Low-grade lithium ore extraction device

Abstract

The invention provides a low-grade lithium ore extraction device which comprises an ore dressing bin, electrode plates, an insulating tape conveyor, a winnowing tank, a feeding pipe, a stock bin and a first fan, the ore dressing bin is vertically installed through a support, the two electrode plates are symmetrically installed in an inner cavity of the ore dressing bin, and the insulating tape conveyor surrounds the outer sides of the electrode plates; the winnowing tank is arranged on the lower portion of the mineral separation bin. Lithium ore powder flows between the electrode plates from bottom to top through wind power, the speed of the ore powder can be controlled through the wind power, so that the time of the ore powder in an electrostatic field is prolonged, the ore powder can effectively deflect in the electrostatic field, the ore dressing efficiency is improved, meanwhile, the winnowing tank is arranged between the ore dressing bin and the feeding pipe, and the ore dressing efficiency is improved. And the air speed is reduced after the pipe diameter of the middle of the winnowing tank is increased, so that the lithium ore powder with large particle size is settled under the action of gravity so as to be conveniently collected and subjected to secondary grinding for ore separation again, the ore separation efficiency is improved, and the extraction efficiency of lithium resources is improved.

Description

Technical Field

[0001] The invention relates to the technical field of lithium ore extraction equipment, and in particular to a low-grade lithium ore extraction device. Background Art

[0002] Lithium ore resources mainly include salt lake brine type, hard rock ore type and clay ore type. Among them, my country has a large reserve of clay-type lithium resources. However, the lithium grade of clay ore is usually low, and it is difficult to enrich. For this reason, people have studied many methods for enriching and extracting lithium resources from low-grade clay ores. For example, the Chinese patent with application number 202211534249.1 discloses a method for extracting lithium from clay-type lithium ore, including: crushing the clay-type lithium ore and mixing it with an aqueous solution to form a mixed slurry; after the mixed slurry is allowed to settle, the upper slurry is taken, the upper slurry is dried to form a mineral material, and the mineral material is transported to an electrostatic field for electrostatic separation to obtain a concentrate powder; the concentrate powder is subjected to a lithium extraction operation to obtain lithium salt. This scheme separates the montmorillonite by passing the ore material through an electrostatic field and using the principle that the lithium-containing montmorillonite will deviate in the electrostatic field, so that the original ore with a lithium oxide content of 0.2% can be converted into a concentrate with a lithium oxide content of 1-2%. For example, the electrostatic induction gold powder beneficiation equipment disclosed in the Chinese patent application No. 201210166113.X is a commonly used electrostatic beneficiation device. The powder moves downward from the upper part of the device, and forms an electrostatic field on the path of the falling powder through the electrode plate in the device to achieve separation. However, in actual use, since the powder falls from top to bottom, it is affected by gravity when falling, and the speed will be faster, and the time in the electrostatic field is shorter. Secondly, after the clay ore is crushed and ground, the particle size of the powder is different. , the deflection is also different when affected by the electric field. Some mineral powders with larger particle sizes have small deflection and need secondary grinding. However, the device cannot effectively separate the mineral powders with larger particle sizes, resulting in low efficiency in actual mineral processing. Some lithium ores cannot be effectively selected. Therefore, a low-grade lithium ore extraction device is needed, which adopts a bottom-up material flow direction, a slow flow rate of the mineral powder, and a long time in the electrostatic field, which is convenient for mineral processing. At the same time, a wind separation tank is set on the feed pipe, and some mineral powders with larger particle sizes can settle, thereby improving the efficiency of mineral processing and the extraction efficiency of lithium resources. Summary of the invention

[0003] In order to solve the above problems, the present invention proposes a low-grade lithium ore extraction device, which adopts a bottom-up material flow direction, the flow rate of the ore powder is slow, and the time in the electrostatic field is long, which is convenient for ore dressing. At the same time, an air separation tank is arranged on the feed pipe, and some ore powders with larger particle sizes can be settled, thereby improving the efficiency of ore dressing and the extraction efficiency of lithium resources.

[0004] The present invention is achieved through the following technical solutions: The present invention proposes a low-grade lithium ore extraction device, including: a beneficiation bin, an electrode plate, an insulating belt conveyor, a pneumatic tank, a feeding pipe, a silo, and a first fan. The beneficiation bin is vertically installed through a bracket, and two electrode plates are symmetrically installed in the inner cavity of the beneficiation bin. The insulating belt conveyor surrounds the outside of the electrode plate. The pneumatic tank is arranged at the lower part of the beneficiation bin, and the upper end of the pneumatic tank extends upward to below the insulating belt conveyor. The silo is connected to the feeding pipe, one end of the feeding pipe is connected to the pneumatic tank, and the other end of the feeding pipe is connected to the first fan.

[0005] Furthermore, a first discharge pipe and a second discharge pipe are provided on the upper part of the ore dressing bin, and a movable baffle is provided between the first discharge pipe and the second discharge pipe. The upper end of the movable baffle is hinged above the ore dressing bin, and the lower end of the movable baffle extends between the insulating belt conveyors, and the lower end of the movable baffle can swing around the upper end of the movable baffle.

[0006] Furthermore, the diameter of the middle part of the air separation tank is 2 to 4 times the diameter of the upper part of the air separation tank, and the feed pipe is connected to the middle part of the air separation tank from the side.

[0007] Furthermore, a third discharge pipe is provided at the lower part of the air separation tank, and a discharge valve is provided on the third discharge pipe.

[0008] Furthermore, scrapers are provided between the upper sides of the air separation tank and the insulating belt conveyor, and the ends of the scrapers extend toward the outside of the insulating belt conveyor.

[0009] Furthermore, a connecting plate is provided on the upper part of the air separation tank, a long waist hole is provided on the scraper, and the scraper is connected to the connecting plate by bolts, and the bolts pass through the long waist hole.

[0010] Furthermore, an annular air duct is provided on the outer side of the upper portion of the air separation tank, and the annular air duct is connected to the second fan through the first air duct.

[0011] Furthermore, an air guide plate is provided on the inner side of the upper part of the air separation tank. The air guide plate is annular, and the lower part of the air guide plate is connected to the upper inner wall of the air separation tank. A gap is left between the upper part of the air guide plate and the upper inner wall of the air separation tank. The annular air guide duct is connected to the air guide plate through a through hole.

[0012] Furthermore, the air separation tank is provided with a fourth discharge pipe and a fifth discharge pipe below the scraper.

[0013] Furthermore, the electrode plates are parallel to each other, and are connected to a high-voltage power source via a wire, and the insulating belt is transported toward one side near the center of the air separation tank and moves upward.

[0014] The beneficial effects of the present invention are as follows: the lithium ore powder is made to flow from bottom to top between the electrode plates by wind force, and the speed of the ore powder can be controlled by wind force, thereby prolonging the time that the ore powder is in the electrostatic field so that the ore powder can be effectively deflected in the electrostatic field, thereby improving the efficiency of mineral processing. At the same time, an air separation tank is arranged between the mineral processing bin and the feeding pipe, and the wind speed is reduced by increasing the pipe diameter in the middle of the air separation tank, so that the lithium ore powder with larger particle size is settled under the action of gravity, so that it is easy to collect and perform secondary grinding before mineral processing again, thereby improving the efficiency of mineral processing and the extraction efficiency of lithium resources. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 It is a structural schematic diagram of the present invention;

[0016] Figure 2 It is a structural schematic diagram of the annular air guide pipe of the present invention;

[0017] In the figure: 1-ore dressing bin, 2-electrode plate, 3-insulating belt conveyor, 4-air separation tank, 5-feeding pipe, 6-bin, 7-first fan, 8-first discharge pipe, 9-second discharge pipe, 10-movable baffle, 11-third discharge pipe, 12-scraper, 13-connecting plate, 14-fourth discharge pipe, 15-fifth discharge pipe, 16-annular air guide pipe, 17-first air duct, 18-second fan, 19-air guide plate. DETAILED DESCRIPTION

[0018] The technical solutions in the embodiments of the present invention will be described clearly and completely below in conjunction with the drawings in the embodiments of the present invention, wherein the same or similar reference numerals throughout represent the same or similar elements or elements with the same or similar functions. Obviously, the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection of the present invention.

[0019] It should be noted that all directional indications in the embodiments of the present invention (such as up, down, left, right, front, back, etc.) are only used to explain the relative position relationship, movement status, etc. between the components under a certain specific posture (as shown in the accompanying drawings). If the specific posture changes, the directional indication will also change accordingly.

[0020] In addition, the descriptions of "first", "second", etc. in the present invention are only used for descriptive purposes and cannot be understood as indicating or implying their relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" and "second" may explicitly or implicitly include at least one of the said features. In addition, the technical solutions between the various embodiments can be combined with each other, but they must be based on the ability of ordinary technicians in the field to implement them. When the combination of technical solutions is contradictory or cannot be implemented, it should be deemed that such combination of technical solutions does not exist and is not within the scope of protection required by the present invention.

[0021] like Figure 1 , Figure 2 As shown, an embodiment of the present invention provides a low-grade lithium ore extraction device, including: a beneficiation bin 1, an electrode plate 2, an insulating belt conveyor 3, an air separation tank 4, a feeding pipe 5, a silo 6, and a first fan 7. The beneficiation bin 1 is vertically installed by a bracket, two electrode plates 2 are symmetrically installed in the inner cavity of the beneficiation bin 1, the insulating belt conveyor 3 surrounds the outside of the electrode plate 2, the air separation tank 4 is arranged at the lower part of the beneficiation bin 1, and the upper end of the air separation tank 4 extends upward to below the insulating belt conveyor 3, the silo 6 is connected to the feeding pipe 5, one end of the feeding pipe 5 is connected to the air separation tank 4, and the other end of the feeding pipe 5 is connected to the first fan 7.

[0022] During mineral processing, low-grade clay lithium ore is crushed and ground, and then water is added and stirred. Since montmorillonite absorbs water and expands, its density is relatively low, so it is concentrated on the upper slurry. After 5 to 8 hours of sedimentation, the upper slurry is taken, dried and crushed, and then sent to the silo 6. The ore powder in the silo 6 enters the feeding pipe 5 and is blown into the air separation tank 4 under the action of the first fan 7. Since the inner diameter of the air separation tank 4 increases, the wind speed at this position decreases, so some ore powders with larger particle sizes are not subjected to enough wind force to resist gravity, so that these ore powders settle to the bottom of the air separation tank 4 and are discharged from the third fan 7. After being discharged from the discharge pipe 11, the mineral powder is collected and ground twice before being sent to the silo 6. The mineral powder after passing through the air separation tank 4 is blown into the ore dressing bin 1 under the action of wind. The electrode plate 2 is connected to the high-voltage power supply, thereby forming an electrostatic field in the ore dressing bin 1. Since the lithium element exists in the form of lithium ions in the interlayer domain containing hectorite, these mineral powders will be deflected when passing through the electrostatic field, and the montmorillonite mineral powder containing lithium element will be selected from other mineral powders to achieve lithium element enrichment. The selected mineral powder is discharged from the first discharge pipe 8, and other mineral powders are discharged from the second discharge pipe 9 to achieve ore dressing.

[0023] Before entering the mineral processing bin 1, the mineral powder first passes through the air separation tank 4 to remove the mineral powder with larger particle size or that is stuck together. These mineral powders have small deflection in the electric field and are prone to cause the loss of lithium elements. Therefore, they need to be collected and then crushed for the second time to improve the mineral processing accuracy of lithium elements.

[0024] Secondly, the mineral powder of this device passes through the electrostatic field from bottom to top, so that the mineral powder can pass through the electrostatic field at a uniform speed. Compared with the top-down direction, the mineral powder can pass through the electrostatic field at a lower speed when passing through the electrostatic field from bottom to top, thereby extending the time the mineral powder stays in the electrostatic field, so that the montmorillonite mineral powder containing lithium elements can be affected by the electrostatic field for a longer time, thereby improving the efficiency of mineral processing and at the same time increasing the extraction ratio of lithium elements.

[0025] In a specific embodiment, a first discharge pipe 8 and a second discharge pipe 9 are provided on the upper part of the ore dressing bin 1, and a movable baffle 10 is provided between the first discharge pipe 8 and the second discharge pipe 9. The upper end of the movable baffle 10 is hinged above the ore dressing bin 1, and the lower end of the movable baffle 10 extends to between the insulating belt conveyor 3. The lower end of the movable baffle 10 can swing around the upper end of the movable baffle 10. After the mineral powder is deflected in the electrostatic field, the ratio of the mineral powder entering the first discharge pipe 8 and the second discharge pipe 9 can be adjusted through the movable baffle 10, so as to separate the montmorillonite mineral powder containing lithium elements from other mineral powders, increase the proportion of lithium elements extracted from the ore, and realize the enrichment of lithium elements.

[0026] Preferably, the diameter of the middle part of the air separation tank 4 is 2 to 4 times the diameter of the upper part of the air separation tank 4, and the feed pipe 5 is connected to the middle part of the air separation tank 4 from the side. After the mineral powder enters the air separation tank 4 from the feed pipe 5, the wind speed will decrease due to the sudden increase in the inner diameter. At this time, the larger particles in the mineral powder and the particles stuck together will settle because the wind force is not enough to offset the gravity. Compared with the small particles of mineral powder, these mineral powders have less deflection in the electrostatic field, resulting in inaccurate mineral separation. The settled mineral powder is fed into the silo 6 after secondary grinding for mineral separation again.

[0027] In a specific embodiment, a third discharge pipe 11 is provided at the bottom of the air separation tank 4, and a discharge valve is provided on the third discharge pipe 11 to facilitate the discharge of mineral powder settled at the bottom of the air separation tank 4. After secondary grinding, these mineral powders are sent to the silo 6 for mineral separation again.

[0028] In a preferred embodiment, a scraper 12 is provided between the upper sides of the air separation tank 4 and the insulating belt conveyor 3, and the end of the scraper 12 extends to the outside of the insulating belt conveyor 3. After the mineral powder is deflected, part of the mineral powder will be adsorbed on the insulating belt conveyor 3. After rotating one circle, the scraper 12 will scrape off the mineral powder on the upper part of the insulating belt conveyor 3 for easy collection.

[0029] In a preferred embodiment, a connecting plate 13 is provided on the upper part of the air separation tank 4, a long waist hole is provided on the scraper 12, and the scraper 12 is connected to the connecting plate 13 by bolts. The bolts pass through the long waist hole to adjust the distance between the scraper 12 and the insulating belt conveyor 3, so that the scraper 12 can better scrape off the mineral powder attached to the insulating belt conveyor 3.

[0030] In a preferred embodiment, an annular air duct 16 is provided on the outer side of the upper part of the air separation tank 4, and the annular air duct 16 is connected to the second fan 18 through the first air duct 17. The airflow generated by the second fan 18 is introduced into the upper part of the air separation tank 4 through the first air duct 17 and the annular air duct 16, so that the mineral powder can be blown into the ore dressing bin 1 after passing through the air separation tank 4.

[0031] Preferably, an air guide plate 19 is provided on the inner side of the upper part of the air separation tank 4. The air guide plate 19 is annular, and the lower part of the air guide plate 19 is connected to the upper inner wall of the air separation tank 4. A gap is left between the upper part of the air guide plate 19 and the upper inner wall of the air separation tank 4. The annular air guide duct 16 is connected with the air guide plate 19 through a through hole. In order to realize the mineral separation function of the air separation tank 4, the wind force generated by the first fan 7 will be relatively small. When the diameter in the mineral separation bin 1 is large, it is easy to cause the mineral powder to settle. Therefore, it is necessary to enhance the wind force through the second fan 18, and under the deflection effect of the air guide plate 19, the wind generated by the second fan 18 is blown upward without disturbing the airflow in the air separation tank 4, thereby ensuring the normal air separation of the air separation tank 4. After the air is sent in by the second fan 18, the mineral powder in the mineral separation bin 1 can also overcome the influence of gravity and move upward under the drive of the airflow, thereby realizing the operation of electrostatic field mineral separation.

[0032] In a preferred embodiment, the air separation tank 4 is provided with a fourth discharge pipe 14 and a fifth discharge pipe 15 below the scraper 12 to facilitate scraping and discharging the mineral powder attached to the insulating belt conveyor 3.

[0033] In a specific embodiment, the electrode plates 2 are parallel to each other, and the electrode plates 2 are connected to a high-voltage power supply through a wire. The insulating belt conveyor 3 moves upward near the center of the air separation tank 4, and an electrostatic field is generated by the electrode plates 2 to realize the operation of electrostatic field mineral separation. The insulating belt conveyor 3 can drive a part of the deflected mineral powder, which is scraped off by the scraper 12 after rotating one circle.

[0034] Of course, the present invention may have many other implementations. Based on this implementation, other implementations obtained by ordinary technicians in this field without any creative work are all within the scope of protection of the present invention.

Claims

1. A low-grade lithium ore extraction device, characterized in that: include: A ore dressing bin (1), an electrode plate (2), an insulating belt conveyor (3), an air separation tank (4), a feeding pipe (5), a silo (6), and a first fan (7), wherein the ore dressing bin (1) is vertically mounted by a bracket, two electrode plates (2) are symmetrically mounted in the inner cavity of the ore dressing bin (1), the insulating belt conveyor (3) surrounds the outer side of the electrode plate (2), the air separation tank (4) is arranged at the lower part of the ore dressing bin (1), and the upper end of the air separation tank (4) extends upward to the lower part of the insulating belt conveyor (3), the silo (6) is connected to the feeding pipe (5), one end of the feeding pipe (5) is connected to the air separation tank (4), and the other end of the feeding pipe (5) is connected to the first fan (7).

2. A low-grade lithium ore extraction device according to claim 1, characterized in that: A first discharge pipe (8) and a second discharge pipe (9) are provided on the upper part of the ore dressing bin (1); a movable baffle (10) is provided between the first discharge pipe (8) and the second discharge pipe (9); the upper end of the movable baffle (10) is hinged above the ore dressing bin (1); the lower end of the movable baffle (10) extends between the insulating belt conveyor (3); and the lower end of the movable baffle (10) can swing around the upper end of the movable baffle (10).

3. A low-grade lithium ore extraction device according to claim 1, characterized in that: The diameter of the middle part of the air separation tank (4) is 2 to 4 times the diameter of the upper part of the air separation tank (4), and the feeding pipe (5) is connected to the middle part of the air separation tank (4) from the side.

4. A low-grade lithium ore extraction device according to claim 3, characterized in that: A third discharge pipe (11) is provided at the lower part of the air separation tank (4), and a discharge valve is provided on the third discharge pipe (11).

5. A low-grade lithium ore extraction device according to claim 4, characterized in that: Scrapers (12) are provided between the upper sides of the air separation tank (4) and the insulating belt conveyor (3), and the ends of the scrapers (12) extend toward the outside of the insulating belt conveyor (3).

6. A low-grade lithium ore extraction device according to claim 5, characterized in that: The upper part of the air separation tank (4) is provided with a connecting plate (13), the scraper (12) is provided with a long waist hole, and the scraper (12) is connected to the connecting plate (13) by bolts, and the bolts pass through the long waist hole.

7. A low-grade lithium ore extraction device according to claim 1, characterized in that: An annular air duct (16) is provided on the outer side of the upper portion of the air separation tank (4), and the annular air duct (16) is connected to the second fan (18) via a first air duct (17).

8. A low-grade lithium ore extraction device according to claim 7, characterized in that: An air guide plate (19) is provided on the inner side of the upper part of the air separation tank (4). The air guide plate (19) is annular, and the lower part of the air guide plate (19) is connected to the inner wall of the upper part of the air separation tank (4). A gap is left between the upper part of the air guide plate (19) and the inner wall of the upper part of the air separation tank (4). The annular air guide pipe (16) is connected to the air guide plate (19) through a through hole.

9. A low-grade lithium ore extraction device according to claim 1, characterized in that: The air separation tank (4) is provided with a fourth discharge pipe (14) and a fifth discharge pipe (15) below the scraper (12).

10. A low-grade lithium ore extraction device according to claim 1, characterized in that: The electrode plates (2) are parallel to each other, and the electrode plates (2) are connected to a high-voltage power supply via a wire. The insulating belt conveyor (3) moves upward near the center of the air separation tank (4).

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