Disc screen type granulator

Abstract

The utility model discloses a disc screen type granulator which comprises a rack and a barrel arranged on the rack, the barrel comprises a screen drum and a stock bin arranged above the screen drum, a granulating mechanism is arranged in the screen drum, and a stirring mechanism is arranged in the stock bin. According to the lepidolite granulating machine, the stock bin is arranged above the screen drum, the stirring mechanism in the stock bin can be used for stirring various materials, so that the materials are uniformly mixed, the materials and water are prevented from being non-uniformly mixed by improving the mixing effect of the materials and the water, the lepidolite granulating effect is favorably improved, and the materials can be promoted to enter the screen drum; particularly, under the combined action of the granulating mechanism and the second scraper, the size of the formed particles can be controlled to be uniform and adjusted, finally, the mixed materials can be prepared into the particles which are uniform in size and meet the smelting requirement, the structure is simple, operation is convenient, the stirring and mixing effect of the materials and the resource utilization rate can be effectively improved, and the production cost is reduced. The granulator is a novel granulator and can be widely applied to granulation of lithium mineral mixed materials.

Description

Technical Field

[0001] The utility model belongs to the field of granulation equipment and relates to a disc screen type granulator, in particular to a disc screen type granulator suitable for granulation of lithium mica mixed materials. Background Art

[0002] Lithium carbonate is an important raw material in the lithium battery industry, and the demand for it is gradually increasing. Extracting lithium from lithium minerals is the main source of lithium carbonate. For example, the lithium extraction process using lithium mica as a lithium mineral raw material is the main process for producing lithium carbonate and has received great attention from the market.

[0003] In the traditional lithium extraction process, lithium mineral powder is usually placed in a rotary kiln for roasting, which has the following defects: easy kiln agglomeration, uneven roasting, large powder output, low subsequent leaching rate, etc., which can easily cause great economic losses and waste of resources. In view of the above defects, making lithium minerals into particles is an optional improvement solution.

[0004] Existing granulators include rotary granulators, which include a mesh ring, a grinding knife and a driving motor. The driving motor drives the grinding knife to rotate and squeeze the material toward the mesh ring and squeeze it out of the mesh holes on the mesh ring. The material squeezed out of the mesh holes is in granular form, and granulation is completed. However, when the rotary granulator is used for lithium mineral mixture granulation, the following shortcomings are inevitable: (1) Since no raw material mixing bin is provided, it is difficult to achieve uniform mixing of various materials, especially it is difficult to achieve uniform mixing of lithium minerals and water, which is easy to affect the granulation effect and ultimately make the obtained granules difficult to meet the requirements; if the various materials are first mixed evenly and then added to the mesh ring, due to the high viscosity of the lithium mineral mixture, it will not only increase the difficulty of transferring the lithium mineral mixture, but also make it difficult to improve the granulation efficiency, and it is also easy to cause a waste of raw materials; (2) directly adding the lithium mineral mixture to the mesh ring, due to the high viscosity of the lithium mineral mixture, it is easy to stick to the mesh ring. The wall makes it difficult to unload the material smoothly, and it is easy to form material accumulation, which is not conducive to improving production efficiency and affecting normal production; although the existing rotary granulator is provided with a pressing blade, it can only realize the downward pressure of the crushed material, but it is still difficult to effectively push the lithium mineral mixture adhering to the inner wall of the mesh ring to the bottom, and there are still serious material accumulation and the need for frequent cleaning; (3) Outside the mesh ring, since no scraper is provided, it is difficult to prepare particles of uniform size, which makes the prepared particles still prone to kiln agglomeration, uneven roasting, large powder output, and low subsequent leaching rate during the roasting process, affecting the lithium mica smelting effect. The existence of the above defects and deficiencies greatly limits the widespread use of rotary granulators in lithium mineral granulation. Therefore, it is of great significance to obtain a disc screen granulator with simple structure, convenient operation, uniform and easy-to-control particle size, high resource utilization rate, and particles that meet smelting requirements for promoting the rapid development of the lithium battery industry. Utility Model Content

[0005] The technical problem to be solved by the utility model is to provide a disc screen granulator with simple structure, convenient operation, uniform and easy-to-regulate particle size, high resource utilization rate and particles meeting smelting requirements in view of the deficiencies in the prior art.

[0006] In order to solve the above technical problems, the utility model adopts the following technical solutions.

[0007] A disc screen type granulator comprises a frame and a cylinder arranged on the frame, wherein the cylinder comprises a screen cylinder and a silo arranged above the screen cylinder; a granulating mechanism is arranged in the screen cylinder, and a stirring mechanism is arranged in the silo.

[0008] As a further improvement of the above technical solution: the granulation mechanism includes at least one extrusion arm; one end of the extrusion arm is detachably mounted on the main shaft, and the other end is detachably mounted with a wear-resistant block; the wear-resistant block extrude the material from the sieve holes on the screen drum into granules as the extrusion arm rotates; the size and shape of the wear-resistant block match the cavity of the screen drum; the wear-resistant block is arc-shaped.

[0009] As a further improvement of the above technical solution: the granulation mechanism also includes at least one scraper arm; one end of the scraper arm is detachably mounted on the main shaft, and the other end is detachably mounted with a first scraper; the first scraper scrapes the material from the inner wall of the screen cylinder to the screen hole as the scraper arm rotates; the size and shape of the first scraper match the cavity of the screen cylinder; the first scraper is plate-shaped.

[0010] As a further improvement of the above technical solution: the stirring mechanism includes a spiral stirring paddle connected to the main shaft; at least one group of spiral elements is detachably mounted on the spiral stirring paddle; each group of spiral elements includes at least one spiral blade; the spiral blades are distributed on the spiral stirring paddle along the circumferential direction.

[0011] As a further improvement of the above technical solution: the main shaft is arranged at the center of the cylinder, and the main shaft is connected to the main transmission mechanism after passing through the cylinder; the main transmission mechanism is arranged below the cylinder.

[0012] As a further improvement of the above technical solution: a material collecting mechanism is also provided on the frame; the material collecting mechanism includes a material collecting plate surrounding the bottom of the screen cylinder, and the material collecting plate is installed on the frame through a turntable bearing; the turntable bearing is connected to an auxiliary transmission mechanism; a material baffle plate is provided on the edge of the material collecting plate.

[0013] As a further improvement of the above technical solution: a scraping mechanism is also provided on the outside of the screen drum; the scraping mechanism includes a second scraper, and the second scraper is detachably mounted on the collecting plate; the second scraper scrapes particles off the outer wall of the screen drum as the collecting plate rotates; the size and shape of the second scraper match the outer wall of the screen drum; the second scraper is plate-shaped.

[0014] As a further improvement of the above technical solution: the rotation direction of the second scraper is the same as the rotation direction of the extrusion arm; the angle between the second scraper and the corresponding rotation direction of the extrusion arm is 3° to 10°.

[0015] As a further improvement of the above technical solution: the sieve drum is detachably mounted on the frame; the sieve drum is detachably connected to the silo via a clamp; a feed discharge port is provided between the sieve drum and the silo.

[0016] As a further improvement of the above technical solution: a lower hopper and a spray device are provided above the silo; the spray device includes at least one atomizing nozzle; the atomizing nozzle is distributed on the top of the silo;

[0017] As a further improvement of the above technical solution: the sieve cylinder is composed of multiple sieve plates, and the sieve plates are detachably mounted on the bracket; the bracket is detachably mounted on the frame; the sieve plates are provided with a plurality of sieve holes; a chassis is provided at the bottom of the sieve cylinder; the chassis is conical; and a wear-resistant lining is provided on the surface of the chassis.

[0018] Compared with the prior art, the advantages of the utility model are:

[0019] (1) The disc screen granulator of the utility model can mix the materials evenly by using the material bin above the sieve drum and the stirring mechanism to stir the materials, thereby improving the mixing effect of the materials and water, preventing the materials and water from being mixed unevenly, and being beneficial to improving the lepidolite granulation effect; at the same time, under the action of the stirring mechanism, the materials (especially the lithium mineral mixture with high viscosity) can be promoted to enter the sieve drum below, which is beneficial to improving the granulation efficiency. Finally, under the action of the granulation mechanism arranged in the sieve drum, the mixture can be made into particles of uniform size and meeting the smelting requirements. The utility model has not only a simple structure and convenient operation, but also can effectively improve the stirring and mixing effect of the materials, and has a high resource utilization rate. The utility model is a new type of granulator, which can be widely used in the granulation of lithium mineral mixtures, has high use value, and has a good application prospect.

[0020] (2) The utility model disc screen granulator is provided with an extrusion arm and a scraper arm in the screen drum, wherein the extrusion arm is composed of two curved arms, and the front end of the curved arm is connected with a wear-resistant block. The extrusion arm rotates counterclockwise, mainly for stirring, mixing, kneading and compacting the material, and extruding and granulating the material through the screen holes on the screen drum wall; the front end of the scraper arm is provided with a scraper, which mainly plays the role of scraping the material and stirring. At the same time, it is arranged above the extrusion arm to prevent the material from sticking to the top of the screen drum, improve the stirring and homogenizing effect of the material, and make the material more evenly mixed. It can be seen that under the mutual promotion of the extrusion arm and the scraper arm, not only the utilization rate of the material can be improved, but also the problem of material accumulation can be prevented, which is conducive to improving production efficiency.

[0021] (3) The utility model disc screen granulator is provided with a circulating scraper (second scraper) on the outside of the screen drum. The circulating scraper is installed on the collecting plate, close to the outer wall of the screen drum, rotates with the rotation of the collecting plate, and operates in the same direction and frequency as the extrusion arm. After the material is squeezed out of the screen hole, it is scraped off by the circulating scraper to form particles of uniform size, thereby avoiding uneven size of the extruded lithium mica particles, which affects the subsequent roasting effect; at the same time, the angle between the circulating scraper and the extrusion arm can be adjusted as needed, such as the angle between the two is 3° to 10°, thereby the particle size can be adjusted to obtain particles of different sizes and specifications, and the applicability is very good and can meet the actual production needs.

[0022] (4) In the disc screen granulator of the utility model, the bottom plate of the screen drum is set to be conical. During the extrusion of the material, the material accumulated in the center automatically flows outward along the conical surface under the action of gravity, avoiding accumulation in the center, thereby reducing the running resistance and the wear of the extrusion arm. At the same time, it is also conducive to promoting the extrusion and granulation of the material through the screen holes of the screen drum. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] In order to make the purpose, technical solution and advantages of the embodiments of the present utility model clearer, the technical solution in the embodiments of the present utility model will be clearly and completely described below in conjunction with the drawings in the embodiments of the present utility model.

[0024] Figure 1 It is a structural schematic diagram of a disc screen type granulator in an embodiment of the utility model.

[0025] Figure 2 It is a top view of the assembly of the screen cylinder, the extrusion arm and the scraper arm in the embodiment of the utility model.

[0026] Figure 3 It is a top view of the assembly of the silo and the spiral stirring paddle in the embodiment of the utility model.

[0027] Figure 4 It is a top view of the assembly of the lower hopper, the spray device and the circulating scraper in the embodiment of the utility model.

[0028] Figure 5 It is a schematic diagram of the structure of the sieve plate in the embodiment of the utility model.

[0029] Legend:

[0030] 1. Main transmission mechanism; 2. Frame; 3. Baffle plate; 4. Collecting tray; 5. Bracket; 6. Screen plate; 61. Screen hole; 7. Wear-resistant lining plate; 8. Cylinder; 9. Spiral stirring paddle; 91. Spiral blade; 10. Feed hopper; 11. Spraying device; 111. Atomizing nozzle; 12. Scraping arm; 13. Chassis; 14. Extrusion arm; 15. Main shaft; 16. Auxiliary transmission mechanism; 17. Wear-resistant block; 18. First scraper; 19. Feeding port; 20. Second scraper. DETAILED DESCRIPTION

[0031] The present invention is further described below in conjunction with the accompanying drawings and specific preferred embodiments, but the protection scope of the present invention is not limited thereby.

[0032] The materials and instruments used in the following examples are all commercially available.

[0033] Embodiment 1:

[0034] like Figure 1 As shown, the disc screen granulator of this embodiment includes a frame 2 and a cylinder 8 arranged on the frame 2, the cylinder 8 includes a screen cylinder and a silo arranged above the screen cylinder; a granulating mechanism is arranged in the screen cylinder, and a stirring mechanism is arranged in the silo.

[0035] like Figure 1 and Figure 2 As shown, in this embodiment, the granulation mechanism includes at least one extrusion arm 14, specifically, includes two extrusion arms 14, which are symmetrical about the center, that is, include two curved arms, wherein one end of the extrusion arm 14 is detachably mounted on the main shaft 15, and the other end is detachably mounted with a wear-resistant block 17, and the wear-resistant block 17 extrude the material from the sieve holes 61 on the sieve drum into granules as the extrusion arm 14 rotates, and the size and shape of the wear-resistant block 17 match the cavity of the sieve drum, and the wear-resistant block 17 is arc-shaped.

[0036] like Figure 1 and Figure 2As shown, in this embodiment, the granulation mechanism also includes at least one scraper arm 12, specifically, a scraper arm 12, which is a single arm and is arranged above the extrusion arm 14, wherein one end of the scraper arm 12 is detachably mounted on the main shaft 15, coaxial with the extrusion arm 14, and the other end is detachably mounted with a first scraper 18, and the first scraper 18 scrapes the material from the inner wall of the screen cylinder to the screen hole 61 as the scraper arm 12 rotates, and the size and shape of the first scraper 18 match the cavity of the screen cylinder, and the first scraper 18 is plate-shaped. In this embodiment, under the joint action of the scraper arm 12 and the extrusion arm 14, the scraper can be used to completely send the material to the screen hole of the screen cylinder, and then more materials can be made into particles under the action of the wear-resistant block 17, so that the resource utilization rate is higher, and no material accumulation will be caused, and the granulation efficiency is higher.

[0037] like Figure 1 and Figure 3 As shown, in this embodiment, the stirring mechanism includes a spiral stirring paddle 9 connected to the main shaft 15; at least one spiral element is detachably mounted on the spiral stirring paddle 9, specifically, includes two spiral elements arranged up and down; each spiral element includes at least one spiral blade 91, specifically, three spiral blades 91 are distributed along the circumferential direction on the spiral stirring paddle 9 to form a spiral element.

[0038] like Figure 1 and Figure 2 As shown, in this embodiment, the main shaft 15 is arranged at the center of the cylinder 8. After the main shaft 15 passes through the cylinder 8, it is connected to the main transmission mechanism 1. The main transmission mechanism 1 is arranged below the cylinder 8. Specifically, the main transmission mechanism 1 includes a drive motor and a transmission shaft, and the drive motor is installed on the frame 2.

[0039] like Figure 1 As shown, in this embodiment, a collecting mechanism is also provided on the frame 2, and the collecting mechanism includes a collecting plate 4 surrounding the bottom of the screen cylinder, and the collecting plate 4 is installed on the frame 2 through a turntable bearing, and the turntable bearing is connected to an auxiliary transmission mechanism 16, wherein the auxiliary transmission mechanism 16 includes a driving motor and a driving gear, and the auxiliary transmission mechanism 16 is installed on the frame 2; a baffle plate 3 is provided on the edge of the collecting plate 4, which can prevent particles from scattering, facilitate the transmission of particles to the discharge port, and finally transport the particles out continuously.

[0040] like Figure 1 , Figure 2 , Figure 4 As shown, in this embodiment, a scraping mechanism is also provided on the outside of the screen drum, and the scraping mechanism includes two second scrapers 20, which are symmetrically arranged. The second scrapers 20 are detachably mounted on the collecting tray 4. The second scrapers 20 scrape particles from the outer wall of the screen drum as the collecting tray 4 rotates. The size and shape of the second scrapers 20 match the outer wall of the screen drum; the second scraper 20 is plate-shaped.

[0041] In this embodiment, the rotation direction of the second scraper 20 is the same as the direction of rotation of the extrusion arm 14, and the same frequency; the angle between the second scraper 20 and the rotation direction corresponding to the extrusion arm 14 is 3° to 10°, and the angle between them can be selected according to needs, such as the angle can be 3°, 5°, 8°, 10°. In this embodiment, the angle between the second scraper 20 and the rotation direction corresponding to the extrusion arm 14 refers to the position of the second scraper 20 on the outside of the screen cylinder and the position of the extrusion arm 14 on the inner wall of the screen cylinder, and the central angle between the two and the main axis. In particular, since the extrusion granulation of the extrusion arm has a certain process, by setting a certain angle between the two, this process can be shortened, and the particle size can be controlled to be uniform. At the same time, the particle size can be further adjusted by adjusting the angle.

[0042] like Figure 1 and Figure 3 As shown, in this embodiment, the screen drum is detachably mounted on the frame 2, the screen drum is detachably connected to the silo via a clamp, and a feed outlet 19 is provided between the screen drum and the silo.

[0043] like Figure 1 and Figure 4 As shown, in this embodiment, a lower hopper 10 and a spray device 11 are provided above the silo. The spray device 11 includes at least one atomizing nozzle 111, specifically, four atomizing nozzles 111, and the four atomizing nozzles 111 are symmetrically distributed on the top of the silo. During the stirring process, the water required for granulation is added through the atomizing nozzles 111, so that no additional water is needed or less water is added during subsequent extrusion granulation.

[0044] like Figure 1 and Figure 5 As shown, the screen drum is composed of a plurality of screen plates 6, specifically 8 screen plates 6, which are detachably mounted on the bracket 5 along the circumferential direction, wherein seven screen plates are directly fixed on the screen drum bracket, and one screen plate is connected to the screen drum bracket through a movable door frame, which can facilitate cleaning of the inside of the screen drum. In addition, the bracket 5 can be detachably mounted on the frame 2, and the screen plate 6 is provided with a plurality of screen holes 61; a bottom plate 13 is provided at the bottom of the screen drum; the bottom plate 13 is conical; and a wear-resistant lining plate 7 is provided on the surface of the bottom plate 13.

[0045] In this embodiment, the scraper, wear-resistant lining plate, wear-resistant block and screen cylinder are all integrally cast with wear-resistant materials, which is beneficial to prolonging the service life of the granulator.

[0046] Taking lithium mica mixture as an example, in this embodiment, the disc screen granulator, when working, includes the following process: the proportioned lithium mica mixture enters the silo above the screen drum through the conveyor belt, the spray device supplies water, the spiral stirring paddle rotates counterclockwise, the lithium mica mixture and the water are fully stirred and mixed, and after the materials are evenly mixed, the discharge port is opened to enter the screen drum, the extrusion arm rotates counterclockwise, the material is stirred, mixed, kneaded and compacted in the screen drum, and extruded through the sieve holes of the screen drum wall, and then scraped off by the circulating scraper (second scraper) to form lithium mica particles of uniform size, which fall freely on the collection disk of the collection system. The collection disk rotates to drive the lithium mica particles above to be transported to the discharge port. The material in the center of the screen drum moves outward along the conical bottom plate under the action of gravity to avoid accumulation in the center. Therefore, the utility model can make the lithium mica mixture and the water fully and evenly mixed by pre-adding water and then granulating, thereby improving the material utilization rate. At the same time, it also has the advantages of simple equipment, convenient operation, and uniform size of particles formed by granulation. In particular, when used for preparing lithium mica particles, particles with high strength and uniform size can be obtained, which meets the requirements of lithium mica smelting.

[0047] Compared with conventional granulators, the disc screen granulator of the utility model is provided with a silo above the sieve drum, and the stirring mechanism in the silo can be used to stir the various materials so that the various materials are mixed evenly. By improving the mixing effect of the materials and the water, the uneven mixing of the materials and the water is prevented, which is beneficial to improving the lepidolite granulation effect. The stirring mechanism can also be used to promote the materials to enter the sieve drum, thereby improving the granulation efficiency. In particular, under the joint action of the granulation mechanism and the second scraper, the size of the formed particles can be controlled to be uniform, and the particle size can be adjusted. Finally, the mixed material can be made into particles of uniform size and meeting the smelting requirements. The utility model has not only a simple structure and convenient operation, but also can effectively improve the stirring and mixing effect of the materials and the resource utilization rate. The utility model is a new type of granulator, which can be widely used in the granulation of lithium mineral mixtures, has high use value and good application prospects.

[0048] The above is only a preferred embodiment of the utility model, and does not limit the utility model in any form. Although the utility model has been disclosed as above in the preferred embodiment, it is not used to limit the utility model. Any technician familiar with the field can make many possible changes and modifications to the technical solution of the utility model by using the methods and technical contents disclosed above without departing from the spirit and technical solution of the utility model, or modify it into an equivalent embodiment of equivalent changes. Therefore, any simple modification, equivalent replacement, equivalent change and modification made to the above embodiments based on the technical essence of the utility model without departing from the content of the technical solution of the utility model, still fall within the scope of protection of the technical solution of the utility model.

Claims

1. A disc screen granulator, characterized in that: It comprises a frame (2) and a cylinder (8) arranged on the frame (2), wherein the cylinder (8) comprises a screen cylinder and a silo arranged above the screen cylinder; a granulating mechanism is arranged in the screen cylinder, and a stirring mechanism is arranged in the silo; The granulating mechanism comprises at least one extrusion arm (14); one end of the extrusion arm (14) is detachably mounted on a main shaft (15), and the other end is detachably mounted with a wear-resistant block (17); the wear-resistant block (17) extrude materials from the sieve holes (61) on the sieve drum into granules as the extrusion arm (14) rotates; the size and shape of the wear-resistant block (17) match the cavity of the sieve drum; the wear-resistant block (17) is in an arc shape; The granulating mechanism further comprises at least one scraper arm (12); one end of the scraper arm (12) is detachably mounted on the main shaft (15), and the other end is detachably mounted with a first scraper (18); the first scraper (18) scrapes the material from the inner wall of the screen cylinder to the screen hole (61) as the scraper arm (12) rotates; the size and shape of the first scraper (18) match the cavity of the screen cylinder; the first scraper (18) is in the shape of a plate; The stirring mechanism comprises a spiral stirring paddle (9) connected to a main shaft (15); at least one group of spiral elements is detachably mounted on the spiral stirring paddle (9); each group of spiral elements comprises at least one spiral blade (91); the spiral blades (91) are distributed on the spiral stirring paddle (9) along a circumferential direction; A scraping mechanism is also provided on the outside of the sieve cylinder; the scraping mechanism comprises a second scraper (20), and the second scraper (20) is detachably mounted on the collecting plate (4); the second scraper (20) scrapes particles off the outer wall of the sieve cylinder as the collecting plate (4) rotates; the size and shape of the second scraper (20) match the outer wall of the sieve cylinder; the second scraper (20) is plate-shaped; the rotation direction of the second scraper (20) is the same as the direction of rotation of the extrusion arm (14); the angle between the second scraper (20) and the corresponding rotation direction of the extrusion arm (14) is 3° to 10°.

2. The disc screen granulator according to claim 1, characterized in that: The main shaft (15) is arranged at the center of the cylinder (8); after passing through the cylinder (8), the main shaft (15) is connected to the main transmission mechanism (1); and the main transmission mechanism (1) is arranged below the cylinder (8).

3. The disc screen granulator according to claim 1, characterized in that: The frame (2) is also provided with a material collecting mechanism; the material collecting mechanism comprises a material collecting plate (4) surrounding the bottom of the screen drum, the material collecting plate (4) being mounted on the frame (2) via a turntable bearing; the turntable bearing is connected to an auxiliary transmission mechanism (16); a material baffle plate (3) is provided at the edge of the material collecting plate (4).

4. The disc screen granulator according to any one of claims 1 to 3, characterized in that: The sieve drum is detachably mounted on the frame (2); the sieve drum is detachably connected to the silo via a clamp; and a material discharge port (19) is provided between the sieve drum and the silo.

5. The disc screen granulator according to claim 4, characterized in that: A lower hopper (10) and a spray device (11) are provided above the silo; the spray device (11) comprises at least one atomizing nozzle (111); the atomizing nozzle (111) is distributed on the top of the silo; the sieve cylinder is composed of a plurality of sieve plates (6), the sieve plates (6) are detachably mounted on a bracket (5); the bracket (5) is detachably mounted on a frame (2); a plurality of sieve holes (61) are provided on the sieve plate (6); a bottom plate (13) is provided at the bottom of the sieve cylinder; the bottom plate (13) is conical; a wear-resistant lining plate (7) is provided on the surface of the bottom plate (13).

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