between it and the inner wall of the box body 7, so that the efficiency and purity of lithium extraction from the waste slag will be greatly improved in the subsequent lithium extraction process.

[0055] like Figure 3 、 Figure 4 、 Figure 10 、 Figure 11 and Figure 12 As shown, a circular through hole 511 is provided at the center of the cone block 51, a spiral ring 512 is provided on the conical surface of the cone block 51, a circular ring 513 is provided on the top of the cone block 51, a rectangular piece 514 is provided below the circular ring 513, a conical groove 515 is provided inside the cone block 51, and a steel ball 516 is placed inside the conical groove 515.

[0056] When the cone block 51 rotates, the spiral ring 512 on the cone block 51 will rotate along with the cone block 51 on the inner wall of the box body 7, and the rectangular piece 514 below the circular ring 513 on the top of the cone block 51 will rotate along with the rotation of the cone block 51, and push the waste slag at the feed port 1 outside the cone block 51, so that all the waste slag can enter between the cone block 51 and the box body 7 for grinding, thereby accelerating the grinding efficiency of the waste slag. At the same time, as the cone block 51 rotates, the steel ball 516 inside the cone block 51 will rotate along with the cone block 51, thereby generating greater centrifugal force and inertial force, so that the gap between the cone block 51 and the box body 7 in the radial direction can be fine-tuned by itself, thereby making the grinding effect of the waste slag better and greatly improving the grinding efficiency of the waste slag.

[0057] like Figure 5 As shown, a conical groove 71 is provided on the top of the box body 7, and a bottom groove 72 is provided at the bottom of the conical groove 71. The bottom groove 72 is a conical structure.

[0058] like Figure 6 As shown, a rectangular through hole 541 is opened on the top side of the cylinder 54, and an arc-shaped hole 542 is opened at the bottom of the cylinder 54.

[0059] When the ground waste slag falls into the bottom trough 72 from between the box body 7 and the cone block 51 by gravity, it will enter the cylinder 54 through the arc hole 542 on the cylinder 54 inside the bottom trough 72, and as the spiral auger 55 inside the cylinder 54 rotates, the waste slag will be spirally transported up by the spiral auger 55 and transported to the top of the cylinder 54, and transported out through the rectangular through hole 541 at the top of the cylinder 54, thereby performing magnetic separation on the ground waste slag.

[0060] like Figure 7 As shown, the interior of the electromagnetic disk 56 is composed of multiple arc-shaped magnetic pieces 561. The electromagnetic disk 56 is a conical disk structure. The electromagnetic disk 56 of the conical disk structure is provided with partitions 562 around it.

[0061] like Figure 7 As shown, a circular hole 563 is opened at the center of the electromagnetic disk 56, and the angle between the extension line of the conical surface and the bottom surface of the electromagnetic disk 56 is a certain angle. The conical surface of the electromagnetic disk 56 is provided with annular protrusions 564 of different diameters.

[0062] When the electromagnetic magnet 56 rotates, it will be energized and will adsorb the metal debris through electromagnetic adsorption force, while the non-metallic debris will be separated from the electromagnetic magnet 56 due to the centrifugal force. The rotating electromagnetic magnet 56 will drive the surrounding partitions 562 to rotate, and collect and separate the non-metallic debris around it, and discharge it through the discharge port 6. When the electromagnetic magnet 56 rotates to the bottom of the scraper box 57, the arc-shaped magnetic sheet 561 under the scraper box 57 will be powered off and the metal debris on the electromagnetic magnet 56 will be scraped off and collected to prevent the metal debris on the electromagnetic magnet 56 from affecting the subsequent magnetic separation of waste slag, thereby greatly improving the lithium extraction efficiency of the subsequent waste slag.

[0063] like Figure 8 、 Figure 10 、 Figure 11 and Figure 12 As shown, the scraper box 57 is an arc-shaped structure, and the bottom of the arc-shaped scraper box 57 is an inclined bottom surface, and a plurality of arc-shaped grooves 571 of different diameters are opened on the inclined bottom surface, and the arc-shaped grooves 571 cooperate with the annular protrusions 564 on the electromagnetic disk 56.

[0064] As the electromagnetic disk 56 rotates, when the electromagnetic disk 56 moves to the bottom of the scraper box 57, the arc-shaped magnetic piece 561 on the bottom of the scraper box 57 will be powered off, and the metal debris on the electromagnetic disk 56 will not be affected by the electromagnetic adsorption force, and will be scraped into the scraper box 57 by the scraper box 57, thereby completing the collection of the metal debris and ensuring that the waste slag after subsequent grinding will fall onto the electromagnetic disk 56 again, so that the metal debris can be magnetically separated more efficiently.

[0065] like Figure 9 and Figure 11 As shown, the buffer module 58 includes an annular block 581 and a compression spring 582. The bottom of the annular block 581 is clamped with the compression spring 582, and the compression spring 582 is clamped to the bottom of the box body 7. The diameter of the annular block 581 is slightly larger than the diameter of the cylinder 54.

[0066] When grinding waste slag, the cone block 51 will rotate on the annular block 581, and the compression spring 582 will be slightly compressed. During the rotation process, the compression spring 582 can reduce the vibration and buffer the rotating cone block 51, and the cone block 51 can autonomously adjust the gap between it and the inner wall of the box body 7 according to its own rotation speed, thereby greatly improving the grinding efficiency of the slag.

[0067] like Figure 14 As shown, the process for extracting lithium from waste slag after lithium extraction from lepidolite ore comprises the following steps:

[0068] S1: First, the waste slag after lithium extraction from lepidolite ore is slowly poured into the interior of the box 7 through the feed port 1, and then the grinding and separation mechanism 5 inside the box 7 is started;

[0069] S2: The grinding and screening mechanism 5 is started, the motor 2 will rotate, and drive the rotating disk 53 and the spiral auger 55 to rotate. The rotating disk 53 transmits power to the cone block 51, and the cone block 51 rotates to grind the waste slag. The ground waste slag will fall to the bottom of the box 7 by gravity;

[0070] S3: After the waste slag falls into the bottom of the box 7, it will slowly accumulate. Due to the rotation of the spiral auger 55, the waste slag accumulated at the bottom of the box 7 is transported to the top of the spiral auger 55 and discharged through the rectangular through-hole 541 at the top of the cylinder 54;

[0071] S4: The discharged waste slag will fall onto the electromagnetic disk 56. The electromagnetic disk 56 will be energized to generate electromagnetic force, which will absorb the metal debris inside the waste slag. Since the electromagnetic disk 56 is always rotating, the non-metallic debris will be separated from the electromagnetic disk 56 due to centrifugal force. The non-metallic debris around the electromagnetic disk 56 will be scraped to the discharge port 6 by the partition 562 for discharge.

[0072] S5: The metal debris will rotate with the electromagnetic disk 56. When the electromagnetic disk 56 rotates to the bottom of the scraper box 57, the area of ​​the electromagnetic disk 56 below the scraper box 57 will be powered off and the magnetism will disappear. The metal debris on the electromagnetic disk 56 will be collected inside the scraper box 57.

[0073] S6: The waste slag is magnetically collected by the electromagnetic disk 56 and discharged through the discharge port 6 to complete the magnetic separation of the waste slag. The waste slag after magnetic separation needs to be acid leached or alkaline leached, and then separated and purified to obtain pure lithium.

[0074] When working, Figure 13 As shown, after lithium extraction from lepidolite ore, when the waste slag is used to extract lithium again, first, workers need to pour the waste slag into the box body 7 through the feed port 1, and then control the motor 2 to start. The start of the motor 2 will drive the grinding mechanism 5 inside the box body 7 to start. The rotation of the motor 2 will drive the spiral auger 55 and the rotating disk 53 to rotate. The rotating disk 53 transmits power to the cone block 51 through the cylinder 52. The cone block 51 rotates inside the box body 7, and the spiral ring 512 on the cone block 51 will rotate along with the cone block 51 on the inner wall of the box body 7, and the top of the cone block 51 The rectangular piece 514 below the circular ring 513 will rotate with the rotation of the cone block 51, and push the waste slag at the feed port 1 outside the cone block 51, so that all the waste slag can enter between the cone block 51 and the box body 7 for grinding, thereby accelerating the grinding efficiency of the waste slag. At the same time, as the cone block 51 rotates, the steel ball 516 inside the cone block 51 will rotate with the cone block 51, thereby generating greater centrifugal force and inertial force, so that the gap between the cone block 51 and the box body 7 in the radial direction can be fine-tuned by itself, thereby achieving a better grinding effect of the waste slag.

[0075] When the ground waste slag falls into the bottom trough 72 from between the box body 7 and the cone block 51 by gravity, it will enter the cylinder 54 through the arc hole 542 on the cylinder 54 inside the bottom trough 72. As the spiral auger 55 inside the cylinder 54 rotates, the waste slag will be spirally transported up by the spiral auger 55 and transported to the top of the cylinder 54. It is transported out through the rectangular through hole 541 at the top of the cylinder 54 and then falls onto the electromagnetic disk 56. In addition, the electromagnetic disk 56 will be energized to generate electromagnetic attraction force to absorb the metal fragments inside the waste slag, while the non-metallic fragments will be separated from the electromagnetic disk 56 due to the centrifugal force generated by the rotation of the electromagnetic disk 56 and thrown away. When the waste slag enters the electromagnetic magnetic disk 56, the rotating electromagnetic magnetic disk 56 will drive the surrounding partitions 562 to rotate and collect the non-metallic slag around between the partitions 562. When the partitions 562 rotate to the discharge port 6, the waste slag is discharged through the discharge port 6 due to centrifugal force. When the electromagnetic magnetic disk 56 rotates to the bottom of the scraper box 57, the arc-shaped magnetic sheet 561 under the scraper box 57 will be powered off, so that the metal debris on the electromagnetic magnetic disk 56 is not affected by the electromagnetic adsorption force and is scraped into the scraper box 57 by the scraper box 57, thereby completing the collection of the metal debris and ensuring that the waste slag after subsequent grinding falls onto the electromagnetic magnetic disk 56, so that the metal debris can be magnetically separated more efficiently.

[0076] When the waste slag is ground, the cone block 51 will rotate on the annular block 581, and the compression spring 582 will be slightly compressed. During the rotation, the compression spring 582 can reduce vibration and buffer the rotating cone block 51, and the cone block 51 can autonomously adjust the gap between it and the inner wall of the box 7 according to its own rotation speed, thereby improving the grinding efficiency of the slag, and greatly improving the efficiency and purity of lithium extraction from the waste slag in the subsequent lithium extraction process.

[0077] The basic principles, main features, and advantages of the present invention are shown and described above. Those skilled in the art should understand that the present invention is not limited to the foregoing embodiments. The foregoing embodiments and descriptions are merely illustrative of the principles of the present invention. Various changes and modifications may be made to the present invention without departing from the spirit and scope of the present invention. Such changes and modifications are intended to fall within the scope of the present invention. The scope of protection claimed in the present invention is defined by the appended claims and their equivalents.

Claims

1. A device for extracting lithium from waste slag after lithium extraction from lepidolite ore, comprising a feed port, a motor, a fixing frame, a support frame, a discharge port, a box body, and a support; the feed port is mounted above the box body, the motor is mounted above the box body, the fixing frame is mounted on the outer periphery of the motor, the four ends of the fixing frame are mounted on the support frame, the support frame is mounted above the box body, the discharge port is mounted above the box body and is symmetrical with the feed port, and supports are mounted around the bottom periphery of the box body, characterized in that: The machine also includes a grinding mechanism, which is fixedly mounted on the box and connected to a motor. The grinding mechanism drives the cone block to rotate through the rotation of the motor. The rotating cone block grinds the waste slag and drops it to the bottom of the box. The waste slag is then transported to the electromagnetic disk through a spiral auger. The electromagnetic disk rotates to generate centrifugal force and electromagnetic adsorption force, and centrifugally separates the non-metallic debris inside the waste slag. The grinding and selection mechanism includes the cone block, the cylinder, the rotating disk, the cylinder, the spiral auger, the electromagnetic disk, the scraper box and the buffer module; the cone block is located inside the box body, the cone block is gap-fitted with the inner wall of the box body, the cylinder is installed on the top of the cone block, the rotating disk is fixedly installed on the top of the cylinder, the cylinder is provided with a ring sheet, the center position of the cone block is installed, the spiral auger is installed inside the cylinder, the electromagnetic disk is installed on the top of the cylinder, the scraper box is installed above the electromagnetic disk, the top outer surface of the electromagnetic disk and the bottom of the scraper box are movably fitted together, and the buffer module is installed at the bottom of the cone block; The buffer module can autonomously adjust the gap between the cone block and the box body, thereby grinding the waste slag more efficiently and making the waste slag finer; A circular through hole is provided at the center of the cone block, a spiral ring is provided on the cone surface of the cone block, a circular ring is provided on the top of the cone block, a rectangular sheet is provided below the circular ring, a conical groove is provided inside the cone block, and a steel ball is placed inside the conical groove; The interior of the electromagnetic disk is composed of multiple arc-shaped magnetic disks. The electromagnetic disk has a conical disk structure and is surrounded by partitions. The conical surface of the electromagnetic disk is provided with annular protrusions of different diameters. The annular protrusions are spaced gradually from the center to the circumference in the radial direction. The scraper box is an arc-shaped structure, and the bottom of the arc-shaped scraper box is an inclined bottom surface, and a plurality of arc-shaped grooves of different diameters are opened on the inclined bottom surface, and the arc-shaped grooves cooperate with the annular protrusions on the electromagnetic disk; As the cone block rotates, the steel ball inside the cone block will rotate with the cone block, thereby generating greater centrifugal force and inertial force, so that the gap between the cone block and the box in the radial direction can be fine-tuned by itself.

2. The device for extracting lithium from waste slag after lithium extraction from lepidolite ore according to claim 1, characterized in that: A conical groove is formed on the top of the box body, and a bottom groove is formed on the bottom of the conical groove. The bottom groove is a conical structure.

3. The device for extracting lithium from waste slag after lithium extraction from lepidolite ore according to claim 1, characterized in that: A rectangular through hole is provided on the top side of the cylinder, and an arc-shaped hole penetrating the bottom is provided on the bottom of the cylinder.

4. The device for extracting lithium from waste slag after lithium extraction from lepidolite ore according to claim 1, characterized in that: A circular hole is provided at the center of the electromagnetic disk, and the angle between the extended line of the conical surface and the bottom surface of the electromagnetic disk is a certain angle.

5. The device for extracting lithium from waste slag after lithium extraction from lepidolite ore according to claim 1, characterized in that: The buffer module includes an annular block and a compression spring. The bottom of the annular block is clamped with the compression spring, and the compression spring is clamped to the bottom of the box. The diameter of the annular block is slightly larger than the diameter of the cylinder.

6. A process for re-extracting lithium from waste slag after lithium extraction from lepidolite ore, the process using the device for re-extracting lithium from waste slag after lithium extraction from lepidolite ore according to any one of claims 1 to 5, characterized in that: The process for extracting lithium again from waste slag after lithium extraction from lepidolite ore The following steps are involved: S1: First, the waste slag after lithium extraction from lepidolite ore is slowly poured into the box through the feed port, and then the grinding and separation mechanism inside the box is started; S2: The grinding mechanism starts, the motor will rotate, and drive the rotating disk and the spiral auger to rotate. The rotating disk transmits power to the cone block, and the cone block rotates to grind the waste slag. The ground waste slag will fall to the bottom of the box by gravity; S3: After the waste slag falls into the bottom of the box, it will slowly accumulate. Due to the rotation of the spiral auger, the waste slag accumulated at the bottom of the box will be transported to the top of the spiral auger and discharged through the rectangular through-hole at the top of the cylinder; S4: The discharged waste slag will fall onto the electromagnetic disk, which will be energized to generate electromagnetic force and absorb the metal debris inside the waste slag. Since the electromagnetic disk is always rotating, the non-metallic debris will be separated from the electromagnetic disk due to centrifugal force, and the non-metallic debris around the electromagnetic disk will be scraped to the discharge port through the partition for discharge; S5: The metal debris will rotate with the electromagnetic disk. When the electromagnetic disk rotates to the bottom of the scraper box, the area of ​​the electromagnetic disk below the scraper box will be powered off and the magnetism will disappear. The metal debris on the electromagnetic disk will be collected inside the scraper box. S6: The waste slag is magnetically separated and collected by an electromagnetic disk and discharged through a discharge port to complete the magnetic separation of the waste slag. The waste slag after magnetic separation needs to be acid leached or alkaline leached, and then separated and purified to obtain pure lithium.

Images