A lithium slag rotary combustion device
By designing a lithium slag rotary combustion device, which employs a conical combustion chamber, a rotary drive assembly, and a feeding plate, the problem of rotary kilns being unable to fully combust lithium slag in one go has been solved, achieving full combustion of lithium slag and reduction of ash.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- CHONGQING TIANQI LITHIUM CO LTD
- Filing Date
- 2025-07-17
- Publication Date
- 2026-06-30
AI Technical Summary
Existing rotary kilns cannot fully burn lithium slag in one go, resulting in a large amount of unburned lithium slag remaining in the ash, requiring repeated burning.
A lithium slag rotary combustion device is designed, which adopts a conical combustion chamber and a rotary drive assembly, combined with a feeding plate and a blower assembly to ensure that the lithium slag is heated evenly in the combustion chamber and avoids sticking. The rotation and feeding plate work together to achieve complete combustion.
This method achieves complete one-time combustion of lithium slag, reduces unburned materials in the slag ash, and improves combustion efficiency and the practicality of the device.
Smart Images
Figure CN224434417U_ABST
Abstract
Description
Technical Field
[0001] This utility model belongs to the field of lithium slag combustion technology, and specifically relates to a lithium slag rotary combustion device. Background Technology
[0002] During the lithium metal smelting process, some solid waste is precipitated, which is lithium slag. The lithium content in lithium slag is much higher than that in lithium ore, therefore it needs to be recycled and reused. In existing technologies, a key step in recycling and reusing lithium slag is combustion, turning it into ash. The ash is then treated chemically to recover the lithium from the slag.
[0003] Currently, companies use rotary kilns to burn lithium slag. Although the rotary kiln can rotate when burning lithium slag, the ash formed by the combustion of lithium slag still contains a lot of lithium slag. In other words, the rotary kiln cannot fully burn the lithium slag that enters it at one time. Therefore, the ash needs to be sent back into the rotary kiln for combustion again, and sometimes the ash needs to be burned repeatedly.
[0004] Therefore, there is an urgent need for a combustion device that can more fully burn lithium slag in one go. Utility Model Content
[0005] This invention provides a lithium slag rotary combustion device to solve the technical problem that rotary kilns in the prior art cannot fully combust lithium slag in one go.
[0006] This utility model is achieved through the following technical solution: a lithium slag rotary combustion device, comprising:
[0007] The kiln is equipped with a conical combustion chamber, the combustion chamber is horizontal in axis, and the constricted end of the combustion chamber forms a feed inlet, and the open end of the combustion chamber forms an ash discharge outlet;
[0008] A rotary drive assembly is connected to the kiln and is used to drive the kiln to rotate around the central axis of the combustion chamber.
[0009] A feed plate is installed on the inner wall of the combustion chamber.
[0010] Furthermore, in order to better realize this utility model, the number of the material-pushing plates is multiple, the multiple material-pushing plates are distributed sequentially and at intervals along the axial direction of the combustion chamber, and the multiple material-pushing plates form a material-pushing assembly. The number of the material-pushing assemblies is multiple sets, and the multiple sets of material-pushing assemblies are distributed sequentially and at intervals along the circumference of the combustion chamber.
[0011] Furthermore, in order to better realize this utility model, the feed plate is a straight plate with one end fixed to the inner wall of the combustion chamber, the other end of the straight plate extends into the combustion chamber, and the straight plate is radially inclined relative to the combustion chamber.
[0012] Furthermore, in order to better realize this utility model, the cone angle of the combustion chamber is 0-15°.
[0013] Furthermore, in order to better realize this utility model, the cone angle of the combustion chamber is 7.5°.
[0014] Furthermore, to better realize this utility model, the rotary drive assembly includes:
[0015] The electric motor has a gear connected to its power output shaft;
[0016] A ring-shaped rack is fixed to the outer wall of the kiln. The ring-shaped rack is coaxially arranged with the combustion chamber, and the gear meshes with the ring-shaped rack.
[0017] Furthermore, in order to better realize this utility model, it also includes:
[0018] A silo for holding lithium slag, the silo being located above and to the side of the inlet of the kiln;
[0019] The feed pipe is inclined, and the bottom of the hopper is connected to the feed inlet of the kiln through the feed pipe.
[0020] Furthermore, in order to better realize this utility model, the feeding pipe is equipped with a valve, which is used to control the amount of lithium slag conveyed by the feeding pipe per unit time.
[0021] Furthermore, in order to better realize this utility model, the feed inlet of the kiln is also connected to a blower assembly, which is used to blow air into the feed inlet.
[0022] Furthermore, to better realize this utility model, the blower assembly includes:
[0023] Blower;
[0024] The hose has one end connected to the air outlet of the blower and the other end inserted into the feed inlet.
[0025] Compared with the prior art, this utility model has the following advantages:
[0026] The lithium slag rotary combustion device provided by this utility model sets the combustion chamber inside the kiln into a conical cavity with its axis horizontal. The constricted end and open end of the combustion chamber are respectively set as the feed inlet and ash discharge outlet of the device. The lithium slag enters the combustion chamber through the feed inlet and is discharged through the ash discharge outlet after combustion. The inner diameter of the feed inlet is smaller, so that the lithium slag entering the chamber is in a region with a smaller inner diameter, and the heat is more concentrated in the area where the lithium slag just enters (near the feed inlet), thus igniting more lithium slag near the feed inlet. The inner diameter of the ash discharge outlet is larger, making it easier to discharge slag and ash. The rotary drive component drives the kiln to rotate. This allows the slag in the combustion chamber to be heated and burned more evenly. During the rotation, the slag will slide down the inner wall of the combustion chamber from the feed port to the discharge port. This not only allows the slag to move within the combustion chamber but also effectively prevents it from sticking to the inner wall. The inner wall of the combustion chamber is equipped with a deflector plate. During the kiln's rotation, the deflector plate rotates with the kiln, thus deflecting the slag in the combustion chamber. In this way, the deflector plate can lift the slag located on the bottom wall of the combustion chamber upwards. The lifted slag will automatically fall back down under the action of gravity. During the falling process, it can better contact with oxygen, thereby making the slag burn more completely.
[0027] With the above structure, the device provided by this utility model can make the lithium slag entering its combustion chamber burn more completely in one go, and is more practical. Attached Figure Description
[0028] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.
[0029] Figure 1 This is a schematic diagram of the structure of the lithium slag rotary combustion device provided in this embodiment of the utility model;
[0030] Figure 2 This is a cross-sectional view of the kiln in an embodiment of the present invention (the arrows in the figure indicate the direction of rotation of the kiln).
[0031] In the picture:
[0032] 100-Kiln, 110-Combustion chamber, 120-Feed inlet, 130-Ash discharge outlet, 200-Rotary drive assembly, 210-Motor, 220-Gear, 230-Ring rack, 300-Pulling plate, 400-Hopper, 410-Feeding pipe, 420-Valve, 500-Blower assembly, 510-Blower, 520-Hose. Detailed Implementation
[0033] To make the objectives, technical solutions, and advantages of this utility model clearer, the technical solutions of this utility model will be described in detail below. Obviously, the described embodiments are only a part of the embodiments of this utility model, and not all of them. Based on the embodiments of this utility model, all other implementation methods obtained by those skilled in the art without creative effort are within the scope of protection of this utility model.
[0034] Example:
[0035] like Figure 1 and Figure 2 As shown, the lithium slag rotary combustion device provided in this embodiment includes a kiln 100, a rotary drive assembly 200, and a feeding plate 300, wherein:
[0036] The kiln 100 is rotatably mounted on a support that rests on the ground. A conical combustion chamber 110 is provided inside the kiln 100. The combustion chamber 110 is horizontal in axis, with its constricted end forming a feed inlet 120 and its open end forming an ash discharge outlet 130. To ensure combustion of the slag within the combustion chamber 110, in this embodiment, an ignition system can be installed inside the kiln 100 near the feed inlet 120 to ignite the lithium slag entering the kiln 100. Alternatively, a heat source system from an existing rotary kiln can be used to continuously provide high-temperature heat to the kiln 100. A rotary drive assembly 200 is connected to the kiln 100 and drives the kiln 100 to rotate around the central axis of the combustion chamber 110. A material-pushing plate 300 is disposed on the inner wall of the combustion chamber 110 and rotates along with the kiln 100 during its rotation. It is worth noting that the feed inlet 120 and ash discharge outlet 130 of the combustion chamber 110 pass through both ends of the kiln 100.
[0037] In operation, lithium slag enters the combustion chamber 110 through the feed inlet 120 and is discharged through the ash discharge outlet 130 after combustion. The feed inlet 120 has a smaller inner diameter, which places the lithium slag in a smaller inner diameter area. Furthermore, the heat is more concentrated in the area where the lithium slag first enters (near the feed inlet 120), allowing more lithium slag to be ignited near the feed inlet 120. The ash discharge outlet 130 has a larger inner diameter, facilitating the discharge of slag and ash. The rotary drive assembly 200 drives the kiln 100 to rotate, ensuring that the slag in the combustion chamber 110 is heated and burned more evenly. During rotation, the slag will flow along the combustion chamber... The inner wall of the combustion chamber 110 slides from the feed inlet 120 to the discharge outlet, which not only allows the slag to move within the combustion chamber 110, but also effectively prevents the slag from sticking to the inner wall of the combustion chamber 110. A material-pushing plate 300 is provided on the inner wall of the combustion chamber 110. During the rotation of the kiln 100, the material-pushing plate 300 rotates with the kiln 100, thereby pushing the slag in the combustion chamber 110. In this way, the material-pushing plate 300 can lift the slag located on the bottom wall of the combustion chamber 110 upwards. The lifted slag will automatically fall back down under the action of gravity. During the falling process, it can better contact with oxygen, thereby making the slag burn more completely.
[0038] With the above structure, the device provided by this utility model can make the lithium slag entering its combustion chamber 110 burn more completely in one go, and is more practical.
[0039] To effectively control the speed at which slag slides down the inner wall of the combustion chamber 110, in this embodiment, the cone angle of the aforementioned conical combustion chamber 110 is 0-15°, and optimally, the cone angle of the combustion chamber 110 is set to 7.5°. Of course, the cone angle of the combustion chamber 110 can also be set to 5°, 6°, 7°, 8°, 9°, 10°, 11°, 12°, 13°, or 14°.
[0040] Optionally, there are multiple material-pushing plates 300, which are arranged sequentially and at intervals along the axial direction of the combustion chamber 110. Specifically, the multiple material-pushing plates 300 are arranged in a straight line along the axial direction of the combustion chamber 110, and the multiple material-pushing plates 300 form a material-pushing assembly. There are multiple sets of material-pushing assemblies, which are arranged sequentially and at intervals along the circumference of the combustion chamber 110. In this way, when the kiln 100 rotates, more slag can be lifted at the same time, so that the slag in the combustion chamber 110 can be burned more completely.
[0041] The aforementioned material-pushing plate 300 is a straight plate. One end of the straight plate is welded and fixed or pre-embedded in the inner wall of the combustion chamber 110 of the kiln 100, and the other end of the straight plate extends into the combustion chamber 110. The length of the straight plate extending into the combustion chamber 110 can be 1-20 cm. The straight plate is made of a high-temperature resistant material and is radially inclined relative to the combustion chamber 110, with the straight plate inclined towards the material-facing side. It is worth noting that the material-facing side refers to the side where the straight plate directly pushes the slag material during rotation. This allows the material-pushing plate 300 to more smoothly push the slag material located at the bottom of the combustion chamber 110 upwards as the kiln 100 rotates.
[0042] An optional implementation of this embodiment is as follows: The rotary drive assembly 200 includes a motor 210, a gear 220, and a ring rack 230, wherein:
[0043] The electric motor 210 is mounted on a mounting frame or on the ground outside the kiln 100. The power output shaft of the electric motor 210 is connected to the aforementioned gear 220. When the electric motor 210 is running, it drives the gear 220 to rotate. The annular rack 230 is fixedly connected to the outer wall of the kiln 100. The annular rack 230 is coaxially arranged with the combustion chamber 110 and meshes with the aforementioned gear 220. In this way, the rotation output by the electric motor 210 can be transmitted to the kiln 100, thereby driving the kiln 100 to rotate.
[0044] The gear 220 and the ring rack 230 described above constitute one type of transmission pair. Of course, a chain drive or belt drive can also be used instead of the transmission pair composed of the gear 220 and the ring rack 230.
[0045] An optional implementation of this embodiment is as follows: The lithium slag rotary combustion device provided in this embodiment further includes a hopper 400 and a feeding pipe 410, wherein:
[0046] The silo 400 is used to hold lithium slag. The silo 400 is installed above the feed inlet 120 of the kiln 100, that is, the height of the silo 400 is higher than the feed inlet 120 of the kiln 100. The feed pipe 410 is inclined. One end of the feed pipe 410 is connected to the bottom of the silo 400, and the other end of the feed pipe 410 extends into the feed inlet 120 of the kiln 100. In this way, the lithium slag in the silo 400 can be transported into the feed inlet 120 of the kiln 100 by using the inclined feed pipe 410. In use, the operator only needs to feed the lithium slag into the aforementioned silo 400, and does not need to feed the lithium slag into the feed inlet 120 of the kiln 100, because the temperature at the feed inlet 120 of the kiln 100 is very high. Therefore, with the help of the aforementioned silo 400 and the feeding pipe 410, the operator can stay away from the aforementioned feed inlet 120 when feeding, ensuring safety. Moreover, it is not necessary to stop the operation of the device when feeding.
[0047] Optionally, a valve 420 is also installed on the feeding pipe 410. The valve 420 is used to control the amount of lithium slag conveyed by the feeding pipe 410 per unit time, thereby effectively controlling the amount of lithium slag entering the feed inlet 120 of the kiln 100 per unit time. The valve 420 can be a manual ball valve or a solenoid gate valve.
[0048] An optional implementation of this embodiment is as follows: The lithium slag rotary combustion device provided in this embodiment further includes a blower assembly 500, which is connected to the feed inlet 120 of the kiln 100. The blower assembly 500 is used to blow air into the feed inlet 120. In this way, not only can air be sent into the feed inlet 120 of the kiln 100, but also, because the other end of the feeding pipe 410 extends into the feed inlet 120, the blower assembly 500 can also disperse the lithium slag entering the feed inlet 120 when it is running, so that the lithium slag can be dispersed in the combustion chamber 110 near the feed inlet 120, thereby making it easier to ignite the lithium slag.
[0049] Optionally, the above-mentioned blower assembly 500 includes a blower 510 and a hose 520, wherein:
[0050] The blower 510 is installed on the ground or on a mounting frame outside the kiln 100. One end of the hose 520 is connected to the air outlet of the blower 510, and the other end extends into the feed inlet 120.
[0051] The above description is merely a specific embodiment of this utility model, but the protection scope of this utility model is not limited thereto. Any variations or substitutions that can be easily conceived by those skilled in the art within the technical scope described in this utility model should be included within the protection scope of this utility model. Therefore, the protection scope of this utility model should be determined by the protection scope of the claims.
Claims
1. A lithium slag rotary combustion apparatus, characterized by, include: A kiln (100) is provided with a conical combustion chamber (110), the axial direction of the combustion chamber (110) is horizontal, and the constricted end of the combustion chamber (110) forms a feed inlet (120), and the open end of the combustion chamber (110) forms an ash discharge outlet (130). A rotary drive assembly (200) is connected to the kiln (100) and is used to drive the kiln (100) to rotate around the central axis of the combustion chamber (110). A feed plate (300) is disposed on the inner wall of the combustion chamber (110).
2. The lithium slag rotary combustion device according to claim 1, characterized in that: The number of the material-dispensing plates (300) is multiple, and the multiple material-dispensing plates (300) are distributed sequentially and at intervals along the axial direction of the combustion chamber (110). The multiple material-dispensing plates (300) form a material-dispensing assembly. The number of the material-dispensing assemblies is multiple, and the multiple sets of material-dispensing assemblies are distributed sequentially and at intervals along the circumference of the combustion chamber (110).
3. The lithium slag rotary combustion device according to claim 2, characterized in that: The feed plate (300) is a straight plate with one end fixed to the inner wall of the combustion chamber (110), the other end of the straight plate extending into the combustion chamber (110), and the straight plate is radially inclined relative to the combustion chamber (110).
4. The lithium slag rotary combustion device according to claim 1, characterized in that: The cone angle of the combustion chamber (110) is 0-15°.
5. The lithium slag rotary combustion device according to claim 4, characterized in that: The cone angle of the combustion chamber (110) is 7.5°.
6. The lithium slag rotary combustion apparatus according to claim 1, wherein The rotary drive assembly (200) includes: An electric motor (210) has a gear (220) connected to its power output shaft; A ring rack (230) is fixed to the outer wall of the kiln (100). The ring rack (230) is coaxially arranged with the combustion chamber (110). The gear (220) meshes with the ring rack (230).
7. The lithium slag rotary combustion apparatus according to any one of claims 1 to 6, characterized by, Also includes: A silo (400) for holding lithium slag is provided above and to the side of the feed inlet (120) of the kiln (100); The feed pipe (410) is inclined, and the bottom of the hopper (400) is connected to the feed inlet (120) of the kiln (100) through the feed pipe (410).
8. The lithium slag rotary combustion device according to claim 7, characterized in that: The feeding pipe (410) is equipped with a valve (420), which is used to control the amount of lithium slag conveyed by the feeding pipe (410) per unit time.
9. The lithium slag rotary combustion device according to claim 7, characterized in that: The feed inlet (120) of the kiln (100) is also connected to a blower assembly (500), which is used to blow air into the feed inlet (120).
10. The lithium slag rotary combustion apparatus according to claim 9, wherein The blower assembly (500) includes: Blower (510); A hose (520) is connected to the air outlet of the air blower (510) at one end and extends into the feed inlet (120) at the other end.